Pipe fitting packaging box size case quick switching limiting and fixing device

Abstract

The utility model discloses a kind of pipe fitting packaging box size case quick switching limit fixing device, including roller conveyor, front side guide limit plate and rear side guide limit plate are symmetrically equipped on roller conveyor front and back, two guide limit plates are symmetrically equipped with two connecting plates outward, waist type hole is set on each connecting plate, handle is equipped in the cooperation place of roller conveyor and connecting plate, connecting plate is fixed on roller conveyor by handle through waist shape hole, limit fixing mechanism for limiting four corners of production pipe fitting packaging box located in the center of roller conveyor front and back direction is equipped in the front and back of the overall frame of roller conveyor, size case switching mechanism is equipped in the overall frame of roller conveyor front and back, the utility model design is novel, conception is reasonable, mainly has the effect of conveying and limiting fixation to pipe fitting packaging size case and possesses the function of size case quick switching, while simple structure, save cost, environmental dependency is very small, easy to operate, convenient to operate.

Description

Technical Field

[0001] This utility model relates to the technical field of PPR pipe fitting production and packaging, specifically to a quick-switching and limiting fixing device for pipe fitting packaging boxes of different sizes. Background Technology

[0002] In the production and packaging process of PPR pipe fittings, a fixed number of fittings are first bagged and sealed to form bagged fittings before being boxed. Because of air pockets and gaps within the bagged fittings, the bagged fittings inside the box need to be leveled and compacted before sealing the entire box to prevent bulging during sealing. To ensure accurate leveling of the bagged fittings in a fixed area, a device is needed to limit and fix the box in one position to prevent breakage during leveling. Furthermore, since there are large and small boxes available, this device needs to be able to quickly switch between them to reduce changeover time and improve production and packaging efficiency. Utility Model Content

[0003] In view of the problems existing in the prior art, the purpose of this utility model is to provide a quick-switching and limiting fixing device for pipe fitting packaging boxes of different sizes, which has the characteristics of simple structure, simple operation and low dependence on the environment.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A quick-change limiting and fixing device for pipe fitting packaging boxes of different sizes includes a roller conveyor. The roller conveyor has symmetrically arranged front and rear guide limiting plates on its front and rear sides. Two connecting plates are symmetrically arranged outwards on each of the two guide limiting plates. Each connecting plate has an oblong hole. A handle is provided at the interface between the roller conveyor and the connecting plate. The connecting plate is fixed to the roller conveyor by passing the handle through the oblong hole. Limiting and fixing mechanisms are provided on the front and rear sides of the roller conveyor for limiting the four corners of the production pipe fitting packaging box located at the center of the roller conveyor in the front-rear direction. A large and small box switching mechanism is provided at the front and rear of the overall frame of the roller conveyor.

[0006] Furthermore, the limiting and fixing mechanism includes a left front limiting and fixing plate, a left front limiting and fixing cylinder, a right front limiting and fixing cylinder, a right front limiting and fixing plate fixedly connected, a left rear limiting and fixing plate, a left rear limiting and fixing cylinder, a right rear limiting and fixing plate, and a right rear limiting and fixing cylinder. A front limiting and fixing mechanism overall mounting plate is fixedly provided on the front side of the roller conveyor. Two front extension slide rails are symmetrically fixed on the front limiting and fixing mechanism overall mounting plate. Several... A slider is used, and the right front-side advance cylinder fixing bracket is sleeved on the front extension slide rail via the slider. Two right front-side advance slide rails are symmetrically fixed on the right front-side advance cylinder fixing bracket. The right front-side limiting fixing cylinder is fixedly connected to the right front-side limiting fixing cylinder mounting plate. Several sliders are installed on the right front-side limiting fixing cylinder mounting plate. The right front-side limiting fixing cylinder mounting plate is sleeved on the right front-side advance slide rail via the slider. The movable block of the right front-side limiting fixing cylinder is fixedly connected to the right front-side limiting fixing plate.

[0007] Furthermore, the movable block of the left front limiting and fixing cylinder is fixedly connected to the left front limiting and fixing plate, the left front limiting and fixing cylinder is fixedly connected to the left front limiting and fixing cylinder mounting plate, the overall mounting plate of the front limiting and fixing mechanism is fixed on the left front advancing cylinder fixing frame, two left front advancing slide rails are symmetrically fixed on the left front advancing cylinder fixing frame, and several sliders are installed on the left front limiting and fixing cylinder mounting plate, which are sleeved on the left front advancing slide rails through the sliders.

[0008] Furthermore, the large and small box switching mechanism includes a right rear advance cylinder fixing bracket; the movable block of the right rear limit fixing cylinder is fixedly connected to the right rear limit fixing plate, the right rear limit fixing cylinder is fixedly connected to the right rear limit fixing cylinder mounting plate, two right rear advance slide rails are symmetrically arranged on the right rear advance cylinder fixing bracket, several sliders are installed on the right rear limit fixing cylinder mounting plate, which is sleeved on the right rear advance slide rails through the sliders, several sliders are installed on the right rear advance cylinder fixing bracket, which is sleeved on the rear extension slide rails through the sliders, the two rear extension slide rails are fixedly connected to the rear limit fixing mechanism overall mounting plate, and the rear limit fixing mechanism overall mounting plate is fixedly connected to the roller conveyor.

[0009] Furthermore, the movable block of the left rear limit fixing cylinder is fixedly connected to the left rear limit fixing plate, the left rear limit fixing cylinder is fixedly connected to the left rear limit fixing cylinder mounting plate, a number of sliders are installed on the left rear limit fixing cylinder mounting plate, and the sliders are sleeved on the left rear advance slide rail. The two left rear advance slide rails are fixedly connected to the left rear advance cylinder fixing frame. The left rear advance cylinder fixing frame is fixedly connected to the rear limit fixing mechanism overall mounting plate, and the rear limit fixing mechanism overall mounting plate is fixedly connected to the roller conveyor.

[0010] Furthermore, the large and small box switching mechanism also includes a left front large and small box switching advance cylinder, a left front limit fixing cylinder mounting plate, a right front large and small box switching advance cylinder, a right front limit fixing cylinder mounting plate, a left rear large and small box switching advance cylinder, a left rear limit fixing cylinder mounting plate, a right rear large and small box switching advance cylinder, a right rear limit fixing cylinder mounting plate, a front large and small box switching extension cylinder, a right front advance cylinder fixing frame, and a rear large and small box switching extension cylinder. The left front large and small box switching advance cylinder is fixedly connected to the left front advance cylinder fixing frame. The movable rod of the left front large and small box switching advance cylinder is threadedly connected to a large and small box switching advance connector. The left front limit fixing cylinder mounting plate is fixedly installed on the large and small box switching advance connector frame. One end of the large and small box switching advance connector is located inside the large and small box switching advance connector frame, and there is a gap between the large and small box switching advance connector and the large and small box switching advance connector frame.

[0011] Furthermore, the right front side large and small box switching advance cylinder is fixedly connected to the right front side advance cylinder fixing bracket, the right front side large and small box switching advance cylinder movable rod is threadedly connected to the large and small box switching advance connector, the right front side limit fixing cylinder mounting plate is fixedly installed on the large and small box switching advance connector, one end of the large and small box switching advance connector is located inside the large and small box switching advance connector, and there is a gap between the large and small box switching advance connector and the large and small box switching advance connector.

[0012] Furthermore, the left rear side large and small box switching advance cylinder is fixedly connected to the left rear side advance cylinder fixing bracket, the left rear side limit fixing cylinder mounting plate is fixedly connected to the large and small box switching advance connecting bracket, the large and small box switching advance connecting bracket is threadedly connected to the movable rod of the left rear side large and small box switching advance cylinder, the large and small box switching advance connecting bracket is provided with a large and small box switching advance connecting head, and there is a gap between the large and small box switching advance connecting head and the large and small box switching advance connecting bracket;

[0013] The right rear side large and small box switching advance cylinder is fixedly connected to the right rear side advance cylinder fixing bracket. The right rear side limit fixing cylinder mounting plate is fixedly connected to the large and small box switching advance connecting bracket. The large and small box switching advance connecting bracket is threadedly connected to the movable rod of the right rear side large and small box switching advance cylinder. The large and small box switching advance connecting bracket is provided with a large and small box switching advance connecting head, and there is a gap between the large and small box switching advance connecting head and the large and small box switching advance connecting bracket.

[0014] Furthermore, the front-side large and small box switching expansion cylinder is fixedly connected to the front-side limiting and fixing mechanism overall mounting plate, and the movable rod of the front-side large and small box switching expansion cylinder is threadedly connected to the front-side expansion fisheye rod end joint bearing. The end of the front-side expansion fisheye rod end joint bearing is sleeved on the right front-side advance cylinder fixing frame and is limited by a snap ring.

[0015] The rear-side large and small box switching expansion cylinder is fixedly connected to the rear-side limiting and fixing mechanism overall mounting plate. The movable rod of the rear-side large and small box switching expansion cylinder is threadedly connected to the rear-side expansion fisheye rod end joint bearing. The rear-side expansion fisheye rod end joint bearing is sleeved on the right rear-side advance cylinder fixing frame and is limited by a snap ring.

[0016] Furthermore, a position sensing photoelectric sensor mounting bracket is fixedly installed on the roller conveyor, and a position sensing diffuse reflection photoelectric sensor is fixedly installed on the position sensing photoelectric sensor mounting bracket. A position sensing photoelectric sensor reflector is installed directly behind the position sensing diffuse reflection photoelectric sensor, and the position sensing photoelectric sensor reflector is fixedly connected to the roller conveyor; polytetrafluoroethylene plates are respectively provided on the inner surfaces of the front guide limiting plate and the rear guide limiting plate.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1) In this utility model, each guide limiting plate is symmetrically provided with two connecting plates facing outward, and each connecting plate is provided with a waist-shaped hole, so as to be compatible with packaging boxes of pipe fittings of different specifications;

[0019] 2) The rollers of this utility model roller conveyor are rubber-coated rollers, which can ensure sufficient friction between the rollers and the pipe fitting packaging boxes, prevent slippage when conveying the pipe fitting packaging boxes, and improve the stability of the conveying.

[0020] 3) There is a certain gap between the large and small box switching advance connector and the large and small box switching advance connector frame in the up, down, left, right and front and back directions of this utility model, so as to prevent the large and small box switching advance cylinder from getting stuck when it moves back and forth, and improve the stability of the large and small box advance switching.

[0021] 4) This utility model has a novel design and reasonable concept. It mainly has the function of conveying and limiting the fixed size of the pipe fitting packaging boxes and has the function of quickly switching between large and small boxes. At the same time, it has a simple structure, saves costs, has minimal dependence on the environment, and is easy to operate. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0023] Figure 2 This is a top view of the limiting and fixing mechanism of the present invention.

[0024] Figure 3 This is a front view of the limiting and fixing mechanism of the device of this utility model;

[0025] Figure 4 This is a rear view of the limiting and fixing mechanism of the device of this utility model;

[0026] Figure 5 This is a left view of the limiting and fixing mechanism of the device of this utility model;

[0027] Figure 6 This is a detailed drawing of the connecting component of the cylinder for switching between large and small boxes in this utility model device.

[0028] In the diagram: 1. Right rear limit fixing cylinder; 2. Left rear limit fixing cylinder; 3. Left rear limit fixing plate; 4. Left front limit fixing plate; 5. Left front limit fixing cylinder; 6. Right front limit fixing cylinder; 7. Front guide limit plate; 8. Right front limit fixing plate; 9. Pipe fitting packaging box; 10. Roller conveyor; 11. Pipe fitting packaging box; 12. Right rear box switching advance cylinder; 13. Left rear box switching advance cylinder; 14. Overall installation of the rear limit fixing mechanism. 15. Front limit fixing mechanism mounting plate; 16. Left front large / small box switching advance cylinder; 17. Right front large / small box switching advance cylinder; 18. Rear guide limit plate; 19. Right rear limit fixing plate; 20. Left front limit fixing cylinder mounting plate; 21. Left front advance slide rail; 22. Left front advance cylinder fixing bracket; 23. Front large / small box switching expansion cylinder; 24. Front expansion slide rail; 25. 26. Front extended spherical rod end joint bearing; 27. Right front advance cylinder mounting bracket; 28. Right front advance slide rail; 29. ​​Right front limit fixing cylinder mounting plate; 30. Right rear limit fixing cylinder mounting plate; 31. Right rear advance slide rail; 32. Rear extended spherical rod end joint bearing; 33. Rear extended slide rail; 34. Rear large / small box switching extended cylinder; 35. Left rear advance cylinder mounting bracket; 36. Left rear advance slide rail; 37. Left rear limit fixing cylinder mounting plate; 38. Position sensing photoelectric sensor reflector plate; 39. Position sensing photoelectric sensor mounting bracket; 40. Position sensing diffuse reflection photoelectric sensor; 41. Large / small box switching advance connecting bracket; 42. Large / small box switching advance cylinder; 43. Large / small box switching advance connector; 44. Connecting plate; 45. Waist-shaped hole; 46. Handle. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the scope described herein.

[0030] Please refer to Figure 1 A quick-change limiting and fixing device for pipe fitting packaging boxes of different sizes includes a roller conveyor 10, which is assembled from an overall frame, a conveyor motor, rubber-coated rollers, chains, sprockets, etc. The roller conveyor 10 has symmetrically arranged front guide limiting plates 7 and rear guide limiting plates 18 on its front and rear sides. Both front and rear guide limiting plates are made of thickened stainless steel plates cut, welded, and perforated. A polytetrafluoroethylene (PTFE) plate is installed on the inner surface of each front and rear guide limiting plate, which has good self-lubricating properties, reducing friction between the plate and the pipe fitting packaging box and improving the stability of the guiding and limiting function.

[0031] Two guide limiting plates are symmetrically provided with two connecting plates 44 facing outwards. Each connecting plate 44 has an oblong hole 45. The joint between the roller conveyor 10 and the connecting plate 44 is provided with a handle 46. The connecting plate 44 is fixed to the roller conveyor 10 by passing the handle 46 through the oblong hole 45. When the fixed handle 46 is released, the front and rear guide limiting plates can be adjusted in front and back position through the oblong hole 45, so as to be compatible with different sizes of pipe fitting packaging boxes.

[0032] The roller conveyor 10 is equipped with limiting and fixing mechanisms on both the front and rear sides for limiting the four corners of the production pipe packaging box located at the center of the front and rear directions of the roller conveyor 10. The overall frame of the roller conveyor 10 is equipped with a large and small box switching mechanism at the front and rear.

[0033] Please refer to Figure 1-4 The limiting and fixing mechanism includes a left front limiting and fixing plate 4, a left front limiting and fixing cylinder 5, a right front limiting and fixing cylinder 6, a right front limiting and fixing plate 8 for fixed connection, a left rear limiting and fixing plate 3, a left rear limiting and fixing cylinder 2, a right rear limiting and fixing plate 19, and a right rear limiting and fixing cylinder 1.

[0034] The front side of the roller conveyor 10 is fixedly provided with a front limiting and fixing mechanism overall mounting plate 15. The front limiting and fixing mechanism overall mounting plate 15 is made of thickened steel plate cut and punched. Two front extension slide rails 24 are symmetrically fixed on the front limiting and fixing mechanism overall mounting plate 15. Several sliders are installed on the right front advance cylinder fixing bracket 26. In this embodiment, there are 4 sliders. The right front advance cylinder fixing bracket 26 is sleeved on the front extension slide rail 24 through the sliders. With the help of the sliders and the front extension slide rail 24, the right front advance cylinder fixing bracket 26 can move freely left and right.

[0035] Two right front advance slide rails 27 are symmetrically fixed on the right front advance cylinder fixing bracket 26. The right front limit fixing cylinder 6 is fixedly connected to the right front limit fixing cylinder mounting plate 28. Several sliders are installed on the right front limit fixing cylinder mounting plate 28. In this embodiment, there are 4 sliders. The right front limit fixing cylinder mounting plate 28 is sleeved on the right front advance slide rail 27 through the sliders. With the help of the sliders and the right front advance slide rail 27, the right front limit fixing cylinder mounting plate 28 can move freely back and forth.

[0036] The movable block of the right front limit fixing cylinder 6 is fixedly connected to the right front limit fixing plate 8.

[0037] In this embodiment, the right front-side advance cylinder fixing bracket 26 is made of thickened steel plate and steel bar by cutting, welding and drilling; the right front-side advance cylinder fixing bracket 26 is made of thickened steel plate and steel bar by cutting, welding and drilling; the right front-side limiting fixing plate 8 is made of stainless steel plate by cutting, bending, welding and drilling.

[0038] The movable block of the left front limiting and fixing cylinder 5 is fixedly connected to the left front limiting and fixing plate 4. The left front limiting and fixing cylinder 5 is fixedly connected to the left front limiting and fixing cylinder mounting plate 20. The front limiting and fixing mechanism overall mounting plate 15 is fixed on the left front advancing cylinder fixing bracket 22. Two left front advancing slide rails 21 are symmetrically fixed on the left front advancing cylinder fixing bracket 22. Several sliders are installed on the left front limiting and fixing cylinder mounting plate 20. The sliders are sleeved on the left front advancing slide rails 21. Similarly, with the help of the sliders and the left front advancing slide rails 21, the left front limiting and fixing cylinder mounting plate 20 can move freely back and forth.

[0039] In this embodiment, the left front limiting fixing plate 4 is made of stainless steel plate by cutting, bending, welding and punching; the left front advancing cylinder fixing bracket 22 is made of thickened steel plate by cutting, welding and punching.

[0040] The movable block of the right rear limit fixing cylinder 1 is fixedly connected to the right rear limit fixing plate 19. The right rear limit fixing cylinder 1 is fixedly connected to the right rear limit fixing cylinder mounting plate 29. Two right rear advance slide rails 30 are symmetrically arranged on the right rear advance cylinder fixing bracket 31. Several sliders are installed on the right rear limit fixing cylinder mounting plate 29. The sliders are sleeved on the right rear advance slide rails 30. With the help of the sliders and the right rear advance slide rails 30, the right rear limit fixing cylinder mounting plate 29 can move freely back and forth.

[0041] Several sliders are installed on the right rear advance cylinder fixing bracket 31. The sliders are fitted onto the rear extension slide rail 33. The two rear extension slide rails 33 are fixedly connected to the rear limit fixing mechanism overall mounting plate 14. With the help of the sliders and the rear extension slide rails 33, the right rear advance cylinder fixing bracket 31 can move freely left and right. The rear limit fixing mechanism overall mounting plate 14 is fixedly connected to the roller conveyor 10.

[0042] The right rear limit fixing plate 19 is made of stainless steel plate by cutting, bending, welding and punching. The right rear advance cylinder fixing bracket 31 is made of thickened steel plate and steel bar by cutting, welding and punching.

[0043] The movable block of the left rear limit fixing cylinder 2 is fixedly connected to the left rear limit fixing plate 3. The left rear limit fixing cylinder 2 is fixedly connected to the left rear limit fixing cylinder mounting plate 37. Several sliders are installed on the left rear limit fixing cylinder mounting plate 37, and the sliders are sleeved on the left rear advance slide rail 36. With the help of the sliders and the left rear advance slide rail 36, the left rear limit fixing cylinder mounting plate 37 can move freely back and forth. Both left rear advance slide rails 36 are fixedly connected to the left rear advance cylinder fixing frame 35. The left rear advance cylinder fixing frame 35 is fixedly connected to the rear limit fixing mechanism overall mounting plate 14. The rear limit fixing mechanism overall mounting plate 14 is fixedly connected to the roller conveyor 10.

[0044] The left rear limit fixing plate 3 is made of stainless steel plate by cutting, bending, welding and drilling; the rear limit fixing mechanism overall mounting plate 14 is made of thickened steel plate by cutting and drilling; the left rear advance cylinder fixing bracket 35 is made of thickened steel plate by cutting, welding and drilling.

[0045] The large and small box switching mechanism includes a left front large and small box switching advance cylinder 16, a left front limit fixing cylinder mounting plate 20, a right front large and small box switching advance cylinder 17, a right front limit fixing cylinder mounting plate 28, a left rear large and small box switching advance cylinder 13, a left rear limit fixing cylinder mounting plate 37, a right rear large and small box switching advance cylinder 12, a right rear limit fixing cylinder mounting plate 29, a front large and small box switching extension cylinder 23, a right front advance cylinder fixing bracket 26, a rear large and small box switching extension cylinder 34, and a right rear advance cylinder fixing bracket 31.

[0046] The left front side large and small box switching advance cylinder 16 is fixedly connected to the left front side advance cylinder fixing bracket 22. The movable rod of the left front side large and small box switching advance cylinder 16 is threadedly connected to the large and small box switching advance connector 43. The left front side limit fixing cylinder mounting plate 20 is fixedly installed on the large and small box switching advance connector 41. One end of the large and small box switching advance connector 43 is located inside the large and small box switching advance connector 41, and there is a gap between the large and small box switching advance connector 43 and the large and small box switching advance connector 41 to prevent the movable rod of the left front side large and small box switching advance cylinder 16 from getting stuck when it moves back and forth.

[0047] The left front-side advance cylinder mounting bracket 22 is made of thickened steel plate by cutting, welding and drilling.

[0048] The right front side large and small box switching advance cylinder 17 is fixedly connected to the right front side advance cylinder fixing bracket 26. The movable rod of the right front side large and small box switching advance cylinder 17 is threadedly connected to the large and small box switching advance connector 43. The right front side limit fixing cylinder mounting plate 28 is fixedly installed on the large and small box switching advance connector 41. One end of the large and small box switching advance connector 43 is located inside the large and small box switching advance connector 41, and there is a gap between the large and small box switching advance connector 43 and the large and small box switching advance connector 41 to prevent the movable rod of the right front side large and small box switching advance cylinder 17 from getting stuck when it moves back and forth.

[0049] The right front-side advance cylinder mounting bracket 26 is made of thickened steel plate and steel bar cut, welded and punched.

[0050] The left rear side large and small box switching advance cylinder 13 is fixedly connected to the left rear side advance cylinder fixing bracket 35. The left rear side limit fixing cylinder mounting plate 37 is fixedly connected to the large and small box switching advance connecting bracket 41. The large and small box switching advance connecting bracket 41 is threadedly connected to the movable rod of the left rear side large and small box switching advance cylinder 13. The large and small box switching advance connecting bracket 41 is provided with a large and small box switching advance connector 43, and there is a gap between the large and small box switching advance connector 43 and the large and small box switching advance connecting bracket 41 to prevent the movable rod of the left rear side large and small box switching advance cylinder 13 from getting stuck when it moves back and forth.

[0051] The left rear-side advance cylinder mounting bracket 35 is made of thickened steel plate by cutting, welding and drilling.

[0052] Please refer to Figure 6 The right rear side large and small box switching advance cylinder 12 is fixedly connected to the right rear side advance cylinder fixing bracket 31. The right rear side limit fixing cylinder mounting plate 29 is fixedly connected to the large and small box switching advance connecting bracket 41. The large and small box switching advance connecting bracket 41 is threadedly connected to the movable rod of the right rear side large and small box switching advance cylinder 12. The large and small box switching advance connecting bracket 41 is provided with a large and small box switching advance connecting head 43, and there is a gap between the large and small box switching advance connecting head 43 and the large and small box switching advance connecting bracket 41.

[0053] The right rear-side advance cylinder mounting bracket 31 is made of thickened steel plate and steel bar cut, welded and punched.

[0054] The front large and small box switching expansion cylinder 23 is fixedly connected to the front limit fixing mechanism overall mounting plate 15. The movable rod of the front large and small box switching expansion cylinder 23 is threadedly connected to the front expansion fisheye rod end joint bearing 25. The end of the front expansion fisheye rod end joint bearing 25 is sleeved on the right front advance cylinder fixing bracket 26 and is limited by a snap ring.

[0055] The rear-side large and small box switching expansion cylinder 34 is fixedly connected to the rear-side limiting and fixing mechanism overall mounting plate 14. The movable rod of the rear-side large and small box switching expansion cylinder 34 is threadedly connected to the rear-side expansion fisheye rod end joint bearing 32. The rear-side expansion fisheye rod end joint bearing 32 is sleeved on the right rear-side advance cylinder fixing bracket 31 and is limited by a snap ring.

[0056] Please refer to Figure 5A position-sensing photoelectric sensor mounting bracket 39 is fixedly installed on the roller conveyor 10. A position-sensing diffuse reflection photoelectric sensor 40 is fixedly installed on the mounting bracket 39. A position-sensing photoelectric sensor reflector 38 is installed directly behind the position-sensing diffuse reflection photoelectric sensor 40 and is fixedly connected to the roller conveyor 10. The position-sensing diffuse reflection photoelectric sensor 40 and the position-sensing photoelectric sensor reflector 38 are used together to sense the position of the pipe fitting packaging box and send the sensing signal to the control system to control the operation of the roller conveyor, thereby achieving the purpose of controlling the stopping position of the pipe fitting packaging box.

[0057] The specific implementation process of the utility model device in the production process is as follows:

[0058] When producing the small packaging box 11 for pipe fittings, first loosen the fixing handles on the front guide limit plate 7 and the rear guide limit plate 18, adjust the position of the front and rear guide limit plates, and then lock the fixing handles to ensure that the small packaging box 11 for pipe fittings is located at the center of the roller conveyor 10 in the front-back direction, and that the front large and small box switching expansion cylinder 23 and the rear large and small box switching expansion cylinder 34 are both in the retracted state, and the left front large and small box switching advance cylinder 16, the right front large and small box switching advance cylinder 17, the left rear large and small box switching advance cylinder 13, and the right rear large and small box switching advance cylinder 12 are also in the retracted state; then start the device. After the bagged pipe fittings in the previous stage are packed into boxes, the small packaging box 11 for pipe fittings is formed and enters the roller conveyor 10 from the right and is conveyed to the left. When the position sensing diffuse reflection photoelectric sensor 40 senses the small packaging box 11 for pipe fittings, the roller conveyor 10 stops running. Then, the left front limiting and fixing cylinder 5 moves the left front limiting and fixing plate 4 backward, the right front limiting and fixing cylinder 6 moves the right front limiting and fixing plate 8 backward, the left rear limiting and fixing cylinder 2 moves the left rear limiting and fixing plate 3 forward, and the right rear limiting and fixing cylinder 1 moves the right rear limiting and fixing plate 19 forward. At this time, the pipe fitting packaging box 11 is firmly fixed by the limiting and fixing plates at the four corners. Next, the leveling mechanism levels the bagged pipe fittings inside the pipe fitting packaging box 11. After leveling, the left front limiting and fixing cylinder 5 moves the left front limiting and fixing plate 4 back to its original position, the right front limiting and fixing cylinder 6 moves the right front limiting and fixing plate 8 back to its original position, the left rear limiting and fixing cylinder 2 moves the left rear limiting and fixing plate 3 back to its original position, and the right rear limiting and fixing cylinder 1 moves the right rear limiting and fixing plate 19 back to its original position. Then the roller conveyor 10 resumes operation, driving the pipe fitting packaging box 11 to continue to the left to enter the next sealing stage, and then the device waits for the arrival of the next pipe fitting packaging box.

[0059] When producing the large packaging box 9 for pipe fittings, first loosen the fixing handles on the front guide limit plate 7 and the rear guide limit plate 18, adjust the positions of the front guide limit plate 7 and the rear guide limit plate 18, and then tighten the fixing handles to ensure that the large packaging box 9 for pipe fittings is centered in the front-to-back direction of the roller conveyor 10. Then, switch the packaging mode to the large box mode on the system. At this time, the front large-to-small box switching extension cylinder 23 extends and drives the right front advance cylinder fixing frame 26 and the mechanism above it to move to the right. At the same time, the rear large-to-small box switching extension cylinder 34 drives the right rear advance cylinder fixing frame 31 and the mechanism above it to move to the right. Then, the left front-side large / small box switching advance cylinder 16 drives the left front-side limit fixing cylinder mounting plate 20 and the mechanism above it to move backward; the right front-side large / small box switching advance cylinder 17 drives the right front-side limit fixing cylinder mounting plate 28 and the mechanism above it to move backward; the left rear-side large / small box switching advance cylinder 13 drives the left rear-side limit fixing cylinder mounting plate 37 and the mechanism above it to move forward; and the right rear-side large / small box switching advance cylinder 12 drives the right rear-side limit fixing cylinder mounting plate 29 and the mechanism above it to move forward. At this time, the large box mode switching is completed, and then the device is started. After the previous stage of bagged pipe fittings is packed, a large pipe fitting packaging box 9 is formed and enters the roller conveyor 10 from the right side and is conveyed to the left. When the position sensing diffuse reflection photoelectric sensor 40 senses the large pipe fitting packaging box 9, the roller conveyor 10 stops running. Then, the left front limiting and fixing cylinder 5 moves the left front limiting and fixing plate 4 backward, the right front limiting and fixing cylinder 6 moves the right front limiting and fixing plate 8 backward, the left rear limiting and fixing cylinder 2 moves the left rear limiting and fixing plate 3 forward, and the right rear limiting and fixing cylinder 1 moves the right rear limiting and fixing plate 19 forward. At this time, the large packaging box 9 for pipe fittings is firmly fixed by the limiting and fixing plates at the four corners. Next, the leveling mechanism levels the bagged pipe fittings inside the large packaging box 9. After leveling, the left front limiting and fixing cylinder 5 moves the left front limiting and fixing plate 4 back to its original position, the right front limiting and fixing cylinder 6 moves the right front limiting and fixing plate 8 back to its original position, the left rear limiting and fixing cylinder 2 moves the left rear limiting and fixing plate 3 back to its original position, and the right rear limiting and fixing cylinder 1 moves the right rear limiting and fixing plate 19 back to its original position. Then, the roller conveyor 10 resumes operation, driving the large packaging box 9 of pipe fittings to continue conveying to the left into the next sealing stage. The device then waits for the arrival of the next large packaging box of pipe fittings. The device operation is complete.

Claims

1. A quick-switching and limiting device for pipe fitting packaging boxes of different sizes, comprising a roller conveyor (10), wherein a front guide limiting plate (7) and a rear guide limiting plate (18) are symmetrically arranged on the front and rear sides of the roller conveyor (10), and two connecting plates (44) are symmetrically arranged outward on both guide limiting plates, each connecting plate (44) having an oblong hole (45), and a handle (46) is provided at the mating point between the roller conveyor (10) and the connecting plate (44), wherein the connecting plate (44) is fixed to the roller conveyor (10) by the handle (46) passing through the oblong hole (45), characterized in that The roller conveyor (10) is provided with limiting and fixing mechanisms on the front and rear sides for limiting the four corners of the production pipe packaging box located at the center of the front and rear direction of the roller conveyor (10). The overall frame of the roller conveyor (10) is provided with a large and small box switching mechanism at the front and rear.

2. The quick-switching and limiting fixing device for pipe fitting packaging boxes of different sizes according to claim 1, characterized in that... The limiting and fixing mechanism includes a left front limiting and fixing plate (4), a left front limiting and fixing cylinder (5), a right front limiting and fixing cylinder (6), a right front limiting and fixing plate (8) fixedly connected, a left rear limiting and fixing plate (3), a left rear limiting and fixing cylinder (2), a right rear limiting and fixing plate (19), and a right rear limiting and fixing cylinder (1). The front side of the roller conveyor (10) is fixedly provided with a front limiting and fixing mechanism overall mounting plate (15). Two front extension slide rails (24) are symmetrically fixed on the front limiting and fixing mechanism overall mounting plate (15). Several right front advance cylinder fixing brackets (26) are installed on the right front advance cylinder fixing bracket. A slider, the right front advance cylinder fixing bracket (26) is sleeved on the front extension slide rail (24) by the slider, two right front advance slide rails (27) are symmetrically fixed on the right front advance cylinder fixing bracket (26), the right front limit fixing cylinder (6) is fixedly connected to the right front limit fixing cylinder mounting plate (28), a number of sliders are installed on the right front limit fixing cylinder mounting plate (28), the right front limit fixing cylinder mounting plate (28) is sleeved on the right front advance slide rail (27) by the slider, and the movable block of the right front limit fixing cylinder (6) is fixedly connected to the right front limit fixing plate (8).

3. The quick-switching and limiting fixing device for pipe fitting packaging boxes of different sizes according to claim 2, characterized in that... The movable block of the left front limiting and fixing cylinder (5) is fixedly connected to the left front limiting and fixing plate (4). The left front limiting and fixing cylinder (5) is fixedly connected to the left front limiting and fixing cylinder mounting plate (20). The front limiting and fixing mechanism overall mounting plate (15) is fixed on the left front advancing cylinder fixing bracket (22). Two left front advancing slide rails (21) are symmetrically fixed on the left front advancing cylinder fixing bracket (22). Several sliders are installed on the left front limiting and fixing cylinder mounting plate (20), which are sleeved on the left front advancing slide rails (21) through the sliders.

4. The quick-switching and limiting fixing device for pipe fitting packaging boxes of different sizes according to claim 3, characterized in that... The large and small box switching mechanism includes a right rear advance cylinder fixing frame (31); the movable block of the right rear limit fixing cylinder (1) is fixedly connected to the right rear limit fixing plate (19); the right rear limit fixing cylinder (1) is fixedly connected to the right rear limit fixing cylinder mounting plate (29); two right rear advance slide rails (30) are symmetrically arranged on the right rear advance cylinder fixing frame (31); several sliders are installed on the right rear limit fixing cylinder mounting plate (29), which are sleeved on the right rear advance slide rail (30) through the sliders; several sliders are installed on the right rear advance cylinder fixing frame (31), which are sleeved on the rear extension slide rail (33) through the sliders; the two rear extension slide rails (33) are fixedly connected to the rear limit fixing mechanism overall mounting plate (14); the rear limit fixing mechanism overall mounting plate (14) is fixedly connected to the roller conveyor (10).

5. The quick-switching and limiting fixing device for pipe fitting packaging boxes of different sizes according to claim 4, characterized in that... The movable block of the left rear side limiting and fixing cylinder (2) is fixedly connected to the left rear side limiting and fixing plate (3). The left rear side limiting and fixing cylinder (2) is fixedly connected to the left rear side limiting and fixing cylinder mounting plate (37). Several sliders are installed on the left rear side limiting and fixing cylinder mounting plate (37), and they are sleeved on the left rear side advancing slide rail (36) through the sliders. The two left rear side advancing slide rails (36) are fixedly connected to the left rear side advancing cylinder fixing frame (35). The left rear side advancing cylinder fixing frame (35) is fixedly connected to the rear limiting and fixing mechanism overall mounting plate (14). The rear limiting and fixing mechanism overall mounting plate (14) is fixedly connected to the roller conveyor (10).

6. The quick-switching and limiting fixing device for pipe fitting packaging boxes of different sizes according to claim 5, characterized in that... The large and small box switching mechanism also includes a left front large and small box switching advance cylinder (16), a left front limit fixing cylinder mounting plate (20), a right front large and small box switching advance cylinder (17), a right front limit fixing cylinder mounting plate (28), a left rear large and small box switching advance cylinder (13), a left rear limit fixing cylinder mounting plate (37), a right rear large and small box switching advance cylinder (12), a right rear limit fixing cylinder mounting plate (29), a front large and small box switching extension cylinder (23), a right front advance cylinder fixing bracket (26), and a rear large and small box switching extension cylinder (34). The left front side large and small box switching advance cylinder (16) is fixedly connected to the left front side advance cylinder fixing bracket (22). The movable rod of the left front side large and small box switching advance cylinder (16) is threadedly connected to the large and small box switching advance connector (43). The left front side limit fixing cylinder mounting plate (20) is fixedly installed on the large and small box switching advance connector (41). One end of the large and small box switching advance connector (43) is located inside the large and small box switching advance connector (41), and there is a gap between the large and small box switching advance connector (43) and the large and small box switching advance connector (41).

7. A quick-switching and limiting fixing device for pipe fitting packaging boxes of different sizes according to claim 6, characterized in that... The right front side large and small box switching advance cylinder (17) is fixedly connected to the right front side advance cylinder fixing bracket (26). The movable rod of the right front side large and small box switching advance cylinder (17) is threadedly connected to the large and small box switching advance connector (43). The right front side limit fixing cylinder mounting plate (28) is fixedly installed on the large and small box switching advance connector (41). One end of the large and small box switching advance connector (43) is located inside the large and small box switching advance connector (41), and there is a gap between the large and small box switching advance connector (43) and the large and small box switching advance connector (41).

8. A quick-switching and limiting fixing device for pipe fitting packaging boxes of different sizes according to claim 7, characterized in that... The left rear side large and small box switching advance cylinder (13) is fixedly connected to the left rear side advance cylinder fixing bracket (35), the left rear side limit fixing cylinder mounting plate (37) is fixedly connected to the large and small box switching advance connecting bracket (41), the large and small box switching advance connecting bracket (41) is threadedly connected to the movable rod of the left rear side large and small box switching advance cylinder (13), the large and small box switching advance connecting bracket (41) is provided with a large and small box switching advance connector (43), and there is a gap between the large and small box switching advance connector (43) and the large and small box switching advance connecting bracket (41); The right rear side large and small box switching advance cylinder (12) is fixedly connected to the right rear side advance cylinder fixing bracket (31). The right rear side limit fixing cylinder mounting plate (29) is fixedly connected to the large and small box switching advance connecting bracket (41). The large and small box switching advance connecting bracket (41) is threadedly connected to the movable rod of the right rear side large and small box switching advance cylinder (12). The large and small box switching advance connecting bracket (41) is provided with a large and small box switching advance connector (43), and there is a gap between the large and small box switching advance connector (43) and the large and small box switching advance connecting bracket (41).

9. A quick-switching and limiting fixing device for pipe fitting packaging boxes of different sizes according to claim 8, characterized in that... The front-side large and small box switching expansion cylinder (23) is fixedly connected to the front-side limiting and fixing mechanism overall mounting plate (15). The movable rod of the front-side large and small box switching expansion cylinder (23) is threadedly connected to the front-side expansion fisheye rod end joint bearing (25). The end of the front-side expansion fisheye rod end joint bearing (25) is sleeved on the right front-side advance cylinder fixing bracket (26) and limited by a snap ring. The rear-side large and small box switching expansion cylinder (34) is fixedly connected to the rear-side limiting and fixing mechanism overall mounting plate (14). The movable rod of the rear-side large and small box switching expansion cylinder (34) is threadedly connected to the rear-side expansion fisheye rod end joint bearing (32). The rear-side expansion fisheye rod end joint bearing (32) is sleeved on the right rear-side advance cylinder fixing bracket (31) and limited by a snap ring.

10. A quick-switching and limiting fixing device for pipe fitting packaging boxes of different sizes according to claim 1, characterized in that... The roller conveyor (10) is fixedly provided with a position sensing photoelectric sensor mounting bracket (39), and a position sensing diffuse reflection photoelectric sensor (40) is fixedly provided on the position sensing photoelectric sensor mounting bracket (39). A position sensing photoelectric sensor reflector plate (38) is installed directly behind the position sensing diffuse reflection photoelectric sensor (40), and the position sensing photoelectric sensor reflector plate (38) is fixedly connected to the roller conveyor (10). Polytetrafluoroethylene plates are respectively provided on the inner surfaces of the front guide limiting plate (7) and the rear guide limiting plate (18).

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