Automatic stretching machine for chain link fence

Abstract

The embodiment of the present application discloses an automatic mesh pulling machine for a chain link fence, comprising: a base support; a mesh pulling mechanism support is arranged on the base support; a mesh pulling mechanism and a first inclined frame and a second inclined frame for placing the chain link fence are arranged on the mesh pulling mechanism support; the mesh pulling mechanism is located between the first inclined frame and the second inclined frame; the mesh pulling mechanism comprises a bearing seat and a cylindrical shaft; two bearing seats are symmetrically fixed on the left and right sides of the mesh pulling mechanism support respectively; the cylindrical shaft is located between the two bearing seats, and the two ends of the cylindrical shaft are rotatably connected to the bearing seat through sleeves respectively; an eccentric shaft is arranged in the cylindrical shaft; a plurality of guide posts for pulling the chain link fence are arranged along the circumferential direction on the cylindrical shaft; one end of the guide post is embedded in the cylindrical shaft and contacts with the eccentric shaft. The present invention effectively improves the transmission accuracy of the mesh pulling machine to ensure the precise movement of the chain link fence, and at the same time can ensure that the chain link fence is not scratched.

Description

Technical Field

[0001] The present application relates to the technical field of mesh-pulling machines, and in particular to an automatic mesh-pulling machine for chain link fences. Background Art

[0002] Chain link fence is a semi-finished metal mesh made of multiple "elliptical spiral wires" that are woven together in a spiral. The steel wires intersect to form a diamond shape, also known as a diamond mesh. It is mainly used for fences on some courts, breeding protection nets, zoo protection nets, and residential security protection. The shape of the chain link fence is as follows: Fig. 9 shown.

[0003] The automated processing steps of chain link fence mainly consist of five processes, including: weaving, stretching, edge locking, rolling and bagging. In the machine processing, the stretching machine is responsible for pulling the woven chain link fence into the edge locking and rolling machine to ensure that the chain link fence enters the next process. At present, the existing stretching machine has low transmission accuracy and cannot achieve accurate movement of the chain link fence. At the same time, the chain link fence also has the risk of being scratched. Therefore, the present invention proposes an automatic stretching machine for chain link fence. Summary of the invention

[0004] The embodiment of the present application provides an automatic mesh-pulling machine for a chain link fence, which effectively improves the transmission accuracy of the mesh-pulling machine to ensure the precise movement of the chain link fence, while also ensuring that the chain link fence is not scratched.

[0005] In view of this, the present application provides an automatic chain link fence pulling machine, comprising: a base support;

[0006] The base support is provided with a net pulling mechanism support;

[0007] The net pulling mechanism bracket is provided with a net pulling mechanism and a first inclined frame and a second inclined frame for placing the chain link fence;

[0008] The net pulling mechanism is located between the first inclined frame and the second inclined frame;

[0009] The net-pulling mechanism comprises a bearing seat and a cylindrical shaft;

[0010] The two bearing seats are symmetrically fixed on the left and right sides of the net pulling mechanism bracket respectively;

[0011] The cylindrical shaft is located between the two bearing seats, and both ends of the cylindrical shaft are rotatably connected to the bearing seats through sleeves respectively;

[0012] An eccentric shaft is arranged inside the cylindrical shaft;

[0013] A plurality of guide posts for pulling the chain link fence are arranged on the cylindrical shaft along the circumferential direction;

[0014] One end of the guide column is embedded in the cylindrical shaft and contacts the eccentric shaft.

[0015] Optionally, a slot for installing the guide column is provided on the cylindrical shaft.

[0016] Optionally, the guide column includes a cylindrical pin, a spring, a fixing sleeve and a nut;

[0017] The cylindrical pin comprises a cylindrical section and a conical section located at the bottom of the cylindrical section;

[0018] The radius of the top surface of the conical section is greater than the radius of the cylindrical section;

[0019] The spring is sleeved on the cylindrical section, and the lower end of the spring abuts against the top surface of the conical section;

[0020] The fixing sleeve comprises a small diameter section and a large diameter section located at the bottom of the small diameter section;

[0021] A groove for supporting the upper end of the spring is provided at the bottom of the large diameter section;

[0022] A through hole is provided at the center of the small diameter section;

[0023] The radius of the through hole is equal to the radius of the cylindrical segment;

[0024] The fixing sleeve is sleeved on the cylindrical pin, and the fixing sleeve is located above the spring;

[0025] The outer side of the small diameter section is provided with an external thread;

[0026] The inner side of the nut is provided with an internal thread matching the external thread;

[0027] The guide column is fixed on the notch through the nut.

[0028] Optionally, a roller for reducing contact friction between the guide column and the eccentric shaft is provided at the bottom of the conical section.

[0029] Optionally, a plurality of guide posts are evenly arranged on the cylindrical shaft along the circumferential direction.

[0030] Optionally, the left and right sides of the first oblique frame are correspondingly provided with edge locking mechanisms;

[0031] The edge locking mechanism is fixedly connected to the net pulling mechanism bracket.

[0032] Optionally, an active power mechanism is also provided on the base support;

[0033] The source power mechanism is driven and connected to the net pulling mechanism.

[0034] Optionally, the source power mechanism is driven and connected to the net-pulling mechanism via a transmission member.

[0035] Optionally, the transmission member is a synchronous belt.

[0036] Optionally, the source power mechanism is a stepping motor.

[0037] It can be seen from the above technical scheme that the embodiment of the present application has the following advantages: it includes a base bracket, a mesh pulling mechanism bracket is arranged on the base bracket, a mesh pulling mechanism and a first inclined frame and a second inclined frame for placing the chain link fence are arranged on the mesh pulling mechanism bracket, the mesh pulling mechanism is located between the first inclined frame and the second inclined frame, the mesh pulling mechanism includes a bearing seat and a cylindrical shaft, the two bearing seats are symmetrically fixed on the left and right sides of the mesh pulling mechanism bracket, the cylindrical shaft is located between the two bearing seats, and the two ends of the cylindrical shaft are respectively rotatably connected to the bearing seat through a sleeve; an eccentric shaft is arranged in the cylindrical shaft, and a plurality of guide posts for pulling the chain link fence are arranged on the cylindrical shaft along the circumferential direction, one end of the guide post is embedded in the cylindrical shaft and contacts with the eccentric shaft. The present invention uses the cam principle and uses the eccentric shaft to drive the guide post to extend and retract back and forth, which effectively improves the transmission accuracy of the mesh pulling mechanism and realizes the precise movement of the chain link fence. At the same time, the use of the guide post to pull the chain link fence can effectively prevent the chain link fence from being scratched during the pulling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the structure of an automatic mesh-pulling machine for a chain link fence in an embodiment of the present application;

[0039] Figure 2 This is a structural schematic diagram of the net-pulling mechanism in the embodiment of the present application;

[0040] Figure 3 It is a cross-sectional view of a cylindrical shaft in an embodiment of the present application;

[0041] Figure 4 This is a schematic diagram of the structure of the guide column in the embodiment of the present application;

[0042] Figure 5 for Figure 4 A partial enlarged view of part A;

[0043] Figure 6 An exploded view of a guide column in an embodiment of the present application;

[0044] Figure 7 This is a schematic diagram of the structure when the guide column is located at the near rest point in the embodiment of the present application;

[0045] Figure 8 This is a schematic diagram of the structure of the cylindrical shaft in the embodiment of the present application;

[0046] Fig. 9 It is a structural schematic diagram of a woven chain link fence in the prior art;

[0047] Wherein, the accompanying drawings are marked as follows:

[0048] 1-base bracket, 2-net pulling mechanism bracket, 3-source power mechanism, 4-locking mechanism, 5-net pulling mechanism, 6-hook flower fence, 7-second oblique frame, 8-first oblique frame, 9-synchronous belt, 51-bearing seat, 52-cylindrical shaft, 53-guide column, 54-eccentric shaft, 521-notch, 531-cylindrical pin, 532-spring, 533-fixing sleeve, 534-nut, 535-roller. DETAILED DESCRIPTION

[0049] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0050] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0051] Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] The inventor found that there are two main types of existing mesh pulling machines: one is that the chain link fence is placed on the flat belt surface, and the flat belt is used to pull the chain link fence into the next process; the other is that the gear or sprocket is used to pull the chain link fence into the next process. The technical solution of using the flat belt to pull the chain link fence has the following defects: first, the flat belt itself has elasticity, and it is easy to slip after a long period of movement, which affects the transmission accuracy and cannot keep the time of each rotation cycle the same, resulting in the inability to perfectly periodically coordinate the processes of pulling the net and locking the edge - the two processes complete their respective tasks in sequence within the corresponding time; second, when the length of the chain link fence is long, a long flat belt is required, which occupies a large space. If a short flat belt is used, because the front part of the chain link fence is directly placed on the flat belt surface, the friction between the chain link fence and the flat belt is small, which makes it difficult to pull the rear part of the chain link fence. The technical solution of pulling the chain link fence by rotating gears or sprockets has defects: first, the gear or sprocket teeth are prone to scratching the chain link fence and hooking the mesh after contacting and pulling the chain link fence; second, during the pulling process, the node of the chain link fence needs to be located in the middle of the width of the gear teeth. When facing chain link fences with different mesh sizes, the axial position of the gear or sprocket needs to be adjusted, which is more troublesome.

[0053] This application provides an embodiment of an automatic chain link fence stretching machine. Figures 1 to 3 .

[0054] The automatic mesh pulling machine of the chain link fence in this embodiment includes: a base bracket 1, a mesh pulling mechanism bracket 2 is arranged on the base bracket 1, a mesh pulling mechanism 5 and a first inclined frame 8 and a second inclined frame 7 for placing the chain link fence 6 are arranged on the mesh pulling mechanism bracket 2, the mesh pulling mechanism 5 is located between the first inclined frame 8 and the second inclined frame 7, the mesh pulling mechanism 5 includes a bearing seat 51 and a cylindrical shaft 52, the two bearing seats 51 are symmetrically fixed on the left and right sides of the mesh pulling mechanism bracket 2, the cylindrical shaft 52 is located between the two bearing seats 51, and the two ends of the cylindrical shaft 52 are rotatably connected to the bearing seats 51 through sleeves; an eccentric shaft 54 ​​is arranged in the cylindrical shaft 52, and a plurality of guide posts 53 for pulling the chain link fence 6 are circumferentially arranged on the cylindrical shaft 52, one end of the guide post 53 is embedded in the cylindrical shaft 52 and contacts with the eccentric shaft 54.

[0055] It should be noted that the present invention adopts the cam principle and utilizes the eccentric shaft 54 ​​to drive the guide column 53 to extend and retract back and forth, which effectively improves the transmission accuracy of the mesh pulling mechanism 5 and realizes the precise movement of the chain link fence 6. At the same time, the guide column 53 is used to pull the chain link fence 6, and its columnar structure can effectively prevent the chain link fence 6 from being scratched during the pulling process.

[0056] The above is an embodiment of the present invention provided by the embodiment of the automatic mesh pulling machine of a chain link fence. The following is an embodiment of the present invention provided by the embodiment of the automatic mesh pulling machine of a chain link fence. For details, please refer to Figures 1 to 8 .

[0057] The automatic mesh pulling machine of the chain link fence in this embodiment includes: a base bracket 1, a mesh pulling mechanism bracket 2 is arranged on the base bracket 1, a mesh pulling mechanism 5 and a first inclined frame 8 and a second inclined frame 7 for placing the chain link fence 6 are arranged on the mesh pulling mechanism bracket 2, the mesh pulling mechanism 5 is located between the first inclined frame 8 and the second inclined frame 7, the mesh pulling mechanism 5 includes a bearing seat 51 and a cylindrical shaft 52, the two bearing seats 51 are symmetrically fixed on the left and right sides of the mesh pulling mechanism bracket 2, the cylindrical shaft 52 is located between the two bearing seats 51, and the two ends of the cylindrical shaft 52 are rotatably connected to the bearing seats 51 through sleeves; an eccentric shaft 54 ​​is arranged in the cylindrical shaft 52, and the central axis of the eccentric shaft 54 ​​does not coincide with the central axis of the cylindrical shaft 52; a plurality of guide posts 53 for pulling the chain link fence 6 are circumferentially arranged on the cylindrical shaft 52, and one end of the guide post 53 is embedded in the cylindrical shaft 52 and contacts with the eccentric shaft 54.

[0058] It should be noted that: Figure 3 As shown, with the movement of the cylindrical shaft 52, the guide column 53 will reciprocate between the far rest point of the eccentric shaft 54 ​​(the farthest distance between the eccentric shaft 54 ​​and the cylindrical shaft 52) ​​and the near rest point (the closest distance between the eccentric shaft 54 ​​and the cylindrical shaft 52). By adopting the concept of eccentric design, the back-and-forth telescopic movement of the guide column 53 presents periodic changes, that is, the rotation angle and time of each back-and-forth telescopic movement are fixed. Specifically, each rotation angle from the near rest point to the far rest point is 120°, and the time is 1 / 3T (rotation period); each rotation angle from the far rest point to the near rest point is 240°, and the time is 2 / 3T (rotation period), that is, the arc length of a rotation of 120° is the displacement of pulling the chain link fence 6, and the pulling displacement is exactly the radial spacing between the nodes of the chain link fence 6. Therefore, each time it moves from the near rest point to the far rest point, the displacement of pulling the chain link fence 6 is the radial distance between the nodes of the chain link fence 6, so that the chain link fence 6 can be pulled accurately into the locking mechanism 4.

[0059] like Figure 8 As shown, a notch 521 for mounting the guide post 53 is formed on the cylindrical shaft 52 .

[0060] like Figure 4 , Figure 6As shown, the guide column 53 includes a cylindrical pin 531, a spring 532, a fixing sleeve 533 and a nut 534. The cylindrical pin 531 includes a cylindrical section and a conical section located at the bottom of the cylindrical section. The radius of the top surface of the conical section is greater than the radius of the cylindrical section. The spring 532 is sleeved on the cylindrical section, and the lower end of the spring 532 is abutted against the top surface of the conical section; the fixing sleeve 533 includes a small diameter section and a large diameter section located at the bottom of the small diameter section. A groove for abutting the upper end of the spring 532 is provided at the bottom of the large diameter section. A through hole is provided at the center of the small diameter section. The radius of the through hole is equal to the radius of the cylindrical section. The fixing sleeve 533 is sleeved on the cylindrical pin 531, and the fixing sleeve 533 is located above the spring 532.

[0061] It should be noted that when the guide post 53 rotates with the cylindrical shaft 52, the guide post 53 moves from the far rest point to the near rest point of the eccentric shaft 54. During this movement, the cylindrical pin 531 of the guide post 53 is gradually pushed out by the eccentric shaft 54. As the cylindrical pin 531 slowly extends out, when the guide post 53 is at the near rest point (such as Figure 7 As shown in the figure, part of the cylindrical pin 531 is located above the chain link fence 6 (i.e., the horizontal height of the cylindrical pin 531 is higher than the chain link fence 6), thereby pulling the chain link fence 6, and then the guide column 53 moves from the near rest point to the far rest point of the eccentric shaft 54. During this movement, the guide column 53 pulls the chain link fence 6. As the cylindrical pin 531 is gradually pulled back by the spring 532, the cylindrical pin 531 will retract until the horizontal height of the cylindrical pin 531 is lower than the chain link fence 6, thereby releasing the chain link fence 6. The back-and-forth telescopic movement of the cylindrical pin 531 can further prevent the guide column 53 from hooking and damaging the chain link fence 6.

[0062] An external thread is arranged on the outside of the small diameter section, and an internal thread matching the external thread is arranged on the inside of the nut 534 . The guide column 53 is fixed on the notch 521 through the nut 534 .

[0063] It should be noted that: by using nuts 534 to install the guide posts 53 on the notches 521 of the cylindrical shaft 52, the axial (horizontal) spacing of the guide posts 53 can be easily adjusted, so that the net-pulling mechanism 5 can be applied to the production of chain link fences 6 with meshes of different specifications, and has strong applicability and versatility. Specifically, when facing chain link fences 6 with meshes of different specifications, it is only necessary to unscrew the nuts 534 inside the guide posts 53, and the axial (horizontal) distance of each guide post 53 can be adjusted on the notches 521 of the cylindrical shaft 52, so as to adjust the axial spacing between the nodes of the chain link fence 6.

[0064] like Figure 5 As shown, a roller 535 for reducing the contact friction between the guide column 53 and the eccentric shaft 54 ​​is provided at the bottom of the cone section. By providing the roller 535, the wear caused by the contact friction between the guide column 53 and the eccentric shaft 54 ​​can be reduced.

[0065] A plurality of guide posts 53 are evenly arranged on the cylindrical shaft 52 along the circumferential direction.

[0066] Specifically, the left and right sides of the first oblique frame 8 are correspondingly provided with edge locking mechanisms 4 , and the edge locking mechanisms 4 are fixedly connected to the net pulling mechanism bracket 2 .

[0067] A source power mechanism 3 is also provided on the base support 1 , and the source power mechanism 3 drives and connects the net pulling mechanism 5 .

[0068] Specifically, the source power mechanism 3 is connected to the net-pulling mechanism 5 through a transmission member, wherein the transmission member may be a synchronous belt 9, and the source power mechanism 3 may be a stepping motor.

[0069] In specific implementation, the chain link fence 6 that has been woven but not locked is placed on the first inclined frame 8; the stepper motor is started, and the stepper motor drives the cylindrical shaft 52 to rotate through the synchronous pulley and the synchronous belt 9. At this time, the guide column 53 of the net pulling mechanism 5 rotates continuously following the cylindrical shaft 52; the guide column 53 pulls the chain link fence 6 during the rotation, and the edge of the pulled chain link fence 6 enters the locking mechanism 4 to complete the locking process; the chain link fence 6 that has completed the locking process is continuously pulled to the second inclined frame 7. The purpose and function of the net pulling mechanism 5 is to accurately and quickly pull the chain link fence 6 into the locking process.

[0070] The automatic mesh-pulling machine uses the cam principle, adopts an eccentric design (eccentric shaft 54) and cooperates with the cylindrical pin 531 to telescope back and forth, so that the mesh-pulling efficiency of the mesh-pulling machine is high, and the transmission precision is high, which can well solve the defect of low transmission precision caused by belt slippage in the prior art, and realize the precise movement of the chain link fence 6. At the same time, the mesh-pulling machine is not affected by the length of the chain link fence 6 and does not need to occupy a large space; the cylindrical pin 531 in the guide column 53 telescopes back and forth to avoid the hooking and damage problems between the mesh-pulling mechanism 5 and the chain link fence 6. At the same time, the guide column 53 can be conveniently moved axially, so that the mesh-pulling mechanism 5 can be applied to the production of chain link fences 6 with different mesh sizes. The mesh-pulling machine can save production costs to a great extent, improve production efficiency, space utilization and quality level.

[0071] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An automatic chain link fence stretching machine, characterized in that: include: Base bracket; The base support is provided with a net pulling mechanism support; The net pulling mechanism bracket is provided with a net pulling mechanism and a first inclined frame and a second inclined frame for placing the chain link fence; The net pulling mechanism is located between the first inclined frame and the second inclined frame; The net-pulling mechanism comprises a bearing seat and a cylindrical shaft; The two bearing seats are symmetrically fixed on the left and right sides of the net pulling mechanism bracket respectively; The cylindrical shaft is located between the two bearing seats, and both ends of the cylindrical shaft are rotatably connected to the bearing seats through sleeves respectively; An eccentric shaft is arranged inside the cylindrical shaft; A plurality of guide posts for pulling the chain link fence are arranged on the cylindrical shaft along the circumferential direction; One end of the guide column is embedded in the cylindrical shaft and contacts the eccentric shaft; The cylindrical shaft is provided with a notch for installing the guide column; The guide column comprises a cylindrical pin, a spring, a fixing sleeve and a nut; The cylindrical pin comprises a cylindrical section and a conical section located at the bottom of the cylindrical section; The radius of the top surface of the conical section is greater than the radius of the cylindrical section; The spring is sleeved on the cylindrical section, and the lower end of the spring abuts against the top surface of the conical section; The fixing sleeve comprises a small diameter section and a large diameter section located at the bottom of the small diameter section; A groove for supporting the upper end of the spring is provided at the bottom of the large diameter section; A through hole is provided at the center of the small diameter section; The radius of the through hole is equal to the radius of the cylindrical segment; The fixing sleeve is sleeved on the cylindrical pin, and the fixing sleeve is located above the spring; The outer side of the small diameter section is provided with an external thread; The inner side of the nut is provided with an internal thread matching the external thread; The guide column is fixed to the notch by the nut; A plurality of guide posts are evenly arranged on the cylindrical shaft along the circumferential direction; When the guide column rotates with the cylindrical shaft, the guide column will move from the far rest point to the near rest point of the eccentric shaft, and during this movement, the cylindrical pin of the guide column will be gradually pushed out by the eccentric shaft, and as the cylindrical pin extends, when the guide column is located at the near rest point, part of the cylindrical pin is located on the chain link fence, thereby pulling the chain link fence, and then the guide column moves from the near rest point to the far rest point of the eccentric shaft, and during this movement, the guide column pulls the chain link fence, and as the cylindrical pin is gradually pulled back by the spring, the cylindrical pin will retract until the horizontal height of the cylindrical pin is lower than the chain link fence, thereby loosening the chain link fence.

2. The automatic chain link fence stretching machine according to claim 1, characterized in that: A roller for reducing the contact friction between the guide column and the eccentric shaft is arranged at the bottom of the conical section.

3. The automatic chain link fence stretching machine according to claim 1, characterized in that: The left and right sides of the first oblique frame are correspondingly provided with edge locking mechanisms; The edge locking mechanism is fixedly connected to the net pulling mechanism bracket.

4. The automatic chain link fence stretching machine according to claim 1, characterized in that: The base support is also provided with an active power mechanism; The source power mechanism is driven and connected to the net pulling mechanism.

5. The automatic chain link fence stretching machine according to claim 4, characterized in that: The source power mechanism is driven and connected to the net-pulling mechanism through a transmission member.

6. The automatic chain link fence stretching machine according to claim 5, characterized in that: The transmission member is a synchronous belt.

7. The automatic chain link fence stretching machine according to claim 4, characterized in that: The source power mechanism is a stepping motor.

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