Guide roller set

Abstract

The utility model discloses a guide roller set which is arranged on a bag delivery machine and used for guiding and pulling a material bag belt and comprises a driving mechanism, a guide rail, a movable seat, a plurality of fixed traction wheels and a plurality of movable traction wheels, and the fixed traction wheels and the movable traction wheels are arranged on a rack and the movable seat at intervals in a one-to-one correspondence mode. The movable seat is rotatably installed on the rack, and an adjusting piece used for controlling the movable seat to rotate is arranged on the rack. According to the utility model, the plurality of movable traction wheels on the movable seat can be driven by the adjusting piece to be separated from the material bag belt, so that a worker can conveniently take out the material bag belt from the guide rail to dredge the guide rail, the operation is simple, and the maintenance efficiency of the bag delivery machine is improved; according to the utility model, the hand of a worker can be effectively prevented from being pulled when the material bag belt is subjected to traction force of the fixed traction wheel and the movable traction wheel, the potential safety hazard that the hand of the worker is pinched by the fixed traction wheel and the movable traction wheel is completely eradicated, and the use safety of the bag delivery machine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging machinery, in particular to a guiding roller set. Background Art

[0002] A bag-feeding machine is an automated device widely used in the food, pharmaceutical, and daily necessities industries. Its main function is to cut the strip-connected packaging bags and accurately place the cut single packaging bags onto the designated bag-feeding target objects, such as the seasoning packets in instant noodles, the desiccant or preservative bags in medicine or food bags, etc.

[0003] The applicant disclosed a high-speed bag-feeding machine in the patent with the publication number CN109733697A, which includes a frame. On the frame, there are sequentially arranged an intermediate pool for the packet tape, a conveying roller assembly, a tension control assembly, a traction assembly, a cutting knife assembly, and a bag-transporting assembly. A target object conveyor belt is arranged at the lower part of the frame. The frame also includes a bag-transporting channel, which is inclined from high to low along the conveying direction of the target object conveyor belt. The traction assembly, the cutting knife assembly, and the bag-transporting assembly are sequentially arranged on the bag-transporting channel from high to low. The cutting knife assembly includes a rotary cutting frame installed on the frame. On the rotary cutting frame, there are two mutually adapted active rotary cutter rollers and driven rotary cutter rollers installed through bearings. The active rotary cutter rollers and the driven rotary cutter rollers are driven and connected to a same cutter driving motor to move towards each other. At least one cutting knife is installed on both the active rotary cutter rollers and the driven rotary cutter rollers. The bag-feeding is fast and accurate, the packet tapes are neatly placed onto the bag-feeding target objects, with high efficiency. At the same time, the cutting knives are convenient to replace and the failure rate is low.

[0004] As can be seen from the above patent, although this high-speed bag-feeding machine has the advantages of more accurate bag-feeding, high bag-feeding efficiency, and reduction of the labor intensity and labor cost of workers, in the actual use process, since the metal traction wheel and the rubber traction wheel in the traction assembly are both in a fixed state after installation, and the metal traction wheel and the rubber traction wheel are respectively in tight contact with the upper and lower side surfaces of the packet tape, when the packet tape gets stuck or blocked in the bag-transporting channel, it is not convenient for the staff to take out the packet tape to dredge the bag-transporting channel, the operation is difficult, and the maintenance efficiency of the bag-feeding machine is reduced. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a guiding roller set, aiming to solve the problem that in the existing bag-feeding machine, it is not convenient to take out the packet tape to dredge the bag-transporting channel when the packet tape gets stuck or blocked, the operation is difficult, and the maintenance efficiency of the bag-feeding machine is reduced.

[0006] To achieve the above object, the present utility model provides a guiding roller set, which is arranged on a bag throwing machine and used for guiding and pulling a bag belt. The bag throwing machine includes a frame and a cutter assembly arranged on the frame for cutting the bag belt, and includes a driving mechanism, a guiding rail, a movable seat, a plurality of fixed traction wheels and a movable traction wheel. The plurality of fixed traction wheels and the movable traction wheel are respectively arranged on the frame and the movable seat at intervals in one-to-one correspondence. The movable seat is rotatably installed on the frame, and an adjusting member for controlling the rotation of the movable seat is arranged on the frame; the driving mechanism is used to drive the plurality of fixed traction wheels and the movable traction wheel to rotate towards each other. The guiding rail is detachably installed on the frame and used for guiding the bag belt, and through holes are formed in the guiding rail at positions corresponding to the fixed traction wheels or the movable traction wheel.

[0007] Preferably, the adjusting member is detachably installed on the frame through a connecting frame. The adjusting member is any one of a handle, an electric push rod, a cylinder or a hydraulic cylinder. The power output end of the adjusting member is detachably connected to the movable seat.

[0008] Preferably, the driving mechanism includes a driving member, a transmission assembly, a plurality of first rotating shafts and a plurality of second rotating shafts. The driving member is detachably installed on the frame through a bracket. The plurality of first rotating shafts and the plurality of second rotating shafts are respectively rotatably arranged on the frame and the movable seat at intervals. The transmission assembly is used to transmit the output power of the driving member and drive the plurality of first rotating shafts and the plurality of second rotating shafts to rotate synchronously. The fixed traction wheels and the movable traction wheels are respectively detachably installed on the plurality of first rotating shafts and the plurality of second rotating shafts.

[0009] Preferably, the transmission assembly includes a driving gear and a driven gear that mesh with each other. A driving gear is detachably installed on each of the plurality of first rotating shafts, and a driven gear is detachably installed at a position corresponding to the driving gear on each of the plurality of second rotating shafts.

[0010] Preferably, both the fixed traction wheel and the driving gear can be limitedly moved along the extending direction of the first rotating shaft, and both the movable traction wheel and the driven gear can be limitedly moved along the extending direction of the second rotating shaft.

[0011] Preferably, the transmission assembly further includes a transmission belt, a tensioning wheel and a plurality of belt wheels. The power output end of the driving member is detachably connected to a first rotating shaft, and the belt wheels are arranged on each of the plurality of first rotating shafts. The transmission belt is wound around the plurality of belt wheels. The tensioning wheel is detachably installed on the frame and abuts against the transmission belt.

[0012] Preferably, the fixed traction wheel is made of rubber, the movable traction wheel is made of metal, and anti-slip lines are formed on the outer wall of the movable traction wheel along its circumferential direction.

[0013] Beneficial effects:

[0014] 1. In a guide roller group of the utility model, a plurality of movable traction wheels on a movable seat can be driven to disengage from the contact with the material bag belt through an adjusting member, thereby facilitating the staff to take out the material bag belt from the guide rail to clear the guide rail, which is simple to operate and improves the maintenance efficiency of the bag delivery machine.

[0015] 2. When the guide roller group of the utility model clamps the material bag belt, the staff only needs to lay the material bag belt flat and operate the adjustment piece, thereby effectively preventing the material bag belt from pulling the staff's hands when being pulled by the traction force of the fixed traction wheel and the movable traction wheel, eliminating the safety hazard of the staff's hands being clamped by the fixed traction wheel and the movable traction wheel, and improving the safety of the bag dropping machine.

[0016] 3. During use, the guide roller group of the utility model enables the fixed traction wheel and the movable traction wheel to roll and pull the material bag belt through the driving mechanism, thereby realizing automatic and continuous transportation of the material bag belt and uniform feeding of the cutter assembly, meeting the requirements of the bag delivery machine for efficient and rapid cutting and delivery of the material bag belt, and being reliable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 This is a schematic diagram of the installation of a guide roller group on a bag throwing machine according to an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the installation of a guide roller group on a frame in one embodiment of the utility model;

[0020] Figure 3 This is a schematic structural diagram of a guide roller group in a first viewing angle according to an embodiment of the utility model;

[0021] Figure 4 This is a schematic structural diagram of a guide roller group in a second viewing angle according to an embodiment of the utility model;

[0022] Figure 5 It is a structural schematic diagram of a guide roller group in one embodiment of the utility model at a third viewing angle.

[0023] In the figure: 100 - bag - throwing machine; 200 - a set of guiding rollers; 1 - frame; 2 - driving mechanism; 3 - guiding rail; 4 - movable seat; 5 - fixed traction wheel; 6 - movable traction wheel; 7 - adjusting part; 8 - driving part; 9 - first rotating shaft; 10 - second rotating shaft; 11 - driving gear; 12 - driven gear; 13 - transmission belt; 14 - tensioning wheel; 15 - belt pulley. Detailed implementation manners

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. The components of the embodiments of the present application described and illustrated herein generally can be arranged and designed in a variety of different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0026] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0027] In the description of the present application, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the product of this application is usually placed during use. It is 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 a limitation to the present application. In addition, in the description of the present application, if terms such as "first", "second", etc. are used only for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0028] In addition, in the description of the present application, if terms such as "horizontal" and "vertical" are used, it does not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0029] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", and "coupled" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0030] Embodiment 1:

[0031] The present utility model provides a guiding roller set.

[0032] In an embodiment of the present utility model, a guiding roller set 200 is arranged on a bag-feeding machine 100 and is used for guiding and pulling a bag material belt. The bag-feeding machine 100 includes a frame 1 and a cutter assembly arranged on the frame 1 for cutting the bag material belt, and includes a driving mechanism 2, a guiding rail 3, a movable seat 4, a plurality of fixed traction wheels 5 and a movable traction wheel 6. The plurality of fixed traction wheels 5 and the movable traction wheel 6 are respectively and correspondingly arranged at intervals on the frame 1 and the movable seat 4. The movable seat 4 is rotatably installed on the frame 1, and an adjusting member 7 for controlling the rotation of the movable seat 4 is arranged on the frame 1; the driving mechanism 2 is used for driving the plurality of fixed traction wheels 5 and the movable traction wheel 6 to rotate towards each other. The guiding rail 3 is detachably installed on the frame 1 and is used for guiding the bag material belt, and through holes are formed in the guiding rail 3 at positions corresponding to the fixed traction wheels 5 or the movable traction wheel 6.

[0033] Specifically, as Figures 1 to 5 shown, by arranging a guiding roller set 200 of the present utility model on the bag-feeding machine 100, the bag material belt (packaging bags connected in a strip shape) can be guided and pulled, so that the bag material belt can move to the cutter assembly and be cut by the cutter assembly, and the single packaging bag after cutting can be accurately placed on the designated bag-feeding target object. The structural design is simple and reasonable. Further, since the plurality of fixed traction wheels 5 and the movable traction wheel 6 are respectively and correspondingly arranged at intervals on the frame 1 and the movable seat 4, the driving mechanism 2 can drive all the fixed traction wheels 5 and the movable traction wheel 6 to rotate towards each other synchronously. At the same time, since through holes are formed in the guiding rail 3 at positions corresponding to the fixed traction wheels 5 or the movable traction wheel 6, when the bag material belt enters the guiding rail 3, at this time the bag material belt is located between the fixed traction wheels 5 and the movable traction wheel 6, so that the fixed traction wheels 5 and the movable traction wheel 6 can perform rolling traction on the bag material belt, realizing the automatic continuous conveying of the bag material belt, meeting the requirements of the bag-feeding machine 100 for efficient and rapid cutting and feeding of the bag material belt, and being reliable in use.

[0034] Understandably, when the material bag belt gets stuck or blocked inside the guide rail 3, since the movable seat 4 is rotatably mounted on the frame 1, and an adjusting member 7 for controlling the rotation of the movable seat 4 is provided on the frame 1. The adjusting member 7 can be selected as a stud in the prior art, that is, by installing a stud on the movable seat 4, the staff can screw the stud to extend it downward outside the movable seat 4 and abut against the frame 1, so that the movable seat 4 can rotate upward relative to the frame 1, and then drive a plurality of movable traction wheels 6 on the movable seat 4 to disengage from the material bag belt. Thus, it is convenient for the staff to take out the material bag belt from the guide rail 3 to dredge the guide rail 3. The operation is simple, and the maintenance efficiency of the bagging machine 100 is improved.

[0035] Similarly, when it is necessary to re-clamp the material bag belt, the staff can lay the material bag belt flat in the guide rail 3 and again make the movable seat 4 rotate downward through the adjusting member 7 (screwing the stud in the reverse direction to retract it into the movable seat 4), so that a plurality of movable traction wheels 6 re-abut against the top surface of the material bag belt and cooperate with the fixed traction wheel 5 to realize the rolling traction of the material bag belt. It should be noted that by using the above method to clamp the material bag belt, the staff only needs to lay the material bag belt flat and operate the adjusting member 7, thus effectively avoiding the situation that the material bag belt pulls the staff's hand when being subjected to the traction force of the fixed traction wheel 5 and the movable traction wheel 6, eliminating the potential safety hazard of the staff's hand being pinched by the fixed traction wheel 5 and the movable traction wheel 6, and improving the use safety of the bagging machine 100.

[0036] In addition, when the present utility model is installed on the bagging machine 100, a housing (not shown in the attached drawings of the specification) for shielding and protecting the present utility model is detachably installed on the bagging machine 100.

[0037] It should be noted that since the guide rail 3 is detachably installed on the frame 1, the detachable installation method of the guide rail 3 and the frame 1 can adopt threaded connection, so that the staff can replace the guide rail 3 with a corresponding size according to the material bag belts of different specifications and sizes, thereby meeting the use requirements of the bagging machine 100 for material bag belts of various specifications and sizes, and having strong applicability.

[0038] In an embodiment, the adjusting member 7 is detachably installed on the frame 1 through a connecting frame. The adjusting member 7 can be any one of a handle, an electric push rod, a cylinder or a hydraulic cylinder. The power output end of the adjusting member 7 is detachably connected to the movable seat 4. Specifically, as Figures 3 to 5As shown, the adjusting member 7 in this embodiment is a handle. The staff can drive the movable seat 4 to rotate by rotating the handle, so as to facilitate clamping the material package belt and dredging the guiding rail 3. Compared with the method of using a stud, the staff does not need to repeatedly screw, and the operation is more convenient and fast. Further, the adjusting member 7 can also be any one of an electric push rod, a cylinder or a hydraulic cylinder. Furthermore, the staff can adjust the movable seat 4 and several movable traction wheels 6 by operating the control panel on the bag feeding machine 100 (the connection manner between the electric push rod, the cylinder or the hydraulic cylinder and the control panel is not described here), without the staff removing the shell or manually operating the adjusting member 7, which further improves the operation convenience.

[0039] In one embodiment, the driving mechanism 2 includes a driving member 8, a transmission assembly, several first rotating shafts 9 and second rotating shafts 10. The driving member 8 is detachably mounted on the frame 1 through a bracket. Several first rotating shafts 9 and second rotating shafts 10 are respectively rotatably arranged at intervals on the frame 1 and the movable seat 4. The transmission assembly is used to transmit the output power of the driving member 8 and drive several first rotating shafts 9 and second rotating shafts 10 to rotate synchronously. And a fixed traction wheel 5 and a movable traction wheel 6 are respectively detachably mounted on several first rotating shafts 9 and second rotating shafts 10. Specifically, as Figures 3 to 5 shown, the driving member 8 can be selected as a motor in the prior art, and the driving member 8 is detachably mounted on the frame 1 through a bracket, so as to facilitate the maintenance of the driving member 8. Further, since a fixed traction wheel 5 and a movable traction wheel 6 are respectively detachably mounted on several first rotating shafts 9 and second rotating shafts 10, the transmission assembly can efficiently transmit the output power of the driving member 8 to all the first rotating shafts 9 and second rotating shafts 10, so as to drive all the fixed traction wheels 5 and movable traction wheels 6 to rotate synchronously, thereby realizing the stable rolling traction of the material package belt. The structural design is simple and reasonable.

[0040] In one embodiment, the transmission assembly includes a driving gear 11 and a driven gear 12 that mesh with each other. A driving gear 11 is detachably mounted on each of several first rotating shafts 9, and a driven gear 12 is detachably mounted at a position corresponding to the driving gear 11 on each of several second rotating shafts 10. Specifically, as Figure 5 shown, since the driving gear 11 and the driven gear 12 mesh with each other, when the first rotating shaft 9 drives the driving gear 11 to rotate, at this time, the second rotating shaft 10 can rotate reversely relative to the first rotating shaft 9 under the action of the driven gear 12, so as to realize the opposite rotation of the fixed traction wheel 5 and the movable traction wheel 6, thereby meeting the conveying requirement of rolling traction of the material package belt. The structural design is ingenious and reasonable.

[0041] In one embodiment, as Figures 3 to 5As shown, both the fixed traction wheel 5 and the driving gear 11 can be limited in movement along the extension direction of the first rotating shaft 9, and both the movable traction wheel 6 and the driven gear 12 can be limited in movement along the extension direction of the second rotating shaft 10. It can be understood that the installation method of the fixed traction wheel 5 and the driving gear 11 being limited in movement with respect to the first rotating shaft 9 can be a threaded connection. That is, the fixed traction wheel 5 and the driving gear 11 are sleeved on the first rotating shaft 9 and can move along the extension direction of the first rotating shaft 9. The fixed traction wheel 5 and the driving gear 11 can be circumferentially limited on the first rotating shaft 9 by means such as key connection, and axially limited by screws, thereby enabling the position adjustment of the fixed traction wheel 5 and the driving gear 11 on the first rotating shaft 9. Similarly, the installation method of the movable traction wheel 6 and the driven gear 12 being limited in movement with respect to the second rotating shaft 10 can also be a threaded connection, and the circumferential and axial limiting methods are the same as those of the fixed traction wheel 5 and the driving gear 11, so as to enable the position adjustment of the movable traction wheel 6 and the driven gear 12 on the second rotating shaft 10, and further enable the present utility model to traction and convey a material package belt with a large specification size (width), improving the adaptability of the fixed traction wheel 5 and the movable traction wheel 6 to guiding rails 3 of different sizes.

[0042] In an embodiment, the transmission assembly further includes a transmission belt 13, a tensioning wheel 14, and a plurality of belt wheels 15. The power output end of the driving member 8 is detachably connected to a first rotating shaft 9, and belt wheels 15 are provided on a plurality of first rotating shafts 9. The transmission belt 13 is wound around the plurality of belt wheels 15, and the tensioning wheel 14 is detachably mounted on the frame 1 and abuts against the transmission belt 13. Specifically, as Figure 5 shown, when the driving member 8 operates, the belt wheel 15 on the first rotating shaft 9 connected to its power output end is driven to rotate, thereby driving the belt wheels 15 on other first rotating shafts 9 to rotate through the transmission belt 13, so as to realize the synchronous rotation of all first rotating shafts 9. The structural design is simple and reasonable. Further, by the tensioning wheel 14 abutting against the transmission belt 13, the appropriate tension of the transmission belt 13 can be maintained, ensuring the stability and efficiency of the transmission process.

[0043] In an embodiment, specifically, the fixed traction wheel 5 is made of rubber, the movable traction wheel 6 is made of metal, and anti-slip lines are formed on the outer wall of the movable traction wheel 6 along its circumference. The fixed traction wheel 5 is made of rubber material, so that the fixed traction wheel 5 can have good friction when contacting the material package belt, ensuring stable traction of the material package belt. Further, the movable traction wheel 6 made of metal material has high strength and good wear resistance. It can be understood that, as Figure 5 shown, since anti-slip lines are formed on the outer wall of the movable traction wheel 6, its traction force can be enhanced and the occurrence of slipping can be effectively prevented.

[0044] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various modifications and variations can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A guide roller assembly, arranged on a bagging machine and used for guiding and pulling a bag belt, the bagging machine comprising a frame (1) and a cutter assembly arranged on the frame (1) for cutting the bag belt, characterized in that: The invention comprises a driving mechanism (2), a guide rail (3), a movable seat (4), a plurality of fixed traction wheels (5) and a movable traction wheel (6); the plurality of fixed traction wheels (5) and the movable traction wheels (6) are arranged on the frame (1) and the movable seat (4) at intervals corresponding to each other; the movable seat (4) is rotatably mounted on the frame (1), and an adjusting member (7) for controlling the rotation of the movable seat (4) is arranged on the frame (1); the driving mechanism (2) is used to drive the plurality of fixed traction wheels (5) and the movable traction wheels (6) to rotate towards each other; the guide rail (3) is detachably mounted on the frame (1) and is used to guide the material bag belt; and a through hole is provided on the guide rail (3) at a position corresponding to the fixed traction wheel (5) or the movable traction wheel (6).

2. A guide roller set according to claim 1, characterized in that: The adjusting member (7) is detachably mounted on the frame (1) via a connecting frame; the adjusting member (7) is any one of a handle, an electric push rod, a cylinder or a hydraulic cylinder; and the power output end of the adjusting member (7) is detachably connected to the movable seat (4).

3. A guide roller set according to claim 2, characterized in that: The driving mechanism (2) comprises a driving member (8), a transmission assembly and a plurality of first rotating shafts (9) and a second rotating shaft (10); the driving member (8) is detachably mounted on the frame (1) through a bracket; the plurality of first rotating shafts (9) and the second rotating shafts (10) are rotatably arranged at intervals on the frame (1) and the movable seat (4); the transmission assembly is used to transmit the output power of the driving member (8) and drive the plurality of first rotating shafts (9) and the second rotating shafts (10) to rotate synchronously; and the plurality of first rotating shafts (9) and the second rotating shafts (10) are detachably mounted with the fixed traction wheel (5) and the movable traction wheel (6).

4. A guide roller set according to claim 3, characterized in that: The transmission assembly comprises a driving gear (11) and a driven gear (12) meshing with each other, wherein each of the first rotating shafts (9) is detachably mounted with a driving gear (11), and each of the second rotating shafts (10) is detachably mounted with a driven gear (12) at a position corresponding to the driving gear (11).

5. A guide roller set according to claim 4, characterized in that: The fixed traction wheel (5) and the driving gear (11) are both capable of limited movement along the extension direction of the first rotating shaft (9), and the movable traction wheel (6) and the driven gear (12) are both capable of limited movement along the extension direction of the second rotating shaft (10).

6. A guide roller set according to claim 3, characterized in that: The transmission assembly further comprises a transmission belt (13), a tensioning wheel (14) and a plurality of pulleys (15); the power output end of the driving member (8) is detachably connected to one of the first rotating shafts (9), and the pulleys (15) are arranged on a plurality of the first rotating shafts (9); the transmission belt (13) is wound around a plurality of the pulleys (15); the tensioning wheel (14) is detachably mounted on the frame (1) and abuts against the transmission belt (13).

7. A guide roller set according to any one of claims 1 to 6, characterized in that: The fixed traction wheel (5) is made of rubber material, the movable traction wheel (6) is made of metal material, and anti-skid patterns are formed on the outer wall of the movable traction wheel (6) along its circumference.

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