• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a sewing machine needle clamping device. A sewing machine needle is securely and easily attached and fixed and replaced. A needle clamp (5) for clamping a sewing machine needle (3) has a receiving recess portion (7a) receiving a needle shaft (15) of the sewing machine needle, a clamping lever having a clamping arm (21) connected to the needle shaft (15) in FIG Engage, is freely opened and closed and is fixed to a clamping lever shaft (17) which is loosely mounted on a slot which is drilled on the needle clamp (5) for the female recess part (7a), and a needle fixing spring (23 ) elastically abutting the clamping lever in an outer direction of a straight line connecting a central point of the needle shank and a central point of the clamping lever shaft (17), and the clamping arm (20) has a force application locking member (22) mounted on the Needle shaft of the sewing machine needle against the spring force of the needle fixing spring (23) slides when the clamping lever is pivoted in a clamping direction (a) and passes a branch point position (TP), where the spring force of the needle-fixing spring (23) of the straight line connecting the central point of the needle shaft (15) of the sewing machine needle and the center point of the clamping lever shaft (17) becomes maximum, and maintains a stable clamping state by the spring force of the needle-fixing spring (23) ,
    公开号:CH712155A2
    申请号:CH01694/16
    申请日:2016-06-30
    公开日:2017-08-31
    发明作者:Sakuma Tohru
    申请人:Suzuki Mfg；
    IPC主号:
    专利说明:

    Description TECHNICAL FIELD
    The present invention relates to a Nähmaschinenennadeleinspann- or -klemmeinrichtung and refers in particular to the Nähmaschinennadeleinspanneinrichtung for safely and easily attaching, fixing or replacing a sewing machine needle in a needle clamp, such as a lockstitch sewing machine, overlock sewing machine, double chain stitch Sewing machine or cover stitch sewing machine.
    STATE OF THE ART
    It is known that in the lockstitch sewing machine, overlock sewing machine, double-chain stitch sewing machine or topstitch sewing machine, etc., a fabric which is to be squeezed is clamped between a needle plate and a presser foot, which by a presser or Fabric presser bar is pressed, and that it is advanced stitch by stitch through a feed cam mechanism and stitches are formed on the fabric by the sewing machine needle and a shooter hook or a gripper as a loop catcher.
    The shuttle hook or the gripper as a loop catcher and the feed dog mechanism are driven by a drive mechanism of a lower shaft, which is a drive shaft. On the other hand, the sewing machine needle is screwed by a screw to the needle clamp attached to the needle bar which is driven by an upper shaft whose driving force is supplied through the lower shaft via a sub-shaft pulley, a timing belt and a harmonic pulley (refer to Patent Document 1). 4).
    DOCUMENTS OF THE PRIOR ART
    PATENT DOCUMENTS
    [0004]
    Patent Document 1: JP H05-085 380 U. Patent Document 2: JP 2004-121 280 A
    Patent Document 3: JP 2007-151 777 A
    Patent Document 4: JP 3 181 298 U
    SUMMARY OF THE INVENTION PROBLEM TO BE SOLVED BY THE INVENTION
    However, in the above-mentioned sewing machine needle clamping device, on the other hand, when holding a sewing machine needle shank in a mounting position in the vertical direction on an inner side of the needle clamp, it is necessary to screw the sewing machine needle to the needle clamp with the screw by using a flat attachment surface formed on an outer surface of the needle clamp Sewing machine needle shaft is provided, is held on a flat mounting surface on the inside of the needle clamp. In this case, an operation required to screw one or more sewing machine needles with the screw to each needle clamp by touching and holding the flat attachment surface on the inside of the needle clamp is a complicated work for operators of the sewing machine with a screw driver.
    The present invention has been made to overcome these disadvantages. The object of the present invention is to provide a Nähmaschinennadeleinspanneinrichtung, in which the above-mentioned operation, a screwing of the sewing machine needle by the screw to the needle clamp by means of a screwdriver, unnecessary and the mechanism is simplified and the process as a "one-touch" Operation is performed and the sewing machine needle safely and easily attached to the needle clamp and fixed.
    MEANS OF SOLVING THE PROBLEMS
    In order to achieve the above objects, a sewing machine needle clamp of the present invention is the sewing machine needle clamp for attaching a sewing machine needle to a female recess portion of a needle clamp, the needle clamp having the female recess portion receiving a needle shaft of the sewing machine needle, the sewing machine needle clamping device has a clamping lever that is free to pivot and a clamping arm that engages with the needle shaft of the sewing machine needle that is opened and closed freely for the receiving recess part and that is fixed to a clamping lever shaft that is loosely in an elongated hole bored in the needle clamp, and a needle fixing spring elastically pushing the clamp lever in an outer direction of a straight line connecting a center point of the needle shaft of the sewing machine needle and a center point of the clamp lever shaft, w obei the clamping arm has a force-applying locking part, • which slides on the needle shaft of the sewing machine needle against the elasticity of the Nadelelfixierungsfeder when the clamping lever is pivoted in a clamping direction in a state that the needle shaft of the sewing machine needle is in engagement with the female recess part and • abuts a branch point position where the elasticity of the needle-fixing spring of the straight line connecting the center point of the needle shaft of the sewing machine needle and the center point of the clamping lever shaft becomes maximum, and • the stable clamping state held by the elasticity of the needle fixing spring.
    Besides, in the sewing machine needle clamp of the present invention, the needle shaft of the sewing machine needle, the pinch lever pinch shaft and the clamp arm of the clamp lever are composed in such sizes that a straight line and a distance between the center point of an engagement surface of the clamp arm and the center point of the clamp arm Clamp lever shaft to a straight line and a distance between the central point of the needle shaft of the sewing machine needle and the central point of the clamping lever shaft in a clamping state correspond.
    In the Nähmaschinennadeleinspanneinrichtung the present invention, the clamping lever of the needle clamp for the female recess part is freely opened and closed and is fixed to the clamping lever shaft, which is pivotally mounted on the slot, which is drilled in a mounting part, the up and down is provided in a mounting base of the needle clamp, and when the clamping lever shaft is pivotally mounted in the slot, it can be moved and stopped so that it can not move in the vertical direction, and a longitudinal direction of the slot the same direction as that of a straight line which connects the center point of the needle shaft of the sewing machine needle, which is mounted in the female recess portion of the needle clamp, and the central point of the clamping lever shaft.
    In the sewing machine needle clamping device of the present invention, a magnetic body that magnetically attracts the needle shaft of the sewing machine needle is embedded in the receiving recess part that receives the needle shaft of the sewing machine needle.
    EFFECT OF THE INVENTION
    In a needle exchange device of the sewing machine of the present invention, the mechanism is simplified and the operation is carried out by one-touch operation for a few times, and the sewing machine needle can be used in a lockstitch sewing machine, overlock sewing machine , Double chain stitch sewing machine or top stitch sewing machine safely and easily attached to the needle clamp, fixed or replaced.
    BRIEF DESCRIPTION OF THE DRAWINGS
    [0012]
    Fig. 1 is an overall perspective view of a front of the sewing machine, where the Nähmaschinennade leinspannvorrichtung the present invention is mounted.
    FIG. 2a is a front view of the sewing machine needle clamp that clamps the sewing machine needle of the first embodiment of the present invention. FIG.
    2b shows a top view of the sewing machine needle clamping device, which clamps the sewing machine needle to the needle clamp, according to the present invention.
    FIG. 2c Rear view of the sewing machine needle clamping device that clamps the sewing machine needle, the first embodiment of the present invention.
    Fig. 2d Perspective view of the sewing machine needle clamping device that clamps the sewing machine needle, the first embodiment of the present invention.
    FIG. 3a is an exploded perspective view of the sewing machine needle clamping device of the present invention; and FIG
    3b is a partial perspective view of the sewing machine needle clamping device, seen from the direction of the arrow A in (a).
    Fig. 4a Schematic plan view of the Nähmaschinennadeleinspannvorrichtung in a state before clamping the sewing machine needle in the needle clamp, according to the present invention.
    Fig. 4b Schematic plan view of the Nähmaschinennadeleinspannvorrichtung in a state after clamping the sewing machine needle in the needle clamp, according to the present invention.
    Fig. 4c Schematic plan view of the Nähmaschinennadeleinspannvorrichtung in a state after the further continuation of the clamping operation.
    Fig. 4d Schematic plan view of the Nähmaschinennadeleinspannvorrichtung in a state in which the clamping operation of the sewing machine needle is terminated in the needle clamp.
    Fig. 5a Schematic representation of the movement of the Nähmaschinennadeleinstellvorrichtung in a state immediately after the clamping of the sewing machine needle in the needle clamp, according to the present invention.
    Fig. 5b Schematic representation of the movement of the Nähmaschinennadeleinstellvorrichtung in a state after the continuation of a clamping operation of the sewing machine needle in the needle clamp, according to the present invention.
    Fig. 5c Schematic representation of the movement of the Nähmaschinennadeleinstellvorrichtung in a state in which the clamping operation of the sewing machine needle is terminated in the needle clamp, according to the present invention.
    Fig. 6a Schematic representation of the Nähmaschinennadeleinspannvorrichtung according to the second embodiment of the present invention.
    Fig. 6b Schematic representation of the Nähmaschinennadeleinspannvorrichtung according to the third embodiment of the present invention.
    Fig. 7 Schematic representation of the temporary holding of a position of these states in the interior of a receiving recess part before clamping the sewing machine needle in the needle clamp, using the Nähmaschinennadeleinstellvorrichtung according to the present invention.
    MODE OF CARRYING OUT THE INVENTION
    Hereinafter, the preferred embodiments will be explained in detail with reference to the drawings in which the sewing machine needle clamp of the present invention is applied to a 2 (two) needle 4 (four) thread overlock sewing machine (hemstitch sewing machine).
    As shown in Fig. 1, in this 2-needle 4-thread hemstitch sewing machine (overlock sewing machine) 40, the fabric to be stitched is stitched between the stitch board 42 and the presser foot through the presser bar. fed stitch by the feed dog mechanism, and stitches are formed on the fabric by the sewing machine needle 3 and the gripper 44 as a loop catcher.
    This gripper 44 as a loop catcher and the feed dog mechanism are driven by each drive mechanism of the lower shaft 46, which is the drive shaft. On the other hand, the sewing machine needle 3 is fixed to the needle clamp 5 which is attached to the needle bar 58 driven by a needle bar drive mechanism 56 having the upper shaft 54 moved from the lower shaft 46 at a rotation ratio of 1: 1 via the sub shaft plate 48, the timing belt 50 and the harmonic disk 52 is transmis-driven. The upper shaft 54 and the needle bar drive mechanism 56 are attached to a sewing machine arm. The throat plate 42, the looper 44 as a loop catcher, and the feed dog mechanism are attached to a sewing machine bed.
    In the mentioned 2-needle 4-thread hemstitch sewing machine (overlock sewing machine) 40, the fabric to be stitched, sandwiched between the needle plate 42 and the presser foot, is pressed by the presser bar, and it becomes stitched. fed stitch by the feed dog mechanism, and stitches are formed on the fabric by the sewing machine needle 3 and the gripper 44 as a loop catcher. However, because the number, the specific structure and the operation of the throat plate 42 and the gripper 44 as a loop catcher for forming the stitches are publicly known or well-known, detailed explanations are omitted.
    As shown in Fig. 2-Fig. As shown in Fig. 6, a feature of the present invention exists in the sewing machine needle clamp 1 which attaches the sewing machine needle 3 to the female recessed portion 7 of the needle clamp 5. Hereinafter, this will be described in detail as a first embodiment. The needle clamp 5 has a fixing cylindrical portion 11 such that the needle clamp 5 is fitted into the needle bar 58 and attached by the screw 9 and a mounting base 13 integrally extending from top to bottom. In addition, in this embodiment, although the needle clamp 5 may be attached as a separate part from the needle bar 58, the needle clamp 5 may be integrally formed with and attached to the needle bar 58. The needle clamp 5 has the above-mentioned female recess portion 7 which receives the needle shaft 15 of the sewing machine needle 3 in a central mounting portion 13c in the mounting base 13. The female recess portion 7 and the mounting base 13 of the needle clamp 5 are symmetrically arranged 1: 1 with respect to a central longitudinal portion of the needle clamp 5.
    In two sewing machine needles 13, an end face of the shank of the needle shank 15 is butted in various attachment positions in the vertical direction of the inside of the needle clamp 5, and a flat attachment surface 15a formed on the outer peripheral surface of the needle shank 15 the sewing machine needle 3 is provided, abuts a flat mounting surface 7 a of the female recess part 7 on the inside of the needle clamp 5.
    The needle clamp 5 has a clamp lever 19 which is freely opened and closed and attached to a clamp lever shaft 17 which is pivotally mounted in an elongated hole 13b bored in a mounting part 13a which is up and down in the Attachment base 13 of the needle clamp 5 is provided for the female recess part 7. When the clamp lever shaft 17 is pivotally mounted in the long hole 13b, it can pivotally move and stop so that it can not move in the vertical direction. A longitudinal direction of the long hole 13b is the same direction as that of a straight line L2 having a central point N of the needle shaft 15 of the sewing machine needle 3 received in the female recess part 7 of the needle clamp 5 and a central point The center P of the clamping lever shaft 17 connects (Figure 5a). The clamping lever 19 has a clamping arm 21, which is in engagement with an outer or peripheral surface of the needle shaft 15 of the sewing machine needle 3.
    [0020] Besides, the needle clamp 5 has a plate-like needle fixing spring 23 which elastically pushes the clamp lever 19 in an outward direction of the straight line connecting the central point N of the needle shank 15 of the sewing machine needle 3 and the center point P of the clamp lever shaft 17, and a plate-like spring 25 which fixes the clamp lever 19 by a projection 16 and prevents it from moving more freely when the sewing machine needle 3 is not attached. Two plate-like springs are fixed to the attachment part 13c of the vertical direction of the attachment base 13 by a screw 27 in a central part with back-to-back overlap. In addition, a thread guide 29, which leads a thread to a needle eye of the sewing machine needle, fixed with a screw 31 on the clamping lever 19.
    In Nähmaschinennadeleinspanneinrichtung 1, the clamping arm 21 has a force-applying locking member 22 which slides on the needle shaft 15 of the sewing machine needle 3 against the elasticity of the Nadelelfixierungsfeder 23 when the clamping lever 19 in a clamping direction «a» (Fig. 4b-Fig. 4d, Fig. 5a-5c) is pivoted in a state in which the needle shaft of the sewing machine needle is engaged with the female recess portion 7 and abuts on the mounting position 7b (Fig. 2a) of a vertical direction, and one Branch point position tp (Fig. 5b-5c) passes where the elasticity of the needle fixing spring 23 of the straight line L2, which connects the central point N of the needle shaft 15 of the sewing machine needle 3 and the central point P of the clamping lever shaft becomes a maximum, and a stable clamping state by the elasticity of the Nadelelfixierungsfeder 23 holds.
    In the sewing machine needle clamping device 1 of the present invention formed in this way, in the state before clamping the sewing machine needle 3 to the needle clamp 5, the needle shaft 15 of the sewing machine needle 3, the clamping lever shaft 17 of the needle clamp 5 and the clamp arm 21 of the clamping lever 19 is positioned as shown in Fig. 4a.
    In the sewing machine needle clamping device of the present invention, e.g. the end face of the shank of the needle shank 15 to another attachment position of the vertical direction on the inner side of the needle clamp 5, and the flat attachment face 15a provided on the outer face of the needle shank 15 of the sewing machine needle 3 abuts against the shallow attachment face 7a of the female recess. Part 7 on the inside of the Nadelklamme 5 on the left side, and in the state immediately after clamping the clamping lever 19 in the clamping direction «a» right hand, the Klemmhebelwelle 17 is elastically pushed back by Nadelfixierungsfeder 23 and to a hole surface of the outer direction of the elongated hole 13 b in Direction of the straight line which connects the central point N of the needle shaft 15 of the sewing machine needle 3 and the central point P of the clamping lever shaft 17 (Fig. 5a)). At this point, the force-applying locking part 22 of the clamping arm 21 of the clamping lever 19 can not rise above the needle shaft 15 of the sewing machine needle 3. As shown in FIG. 4b, a straight line distance L1a that exists between a tip 21a of the clamp arm 21 and the center point P of the clamp lever shaft 17, and the distance L2a that a radius of the needle shank in the direction of the straight line that is the central point N of the needle shaft 15 of the sewing machine needle 3 and the central point P of the clamping lever shaft 17 connects, is added, not in accordance, ie the relation L1a <L2a applies. In this state, the straight line L1 which connects the central point C of an engagement surface 12b of the clamp arm 20 where an outside diameter and a curvature of the needle shank 15 are in correspondence and the central point P of the clamp lever shaft 17 deviates from the straight line L2. which connects the central point N of the needle shaft of the sewing machine needle and the central point P of the clamping lever shaft, by a considerable angle.
    In the sewing machine needle clamping device of the present invention, e.g. the end surface of the shaft of the needle shank 15 of the sewing machine needle 3 at the attachment position of the vertical direction on the inside of the needle clamp 5, and the flat attachment surface 15a provided on the outer surface of the needle shank 15 of the sewing machine needle 3 abuts against the flat attachment surface 7a of the female Recess part 7 on the inside of the Nadelklamme 5, and in the state after the continuation of the clamping operation of the clamping lever 19 in the clamping direction «a» resists the tip 21a of the clamping arm 21 of the clamping lever 19, ie the force-applying locking part 22, elastically pushing back the needle-fixing spring 23 by rising over the needle shaft 15 of the sewing machine needle and moving toward the center point N of the needle shaft 15 of the sewing machine needle 3 on the inner side of the long hole 13b (FIG. 5b). As shown in FIG. 4c, in this state, in the sewing machine needle 3, the needle clamp 5 and the clamp lever 19, the straight line L1 connecting the central point C of the engagement surface 21b of the clamp arm 21 and the center point P of the clamp lever shaft 17 deviates et, slightly at an angle from the straight line L2, which connects the central point N of the needle shaft 15 of the sewing machine needle 3 and the central point P of the clamping lever shaft 17. Incidentally, in other words, in this state, the straight line distance L1a which exists between a tip 21a of the clamp arm 21 and the center point P of the clamp lever shaft 17, and the distance L2a, is a radius of the needle shank in the direction of the straight line , which connects the central point N of the needle shaft 15 of the sewing machine needle 3 and the central point P of the clamping lever shaft 17, is added, in correspondence, ie L1a = L2a. However, in the needle shaft 15 of the sewing machine needle 3, the clamping lever shaft 17 of the needle clamp 5 and the clamping arm 21 of the clamping lever 19, the distance L1, which is between the central point C of the engaging surface 21b of the clamping arm 21 and the central point P of the clamping lever shaft 17, and the distance L2, which exists between the central point N of the needle shaft of the sewing machine needle and the central point P of the clamping lever shaft 17, not in accordance, ie it is L1> L2 (Fig. 5b).
    In the sewing machine needle clamping device of the present invention, the end surface of the shaft of the needle shank 15 of the sewing machine needle 3 abuts the attachment position of the vertical direction on the inner side of the needle clamp 5, and the flat attachment surface 15 a provided on the outer surface of the needle shank 15 of the sewing machine needle 3 is, abuts the planar mounting surface 7a of the female recess portion 7 on the inside of the needle clamps 5, and in the state where the clamping operation of the clamp lever 19 in the direction of the arrow "a" is completed, in other words, in the clamping state When the force-applying lock member 22 has exceeded the position of the branch point tp, so that the elastic force of the needle fixing spring 23 on the straight line L2, the central point N of the needle shaft 15 of the sewing machine needle 3 on the needle shaft 15 of the sewing machine needle 3 and the central Point P of the clamping lever shaft 17 ve rbindet is maximum, the curvature of the needle shaft 15 of the sewing machine needle 3 and the curvature of the clamping arm 21 of the clamping lever 19 in correspondence, whereby the Klemmhebelweile 17 returns to the hole surface of the outer direction of the elongated hole 13b in the direction of the straight line which the central point N des Needle shaft 15 of the sewing machine needle 3 and the central point P of the clamping lever shaft connects, and the central point C of the engaging surface 21b of the clamping arm 21 and the central point of the needle shaft 15 of the sewing machine needle 3 are in correspondence (Fig. 5c). As a result, the force F elastically pushes and presses the clamping lever shaft 17 toward the central point N of the needle shank 16 - the central point P of the clamping lever shaft 17, and the sewing machine needle 3 is stably fixed by the needle fixing spring 23. The stable clamping state is maintained in this positional relationship. As shown in Fig. 4d, in this state, the sewing machine needle 3, the needle clamp 15 and the clamping lever 19 are composed as sizes that the straight line L1, the central point C of the engaging surface 21b of the clamping arm 21 and the central point P of the clamping lever shaft 15 connects, corresponding to the straight line L2, which connects the central point N of the needle shaft 15 of the sewing machine needle 3 and the central point P of Klemmhebelweile 17. Incidentally, in other words, in this state, the straight line distance L1a which exists between a tip 21a of the clamp arm 21 and the center point P of the clamp lever shaft 17, and the distance L2a, is a radius of the needle shank in the direction of the straight line , which connects the central point N of the needle shaft 15 of the sewing machine needle 3 and the central point P of the clamping lever shaft 17, is added, in correspondence, ie L1a = L2a. However, in the needle shaft 15 of the sewing machine needle 3, the clamping lever 17 of the needle clamp 5 and the clamping arm 21 of the clamping lever 19 are the distance L1 connecting the central point C of the engaging surface 21b of the clamping arm 21 and the center point P of the clamping lever shaft, and the distance L2, which connects the central point N of the needle shaft of the sewing machine needle and the central point P of the clamping lever shaft, in correspondence. This means that L1 = L2 (FIG. 5c).
    In the sewing machine needle clamping device of the present invention, although a peripheral surface of the needle shaft 15 of the sewing machine needle 3 and a curved surface of the clamping arm 21 of the clamping lever 19 correspond to each other in the second embodiment shown in Fig. 6a, a radius of curvature of the peripheral surface of the needle shaft 15 of Sewing machine needle 3 greater than that of the curved surface of the clamping arm 21 of the clamping lever 19. In this case, in the clamped state, the force-applying locking member 22 rises above the branch point position tp, and the stable clamping state is maintained.
    Incidentally, in the third embodiment shown in Fig. 6 (b), the radius of curvature of the peripheral surface of the needle shaft 15 of the sewing machine needle 3 is smaller than that of the curved surface of the clamping arm 21 of the clamping lever 19. In this case, in the clamped state, the force-applying lock member 22 via the branch point position tp, and the stable clamping state is maintained.
    In addition, as shown in Fig. 7, in the Nähmaschinennadeleinspanneinrichtung the present invention, a magnetic body 33, which magnetically attracts the needle shaft 15 of the sewing machine needle 3, which is formed of a magnetic material, in the receiving recess part 7th embedded, which receives the needle shaft 15 of the sewing machine needle 3. In this structure, when the end surface of the shaft of the needle shaft 15 of the sewing machine needle 3 abuts on the mounting position of the vertical direction on the inner side of the needle clamp 5, the flat attachment surface 15 a provided on the peripheral surface of the needle shaft 15 of the sewing machine needle 3 abuts against the planar attachment surface 7a of the female recess portion 7 on the inner side of the needle (5), and the sewing machine needle 3 is attached to the needle shaft 15 before clamping because these positions in this state on the inner side of the female recess portion by one-touch Operation can be temporarily held, and the mounting work is easy.
    As is apparent from the above explanation, in the Nähnadeleinspanneinrichtung of the present invention, an operation in which the thin sewing machine needle by means of a screw in a small available space is screwed securely by means of a screwdriver, not required, and the mechanism is simplified, and the operation is performed a few times by a One Touch operation, and the sewing machine needle such as a lockstitch sewing machine, overlock sewing machine, double-chain stitch sewing machine or topstitch sewing machine can be securely and easily attached, fixed or replaced on the needle clamp.
    INDUSTRIAL APPLICABILITY
    Since the sewing machine needle is easily and securely attached and fixed to the needle clamp, the sewing machine needle clamping device of the present invention can be suitably applied to various types of sewing machines such as a lockstitch sewing machine, overlock sewing machine, double chain stitch sewing machine or topstitch sewing machine , be applied.
    EXPLANATION OF REFERENCE NUMBERS
    I Sewing machine needle clamping device 3 Sewing machine needle 5 Needle clamp 7 Receiving recess part 7a Plane Mounting surface 9 Screw II Fixing cylindrical portion 13 Mounting base 13a Mounting part 13b Slot 13c Mounting part of vertical direction 15 Needle shaft 15a Plane Attaching surface 17 Clamping lever shaft 19 Clamping lever 21 Clamping arm 21a Tip of clamp arm 21b engaging surface
    权利要求:
    Claims (4)
    [1]
    22 Force-applying locking part 23 Needle-fixing spring 25 Spring 27 Screw 29 Thread guide 31 Screw 33 33 Magnetic body 40 Hemstitch sewing machine 42 Needle plate 44 Gripper as loop catcher 46 Lower shaft 48 Subshaft pulley 50 Timing belt 52 Harmonic disk 54 Upper shaft 56 Needle bar drive mechanism 58 Needle bar aa Clamping direction / clamping direction L1 Straight distance between the central point of the engaging surface of the clamping arm and the central point of the clamping lever shaft L1a Straight distance between the tip of the clamping arm and the central point of the clamping lever shaft L2 Straight distance between the central point of the needle shaft and the central point of the clamping shaft Clamp lever shaft L2a distance that the radius of the needle shaft is added in the direction of a straight line connecting the central point of the needle shaft of the needle and the central point of the clamping lever shaft C central point of Eingriffsflä of the clamping arm N Central point of the needle shaft P Central point of the clamping lever shaft tp Branch point position Claims
    A sewing machine needle clamp for attaching a sewing machine needle to a receiving recess portion of a needle clamp, the needle clamp having the female recess portion receiving a needle shaft of the sewing machine needle, characterized by comprising: a clamp lever which releases can pivot and has a clamping arm which is engaged with the needle shaft of the sewing machine needle, which is opened and closed freely for the receiving recess part and which is fixed to a clamping lever shaft which is loosely fitted in a slot drilled in the needle clamp and a needle fixing spring elastically pushing the clamp lever in an outer direction of a straight line connecting a central point of the needle shaft of the sewing machine needle and a center point of the clamp lever shaft, wherein the clamp arm has a force applying lock member; Needle shaft of sewing machine needle against the elasticity of the needle fixing spring, when the clamp lever is pivoted in a clamping direction in a state that the needle shaft of the sewing machine needle is engaged with the female recess part and abuts the attachment position of a vertical direction, and • passes a branch point position where the elasticity of the needle-fixing spring of the straight line connecting the central point of the needle shaft of the sewing machine needle and the center point of the clamping lever shaft becomes a maximum, and holds a stable chucking state by the elasticity of the needle-fixing spring.
    [2]
    The sewing machine needle clamp according to claim 1, characterized in that: the needle shaft of the sewing machine needle, the pinch lever pinch shaft and the clamp arm of the clamp lever are sized such that a straight line and a distance between the central point of an engagement surface of the clamp arm and the central one Point of the clamping lever shaft to a straight line and a distance between the central point of the needle shaft of the sewing machine needle and the central point of the clamping lever shaft in a clamping state correspond.
    [3]
    3. Nähmaschinennadeleinspannvorrichtung according to claim 1 or claim 2, characterized in that: the clamping lever of the needle clamp for the female recess part is freely opened and closed and fixed to the clamping lever shaft, which is pivotally mounted on the elongated hole, which is drilled in a mounting part which is provided up and down in a mounting base of the needle clamp, and when the clamping lever shaft is pivotally mounted in the slot, it can be moved and stopped so that it can not move in the vertical direction, and a longitudinal direction of the elongated hole the same Direction is like a straight line connecting the central point of the needle shaft of the sewing machine needle, which is mounted in the receiving recess portion of the needle clamp, and the central point of the clamping lever shaft.
    [4]
    The sewing machine needle clamp according to any one of claims 1 to 3, characterized in that: a magnetic body that magnetically attracts the needle shaft of the sewing machine needle is embedded in the female recess part that receives the needle shaft of the sewing machine needle.
    类似技术:
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    同族专利:
    公开号 | 公开日
    WO2017149793A1|2017-09-08|
    TW201732111A|2017-09-16|
    JP6703254B2|2020-06-03|
    KR20180115820A|2018-10-24|
    DE112016000046T5|2017-11-23|
    TWI734712B|2021-08-01|
    CN107614775A|2018-01-19|
    US10422061B2|2019-09-24|
    CH712155B1|2021-10-15|
    AU2016395111A1|2018-06-07|
    JP2017153534A|2017-09-07|
    AU2016395111B2|2021-10-07|
    CN107614775B|2020-12-15|
    US20180347088A1|2018-12-06|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP2016037066A|JP6703254B2|2016-02-29|2016-02-29|Sewing machine needle clamp device|
    PCT/JP2016/069417|WO2017149793A1|2016-02-29|2016-06-30|Sewing machine needle clamping device|
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