Longitudinally-stretched and transversely-contracted chain clamp

Abstract

The utility model is applicable to the technical field of film production, and provides a longitudinally-stretched and transversely-contracted chain clamp, the chain clamp is detachably connected to a chain link of a chain, the chain clamp comprises an upper clamp body and a lower clamp body which are distributed on the two sides of a chain pin shaft, a sliding cavity for the chain and a track to penetrate through is formed between the upper clamp body and the lower clamp body, and the sliding cavity is communicated with the chain pin shaft. According to the chain clip, the upper clip body and the lower clip body are installed on the two sides of the chain link through the connecting rod, in the running process of the chain, the chain clip moves along the track along with the chain, the clip head is hinged into the hinge groove through the hinge shaft, the chain clip can move along the track along with the chain, and therefore the chain clip can move along the track along with the chain. The clamping head is elastically tensioned through the compression spring, then the bottom end of the clamping head is rotated into the hinge groove by pressing the top end of the clamping head and compressing the compression spring, after the edge of the film penetrates through the hinge groove, under the return action of the compression spring, the bottom end of the clamping head rotates and presses the film downwards, the film is clamped, and operation is more convenient and faster.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of film production technology, especially relates to a longitudinal stretching transverse shrinkage chain clamp. BACKGROUND

[0002] Film is widely used in many fields, after extruding machine extrusion, the film is thick, can not satisfy the use requirement, must carry out longitudinal and transverse stretch, the purpose is to reduce the film thickness, guarantee its lightness, must clamp the film during the stretching process, so the pincers are the key components of the film transverse stretching machine.

[0003] At present, the pincers used in the film transverse longitudinal stretch, and adopt double track chain clamp, are inconvenient to disassemble, inconvenient to operate, the clamping stability of the film is poor, and the structure of the double track chain clamp leads to the track structure is complicated, the control of the chain clamp is more complex, when changing the stretching or shrinkage amount, the chain clamp is guided through the second track, and in most cases, the second track does not participate in the important work after changing the spacing. Therefore, in order to solve the above problems, a longitudinal stretching transverse shrinkage chain clamp is provided. SUMMARY

[0004] The utility model provides a kind of longitudinal stretching transverse shrinkage chain clamp, to solve the pincers used in the film transverse longitudinal stretch at present, it is inconvenient to disassemble, inconvenient to operate, and the structure of the double track chain clamp leads to the track structure is complicated.

[0005] The utility model is realized as follows: a kind of longitudinal stretching transverse shrinkage chain clamp, the chain clamp is detachably connected on the link of chain, the chain clamp includes the upper pincers and lower pincers distributed in the both sides of chain pin shaft, the upper pincers and lower pincers are formed with the sliding cavity that chain and track pass between, the both ends of the pin shaft of the both sides of the link are detachably connected with the upper pincers and lower pincers respectively, the sliding cavity is slidably matched with track, the top surface of the upper pincers is provided with hinged groove on the side away from track, the hinged groove is provided with hinged shaft detachably connected with the upper pincers, the hinged shaft is hinged with the chuck contained in hinged groove, the end face of the bottom end of the chuck is matched with the bottom surface of hinged groove, and the bottom of the chuck and the inner wall of hinged groove are connected with compression spring.

[0006] Preferably, spring sleeve is provided between the chuck and the inner wall of the hinged groove, the compression spring is contained in the spring sleeve, and the both ends of the compression spring are abutted with pin column penetrating the spring sleeve, one of the pin columns is slidably matched with the spring sleeve, and the outer end of the two pin columns is respectively hinged with the upper pincers and the chuck.

[0007] Preferably, the bottom surface of the hinged groove is sunkly provided with connecting rod, the connecting rod penetrates the sliding cavity and the link, and the bottom end of the connecting rod is detachably connected with the lower pincers.

[0008] Preferably, the middle part of the hinged groove is provided with a positioning table detachably connected with the hinge shaft, and the chuck is provided with two chucks distributed on the two sides of the positioning table.

[0009] Preferably, the pin shaft of the chain link is provided with a first rolling element at both ends, the sliding cavity is provided with a limiting groove sunk in the upper pincer body on the side away from the lower pincer body, the top surface of the upper pincer body is provided with a mounting groove corresponding to the limiting groove on the side away from the hinged groove, the limiting groove is provided with a second rolling element, and both ends of the upper pincer body and the lower pincer body are detachably connected with a fixing shaft accommodated in the sliding cavity.

[0010] Preferably, the inner wall of the mounting groove is sunk and mounted with a threaded shaft detachably connected with the upper pincer body, and the second rolling element is detachably connected in the limiting groove through the threaded shaft.

[0011] Preferably, the inner bottom surface of the mounting groove and the bottom surface of the lower pincer body are both provided with a baffle, and the end of the fixing shaft away from the sliding cavity penetrates through the baffle and is detachably connected with a second locking element.

[0012] Preferably, the inner bottom surface of the sliding cavity is sunk and mounted with a round pad corresponding to the second rolling element, and the round pad cooperates with the track.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] The upper pincer body and the lower pincer body are installed on the two sides of the chain link through the connecting rod, the chain clamp moves along the track with the chain in the operation process, the chuck is hinged in the hinged groove through the hinge shaft, the chuck is elastically tensioned by the compression spring, the top end of the chuck is pressed, the compression spring is compressed, the bottom end of the chuck is turned into the hinged groove, and the bottom end of the chuck is separated from the bottom surface of the hinged groove, the film edge passes through the hinged groove, the chuck is loosened, the bottom end of the chuck is turned and pressed down under the action of the compression spring, the film is clamped through the cooperation of the end surface of the bottom end of the chuck and the bottom surface of the hinged groove, the film is stretched longitudinally or transversely in the movement process of the chain clamp, and the operation is more convenient.

[0015] The compression spring is accommodated by the spring sleeve, the compression spring elastically abuts against the pin column, the pin column is hinged with the upper pincer body and the chuck, the chuck is elastically tensioned, the structure is more stable, and the stability of the chuck in clamping the film is effectively improved.

[0016] The utility model discloses a first rolling piece is installed and is positioned to the pin shaft of chain link, and the second rolling piece is installed and is positioned by the cooperation of screw shaft and limit groove, and the third rolling piece is positioned and is installed by fixed shaft simultaneously, and then through four two pairs of first rolling pieces and four two pairs of third rolling pieces rolling contact track, chain clamp is rolled and is clamped on the track, and through the second rolling piece and track upper edge rolling contact, chain clamp is limited downward, and by round pad and track lower edge cooperation, chain clamp is limited upward, and chain clamp operating resistance is little, and operating is more stable, and track is more simple, has reduced the tediousness of track greatly, and also is convenient for control and adjustment longitudinal transverse width. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the three-dimensional structure schematic diagram of the utility model and chain link cooperation;

[0018] Figure 2 It is the main view structure schematic diagram of the utility model and chain link cooperation;

[0019] Figure 3 It is Figure 2 The A-A section structure in the middle is the schematic diagram of cooperation with monorail track;

[0020] Figure 4 It is Figure 2 The B-B section structure schematic diagram in the middle;

[0021] Figure 5 It is Figure 4 The A place local amplification structure schematic diagram in the middle.

[0022] In the drawing: 1, upper pincers body;2, lower pincers body;3, sliding cavity;4, connecting rod;5, first locking piece;6, chain link;7, positioning hole;8, first rolling piece;9, installation slot;10, limit groove;11, screw shaft;12, second rolling piece;13, round pad;14, fixed shaft;15, third rolling piece;16, second locking piece;17, hinged groove;18, positioning table;19, chuck;20, hinged shaft;21, positioning pin;22, spring cover;23, pin column;24, compression spring;25, limit hole. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following is combined with the drawing and example, and the utility model is further detailedly explained.It should be understood that the specific example described here is only used to explain the utility model, and is not used to limit the utility model.

[0024] Example 1

[0025] Please refer to Figures 1-5The utility model provides a technical scheme: a kind of longitudinal stretch transverse shrink chain clamp, the chain clamp is detachably connected on the chain link 6 of chain, specifically, multiple parallel chain clamps are arranged on the whole chain of chain, and each chain clamp corresponds with single outer chain link in chain, the chain clamp includes the upper pincers 1 and lower pincers 2 distributed in the both sides of chain pin shaft, specifically, the upper pincers 1 and lower pincers 2 are located above and below chain link 6 respectively, the side of the upper pincers 1 away from track extends to lower pincers 2 downward, the upper pincers 1 and lower pincers 2 are U-shaped half-enclosed in the outside of single chain link of chain, sliding cavity 3 that chain and track pass through is formed between the upper pincers 1 and lower pincers 2, specifically, the chain is located in the side of sliding cavity 3 away from opening, the track is located in the side of sliding cavity 3 close to opening, the cross section of track is T-shaped, the top end of T-shaped stretches into sliding cavity 3, the part perpendicular to top end is used to connect the load bearing surface of track, the both ends of the pin shaft of the both sides of chain link 6 are detachably connected with the upper pincers 1 and lower pincers 2 respectively, specifically, the side end face of the upper pincers 1 and lower pincers 2 adjacent is all provided with positioning hole 7, i.e. the positioning hole 7 is located in the inner top surface and inner bottom surface of sliding cavity 3, and the positioning hole 7 is counterbore, the pin shaft end of chain link 6 stretches into positioning hole 7, sliding cavity 3 and track are slidingly fitted, the side of the top surface of the upper pincers 1 away from track is equipped with hinged groove 17, specifically, the angle of hinged groove 17 is greater than 90 degrees, hinged groove 17 is provided with hinged shaft 20 detachably connected with the upper pincers 1, hinged shaft 20 is hinged with chuck 19 accommodated in hinged groove 17, the end face of the bottom end of chuck 19 cooperates with the bottom surface of hinged groove 17, specifically, the both sides of the top of the upper pincers 1 are equipped with the notch of intercommunication hinged groove 17, convenient for film to pass through hinged groove 17, and to be pasted with the bottom surface of hinged groove 17, the bottom surface of chuck 19 is equipped with anti-skid tooth, chuck 19 is clamped film by the cooperation of anti-skid tooth and the bottom surface of hinged groove 17, the bottom of chuck 19 and the inner wall of hinged groove 17 are connected with compression spring 24, i.e. chain clamp can be installed in the both sides of chain link 6 by the upper pincers 1 and lower pincers 2, chain clamp is connected with chain, chain clamp moves along track with chain during chain running, and chuck 19 is hinged in hinged groove 17 by hinged shaft 20, chuck 19 is elastically tensioned by compression spring 24, then the top end of chuck 19 is pressed, and compression spring 24 is compressed, then the bottom end of chuck 19 is turned into hinged groove 17, and is separated from the bottom surface of hinged groove 17, after film edge passes through hinged groove 17, chuck 19 is loosened, under the action of compression spring 24, the bottom end of chuck 19 is rotated and presses down film, then film is clamped by the cooperation of the end face of the bottom end of chuck 19 and the bottom surface of hinged groove 17, chain clamp is stretched longitudinally or transversely to film during moving with chain, operation is more convenient.

[0026] Further, the bottom surface of the hinged groove 17 is sunk to be provided with a connecting rod 4 penetrating through the sliding cavity 3 and the chain link 6, specifically, the connecting rod 4 is in the shape of a stepped shaft, the shaft segment of the connecting rod 4 penetrating into the sliding cavity 3 is matched with the shaft hole of the chain plate of the chain link 6, the bottom end of the shaft is processed with external threads, and the top end of the external threads is matched with the boss end face of the top surface of the lower clam body 2, the bottom end of the connecting rod 4 is detachably connected with the lower clam body 2, specifically, one end of the connecting rod 4 extending out of the lower clam body 2 is threadedly connected with a first locking piece 5, the first locking piece 5 is an outer hexagonal nut, and a double-ear stop washer matched with the connecting rod 4 is arranged between the first locking piece 5 and the bottom surface of the lower clam body 2, that is, the upper clam body 1, the lower clam body 2 and the chain link 6 can be detachably connected through the connecting rod 4 and the first locking piece 5, which is more convenient for disassembly and maintenance.

[0027] Further, the middle part of the hinged groove 17 is provided with a positioning table 18 detachably connected with a hinged shaft 20, specifically, the positioning table 18 is connected with the side wall of the hinged groove 17 through bolts or is integrally formed, the hinged shaft 20 is matched with the shaft hole of the positioning table 18 and is fixed through a positioning pin 21, two clamping heads 19 are arranged, and the two clamping heads 19 are distributed on the two sides of the positioning table 18, specifically, the positioning table 18 is provided with a through hole corresponding to the connecting rod 4, the connecting rod 4 enters through the through hole in the positioning table 18 and is finally matched with the counterbore of the bottom surface of the hinged groove 17, that is, the hinged shaft 20 can be fixed through the positioning table 18 and the positioning pin 21, which is more convenient for disassembly and assembly of the hinged shaft 20, and the clamping of the film is more stable through the cooperation of the two clamping heads 19 and the bottom surface of the hinged groove 17.

[0028] Further, a spring sleeve 22 is arranged between the clamping head 19 and the inner wall of the hinged groove 17, a compression spring 24 is contained in the spring sleeve 22, and the two ends of the compression spring 24 are abutted with pins 23 penetrating through the spring sleeve 22, specifically, the two ends of the compression spring 24 are abutted with the pins 23, one of the pins 23 is slidingly matched with the spring sleeve 22, specifically, the end of the spring sleeve 22 close to the clamping head 19 is provided with a rectangular round corner-shaped limiting hole 25, the pin 23 is matched with the limiting hole 25 and is eccentrically arranged on one side of the hinge center of the clamping head 19, the other pin 23 is matched with the shaft hole of the end of the spring sleeve 22 away from the clamping head 19, and the outer end of the two pins 23 is respectively hinged with the upper clam body 1 and the clamping head 19, specifically, the inner wall of the hinged groove 17 and the side end face adjacent to the clamping head 19 are both provided with a groove, the two side end faces of the groove are provided with U-shaped counterbores, and the outer end of the pin 23 is clamped into the counterbores, that is, the compression spring 24 can be contained through the spring sleeve 22, and then the compression spring 24 elastically abuts against the pin 23, the pin 23 is hinged with the upper clam body 1 and the clamping head 19 respectively, and then the clamping head 19 is elastically tensioned, the structure is more stable, and the stability of the clamping of the film by the clamping head 19 is effectively improved.

[0029] In the embodiment, the upper and lower clamps 1 and 2 are installed on both sides of the chain link 6 through the connecting rod 4, and are stably connected with the chain link 6 by the cooperation of the positioning holes 7 of the upper and lower clamps 1 and 2 with the pin shafts at both ends of the chain link 6. During the operation of the chain, the chain clamp moves along the track with the chain, and the clamping head 19 is hinged in the hinge groove 17 through the hinge shaft 20, and is elastically tensioned by the compression spring 24;

[0030] During the longitudinal and transverse stretching of the film, the top end of the clamping head 19 is pressed, and the compression spring 24 is compressed, so that the bottom end of the clamping head 19 is turned into the hinge groove 17 and separated from the bottom surface of the hinge groove 17. After the film edge passes through the hinge groove 17, the clamping head 19 is released, and under the normal action of the compression spring 24, the bottom end of the clamping head 19 is rotated and presses the film, and then the film is clamped through the cooperation of the end surface of the bottom end of the clamping head 19 and the bottom surface of the hinge groove 17;

[0031] During the movement of the chain clamp with the chain, the film is stretched longitudinally and transversely, that is, it can be transversely contracted while being longitudinally stretched. When the film is longitudinally stretched, the longitudinal linear distance of the chain clamp is shortened, realizing the transverse longitudinal stretching and transverse contraction, the film clamping is more stable, and the operation is more convenient.

[0032] Example 2

[0033] Please refer to Figures 1-4 On the basis of example 1, the difference is that:

[0034] Further, the pin shaft of the chain link 6 is provided with a first rolling element 8 at both ends, specifically, the first rolling element 8 is a bearing, and is a deep groove ball bearing, the outer diameter of the first rolling element 8 is greater than the width of the chain link 6, the side of the sliding cavity 3 away from the lower pincer body 2 is provided with a limiting groove 10 sunk into the upper pincer body 1, specifically, the limiting groove 10 is communicated with the sliding cavity 3, the side of the top surface of the upper pincer body 1 away from the hinged groove 17 is provided with a mounting groove 9 corresponding to the limiting groove 10, specifically, the mounting groove 9 is a right angle-shaped groove, the limiting groove 10 is provided with a second rolling element 12, specifically, the second rolling element 12 is a bearing, and is a deep groove ball bearing, both ends of the upper pincer body 1 and the lower pincer body 2 are detachably connected with a fixing shaft 14 accommodated in the sliding cavity 3, one end of the fixing shaft 14 extending into the sliding cavity 3 is provided with a third rolling element 15 corresponding to the first rolling element 8, specifically, the third rolling element 15 is a bearing, and is a deep groove ball bearing, one end of the fixing shaft 14 located in the sliding cavity 3 is formed with a skirt ring limiting the third rolling element 15, the side end surface of the upper pincer body 1 and the lower pincer body 2 adjacent to each other is formed with a boss abutting against the inner ring of the third rolling element 15, the first rolling element 8, the second rolling element 12 and the third rolling element 15 rollingly clamp the track, specifically, the first rolling element 8 rollingly contacts the side end surface of the T-shaped track away from the bearing structure thereof, the second rolling element 12 rollingly contacts the upper end surface of the track, and the third rolling element 15 rollingly contacts the side end surface of the track bottom edge and the top edge away from the first rolling element 8, referring to Figure 2 That is, the first rolling element 8, the second rolling element 12 and the third rolling element 15 and other 9 bearings distributed in the sliding cavity 3 are matched to rollingly clamp the track, and then the sliding cavity 3 is slidably matched with the track, so that the chain clamp is installed on the track, the chain clamp is guided by the track, the chain clamp runs more stably, and the chain clamp is convenient to disassemble, maintain and assemble.

[0035] Wherein, the inner wall of the mounting groove 9 is sunk to be provided with a threaded shaft 11 detachably connected with the upper pincer body 1, specifically, the threaded shaft 11 is threadedly connected with the upper pincer body 1, and the second rolling element 12 is detachably connected in the limiting groove 10 through the threaded shaft 11, specifically, the threaded shaft 11 is matched with the shaft hole of the second rolling element 12, that is, the second rolling element 12 is installed in the limiting groove 10 through the threaded shaft 11 threadedly connected with the upper pincer body 1, and then the second rolling element 12 rollingly contacts the upper edge of the track to stably hang the chain clamp on the track.

[0036] Wherein, the inner bottom surface of the mounting groove 9 and the bottom surface of the lower pincer body 2 are provided with baffles, one end of the fixing shaft 14 away from the sliding cavity 3 penetrates through the baffles and is detachably connected with a second locking element 16, specifically, the second locking element 16 is an outer hexagonal nut, that is, the fixing shaft 14 is connected through the second locking element 16, and then the third rolling element 15 is installed in the sliding cavity 3.

[0037] Further, the bottom surface of the sliding cavity 3 is sunk to install a round pad 13, specifically, the middle part of the top surface of the lower clip body 2 is clamped with a counterbore matched with the round pad 13, the round pad 13 corresponds to the second rolling part 12, the round pad 13 is matched with the track, specifically, the top surface of the round pad 13 is matched with the bottom end surface of the track with a reserved gap, that is, the chain clip can be limited upward by the round pad 13, and the stability of the chain clip is improved.

[0038] In the embodiment, by cooperation of the nine bearings including the first rolling part 8, the second rolling part 12 and the third rolling part 15 distributed in the sliding cavity 3, the four pairs of first rolling parts 8 and the four pairs of third rolling parts 15 respectively roll the two side end surfaces of the track, and then the horizontal position of the chain clip is limited by the track, the chain clip is limited downward by the second rolling part 12, and the chain clip is limited upward by the round pad 13, so that the stability of the chain clip is improved.

[0039] In order to reduce the processing difficulty of the track, the straight T-shaped track needs to be changed in direction at the end, the horizontal distance is changed, and when the transverse shrinkage of the film is controlled, the two track plates changed in direction by bending are used to transition between the two adjacent straight T-shaped tracks, the track is gradually changed from single track to double track and then to single track, the track structure is simpler, the transverse shrinkage of the film is easier to control, the chain clip has the characteristics of bidirectional stretching, and the track is avoided to be complicated and redundant.

[0040] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A longitudinally stretchable and transversely contractible chain clip, which is detachably attached to a link (6) of a chain, characterized in that: The chain clamp comprises upper pincers (1) and lower pincers (2) distributed on both sides of the chain pin shaft, a sliding cavity (3) through which the chain and the track pass is formed between the upper pincers (1) and the lower pincers (2), both ends of the pin shaft on both sides of the chain link (6) are detachably connected with the upper pincers (1) and the lower pincers (2) respectively, the sliding cavity (3) is in sliding fit with the track, the top surface of the upper pincers (1) away from the track is provided with a hinged groove (17), the hinged groove (17) is provided with a hinge shaft (20) detachably connected with the upper pincers (1), the hinge shaft (20) is hinged with a chuck (19) accommodated in the hinged groove (17), the end surface of the bottom end of the chuck (19) is in fit with the bottom surface of the hinged groove (17), and a compression spring (24) is connected between the bottom of the chuck (19) and the inner wall of the hinged groove (17).

2. The longitudinal stretching and transverse shrinking chain clamp as described in claim 1, characterized in that: A spring sleeve (22) is arranged between the chuck (19) and the inner wall of the hinged groove (17), the compression spring (24) is accommodated in the spring sleeve (22), and both ends of the compression spring (24) abut against pin columns (23) penetrating through the spring sleeve (22), one of the pin columns (23) is in sliding fit with the spring sleeve (22), and the outer end of the two pin columns (23) is hinged with the upper pincers (1) and the chuck (19) respectively.

3. The longitudinal stretching and transverse shrinking chain clamp as described in claim 1, characterized in that: The bottom surface of the hinged groove (17) is sunkly provided with a connecting rod (4) penetrating through the sliding cavity (3) and the chain link (6), and the bottom end of the connecting rod (4) is detachably connected with the lower pincers (2).

4. A machine as claimed in claim 3, wherein: the chain is a longitudinally-stretching, transversely- contracting chain. The middle part of the hinged groove (17) is provided with a positioning table (18) detachably connected with the hinge shaft (20), and the chuck (19) is provided with two chucks distributed on both sides of the positioning table (18).

5. A longitudinal stretching and transverse shrinking chain clamp as described in claim 1, characterized in that: Both ends of the pin shaft of the chain link (6) are provided with first rolling members (8), the side of the sliding cavity (3) away from the lower pincers (2) is provided with a limiting groove (10) sunkly arranged in the upper pincers (1), the side of the top surface of the upper pincers (1) away from the hinged groove (17) is provided with a mounting groove (9) corresponding to the limiting groove (10), the limiting groove (10) is provided with a second rolling member (12), and both ends of the upper pincers (1) and the lower pincers (2) are detachably connected with a fixing shaft (14) accommodated in the sliding cavity (3), one end of the fixing shaft (14) extending into the sliding cavity (3) is provided with a third rolling member (15) corresponding to the first rolling member (8), and the first rolling member (8), the second rolling member (12) and the third rolling member (15) rollingly clamp the track.

6. A machine as claimed in claim 5, wherein: the chain is a longitudinally-stretching, transversely- contracting chain. A round pad (13) is sunkly arranged and mounted on the inner bottom surface of the sliding cavity (3), the round pad (13) corresponds to the second rolling member (12), and the round pad (13) is in fit with the track.

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