• 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:
    An apparatus for braking a heald frame of a loom, comprising: a drive unit configured to drive heald frames; pitch forming systems configured to convert a driving force of the drive unit for the purpose of transmitting the converted drive force to heald frames, the pitch forming systems including elements to which a step is applied braking; and a brake application mechanism configured to apply brakes to the members, characterized in that they include portions having an arcuate configuration, and are capable of pivoting about a pivot shaft; the mechanism includes a number of brake application elements which are configured to exert pressure on the portions having an arcuate configuration, and a portion of the brake application elements is configured to exert pressure on the portions having an arched shape configuration.
    公开号:BE1027809B1
    申请号:E20205909
    申请日:2020-12-11
    公开日:2021-11-24
    发明作者:Yasuaki Takagi；Haruo Shimazaki
    申请人:Toyota Jidoshokki Kk；
    IPC主号:
    专利说明:

    ; BE2020 / 5909 BRAKING DEVICE FOR A HINGE FRAME OF A WEAVING Loom
    BACKGROUND ART The present invention relates to an apparatus for braking a heddle frame of a loom. As a braking device for applying braking to heddle frames of an electronic pitch forming device of a loom in the event of a failure in an electrical power system or a power failure, the braking apparatus of the heddle frame of a loom disclosed in Japanese Patent Application Publication No. H10-298843 is known. This braking device applies braking to the heald frames by compressing a brake shoe against side supports of the heald frames. In the case of the loom heald frame braking apparatus disclosed in the above patent application publication, the brake pad is compressed against the heald frame side supports which have in a manner. generally a small thickness. An intense force is thus exerted on the heddle frames in a direction of the latter, which is oriented inwardly, which causes a significant load that the heddle frames have to support.
    JP 2003 073953 discloses an apparatus for braking a heald frame of a loom, comprising: a drive unit configured to drive a number of heddle frames; a number of pitch forming systems configured to convert a drive force of the drive unit for the purpose of transmitting the converted drive force to the respective heald frames, the pitch forming systems including a number of stringer frames. number of elements to which braking is applied, respectively; and a brake application mechanism configured to apply brakes to the elements to which braking is applied. The present invention has been conceived on the basis of the above-mentioned circumstances and it is an object to provide a braking apparatus of a heddle frame of a loom which has a simple structure and which is configured so as to reduce the stress. loads that the heald frames must withstand during the application of brakes on the heald frames.
    SUMMARY In accordance with one aspect of the present invention, there is provided an apparatus for braking a heald frame of a loom which includes a drive unit which is configured to drive a number of heddle frames, a number of which are provided. number of pitch forming systems, which are configured to convert a driving force of the driving unit for the purpose of transmitting to the respective heald frames the driving force which has been converted, and which include a certain number of elements to which the braking is applied, respectively, as well as a brake application mechanism which is configured to apply brakes to the elements to which the braking is applied. The elements to which the braking is applied include portions having an arau-shaped configuration, respectively, and are capable of pivoting about a common pivot shaft. The brake application mechanism includes a number of brake application elements which are configured to compress the portions of the elements to which the braking is applied, having an arcuate shape configuration, respectively. At least part of the brake application elements are configured to compress the portions having an arcuate shape configuration for the purpose of applying the brakes to the heddle frames, respectively. Other aspects and advantages of the invention will emerge from the description which follows, when it is taken in conjunction with the appended drawings which illustrate the principles of the invention by way of example.
    BRIEF DESCRIPTION OF THE DRAWINGS The invention, together with its objects and advantages, can be best understood by reference to the following description of the embodiments, together with the accompanying drawings in which: FIG. 1 represents a schematic view of an electronic pitch forming apparatus in accordance with one embodiment of the present invention: Fig. 2 is a schematic view of a heddle frame braking apparatus illustrated in Fig. 1; FIG. 3 represents a schematic view illustrating a first state of the arm frame braking device illustrated in FIG. 2: and FIG. 4 represents a schematic view illustrating a second state of the arm frame braking device illustrated in figure 2.
    DETAILED DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will now be described in detail with reference to the accompanying drawings.
    Referring to Fig. 1, there is illustrated a schematic view of an electronic pitch forming apparatus in accordance with the embodiment of the present invention.
    An electronic step-training device | includes sixteen heddle frames 21 and sixteen slat tie rods 30 which are arranged below the heddle frames 21, correspondingly to the heddle frames 21. Each of the slat tie rods 30 is connected to the associated heald frame 21 by the intermediary of a lever 41 and a lever 42. A motor 43 is connected to each of the levers 42 for the purpose of oscillating the associated blade tie rod 30 in order to drive the associated heddle frame 21. At d In other words, each of the blade tie rods 30, the associated lever 41 and the associated lever 42 form a pitch forming system which converts a pivoting movement of the associated motor 43 into a vertical back-and-forth movement and transmits the pitch. vertical movement back and forth to the associated stringer frame 21. Each of the levers 41 includes a portion 41a having an arcuate configuration on a peripheral portion of said lever and is capable of pivoting about a pivot shaft of said lever.
    Each of the levers 42 includes a portion 42a having an arcuate configuration on a peripheral portion of said lever and is capable of pivoting about a pivot shaft of said lever.
    Each of the tie rods 30 includes an intermediate stabilization device 31 in its middle portion.
    A braking apparatus 32 which is configured to apply brakes to the heddle frames 21 is disposed above these intermediate stabilizing devices 31. The motors 43 form a drive unit.
    Referring to Figure 2, each of the intermediate stabilization devices 31 includes a portion 31a having an arcuate configuration on a peripheral portion of the device in question and assumes a circular configuration.
    These intermediate stabilization devices 31 are provided for the blade ends 30, correspondingly to the heddle frames 21, respectively (see Figure 1). The embodiment of the present invention encompasses the sixteen heddle frames 21 and correspondingly the sixteen intermediate stabilizers 31, integrally.
    A shaft 33 is provided through these intermediate stabilization devices 31 in a radial center of the devices in question.
    These intermediate stabilizers 31 are capable of individually pivoting around shaft 33 in a circumferential direction.
    This configuration allows the blade tie rods 30 to oscillate individually and the heddle frames 21 which are connected to the associated blade tie rods 30 [see Figure 1] to be driven individually.
    The intermediate stabilizing devices 31 have a large dimension compared to that of the intermediate stabilizing devices which are provided for conventional looms.
    The shaft 33 corresponds to a pivot shaft.
    The braking apparatus 32 which is disposed above the intermediate stabilizers 31 is supported by the tie rods by means of a support 340. The support 34a is connected to a top panel 34b.
    An air cylinder 35, a rod 36, and brake levers 37 are disposed above the top panel 34b.
    The pneumatic cylinder 35 is driven with air from the installation which is supplied to the pneumatic cylinder 35. The rod 36 is pulled inward and is pushed outward by the driven pneumatic cylinder 35. The brake levers 37 are connected to the rod 36. The sixteen brake levers 37 are correspondingly provided for the sixteen intermediate stabilizers 31. The brake levers 37 pivot about a bracket in an upward direction as the rod 36 is pulled out. inward and in a downward direction when the rod 36 is pushed outward.
    Sixteen brake application elements 38 are disposed below the top panel 34b, while being connected to the brake levers 37, respectively, correspondingly to the sixteen intermediate stabilization devices 31. Each of the brake application elements 38 are connected. moves synchronously with the associated brake lever 37. The brake application elements 38 are subjected to an upward movement when the associated brake levers 37 pivot in the upward direction, and are subjected to a downward movement when the brake levers. associated brakes 37 pivoted in the downward direction. A lower portion of each of the brake application elements 38 is subjected to bending to obtain an arcuate shape configuration which corresponds to that of the portion 31a of the corresponding intermediate stabilizer 31, having an arcuate shape configuration. Further, a surface of the portion 31a of each of the intermediate stabilizers 31, having an arcuate shape configuration is treated to roughen it so as to obtain an appropriate level of friction between the element d. brake application 38 and the portion 31a having an arcuate configuration on the outer peripheral surface of the corresponding intermediate stabilization device 31.
    Referring to Figure 3, a brake lining 38b is provided for the lower portion of each of the brake application members 38. The brake lining 38b is shaped to assume an arcuate configuration which corresponds to that of the brake lining. portion 31a of the intermediate stabilization device 31, having an arcuate configuration, in such a way that the brake lining 38b is allowed to come into contact with the corresponding intermediate stabilization device 31. The brake lining 38b is made from leather. Instead of leather, the brake lining 38b can be made, for example, from a resin-based material. Springs 380 are disposed between the top panel 34b and the brake application elements 38. Each of the springs 38a exerts a downward pressure on the associated brake application element 38. In other words, each of the springs 380 compresses the associated brake lining 38b in a direction in which the brake lining 38b contacts the periphery of the corresponding intermediate stabilizer 31 and exerts pressure on said periphery. The spring 38a corresponds to a compression element, while the brake application element 38 and the brake lining 38b correspond to a brake application element of the present invention.
    The operation of the loom frame braking apparatus of the loom in accordance with the embodiment of the present invention will now be described.
    When current is supplied to drive the motors 43 as shown in Figure 1, the pneumatic cylinder 35 is driven to pull the rod 38 inward in a direction λ as shown in Figure 3. This action will cause the brake levers 37 pivot in the upward direction and the brake application elements 38 are subjected to displacement in the upward direction, i.e. in a direction B, against the compressive forces springs 38a which act in the downward direction, in such a way that the brake linings 38b separate from the portions 31a of the corresponding intermediate stabilizers 31, having an arcuate configuration.
    When the brake linings 38b are separated from the portions 31a of the corresponding intermediate stabilizers 31, having an arcuate configuration, the brakes do not apply to the intermediate stabilizers 31. In this state, the tie rods 30 can oscillate freely, as illustrated in Figure 1. The motors 43 drive the levers 42 and the driven levers 42 subject the tie rods 30 to oscillations.
    The driven blade tie rods 30 individually drive the heddle frames 21 in a vertical direction.
    When current is not supplied to drive the motors 43 in cases where a mains power supply to the loom is interrupted, a power failure is encountered, which causes a failure in the power supply system of the loom. electricity of the motors 43, so that the pneumatic cylinder 35 does not pull the rod 36 inwards, so that the rod 36 is pushed outwards in a direction C as shown in FIG. 4. we have just stated will cause the brake levers 37 to pivot in the downward direction and that the brake application elements 38 are subjected to a movement in the downward direction, that is to say in a direction D, by the force of gravity and under the effect of the compressive forces of the springs 380 which are exerted in the downward direction. By the fact that the brake linings 38b come into contact with the portions 31a of the intermediate stabilization devices 31, having an arcuate configuration, and exert pressure on said portions, the braking is applied to the intermediate stabilization devices 31 The intermediate stabilizing devices 31 on which the brakes are applied act like brakes on the heddle frames 21 in such a way that the drive of the heddle frames 21 stops.
    The brake apparatus 32 of the heddle frames 21 in the embodiment described above applies the brakes directly to the heddle frames 21 when the current is not supplied to drive the motors 43, this which prevents the entrainment of the heddle frames 21 or their getting out of control, and which consequently prevents degradation of the heddle frames 21 and the warp threads.
    Generally speaking, a side support of the beam frame 21 is thinner than the blade arm 30 and therefore when the side support is compressed by a brake shoe, a large load is placed on the beam frame 21. Therefore, the stringer frame has to withstand a relatively large load in the conventional braking apparatus which applies braking to the stringer frame by compressing the brake shoe against the side support of the stringer frame.
    On the other hand, in the case of the braking apparatus 32 of the embodiment described above, the intermediate stabilization device 31, which is provided for the relatively thick blade tie rod 30, is used to act as an element on which the braking is applied.
    Further, the intermediate stabilization device 31 which is used for the braking apparatus 32 of the embodiment described above has a large dimension compared to that of an intermediate stabilization device. that is expected for conventional looms.
    Since the beam frame 21 is not subjected to direct compression, the load that the beam frame 21 must bear when braking is applied is small compared to that in force in the conventional braking device. .
    Since the intermediate stabilization device 31 is large enough to have sufficient contact area between the intermediate stabilization device 31 and the brake lining 38b, a stable and intense braking force is obtained when the braking is applied on the beam frame 21.
    Each of the brake linings 380 of the elements 38 of the braking apparatus 32, to which the braking is applied, in the embodiment described above comes into contact | with the corresponding intermediate stabilization device 31 and exert pressure on the device in question from above.
    Therefore, the load to be carried by the blade tie rod 30 is reduced compared to that in a conventional method of applying braking, in which braking is applied by maintaining compression of all the blade tie rods. in one direction of thickness.
    A number of conventional heald frame braking devices have a configuration in which an electromagnetic de-energized brake which is used as a braking device is provided for each motor which drives each of said plural heald frames.
    In contrast, the braking apparatus 32 of the embodiment described above has the single pneumatic cylinder 35 which is configured to simultaneously engage all of the brake application elements 38 which correspond to the same. all of the intermediate stabilizers 31. Since the braking apparatus 32 of the above-described embodiment uses only the single air cylinder 35 without using several expensive electromagnetic brakes of the off-mode type. voltage, a simple and inexpensive configuration can be obtained.
    Further, since the pneumatic cylinder 35 can be driven by the air existing in the installation, an introduction of the braking apparatus 32 of the embodiment described above is easy.
    The braking apparatus 32 of the heald frame of the loom of the above-described embodiment includes the motors 43 which are configured to drive said plural heald frames 21, the blade tie rods 30 which are configured to convert into driving forces of the motors 43 to transmit the converted driving forces to the heddle frames 21 and which include the intermediate stabilizing devices 31, respectively, as well as a brake application mechanism which is configured to apply the brakes to the intermediate stabilizers 31. The intermediate stabilizers 31 include the portions 3a having an arcuate configuration, respectively, and can pivot about the common shaft 33. The brake application mechanism includes the brake application elements 38 and the brake linings 38b which are configured to exert pressure on the ports ions 31a from the intermediate stabilizers 31, having an arcuate shape configuration, respectively.
    The brake application elements 38 exert pressure on the portions 31a having an arcuate configuration in order to apply the brakes to the heddle frames 21, respectively, which makes it possible to provide for the braking apparatus 32 a simple structure and reduce the loads to be supported by the heddle frames 21 during the application of the brakes on the heddle frames 21.
    During the application of the brakes on the heddle frames 21, all of the brake application elements 38 come into contact with the portions 3a of the corresponding intermediate stabilization devices 31, having an arcuate configuration, which allows to provide for the braking device 32 a simple structure and a reasonable cost. The elements on which a braking is applied represent the intermediate stabilization devices 31 of the tie rods 30 to which the configuration of the existing electronic apparatus 1 for forming the pitch or lifting the warp threads can be applied. Therefore, this characteristic makes it possible to envisage an inexpensive production of the electronic apparatus 1 for lifting the warp threads.
    The brakes are applied to the heald frames 21 when the power supply to the motors 43 is interrupted, which prevents the heddle frames 21 from being driven or out of control, and which consequently prevents degradation of the heddle frames. heddles 21 and warp threads.
    The brake application mechanism includes, in addition to the brake application elements 38 and the brake linings 38b, the air cylinder 35 and the springs 38a which are configured to compress the brake application elements 38 and the linings. of brakes 38b against the intermediate stabilization devices 31. The brake application elements 38 driven by the pneumatic cylinder 35 are switchable between the state in which the brake application elements 38 are separated from the intermediate stabilization devices 31, respectively, and the state in which the brake application elements 38 are compressed against the intermediate stabilizers 31 through the compressive forces of the springs 380, respectively. This characteristic makes it possible to envisage for the braking apparatus 32 a simple structure and of reasonable cost without having to use a large number of expensive electromagnetic brakes of the type in de-energized mode.
    In the embodiment which has been described above, the brakes are applied to the heddle frames 21 by applying the brakes to the intermediate stabilizing devices 31 of the tie rods 30. However, the brakes can be applied to the trants. blades 30 and on the heddle frames 21 by bringing the brake application elements into contact with the portions 41a having an arcuate configuration and compressing the elements in question against the peripheral portions of the levers 41, or the portions 420 having a configuration of arcuate shape against the peripheral portions of the levers 42, in place of the intermediate stabilization devices 31. In such a case, the elements on which the braking is applied represent the levers 41 or 42 of the tie rods of blades 30, to which the configurations of the existing blade tie rods 30 can be applied. e production of the electronic device 1 for lifting the warp threads.
    In the embodiment which has been described above, the brake application elements 38 are driven in the vertical direction by the pneumatic cylinder 35. However, the brake application mechanism may include, in addition to the elements of brake application 38 and brake linings 38b, an electromagnetic drive device driven by electromagnetic force, such as a solenoid, and springs 38a which are configured to compress the brake application elements 38 and linings of brakes 38b against the intermediate stabilizers 31. The brake application elements 38 driven by the electromagnetic drive device can be switched between the state in which the brake application elements 38 are separated from the stabilization devices. intermediate 31, respectively, and the stay in which the brake application elements 38 are compressed against the devices of s intermediate stabilization 31 via the compressive forces of the springs 380, respectively.
    The brake application elements 38 may be driven, for example, by means of hydraulic pressure, in place of the pneumatic cylinder 35. As described above, various mechanisms for driving the brakes. Brake application elements 38 can be applied as appropriate.
    In the embodiment which has been described above, all of the brake application elements 38 are set in motion simultaneously through the pneumatic cylinder 35. However, a portion of the brake application elements 38 may be fixed by providing a mechanism which is configured to individually secure the brake application members 38. By securing a portion of the brake application members 38 in advance, the brakes can be applied to the portion. corresponding intermediate stabilization devices 31, by which the brakes are applied to the corresponding part of the heddle frames 21. This feature allows the brake application elements 38 to apply the brakes to only, for example, six heddle frames. 21 which are intended to be driven among the sixteen heddle frames 21. In other words, the brake application elements 38 can apply the f reinforcements only on a predetermined number of the heddle frames 21. In the embodiment which has been described above, the electronic apparatus 1 for lifting the warp threads uses the motors 43 as drive units for driving the chains. tie rods 30, levers 41 and levers 42. However, other drive units such as a cam mechanism can be used instead for driving the tie rods 30, levers 41 and levers 42. In addition, the apparatus intended for driving the heddle frames 21 is not limited to the electronic apparatus 1 for lifting the warp threads.
    Instead, the heddle frames 21 may be driven by a known shed-forming mechanism, such as shed-forming using a cam.
    权利要求:
    Claims (7)
    [1]
    1. Braking device (32) of a heddle frame of a loom,: comprising: | 5 a drive unit (43} configured to drive a number of heald frames (21); | a number of pitch forming systems {30, 41, 42} | configured to convert a drive force of the drive unit [43] for the purpose of transmitting the converted drive force to the respective heald frames (21), the pitch forming systems (30, 41, 42} comprising a number of elements | (31, 41, 42) to which braking is applied, | respectively; and | a brake application mechanism (35, 38, 380, 38b] configured to apply brakes to the elements (31, 41, 42 ) on which a braking is applied, characterized in that the elements (31, 41, 42) on which a braking is applied include portions {31a, 41a, 42a} having an arcuate configuration, respectively, and are capable of pivoting about a common pivot shaft (33); the brake application mechanism (35, 38, 38a, 38b)} includes a number of brake application elements (38, 38b} which are configured to exert pressure on the portions (310, 41a, 420} of the elements (31, 41, 42} on which braking is applied, having an arcuate shape configuration, respectively, and at least part of the brake application elements (38, 38b) is configured to exert pressure on the portions (31a,
    [2]
    Alo, 420} having an arcuate configuration for the purpose of applying the brakes to the heddle frames (21}, respectively. | 2. Braking apparatus {32) of the heddle frame of a loom according to Claim 1, characterized in that all of the brake application elements (38, 38h) exert pressure on the portions (31a, 414, 42a} having an arcuate configuration by applying the brakes to the heddle frames ( 21), respectively.
    [3]
    ; 3. Braking apparatus (32) of the heddle frame of a loom 9 according to claim | or 2, characterized in that the elements (31, 41, 42) on which a braking is applied are intermediate stabilization devices {31} which form the pitch forming systems (30, 41, 42).
    [4]
    4. Braking apparatus (32) of the heddle frame of a loom according to claim 1 or 2, characterized in that the elements (31, 41, 42) on which a braking is applied are levers (41 , 42) which form the pitch formation systems (30, 41, 42).
    [5]
    5. Braking apparatus (32) of the heddle frame of a loom according to any one of claims | to 4, characterized in that said at least part of the brake application elements (38, 38b) applies the brakes to the heddle frames {21}, respectively, during a shutdown of a current supply to the drive unit (43).
    [6]
    6. Braking apparatus {32} of the heddle frame {21} of a loom according to any one of claims 1 to 5, characterized in that the brake application mechanism (35, 38, 380, 38b) includes: an air cylinder 135): and a number of compression elements (38a}, the compression elements (38a} being configured to compress said at least part of the brake application elements (38, 38b) ) against the elements (31, 41, 42) on which a brake is applied, respectively, and said at least part of the brake application elements (38, 38b} driven by the pneumatic cylinder (35) is switchable between a state in which the brake application elements (38, 38b}) are separated from the elements (31, 41, 42} to which braking is applied, respectively, and a state in which the elements (31, 41, 42) to which braking is applied are compressed by means of compressive forces of the compression elements (38a), respectively.
    [7]
    7. Braking apparatus {32} of the heddle frame of a loom according to any one of claims | to 5, characterized in that # the brake application mechanism (35, 38, 380, 380) 9 includes: | an electromagnetic drive device driven by electromagnetic force; and | a number of compression elements (38a), the compression elements {380} being configured to compress said at least part of the brake application elements (38, 380} against the elements (31, 41, 42) to which braking is applied, respectively, and said at least part of the brake application elements (38, 38b) driven by the electromagnetic drive device is switchable between a state in which the brake application elements (38, 38b} are separated from the elements (31, 41, 42) on which a braking is applied, respectively, and a state in which the elements (31, 41, 42} on which a braking is applied are compressed by through compressive forces of the compression members (38a), respectively.
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    同族专利:
    公开号 | 公开日
    CN113005593A|2021-06-22|
    JP2021095660A|2021-06-24|
    BE1027809A1|2021-06-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2082378A|1934-06-07|1937-06-01|Bradley William|Brake controlled mechanism|
    JP2003073953A|2001-08-31|2003-03-12|Tsudakoma Corp|Damping device for electric opening apparatus|
    WO2008141657A1|2007-05-18|2008-11-27|Sultex Ag|Warp shed-forming device|
    JP3353643B2|1997-04-21|2002-12-03|株式会社豊田自動織機|Brake device for loom heald frame|
    法律状态:
    2022-01-10| FG| Patent granted|Effective date: 20211124 |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2019228806A|JP2021095660A|2019-12-19|2019-12-19|Braking apparatus for loom heddle frame|
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