High-stability stretching film clamp

Abstract

The utility model discloses a high-stability stretch film clamp which comprises a chain clip assembly, the chain clip assembly comprises a bearing frame, the bearing frame is provided with a plurality of bearings, the bearings are connected with a track plate in a rolling mode, a medium flow channel is arranged in the track plate, the plate wall of the track plate is provided with a release hole communicated with the medium flow channel, and the release hole is communicated with the medium flow channel. An outlet of the release hole is formed in a rolling path of the bearing; chain links are connected to the upper side and / or the lower side of the bearing frame through chain link shafts, and the adjacent chain clip assemblies are connected through the chain links. The film stretching device can improve the running stability of the film stretching device, is suitable for stretching thicker films with various material specifications, reduces the equipment investment, and improves the film quality and the production benefit.

Description

TECHNICAL FIELD

[0001] The utility model relates to thin film stretching production technical field especially relates to a high stability stretching film clamp. BACKGROUND

[0002] Biaxial film stretching technology is a processing technology that began to be industrialized in the 1970s. Biaxially oriented plastics film (BOPF for short) is a general term for plastic films made by biaxial stretching (or biaxial orientation). Biaxial stretching film has developed rapidly in the past decade and has become the main packaging material for various high-performance packaging films. With the increasing demand for the quality of stretched film, one of the requirements is to innovate equipment and provide more extensive manufacturing compatibility.

[0003] The films produced by the double-stretching equipment are mostly used in the fields of packaging, electrical materials, photographic materials, agriculture, building decoration and daily necessities, etc. The plastic films suitable for biaxial stretching production to meet the requirements of these fields mainly include polyester (PET), polypropylene (PP), polyamide (PA), polystyrene (PS) and polyimide (PI) films, polyphenylene sulfide (PPS) and some relatively thick films (more than 100 μm and less than 300 μm), etc. The stretching preparation of these films puts forward higher requirements for the film stretching clamping device.

[0004] The stretching film clamping device is an important component in the horizontal stretching production process. At present, the widely used is a single chain drag stretching clamping device, which is mostly used to produce relatively thin film stretching processing. When stretching relatively thick film, compared with single chain drag, the double chain drag stretching clamping device has the advantages of better force balance and higher running stability. However, since the double chain equipment compared with the single chain equipment, in order to meet the higher load requirements, more moving mechanisms and friction points need to be introduced, so the stable operation of the double chain equipment also needs more attention to the lubrication of the moving mechanism. UTILITY MODEL CONTENTS

[0005] In order to solve one or more technical problems in the prior art, the utility model provides a high stability stretching film clamp.

[0006] A high stability stretching film clamp, comprising a chain tongs assembly, the chain tongs assembly comprises a bearing frame, a plurality of bearings are arranged on the bearing frame, and the bearings are in rolling connection with a track plate:

[0007] The track plate is internally provided with a medium flow channel, the track plate wall is provided with a release hole communicating with the medium flow channel, and the outlet of the release hole is arranged on the rolling path of the bearing;

[0008] The upper side and / or the lower side of the bearing frame are connected with links through link shafts, and the link assemblies adjacent to each other are connected through the links.

[0009] Preferably,

[0010] The bearing frame body is C-shaped, and the bearing frame comprises an upper frame, a vertical frame and a lower frame connected in sequence.

[0011] The upper frame is provided with at least one bearing A in the middle part, the bearing A is in rolling connection with the top of the track plate, and the rolling path of the bearing A is provided with an outlet of release hole A.

[0012] The upper frame is provided with at least two bearings B on the left side of the bottom, the bearings B are in rolling connection with the upper side of the left part of the track plate, and the rolling path of the bearings B is provided with an outlet of release hole B.

[0013] The upper frame is provided with at least two bearings C on the right side of the bottom, the bearings C are in rolling connection with the upper side of the right part of the track plate, and the rolling path of the bearings C is provided with an outlet of release hole C.

[0014] The lower frame is provided with at least two bearings D on the left side of the top, the bearings D are in rolling connection with the lower side of the left part of the track plate, and the rolling path of the bearings D is provided with an outlet of release hole D.

[0015] The lower frame is provided with at least two bearings E on the right side of the top, the bearings E are in rolling connection with the lower side of the right part of the track plate, and the rolling path of the bearings E is provided with an outlet of release hole E.

[0016] Preferably,

[0017] The medium flow channel comprises a vertical medium flow channel provided with a lubricating medium inlet.

[0018] The upper part of the vertical medium flow channel is connected with a horizontal medium flow channel A, and the horizontal medium flow channel A penetrates the release holes A, B and C.

[0019] The lower part of the vertical medium flow channel is connected with a horizontal medium flow channel B, and the horizontal medium flow channel B penetrates the release holes D and E.

[0020] Preferably,

[0021] The link shaft comprises an upper front link shaft and an upper rear link shaft connected with the upper frame, the upper front link shaft is connected with an upper front link, and the upper rear link shaft is connected with an upper rear link.

[0022] Preferably,

[0023] The chain link shaft further comprises a lower front chain link shaft connected with the lower frame and a lower rear chain link shaft connected with the lower rear chain link.

[0024] Preferably,

[0025] The left side of the bearing frame is detachably connected with a clamping seat, the upper portion of the clamping seat is rotatably connected with the inner side of the shaft sleeve of the clamping handle through a clamping handle rotating shaft, the outer side of the shaft sleeve is connected with the vertical wall of the clamping seat through an elastic component, and the elastic component is internally provided with a spring.

[0026] Preferably,

[0027] When the chain tongs assembly is in the closed state, the open state and the conversion process between the closed state and the open state, the spring is in a compressed state, and the maximum compressed deformation state of the spring in the working process is in the conversion process between the closed state and the open state.

[0028] Preferably,

[0029] The elastic component further comprises an outer sleeve and a base;

[0030] The outer sleeve is sleeved outside the spring, the top portion of the spring abuts against the inner side of the top portion of the outer sleeve, and the outer side of the top portion of the outer sleeve is rotatably connected with a notch A arranged on the outer side of the shaft sleeve through a wedge A;

[0031] The bottom portion of the spring is connected with the base, and the outer side of the bottom portion of the base is rotatably connected with a notch B arranged on the vertical wall through a wedge B.

[0032] Preferably,

[0033] The inner side of the top portion of the outer sleeve is connected with an inner sleeve, and the spring is sleeved outside the inner sleeve;

[0034] The top portion of the base is connected with a positioning rod, the inner sleeve is sleeved outside the positioning rod and is in sliding connection with the positioning rod.

[0035] Preferably,

[0036] The clamping seat is detachably connected with a film contact table, and when the chain tongs assembly is in the closed state, the bottom portion of the clamping handle is in clamping fixation with the film contact table on the thin film.

[0037] The utility model discloses the beneficial effects of:

[0038] (1) improve high-speed stretching stability

[0039] The utility model can be applicable to thick film stretching manufacture, in high -speed stretching process, the stability structure of clamping device can effectively disperse stress, ensure that the chain pincers run smoothly, reduce the risk of film stretching unevenly due to shaking, deviation and other factors, make the film thickness of production uniform, physical property stable, improve film quality greatly.

[0040] (2) reduce equipment investment cost

[0041] The utility model is strong in universality, is suitable for most specifications and kinds of film production, need not frequently replace equipment, reduce equipment purchase and maintenance cost, improve equipment utilization, make enterprise more flexible and competitive when facing different order demand. For the user of many specifications and small batch, the utility model can effectively reduce equipment investment cost.

[0042] (3) improve production efficiency

[0043] The stable clamping device of the utility model can guarantee production continuity, reduce downtime time caused by equipment failure and film quality problem. Meanwhile, good film quality can reduce the rejection rate, improve production efficiency, increase economic benefit for enterprise, and make enterprise occupy advantageous position in market competition. BRIEF DESCRIPTION OF DRAWINGS

[0044] The accompanying drawings are included to provide a further understanding of the utility model, and constitute a part of the specification, and are used to explain the utility model together with embodiments of the utility model, and do not constitute the limitation to the utility model.

[0045] Figure 1 It is the schematic view of the stretching film clamp according to the utility model embodiment Figure 1 ;

[0046] Figure 2 It is the sectional view of A-A direction in Figure 1 ;

[0047] Figure 3 It is the enlarged view of B in Figure 1 ;

[0048] Figure 4 It is the schematic view of the stretching film clamp according to the utility model embodiment Figure 2 ;

[0049] Figure 5 It is the schematic view of the stretching film clamp according to the utility model embodiment Figure 3 ;

[0050] Figure 6 It is the schematic view of the transverse pulling device according to the utility model embodiment;

[0051] Figure 7is a schematic diagram of a closed chain tong assembly according to an embodiment of the present application;

[0052] Figure 8 is a schematic diagram of an open chain tong assembly according to an embodiment of the present application;

[0053] in the drawings:

[0054] 1, chain tong assembly; 101, bearing frame; 1011, upper frame; 1012, vertical frame; 1013, lower frame; 102, bearing; 1021, bearing A; 1022, bearing B; 1023, bearing C; 1024, bearing D; 1025, bearing E; 103, chain link shaft; 1031, upper front chain link shaft; 1032, upper rear chain link shaft; 1033, lower front chain link shaft; 1034, lower rear chain link shaft; 104, chain link; 1041, upper front chain link; 1042, upper rear chain link; 1043, lower front chain link; 1044, lower rear chain link; 105, clamping seat; 1051, vertical wall; 10511, notch B; 1052, film contact table; 106, clamping handle pivot shaft; 107, clamping handle; 1071, shaft sleeve; 10711, notch A; 108, elastic assembly; 1081, spring; 1082, outer sleeve; 10821, wedge A; 1083, base; 10831, wedge B; 1084, inner sleeve; 1085, positioning rod; 2, track plate; 201, medium flow channel; 2011, vertical medium flow channel; 2012, lubricating medium inlet; 2013, horizontal medium flow channel A; 2014, horizontal medium flow channel B; 202, release hole; 2021, release hole A; 2022, release hole B; 2023, release hole C; 2024, release hole D; 2025, release hole E; 3, support frame; 4, horizontal pulling device; 401, inlet chain disc; 402, outlet chain disc; 403, horizontal pulling unit inlet; 404, horizontal pulling unit outlet. DETAILED DESCRIPTION

[0055] The present application will be described in detail with reference to the drawings and embodiments. Various examples are provided by way of explanation of the present application and are not intended to limit the present application. In fact, those skilled in the art will appreciate that modifications and variations to the present application can be made without departing from the scope or spirit of the present application. For example, features shown or described as part of one embodiment can be used in another embodiment to yield yet another embodiment. It is, therefore, desired that the present application be deemed as including all such modifications and variations as fall within the scope of the appended claims and their equivalents.

[0056] In the description of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and do not require that this application be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. The terms "connected," "linked," and "set up" used in this application should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0057] like Figures 1-8 As shown, a high-stability stretch film clamp includes a chain clamp assembly 1, which includes a bearing frame 101. The bearing frame 101 has multiple bearings 102 mounted on it, and the bearings 102 are tactilely connected to a track plate 2.

[0058] The track plate 2 is provided with a medium flow channel 201 inside, and the plate wall of the track plate 2 is provided with a release hole 202 that communicates with the medium flow channel 201. The outlet of the release hole 202 is located on the rolling path of the bearing 102.

[0059] The upper and / or lower sides of the bearing bracket 101 are connected to the chain link 104 via the chain link shaft 103, and adjacent chain clip assemblies 1 are connected to each other via the chain link 104.

[0060] An oil passage (medium flow channel 201) is machined into the track plate 2, and the oil passage outlet (release hole 202 outlet) is set on the running trajectory of the bearing 101. The bearing is lubricated by intermittent oil supply. The interval distance, oil supply amount, and supply frequency can be controlled according to the actual operating conditions of the equipment. The lubricating medium flowing in the medium flow channel 201 can be conventional lubricating oil or a cooling lubricant made by mixing lubricating oil and compressed air.

[0061] In one specific embodiment of this utility model:

[0062] The main body of the bearing frame 101 is C-shaped, and the bearing frame 101 includes an upper frame 1011, a vertical frame 1012 and a lower frame 1013 connected in sequence.

[0063] At least one bearing A1021 is provided in the middle of the upper frame 1011. The bearing A1021 is rolledly connected to the top of the track plate 2. The rolling path of the bearing A1021 is provided with the outlet of the release hole A2021.

[0064] The left side of the bottom of the upper frame 1011 is provided with at least two bearings B1022, the bearings B1022 are in rolling connection with the upper side of the left part of the track plate 2, and the rolling path of the bearings B1022 is provided with the outlet of the release hole B2022;

[0065] The right side of the bottom of the upper frame 1011 is provided with at least two bearings C1023, the bearings C1023 are in rolling connection with the upper side of the right part of the track plate 2, and the rolling path of the bearings C1023 is provided with the outlet of the release hole C2023;

[0066] The left side of the top of the lower frame 1013 is provided with at least two bearings D1024, the bearings D1024 are in rolling connection with the lower side of the left part of the track plate 2, and the rolling path of the bearings D1024 is provided with the outlet of the release hole D2024;

[0067] The right side of the top of the lower frame 1013 is provided with at least two bearings E1025, the bearings E1025 are in rolling connection with the lower side of the right part of the track plate 2, and the rolling path of the bearings E1025 is provided with the outlet of the release hole E2025.

[0068] Specifically, the track plate 2 is supported by the support frame 3 and embedded in the inner cavity (C-shaped cavity) of the bearing frame 101. The bearing frame 101 is the support basis of the stretching device, and a plurality of bearings 102 are installed in the inner cavity of the bearing frame 101. The bearings 102 are divided into horizontal installation and vertical installation. The horizontally installed bearings (bearings B1022, bearings C1023, bearings D1024 and bearings E1025) act on the two side surfaces of the guide rail track plate 2, so as to realize the positioning in the horizontal left-right direction. The vertically installed bearings (bearings A1021) act on the upper top surface of the track plate 2, and the track plate 2 supports the vertical direction of the chain tongs assembly through the vertically installed bearings.

[0069] In one specific embodiment of the utility model:

[0070] The medium flow channel 201 comprises a vertical medium flow channel 2011, and the vertical medium flow channel 2011 is provided with a lubricating medium inlet 2012;

[0071] The upper part of the vertical medium flow channel 2011 is connected with a horizontal medium flow channel A 2013, and the horizontal medium flow channel A 2013 is in communication with the release hole A 2021, the release hole B 2022 and the release hole C 2023;

[0072] The lower part of the vertical medium flow channel 2011 is connected with a horizontal medium flow channel B 2014, and the horizontal medium flow channel B 2014 is in communication with the release hole D 2024 and the release hole E 2025.

[0073] The specific processing of the medium flow channel 201 can be processed by a drilling device, and the vertical medium flow channel 2011 can be drilled from top to bottom to be obtained, and the top of the vertical medium flow channel 2011 can be sealed after drilling. In the layered medium flow channel design in the embodiment, the lubricating medium entering from the lubricating medium inlet 2012 can be effectively distributed to the release holes 2023 corresponding to each bearing, so that each bearing can obtain lubricating medium in time, the working efficiency of the lubricating system is improved, and the risk of equipment failure caused by uneven lubrication is reduced. The structure of the vertical medium flow channel 2011 and the horizontal medium flow channel 2013 is relatively simple, and the track plate can be processed and manufactured, thereby reducing the production cost. At the same time, when the equipment is maintained, the structure is also convenient for checking, cleaning and repairing the medium flow channel 201, and is beneficial to maintaining the good performance of the lubricating system.

[0074] In one specific embodiment of the present application:

[0075] The chain link shaft 103 comprises an upper front chain link shaft 1031 connected with the upper frame 1011 and an upper rear chain link shaft 1032, the upper front chain link shaft 1031 is connected with the upper front chain link 1041, and the upper rear chain link shaft 1032 is connected with the upper rear chain link 1042.

[0076] The embodiment is suitable for single-chain dragging equipment, the equipment manufacturing cost is relatively low, and is suitable for thin film stretching with relatively thin thickness.

[0077] In one specific embodiment of the present application:

[0078] The chain link shaft 103 further comprises a lower front chain link shaft 1033 and a lower rear chain link shaft 1034 connected with the lower frame 1013, the lower front chain link shaft 1033 is connected with the lower front chain link 1043, and the lower rear chain link shaft 1034 is connected with the lower rear chain link 1044.

[0079] The embodiment is combined with the previous embodiment, and is suitable for double-chain dragging equipment. Two sets of chain links are adopted, so that the torsional couple formed by external force in the production process can be effectively prevented, local stress concentration of the track plate is reduced, and relatively large transverse stretching force can be provided to cope with thick film stretching production. In the running process, the oil inlet (lubricating medium inlet 2012) on the track plate 2 is connected with an interval oil supply device, so that the bearings and the track plate can be lubricated in a timed and quantitative manner. The combination of the two measures of adopting two sets of chain links and lubricating the bearings by using an oil way can effectively prolong the service life of the connecting assembly and the track plate.

[0080] In one specific embodiment of the present application:

[0081] The left side of the bearing frame 101 is detachably connected with the clamping seat 105, the upper portion of the clamping seat 105 is rotatably connected with the inner side of the shaft sleeve 1071 of the clamping handle 107 through the clamping handle rotating shaft 106, and the outer side of the shaft sleeve 1071 is connected with the vertical wall 1051 of the clamping seat 105 through the elastic assembly 108, and the elastic assembly 108 is internally provided with a spring 1081.

[0082] The detachable connection mode of the bearing frame and the clamping seat facilitates quick disassembly and replacement of the clamping seat or other related parts when the equipment is maintained or the parts are damaged, reduces maintenance time and cost, and improves the maintainability of the equipment.

[0083] In one specific embodiment of the utility model:

[0084] When the chain tongs assembly is in the closed state, the open state and the conversion process between the closed state and the open state, the spring 1081 is in a compressed state, and the maximum compression deformation state of the spring 1081 in the working process is in the conversion process between the closed state and the open state.

[0085] In specific implementation, the opening and closing functions of the clamping device in the utility model are realized by the clamping seat 105, the clamping handle rotating shaft 106, the clamping handle 107 and the spring 1081. In the working state (when clamping the film), the clamping device is in the closed state; and in the return waiting state for clamping and conveying the film, the clamping device is in the open state.

[0086] The maximum compression deformation state of the spring 1081 is the maximum elastic potential point of the spring 1081 in the working state. In the conversion process between the closed state and the open state, the spring 1081 will experience the process that the elastic potential continuously increases (the spring continuously deforms under compression) and reaches the maximum elastic potential point, and then falls from the maximum elastic potential point to a relatively small elastic potential point. Therefore, without the aid of external force, the clamping handle 107 will stably remain in the closed state or the open state.

[0087] As shown in Figures 7-8 , respectively, the closed state and the open state of the clamping device. In the figure, the OF line is the axis of the spring 1081 in the intermediate critical state (the spring 1081 is in the maximum elastic potential point and the maximum compression deformation state), at this time, the spring 1081 is subjected to the maximum pressure. The OA line is the axis of the spring 1081 in the closed state, at this time, the spring 1081 is subjected to a smaller pressure than when the spring axis is in OF. The OB line is the axis of the spring 1081 in the open state, at this time, the spring 1081 is subjected to a smaller pressure than when the spring axis is in OF.

[0088] When the chain is needed to be closed, the closing trigger device (for example, an optional cam mechanism) applies an external force to the upper part of the clamping handle 107 from left to right and makes the axis of the spring 1081 pass from OB to OF. The spring 1081 drives the clamping handle 107 to continue to rotate clockwise around the clamping handle rotating shaft 106 due to the elastic force of the spring 1081, and finally the axis of the spring 1081 is located at the OA line position. The bottom of the clamping handle 107 and the film contact surface of the clamping seat 105 are attached together, and at this time, the chain is in the closed state. In the specific design, the bottom of the clamping handle 107 can be designed with an arc surface, a boss or a texture which can press the film attached to the film contact surface of the clamping seat 105 and prevent the clamping handle 107 from continuing to rotate clockwise and deviating from the clamping seat 105.

[0089] When the chain is needed to be opened, the opening trigger device applies an external force to the upper part of the clamping handle 107 from right to left and makes the axis of the spring 1081 pass from OA to OF. The spring 1081 drives the clamping handle 107 to continue to rotate counterclockwise around the clamping handle rotating shaft 106 due to the elastic force of the spring 1081, and finally the axis of the spring 1081 is located at the OB line position. The clamping handle 107 and the film contact surface of the clamping seat 105 are separated, and the bottom of the clamping handle 107 abuts against the left side of the vertical wall 1051 of the clamping seat 105, and at this time, the chain is in the open state.

[0090] In this way, when the film needs to be stretched, the chain is closed to clamp the film, when the film is stretched, the chain is opened to release the film, and the chain assembly returns.

[0091] In one specific embodiment of the present application:

[0092] The elastic assembly 108 further comprises an outer sleeve 1082 and a base 1083.

[0093] The outer sleeve 1082 is sleeved outside the spring 1081, the top of the spring 1081 abuts against the inside of the top of the outer sleeve 1082, and the outside of the top of the outer sleeve 1082 is rotatably linked with the notch A10711 arranged outside the shaft sleeve 1071 through the wedge A10821.

[0094] The bottom of the spring 1081 is connected with the base 1083, and the outside of the bottom of the base 1083 is rotatably connected with the notch B10511 arranged on the vertical wall 1051 through the wedge B10831.

[0095] The design of the outer sleeve 1082 and the base 1083 plays a good positioning and protection role on the spring 1081, ensures that the spring 1081 always remains in the correct position during the compression and deformation process, prevents the spring 1081 from deviating or twisting, thereby improving the transmission efficiency of the spring elastic force, enabling the clamping handle 107 to more stably obtain the acting force of the spring 1081, and ensuring the clamping performance of the clamping device.

[0096] The outer sleeve 1082 is rotatably connected with the shaft sleeve 1071 through a wedge A 10821, and the base 1083 is rotatably connected with the vertical wall 1051 through a wedge B 10831, so that the elastic component 108 can more flexibly adapt to different motion states when following the movement of the clamping handle 107, reduce the friction resistance and jamming phenomenon in the movement process, improve the smoothness and response speed of the opening and closing action of the clamping device, and help to improve the overall working efficiency of the equipment.

[0097] In one specific embodiment of the present application,

[0098] The outer sleeve 1082 is rotatably connected with the shaft sleeve 1071 through a wedge A 10821, and the base 1083 is rotatably connected with the vertical wall 1051 through a wedge B 10831, so that the elastic component 108 can more flexibly adapt to different motion states when following the movement of the clamping handle 107, reduce the friction resistance and jamming phenomenon in the movement process, improve the smoothness and response speed of the opening and closing action of the clamping device, and help to improve the overall working efficiency of the equipment.

[0099] The base 1083 is connected with a positioning rod 1085 at the top, and the inner sleeve 1084 is sleeved outside the positioning rod 1085 and is in sliding connection with the positioning rod 1085.

[0100] The cooperation structure of the inner sleeve 1084 and the positioning rod 1085 provides a guiding effect for the deformation of the spring 1081, so that the spring 1081 can uniformly deform along the predetermined direction during compression and elongation, avoiding the twisting or instability of the spring 1081, and further improving the stability and reliability of the spring 1081 in operation. At the same time, it is also helpful to prolong the service life of the spring 1081 and reduce the risk of spring force change and failure caused by abnormal deformation of the spring 1081.

[0101] In one specific embodiment of the present application,

[0102] The clamping seat 105 is detachably connected with a film contact table 1052, and when the chain tongs assembly is in the closed state, the bottom of the clamping handle 107 is in clamping and fixing contact with the film contact table 1052.

[0103] The film contact table 1052 is the position of the clamping seat 105 that is pressed the most, in order to enhance the fixation of the film, the film contact table 1052 can be selected from components that can provide large friction, including rubber, silicone or metal provided with anti-skid lines. At the same time, the film contact table 1052 can be detachably connected with the main body of the clamping seat 105, which is convenient for replacement. When the film contact table 1052 is provided, the film contact surface is located on the upper end of the film contact table 1052.

[0104] In specific work, the chain links 104 of the stretching film clamp in several embodiments of the utility model are connected to each other to form a ring chain, the chain is installed on the inlet chain disc 401 and the outlet chain disc 402 of the horizontal pulling device 4, the chain is in a tension state, the clamping device installed on the chain moves along with the chain ring, once triggered by the combined trigger device at the inlet 403 of the horizontal pulling unit, the film contact table 1052 of the clamp handle 107 and the clamping seat 105 will be attached together, and the chain clamp is in a closed state; the chain clamp clamps the film to forwardly convey, when passing through the stretching area, the distance between the tracks of the horizontal pulling device 4 is increased, the clamping device stretches the film to complete the horizontal stretching operation of the film; when the film runs to the outlet 404 of the horizontal pulling unit, the opening trigger device is arranged here, the film contact table 1052 of the clamp handle 107 and the clamping seat 105 will be separated, the chain clamp is in an open state, and the film is released; the chain clamp circulates along the chain to return to the inlet 403 of the horizontal pulling unit to wait for clamping the next section of film, and the conveying and stretching action of the previous cycle is repeated; and the continuous horizontal stretching production of the film is completed.

[0105] In conclusion, the utility model can improve the running stability of the film stretching device, is suitable for stretching of various material specifications and relatively thick films, reduces equipment investment, and improves film quality and production efficiency.

[0106] The above is only the preferred embodiment of the application and is not used to limit the application, and the application can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the application should be included in the protection scope of the application.

Claims

1. A high-stability stretch film clamp, comprising a chain tongs assembly (1), the chain tongs assembly (1) comprising a bearing frame (101) provided with a plurality of bearings (102), the bearings (102) being in rolling connection with a track plate (2), characterized in that: the track plate (2) is internally provided with a medium flow channel (201), the plate wall of the track plate (2) is provided with a release hole (202) penetrating through the medium flow channel (201), and the outlet of the release hole (202) is arranged on the rolling path of the bearing (102); and the upper side and / or the lower side of the bearing frame (101) is connected with a chain link (104) through a chain link shaft (103), and the chain links (104) are connected between chain tongs assemblies (1) adjacent to each other.

2. The high-stability stretch film clamp according to claim 1, characterized in that: the main body of the bearing frame (101) is in a C shape, and the bearing frame (101) comprises an upper frame (1011), a vertical frame (1012) and a lower frame (1013) connected in sequence; at least one bearing A (1021) is arranged in the middle of the upper frame (1011), the bearing A (1021) is in rolling connection with the top of the track plate (2), and the outlet of the release hole A (2021) is arranged on the rolling path of the bearing A (1021); at least two bearings B (1022) are arranged on the left bottom of the upper frame (1011), the bearings B (1022) are in rolling connection with the upper left side of the track plate (2), and the outlets of the release holes B (2022) are arranged on the rolling paths of the bearings B (1022); at least two bearings C (1023) are arranged on the right bottom of the upper frame (1011), the bearings C (1023) are in rolling connection with the upper right side of the track plate (2), and the outlets of the release holes C (2023) are arranged on the rolling paths of the bearings C (1023); at least two bearings D (1024) are arranged on the left top of the lower frame (1013), the bearings D (1024) are in rolling connection with the lower left side of the track plate (2), and the outlets of the release holes D (2024) are arranged on the rolling paths of the bearings D (1024); and at least two bearings E (1025) are arranged on the right top of the lower frame (1013), the bearings E (1025) are in rolling connection with the lower right side of the track plate (2), and the outlets of the release holes E (2025) are arranged on the rolling paths of the bearings E (1025).

3. The high-stability stretch film clamp according to claim 2, characterized in that: the medium flow channel (201) comprises a vertical medium flow channel (2011) provided with a lubricating medium inlet (2012); and the upper part of the vertical medium flow channel (2011) is connected with a horizontal medium flow channel A (2013), the horizontal medium flow channel A (2013) penetrates through the release hole A (2021), the release hole B (2022) and the release hole C (2023). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The lower part of the vertical medium flow channel (2011) is connected with a horizontal medium flow channel B (2014), the horizontal medium flow channel B (2014) penetrates a release hole D (2024) and a release hole E (2025).

4. The high-stability stretch film clamp of claim 2, wherein: The link shaft (103) comprises an upper front link shaft (1031) and an upper rear link shaft (1032) connected with the upper frame (1011), the upper front link shaft (1031) is connected with an upper front link (1041), and the upper rear link shaft (1032) is connected with an upper rear link (1042).

5. The high-stability stretch film clamp of claim 4, wherein: The link shaft (103) further comprises a lower front link shaft (1033) and a lower rear link shaft (1034) connected with the lower frame (1013), the lower front link shaft (1033) is connected with a lower front link (1043), and the lower rear link shaft (1034) is connected with a lower rear link (1044).

6. The high-stability stretch film clamp of claim 1, wherein: The left side of the bearing frame (101) is detachably connected with a clamping seat (105), the upper part of the clamping seat (105) is rotatably connected with the inner side of a shaft sleeve (1071) of a clamping handle (107) through a clamping handle rotating shaft (106), the outer side of the shaft sleeve (1071) is connected with a vertical wall (1051) of the clamping seat (105) through a spring assembly (108), and the inside of the spring assembly (108) is provided with a spring (1081).

7. The high-stability stretch film clamp of claim 6, wherein: When the chain tongs assembly is in the closed state, the open state, and the conversion process between the closed state and the open state, the spring (1081) is in a compressed state, and the maximum compressed deformation state of the spring (1081) in the working process is in the conversion process between the closed state and the open state.

8. The high-stability stretch film clamp of claim 7, wherein: The spring assembly (108) further comprises an outer sleeve (1082) and a base (1083). The outer sleeve (1082) is sleeved on the outside of the spring (1081), the top of the spring (1081) abuts against the inside of the top of the outer sleeve (1082), the outside of the top of the outer sleeve (1082) is rotatably connected with a slot A (10711) arranged on the outside of the shaft sleeve (1071) through a wedge A (10821); The bottom of the spring (1081) is connected with the base (1083), and the outside of the bottom of the base (1083) is rotatably connected with a slot B (10511) arranged on the vertical wall (1051) through a wedge B (10831).

9. The high-stability stretch film clamp of claim 8, wherein: The inside of the top of the outer sleeve (1082) is connected with an inner sleeve (1084), and the spring (1081) is sleeved on the outside of the inner sleeve (1084). The bottom of the base (1083) is connected with a positioning rod (1085), the inner sleeve (1084) is sleeved outside the positioning rod (1085) and is in sliding connection with the positioning rod (1085).

10. The high-stability tensile film clamp according to any one of claims 6-9, characterized in that: The clamping seat (105) is detachably connected with a film contact table (1052), when the chain tongs assembly is in the closed state, the bottom of the clamping handle (107) and the film contact table (1052) clamp and fix the film.

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