Conveying rod chain tension maintaining device for collating machine

Abstract

The invention relates to the technical field of mechanical transmission, and discloses a conveying rod chain tension maintaining device for a collating machine, which comprises a rack for supporting and mounting all parts of the device; the driving wheel is driven by a main motor, and the driven wheel and the chain guide rail guide the conveying chain to run along a set path; the conveying chain pushes book blocks in the collating machine to be conveyed through a conveying rod; the tensioning control mechanism is used for dynamically adjusting the tensioning force of the conveying chain, and the tensioning control mechanism comprises a base mounted on the rack; the piston cylinder is fixed to the base, and a piston rod of the piston cylinder drives the swing arm to rotate. The piston cylinder drives the swing arm to rotate, and dynamic tension is applied to the conveying chain through the first transition wheel and the second transition wheel, so that the tension of the chain is always in a reasonable range; and the problems of chain tooth skipping, unstable operation and abrasion caused by insufficient or overlarge tension are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical transmission, in particular to a conveying rod chain tension maintaining device for a collating machine. Background Art

[0002] As an important equipment in the printing industry, the core function of the collating machine is to arrange and transfer the printed book blocks in a predetermined order, and finally complete the production of finished books. During the operation of the collating machine, the conveyor chain, as a key transmission component, is responsible for accurately conveying the book blocks along a predetermined path. The tension of the conveyor chain is directly related to the operating stability, transmission accuracy and service life of the equipment. Therefore, how to effectively adjust and maintain the tension of the conveyor chain is an important technical issue in equipment design.

[0003] In the prior art, the tension of the conveyor chain is usually provided by a fixed tensioning device or a simple elastic structure. However, these solutions are often unable to make real-time adjustments based on the dynamic changes in the chain operation, which causes the chain to become loose or over-tensioned after long-term operation. In addition, some equipment lacks backup adjustment means when the dynamic tensioning function fails, which may cause problems such as chain tooth skipping, derailment or breakage, thereby affecting the normal operation of the equipment. Existing equipment also lacks real-time monitoring of the chain tensioning status and relies on manual inspections, which not only increases the maintenance workload, but also easily leads to hidden dangers that are not discovered in time, ultimately causing equipment failure.

[0004] The above defects of the prior art lead to the problem of unbalanced tension of the conveyor chain during operation, which is manifested as loose or over-tensioned chains, thus affecting the operational stability and efficiency of the collating machine, and even causing damage to other parts of the equipment. Therefore, how to achieve dynamic adjustment of chain tension, provide a backup tensioning function and perform real-time monitoring has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a conveyor rod chain tension maintaining device for a paging machine, which solves the problem of tension imbalance that easily occurs in the prior art during operation, specifically manifested as chain looseness or excessive tension, which in turn affects the operating stability and efficiency of the paging machine.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A conveyor bar chain tension maintaining device for a pagination machine, comprising:

[0007] A frame, which is used to support and install the components of the device;

[0008] A driving wheel, a driven wheel and a chain guide rail, wherein the driving wheel is driven by a main motor, and the driven wheel and the chain guide rail guide the conveying chain to run along a predetermined path;

[0009] A conveyor chain, which pushes the book blocks in the collating machine through the conveyor rod;

[0010] A tension control mechanism is used to dynamically adjust the tension of the conveyor chain, and the tension control mechanism includes:

[0011] A base mounted on a rack;

[0012] A piston cylinder is fixed on the base, and a piston rod of the piston cylinder drives the swing arm to rotate;

[0013] A swing arm, one end of which is hinged to the piston rod, and the other end of which is mounted with a first transition wheel and a second transition wheel, for applying tension to the conveyor chain through the first transition wheel and the second transition wheel;

[0014] A tension spring, one end of which is connected to the base and the other end of which is connected to the swing arm, for providing basic tensioning force;

[0015] A bearing, mounted at the first transition wheel and the second transition wheel, for reducing friction between the wheel axle and the swing arm and improving running stability;

[0016] The first sensor and the second sensor are respectively arranged in the tensioning path of the conveyor chain, and are used to detect the tensioning state of the conveyor chain and generate a detection signal.

[0017] Preferably, the piston cylinder is a double-acting cylinder, and its piston rod is extended and retracted under air pressure control to drive the swing arm to rotate and achieve tension adjustment of the conveyor chain.

[0018] Preferably, the swing arm is hinged to the piston rod through a first joint bearing, and is connected to the first transition wheel and the second transition wheel through a second joint bearing. The first joint bearing and the second joint bearing are used to reduce the friction loss of the swing arm during tensioning and enhance the stability of movement.

[0019] Preferably, the tension control mechanism further includes a tension spring, one end of which is fixed to the base and the other end of which is connected to the swing arm via a mounting block, for providing basic tensioning force to maintain the initial stability of the conveyor chain when the piston cylinder is not in action.

[0020] Preferably, the connection point position of the tension spring is adjustable to adjust its initial tensioning force according to the usage condition and length change of the conveyor chain.

[0021] Preferably, the tensioning control mechanism includes a manual tensioning assembly, which includes a manual tensioning wheel, a screw rod, a slider and a locking nut. The manual tensioning wheel is slidably connected to the slider through the screw rod, and the locking nut is used to fix the position of the screw rod to provide a backup manual tensioning function.

[0022] Preferably, the slider cooperates with the mounting plate to form a sliding guide structure, and the slider can slide along the guide rail of the mounting plate during the tensioning force adjustment process to achieve precise position adjustment of the manual tensioning wheel.

[0023] Preferably, the chain guide rail is made of low-friction and wear-resistant material to reduce energy loss during the operation of the conveyor chain and extend the service life of the chain and the guide rail.

[0024] Preferably, the first sensor and the second sensor respectively detect the tensioning state of the conveyor chain, and when it is detected that the tensioning force exceeds a preset range, a signal is generated to alert the operator.

[0025] Preferably, when the first sensor or the second sensor detects that the conveyor chain is broken, the device stops the operation of the collating machine to avoid further damage.

[0026] The present invention provides a conveyor chain tension maintaining device for a pagination machine, which has the following beneficial effects:

[0027] 1. The present invention drives the swing arm to rotate through the piston cylinder, and applies dynamic tensioning force to the conveyor chain through the first transition wheel and the second transition wheel to ensure that the chain tension is always within a reasonable range; the dynamic tensioning function can respond in real time to the relaxation or tension change of the chain during operation, avoiding chain tooth jumping, unstable operation and wear problems caused by insufficient or excessive tension, thereby significantly improving the stability of equipment operation.

[0028] 2. The present invention provides a backup adjustment method through the cooperation of a manual tensioning wheel, a screw rod, a slider and a locking nut. The operator can accurately adjust the chain tension by adjusting the position of the slider; the manual adjustment function is not only suitable for emergency situations where dynamic tensioning fails, but can also be used for fine adjustment of chain tension under specific working conditions, further improving the applicability and operational flexibility of the device.

[0029] 3. The present invention is equipped with a first sensor and a second sensor, which can monitor the tension state of the conveyor chain in real time. Once the chain tension exceeds the set range or the chain breaks, the sensor will generate an alarm signal and trigger the device to stop the operation of the collating machine when necessary; this real-time monitoring and automatic protection mechanism effectively reduces the risk of equipment damage caused by chain problems, while reducing the workload of manual inspections and downtime maintenance.

[0030] 4. The present invention provides a basic tensioning function for the device by arranging a tension spring. When the piston cylinder does not move or stops working due to a malfunction, the tension spring can maintain the initial tensioning force of the chain. This design effectively avoids the risk of the chain completely relaxing or falling off, and improves the fault tolerance and operation continuity of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A perspective view of the present invention;

[0032] Figure 2 An exploded view of the present invention;

[0033] Figure 3 It is a schematic diagram of the structure of the first transition wheel part of the present invention;

[0034] Figure 4 is a cross-sectional view of the present invention;

[0035] Figure 5 It is a schematic diagram of the principle of the retaining device of the present invention.

[0036] Among them, 1. frame; 2. driving wheel; 3. driven wheel; 4. main motor; 5. chain guide; 6. conveying rod; 7. conveying chain; 8. manual tensioning wheel; 9. screw rod; 10. mounting plate; 11. locking nut; 12. slider; 13. first transition wheel; 14. second transition wheel; 15. swing arm; 16. mounting block; 17. tension spring; 18. base; 19. piston cylinder; 20. first sensor; 21. second sensor; 22. bearing; 23. first joint bearing; 24. second joint bearing; 25. piston rod. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Please see attached Figure 1 -Attached Figure 5 , an embodiment of the present invention provides a conveyor bar chain tension maintaining device for a collating machine, comprising:

[0039] A frame 1, which is used to support and install various components of the device;

[0040] A driving wheel 2, a driven wheel 3 and a chain guide 5, wherein the driving wheel 2 is driven by a main motor 4, and the driven wheel 3 and the chain guide 5 guide the conveying chain 7 to run along a predetermined path;

[0041] A conveying chain 7, which pushes the book blocks in the collating machine through the conveying rod 6;

[0042] The tension control mechanism is used to dynamically adjust the tension of the conveyor chain 7. The tension control mechanism includes:

[0043] A base 18 mounted on the frame 1;

[0044] A piston cylinder 19 is fixed on the base 18, and a piston rod 25 of the piston cylinder 19 drives the swing arm 15 to rotate;

[0045] A swing arm 15, one end of which is hinged to the piston rod 25, and the other end of which is mounted with a first transition wheel 13 and a second transition wheel 14, for applying tension to the conveying chain 7 through the first transition wheel 13 and the second transition wheel 14;

[0046] A tension spring 17, one end of which is connected to the base 18 and the other end of which is connected to the swing arm 15, for providing basic tensioning force;

[0047] Bearings 22, mounted on the first transition wheel 13 and the second transition wheel 14, are used to reduce the friction between the wheel shaft and the swing arm 15 and improve the running stability;

[0048] The first sensor 20 and the second sensor 21 are respectively arranged in the tensioning path of the conveyor chain 7 to detect the tensioning state of the conveyor chain 7 and generate a detection signal.

[0049] In one embodiment, the conveying chain 7 is driven by the driving wheel 2, and runs along a predetermined path through the driven wheel 3 and the chain guide 5; the conveying chain 7 is connected to the conveying rod 6, and the book block in the pagination machine is pushed to move along a predetermined track through the conveying rod 6, so as to complete the arrangement and transmission of the book signatures; the tensioning control mechanism is centered on the piston cylinder 19, and the piston rod 25 of the piston cylinder 19 is extended and retracted under the action of air pressure, and drives the swing arm 15 to rotate around a fixed fulcrum through the mounting block 16; the first transition wheel 13 and the second transition wheel 14 are installed at the end of the swing arm 15, and the transition wheels are flexibly rotated under the support of the bearing 22, and apply tension to the conveying chain 7; as the tension of the conveying chain 7 changes during operation, the piston cylinder 19 adjusts the position of the piston rod 25 in real time, and the swing arm 15 adjusts the angle accordingly, thereby dynamically balancing the chain tension and ensuring that the chain is always in the best tension state;

[0050] One end of the tension spring 17 is fixed to the base 18, and the other end is connected to the swing arm 15. When the piston cylinder 19 does not move or stops due to a fault, the elastic force of the tension spring 17 can drive the swing arm 15 to maintain the basic tensioning state of the chain; the basic tensioning function provides redundant protection for the device to avoid the situation where the chain is too loose or even derailed due to failure of dynamic tensioning; the chain guide 5 is made of low-friction and wear-resistant material to provide precise path guidance for the conveying chain 7 and reduce deviation during operation; through the low-friction design between the guide rail and the chain, and the support of the bearings 22 of the first transition wheel 13 and the second transition wheel 14, the device greatly reduces the energy consumption and friction noise during operation, ensuring smooth and efficient operation of the chain.

[0051] The piston cylinder 19 is a double-acting cylinder, and its piston rod 25 is extended and retracted under air pressure control to drive the swing arm 15 to rotate and realize the tension adjustment of the conveyor chain 7; the swing arm 15 is hinged to the piston rod 25 through the first joint bearing 23, and is connected to the first transition wheel 13 and the second transition wheel 14 through the second joint bearing 24. The first joint bearing 23 and the second joint bearing 24 are used to reduce the friction loss of the swing arm 15 during the tensioning process and enhance the stability of the movement.

[0052] In one embodiment, through the design of a double-acting piston cylinder 19, its piston rod 25 can be flexibly extended and retracted in the positive and negative directions, and is driven by air pressure to form a bidirectional power, making the tension adjustment process faster and more accurate; compared with a one-way cylinder, a double-acting cylinder can achieve a larger adjustment range and a higher response speed, thereby improving the flexibility of adjusting the tension of the conveyor chain 7 during operation; the design of the first joint bearing 23 and the second joint bearing 24 greatly reduces the friction loss generated by the swing arm 15 during rotation, and the self-aligning characteristics of the first joint bearing 23 and the second joint bearing 24 can avoid the problem of offset or jamming of the swing arm 15; the first joint bearing 23 ensures that the articulation of the piston rod 25 and the swing arm 15 is more flexible, so that the force generated by the cylinder can be accurately transmitted to the swing arm 15, avoiding force loss or unstable movement of the swing arm 15 caused by improper articulation; the second joint bearing 24 accurately transmits the movement of the swing arm 15 to the first transition wheel 13 and the second transition wheel 14, ensuring that the conveyor chain 7 maintains stable operation during dynamic tensioning, avoiding tooth jumping or jitter problems.

[0053] The tension control mechanism further includes a tension spring 17 , one end of which is fixed to the base 18 , and the other end of which is connected to the swing arm 15 via the mounting block 16 , for providing basic tensioning force to maintain the initial stability of the conveyor chain 7 when the piston cylinder 19 is not in action.

[0054] In one embodiment, one end of the tension spring 17 is fixed to the base 18, and the other end is connected to the swing arm 15 through the mounting block 16. In the initial stage of equipment operation or when the piston cylinder 19 is not in motion, the tension spring 17 pulls the swing arm 15 through its elastic force, so that the first transition wheel 13 and the second transition wheel 14 on the swing arm 15 apply basic tension to the conveying chain 7; when the piston cylinder 19 is in normal operation, the tension spring 17 and the piston cylinder 19 work together, and the basic tension provided by the tension spring 17 can reduce the burden of the piston cylinder 19, so that the adjustment range of the piston cylinder 19 is more concentrated on the dynamically changing part; when the piston cylinder 19 stops working, the tension spring 17 automatically takes over the tensioning function to avoid the chain tension from being completely out of control due to the failure of the piston cylinder 19.

[0055] The tensioning control mechanism includes a manual tensioning assembly, which includes a manual tensioning wheel 8, a screw rod 9, a slider 12 and a locking nut 11. The manual tensioning wheel 8 is slidably connected to the slider 12 through the screw rod 9. The locking nut 11 is used to fix the position of the screw rod 9 to provide a backup manual tensioning function; the slider 12 cooperates with the mounting plate 10 to form a sliding guide structure. The slider 12 can slide along the guide rail of the mounting plate 10 during the tensioning force adjustment process to achieve precise position adjustment of the manual tensioning wheel 8.

[0056] In one embodiment, the manual tensioning wheel 8 is slidably connected to the slider 12 through the screw rod 9, and the slider 12 forms a sliding guide structure on the guide rail of the mounting plate 10; during adjustment, the operator drives the slider 12 to slide along the guide rail by rotating the screw rod 9, so that the position of the manual tensioning wheel 8 changes; the position change of the manual tensioning wheel 8 will directly affect the tensioning state of the conveying chain 7, thereby realizing precise adjustment of the tensioning force; the sliding of the slider 12 is controlled by the screw rod 9, and the movement of the slider 12 along the guide rail of the mounting plate 10 ensures the stability and accuracy of the tensioning wheel during adjustment; after the adjustment is completed, the position of the screw rod 9 is fixed by the locking nut 11 to prevent the slider 12 from being displaced due to vibration or load changes during operation; the locking function ensures the long-term stability of the manual tensioning wheel 8 and provides reliable protection for the operation of the equipment.

[0057] The chain guide rail 5 is made of low-friction and wear-resistant material to reduce energy loss during the operation of the conveyor chain 7 and to extend the service life of the chain and the guide rail.

[0058] In one embodiment, the chain guide 5 is made of a low-friction and wear-resistant material with a smooth surface and a low friction coefficient; when the conveying chain 7 runs on the guide, the contact friction between the guide surface and the chain is significantly reduced, thereby reducing the friction resistance during the operation of the chain.

[0059] The first sensor 20 and the second sensor 21 respectively detect the tensioning state of the conveyor chain 7. When it is detected that the tensioning force exceeds a preset range, a signal is generated to alert the operator. When the first sensor 20 or the second sensor 21 detects that the conveyor chain 7 is broken, the device stops the operation of the paginator to avoid further damage.

[0060] In one embodiment, the first sensor 20 and the second sensor 21 are respectively arranged in the tensioning path of the conveyor chain 7 to monitor the tension state of the chain in real time; when the tension of the chain exceeds the preset upper and lower limits, such as too loose or too tight, the sensor will generate an electrical signal and transmit the abnormal information to the control system or alarm device of the equipment; when the first sensor 20 or the second sensor 21 detects that the conveyor chain 7 is broken, the sensor will immediately send a signal to the equipment control system to trigger the automatic shutdown function of the paging machine; after the shutdown, the operation of the chain is completely stopped to prevent the broken chain from continuing to run and causing further impact or damage to the driving wheel 2, the driven wheel 3 and the guide rail.

[0061] Working principle: The device uses the frame as the overall supporting structure, and the driving wheel, driven wheel and chain guide are installed on the frame. The driving wheel is driven by the main motor, and the conveying chain cooperates with the driven wheel to realize the continuous operation of the chain; the chain guide is used to guide the running path of the conveying chain to reduce deviation and friction during operation. The conveyor chain is connected to the conveyor rod, which is used to push the book core in the collating machine to move along a predetermined trajectory to complete the arrangement and transmission of the book signatures. In order to solve the tension problem of the conveyor chain during operation, the device is adjusted through a tension control mechanism. The mechanism is installed on the frame with a base as the core supporting component. The piston cylinder is fixed on the base. The piston cylinder is a double-acting cylinder. Its piston rod can be extended and retracted under the action of air pressure to drive the swing arm connected to the end of the piston rod to rotate. One end of the swing arm is hinged with the piston rod through a mounting block, and the other end is installed with a first transition wheel and a second transition wheel. The transition wheel is supported by a bearing. The design of the bearing can greatly reduce the friction between the wheel shaft and the swing arm, making the rotation of the swing arm more stable, and applying precise tension to the conveyor chain through the transition wheel. The device is also equipped with a tension spring, one end of which is connected to the base, and the other end is connected to the swing arm through a mounting block. The function of the tension spring is to provide basic tension. When the piston cylinder does not move or fails, the tension spring can maintain the initial tension state of the conveyor chain to ensure that the chain does not become excessively loose. In addition, the first sensor and the second sensor in the device are respectively arranged on the tensioning path of the conveyor chain to detect the tension state of the conveyor chain in real time. When the chain tension exceeds the preset range or the chain breaks, the sensor will generate a signal to remind the operator and trigger the device to stop the operation of the paginator when necessary, so as to avoid further damage. At the same time, in order to cope with the failure of automatic tensioning under special working conditions, the device also has a manual tensioning component. The manual tensioning wheel is connected to the slider through a screw rod, and the slider can slide along the guide rail of the mounting plate. The tension of the chain is accurately adjusted by adjusting the sliding position of the slider. At the same time, the position of the screw rod is fixed by a locking nut to ensure the stability of manual adjustment. In addition, the chain guide rail is made of low-friction and wear-resistant material, which can not only effectively reduce the friction energy consumption of the conveyor chain during operation, but also extend the service life of the chain and the guide rail. Combined with the dynamic tensioning function driven by the piston cylinder and the manual tensioning function, the device can effectively prevent the problems of tooth skipping, excessive looseness or wear during the operation of the conveyor chain, while greatly reducing the operating noise and ensuring the stability and efficiency of the paginator operation.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A conveyor chain tension maintaining device for a collating machine, characterized in that: include: A frame (1) for supporting and installing the components of the device; A driving wheel (2), a driven wheel (3) and a chain guide rail (5), wherein the driving wheel (2) is driven by a main motor (4), and the driven wheel (3) and the chain guide rail (5) guide the conveying chain (7) to run along a predetermined path; A conveying chain (7) which pushes the book blocks in the collating machine to be conveyed via a conveying rod (6); A tension control mechanism, used for dynamically adjusting the tension of the conveyor chain (7), the tension control mechanism comprising: A base (18) mounted on the frame (1); A piston cylinder (19) is fixed on the base (18), and a piston rod (25) of the piston cylinder (19) drives the swing arm (15) to rotate; A swing arm (15), one end of which is hinged to the piston rod (25), and the other end of which is mounted with a first transition wheel (13) and a second transition wheel (14), and is used to apply tension to the conveying chain (7) through the first transition wheel (13) and the second transition wheel (14); A tension spring (17), one end of which is connected to the base (18) and the other end of which is connected to the swing arm (15), for providing basic tensioning force; A bearing (22) is installed at the first transition wheel (13) and the second transition wheel (14) to reduce friction between the wheel shaft and the swing arm (15) and improve running stability; The first sensor (20) and the second sensor (21) are respectively arranged in the tensioning path of the conveying chain (7) and are used to detect the tensioning state of the conveying chain (7) and generate a detection signal.

2. A conveyor bar chain tension maintaining device for a collating machine according to claim 1, characterized in that: The piston cylinder (19) is a double-acting cylinder, and its piston rod (25) is extended and retracted under air pressure control to drive the swing arm (15) to rotate and realize the tension adjustment of the conveying chain (7).

3. A conveyor bar chain tension maintaining device for a collating machine according to claim 1, characterized in that: The swing arm (15) is hinged to the piston rod (25) via a first joint bearing (23), and is connected to the first transition wheel (13) and the second transition wheel (14) via a second joint bearing (24); the first joint bearing (23) and the second joint bearing (24) are used to reduce the friction loss of the swing arm (15) during the tensioning process and enhance the stability of the movement.

4. A conveyor bar chain tension maintaining device for a collating machine according to claim 1, characterized in that: The tension control mechanism further comprises a tension spring (17), one end of which is fixed to the base (18), and the other end of which is connected to the swing arm (15) via a mounting block (16), and is used to provide basic tensioning force to maintain the initial stability of the conveying chain (7) when the piston cylinder (19) is not in action.

5. The conveyor bar chain tension maintaining device for a collating machine according to claim 1, characterized in that: The connection point position of the tension spring (17) is adjustable so as to adjust its initial tensioning force according to the use condition and length change of the conveying chain (7).

6. A conveyor bar chain tension maintaining device for a collating machine according to claim 1, characterized in that: The tensioning control mechanism comprises a manual tensioning assembly, which comprises a manual tensioning wheel (8), a screw rod (9), a slider (12) and a locking nut (11). The manual tensioning wheel (8) is slidably connected to the slider (12) via the screw rod (9), and the locking nut (11) is used to fix the position of the screw rod (9) to provide a backup manual tensioning function.

7. A conveyor bar chain tension maintaining device for a collating machine according to claim 6, characterized in that: The slider (12) cooperates with the mounting plate (10) to form a sliding guide structure. The slider (12) can slide along the guide rail of the mounting plate (10) during the tensioning force adjustment process to achieve precise position adjustment of the manual tensioning wheel (8).

8. The conveyor bar chain tension maintaining device for a collating machine according to claim 1, characterized in that: The chain guide rail (5) is made of low-friction and wear-resistant material, and is used to reduce energy loss during the operation of the conveying chain (7) and to extend the service life of the chain and the guide rail.

9. A conveyor bar chain tension maintaining device for a collating machine according to claim 1, characterized in that: The first sensor (20) and the second sensor (21) respectively detect the tension state of the conveyor chain (7), and when it is detected that the tension exceeds a preset range, a signal is generated to alert an operator.

10. The conveyor bar chain tension maintaining device for a collating machine according to claim 1, characterized in that: When the first sensor (20) or the second sensor (21) detects that the conveying chain (7) is broken, the device stops the operation of the collating machine to avoid further damage.

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