Handle strip conveying mechanism of bag making machine

Abstract

The utility model discloses a handle strip conveying mechanism of a bag making machine. The handle strip conveying mechanism comprises a machine frame, a conveying assembly installed on the machine frame and a tensioning assembly which is installed on the machine frame and located on an input path of the conveying assembly. Wherein the conveying assembly comprises a plurality of guide wheels which are sequentially installed on the machine frame in the conveying direction of the handle strips, and the tensioning assembly comprises a moving part which can be movably arranged on the machine frame relative to the machine frame and a balance weight guide wheel rotationally connected to the moving part. In the handle strip conveying process of the handle strip conveying mechanism, when the handle strips tend to be loosened, the moving component moves relative to the rack and is linked with the balance weight guide wheel to move relative to the rack, so that the handle strips wound on the guide wheels and the balance weight guide wheel are tensioned by the balance weight guide wheel in time, and the handle strips are prevented from being loosened. And therefore, the handle strip is continuously kept in a tensioned state, and the problem that the handle strip is disengaged from the counterweight guide wheel or a plurality of guide wheels due to the fact that the position of the handle strip deviates due to loosening of the handle strip is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of three-dimensional bag forming, in particular to a hand-pull strip conveying mechanism of a bag-making machine. Background Art

[0002] Bag making machines are specialized equipment used to produce packaging bags made of materials such as plastic and non-woven fabrics. They are primarily used in the packaging needs of industries such as clothing, food, and gifts. For example, a bag making machine can produce shopping bags, clothing bags, and food bags.

[0003] Generally speaking, in the process of producing packaging bags by a bag-making machine, it is necessary to set a handle on the edge of the opening of the packaging bag, that is, a handle. When the bag-making machine processes the handle on the bag blank for the packaging bag, it is generally necessary to first convey the handle strip to the handle forming mechanism. However, in the process of conveying the handle strip to the handle forming mechanism by the bag-making machine in the prior art, when the handle strip is conveyed on the handle strip conveying mechanism, if the machine is stopped, or the handle strip conveying speed is slowed down, or the forming speed of the handle forming device of the bag-making machine is slowed down, the handle strip on the guide wheel of the handle strip conveying mechanism will be in a relaxed state, and there is a problem that the position of the handle strip is offset or the handle strip falls off the guide wheel. Utility Model Content

[0004] The purpose of the utility model is to solve the problem in the prior art that when a hand strap is conveyed on a hand strap conveying mechanism and the hand strap on the guide wheel of the hand strap conveying mechanism is in a relaxed state, the position of the hand strap may be offset or the hand strap may fall off the guide wheel.

[0005] In order to solve the above problems, the utility model provides a hand-pull conveying mechanism of a bag-making machine, comprising a frame, a conveying assembly mounted on the frame, and a tensioning assembly mounted on the frame and located on the input path of the conveying assembly; wherein the conveying assembly comprises a plurality of guide wheels sequentially mounted on the frame along the conveying direction of the hand-pull, the tensioning assembly comprises a movable component movably arranged on the frame relative to the frame, and a counterweight guide wheel rotatably connected to the movable component, and the counterweight guide wheel and the plurality of guide wheels are all located on the same side of the frame.

[0006] Moreover, during the conveying process of the hand strap, the hand strap is sequentially wound around a plurality of guide wheels and a counterweight guide wheel along the conveying direction, and the movable component can move relative to the frame and tighten the hand strap through the counterweight guide wheel.

[0007] By adopting the above technical solution, when the wrist strip is conveyed to the hand-handle forming device of the bag-making machine through the hand-handle conveying mechanism, the wrist strip is sequentially wound around multiple guide wheels and the counterweight guide wheel along the conveying direction, and one end of the wrist strip entering the hand-handle forming device of the bag-making machine is tightened by the hand-handle forming device. Since the movable part can move relative to the frame, the counterweight guide wheel can be linked to move relative to the frame by the movement of the movable part relative to the frame, so that the hand strip wrapped around the multiple guide wheels and the counterweight guide wheel is tightened by the counterweight guide wheel, and the hand strip continues to be tightened by the counterweight guide wheel, so that the hand strip is tightly fitted with the multiple guide wheels and the counterweight guide wheel, the position will not be offset, and the hand strip will not fall off from the counterweight guide wheel or the multiple guide wheels.

[0008] In addition, when the hand strap conveying mechanism is in the process of conveying the hand strap, even if the forming speed of the hand strap forming device of the bag making machine slows down or the machine stops, causing the hand strap to tend to loosen during the conveying process, the moving component moves relative to the frame to link the counterweight guide wheel to move relative to the frame, so that the hand strap wrapped around multiple guide wheels and the counterweight guide wheel is tightened by the counterweight guide wheel in time, thereby keeping the hand strap in a tightened state, avoiding the problem of the hand strap position being offset and falling off from the counterweight guide wheel or multiple guide wheels due to the relaxation of the hand strap.

[0009] The embodiment of the present utility model further discloses a hand strap conveying mechanism of a bag making machine, wherein in the conveying direction of the hand strap, the counterweight guide wheel is located at the upstream end of the plurality of guide wheels.

[0010] By adopting the above technical solution, in the conveying direction of the hand-pulled strips, the counterweight guide wheel is located at the upstream end of multiple guide wheels, and the hand-pulled strips can be directly conveyed to the multiple counterweight guide wheels through the counterweight guide wheel, so that the hand-pulled strips located on multiple guide wheels can be tightened by the counterweight guide wheel, and there is no need to set other structures at the input end of the conveying component to limit the hand-pulled strips, thereby making the hand-pulled strip conveying mechanism structure of this bag making machine simpler.

[0011] An embodiment of the utility model also discloses a hand-pull conveying mechanism of a bag-making machine, wherein the moving parts include a slider and a counterweight block that is detachably fixed to one side of the slider; wherein a slide rail extending along the height direction of the frame is provided on the frame, the slider is slidably connected to the slide rail, and the counterweight block is fixed to the end of the slider away from the slide rail; and the counterweight guide wheel is rotatably provided on one side of the slider.

[0012] During the transportation of the handrail, the counterweight block drives the slider to move horizontally along the slide rail under the action of gravity, and the counterweight guide wheel tightens the handrail.

[0013] By adopting the above technical solution, during the transportation of the hand strap, the counterweight block drives the slider to move horizontally along the slide rail under the action of gravity, so that the counterweight guide wheel tightens the hand strap. During this process, the counterweight block, slider and counterweight guide wheel jointly apply gravity to the hand strap, increasing the tensioning force of the hand strap, so that the hand strap can be transported more reliably and the position will not be shifted.

[0014] An embodiment of the present utility model also discloses a hand-pull strip conveying mechanism for a bag-making machine, wherein the moving part also includes a clamping part; wherein the clamping part includes a pressure plate movably arranged on the other side of the slide rail relative to the slider; and when the hand-pull strip stops conveying, the pressure plate is pressed against the other side surface of the slide rail and fixes the slider relative to the frame.

[0015] By adopting the above technical solution, when the size of the handrail needs to be replaced, or when the handrail stops conveying during maintenance of the machine, the slider will be subjected to its own gravity and the gravity of the counterweight block and the counterweight guide wheel, which will cause the tensioning assembly as a whole to move downward in the height direction. By setting a pressure plate to press on the other side of the slider, the slider can be fixed relative to the frame, thereby avoiding the problem of the slider moving downward in the height direction due to its own gravity and the gravity of the counterweight block and the counterweight guide wheel. As a result, the tensioning assembly as a whole will not move downward in the height direction and hit the frame without the handrail being tightened, causing damage to its own structure.

[0016] The embodiment of the present utility model also discloses a hand-pull conveying mechanism of a bag making machine, wherein the pressing part further includes a mounting seat and a driving cylinder fixedly mounted on the mounting seat and with a driving end extending toward the slide rail, and the pressing plate is fixed to the driving end of the driving cylinder.

[0017] Furthermore, when the hand strap stops being transported, the driving end of the driving cylinder drives the pressing plate to press against the other side surface of the slide rail.

[0018] By adopting the above technical solution, when the size of the handrail needs to be replaced, or when the handrail stops conveying during maintenance of the machine, the driving end of the driving cylinder drives the pressure plate toward the other side surface of the slide rail, and then presses the pressure plate against the other side surface of the slide rail, so that the pressure plate and the driving cylinder are fixed relative to the slide rail, and the slider is also fixed relative to the frame, thereby avoiding the slider from moving downward in the height direction due to its own gravity and the gravity of the counterweight block and the counterweight guide wheel, thereby causing damage to the overall structure of the tensioning assembly.

[0019] Moreover, by driving the air cylinder to drive the pressure plate to press fit against the other side surface of the slide rail, there is no need to fix the pressure plate by manual installation. On the one hand, it has the advantage of facilitating the fixation of the slider relative to the slide rail, and on the other hand, it makes the hand-pull conveyor structure of this bag-making machine have the advantage of a high degree of mechanization.

[0020] An embodiment of the present utility model also discloses a hand-pull conveying mechanism for a bag-making machine, wherein the pressure plate and the other side surface of the slide rail are respectively formed with mutually adapted pressing teeth; wherein, when the pressure plate is pressed against the other side surface of the slide rail, the respective pressing teeth engage with each other.

[0021] By adopting the above technical solution, mutually matching pressing teeth are formed on the pressure plate and the other side surface of the slide rail. When the pressure plate is pressed against the other side surface of the slide rail, the pressing teeth on the pressure plate and the other side surface of the slide rail engage with each other, thereby increasing the friction between the pressure plate and the slide rail, reducing the risk of the pressure plate sliding again relative to the slide rail when it is pressed against the other side surface of the slide rail, and thereby ensuring that the tensioning assembly as a whole is reliably fixed on the slide rail.

[0022] An embodiment of the utility model also discloses a hand-pull conveying mechanism of a bag-making machine, wherein the mounting seat includes a pair of mounting plates fixed on both sides of a slider, and a fixed plate away from an end of one side of the slider, the driving cylinder is fixed on the fixed plate and is located between the pair of mounting plates, and the end of the pair of mounting plates away from the slider is fixedly connected to the fixed plate; and the clamping part also includes a plurality of elastic members located between the relative surfaces of the pressing plate and the fixed plate.

[0023] The elastic member is a coil spring extending along the moving direction of the pressing portion and having two ends fixed on the opposite surfaces of the pressing plate and the fixed plate respectively; and the plurality of coil springs are evenly distributed on the circumference of the pressing plate.

[0024] By adopting the above technical solution, a pair of mounting plates are set up. When the pressure plate is driven by the driving end of the driving cylinder to move toward the other side surface of the slide rail and then pressed against the other side surface of the slide rail, the driving cylinder, the pressure plate, and the fixed plate are all fixed relative to the frame. Since the fixed plate is fixedly connected to the slider through a pair of mounting plates, when the fixed plate is fixed, the slider can be synchronously linked to be fixed relative to the slide rail. Therefore, the hand-pull conveying mechanism of this bag-making machine also has the advantage of high synchronization.

[0025] In addition, by arranging multiple coil springs evenly distributed on the circumference of the pressure plate, the driving cylinder works. When the driving end of the driving cylinder retracts, the coil spring is squeezed by the pressure plate. At this time, the slider can move relative to the frame in the height direction. At this time, the coil spring is in a compressed state. When the pressure plate is required to be pressed against the other side surface of the slide rail, the driving end of the driving cylinder drives the pressure plate toward the other side surface of the slide rail, so that the pressure plate is pressed tightly against the other side surface of the slide rail, and at this time, multiple coil springs also apply pre-tightening force to the pressure plate, so that the pressure plate is more reliably fitted to the other side surface of the slide rail; and even if the driving cylinder is damaged or not working, the pressure plate can be pressed against the other side surface of the slide rail by the elastic force of the coil spring, thereby ensuring the reliability of the slider when it is fixed relative to the slide rail.

[0026] An embodiment of the present utility model also discloses a hand strap conveying mechanism of a bag making machine, which also includes a lower protective part and an upper protective part; wherein the upper protective part is located above the moving part and has an elastic protective protrusion extending toward the top of the moving part in the height direction.

[0027] In addition, the lower protection portion is arranged at the lower end of the frame, is located directly below the moving component in the height direction, and has an elastic protection protrusion facing the moving component.

[0028] By adopting the above technical solution and providing the upper and lower protection parts, the problem of the moving parts being damaged when the moving parts collide with the upper or lower end of the frame when moving in the height direction is avoided.

[0029] An embodiment of the utility model also discloses a hand-pull conveying mechanism of a bag-making machine, wherein the moving parts include a connecting rod and a counterweight block detachably fixed to the connecting rod; wherein one end of the connecting rod is rotatably arranged on the frame, and the counterweight block is fixed to the other end of the connecting rod away from the frame.

[0030] In addition, the counterweight guide wheel is rotatably arranged on one side of the counterweight block; wherein, during the transportation of the handrail, the counterweight block drives the connecting rod to rotate freely relative to the frame under the action of gravity, and the counterweight guide wheel tightens the handrail.

[0031] By adopting the above technical solution, when the hand strap conveying mechanism is conveying the hand strap, even if the forming speed of the hand strap forming device of the bag making machine slows down or the machine stops, resulting in the hand strap having a tendency to loosen during the conveying process, since one end of the connecting rod is rotatably connected to the frame, when the hand strap has a tendency to loosen and will not tighten the counterweight guide wheel, the counterweight guide wheel will swing downward relative to the frame through the connecting rod, thereby causing the counterweight guide wheel to tighten the hand strap again, thereby causing the hand strap wrapped around multiple guide wheels and the counterweight guide wheel to be tightened in time by the counterweight guide wheel and to remain in a tightened state, thereby avoiding the problem of the hand strap position being offset and falling off from the counterweight guide wheel or multiple guide wheels due to the relaxation of the hand strap.

[0032] Furthermore, a counterweight block is provided at the other end of the guide rod, and the counterweight block and the counterweight guide wheel can jointly apply tension to the hand strap, thereby increasing the tension on the wrist strap, so that when the hand strap has a tendency to relax and will not tighten the counterweight guide wheel, it can be tightened in time.

[0033] Furthermore, since one end of the connecting rod is rotatably connected to the frame, the connecting rod will not move in the height direction, thereby limiting the counterweight block and the counterweight guide wheel in the height direction of the frame, avoiding the problem of the guide wheel and the counterweight block falling from the frame in the height direction when replacing the handle bar.

[0034] An embodiment of the present utility model also discloses a hand-pull conveying mechanism of a bag-making machine, and the moving part also includes a locking assembly; wherein the locking assembly includes a locking recess arranged on the frame and opposite to the connecting rod, and the locking recess is recessed inward toward the surface of the connecting rod and has an elastic protective layer.

[0035] Furthermore, when the hand strap stops being transported, the connecting rod hangs down freely and is locked in the locking recess.

[0036] By adopting the above technical solution and setting up a locking assembly, when the hand pull bar is replaced or the hand pull bar is used up, there is no need to tighten the hand pull bar again through the counterweight guide wheel. By allowing the connecting rod to hang freely and clamp it in the locking recess, the counterweight guide wheel will not swing relative to the frame, thereby facilitating the replacement of the hand pull bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of the overall structure of the hand strap conveying mechanism of the bag making machine provided by an embodiment of the utility model at one viewing angle;

[0038] Figure 2 A schematic diagram of the overall structure of the hand strap conveying mechanism of the bag making machine provided by an embodiment of the utility model from another perspective;

[0039] Figure 3 A partial schematic diagram of the hand strap conveying mechanism of the bag making machine provided in an embodiment of the utility model.

[0040] Description of reference numerals:

[0041] 1. Hand-pull conveying mechanism;

[0042] 2. Frame; 20. Slide rail; 21. Upper protection part; 22. Lower protection part.

[0043] 3. Conveying assembly; 30. Guide wheel;

[0044] 4. Tension components;

[0045] 40. Counterweight guide wheel;

[0046] 41. Moving parts;

[0047] 410. Slider; 411. Counterweight; 412. Pressure plate; 413. Mounting seat; 414. Driving cylinder; 415. Mounting plate; 416. Coil spring; 417. Fixing plate. DETAILED DESCRIPTION

[0048] As described in the background technology, in the process of producing packaging bags by a bag making machine, it is necessary to set a handle on the edge of the opening of the packaging bag, that is, a handle. When the bag making machine processes the handle on the bag blank for the packaging bag, it is generally necessary to first convey the handle strip to the handle forming mechanism. However, in the process of conveying the handle strip to the handle forming mechanism by the bag making machine in the prior art, when the handle strip is conveyed on the handle strip conveying mechanism, if the machine is stopped, or the conveying speed of the handle strip is slowed down, or the forming speed of the handle forming device of the bag making machine is slowed down, the handle strip on the guide wheel of the handle strip conveying mechanism will be in a relaxed state, and there is a problem that the position of the handle strip is offset or the handle strip falls off the guide wheel.

[0049] To address the above-mentioned problems, the present invention provides a hand strap conveying mechanism for a bag making machine, comprising a frame, a conveying assembly mounted on the frame, and a tensioning assembly mounted on the frame and located on an input path of the conveying assembly. The conveying assembly includes a plurality of guide wheels sequentially mounted on the frame along the conveying direction of the hand strap, and the tensioning assembly includes a moving member movably disposed on the frame relative to the frame, and a counterweight guide wheel rotatably connected to the moving member, wherein the counterweight guide wheel and the plurality of guide wheels are located on the same side of the frame. When the hand strap conveying mechanism is conveying the hand strap, even if the hand strap tends to loosen during conveyance due to a slowdown in the forming speed of a hand strap forming device of the bag making machine or a shutdown of the machine, the moving member moves relative to the frame, thereby causing the counterweight guide wheel to move relative to the frame, thereby causing the hand strap wrapped around the plurality of guide wheels and the counterweight guide wheel to be promptly tensioned by the counterweight guide wheel, thereby maintaining the hand strap in a continuously tensioned state and preventing the hand strap from shifting and falling off the counterweight guide wheel or the plurality of guide wheels due to the hand strap loosening.

[0050] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0051] like Figure 1 and Figure 2 As shown, this embodiment provides a hand strap conveying mechanism 1 of a bag making machine, which is used to convey the hand strap used to make the hand strap (also known as the handle) of the packaging bag during the forming process of the packaging bag. The hand strap conveying mechanism 1 of the bag making machine includes a frame 2, a conveying component 3 installed on the frame 2, and a tensioning component 4 installed on the frame 2 and located on the input path of the conveying component 3; when the conveying component 3 conveys the hand strap, the tensioning component 4 can continuously tighten the hand strap in conveyance, so that the hand strap is in a tensioned state, thereby preventing the hand strap from shifting in position during the conveying process.

[0052] Specifically, to facilitate conveying the hand strap, a conveying assembly 3 is provided, including a plurality of guide wheels 30 sequentially mounted on the frame 2 along the conveying direction of the hand strap. When conveying the hand strap, the hand strap is sequentially wound around the plurality of guide wheels 30. It should be understood that the number of the plurality of guide wheels 30 can be two, five, six, etc., and this embodiment is not limited thereto.

[0053] More specifically, the tensioning assembly 4 includes a movable component 41 movably arranged on the frame 2 relative to the frame 2, and a counterweight guide wheel 40 rotatably connected to the movable component 41. The counterweight guide wheel 40 and the multiple guide wheels are all located on the same side of the frame 2. During the conveying process of the hand strap, the hand strap is sequentially wound around the multiple guide wheels 30 and the counterweight guide wheel 40 along the conveying direction. The movable component 41 can move relative to the frame 2 and tighten the hand strap through the counterweight guide wheel 40, so that the hand strap is continuously tightened.

[0054] To sum up, the working principle of this conveying mechanism is as follows: when the wrist strip is conveyed to the hand-handle forming device of the bag-making machine through this hand-handle conveying mechanism 1, the wrist strip is sequentially wound through multiple guide wheels 30 and counterweight guide wheels 40 along the conveying direction, and one end of the wrist strip entering the hand-handle forming device of the bag-making machine is tightened by the hand-handle forming device. Since the movable component 41 can move relative to the frame 2, the counterweight guide wheel 40 can be linked to move relative to the frame 2 by the movement of the movable component 41 relative to the frame 2, so that the hand strip wrapped around the multiple guide wheels 30 and the counterweight guide wheel 40 is tightened by the counterweight guide wheel 40, and the hand strip continues to be tightened by the counterweight guide wheel 40, so that the hand strip is tightly fitted with the multiple guide wheels 30 and the counterweight guide wheel 40, and the position will not be offset, and the hand strip will not fall off from the counterweight guide wheel 40 or the multiple guide wheels 30.

[0055] In addition, when the hand strap conveying mechanism 1 is in the process of conveying the hand strap, even if the forming speed of the hand strap forming device of the bag making machine slows down or the machine stops, causing the hand strap to tend to loosen during the conveying process, the moving component 41 moves relative to the frame 2 to link the counterweight guide wheel 40 to move relative to the frame 2, so that the hand strap wrapped around the multiple guide wheels 30 and the counterweight guide wheel 40 is timely tightened by the counterweight guide wheel 40, thereby keeping the hand strap in a tightened state, avoiding the problem of the hand strap position being offset and falling off from the counterweight guide wheel 40 or multiple guide wheels 30 due to the relaxation of the hand strap.

[0056] In summary, since the hand strap conveying mechanism 1 keeps the hand strap in a stretched state during the conveying process, the risk of the hand strap position being offset and falling off the counterweight guide wheel 40 or multiple guide wheels 30 is reduced, thereby improving the efficiency of the bag making machine in producing packaging bags.

[0057] The following further explains the location of the counterweight guide wheel 40.

[0058] Optionally, in a feasible embodiment, in the conveying direction of the hand-pull strip, the counterweight guide wheel 40 is located at the upstream end of the multiple guide wheels 30, and the hand-pull strip can be directly conveyed to the multiple counterweight guide wheels 40 through the counterweight guide wheel 40, so that the hand-pull strips located on the multiple guide wheels 30 can be tightened by the counterweight guide wheel 40, and there is no need to set other structures at the input end of the conveying component 3 to limit the hand-pull strips, thereby making the structure of the hand-pull strip conveying mechanism 1 of this bag making machine simpler; that is, the material roll of the hand-pull strip can be directly installed on the counterweight guide wheel 40.

[0059] Optionally, in another feasible embodiment, in the conveying direction of the hand strap, the counterweight guide wheel 40 is located between two adjacent guide wheels 30 among the multiple guide wheels 30; at this time, the hand strap located at the input end of the conveying component 3 needs to be limited; and through this setting, when the hand strap is tightened by the counterweight guide wheel 40, the moving distance of the moving part 41 can be reduced.

[0060] The structure and arrangement of the moving component 41 are further explained below.

[0061] First, the arrangement of the moving part 41 in one embodiment is explained. Figure 1 and Figure 3 As shown, in order to make the counterweight guide wheel 40 reliably and continuously tighten the hand strap, a moving component 41 is provided including a slider 410 and a counterweight block 411 detachably fixed to one side of the slider 410; wherein, the frame 2 is provided with a height direction of the frame 2 (see Figure 1 and Figure 2 The slide rail 20 extends in the direction indicated by the arrow L in the figure. The slider 410 is slidably connected to the slide rail 20. The counterweight 411 is fixed to the end of the slider 410 away from the slide rail 20. In addition, the counterweight guide wheel 40 is rotatably disposed on one side of the slider 410. It should be understood that the counterweight guide wheel 40 can be rotatably connected to the slider 410 and can also be rotatably connected to the counterweight 411.

[0062] Specifically, during the transportation of the hand strap, the counterweight block 411 drives the slider 410 to move horizontally along the slide rail 20 (that is, move downward in the height direction) under the action of gravity, so that the counterweight guide wheel 40 tightens the hand strap. During this process, the counterweight block 411, the slider 410 and the counterweight guide wheel 40 jointly apply gravity to the hand strap, increasing the tensioning force of the hand strap, so that the hand strap can be transported more reliably and the position will not be shifted.

[0063] In addition, a counterweight block 411 is detachably fixed to one side of the slider 410, so that the pressing force of the counterweight guide wheel 40 on the handrail can be changed by replacing the counterweight blocks 411 of different weights, thereby adapting to handrails of different sizes and different materials, and reducing the risk of the handrail being broken due to excessive tension applied to the handrail by the counterweight guide wheel 40.

[0064] Optionally, in a feasible implementation, as Figure 3 As shown, the movable component 41 also includes a clamping portion; wherein, the clamping portion includes a pressure plate 412, which is located on the other side of the slide rail 20 relative to the slider 410, and the pressure plate 412 moves toward the slide rail 20; and when the hand strap stops conveying, the pressure plate 412 is pressed against the other side surface of the slide rail 20 and fixes the slider 410 relative to the frame 2.

[0065] By setting up a clamping portion, when the hand strap size needs to be changed and the hand strap needs to be replaced, or when the hand strap stops conveying during maintenance of the machine, the slider 410 is subjected to its own weight and the weight of the counterweight block 411 and the counterweight guide wheel 40, which will cause the tensioning assembly 4 to move downward in the height direction as a whole. By setting up a pressure plate 412 to press on the other side of the slider 410, the slider 410 can be fixed relative to the frame 2, thereby avoiding the problem of the slider 410 being moved downward in the height direction due to its own weight and the weight of the counterweight block 411 and the counterweight guide wheel 40. As a result, the tensioning assembly 4 as a whole will not move downward in the height direction and collide with the frame 2 to cause damage to its own structure without the hand strap being tightened.

[0066] Optionally, in a feasible implementation, as Figure 3 As shown, the pressing portion further includes a mounting seat 413 and a driving cylinder 414 fixedly mounted on the mounting seat 413 and with a driving end extending toward the slide rail 20 , and the pressing plate 412 is fixed to the driving end of the driving cylinder 414 .

[0067] Specifically, when the hand strap stops being conveyed, the driving end of the driving cylinder 414 drives the pressing plate 412 to press against the other side surface of the slide rail 20. By driving the pressing plate 412 to press against the other side surface of the slide rail 20 by the driving cylinder 414, there is no need to fix the pressing plate 412 by manual installation. On the one hand, it is convenient to fix the slider 410 relative to the slide rail 20, thereby making the hand strap conveying mechanism 1 of the bag making machine more convenient to use.

[0068] More specifically, when the size of the handrail needs to be replaced, or when the handrail stops conveying during maintenance of the machine, the driving end of the driving cylinder 414 drives the pressure plate 412 to move toward the other side surface of the slide rail 20, and then presses the pressure plate 412 against the other side surface of the slide rail 20, so that the pressure plate 412 and the driving cylinder 414 are fixed relative to the slide rail 20, and the slider 410 is also fixed relative to the frame 2, thereby avoiding the slider 410 from moving downward in the height direction due to its own gravity and the gravity of the counterweight block 411 and the counterweight guide wheel 40, thereby causing damage to the overall structure of the tensioning assembly 4.

[0069] Specifically, the structure and arrangement of the mounting base 413 are not limited.

[0070] Optionally, in a feasible implementation, as Figure 3 As shown, the mounting seat 413 includes a pair of mounting plates 415 fixed on both sides of the slider 410, and a fixed plate 417 away from the end of one side of the slider 410. The driving cylinder 414 is fixed on the fixed plate 417 and is located between the pair of mounting plates 415, and the end of the pair of mounting plates 415 away from the slider 410 is fixedly connected to the fixed plate 417; by arranging the driving cylinder 414 between the pair of mounting plates 415, the driving cylinder 414 can be protected, thereby reducing the risk of the driving cylinder 414 being damaged during the use or transportation of such a conveying mechanism.

[0071] Specifically, by providing a pair of mounting plates 415, the driving end of the driving cylinder 414 drives the pressure plate 412 to move toward the other side surface of the slide rail 20, and then after the pressure plate 412 is pressed against the other side surface of the slide rail 20, the driving cylinder 414, the pressure plate 412, and the fixed plate 417 are all fixed relative to the frame 2. Since the fixed plate 417 is fixedly connected to the slider 410 through the pair of mounting plates 415, when the fixed plate 417 is fixed, the slider 410 can be synchronously linked to be fixed relative to the slide rail 20. Therefore, the hand-pull conveying mechanism 1 of this bag making machine also has the advantage of high synchronization. Of course, it should be understood that the mounting seat 413 can also be other types of structures, such as the mounting seat 413 including a pair of connecting plates fixed to both sides of the slider 410, and a fixed block away from the end of one side of the slider 410.

[0072] Furthermore, the pressing portion further includes multiple elastic members positioned between the opposing surfaces of the pressing plate 412 and the fixing plate 417. These elastic members are coil springs 416 extending along the moving direction of the pressing portion, with their ends fixed to the opposing surfaces of the pressing plate 412 and the fixing plate 417, respectively. Furthermore, the multiple coil springs 416 are evenly distributed around the circumference of the pressing plate 412. It should be understood that the number of the multiple elastic members is not limited and can be 2, 3, 5, etc. Of course, the corresponding number of the multiple coil springs 416 is consistent with the number of the multiple elastic members, which can be 2, 3, 5, etc.

[0073] Specifically, by arranging multiple coil springs 416 evenly distributed on the circumference of the pressure plate 412, the driving cylinder 414 works. When the driving end of the driving cylinder 414 retracts, the coil spring 416 is squeezed by the pressure plate 412. At this time, the slider 410 can move relative to the frame 2 in the height direction. At this time, the coil spring 416 is in a compressed state. When the pressure plate 412 needs to be pressed against the other side surface of the slide rail 20, the driving end of the driving cylinder 414 drives the pressure plate 412 to move toward the other side surface of the slide rail 20, so that the pressure plate 412 is pressed and fits the other side surface of the slide rail 20. At this time, multiple coil springs 416 also apply a pre-tightening force to the pressure plate 412, so that the pressure plate 412 is more reliably fit to the other side surface of the slide rail 20; and even if the driving cylinder 414 is damaged or does not work, the pressure plate 412 can be pressed against the other side surface of the slide rail 20 by the elastic force of the coil spring 416, thereby ensuring the reliability of the slider 410 when it is fixed relative to the slide rail 20.

[0074] Optionally, in a feasible embodiment, in order to prevent the pressure plate 412 and the other side surface of the slide rail 20 from sliding relative to the other side surface of the slide rail 20 under the action of gravity after the pressure plate 412 and the other side surface of the slide rail 20 are combined with each other, the pressure plate 412 and the other side surface of the slide rail 20 are respectively formed with pressing teeth that are adapted to each other; wherein, when the pressure plate 412 is pressed against the other side surface of the slide rail 20, the respective pressing teeth engage with each other.

[0075] Specifically, when the pressure plate 412 is pressed against the other side surface of the slide rail 20, the pressing teeth of the pressure plate 412 and the other side surface of the slide rail 20 engage with each other, thereby increasing the friction between the pressure plate 412 and the slide rail 20, and reducing the risk of the pressure plate 412 sliding again relative to the slide rail 20 when the pressure plate 412 is pressed against the other side surface of the slide rail 20, thereby ensuring that the tensioning assembly 4 is reliably fixed on the slide rail 20 as a whole, and will not fall under the action of gravity and cause damage to its own structure.

[0076] In summary, in order to protect the hand strap conveying mechanism 1 of the bag making machine during use, the risk of collision between the tensioning assembly 4 and the bottom or top of the frame 2 can be reduced when moving upward or downward in the height direction.

[0077] Furthermore, if Figure 1 and 2 As shown, the hand strap conveying mechanism 1 of this bag-making machine also includes a lower protection portion 22 and an upper protection portion 21. The upper protection portion 21 is located above the movable member 41 and includes an elastic protection protrusion extending in the height direction toward the top of the movable member 41. It should be understood that the upper protection portion 21 should be located at the upper end of the slide rail 20 in the height direction and fixedly mounted on the frame 2 to prevent the slider 410 from sliding off the upper end of the slide rail 20.

[0078] Furthermore, the lower protection portion 22 is provided at the lower end of the frame 2 and is located directly below the moving component 41 in the height direction, and has an elastic protection protrusion facing the moving component 41 .

[0079] Specifically, by providing the upper protection portion 21 and the lower protection portion 22 , the problem of the movable component 41 being damaged when the movable component 41 collides with the upper end or the lower end of the frame 2 when moving in the height direction is avoided.

[0080] More specifically, the structure of the elastic protective protrusion is not limited, for example, it can be a telescopic elastic push head, or a rubber column, etc., which is not limited in this embodiment.

[0081] The structure and arrangement of the moving component 41 in another embodiment will be described below.

[0082] In another embodiment, the movable component 41 includes a connecting rod and a counterweight 411 detachably fixed to the connecting rod; wherein one end of the connecting rod is rotatably disposed on the frame 2, and the counterweight 411 is fixed to the other end of the connecting rod away from the frame 2.

[0083] In addition, the counterweight guide wheel 40 is rotatably arranged on one side of the counterweight block 411; wherein, during the transportation of the hand strap, the counterweight block 411 drives the connecting rod to rotate freely relative to the frame 2 under the action of gravity, and the counterweight guide wheel 40 tightens the hand strap.

[0084] Specifically, when the hand strap conveying mechanism 1 is in the process of conveying the hand strap, even if the hand strap tends to relax during the conveying process due to the slowdown in the forming speed of the hand strap forming device of the bag making machine or the shutdown of the machine, since one end of the connecting rod is rotatably connected to the frame 2, when the hand strap tends to relax and does not tighten the counterweight guide wheel 40, the counterweight guide wheel 40 will swing downward relative to the frame 2 through the connecting rod, thereby causing the counterweight guide wheel 40 to tighten the hand strap again, and then the hand strap wrapped around multiple guide wheels 30 and the counterweight guide wheel 40 will be tightened by the counterweight guide wheel 40 in time and continue to maintain the tightened state, avoiding the problem of the hand strap position being offset and falling off from the counterweight guide wheel 40 or multiple guide wheels 30 due to the relaxation of the hand strap.

[0085] More specifically, a counterweight block 411 is provided at the other end of the guide rod, and the counterweight block 411 and the counterweight guide wheel 40 can jointly apply tension to the hand strap, thereby increasing the tension on the wrist strap, so that when the hand strap has a tendency to relax and will not tighten the counterweight guide wheel 40, it can be tightened in time.

[0086] Optionally, in one feasible embodiment, the movable member 41 further includes a locking assembly; wherein the locking assembly comprises a locking recess provided on the frame 2 and opposite the connecting rod, the locking recess being recessed inwardly toward the surface of the connecting rod and having an elastic protective layer. Furthermore, when the hand strap stops conveying, the connecting rod is free to hang down and engage in the locking recess.

[0087] Specifically, by setting up a locking assembly, when the hand pull bar is replaced or the hand pull bar is used up, there is no need to tighten the hand pull bar again through the counterweight guide wheel 40. By allowing the connecting rod to hang freely and clamp it in the locking recess, the counterweight guide wheel 40 will not swing relative to the frame 2, thereby facilitating the replacement of the hand pull bar.

[0088] In addition, an elastic protective layer is provided in the locking recess, so that when the connecting rod moves and is retained in the locking recess, the connecting rod is prevented from directly colliding with the locking recess, thereby preventing mechanical damage.

[0089] It should be understood that the locking assembly can be a locking block, a locking seat, etc. fixedly arranged on the frame, and this embodiment does not limit this.

[0090] The above describes the implementation of the present invention by means of specific specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide an in-depth understanding of the present invention, the above description will contain many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0091] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0092] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the utility model.

[0093] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0094] In the description of this embodiment, it should be noted that, unless otherwise specified or limited, the terms "disposed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this embodiment based on specific circumstances.

Claims

1. A hand strap conveying mechanism for a bag making machine, characterized in that: The machine comprises a frame, a conveying assembly mounted on the frame, and a tensioning assembly mounted on the frame and located on an input path of the conveying assembly; The conveying assembly includes a plurality of guide wheels sequentially mounted on the frame along the conveying direction of the hand strap, and the tensioning assembly includes a moving part movably arranged on the frame relative to the frame, and a counterweight guide wheel rotatably connected to the moving part, wherein the counterweight guide wheel and the plurality of guide wheels are located on the same side of the frame; wherein, During the conveying process of the hand strap, the hand strap is sequentially wound around the plurality of guide wheels and the counterweight guide wheel along the conveying direction, and the movable component can move relative to the frame and tighten the hand strap through the counterweight guide wheel.

2. The hand strap conveying mechanism of the bag making machine according to claim 1, characterized in that: in, In the conveying direction of the hand strap, the counterweight guide wheel is located at the upstream end of the plurality of guide wheels.

3. The hand strap conveying mechanism of the bag making machine according to claim 2, characterized in that: The moving part includes a slider and a detachable counterweight fixed to one side of the slider; wherein, The frame is provided with a slide rail extending in the height direction of the frame, the slider is slidably connected to the slide rail, and the counterweight is fixed to one end of the slider away from the slide rail; and The counterweight guide wheel is rotatably arranged on one side of the slider; wherein, During the conveying process of the hand strap, the counterweight block drives the slider to translate along the slide rail under the action of gravity, and the counterweight guide wheel tightens the hand strap.

4. The hand strap conveying mechanism of the bag making machine according to claim 3, characterized in that: The moving component further includes a pressing portion; wherein, The pressing portion includes a pressing plate movably arranged on the other side of the slide rail relative to the slider; and When the hand strap stops being transported, the pressing plate is pressed against the other side surface of the slide rail to fix the slider relative to the frame.

5. The hand strap conveying mechanism of the bag making machine according to claim 4, characterized in that: The pressing portion further includes a mounting seat, and a driving cylinder fixedly mounted on the mounting seat and with a driving end extending toward the slide rail, the pressing plate being fixed to the driving end of the driving cylinder; and When the hand strap stops being transported, the driving end of the driving cylinder drives the pressing plate to press against the other side surface of the slide rail.

6. The hand strap conveying mechanism of the bag making machine according to claim 5, characterized in that: The pressure plate and the other side surface of the slide rail are respectively formed with mutually adapted pressing teeth; wherein, When the pressing plate is pressed against the other side surface of the slide rail, the respective pressing teeth mesh with each other.

7. The hand strap conveying mechanism of the bag making machine according to claim 5, characterized in that: The mounting seat includes a pair of mounting plates fixed to both sides of the slider and a fixed plate away from one end of the slider, the driving cylinder is fixed to the fixed plate and is located between the pair of mounting plates; and The pressing portion further includes a plurality of elastic members located between the opposing surfaces of the pressing plate and the fixing plate; wherein, The elastic member is a coil spring extending along the moving direction of the pressing portion, with both ends respectively fixed on the opposite surfaces of the pressing plate and the fixing plate; and a plurality of the coil springs are evenly distributed in the circumferential direction of the pressing plate.

8. The hand strap conveying mechanism of the bag making machine according to any one of claims 3 to 7, characterized in that: It also includes a lower protection part and an upper protection part; wherein, The upper protection portion is located above the moving component and has an elastic protection protrusion extending toward the top of the moving component in the height direction; and The lower protection portion is arranged at the lower end of the frame, is located directly below the moving component in the height direction, and has an elastic protection protrusion facing the moving component.

9. The hand strap conveying mechanism of the bag making machine as claimed in claim 2, characterized in that: The moving part includes a connecting rod and a detachable counterweight fixed on the connecting rod; wherein, One end of the connecting rod is rotatably arranged on the frame, and the counterweight is fixed to the other end of the connecting rod away from the frame; and The counterweight guide wheel is rotatably arranged on one side of the counterweight block; wherein, During the conveying process of the hand strap, the counterweight block drives the connecting rod to freely rotate relative to the frame under the action of gravity, and the counterweight guide wheel tightens the hand strap.

10. The hand strap conveying mechanism of the bag making machine according to claim 9, characterized in that: The moving part also includes a locking assembly; wherein, The locking assembly includes a locking recess provided on the frame and opposite to the connecting rod, wherein the locking recess is recessed inwardly toward the surface of the connecting rod and has an elastic protective layer; and When the hand strap stops being transported, the connecting rod hangs down freely and is locked in the locking recess.

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