Automatic hose clamp assembling equipment

Abstract

The utility model discloses an automatic hose clamp assembling device which comprises a machine frame and a conveying mechanism installed on the machine frame, a plurality of tools are arranged on the conveying mechanism, and the tools are used for fixing a clamp belt and circularly conveying the clamp belt along with the conveying mechanism. A strap filling mechanism, a bending mechanism, a rolling mechanism, a screw filling mechanism and a locking mechanism are sequentially arranged in the conveying direction of the conveying mechanism. The strap filling mechanism is used for conveying a strap-shaped strap to the tool; the bending mechanism is used for pre-bending the end part of the strap to a certain radian; the edge rolling mechanism is used for carrying out edge rolling forming on the pre-bent strap; the screw filling mechanism is used for conveying a screw into a hoop shell of the hoop belt subjected to edge rolling forming; full-automatic operation from feeding of parts such as straps and screws to assembly procedures such as feeding, bending, edge rolling, strap locking and screw locking is achieved, manual intervention is not needed, the production efficiency is remarkably improved, and the labor cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the throat collar production technical field, is specific throat collar automatic assembly equipment. BACKGROUND

[0002] Throat collar, also known as clamp or hose clamp, is a kind of mechanical component for fastening and sealing hose and joint connection, is widely used in automobile, ship, engineering machinery, household appliance and each industry.

[0003] At present, the assembly mode of throat collar mainly has two kinds: one is using large integrated automatic assembly machine to carry out automatic production, but the degree of automation of this equipment is lower, the cooperation between each station is not high enough, resulting in low production efficiency, poor product precision;The other is to rely on manual assembly, and this mode has the defects of high labor intensity and low efficiency. SUMMARY

[0004] The utility model aims at providing throat collar automatic assembly equipment to solve the problems in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme: throat collar automatic assembly equipment, including rack and conveying mechanism installed on the rack, the conveying mechanism is provided with a plurality of tooling, the tooling is used to fix the band and circulates with the conveying mechanism and is transported;

[0006] The band filling mechanism, bending mechanism, coiling mechanism, screw filling mechanism and locking mechanism are arranged in sequence along the conveying direction of the conveying mechanism;

[0007] The band filling mechanism is used to convey the band-shaped band to the tooling;

[0008] The bending mechanism is used to pre-bend the end of the band to a certain radian;

[0009] The coiling mechanism is used to coil the pre-bent band into shape;

[0010] The screw filling mechanism is used to convey the screw into the band shell of the coiled band;

[0011] The locking mechanism is used to insert the free end of the coiled band into the band shell and lock the screw, and complete the assembly of the throat collar.

[0012] Further, the tooling includes a base and a pair of clamps respectively arranged on both sides of the base, the top of the base is provided with a mounting port, the two clamps are respectively hingedly assembled on the left and right sides of the mounting port, the middle of the mounting port is provided with a limiting port, the band is placed in the limiting port and the one end of the two clamps close to the limiting port is respectively abutted on the outer end surface of the band, the other end of the two clamps is connected with the spring on the bottom of the mounting port, and the clamp is pressed against the band under the elastic force of the spring.

[0013] Further, the band filling mechanism includes a vibrating feeder, a linear feeder, a connecting frame, a filling cylinder, a demolding cylinder and a tool opening mechanism, the connecting frame is movably provided with a support, the filling cylinder is installed on the connecting frame and drives the support to move along the length direction of the connecting frame, the tool opening mechanism is arranged on the other side of the connecting frame, and the tool conveyed to the feeding side of the conveying mechanism is located between the support and the tool opening mechanism, one end of the support close to the tool opening mechanism is slidably provided with a clamping seat, the output end of the linear feeder is connected with the clamping port on the clamping seat, the demolding cylinder is installed on the support and the piston rod is connected with the clamping seat, so as to drive the clamping seat to move along the width direction of the connecting frame, the tool opening mechanism includes a first cylinder and a pressing block, the first cylinder is installed on the connecting frame, the piston rod of the first cylinder is connected with the pressing block, and the left and right ends of the pressing block are located in front of the side end of the left and right clamps on the tool.

[0014] Further, the bottom end of the support is connected with a righting cylinder, the piston rod of the righting cylinder is connected with a pressing block, and the pressing block is located above the clamping port of the clamping seat, and the pressing block can abut on the upper end of the band to adjust the horizontal state thereof.

[0015] Further, the conveying mechanism includes a first conveying section, a second conveying section and a third conveying section, the first conveying section, the second conveying section and the third conveying section are all provided with a slide adapted to the bottom of the base, the base moves along the slides under the drive of the displacement cylinders, the first conveying section and the second conveying section are arranged on the front side of the rack, the third conveying section is arranged on the rear side of the rack, a first turnover mechanism is arranged on the side of the second conveying section, the first turnover mechanism is used for carrying the tooling and turning it to the rear side to be connected with the third conveying section, a discharging assembly is arranged on the rear side of the rack, the discharging assembly includes a discharging cylinder and a discharging frame, the discharging cylinder is installed on the rack, the discharging frame is assembled on the piston rod of the discharging cylinder, the discharging cylinder drives the discharging frame to press down the left and right clamps on the tooling, so as to open the limiting port, a second turnover mechanism is arranged on the side of the first conveying section, the second turnover mechanism is used for carrying the tooling output by the third conveying section and turning it to the rear side to be connected with the first conveying section.

[0016] Further, the front end face of the first conveying section is provided with the slide, the upper end face of the second conveying section is provided with the slide, the third turnover mechanism is connected between the first conveying section and the second conveying section, the third turnover mechanism is used for carrying the workpiece output by the first conveying section and turning over the workpiece to the rear side to be connected with the second conveying section, the band filling mechanism, the bending mechanism and the rolling mechanism are sequentially arranged on the first conveying section, and the screw filling mechanism and the locking mechanism are sequentially arranged on the second conveying section.

[0017] Further, the bending mechanism comprises a jig with a certain arc surface, a bending piece and a driving assembly, the driving assembly is used for driving the bending piece to freely move on the plane, the bending piece is moved to contact the flat band on the workpiece under the driving of the driving mechanism and continues to move to press the band on the arc surface of the jig, so as to form the bending.

[0018] Further, the screw filling mechanism comprises a feeding assembly, a feeding assembly and a screw tightening mechanism, the feeding assembly arranges and conveys each screw in the feeding assembly to the side of the feeding assembly, so that the feeding assembly clamps the screw and sends the screw to the screw tightening mechanism and the band shell, and aligns the band shell, and the screw tightening mechanism locks the screw into the band shell.

[0019] Further, the locking mechanism comprises locking assemblies and screw locking assemblies arranged on the two sides of the workpiece respectively, the two locking assemblies are aligned on the two sides of the band formed by rolling, and are used for pushing the band to make the free end of the band inserted into the band shell, and the screw locking assembly is used for tightening the screw after the band is inserted into the band shell.

[0020] Further, the specific structure of each mechanism of the conveying mechanism, the bending mechanism, the rolling mechanism, the screw filling mechanism and the locking mechanism can refer to other application files of the applicant.

[0021] Compared with the prior art, the utility model has the advantages that:

[0022] 1. High degree of automation: the feeding of parts such as the band and the screw, the automatic operation of the assembly processes such as feeding, bending, rolling, band locking and screw locking are realized, manual intervention is not needed, the production efficiency is significantly improved, and the labor cost is reduced.

[0023] 2. Fast assembly speed: the mechanisms are coordinated and the action is accurate and rapid, the assembly time of a single collar can be greatly shortened, the production efficiency is improved, and the conveying mechanism is driven by multiple displacement cylinders, so that the workpiece and the conveying sections are seamlessly connected, and the production rhythm of the collar is accelerated.

[0024] 3. Improve the utilization of equipment: the degree of automation of the equipment is high, can realize continuous production, reduces the idle time of equipment, improves the utilization of equipment, avoids the error and instability brought by manual operation, makes the quality of each grommet product can maintain high consistency. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structure schematic view of the grommet automatic assembly equipment of the utility model

[0026] Figure 2 It is a top view of the grommet automatic assembly equipment of the utility model;

[0027] Figure 3 It is a structure schematic view of the grommet automatic assembly equipment of the utility model;

[0028] Figure 4 It is a bottom view of the grommet automatic assembly equipment of the utility model;

[0029] Figure 5 It is a structure schematic view of the grommet automatic assembly equipment of the utility model;

[0030] Figure 6 It is a structure schematic view of the grommet automatic assembly equipment of the utility model;

[0031] Figure 7 It is a structure schematic view of the grommet automatic assembly equipment of the utility model;

[0032] Figure 8 It is a structure schematic view of the grommet automatic assembly equipment of the utility model.

[0033] In the figure, frame-1, conveying mechanism-2, tooling-3, grommet filling mechanism-4, bending mechanism-5, rounding mechanism-6, screw filling mechanism-7, locking mechanism-8, base-301, clamp-302, mounting port-303, limiting port-304, spring-305, vibration feeding disc-401, linear feeder-402, connecting frame-403, filling cylinder-404, demolding cylinder-405, support-406, clamping seat-407, clamping port-408, first cylinder-409, pressing block-410, righting cylinder-411, pressing block-412, unloading assembly-9, first conveying section-201, second conveying section-202, third conveying section-203, first turnover mechanism-204, second turnover mechanism-205, third turnover mechanism-206, jig-501, bending piece-502, driving assembly-503, locking assembly-801, screw locking assembly-802. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0035] As shown in the drawings, Figures 1 to 8 The throat clamp automatic assembling equipment comprises a rack 1 and a conveying mechanism 2 installed on the rack 1, a plurality of tooling 3 are arranged on the conveying mechanism 2, and the tooling 3 is used for fixing a clamp belt and circulating conveying along with the conveying mechanism 2.

[0036] A clamp belt filling mechanism 4, a bending mechanism 5, a coiling mechanism 6, a screw filling mechanism 7 and a locking mechanism 8 are arranged in sequence along the conveying direction of the conveying mechanism 2.

[0037] The clamp belt filling mechanism 4 is used for conveying a belt-shaped clamp belt to the tooling 3.

[0038] The bending mechanism 5 is used for pre-bending the end portion of the clamp belt to a certain radian.

[0039] The coiling mechanism 6 is used for coiling and forming the pre-bent clamp belt.

[0040] The screw filling mechanism 7 is used for conveying a screw into the clamp shell of the coiled and formed clamp belt.

[0041] The locking mechanism 8 is used for inserting the free end of the coiled and formed clamp belt into the clamp shell and locking the screw, so as to complete the throat clamp assembling.

[0042] In the embodiment, the tooling 3 comprises a base 301 and a pair of clamps 302 arranged on both sides of the base 301 respectively, the top of the base 301 is provided with a mounting hole 303, the two clamps 302 are hingedly assembled on the left and right sides of the mounting hole 303 respectively, the middle of the mounting hole 303 is provided with a limiting hole 304, the clamp belt is arranged in the limiting hole 304 and the one end of the two clamps 302 close to the limiting hole 304 is respectively abutted to the outer end face of the clamp belt on both sides, the other end of the two clamps 302 is connected with the bottom of the mounting hole 303 and is provided with a spring 305, and the clamp 302 is pressed against the clamp belt under the elastic force of the spring 305.

[0043] In the embodiment, the cuff filling mechanism 4 comprises a vibrating feeding tray 401, a linear feeder 402, a connecting frame 403, a filling cylinder 404, a demolding cylinder 405 and a tool 3 opening mechanism. The connecting frame 403 is movably provided with a support 406. The filling cylinder 404 is installed on the connecting frame 403 and drives the support 406 to move along the length direction of the connecting frame 403. The tool 3 opening mechanism is arranged on the other side of the connecting frame 403. The tool 3 conveyed to the feeding side of the conveying mechanism 2 is located between the support 406 and the tool 3 opening mechanism. The end of the support 406 close to the tool 3 opening mechanism is slidably provided with a clamping seat 407. The output end of the linear feeder 402 is connected with a clamping opening 408 on the clamping seat 407. The demolding cylinder 405 is installed on the support 406 and the piston rod is connected with the clamping seat 407, so as to drive the clamping seat 407 to move along the width direction of the connecting frame 403. The tool 3 opening mechanism comprises a first cylinder 409 and a pressing block 410. The first cylinder 409 is installed on the connecting frame 403. The piston rod of the first cylinder 409 is connected with the pressing block 410. The left and right ends of the pressing block 410 are located in front of the side ends of the left and right clamps 302 on the tool 3.

[0044] In the embodiment, the bottom end of the support 406 is connected with a righting cylinder 411. The piston rod of the righting cylinder 411 is connected with a pressing block 412. The pressing block 412 is located above the clamping opening 408 of the clamping seat 407. The pressing block 412 can abut on the upper end of the cuff, so as to adjust the horizontal state of the cuff.

[0045] Firstly, the vibrating feeding tray 401 and the linear feeder 402 work cooperatively to continuously convey the cuff. After the cuff is output from the linear feeder 402, the cuff is first clamped in the clamping opening 408 of the clamping seat 407. Then, the righting cylinder 411 drives the pressing block 412 to press the end of the cuff, so as to keep the cuff in the vertical state. At this time, the first cylinder 409 drives the pressing block 410 to press the clamp 302 on the tool 3, so as to make the clamp 302 rotate outward and open the limiting opening 304. At the same time, the filling cylinder 404 drives the support 406 to approach, so as to push the cuff into the opened limiting opening 304. Then, the first cylinder 409 is reset. The clamp 302 loses the pressure and rotates under the action of the spring 305, so as to clamp the cuff. Finally, the demolding cylinder 405 drives the clamping seat 407 to move to the side, so as to make the clamping opening 408 separate from the cuff. The filling cylinder 404 is also reset, so as to complete the filling of the tool 3.

[0046] In the embodiment, the conveying mechanism 2 comprises a first conveying section 201, a second conveying section 202 and a third conveying section 203, the first conveying section 201, the second conveying section 202 and the third conveying section 203 are provided with slideways matched with the bottom of the base 301, the base 301 moves along the slideways under the driving of displacement air cylinders, the first conveying section 201 and the second conveying section 202 are arranged on the front side of the rack 1, the third conveying section 203 is arranged on the rear side of the rack 1, a first turnover mechanism 204 is arranged on the side of the second conveying section 202, the first turnover mechanism 204 is used for carrying the tooling 3 and turning it to the rear side to be connected with the third conveying section 203, and a discharging assembly 9 is arranged on the rear side of the rack 1, the discharging assembly 9 comprises a discharging cylinder and a discharging rack, the discharging cylinder is installed on the rack 1, the discharging rack is assembled on the piston rod end of the discharging cylinder, the discharging cylinder drives the discharging rack to press down the left and right clamps 302 on the tooling 3, so as to open the limiting opening 304, a second turnover mechanism 205 is arranged on the side of the first conveying section 201, the second turnover mechanism 205 is used for carrying the tooling 3 output by the third conveying section 203 and turning it to the rear side to be connected with the first conveying section 201.

[0047] In the embodiment, the front end surface of the first conveying section 201 is provided with a slideway, the upper end surface of the second conveying section 202 is provided with a slideway, and a third turnover mechanism 206 is arranged between the first conveying section 201 and the second conveying section 202, the third turnover mechanism 206 is used for carrying the tooling 3 output by the first conveying section 201 and turning it to the rear side to be connected with the second conveying section 202, the band filling mechanism 4, the bending mechanism 5 and the coiling mechanism 6 are arranged on the first conveying section 201 in sequence, and the screw filling mechanism 7 and the locking mechanism 8 are arranged on the second conveying section 202 in sequence.

[0048] The slideway of the first conveying path is arranged forwardly, so the tooling 3 in the first conveying path is also arranged forwardly, thereby facilitating the band to be filled into the tooling 3 from the side, and in the subsequent bending and coiling processes, the locking head part of the clamped band on the tooling 3 is perpendicular to the coiling part, which helps to keep the round transition at the connection between the locking head and the band, so that the roundness of the coiled band is higher; after the coiling is completed, the third turnover mechanism 206 turns the tooling 3 upwardly, and then the tooling 3 is pushed into the second conveying path, at this time, the locking head part of the band is in a horizontal state, thereby facilitating the insertion of the band and the filling and locking work of the screw.

[0049] In the embodiment, the bending mechanism 5 comprises a jig 501 with a certain arc on the surface, a bending piece 502 and a driving assembly 503, the driving assembly 503 is used for driving the bending piece 502 to move freely on the plane, the bending piece 502 moves to contact the straight band on the tooling 3 under the driving of the driving mechanism, and continues to move to press the band on the arc surface of the jig 501, thereby forming the bending.

[0050] In the embodiment, the screw filling mechanism 7 comprises a feeding assembly, a feeding assembly and a screw tightening mechanism. The feeding assembly arranges and transports the screws in it to the side of the feeding assembly, so that the feeding assembly clamps the screws and sends them to the screw tightening mechanism and the hoop shell and aligns the hoop shell, and the screw tightening mechanism locks the screws into the hoop shell.

[0051] In the embodiment, the locking mechanism 8 comprises locking assemblies 801 and screw locking assemblies 802 arranged on both sides of the tool 3, respectively. The two locking assemblies 801 are aligned on both sides of the hoop strip formed by the bending and forming, and are used to push the hoop strip to insert the free end of the hoop strip into the hoop shell. The screw locking assembly 802 is used to tighten the screw after the hoop strip is inserted into the hoop shell.

[0052] The working principle of the embodiment is as follows:

[0053] 1. Hoop strip filling: The hoop strip is arranged and transported to the hoop strip filling mechanism 4 through the vibrating feeding disc 401 and the linear feeder 402. The hoop strip filling mechanism 4 accurately sends the hoop strip into the tool 3.

[0054] 2. Bending forming: The tool 3 is transported on the conveying mechanism 2, and the bending forming is carried out at the bending station of the conveying path. The bending member 502 is in contact with the hoop strip under the drive of the driving assembly 503 and presses the hoop strip on the surface of the jig 501. The originally flat hoop strip is gradually bent to fit the curved surface of the jig 501 with the movement and pressing of the bending rod 5. Finally, the flat hoop strip is bent to 90° and can be transported to the next bending process.

[0055] 3. Bending forming: The bending hoop strip is bent into a ring shape by the bending mechanism 6. Since the collar is pre-bent, the efficiency and accuracy of the bending process are significantly improved, and the bending roundness is guaranteed.

[0056] 4. Screw filling: The screws are automatically arranged and transported to the screw filling mechanism 7 by the vibrating disc or other feeding mechanism. The screw filling mechanism 7 accurately inserts the screws into the reserved holes in the hoop shell of the bent hoop strip.

[0057] 5. Hoop strip locking: The free end of the hoop strip is pushed into the hoop shell by the movement of the locking assemblies 801 on both sides of the hoop strip, and the screw is automatically tightened under the drive of the screw locking assembly 802, realizing the automatic threading and locking of the collar and completing the final assembly of the collar.

[0058] 6. Finished product output: The assembled collar is transported to the rear side of the rack 1 by the first turnover mechanism 204, and the tool 3 is opened by the unloading assembly 9, so that the collar is automatically output.

[0059] Although the utility model has been explained in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A device for automatic assembly of a laryngeal cuff, characterized in that: The utility model provides a kind of hoop assembly machine, including rack and conveying mechanism mounted on rack, and a plurality of toolings are arranged on conveying mechanism, and the tooling is used to fix hoop and circulate with conveying mechanism; A hoop filling mechanism, a bending mechanism, a coiling mechanism, a screw filling mechanism and a locking mechanism are arranged along the conveying direction of the conveying mechanism in sequence; The hoop filling mechanism is used to convey the band-shaped hoop to the tooling; The bending mechanism is used to pre-bend the end of the hoop to a certain radian; The coiling mechanism is used to coil the pre-bent hoop into shape; The screw filling mechanism is used to convey the screw into the hoop shell of the coiled and shaped hoop; The locking mechanism is used to insert the free end of the coiled and shaped hoop into the hoop shell and lock the screw, completing the assembly of the collar.

2. The device of claim 1, wherein: The tooling includes a base and a pair of clamps respectively arranged on both sides of the base, a mounting opening is formed at the top of the base, the two clamps are respectively hingedly assembled on the left and right sides of the mounting opening, a limiting opening is formed in the middle of the mounting opening, the hoop is placed in the limiting opening and the outer end surfaces of the hoop on both sides are respectively abutted by one end of the two clamps close to the limiting opening, the other end of the two clamps is connected with the bottom of the mounting opening through a spring, and the clamps press the hoop under the elastic force of the spring.

3. The device of claim 2, wherein: The hoop filling mechanism includes a vibrating feeder, a linear feeder, a connecting frame, a filling cylinder, a demolding cylinder and a tool opening mechanism, a support is movably arranged on the connecting frame, the filling cylinder is installed on the connecting frame and drives the support to move along the length direction of the connecting frame, the tool opening mechanism is arranged on the other side of the connecting frame, and the tool conveyed to the feeding side of the conveying mechanism is located between the support and the tool opening mechanism, a clamping seat is slidably arranged at one end of the support close to the tool opening mechanism, the output end of the linear feeder is butt jointed with the clamping opening on the clamping seat, the demolding cylinder is installed on the support and the piston rod is connected with the clamping seat, so as to drive the clamping seat to move along the width direction of the connecting frame, the tool opening mechanism includes a first cylinder and a pressing block, the first cylinder is installed on the connecting frame, the piston rod of the first cylinder is connected with the pressing block at the end, and the left and right ends of the pressing block are located in front of the side ends of the left and right clamps on the tool.

4. The device of claim 3, wherein: The bottom end of the support is connected with a righting cylinder, the piston rod of the righting cylinder is connected with a pressing block, and the pressing block is located above the clamping opening of the clamping seat, and the pressing block can abut on the upper end of the hoop to adjust the horizontal state.

5. The device of claim 2, wherein: The conveying mechanism comprises a first conveying section, a second conveying section and a third conveying section, each of which is provided with a slide adapted to the bottom box of the base, the base is driven by a plurality of displacement cylinders to move along the slides, the first conveying section and the second conveying section are arranged on the front side of the rack, the third conveying section is arranged on the rear side of the rack, a first turnover mechanism is arranged on the side of the second conveying section, the first turnover mechanism is used to carry the tooling and turn it to the rear side to be connected with the third conveying section, a discharging assembly is arranged on the rear side of the rack, the discharging assembly comprises a discharging cylinder and a discharging rack, the discharging cylinder is installed on the rack, the discharging rack is assembled on the end of the piston rod of the discharging cylinder, the discharging cylinder drives the discharging rack to press down the left and right clamps on the tooling, so as to open the limiting port, a second turnover mechanism is arranged on the side of the first conveying section, the second turnover mechanism is used to carry the tooling output by the third conveying section and turn it to the rear side to be connected with the first conveying section.

6. The device of claim 5, wherein: The front end face of the first conveying section is provided with the slide, the upper end face of the second conveying section is provided with the slide, the first conveying section and the second conveying section are connected by a third turnover mechanism, the third turnover mechanism is used to carry the tooling output by the first conveying section and turn it to the rear side to be connected with the second conveying section, the band filling mechanism, the bending mechanism and the coiling mechanism are arranged in the first conveying section in sequence, and the screw filling mechanism and the locking mechanism are arranged in the second conveying section in sequence.

7. The device of claim 1, wherein: The bending mechanism comprises a jig with a certain arc on the surface, a bending piece and a driving assembly, the driving assembly is used to drive the bending piece to move freely on the plane, the bending piece is driven by the driving mechanism to move to contact the flat band on the tooling and continue to move to press the band on the arc surface of the jig to form a bend.

8. The device of claim 1, wherein: The screw filling mechanism comprises a feeding assembly, a feeding assembly and a screw tightening mechanism, the feeding assembly arranges the screws in it to be conveyed to the side of the feeding assembly, so that the feeding assembly clamps the screws and sends them to the screw tightening mechanism and the hoop shell, and aligns the hoop shell, and the screw tightening mechanism locks the screws into the hoop shell.

9. The device of claim 1, wherein: The locking mechanism comprises locking assemblies and screw locking assemblies arranged on both sides of the tooling, respectively, the two locking assemblies are aligned on both sides of the coiled band, used to push the band to make the free end of the band inserted into the hoop shell, and the screw locking assembly is used to tighten the screw after the band is inserted into the hoop shell.

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