• 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:
    A method for manufacturing a screen installation of a greenhouse or greenhouse, comprises the steps of: - providing an edge profile with a mounting profile, - providing opposite holding means between which the screen cloth is held and which have a counter-profile, - mounting on or thread the counter-profiling of the retaining means together with the screen cloth held thereon and the fastening profile of the edge profile.
    公开号:BE1019248A3
    申请号:E2010/0160
    申请日:2010-03-12
    公开日:2012-05-08
    发明作者:Deursen Adrianus Gerardus Van；Vincent Prins；Johan Martien Broos
    申请人:Valk Systemen Bvvd；
    IPC主号:
    专利说明:

    Method for manufacturing a screen installation, as well as profiles therefor
    The invention relates to the manufacture of a screen installation of a greenhouse or department store. Such a screen installation can be used for various purposes, such as shielding the cultivation against excessive sunlight, preventing light emission, isolating the cultivation space against heat loss and the like. Different types of screen cloth are known for all these different applications. In addition, multiple screens can occur simultaneously. Both arrangements above one another and side by side are known. Furthermore, the screen installation can be located in the greenhouse; however, a position on the deck of the greenhouse is also conceivable.
    Usually, the screen cloths are always attached to an edge profile on their opposite edges. This may involve an edge profile fixedly connected to the greenhouse construction or a movable edge profile, the so-called screen profile. It is also possible to use multiple side-by-side screens, mutually connected by movable edge profiles on either side of which screens are attached.
    The screens are usually fixed to the relevant edge profile by means of clamps. To this end, a person must sit on a scaffolding at a certain height, depending on the level at which the screen installation must be mounted. The clamps are then applied by hand. Since the dimensions of the greenhouse and hence of the screen installation can be considerable, the rack must be moved regularly, with the person possibly having to move away from the rack and climb on it again.
    Such a state of affairs is becoming increasingly problematic, not only because of the ever-increasing surfaces that the greenhouses cover, but also because of the increasing height. It must be borne in mind that the racks on which the person is standing cannot be supported too stably on the loose surface. In that connection it is already known not to attach the screen cloths to the edge profiles by means of clamps, but by means of a string sewn into the edge of the screen cloth. The edge with string is pulled into an undercut cavity of the edge profile, such that the screen cloth can be pulled from one end of the set of edge profiles to the other end of the set. The screen is thereby shifted along the edge profiles until the desired position is reached. The disadvantage of arranging clamps at a higher height in connection with attaching the screen to the edge profiles is thus eliminated.
    Although this method of applying a screen cloth already means a certain improvement over the traditional method, it still has disadvantages. Namely, the tendon forms a bulge on the edge of the screen cloth, which means that the screen cloth undergoes a certain friction in the undercut cavity of the edge profile which increases as the screen cloth is pulled through the edge profile over greater distances. The forces exerted on the screen and the edge profiles can therefore increase quite considerably, which entails the risk of damage and deformations. Especially due to the large size of the screen in the direction along the edge profile, these forces can be considerable.
    A further problem is that the screen can show shrinkage phenomena. However, the shrinkage that the screen undergoes differs from the possible shrinkage of the tendon, as a result of which local deformations in the screen and tendon may occur. Removing the screen cloth from the edge profiles can therefore cause problems.
    In connection with the shrinking of the screen, this must initially be applied with a certain excess. In practice, this means that the screen must not be stretched tightly between two clamps, but must have a certain amount of space. However, this is difficult to achieve: manually installing the clamps is a difficult job that is done quickly. It often turns out that it is then not feasible to arrange the space in the screen canvas evenly over the length of the profiles, as a result of which there is hardly any space in the screen at certain places, and too much at other places.
    Moreover, the screen cloth is not well protected against any roughness that may be present on the edge profiles. One can think of the transitions on the head edges of edge profiles that are in line with each other; the screen can snag and tear when shifting along the edge profiles.
    The object of the invention is therefore to provide a method for applying a screen installation to a greenhouse which can also be efficiently carried out at greater heights and wherein the screen cloth can be applied in a reliable manner, well protected against damage. Moreover, it is desirable to apply the screen cloth without having to take into account the regular distribution of the excess in connection with the subsequent shrinkage. This object is achieved by means of a method for manufacturing a screen installation of a greenhouse or greenhouse, comprising the steps of: - providing an edge profile with a fixing profile, - providing opposite retaining means between which the screen cloth is retained and which have counter-profiling, - threading on or into each other of the counter-profiling of the retaining profile with the screen cloth held thereon and the fastening profile of the edge profile.
    In the method according to the invention, no tendons are provided on the edge of the screen cloth, but retaining means. The screen cloth is moreover included between said retaining means, such that the screen cloth is surrounded by said retaining means at the edges located near the profiles. Such retaining means offer several advantages compared to a tendon. First of all, the retaining means can be designed such that they offer protection to the screen cloth when it is displaced along the associated edge profile. The sliding forces now occur in the contact between the edge profile and the retaining means, such that the screen cloth itself remains free of such forces. The relevant retaining means and profiles can be designed in such a way, for example by a suitable choice of material, that any roughness or unevenness has no influence on the quality of the screen fabric. The risk of this being damaged can therefore be largely avoided. The functions of the screen fabric, in particular the light-resistant effect and the like thereof, can therefore also be maintained without problem.
    The retaining means can be designed in various ways.
    According to a first possibility, the retaining means can be designed as a single retaining profile. Such a single retaining profile can be formed in various ways and connected to the screen cloth. Thus, a basic profile can be assumed that is bent or folded over until the retaining profile is obtained. The screen cloth can then be slid into the retaining profile thus created, preferably with the formation of a fold therein. However, a method comprising the steps of: - placing the base profile and the screen cloth on top of each other, - subsequently folding or bending the base profile and folding the screen cloth simultaneously, is preferred.
    The folding over or bending of the basic profile into the retaining profile must take place in such a way that sufficient space is available in the retaining profile for receiving the (possibly folded) screen cloth. This can be achieved by means of the steps of: - providing a base profile provided with at least one longitudinally extending nominal fold line or bend line, such as a locally thinner area, - folding or bending the base profile according to said at least one nominal fold line or bend line.
    The folding or bending of the basic profile according to said at least one nominal folding line or bending line preferably takes place through 180 degrees.
    Further, in that connection, the method may comprise the steps of: - providing the base profile provided with at least two longitudinally extending, mutually parallel nominal fold lines or bend lines, - folding or bending the base profile according to those two nominal fold lines or bend lines.
    The folding or bending of the basic profile takes place about 90 degrees along each of those two folding lines or bending lines.
    The shape of the base profile, and therefore of the retaining profile, is matched to the shape of the edge profile, in particular the mounting profile thereof. According to one of the possibilities, the method according to the invention comprises the steps of: - providing a basic profile that is more or less symmetrical with respect to the folding area or bending area, - covering both of the more or less symmetrical halves of the basic profile forming the retention profile.
    However, it is also possible to use a completely asymmetrical basic profile.
    As already mentioned, the edge profile and the retaining profile have a fixing profile or a counter-profile, by means of which they can be slid onto each other in the longitudinal direction, such that a connection is created between the edge profile and the screen cloth along the length of these profiles. A possible fixing profile of the edge profile is a bead that extends in the longitudinal direction. In that case the retaining profile has an undercut cavity that can be slid along and over the beaded edge. However, preference is given to the variant comprising the steps of: - providing an edge profile whose fixing profile comprises an undercut cavity, - providing a basic profile comprising an essentially flat strip and protrusions located on either side of the folding area or bending area on the same surface of the flat strip, projecting those protrusions on opposite sides of the retaining profile, sliding the retaining profile into the undercut cavity of the edge profile.
    The protrusions on either side of the retaining profile ensure that the retaining profile cannot be slid transversely of the edge profile. They block that movement, while sliding the profiles along each other in the longitudinal direction is possible.
    The screen can be attached to the retaining profile in many different ways, such as by clamping it between the folded or bent parts thereof. It is also possible to glue the screen to the retaining profile. However, preference is given to the step of: - securing the screen cloth in the holding profile by applying pressed-through or punched areas in superimposed parts of the holding profile between which the screen cloth is situated.
    As already discussed above, the screen can shrink. Often the screen will shrink to a degree different from that of the retaining profile. In order to prevent undesired stresses and deformations occurring in the screen and the edge profile, the method according to the invention preferably comprises the step of: - removing parts of the basic profile at regular mutual distances, such as by punching, forming basic elements which are mutually connected by the opposite strips, - that, when folding or bending the basic profile, cover one another of the initially opposite strips, - forming retaining elements when folding or bending the basic elements.
    The basic elements thus formed are interconnected by strips which, to a lesser extent, give rise to stresses and deformations due to shrinkage differences. The deformation thereof already occurs at considerably lower forces than is the case with the full section of the basic profile. A further advantage of the basic elements is that the total friction that occurs during the displacement of the retaining profile along the edge profile is smaller than with an edge profile with a continuous cross-section along its length.
    The deformability of the strips can be further improved by the step of: forming elastic hinges in the strips, which hinges allow a rotation transversely to the longitudinal direction of the strips. These hinges are preferably shifted in superimposed strips relative to each other in the longitudinal direction, such that when the strips deflect under shrinkage of the screen cloth, jamming of the retaining profile in the undercut cavity of the edge profile can be avoided.
    Retaining means are described in the foregoing which are designed as a single retaining profile. However, the retaining means can also be designed in other ways. Thus, the method according to the invention may alternatively comprise the steps of: - providing two opposite retaining profile parts, - securing the retaining profile parts together with the screen cloth between them.
    The invention further relates to a screen installation for a greenhouse or greenhouse, comprising a screen cloth with retaining means on both longitudinal edges, for example a retaining profile or opposite retaining profile parts as described above, as well as edge profiles provided on the greenhouse construction in which retaining means are each incorporated. Preferably, each edge profile comprises an undercut cavity, the retaining means protruding from the undercut cavity.
    This undercut cavity has an opening which is defined on one side by facing dams and on the opposite side by a closed wall, the distance between the opening and the wall being at most equal to the corresponding dimension of the retaining means.
    The invention further relates to a basic profile for use in the method according to the invention, provided with at least one substantially flat strip with a longitudinally extending fold line or bending line and projections on either side of the folding area or bending area on the same surface of the flat surface. strip.
    The invention also relates to a retaining profile obtained by means of the method according to the invention, comprising a strip which is folded or bent in a longitudinal direction extending or bent, with strip parts extending next to each other, as well as protrusions provided on the surfaces of the strip parts facing away from each other .
    The invention will subsequently be elucidated with reference to an exemplary embodiment shown in the figures.
    Figure 1 shows a perspective view of a greenhouse with a screen installation according to the invention.
    Figure 2 shows a perspective view of the greenhouse during the application of a screen cloth.
    Figure 3 shows the screen with retaining profile and partially removed edge profile.
    Figure 4 shows the section according to IV-IV of Figure 3.
    Figure 5 shows the section according to V-V of Figure 4.
    Figure 6 shows the section according to VI-VI of Figure 4.
    Figure 7 shows a basic profile for use in the method according to the invention.
    Figure 8 shows the section according to VIII-VIII of Figure 7.
    Figure 9 shows in detail a retaining element according to the view IX of figure 3.
    The greenhouse shown in Figure 1 comprises a number of columns 1 on which trusses 2 are supported. The roof construction is supported on these trusses 2. This cap construction consists of the troughs 3 as well as the rods 4 which are inclined upwards with respect to the troughs 3. Furthermore, the hood construction consists of the cams 5 supported on the rods 4, as well as the glass plates 6 which between the rods 4, troughs 3 and cams 5 are included.
    The screen installation 13 according to the invention is located at the level of the trusses 2. This screen installation consists, as usual, of a number of screen cloths 7, one end of which is each connected to the fixed profile 18 which is attached to the underlying beams or supporting beams 14 that form part of the trusses 2. The other end of the screen cloths 7 is connected to the screen profiles 8 which can be moved back and forth between two trusses 2 in a known manner For this purpose the screen profiles 8 are connected to the wire-shaped drive 16 by means of per se known couplings 15. By means of this drive 16 the screen cloths 7 can be transferred between a closed and an open position; Figure 1 shows an intermediate position. Furthermore, the screen cloths 7 are supported by wires 17 against sagging. In addition, wires (not shown) may be provided above the screen cloths in order to prevent them from blowing up.
    Figure 2 shows the manner in which the screen cloths 7 are arranged along the fixed profiles 18 and the screen profiles 8. At the same time, the fastening between the screen cloths and the profiles is effected, as will be explained below. An installation 23 is used for this, consisting of a carriage 10 on which a roll 11 with the rolled up screen cloth 7 is placed. The carriage 10 has wheels 12, such that it can be moved over, for example, the heating pipes 9 or other rails located on the floor in the greenhouse. The carriage 10 can thus be placed at each pair of trusses 2. By means of the pulling device 29, the screen cloth 7 with the retaining profiles 20 attached thereto is drawn into the edge profiles 8, 18.
    Before applying the screen 7, the relevant screen profile 8 is shifted against the lower beam 14, which is opposite the lower beam 14 to which the fixed profile is attached. Parts 30 are removed from said profiles 8, 18 such that the transfer profiles 27, 28 can be arranged.
    These transfer profiles comprise a curved transfer profile 28, which is placed in the space created by removing the parts 30. This transfer profile 28 has an undercut cavity which corresponds to the undercut cavity of the profiles 8,18 as shown in the cross-section according to figure 4 (opposite profiles are mirror image positioned).
    A slanted, straight transfer profile 27 is connected to each curved transfer profile. These transfer profiles 27 extend obliquely downwards to the carriage 10, near the roller 11. At the bottom of each obliquely placed profile 27, the basic profile 19 shown in Figure 7 is supplied. That basic profile 19, the cross-section of which is shown in Figure 8, is obtained by punching holes 42 or arranging them in another way. The base profile 19 consists of the strip 32, on one side of which the protrusions 33 are located: see also figure 8. In the middle of the base profile 19 there is an outer area 22, as will be explained later. Strips 36 have been created by removing the parts and forming the holes 42. As a result, the basic elements 35 are connected to each other. These basic elements 35 each consist of two more or less symmetrical halves 25.
    The screen cloth 7 is placed on the base profile 19 thus formed. Subsequently, the base profile 19 is folded or bent around the area 22, whereby the retaining profile 20 shown in cross-section in figure 4 is formed. Between the more or less symmetrical halves 25 thereof, the screen cloth 7 is pleated and secured. This fixing is further facilitated by the provision of the depressions 34, as shown in figures 3-5.
    As shown in Fig. 4, the edge profile 8, 18 has a fixing profile 21, which is formed by the internal boundary of the undercut cavity 26 and which includes, inter alia, the dams 38 and the opening 31 defined therebetween. The retaining profile has a counter-profiling 24 that is aligned with said fastening profiling 21 and which includes the protrusions 33. However, other forms of the fixing profile and the retaining profile are also possible, such as a bead on the edge profile and a profile with undercut cavity that grips around the bead edge. It can further be seen that the strips 36 of the retaining profile 20 are located at the level of the opening 31, through which the undercut cavity 26 opens outwards. In particular, the strips 36 are located between the facing walls 38 of the edge profile 8, 18. Opposite the opening 31 is the closed wall 39. The distance between this closed wall 39 and the opening 31 is chosen such that the strips 36 are opposite the surfaces of the dams 38 facing each other. The position of the projections 33 in the undercut cavity 26 also contributes to this. The closed wall 39 furthermore has a bearing 40 for the retaining profile 20. The advantage of this embodiment is that the screen cloth 7 is well protected against contact with the retaining profile 20, in particular the dams 38 which, at the location of transitions between different pieces of retaining profile 20 could otherwise lead to damage to the screen 7.
    The strips 36 are provided with elastic hinges 41 in the form of a local constriction. Under the influence of any differences in stretch between the screen cloth 7 and the retaining profile 20, these hinges 41 can cause a shortening of the strips 36, as a result of which excessive stresses can be avoided.
    The detail of Figure 9 shows a ready holding element 37 with strips 36 connected thereto, obtained by bending a base element 35 with strips 36 connected thereto. The halves 45, 46 of the base element 35 come to lie on top of each other in the holding element 37, but are not exactly congruent in this version. The point shapes of half 46 extend somewhat into half 45 with the sloping edge 43, while this half 45 has a longitudinal notch 44 which connects to the sloping edge 43. As can be seen in Figure 9, the boundary of the retaining element at the level of the bending line 22 thereby an oblique end. The advantage of this is that that end does not run the risk of getting caught behind transitions between the various profiles along which the retaining elements with the screen cloth 7 fixed therein (shown with broken lines) are drawn.
    List of the reference signs 1. Column 2. Truss 3. Gutter 4. Rod 5. Ridge 6. Glass plate 7. Screen cloth 8. Screen profile 9. Heating tube or rail 10. Carriage 11. Roll with screen cloth 12. Wheel 13. Screen installation 14. Support beam or support 15. Coupling 16. Wire-shaped drive 17. Supporting wire 18. Fixed profile 19. Base profile 20. Retaining profile 21. Fixing profile 22. Bending area or folding area basic profile 23. Fixing installation 24. Counter-profile retaining profile 25. Half basic profile 26. Undercut hollow edge profile 27. Straight transfer profile 28. Curved transfer profile 29. Pulling device 30. Break in profiles 8, 18 31. Slot edge profile 32. Strip basic profile 3 3. Expansion basic profile 34. Push-through 35. Basic element 36. Strip 37. Retaining element 38. Dam 39. Closed wall 40 Overlay 41. Elastic hinge in strip 42. Opening in basic profile 43. Angled edge of half 46 44. Notch in longitudinal direction of half 45 45. Half of basic element 46. H shad of basic element
    权利要求:
    Claims (24)
    [1]
    Method for manufacturing a screen installation of a greenhouse or greenhouse, comprising the steps of: - providing an edge profile (8, 18) with a mounting profile (21), - providing opposite retaining means (20) between which the screen cloth (7) is retained and which has a counter-profiling (24), - threading on or into each other the counter-profiling (24) of the retaining means (20) with the screen cloth (7) held thereon and the mounting profiling (21) of the edge profile (8, 18).
    [2]
    Method according to claim 1, comprising the steps of: - providing a base profile (19), - folding or bending according to a folding area or bending area (22) extending in the longitudinal direction of said base profile (19) the base profile forming retaining means in the form of a retaining profile (20).
    [3]
    Method according to claim 2, comprising the steps of: - placing the base profile (19) and the screen cloth (7) on top of each other, - subsequently folding or bending the base profile (19) and folding the screen cloth (simultaneously) 7).
    [4]
    Method as claimed in claim 2 or 3, comprising the steps of: - providing a basic profile (19) provided with at least one longitudinally extending nominal folding line or bending line (22), such as a locally thinner area, - folding or bending of the base profile (19) according to said at least one nominal fold line or bend line (22).
    [5]
    Method according to claim 4, comprising the step of: - folding or bending the base profile (19) through 180 degrees according to said at least one nominal folding line or bending line (22).
    [6]
    A method according to any one of claims 2-5, comprising the steps of: - providing the basic profile (19) provided with at least two longitudinally extending, mutually parallel nominal folding lines or bending lines (22), - folding or bending the base profile (19) according to those two nominal fold lines or bend lines (22).
    [7]
    Method according to claim 6, comprising the step of: - folding or bending the base profile (19) by about 90 degrees according to each of said two folding lines or bending lines (22).
    [8]
    A method according to any one of claims 2-7, comprising the steps of: - providing a base profile (19) that is more or less symmetrical with respect to the folding area or bending area (22), - covering both halves of one another (25) of the base profile (19) forming the retaining profile (20).
    [9]
    A method according to any one of claims 2-8, comprising the steps of: - providing an edge profile (8, 18) whose mounting profile comprises an undercut cavity (26) which opens into a slot (31), - providing a base profile (19) comprising a substantially flat strip (32) as well as protrusions (33) located on either side of the folding area or bending area (22) on the same surface of the flat strip (32), causing said protrusions to protrude (33) on opposite sides of the retaining profile (20) such that the thickness of the retaining profile as determined by the protrusions is greater than the width of the slot (31), - sliding the retaining profile (20) into the undercut cavity ( 26) of the edge profile (8, 18) with the screen cloth (7) and / or the retaining profile (20) protruding through the slot (31).
    [10]
    A method according to any of claims 2-9, comprising the step of: - removing parts (42) from the basic profile, such as by punching, at regular mutual distances, forming basic elements (35) interconnected by opposite strips (36), covering the initially opposite strips (36) when folding or bending the base profile (19), forming retaining elements (37) when folding or bending the base members (35).
    [11]
    A method according to claim 10, comprising the step of: forming elastic hinges (41) in the strips (36), which hinges (41) permit a rotation transversely of the longitudinal direction of the strips (36).
    [12]
    The method of claim 1, comprising the steps of: - providing two opposite retaining profile members, - securing the retaining profile members together with the screen cloth between them.
    [13]
    A method according to any one of the preceding claims, comprising the step of: - securing the screen cloth (7) in the opposite retaining means (20) by arranging pressed-through or punched areas (34) in superimposed parts (25) of the retaining means (20) between which the screen cloth (7) is situated.
    [14]
    A method according to any one of the preceding claims, comprising the step of: - threading onto or in each other the counter-profiling (24) of the retaining means (20) and the fastening profiling (21) of the edge profile (8, 18) by the retaining means and shifting the edge profile in the longitudinal direction relative to each other.
    [15]
    Screen installation (13) for a greenhouse or department store, comprising a screen cloth (7) with retaining means (20) manufactured on both longitudinal edges according to the method according to one of the preceding claims, as well as edge profiles (8, 18) provided on the greenhouse construction of the retaining means (20).
    [16]
    The screen installation (13) according to claim 15, wherein each edge profile (8, 18) comprises an undercut cavity (26) and the retaining means (20) protrude from the undercut cavity (26).
    [17]
    The screen installation (13) according to claim 16, wherein the undercut cavity (26) has an opening (31) defined on one side by facing dams (38) and on the opposite side by a closed wall (39), wherein the distance between the opening (31) and the wall (39) is at most equal to the corresponding dimension of the retaining means (20).
    [18]
    A screen installation (13) according to claim 17, wherein the closed wall (39) is provided with a support (40) for the retaining means (20).
    [19]
    A screen installation (13) according to claim 17 or 18 manufactured according to the method according to claim 9, wherein the protrusions (33) are opposite the dams (38).
    [20]
    Basic profile (19) for use in the method according to claim 9, provided with at least one substantially flat strip (32) with a longitudinally extending folding line or bending line (22) and protrusions (located on either side of the folding area or bending area) 33) on the same surface of the flat strip.
    [21]
    Holding profile (20) obtained by means of the method according to claim 9, comprising a strip (32) folded or bent (32) folded along a longitudinal direction or bending line (22) with strip parts (36, 45, 46) extending next to each other and projections (33) provided on the surfaces of the strip parts facing away from each other.
    [22]
    Holding profile (20) according to claim 21, comprising holding elements (37) connected two by two by strips (36) located on top of each other.
    [23]
    The retaining profile of claim 22, wherein the retaining elements (37) have tapered ends facing each other.
    [24]
    A retaining profile according to claim 23, wherein the retaining elements (37) comprise halves (45, 46) lying on top of each other, and the oblique edge (43) of one half (46) extends beyond the bend line or fold line (22) to the other half (45), which other half (45) has a notch (44) connecting to said sloping edge (43).
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    NL1011546C2|1999-03-12|2000-09-14|Holland Scherming B V|Screen construction for warehouse, has snap fit fastener with lip on one edge of screen cooperating with profile|DE202011103187U1|2011-07-06|2012-10-11|Novavert Gmbh & Co. Kg|Umbrella device for a greenhouse|
    CN103733917B|2014-01-21|2015-04-29|苗波|Fixing device for greenhouse heat preservation quilt|
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    NL2016892B1|2016-06-03|2018-01-12|Metaal En Kunststoffen Ind Snelder B V|SCREEN DEVICE FOR A WAREHOUSE|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    NL2002621|2009-03-13|
    NL2002621A|NL2002621C2|2009-03-13|2009-03-13|METHOD FOR MANUFACTURING A SCREEN INSTALLATION AND PROFILES THEREFOR|
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