Tentering setting machine based on chain suitable for three-dimensional path

Abstract

Cloth conveying equipment comprises a chain conveying mechanism and a power device, the motion path of the cloth conveying equipment comprises a gradually-widened section and a parallel section, the front end of the chain conveying mechanism is horizontally arranged in a swinging mode, the chain conveying mechanism comprises the chain, a chain wheel and a track, the chain is meshed with the chain wheel, and the track is meshed with the chain wheel. The chain slides on the track, the inner side of the chain is in contact with the inner side wall of the track, a needle plate is arranged on the inner side of the chain, the chain unit comprises at least two chain links, the chain links in the chain unit are rotationally connected end to end, and the rotating connection in the chain unit at least comprises a horizontal rotating connection. According to the stentering setting machine, abnormal abrasion of the chain is avoided, the service life is prolonged, the longitudinal length of the stentering setting machine is reduced through the horizontal rotating connecting structures between the chain units, the chain is prevented from turning on one side through the bearings and the pressing strips, the working stability of the stentering setting machine is ensured, and the chain is prevented from being disengaged from the chain wheels through the limiting baffles.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of tentering setting machine, especially points to the tentering setting machine based on the chain suitable for three -dimensional path. BACKGROUND

[0002] The tentering setting machine is used for widening cloth and heating and setting the cloth, and the basic working principle is that the cloth is clamped on the chain conveying mechanism, is conveyed into the oven (heat setting room) by the chain conveying mechanism, the heating system for heating the cloth is arranged in the oven, and the cloth is heated and set in the oven and is conveyed out of the oven by the chain conveying mechanism.

[0003] Since the cloth heating and setting needs a certain time, under the premise that the residence time of the cloth in the oven is long enough, the working efficiency of the setting machine needs to be improved (the chain conveying speed is ensured), the oven needs to have a longer length (the common single-layer tentering setting length is generally about 30m), which inevitably needs a larger floor area.

[0004] In order to reduce the floor area of the tentering setting machine, the tentering setting machine disclosed in Chinese utility model patents CN219908143U and CN218203486U is arranged in a vertical plane, a multi-layer drying structure is formed, the equipment length of the tentering setting machine is effectively reduced, but in this application scenario, the cloth feeding section of the chain needs to be bent at an angle relative to the setting section based on the need of gradually widening the cloth width, and when the traditional chain is used, the bending of the cloth feeding section relative to the setting section can only be realized through a long path based on the cooperation gap between the sleeve and the pin shaft. This not only passively lengthens the equipment, but also has the serious problem of abnormal wear of the chain. SUMMARY

[0005] The utility model makes a directional description on the chain structure based on the state that a section of chain is placed horizontally in a straight line.

[0006] In the utility model, the inner side of the chain conveying mechanism refers to the side close to the cloth, and the outer side refers to the opposite side.

[0007] The utility model aims at reducing the volume of the tentering machine and avoiding abnormal wear of the chain based on the existing tentering setting machine, and constructs the tentering setting machine based on the chain suitable for three-dimensional path by arranging the chain conveying mechanism that can move in the vertical direction and the horizontal direction.

[0008] The invention discloses a tentering machine based on a chain suitable for three-dimensional path, comprising an inlet area device, a heat setting area device, an outlet area device and a cloth conveying device for conveying cloth from the inlet area to the heat setting area and then from the heat setting area to the outlet area, characterized in that the cloth conveying device comprises two sets of chain conveying mechanisms arranged side by side and moving synchronously, and a power device for driving the movement of the chain conveying mechanisms,

[0009] The movement path of the cloth conveying device comprises a gradually widening section from the inlet point to the heat setting area and a parallel section from entering the heat setting area to the outlet point, the inlet point being the initial point of the cloth entering the cloth conveying device, and the outlet point being the terminal point of the cloth leaving the cloth conveying device,

[0010] The distance between the two sets of chain conveying mechanisms arranged side by side gradually widens along the movement direction of the cloth on the gradually widening section, and the distance between the two sets of chain conveying mechanisms arranged side by side remains unchanged along the movement direction of the cloth on the parallel section,

[0011] The front end of the chain conveying mechanism is horizontally oscillated, and the oscillation amplitude is the width variation of the cloth,

[0012] The chain conveying mechanism comprises a chain, a sprocket and a track, the chain is provided with a first matching structure, the sprocket is provided with a second matching structure, and the chain is engaged with the sprocket through the cooperation of the first matching structure and the second matching structure;

[0013] The chain is provided with sliding parts on both sides and bearings above and below,

[0014] The track is provided with a groove and a pressing strip, the bearings roll in the groove, the groove is provided with a supporting surface on both sides for supporting the sliding parts on both sides of the chain, the pressing strip is pressed above the outside of the supporting surface, the outside sliding part slides between the pressing strip and the outside supporting surface, and the inside sliding part slides on the inside supporting surface,

[0015] The chain is provided with a needle plate inside for fixing the cloth,

[0016] The sliding parts are uniformly arranged along the length direction of the chain,

[0017] The bearings are uniformly arranged along the length direction of the chain,

[0018] The needle plate is uniformly arranged along the length direction of the chain;

[0019] The chain is composed of a plurality of chain units connected end to end, each chain unit includes at least two chain links, each chain link in the chain unit is connected end to end, and the connection between the chain links in the chain unit includes at least one horizontal connection, and the tail end of the last chain link in a first chain unit is connected perpendicularly to the head end of the first chain link in a second chain unit.

[0020] Further, the chain unit includes two chain links, the head end of the first chain link is connected perpendicularly to the tail end of the second chain link of the adjacent chain unit, and the tail end of the second chain link is connected perpendicularly to the head end of the first chain link of the adjacent chain unit.

[0021] Further, the first chain link or the second chain link is provided with a matching structure.

[0022] Optionally, the first chain link and the second chain link are respectively provided with a matching structure.

[0023] Further, the chain unit includes three chain links, the head end of the first chain link is connected perpendicularly to the tail end of the third chain link of the adjacent chain unit, the tail end of the first chain link is connected horizontally to the head end of the second chain link, the tail end of the second chain link is connected perpendicularly to the head end of the third chain link, and the tail end of the third chain link is connected perpendicularly to the head end of the first chain link of the adjacent chain unit.

[0024] Further, the first chain link, the second chain link, and the third chain link are respectively provided with a matching structure.

[0025] Optionally, the first chain link or the second chain link is provided with a matching structure, and the third chain link is provided with a matching structure.

[0026] Further, the chain link is in a plate structure and is arranged horizontally.

[0027] Taking a traditional chain with a straight pin shaft arranged horizontally as an example, since the chain links are connected perpendicularly, the chain can bend in the vertical plane, but it is difficult to bend in the horizontal direction. Therefore, the traditional chain is suitable for application scenarios in which the chain movement path is in a plane.

[0028] However, the traditional chain is difficult to apply to application scenarios in which the chain movement path exceeds a plane.

[0029] The chain unit and the chain unit can be horizontally connected, and the chain link and the chain link can be vertically connected, so that the chain can be bent in a vertical plane and can be bent in a horizontal plane.

[0030] Further, the chain link is a plate structure and is horizontally arranged, the first chain link is a three-layer plate structure, from top to bottom, the first plate piece, the second plate piece and the third plate piece,

[0031] The second chain link is a single-layer plate structure and comprises a fourth plate piece, a tail end of the fourth plate piece is arranged between head ends of the first plate piece and the third plate piece,

[0032] A tail end of the second plate piece is hinged with a head end of a fourth plate piece of a rear adjacent chain unit through a horizontally arranged horizontal pin shaft, a tail end of the fourth plate piece is rotationally connected with head ends of the first plate piece and the third plate piece through a vertically arranged vertical pin shaft, and a head end of the fourth plate piece is hinged with a tail end of a second plate piece of a front adjacent chain unit through a horizontally arranged horizontal pin shaft.

[0033] Further, a tail end of the second plate piece is fixedly installed with a sleeve, and a head end of the fourth plate piece is fixedly installed with a sleeve,

[0034] The sleeve arranged on the tail end of the second plate piece is coaxial with the sleeve arranged on the head end of the fourth plate piece in the rear adjacent chain unit,

[0035] The sleeve arranged on the head end of the fourth plate piece is coaxial with the sleeve arranged on the tail end of the second plate piece in the front adjacent chain unit,

[0036] The coaxial sleeves are all provided with horizontal pin shafts.

[0037] In order to prevent the chain from being separated when moving on the chain wheel, the chain conveying mechanism comprises a limiting assembly.

[0038] Further, the limiting assembly is a limiting baffle arranged on the chain wheel, the limiting baffle is provided with two pieces and is arranged on the inner side and the outer side of the chain wheel respectively,

[0039] The second matching structure is arranged between the inner side limiting baffle and the outer side limiting baffle,

[0040] The outer side surface of the inner side limiting baffle and the inner side surface of the outer side limiting baffle are respectively provided with bearing limiting portions, and the bearing is in contact with the bearing limiting portions.

[0041] Optionally, the limiting assembly is a limiting baffle arranged on the chain, the limiting baffle is provided with two pieces and is arranged on the inner side and the outer side of the chain respectively,

[0042] The first matching structure is arranged between the inner limiting baffle and the outer limiting baffle.

[0043] Further, the first matching structure is arranged in an arc shape, and an arc surface of the first matching structure is engaged with the arc-shaped groove on the second matching structure.

[0044] Further, the manufacturing material of the pressing strip is graphite.

[0045] The beneficial effects of the present application are as follows:

[0046] 1. The horizontal rotating connection structure between the chain units and the vertical rotating connection structure between the chain links effectively avoids abnormal wear of the chain, prolongs the service life of the tentering setting machine, enables the tentering setting machine to complete the cloth widening work in a shorter stroke, reduces the longitudinal length of the tentering setting machine, and saves working space.

[0047] 2. The bearings and the pressing strips arranged in the chain not only provide support points for the horizontal stress received by the chain, but also effectively prevent the chain from turning over due to the reaction force of the cloth during movement, thereby ensuring the working stability of the tentering setting machine.

[0048] 3. The limiting baffle arranged on the chain or the sprocket limits the movement path of the chain, prevents the chain from being separated from the sprocket during work, and further ensures the working stability of the tentering setting machine.

[0049] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0050] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor;

[0051] Figure 1 is a whole structure schematic view of a specific example of the tentering setting machine of the present application;

[0052] Figure 2 for Figure 1 is a top view structural schematic diagram of the tentering setting machine;

[0053] Figure 3 is a simple schematic diagram of the chain conveying mechanism;

[0054] Figure 4 is a structural schematic diagram of the chain and the sprocket cooperating with each other;

[0055] Figure 5 is a structural schematic diagram of a specific example of the first chain in the tentering setting machine of the utility model;

[0056] Figure 6 is a partial structural enlarged view of Figure 5 ;

[0057] Figure 7 is a structural schematic diagram of a specific example of the second chain in the tentering setting machine of the utility model;

[0058] Figure 8 is a partial structural enlarged view of Figure 7 ;

[0059] Figure 9 is a top view of Figure 5 ;

[0060] Figure 10 is a structural schematic diagram of the first chain with a bearing in the tentering setting machine of the utility model;

[0061] Figure 11 is a structural schematic diagram of the first chain cooperating with a track in the tentering setting machine of the utility model;

[0062] Figure 12 is a structural schematic diagram of the sprocket with a limiting baffle in the tentering setting machine of the utility model;

[0063] Figure 13 is a sectional structural schematic diagram of Figure 12 ;

[0064] Figure 14 is a structural schematic diagram of a specific example of the sprocket in the tentering setting machine of the utility model;

[0065] Figure 15 is a structural schematic diagram of the first cooperating structure with a limiting baffle in the tentering setting machine of the utility model;

[0066] In the figure: 101, second link (A); 102, first link (A); 104, fourth plate (A); 105, first plate (A); 106, vertical pin shaft (A); 107, first matching structure (A); 108, second sleeve; 110, bearing; 111, second plate (A); 112, third plate (A); 113, second support; 114, pressing piece; 115, needle plate; 116, first sliding part; 117, pressing strip; 118, mounting plate; 119, horizontal pin shaft (A); 120, first sleeve; 121, second sliding part; 122, first support; 201, second link (B); 202, first link (B); 203, sleeve (B); 204, vertical pin shaft (B); 205, fourth plate (B); 206, second plate (B); 207, first plate (B); 208, third plate (B); 209, first matching structure (B); 220, horizontal pin shaft (B); 300, chain wheel; 301, chain; 302, second matching structure; 303, first limiting baffle; 304, bearing limiting part; 312, second limiting baffle; 401, cloth feeding area equipment; 402, heat setting area equipment; 403, cloth discharging area equipment; 404, cloth conveying equipment; 405, chain conveying mechanism; 406, power device; 407, rack; 410, track. DETAILED DESCRIPTION

[0067] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clearly understood, the utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and do not limit the utility model.

[0068] The chain conveying mechanism of the utility model will be further described in combination with the drawings.

[0069] As shown in Figure 1 , Figure 2 and Figure 3 , the tentering setting machine described in the embodiment comprises a rack 407, the rack 407 is fixedly installed with cloth feeding area equipment 401, heat setting area equipment 402, cloth discharging area equipment 403 and cloth conveying equipment 404, the cloth conveying equipment 404 conveys the cloth from the cloth feeding area into the heat setting area and then from the heat setting area to the cloth discharging area.

[0070] The cloth conveying equipment 404 comprises a chain conveying mechanism 405 and a power device 406, the chain conveying mechanism 405 is provided with two sets side by side and moves synchronously, the power device 406 is connected with the chain conveying mechanism 405 and drives the movement of the chain conveying mechanism 405, and the power device 406 is a chain conveying mechanism driving motor.

[0071] The movement path of the fabric conveying device 404 includes a gradually widening section from the fabric entering point to the heat setting zone, and a parallel section from the heat setting zone to the fabric exiting point. The fabric entering point is the initial point of the fabric entering the fabric conveying device, and the fabric exiting point is the terminal point of the fabric exiting the fabric conveying device.

[0072] The distance between the two sets of parallel chain conveying mechanisms 405 gradually widens along the movement direction of the fabric on the gradually widening section, and remains unchanged along the movement direction of the fabric on the parallel section.

[0073] The chain conveying mechanism 405 includes a chain 301, a sprocket 300, and a track 410. The sprocket 300 includes a driving sprocket and a driven sprocket. The driving sprocket is installed at the front end of the frame 407, and the driven sprocket is installed at the rear end of the frame 407. Both the driving sprocket and the driven sprocket are horizontally arranged, and they are parallel to each other and installed at the same height.

[0074] Each set of chain conveying mechanism 405 is provided with two horizontally arranged tracks 410, which are parallel to each other and located above and below respectively.

[0075] A closed chain 301 includes four parts, namely, an A part meshing with the driving sprocket, a B part meshing with the driven sprocket, a C part of the horizontal section located above, and a D part of the horizontal section located below.

[0076] The track 410 located above corresponds to the C part of the chain 301, and the track 410 located below corresponds to the D part of the chain 301.

[0077] The chain 301 slides on the track 410.

[0078] The frame 407 is provided with a transverse guide rail and a swing mechanism. The transverse guide rail is arranged at the front end of the frame 407, and the driving mechanism mounting seat is arranged on the transverse guide rail. The driving sprocket and the motor driving the driving sprocket are both installed on the driving mechanism mounting seat. The swing mechanism includes a screw rod mechanism, which includes a nut and a screw rod. The nut is arranged on the driving mechanism mounting seat, and the frame is provided with a screw rod driving motor. The screw rod is connected with the screw rod driving motor.

[0079] The front end of the chain conveying mechanism 405 is horizontally swing arranged, and the swing mechanism described above is used to push the chain conveying mechanism 405 to swing on the horizontal plane. The chain conveying mechanism 405 swings with the change of the position of the fabric edge.

[0080] As shown in Figure 4 , the chain 301 meshes with the sprocket 300, and the chain 301 is driven by the sprocket 300. The specific embodiment of the first chain 301 is shown in Figure 5 and Figure 6As shown in the figure, a section of chain is placed horizontally on a plane. The first type of chain 301 is composed of multiple chain units with the same structure connected end to end. Each chain unit includes two links, which are plate-shaped structures and horizontally arranged, namely the second link (A) 101 and the first link (A) 102.

[0081] The first end of the second link (A) 101 is vertically rotatably connected to the tail end of the first link (A) 102 of the adjacent chain unit on the front side. The tail end of the second link (A) 101 is horizontally rotatably connected to the first end of the first link (A) 102. The tail end of the first link (A) 102 is vertically rotatably connected to the front end of the first link (A) 102 of the adjacent chain unit on the rear side.

[0082] The first link (A) 102 is a three-layer plate structure, consisting of the first plate (A) 105, the second plate (A) 111, and the third plate (A) 112 from top to bottom.

[0083] The second link (A) 101 is a single-layer plate structure, including a fourth plate (A) 104, the tail end of which is located between the head ends of the first plate (A) 105 and the third plate (A) 112.

[0084] The first end of the fourth plate (A) 104 is hinged to the tail end of the second plate (A) 111 of the adjacent chain unit on the front side via a horizontally set horizontal pin (A) 119. The tail end of the fourth plate (A) 104 is rotatably connected to the first plate (A) 105 and the first end of the third plate (A) 112 via a vertically set vertical pin (A) 106. The tail end of the second plate (A) 111 is hinged to the first end of the fourth plate (A) 104 of the adjacent chain unit on the rear side via a horizontally set horizontal pin (A) 119.

[0085] A mating structure (A) 107 is provided on the end face of the first plate (A) 105 and the third plate (A) 112 away from the second plate (A) 111.

[0086] Mounting plates 118 are provided on both the upper and lower end faces of the fourth plate (A) 104. The two mounting plates 118 are symmetrical about the fourth plate (A) 104. A first mating structure (A) 107 is provided on the end face of the mounting plate 118 away from the fourth plate (A) 104.

[0087] like Figure 9 As shown, 104 and 111 are vertically rotatably connected. The front end of 104 is provided with a first sleeve 120, and the rear end of 111 is provided with a second sleeve 108. The first sleeve 120 and the second sleeve 108 are coaxial.

[0088] A horizontal pin (A) 119 is disposed within a coaxial first sleeve 120 and second sleeve 108.

[0089] As Figure 10 shown, the first plate (A) 105 and the third plate (A) 112 are provided with a bearing 110 on the end face away from the second plate (A) 111, and the mounting plate 118 is provided with a bearing 110 on the end face away from the fourth plate (A) 104.

[0090] The specific embodiment of the second chain 301 is shown in Figure 7 and Figure 8 As shown, a section of the chain is horizontally placed on a plane, and the second chain 301 is composed of a plurality of chain units connected in sequence, and each chain unit includes two chain links, which are horizontally arranged and are respectively the second chain link (B) 201 and the first chain link (B) 202.

[0091] The head end of the second chain link (B) 201 is vertically connected to the tail end of the first chain link (B) 202 of the chain unit adjacent to the front side, the tail end of the second chain link (B) 201 is horizontally connected to the head end of the first chain link (B) 202, and the tail end of the first chain link (B) 202 is vertically connected to the head end of the second chain link (B) 201 of the chain unit adjacent to the rear side.

[0092] The first chain link (B) 202 is a three-layer plate structure, and from top to bottom, it includes the first plate (B) 207, the second plate (B) 206, and the third plate (B) 208.

[0093] The second chain link (B) 201 is a single-layer plate structure, and includes the fourth plate (B) 205, and the tail end of the fourth plate (B) 205 is arranged between the head ends of the first plate (B) 207 and the third plate (B) 208.

[0094] The head end of the fourth plate (B) 205 is hinged to the tail end of the second plate (B) 206 of the chain unit adjacent to the front side through a horizontally arranged horizontal pin shaft (B) 220, the tail end of the fourth plate (B) 205 is rotationally connected to the head ends of the first plate (B) 207 and the third plate (B) 208 through a vertically arranged vertical pin shaft (B) 204, and the tail end of the second plate (B) 206 is hinged to the head end of the fourth plate (B) 205 of the chain unit adjacent to the rear side through a horizontally arranged horizontal pin shaft (B) 220.

[0095] The first plate (B) 207 and the third plate (B) 208 are provided with a first matching structure (B) 209 on the end face away from the second plate (B) 206.

[0096] The first matching structure (B) 209 is arranged in an arc shape, and the arc surface of the first matching structure (B) 209 is engaged with the second matching structure on the sprocket.

[0097] As Figure 11As shown, the chain 301 slides in the track 410, the track 410 is provided with a groove, the inner side of the groove is fixedly provided with the abutting part 114, the bearing 110 rolls in the groove, and the bearing 110 is in contact with the abutting surface of the abutting part 114. The two sides of the groove are respectively provided with support parts, the support part on the inner side is the first support part 122, and the support part on the outer side is the second support part 113.

[0098] The track 410 is provided with the pressing strip 117, and the pressing strip 117 is arranged above the second support part 113.

[0099] The inner side of the chain 301 is provided with the first sliding part 116, and the outer side of the chain 301 is provided with the second sliding part 121. The first sliding part 116 slides on the support surface of the first support part 122, and the second sliding part 121 slides between the support surface of the second support part 113 and the pressing strip 117.

[0100] The first sliding part 116 is fixedly provided with the needle plate 115.

[0101] The first sliding part 116, the second sliding part 121 and the needle plate 115 are arranged on each chain link unit, and the first sliding part 116, the second sliding part 121 and the needle plate 115 are uniformly arranged along the length direction of the chain.

[0102] The pressing strip 117, the first support part 122, the second support part 113 and the abutting part 114 are made of graphite.

[0103] In order to prevent the chain from being separated when moving on the sprocket, the chain conveying mechanism comprises a limiting assembly.

[0104] As shown in Figure 12 and Figure 13 , the limiting assembly is a first limiting baffle 303 arranged on the sprocket 300. The first limiting baffle 303 is provided with two pieces, which are respectively arranged on the inner side and the outer side of the sprocket 300.

[0105] The sprocket 300 is provided with a second cooperation structure 302 arranged between the inner side first limiting baffle 303 and the outer side first limiting baffle 303.

[0106] The outer side surface of the inner side first limiting baffle 303 and the inner side surface of the outer side first limiting baffle 303 are respectively provided with bearing limiting parts 304.

[0107] The bearing limiting part 304 is composed of the raised surface on the outer side surface of the inner side first limiting baffle 303 and the raised surface on the inner side surface of the outer side first limiting baffle 303. The bearing is in contact with the bearing limiting part 304.

[0108] As shown in Figure 14 and Figure 15As shown, the limiting assembly is provided on the second limiting baffle 312 on the chain 301, the second limiting baffle 312 is provided with two pieces, and is respectively provided on the inner side and the outer side of the chain 301.

[0109] The first matching structure (A) 107 or the first matching structure (B) 209 is arranged between the inner second limiting baffle 312 and the outer second limiting baffle 312.

[0110] The first matching structure (A) 107 is provided in an arc shape, and the arc surface of the first matching structure (A) 107 is engaged with the arc groove on the second matching structure 302.

[0111] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art in the technical range disclosed by the present application, according to the technical scheme and the utility model concept of the present application, is equivalent to replace or change, should be covered in the protection scope of the present application.

Claims

1. Tentering machine based on a chain suitable for a three-dimensional path, comprising an entry zone device, a heat setting zone device, an exit zone device and a fabric conveying device which transfers the fabric from the entry zone into the heat setting zone and from the heat setting zone to the exit zone, characterized in that, The cloth conveying device comprises two sets of chain conveying mechanisms arranged side by side and moving synchronously, and a power device for driving the movement of the chain conveying mechanisms, The movement path of the cloth conveying device comprises a gradually widening section from a cloth inlet point to a heat setting section, and a parallel section from entering the heat setting section to a cloth outlet point, the cloth inlet point being the initial point of the cloth entering the cloth conveying device, and the cloth outlet point being the terminal point of the cloth exiting the cloth conveying device, The distance between the two sets of chain conveying mechanisms arranged side by side gradually widens along the movement direction of the cloth on the gradually widening section, and the distance between the two sets of chain conveying mechanisms arranged side by side remains unchanged along the movement direction of the cloth on the parallel section, The front end of the chain conveying mechanism is horizontally swingable, The chain conveying mechanism comprises a chain, a sprocket and a track, the chain is provided with a first matching structure, the sprocket is provided with a second matching structure, and the chain is engaged with the sprocket through the cooperation of the first matching structure and the second matching structure; The chain slides on the track, the inner side of the chain is in contact with the inner side wall of the track, the inner side of the chain is provided with a needle plate, the chain is composed of a plurality of chain units which are connected end to end and have the same structure, each chain unit comprises at least two chain links, the chain links in the chain unit are rotationally connected end to end, and the rotational connection in the chain unit comprises at least one horizontal rotational connection, the tail end of the last chain link of a first chain unit in adjacent two chain units is rotationally connected with the head end of a first chain link of a second chain unit.

2. The tenter based on a chain suitable for a three-dimensional path according to claim 1, characterized in that, The chain is provided with sliding parts on both sides, bearings are arranged above and below, the track is provided with grooves and pressing strips, the bearings roll in the grooves, the grooves are respectively provided with supporting surfaces for supporting the sliding parts on both sides of the chain, the pressing strips are pressed above the outer side of the supporting surfaces, the outer side sliding part slides between the pressing strip and the outer side supporting surface, and the inner side sliding part slides on the inner side supporting surface.

3. The tenter stretching machine based on a chain suitable for a three-dimensional path according to claim 1, characterized in that, The chain unit comprises two chain links, the head end of the first chain link is rotationally connected with the tail end of the second chain link of the chain unit adjacent to the front side, the tail end of the second chain link is rotationally connected with the head end of the first chain link of the chain unit adjacent to the rear side, and the first chain link and / or the second chain link is provided with a first matching structure.

4. The tenter stretching machine based on a chain suitable for a three-dimensional path according to claim 1, characterized in that, The chain unit comprises three chain links, the head end of the first chain link is rotationally connected with the tail end of the third chain link of the chain unit adjacent to the front side, the tail end of the first chain link is rotationally connected with the head end of the second chain link, the tail end of the second chain link is rotationally connected with the head end of the third chain link, and the tail end of the third chain link is rotationally connected with the head end of the first chain link of the chain unit adjacent to the rear side.

5. The tenter based on a chain suitable for a three-dimensional path according to claim 4, characterized in that, The first chain link, the second chain link and the third chain link are respectively provided with a first matching structure.

6. The tenter based on a chain suitable for a three-dimensional path according to claim 4, characterized in that, The first chain link or the second chain link is provided with a matching structure, and the third chain link is provided with a first matching structure.

7. The tenter stretching machine based on a chain suitable for a three-dimensional path according to claim 1, characterized in that, The chain link is a plate structure and is arranged horizontally.

8. The tenter based on a chain suitable for a three-dimensional path according to claim 3, characterized in that, The chain link is a plate structure and is arranged horizontally, the first chain link is a three-layer plate structure, and the first plate piece, the second plate piece and the third plate piece are arranged from top to bottom, The second chain link is a single-layer plate structure and comprises a fourth plate piece, the tail end of the fourth plate piece is arranged between the head ends of the first plate piece and the third plate piece, The tail end of the second plate piece is hinged with the head end of the fourth plate piece of the rear adjacent chain unit through a horizontally arranged horizontal pin shaft, the tail end of the fourth plate piece is rotationally connected with the head ends of the first plate piece and the third plate piece through a vertically arranged vertical pin shaft, and the head end of the fourth plate piece is hinged with the tail end of the second plate piece of the front adjacent chain unit through a horizontally arranged horizontal pin shaft.

9. The tenter based on a chain suitable for a three-dimensional path according to claim 1, characterized in that, The chain conveying mechanism comprises limiting baffle plates arranged on the chain wheels, the limiting baffle plates are provided with two pieces, and are arranged on the inner sides and the outer sides of the chain wheels respectively, The second matching structure is arranged between the inner limiting baffle plate and the outer limiting baffle plate, The outer side of the inner limiting baffle plate and the inner side of the outer limiting baffle plate are respectively provided with bearing limiting portions, and the bearing is in contact with the bearing limiting portions.

10. The tenter stretching machine based on a chain suitable for a three-dimensional path according to claim 1, characterized in that, The chain conveying mechanism comprises limiting baffle plates arranged on the chain wheels, the limiting baffle plates are provided with two pieces, and are arranged on the inner sides and the outer sides of the chain wheels respectively, The first matching structure is arranged between the inner limiting baffle plate and the outer limiting baffle plate.

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