Pin plate film stretching fixture

Abstract

The utility model discloses a needle plate type film stretching clamp, and the side of clamp main body is vertical side plate, and the other side of clamp main body is the top plate and bottom plate that extend out from the upper and lower ends of side plate, a needle plate is arranged on the upper surface of the side of clamp main body close to side plate, a chain link shaft is arranged between the top plate and bottom plate of the side of clamp main body close to side plate, a top guide wheel, an outside upper guide wheel and an inside upper guide wheel are arranged on the top plate, and an outside lower guide wheel and an inside lower guide wheel are arranged on the bottom plate, the top guide wheel is located above the guide rail space, the outside upper guide wheel and the inside upper guide wheel are respectively located on both sides of the upper end of guide rail space, and the outside lower guide wheel and the inside lower guide wheel are respectively located on both sides of the lower end of guide rail space. The utility model can play a good fixing effect to various thicknesses of films, and the edge part to be cut is less, and the clamp along the guide rail operation stability is further ensured, and the problem that the film stretching quality is influenced due to the inclination or shaking of clamp in the moving process is avoided.

Description

Technical Field

[0001] This utility model belongs to the technical field of film stretching equipment, specifically relating to a needle plate type film stretching fixture. Background Technology

[0002] In film stretching equipment, such as cross-stretching machines, numerous clamps are distributed along a chain to secure the film's edges. As the chain moves, the clamps move along guide rails (also known as guide plates), conveying the film accordingly. The distance between the guide rails on both sides of the film is adjustable, allowing the film to stretch and shrink under the clamps' hold. After cross-stretching, the clamps release the film and cut off the clamped portions at the film's edges to obtain a uniform film. Existing film stretching clamps use clips to hold the film. Due to cooling and shrinkage, the film's edges tend to be thicker or form layers, leading to difficulties or failures in clamping with existing clamps, and requiring the removal of a significant portion of the film's edges. Furthermore, for thinner films, the clamps are prone to breaking them, hindering continuous production. In addition, the connection and coordination between the clamps and the guide rails, chains, and sprockets are crucial. Some existing equipment exhibits unstable clamp movement, resulting in uneven and unsatisfactory stretching effects. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a needle plate type film stretching fixture, which solves the problems of existing technology that require cutting off more film, resulting in cost waste, and the unsatisfactory holding and stretching effect of film.

[0004] According to the technical solution of this utility model, this utility model provides a needle plate type film stretching fixture, including a fixture body, one side of the fixture body is a vertical side plate, and the other side of the fixture body is a top plate and a bottom plate extending laterally from the upper and lower ends of the side plate; a needle plate is provided on the upper surface of the fixture body near the side plate, and the needle plate is provided with needles with their tips pointing upwards or diagonally upwards; a chain link shaft is provided between the top plate and the bottom plate on the side of the fixture body near the side plate; a top guide wheel, an outer upper guide wheel, and an inner upper guide wheel are provided on the top plate, and an outer lower guide wheel and an inner lower guide wheel are provided on the bottom plate; the top guide wheel, the outer upper guide wheel, the inner upper guide wheel, the outer lower guide wheel, and the inner lower guide wheel form a guide rail space that matches the cross-section of the guide rail, and the guide rail space is located on the side of the chain link shaft away from the side plate; the top guide wheel is located above the guide rail space, the outer upper guide wheel and the inner upper guide wheel are respectively located on both sides of the upper end of the guide rail space, and the outer lower guide wheel and the inner lower guide wheel are respectively located on both sides of the lower end of the guide rail space.

[0005] In some implementations, the rotation axis of the top guide wheel is horizontal, while the rotation axis of the outer upper guide wheel, inner upper guide wheel, outer lower guide wheel, and inner lower guide wheel are all vertical.

[0006] In some embodiments, a vertical plate is formed above the top plate, a top guide wheel is rotatably connected to one side of the plate, and a clearance hole is formed below the top guide wheel in the top plate to allow the top guide wheel to protrude below the top plate.

[0007] In some implementations, at least one of the outer upper guide wheel and the outer lower guide wheel is two or more arranged side by side.

[0008] In some implementations, there is one top guide wheel centered in the center, two outer upper guide wheels arranged side by side, one inner upper guide wheel centered in the center, one outer lower guide wheel centered in the center, and one inner lower guide wheel centered in the center.

[0009] In some embodiments, the edge region of the needle plate away from the guide rail space is the needle distribution region, and the needles on the needle plate are distributed in at least two rows in the width direction of the needle distribution region, with each row of needles distributed in the length direction of the needle distribution region.

[0010] In some embodiments, multiple needle plate through holes are also distributed in the needle distribution area.

[0011] In some embodiments, the fixture body is formed by connecting an upper structural member and a lower structural member; the lower structural member forms the side plate and bottom plate of the fixture body, and the lower structural member also forms a transverse connecting plate located at the upper end of the side plate; the upper structural member is connected to the connecting plate to jointly form the top plate of the fixture body.

[0012] In some implementations, the upper end of the link shaft is connected to the connecting plate, and the lower end of the link shaft is connected to the base plate. The lower structural member and the link shaft constitute the outer link of the chain.

[0013] In some implementations, two or more link shafts are provided on a lower structural member, with an intervening space between adjacent link shafts where no other components are present.

[0014] Compared with the prior art, the beneficial technical effects of this utility model are as follows: This utility model's needle-plate type film stretching fixture uses a needle plate method to penetrate and fix the edge of the film, providing excellent fixation for films of various thicknesses. This solution is particularly suitable for high-end film products with large widths. Furthermore, the needle-plate fixing method reduces the amount of edge material that needs to be removed during stretching, helping to save costs. In addition, this utility model has corresponding guide wheels on both sides of the upper and lower ends of the guide rail, as well as on the top surface, ensuring stable operation of the fixture along the guide rail and avoiding problems caused by tilting or shaking during movement that could affect the film stretching quality. More preferably, the main structure of this utility model's fixture is simplified, directly forming the outer link of the chain, i.e., becoming part of the chain. Therefore, there are no additional structural components for connecting and fixing with ordinary chains, and the chain links are free from any possible obstructions, allowing the chain to cooperate more smoothly with the sprockets for transmission, further improving the stability of the fixture's movement. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure provided by this utility model.

[0016] Figure 2 This is a three-dimensional structural diagram provided by this utility model.

[0017] Figure 3 This is a top view structural diagram of the present invention.

[0018] Figure 4 This is a three-dimensional structural diagram from another angle provided by this utility model.

[0019] Figure 5 This is a cross-sectional structural diagram provided by this utility model.

[0020] Figure 6 This is a three-dimensional structural diagram of the clamp after the inner section is installed, provided by this utility model.

[0021] Figure 7 This is a three-dimensional structural diagram of the chain formed by multiple clamps and chain links provided by this utility model.

[0022] Figure 8 yes Figure 7 Rear view.

[0023] Explanation of reference numerals in the attached figures: 1. Side plate; 2. Top plate; 3. Bottom plate; 4. Needle plate; 5. Chain link shaft; 6. Top guide wheel; 7. Outer upper guide wheel; 8. Inner upper guide wheel; 9. Outer lower guide wheel; 10. Inner lower guide wheel; 11. Guide rail space; 12. Needle plate through hole. Detailed Implementation

[0024] This invention provides a needle-plate type film stretching fixture, which solves the problems of existing technologies that require the removal of a large amount of film, resulting in cost waste, and unsatisfactory film holding and stretching effects.

[0025] Please see Figures 1 to 8 The present invention provides a needle plate type film stretching fixture, comprising a fixture body with a C-shaped cross section, a vertical side plate 1 on one side of the fixture body, and a top plate 2 and a bottom plate 3 extending laterally from the upper and lower ends of the side plate 1 on the other side of the fixture body.

[0026] A needle plate 4 is provided on the upper surface of the clamp body near the side plate 1. The needle plate 4 is provided with needles with their tips pointing upwards or diagonally upwards, so as to pierce the film for fixation.

[0027] A chain link shaft 5 is provided between the top plate 2 and the bottom plate 3 on the side of the fixture body near the side plate 1. Chain links can be fitted onto the chain link shaft 5 to form an integral chain structure.

[0028] A rotatable top guide wheel 6, an outer upper guide wheel 7, and an inner upper guide wheel 8 are provided on the top plate 2, and a rotatable outer lower guide wheel 9 and an inner lower guide wheel 10 are provided on the bottom plate 3. These guide wheels are, for example, bearings. The top guide wheel 6, outer upper guide wheel 7, inner upper guide wheel 8, outer lower guide wheel 9, and inner lower guide wheel 10 form a guide rail space 11 that matches the cross-section of the guide rail. Figure 1 (As shown by the dashed line in the middle), the guide rail space 11 is located on the side of the chain link shaft 5 away from the side plate 1.

[0029] The top guide wheel 6 is located above the guide rail space 11. The entire needle-plate type film stretching fixture will be placed on the guide rail under the action of gravity, and the top guide wheel 6 will press against the upper surface of the guide rail, forming a support, guiding, and reducing frictional resistance. The outer upper guide wheel 7 and the inner upper guide wheel 8 are located on both sides of the upper end of the guide rail space 11, and the outer lower guide wheel 9 and the inner lower guide wheel 10 are located on both sides of the lower end of the guide rail space 11. The outer upper guide wheel 7, the inner upper guide wheel 8, the outer lower guide wheel 9, and the inner lower guide wheel 10 will be in close contact with the side of the guide rail to limit and guide movement on both sides at the upper and lower ends and reduce frictional resistance.

[0030] More specifically, the rotation axis of the top guide wheel 6 is horizontal, while the rotation axes of the outer upper guide wheel 7, inner upper guide wheel 8, outer lower guide wheel 9, and inner lower guide wheel 10 are all vertical. For example, a vertical plate is formed above the top plate 2, and the plate is connected to the rest of the horizontal portion of the top plate 2 by reinforcing ribs. The top guide wheel 6 is rotatably connected to one side of the plate; specifically, for example, the plate is parallel to the side plate 1, and the rotation axis of the top guide wheel 6 is cantilevered and protrudes from the side opposite to the side plate 1, for example, through a pin in the plate. The top plate 2 has a clearance hole below the top guide wheel 6 to allow the top guide wheel 6 to protrude below the top plate 2.

[0031] Preferably, at least one of the outer upper guide wheel 7 and the outer lower guide wheel 9 is arranged in pairs (including two), thereby forming further limiting in the length direction of the guide rail and preventing the needle plate type film stretching fixture from tilting. For example, in a preferred embodiment, the top guide wheel 6 is a centrally located one, the outer upper guide wheels 7 are two arranged side by side, the inner upper guide wheel 8 is a centrally located one, the outer lower guide wheel 9 is a centrally located one, and the inner lower guide wheel 10 is a centrally located one; thus, a total of six guide wheels (bearings) are arranged, which can ensure good guiding effect while reducing the number of guide wheels and lowering costs. It is conceivable that in other embodiments, the top guide wheel 6, the side upper guide wheel 7, the inner upper guide wheel 8, the outer lower guide wheel 9, and the inner lower guide wheel 10 include one or two or more groups located at the same longitudinal section position.

[0032] Preferably, the edge region on the side of the needle plate 4 away from the guide rail space 11 is the needle distribution region. The needles on the needle plate 4 are distributed in at least two rows along the width of the needle distribution region, and each row of needles is distributed along the length of the needle distribution region to uniformly and stably fix the edge of the film. More preferably, a plurality of needle plate through holes 12 are also distributed on the needle distribution region, which can balance the air pressure, ensure that the film passes through the needle plate smoothly without bending or bulging, and save material costs and reduce the weight of the fixture.

[0033] Preferably, see reference Figure 5 The fixture body is formed by connecting two parts: an upper structural component and a lower structural component. The lower structural component forms the side plate 1 and the bottom plate 3 of the fixture body, and also forms a transverse connecting plate located at the upper end of the side plate 1. The upper structural component connects with the connecting plate to form the top plate 2 of the fixture body. In existing fixture structures, a long bolt or pin is generally used to fix the bottom plate 3 of the top plate 2 through it. This large connecting component increases the weight of the fixture, and its location near the chain link shaft 5 can easily have an adverse effect on the chain drive; or, to ensure that the connecting component is far from the chain link shaft 5, the size of the fixture needs to be increased. In this solution, the lower structural component includes the side plate 1, the bottom plate 3, and a part of the top plate 2 (or the part used to connect to the top plate 2). The plate-like structure of the connecting plate can fit snugly to the top plate 2, ensuring a stable connection. During connection, the top plate 2 and the connecting plate are simply connected by bolts or welding.

[0034] Furthermore, the upper end of the link shaft 5 is connected to the connecting plate, and the lower end of the link shaft 5 is connected to the base plate 3. The lower structural component and the link shaft 5 constitute the outer link of the chain. As a supplementary explanation, the chain consists of an outer link and an inner link, with the outer link located outside the inner link. Existing fixtures are generally manufactured separately from the chain, or the fixture parts are fixed to a regular chain. In this solution, the lower structural component itself constitutes the outer link, which then combines with a regular or specially made inner link to form a complete chain. This eliminates the need for an installation structure and avoids problems such as loosening between the fixture and the chain due to mechanical fit or precision errors.

[0035] Furthermore, two or more (including two) chain link shafts 5 are provided on a lower structural component, with no gaps between adjacent chain link shafts 5 and no other components. In other words, there are no aforementioned long bolts or pins or separate clamps and fasteners between the chain link shafts 5 and the ordinary chain. Therefore, the chain links on the chain link shafts 5 can better mate with the sprockets, and the dimensions of the clamp body (cross-sectional width dimension, for example...) Figure 1 The dimensions in the left and right directions can also be smaller, thereby reducing the material used and weight of the chain clamp.

[0036] In summary, the needle-plate type film stretching fixture of this utility model uses a needle plate method to penetrate and fix the edge of the film, which can play a good role in fixing films of various thicknesses. This solution is particularly suitable for high-end film products with large width and size. At the same time, after the film is stretched by using the needle plate fixing method, the edge portion that needs to be removed is relatively small, which helps to save costs. In addition, this utility model is provided with corresponding guide wheels on both sides of the upper and lower ends of the guide rail and on the top surface of the upper end, which ensures the stability of the fixture along the guide rail and avoids the problem of the film stretching quality being affected by the tilting or shaking of the fixture during movement. Further preferably, the main structure of the fixture of this utility model is simplified, directly forming the outer link of the chain, that is, forming part of the chain. Therefore, there are no additional structural components for connecting and fixing with ordinary chains. Thus, there are no possible obstacles in the link part, which allows the chain to cooperate and transmit more smoothly with the sprocket, further improving the stability of the fixture movement.

Claims

1. A pin plate film stretch fixture, characterized by, It includes a clamp body, one side of which is a vertical side plate (1), and the other side of which is a top plate (2) and a bottom plate (3) extending laterally from the upper and lower ends of the side plate (1). A needle plate (4) is provided on the upper surface of the fixture body near the side plate (1), and needles with their tips pointing upwards or diagonally upwards are provided on the needle plate (4); A chain link shaft (5) is provided between the top plate (2) and the bottom plate (3) on the side of the fixture body near the side plate (1). A top guide wheel (6), an outer upper guide wheel (7), and an inner upper guide wheel (8) are provided on the top plate (2), and an outer lower guide wheel (9) and an inner lower guide wheel (10) are provided on the bottom plate (3). The top guide wheel (6), the outer upper guide wheel (7), the inner upper guide wheel (8), the outer lower guide wheel (9), and the inner lower guide wheel (10) form a guide rail space (11) that matches the cross section of the guide rail. The guide rail space (11) is located on the side of the chain link shaft (5) away from the side plate (1). The top guide wheel (6) is located above the guide rail space (11), the outer upper guide wheel (7) and the inner upper guide wheel (8) are located on the upper sides of the guide rail space (11), and the outer lower guide wheel (9) and the inner lower guide wheel (10) are located on the lower sides of the guide rail space (11).

2. The pin plate film stretching fixture of claim 1, wherein, The rotation axis of the top guide wheel (6) is horizontal, while the rotation axis of the outer upper guide wheel (7), inner upper guide wheel (8), outer lower guide wheel (9), and inner lower guide wheel (10) are all vertical.

3. The pin plate film stretching fixture of claim 2, wherein, A vertical plate is formed above the top plate (2), and the top guide wheel (6) is rotatably connected to one side of the plate. A clearance hole is formed below the top guide wheel (6) on the top plate (2) so that the top guide wheel (6) protrudes below the top plate (2).

4. The needle-plate type film stretching fixture according to claim 1, characterized in that, At least one of the outer upper guide wheel (7) and the outer lower guide wheel (9) is two or more arranged side by side.

5. The needle-plate type film stretching fixture according to claim 1, characterized in that, The top guide wheel (6) is one set in the center, the outer upper guide wheel (7) is two set side by side, the inner upper guide wheel (8) is one set in the center, the outer lower guide wheel (9) is one set in the center, and the inner lower guide wheel (10) is one set in the center.

6. The pin plate film stretching fixture of claim 1, wherein, The edge area on the side of the needle plate (4) away from the guide rail space (11) is the needle distribution area. The needles on the needle plate (4) are distributed in at least two rows in the width direction of the needle distribution area, and each row of needles is distributed in the length direction of the needle distribution area.

7. The needle-plate type film stretching fixture according to claim 6, characterized in that, Multiple needle plate through holes (12) are also distributed in the needle distribution area.

8. The needle-plate type film stretching fixture according to any one of claims 1-7, characterized in that, The fixture body is formed by connecting the upper structural member and the lower structural member; the lower structural member forms the side plate (1) and the bottom plate (3) of the fixture body, and the lower structural member also forms a transverse connecting plate, which is located at the upper end of the side plate (1); the upper structural member is connected to the connecting plate to form the top plate (2) of the fixture body.

9. The needle-plate type film stretching fixture according to claim 8, characterized in that, The upper end of the link shaft (5) is connected to the connecting plate, and the lower end of the link shaft (5) is connected to the base plate (3). The lower structural component and the link shaft (5) constitute the outer link of the chain.

10. The needle-plate type film stretching fixture according to claim 9, characterized in that, Two or more link shafts (5) are provided on a lower structural member, and there is a gap space between adjacent link shafts (5) where no other components exist.

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