Pneumatic tightening device of ratchet wheel binding device

Abstract

The utility model relates to the technical field of binding belt packaging equipment, in particular to a pneumatic tightening device of a ratchet wheel binding device, which comprises a belt feeding assembly, a belt inserting assembly, a transverse moving column and a binding tightening assembly. The binding tightening assembly comprises a swing unit, a ratchet wheel, a clamping base and a fixing air cylinder. The swing unit is fixedly connected with the ratchet wheel, and the ratchet wheel is provided with a through clamping groove in the length direction. One end of the clamping base is hinged to the ratchet wheel, and the other end of the clamping base is connected with an output shaft of a fixed air cylinder which is fixed to the transverse moving column. One end of the binding belt is fixed to the clamping base, after ceramic tiles are stacked, the other end of the binding belt is inserted into the clamping groove through the belt inserting assembly, the swing unit drives the ratchet wheel and the clamping base to swing so as to drive the ratchet wheel to rotate, the fixing air cylinder fixes the height of the clamping base, the swing precision is improved, the binding belt can be wound on the circumferential side of the ratchet wheel conveniently, and the binding belt is tightened for binding and packaging. Automatic binding operation is achieved, the efficiency is higher, and binding of the binding belt is firmer.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of band packing equipment, especially to ratchet binding ware pneumatic tightening device. BACKGROUND

[0002] In the ceramic industry, the tiles are stacked after production and need to be packed and bound. The existing tile packing is manually wound around the tile, and the band is manually tightened for binding and fixing. The binding efficiency is low. UTILITY MODEL CONTENT

[0003] To solve the technical defects in the background art, the utility model aims to provide a ratchet binding ware pneumatic tightening device.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme:

[0005] The ratchet binding ware pneumatic tightening device includes a tape feeding assembly for storing a band roll for binding products, a tape inserting assembly, a horizontal moving column, and a binding tightening assembly for tightening the band. The binding tightening assembly includes a swing unit, a ratchet, a clamping seat, and a fixed cylinder. The swing unit is arranged on one side of the horizontal moving column and is fixedly connected with the ratchet to drive the ratchet to rotate. The ratchet is provided with a through clamping groove along its length direction. The clamping seat is arranged on the other side of the horizontal moving column, one end of the clamping seat is hingedly connected with the ratchet, and the other end of the clamping seat is connected with the output shaft of the fixed cylinder. The fixed cylinder is fixed on the horizontal moving column. One end of the band is fixed on the clamping seat, and the tape inserting assembly is used to press the other end of the band into the clamping groove.

[0006] Through the above technical scheme, one end of the band is fixed on the clamping seat. After the tile stacking is completed, the other end of the band is inserted into the clamping groove of the ratchet by the tape inserting assembly. The swing unit drives the ratchet, the clamping seat, and the swing to drive the ratchet to rotate. The clamping seat can fix one end of the band. The fixed cylinder supports and fixes the height of the clamping seat and the ratchet, improves the swing precision, and facilitates the winding of the band on the circumference of the ratchet. The band on the tile is tightened for binding and packing. The automatic binding operation is more efficient, and the band binding is more secure.

[0007] Further, the swing unit includes a swing cylinder, a support frame, and a swing frame. The support frame is arranged on the horizontal moving column, the output shaft of the swing cylinder is fixed on the support frame, the output shaft of the swing cylinder is connected with one end of the swing frame, the output shaft of the swing cylinder is vertically arranged, and the other end of the swing frame is fixedly connected with the ratchet. The structure is simple, compact, and low in cost.

[0008] Further, the swing unit further comprises two guide rods and a pull seat. One end of the two guide rods penetrates through the support frame and is provided, and the swing cylinder is arranged between the two guide rods. The other end of the two guide rods and the output shaft of the swing cylinder are both connected to one end of the pull seat, and the other end of the pull seat is provided with at least one pull hook which is hingedly connected with the support frame. The pull hook is convenient to install and dismount, and is convenient for the support frame to swing.

[0009] Further, the swing frame comprises a tooth plate and a fixed frame. One end of the fixed frame is sleeved on the ratchet wheel, the fixed frame is provided with a sliding groove, one end of the tooth plate is slidingly arranged in the sliding groove, and the end of the tooth plate close to the ratchet wheel is provided with a first gear. The circumferential side of the outer surface of the ratchet wheel is provided with a second gear, the first gear is engagedly connected with the second gear, the first gear is engagedly connected with the second gear, the first gear is engagedly connected with the second gear, and the ratchet wheel is driven to stably rotate, thereby improving the stability of the tightening of the bandage.

[0010] Further, the height of the end of the sliding groove close to the ratchet wheel is lower than the height of the other end of the sliding groove, so that the tooth plate returns to the initial position under the action of gravity to be engagedly connected with the ratchet wheel, and the ratchet wheel is provided with a space for rotation, thereby improving the working efficiency and saving the cost.

[0011] Further, the binding and tightening assembly further comprises a fixed seat. One end of the fixed seat is connected with the output shaft of the fixed cylinder, and the other end of the fixed seat is hingedly connected with one end of the clamping seat away from the ratchet wheel. The fixed seat is convenient to install and dismount, can fix the axis of the clamping seat to swing, and improves the working efficiency.

[0012] Further, the binding and tightening assembly further comprises two groups of clamping units, and one group of the clamping units is arranged on each side of the clamping seat. The clamping unit comprises a clamping cylinder, a push plate and a limiting block. The clamping cylinder is fixed on the horizontal moving column, and the output shaft of the clamping cylinder is arranged in the same length direction of the horizontal moving column. One side of the push plate is connected with the output shaft of the clamping cylinder, and the other side of the push plate is fixedly connected with the limiting block. The side of the limiting block away from the push plate is provided with a guide inclined surface. The guide inclined surface abuts against the side of the clamping seat away from the horizontal moving column, and the length of the side of the limiting block away from the horizontal moving column is the longest. The clamping unit can support the clamping seat during the up-and-down swinging of the ratchet wheel, so that the amplitude and accuracy of the swinging of the clamping seat around the fixed cylinder can be accurately controlled, and the efficiency of the ratchet wheel to rotate and tighten the bandage is improved.

[0013] Further, the ratchet wheel binding device pneumatic tightening device further comprises a cross beam, one side of the cross beam close to the binding and tightening assembly is provided with the belt feeding assembly, and the other side of the cross beam is provided with the belt inserting assembly. The structure is compact, the installation is convenient, and the cost is saved.

[0014] Further, the inserting belt assembly comprises an inserting belt cylinder, a fixed plate and an inserting piece.

[0015] Further, the inserting belt assembly further comprises a limiting frame and a limiting rod.

[0016] In conclusion, the present application has the following advantages:

[0017] In the present application, one end of the binding belt is fixed on the clamping seat, and after the tile stacking is completed, the other end of the binding belt is inserted into the clamping groove of the ratchet wheel. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic view of one embodiment of the binding belt machine of the present application.

[0019] Figure 2 is a structural schematic view of one embodiment of the ratchet wheel binding device pneumatic tightening device of the present application.

[0020] Figure 3 is a structural schematic view of one embodiment of the ratchet wheel binding device pneumatic tightening device of the present application.

[0021] Figure 4 is a structural schematic view of one embodiment of the ratchet wheel binding device pneumatic tightening device of the present application.

[0022] Figure 5 is a structural schematic view of one embodiment of the ratchet wheel binding device pneumatic tightening device of the present application.

[0023] Figure 6It is the enlarged structure schematic view of one embodiment of the belt inserting assembly of the pneumatic tightening device of the ratchet binding device.

[0024] The reference numerals in the drawings are explained as follows:

[0025] 1, binding machine; 2, belt feeding assembly; 3, belt inserting assembly; 31, belt inserting cylinder; 32, fixed plate; 33, inserting piece; 34, limiting frame; 35, limiting rod; 4, binding tightening assembly; 41, swinging unit; 411, swinging cylinder; 412, support frame; 413, swinging frame; 4131, tooth plate; 4132, fixed frame; 4133, sliding groove; 414, guide rod; 415, pull seat; 416, pull hook; 42, ratchet wheel; 421, clamping groove; 43, clamping seat; 44, fixed cylinder; 45, fixed seat; 46, clamping unit; 461, clamping cylinder; 462, push plate; 463, limiting block; 4631, guide inclined surface; 5, binding belt; 6, horizontal moving column; 7, cross beam. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all the other embodiments obtained by those skilled in the art belong to the scope of protection of the present utility model.

[0027] Those skilled in the art should understand that, in the disclosure of the present utility model, the orientations or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as limiting the present utility model.

[0028] In the description of the present utility model, if there is a word such as "several" or the like, the meaning is one or more, the meaning of multiple is two and above, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number. If the first, second, third are described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0029] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all the other embodiments obtained by those skilled in the art belong to the scope of protection of the present utility model. Figures 1-6 The embodiments of the present utility model will be further described in detail.

[0030] Pneumatic tightening device for ratchet binding, such as Figure 1 , Figure 2 , Figure 3 As shown, it includes a feeding assembly 2 storing a roll of strapping 5 for binding products, a strap insertion assembly 3, a transverse column 6, and a binding tightening assembly 4 for tightening the strapping 5. The binding tightening assembly 4 includes a swing unit 41, a ratchet 42, a retainer 43, and a fixing cylinder 44. The swing unit 41 is located on one side of the transverse column 6 and is fixedly connected to the ratchet 42 to drive the ratchet 42 to rotate. The ratchet 42 has a through groove 421 along its length. The retainer 43 is located on the other side of the transverse column 6. One end of the retainer 43 is hinged to the ratchet 42, and the other end of the retainer 43 is connected to the output shaft of the fixing cylinder 44, which is fixed to the transverse column 6. One end of the strapping 5 is fixed to the retainer 43, and the strap insertion assembly 3 is used to press the other end of the strapping 5 into the groove 421.

[0031] One end of the strap 5 is fixed to the card holder 43. After the tiles are stacked, the strap insertion assembly 3 inserts the other end of the strap 5 into the slot 421 of the ratchet 42. The swing unit 41 drives the ratchet 42 and the card holder 43 to swing and rotate the ratchet 42. The card holder 43 can fix one end of the strap 5. The fixing cylinder 44 supports the card holder 43 and the ratchet 42 and fixes the height of the card holder 43 to improve the swing accuracy, so that the strap 5 can be wrapped around the circumference of the ratchet 42, so that the strap 5 wrapped around the tiles is tightened for binding and packaging. The automated binding operation is more efficient and the strap 5 is more secure.

[0032] In some embodiments, please refer to Figure 2 , Figure 3 , Figure 4 The swing unit 41 includes a swing cylinder 411, a support frame 412, and a swing frame 413. The support frame 412 is mounted on the transverse column 6. The output shaft of the swing cylinder 411 is fixed to the support frame 412. The output shaft of the swing cylinder 411 is connected to one end of the swing frame 413. The output shaft of the swing cylinder 411 is vertically arranged. The other end of the swing frame 413 is fixedly connected to the ratchet 42. The structure is simple, the installation is compact, and the cost is low.

[0033] Specifically, the swinging unit 41 further comprises two guide rods 414 and a pull seat 415. One end of the two guide rods 414 penetrates through the support frame 412, and the swinging cylinder 411 is arranged between the two guide rods 414. The other end of the two guide rods 414 and the output shaft of the swinging cylinder 411 are both connected to one end of the pull seat 415, and the other end of the pull seat 415 is provided with at least one pull hook 416 which is hingedly connected to the support frame 412, so that the support frame 412 can be conveniently installed, disassembled and swung. The two guide rods 414 can ensure that the swinging cylinder 411 drives the pull seat 415 to stably move up and down, and the position of the pull hook 416 on the pull seat 415 remains relatively stable, thereby improving the stability of the push-pull swinging frame 413 and the rotation of the ratchet wheel 42.

[0034] Preferably, the swinging frame 413 comprises a toothed plate 4131 and a fixed frame 4132. One end of the fixed frame 4132 is sleeved on the ratchet wheel 42, the fixed frame 4132 is provided with a sliding groove 4133, one end of the toothed plate 4131 is slidingly arranged in the sliding groove 4133, and the end of the toothed plate 4131 close to the ratchet wheel 42 is provided with a first gear. The circumferential side of the outer surface of the ratchet wheel 42 is provided with a second gear, the first gear is engagedly connected with the second gear, so as to conveniently drive the ratchet wheel 42 to stably rotate, thereby improving the stability of the tightening of the bandage 5. The structure of the first gear and the second gear is not shown in the figure.

[0035] Preferably, the height of one end of the sliding groove 4133 close to the ratchet wheel 42 is lower than the height of the other end of the sliding groove 4133, so as to facilitate the toothed plate 4131 to return to the initial position under the action of gravity to be engagedly connected with the ratchet wheel 42, and also provide a space for the rotation of the ratchet wheel 42, thereby improving the working efficiency and saving the cost.

[0036] In some embodiments, please refer to Figure 2 The binding and tightening assembly 4 further comprises a fixed seat 45. One end of the fixed seat 45 is connected with the output shaft of the fixed cylinder 44, and the other end of the fixed seat 45 is hingedly connected with one end of the clamping seat 43 away from the ratchet wheel 42. The fixed seat 45 can be conveniently installed, disassembled and fixed, and can fix the axis of the swinging of the clamping seat 43, thereby improving the working efficiency.

[0037] In some embodiments, please refer to Figure 2The bundle tightening assembly 4 further comprises two sets of clamping units 46, and each side of the clamping seat 43 is provided with a set of clamping units 46. The clamping unit 46 comprises a clamping cylinder 461, a push plate 462 and a limiting block 463. The clamping cylinder 461 is fixed on the horizontal moving column 6, and the output shaft of the clamping cylinder 461 is arranged in the same length direction of the horizontal moving column 6. One side of the push plate 462 is connected with the output shaft of the clamping cylinder 461, and the other side of the push plate 462 is fixedly connected with the limiting block 463, and the side of the limiting block 463 away from the push plate 462 is provided with a guide inclined surface 4631. The guide inclined surface 4631 abuts against the side of the clamping seat 43 away from the horizontal moving column 6. The length of the side of the limiting block 463 away from the horizontal moving column 6 is the longest. The clamping unit 46 can support the clamping seat 43 in the process of swinging up and down on the ratchet wheel 42, so as to accurately control the swinging amplitude and accuracy of the clamping seat 43 around the fixed cylinder 44, and improve the efficiency of the ratchet wheel 42 rotating to tighten the bundle 5.

[0038] In some embodiments, referring to Figure 1 、 Figure 5 The ratchet bundle pneumatic tightening device further comprises a cross beam 7, one side of the cross beam 7 close to the bundle tightening assembly 4 is provided with the bundle feeding assembly 2, and the other side of the cross beam 7 is provided with the bundle inserting assembly 3, which is compact in structure, convenient to install and cost-saving.

[0039] In some embodiments, referring to Figure 5 、 Figure 6 The bundle inserting assembly 3 comprises a bundle inserting cylinder 31, a fixed plate 32 and an inserting piece 33. The fixed plate 32 is slidingly connected to the cross beam 7 in the height direction, the output shaft of the bundle inserting cylinder 31 is connected to one end of the fixed plate 32, and the inserting piece 33 is arranged on the side of the fixed plate 32 away from the cross beam 7. The inserting piece 33 is arranged corresponding to the clamping groove 421, so as to realize automatic bundle inserting operation and improve the efficiency.

[0040] Preferably, the bundle inserting assembly 3 further comprises a limiting frame 34 and a limiting rod 35. One end of the limiting frame 34 is connected with the other end of the fixed plate 32, and the limiting rod 35 is arranged in the limiting frame 34. The limiting frame 34 is open on the side facing the other end of the bundle 5, and the length of the other end of the limiting frame 34 is greater than the length of the end of the limiting frame 34 close to the bundle inserting cylinder 31. The limiting frame 34 can limit the displacement of the bundle 5, so as to prevent the bundle 5 from being misaligned in the process of bundle inserting, thereby improving the accuracy and efficiency of bundle inserting.

[0041] The working principle of the ratchet bundle pneumatic tightening device will be described in detail below.

[0042] The strap 5 machine 1 is provided with at least one set of ratchet binding pneumatic tightening device. The strap 5 roll is placed on the tape feeding assembly 2, before stacking, the cross beam 7 is moved to the side of the strap 5 machine 1 away from the transverse column 6, one end of the strap 5 is manually pulled from below through the stack frame and wound to the card seat 43, which facilitates the stacking of the ceramic tiles on the strap 5, and the end of the strap 5 is fixed on the card seat 43. The ceramic tiles are stacked on the stack frame one by one, after the stacking is completed, the cross beam 7 is moved above the transverse column 6, and the strap 5 is wound on the upper surface of the ceramic tiles at the same time, at this time, the plug-in sheet 33 is located above the card slot 421.

[0043] Then, the strap inserting operation is carried out. The strap inserting cylinder 31 drives the plug-in sheet 33, the limiting frame 34 and the limiting rod 35 to move down. The limiting rod 35 and the plug-in sheet 33 press the strap 5 down synchronously until the plug-in sheet 33 presses the strap 5 into the card slot 421, and the strap inserting operation is completed. The plug-in sheet 33, the limiting frame 34 and the limiting rod 35 are driven by the strap inserting cylinder 31 to rise to the initial position.

[0044] Finally, the binding and tightening operation is carried out. The swing cylinder 411 drives the pull seat 415 to move up and down repeatedly to drive the swing frame 413 to swing. The other end of the swing frame 413 is engaged to drive the ratchet 42 to rotate. At the same time, under the support of the fixed cylinder 44, the card seat 43 drives the ratchet 42 to reciprocate around the end of the fixed seat 45 hinged to the card seat 43 as the axis. The two sets of clamping cylinders 461 synchronously extend and retract during the swinging of the card seat 43 to make the limiting block 463 always abut against the periphery of the card seat 43, which can ensure the swinging range of the card seat 43 and provide force for the swinging of the card seat 43 and the ratchet 42, improve the working efficiency of the binding and tightening, and complete the tightening operation.

[0045] The embodiments of the specific embodiment are the preferred embodiments of the application, not limited to the protection scope of the application, wherein the same parts are indicated by the same reference numerals. Therefore: any equivalent changes made according to the structure, shape and principle of the application should be covered by the protection scope of the application.

Claims

1. A pneumatic tightening device for a ratchet binder characterized in that, The application relates to a binding tightening assembly for tightening a binding (5) for bundling products, which comprises a feeding assembly (2) for storing a roll of the binding (5), a inserting assembly (3), a transverse moving column (6) and the binding tightening assembly (4); the binding tightening assembly (4) comprises a swing unit (41), a ratchet wheel (42), a clamping seat (43) and a fixed air cylinder (44); the swing unit (41) is arranged on one side of the transverse moving column (6) and is fixedly connected with the ratchet wheel (42) to drive the ratchet wheel (42) to rotate; the ratchet wheel (42) is provided with a clamping groove (421) penetrating along the length direction; the clamping seat (43) is arranged on the other side of the transverse moving column (6) and is hingedly connected with the ratchet wheel (42) at one end; the other end of the clamping seat (43) is connected with the output shaft of the fixed air cylinder (44); the fixed air cylinder (44) is fixed on the transverse moving column (6); one end of the binding (5) is fixed on the clamping seat (43); and the inserting assembly (3) is used for pressing the other end of the binding (5) into the clamping groove (421).

2. A pneumatic tightening device for a ratchet binder as claimed in claim 1, characterised in that, The swing unit (41) comprises a swing air cylinder (411), a supporting frame (412) and a swing frame (413); the supporting frame (412) is arranged on the transverse moving column (6); the output shaft of the swing air cylinder (411) is fixed on the supporting frame (412); the output shaft of the swing air cylinder (411) is connected with one end of the swing frame (413); the output shaft of the swing air cylinder (411) is vertically arranged; and the other end of the swing frame (413) is fixedly connected with the ratchet wheel (42).

3. A pneumatic tightening device for a ratchet binder as defined in claim 2, wherein, The swing unit (41) further comprises two guide rods (414) and a pulling seat (415); one end of each of the two guide rods (414) penetrates through the supporting frame (412) and is arranged; and the swing air cylinder (411) is arranged between the two guide rods (414); the other end of each of the two guide rods (414) and the output shaft of the swing air cylinder (411) are connected with one end of the pulling seat (415); the other end of the pulling seat (415) is provided with at least one pulling hook (416); and the pulling hook (416) is hingedly connected with the supporting frame (412).

4. The pneumatic tightening device for a ratchet binder as claimed in claim 2, wherein, The swing frame (413) comprises a toothed plate (4131) and a fixing frame (4132); one end of the fixing frame (4132) is sleeved on the ratchet wheel (42); the fixing frame (4132) is provided with a sliding groove (4133); one end of the toothed plate (4131) is slidingly arranged in the sliding groove (4133); the end of the toothed plate (4131) close to the ratchet wheel (42) is provided with a first gear; the circumferential side of the outer surface of the ratchet wheel (42) is provided with a second gear; and the first gear is meshingly connected with the second gear.

5. A pneumatic tightening device for a ratchet binder as defined in claim 4, wherein, The height of one end of the sliding groove (4133) close to the ratchet wheel (42) is lower than the height of the other end of the sliding groove (4133).

6. The ratchet binder pneumatic tightening device of claim 1, wherein, The binding tightening assembly (4) further comprises a fixed seat (45); one end of the fixed seat (45) is connected with the output shaft of the fixed cylinder (44), and the other end of the fixed seat (45) is hingedly connected with one end of the clamping seat (43) away from the ratchet wheel (42).

7. The ratchet binder pneumatic tightening device of claim 1, wherein, The binding tightening assembly (4) further comprises two groups of clamping units (46), and one group of the clamping units (46) is arranged on each side of the clamping seat (43); the clamping unit (46) comprises a clamping cylinder (461), a push plate (462) and a limiting block (463); the clamping cylinder (461) is fixed on the transverse moving column (6), and the output shaft of the clamping cylinder (461) is arranged in the same length direction as the transverse moving column (6); one side of the push plate (462) is connected with the output shaft of the clamping cylinder (461), and the other side of the push plate (462) is fixedly connected with the limiting block (463), and the side of the limiting block (463) away from the push plate (462) is provided with a guide inclined surface (4631); the guide inclined surface (4631) abuts against the side of the clamping seat (43) away from the transverse moving column (6); the length of the side of the limiting block (463) away from the transverse moving column (6) is the longest.

8. The ratchet binder pneumatic tightening device of claim 1, wherein, The ratchet binding pneumatic tightening device further comprises a cross beam (7), and the cross beam (7) is arranged in parallel with the transverse moving column (6); one side of the cross beam (7) close to the binding tightening assembly (4) is provided with the belt feeding assembly (2), and the other side of the cross beam (7) is provided with the belt inserting assembly (3).

9. A pneumatic tightening device for a ratchet binder as defined in claim 8, wherein, The belt inserting assembly (3) comprises a belt inserting cylinder (31), a fixed plate (32) and an inserting piece (33); the fixed plate (32) is slidingly connected to the cross beam (7) in the height direction, one end of the belt inserting cylinder (31) is connected to the fixed plate (32), the inserting piece (33) is arranged on the side of the fixed plate (32) away from the cross beam (7), and the inserting piece (33) is arranged in correspondence with the clamping groove (421).

10. A pneumatic tightening device for a ratchet binder as defined in claim 9, wherein, The belt inserting assembly (3) further comprises a limiting frame (34) and a limiting rod (35); one end of the limiting frame (34) is connected with the other end of the fixed plate (32), and the limiting rod (35) is arranged in the limiting frame (34); the other end of the limiting frame (34) is arranged in an open manner facing the other end of the binding belt (5), and the length of the other end of the limiting frame (34) is greater than the length of the end of the limiting frame (34) close to the belt inserting cylinder (31).

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