A semi-automatic carton sticking machine for carton production

Abstract

The present application relates to carton production technical field, especially to a kind of semi-automatic carton sticking machine for carton production.The technical problem to be solved is that paperboard gluing part and paperboard have recess, recess glue content is too high, paperboard is soft, excess glue is extruded to paperboard inner wall when sticking, paperboard is bonded skew, paperboard gluing part is scratched when folding paperboard, paperboard gluing part glue reduces to cause paperboard to be not stable, glue is not completely dry when pressing, paperboard is displaced in carrying process, and paperboard is bonded not in specification.The technical scheme is as follows: a kind of semi-automatic carton sticking machine for carton production, including transmission gluing machine and support plate etc.;the processing platform of transmission gluing machine is provided with several support plates.The present application is limited by limiting block and anti-offset block to cooperate, the limiting effect of the paperboard being transported is realized, paperboard is not completely located on support plate when being transported, and folding paperboard cannot be carried out.

Description

Technical Field

[0001] This invention relates to the field of cardboard box production technology, and in particular to a semi-automatic cardboard box gluing machine for cardboard box production. Background Technology

[0002] Cardboard boxes are indispensable in household life. In daily life, we use them to store clothes, books, toys, and other items, and we also use them to pack belongings when moving. The commercial sector is another important area where cardboard boxes are used. During the sales process, good packaging is needed to protect the integrity of goods. Some retailers and supermarkets also use cardboard boxes to load goods, providing customers with a convenient shopping experience. We know that cardboard box production involves a series of processes including pulping, papermaking, printing, paper cutting, molding, and gluing. Among these, gluing, as the most crucial step, still presents some challenges.

[0003] Currently, after the machine applies glue to the cardboard, the glued cardboard needs to be removed manually. Two people need to work together to fold the cardboard into the order of gluing it into the box before feeding it into the machine for pressing. During this process, since a complete carton needs to be made by gluing two separate cardboards together, the manual person needs to first fold the two separate cardboards into an "L" shape, and then the two L-shaped cardboards fit together to form an "U" shape. In this process, the manual person needs to prevent the two halves of the glued "L" shaped cardboard from sticking together, and also prevent the two "L" shaped cardboards from not being properly aligned, making the operation complicated.

[0004] Creases in the glued section of the cardboard cause excessive glue content at the creases, leading to cardboard collapse. Excess glue is also squeezed onto the inner wall of the carton during gluing. When manually gluing and pressing, the glue slips, causing the cardboard to adhere to the excess glue on the inner wall, resulting in misaligned gluing. Manual folding of the cardboard easily scratches the glued section, reducing glue content and making subsequent gluing unstable, affecting carton quality. Furthermore, when cardboard is arranged in the gluing sequence and conveyed to the machine for mechanical pressing, the cardboard shifts during handling before the glue is fully dried, leading to improper gluing and impacting carton production. Summary of the Invention

[0005] To overcome the shortcomings of the cardboard coating section having depressions, excessive glue content in the depressions causing the cardboard to collapse, and excess glue being squeezed onto the inner wall of the carton during gluing, resulting in crooked gluing of the carton, this invention provides a semi-automatic carton gluing machine for carton production.

[0006] The technical solution is as follows: A semi-automatic carton gluing machine for carton production includes a conveyor gluing machine, which consists of a conveyor belt for conveying cartons and a processing platform; a gluing mechanism is installed on the support of the conveyor belt; a baffle is installed on the support of the conveyor belt to allow only two carton panels to pass side by side at a time; it also includes support plates, limit blocks, anti-deviation blocks, protrusions, grippers, folding components, and isolation components; several support plates are installed on the processing platform of the conveyor gluing machine; each support plate is equipped with a limit block; each support plate... Each pallet is equipped with an anti-deviation block; the front support plate is equipped with a protrusion; the processing platform of the conveyor glue applicator has two gripping grooves; each gripping groove on the conveyor glue applicator is slidably connected to a gripper; each support plate is equipped with a folding component; each support plate is equipped with an isolation component. The folding component is used to fold the unfolded rear cardboard and the front cardboard along their own creases, and the isolation component is used to prevent the two sides of the creases of the rear cardboard and the front cardboard from sticking together after folding.

[0007] Optionally, the folding assembly includes a folding drive; each support plate is provided with two micro motors, and the output of each micro motor is connected to a folding drive for folding the cardboard.

[0008] Optionally, the isolation assembly includes an isolation actuator; each support plate is provided with an isolation actuator to prevent the cardboard from sticking together.

[0009] Optionally, it also includes a drive assembly, a scraper, and a scraper; the drive assembly is provided on the transfer glue applicator; a scraper is fixedly connected to the drive assembly; and a scraper is fixedly connected to the drive assembly.

[0010] Optionally, it also includes a glue reservoir; the glue reservoir is located below the glue scraper.

[0011] Optionally, the scraper can be configured in a V-shape.

[0012] Optionally, the scraper is provided with several through grooves.

[0013] Optionally, the scraper is provided with a triangular prism-shaped guide plate, and a pressure sensor is provided on the tip of the scraper.

[0014] Optionally, it also includes a pressing drive, a presser, and a pushing drive; the pressing drive is fixedly connected to the processing platform of the conveying glue applicator, and the pressing drive is composed of a horizontally telescopic electric push rod and a vertically telescopic electric push rod; the presser is fixedly connected to the telescopic part of the vertically telescopic electric push rod of the pressing drive; the pushing drive is fixedly connected to the processing platform of the conveying glue applicator; the pushing drive is an electric push rod.

[0015] Optionally, a U-shaped plate is fixed to the drive component.

[0016] The beneficial effects of the present invention are: the present invention achieves the function of limiting the cardboard being transported by the cooperation of the limiting block and the anti-deviation block, and prevents the cardboard from not being completely located on the support plate during transport, so that the cardboard cannot be folded.

[0017] By using protrusions, folding drive components, and isolation drive components to isolate and fold the cardboard, the cardboard is folded into a gluing state, and the glue on the cardboard is prevented from being scratched when the cardboard is folded into a gluing state, which would result in insufficient glue and unstable carton gluing.

[0018] By using a gripper to grip the cardboard in a folded state, the cardboard can be gripped in its original shape, avoiding incorrect cardboard layout during subsequent gluing and preventing gluing errors.

[0019] By scraping the glue from the recessed areas of the cardboard coating with a scraper and glue scraper, the amount of glue in the recessed areas is reduced, which avoids the cardboard from becoming soft and collapsing due to excessive glue content. Also, when gluing the boxes, excess glue in the recessed areas is squeezed onto the inner wall of the box. When manually gluing and pressing the box, the glue slips and the cardboard sticks to the inner wall of the box where there is excess glue, resulting in the box being skewed.

[0020] By using a pressing drive, a presser, and a pushing drive to press and bond the carton, and then directly push it out after bonding, the system achieves direct pressing of the carton. This prevents the problem of the carton shifting during the process of moving and pressing the carton after bonding, when the glue has not completely dried. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the semi-automatic carton gluing machine for carton production according to the present invention;

[0022] Figure 2 For the present invention Figure 1 Enlarged view of area A in the middle;

[0023] Figure 3 For the present invention Figure 1 Enlarged view of area B in the middle;

[0024] Figure 4 This is a three-dimensional structural diagram of the combination of the gripper, the folding drive, and the isolation drive of the present invention;

[0025] Figure 5 This is a diagram showing the cardboard folding state of the present invention;

[0026] Figure 6 This is a three-dimensional structural diagram of the combination of the gripper and the scraping drive component of the present invention;

[0027] Figure 7 This is a diagram showing the cardboard adhesive application process of the present invention.

[0028] Figure 8 This is a three-dimensional structural diagram of the combined pressing drive, pressing device and pushing drive of the present invention;

[0029] Figure 9 This is a diagram showing the state of the cardboard according to the present invention.

[0030] The markings in the attached diagram are as follows: 1-Transfer glue applicator, 1001-Clamping chute, 2-Support plate, 3-Limiting block, 4-Anti-deviation block, 5-Protrusion, 6-Clamper, 7-Rear cardboard, 7001-Rear pasting part, 8-Front cardboard, 8001-Front pasting part, 101-Folding drive, 102-Isolation drive, 201-Scraping drive, 202-Glue scraper, 203-Glue scraping drive, 20301-Glue scraping chute, 204-Glue reservoir, 205-Glue scraper, 301-Pressing drive, 302-Presser, 303-Pushing drive. Detailed Implementation

[0031] The embodiments of the present invention will be described below with reference to the accompanying drawings.

[0032] Example 1

[0033] like Figure 1 , Figure 4 , Figure 5 and Figure 9 As shown, a semi-automatic carton gluing machine for carton production includes a conveyor gluing machine 1, which consists of a conveyor belt for conveying cartons and a processing platform; a gluing mechanism is provided on the support of the conveyor belt; and a baffle is provided on the support of the conveyor belt to allow only two carton panels to pass side by side at a time.

[0034] It also includes a support plate 2, a limiting block 3, an anti-deviation block 4, a protrusion 5, a gripper 6, a folding assembly, and an isolation assembly; the processing platform of the conveying glue applicator 1 is provided with two support plates 2; each support plate 2 is provided with a limiting block 3; each support plate 2 is provided with an anti-deviation block 4; the front support plate 2 is provided with a protrusion 5; the processing platform of the conveying glue applicator 1 has two gripping grooves 1001; each gripping groove 1001 on the conveying glue applicator 1 is slidably connected to a gripper 6; the gripper 6 is used to fold the glue into a special shape. The rear cardboard 7 and the front cardboard 8 are clamped in their original positions; each support plate 2 is equipped with a folding component; each support plate 2 is equipped with an isolation component; the rear cardboard 7 and the front cardboard 8 are limited by the limiting block 3 and the anti-deviation block 4 on the support plate 2 to prevent the rear cardboard 7 and the front cardboard 8 from being out of the predetermined position; the folding component is used to fold the rear cardboard 7 and the front cardboard 8 in the unfolded state along their own creases; the isolation component is used to prevent the two sides of the creases of the rear cardboard 7 and the front cardboard 8 after folding from sticking together.

[0035] The folding assembly includes a folding drive 101; each support plate 2 is equipped with two micro motors, and the output end of each micro motor is connected to a folding drive 101, which is an electric push rod; the folding drive 101 is controlled by the micro motor to rotate and push from bottom to top and then extend, so that the rear cardboard 7 and the front cardboard 8 are folded inward along the crease respectively.

[0036] The isolation assembly includes an isolation drive 102; each support plate 2 is provided with an isolation drive 102 to prevent the cardboard from sticking together; the isolation drive 102 is an electric push rod; the telescopic part of the isolation drive 102 extends and inserts between the two plates after the rear cardboard 7 and the front cardboard 8 are folded, to isolate the folded rear cardboard 7 from the rear adhesive part 7001, and to isolate the folded front cardboard 8 from the front adhesive part 8001, so as to prevent the rear cardboard 7 and the front cardboard 8 from sticking together directly after being folded, which would cause the rear cardboard 7 and the front cardboard 8 to be not properly arranged and unable to perform normal box gluing work.

[0037] The following describes the operation of a semi-automatic carton gluing machine for carton production: First, two stacks of unfolded carton boards are placed on the conveyor belt of the conveyor gluing machine 1. The conveyor gluing machine 1 is started. When the conveyor belt of the conveyor gluing machine 1 transports the cardboard, the baffle will block the upper layer of carton boards, allowing only the two bottom carton boards side by side to pass through, thus achieving batch feeding. When the two carton boards that have passed through the baffle pass under the gluing mechanism, the gluing mechanism simultaneously applies glue to the rear gluing part 7001 of the rear cardboard 7 and the front gluing part 7001. The front adhesive portion 8001 of the side cardboard 8 is coated with glue. At this time, the limiting blocks 3 on both the left and right support plates 2 are blocking on the left to prevent the cardboard from flying off the support plate 2 during transportation. The anti-deviation blocks 4 on the support plate 2 are located in the area where the two support plates 2 are close to each other, separating the cardboard on the two support plates 2 to prevent the cardboard from overlapping prematurely. Then the rear side cardboard 7 and the front side cardboard 8 are transported onto the front and rear support plates 2. At this time, the front adhesive portion 8001 on the front support plate 2 is located... Near the anti-offset block 4, when the front cardboard 8 is transferred to the support plate 2, it is lifted by the protrusion 5 on the front support plate 2, and the front adhesive part 8001 is in a suspended state. At this time, the drive isolation drive 102 extends towards the cardboard and inserts between the two boards after the rear cardboard 7 and the front cardboard 8 are folded, isolating the rear cardboard 7 and the front cardboard 8 transported to the two support plates 2, preventing the rear cardboard 7 and the front cardboard 8 from being folded and preventing them from being folded back. Since they are directly attached to each other, it affects the subsequent gluing of the two cardboard pieces. At this time, both the rear cardboard 7 and the front cardboard 8 are pressed on the adjacent folding drive 101. The micro motor drives the folding drive 101 to rotate upward, thereby pushing the front cardboard 8 to bend along the crease into an L-shape. Then, the folding drive 101 extends and pushes the front cardboard 8 so that the front cardboard 8 surface away from the front gluing part 8001 is folded along the cardboard crease. At this time, the cardboard is in the following state: Figure 5 As shown in the front cardboard 8, the rear cardboard 7 is simultaneously transferred to the rear support plate 2, and the rear folding drive 101 performs the same operation as described above. At this time, the cardboard is in the following state: Figure 5 As shown in the rear side cardboard 7, after the cardboard is folded, the two grippers 6 are driven to slide from the left side of the conveyor glue applicator 1 along the gripping chute 1001 toward the cardboard. The two grippers 6 respectively hold the rear side cardboard 7 and the front side cardboard 8 as shown in the image. Figure 5 The above workflow, as shown in the diagram, enables the cardboard to be folded according to the gluing process and then clamped back in its original position to prevent the back cardboard 7 and the front cardboard 8 from sticking together.

[0038] Example 2

[0039] Based on Example 1, such as Figures 2-3 and Figures 6-7As shown, it also includes a drive assembly, a scraper 202, and a scraper 205; the conveyor glue applicator 1 is equipped with a drive assembly; the scraper 202 is fixedly connected to the drive assembly; the scraper 205 is fixedly connected to the drive assembly; the drive assembly drives the scraper 202 and the scraper 205 to slide and scrape at the crease where the rear pasting part 7001 connects to the rear cardboard 7 and at the crease where the front pasting part 8001 connects to the front cardboard 8, removing excess glue from the creases of the carton.

[0040] It also includes a glue reservoir 204; the glue reservoir 204 is provided below the glue scraper 205; the glue reservoir 204 stores the glue scraped off by the glue scraper 205 to prevent the scraped glue from flowing into the drive assembly and making the drive assembly unusable.

[0041] The glue scraper 202 is set to V-shape; the glue scraper 202 with V-shape is used to scrape the glue on the concave part of the carton, adapting to the shape of the concave carton and avoiding the failure to completely remove excess glue from the concave part during the scraping process.

[0042] The glue scraper 205 is provided with several through grooves; the glue on the upper surface of the glue scraper 205 after being scraped is guided through the through grooves, so that the glue on the upper surface of the glue scraper 205 flows from the through grooves into the interior of the glue scraper 205, and then from the interior of the glue scraper 205 into the glue reservoir 204, so as to prevent the glue on the upper surface of the glue scraper 205 from solidifying and affecting the scraping effect of the glue scraper 205.

[0043] The scraper 205 is equipped with a triangular prism-shaped guide plate, and a pressure sensor is installed on the tip of the scraper 205. The triangular prism-shaped guide plate guides the glue scraped by the scraper 205 to flow into the glue reservoir 204, preventing the accumulated glue from flowing onto the drive assembly, affecting the operation of the drive assembly, and causing the scraper 205 to stop operating.

[0044] The drive assembly includes a scraping drive 201 and a glue scraping drive 203; the scraping drive 201 is bolted to the conveyor glue applicator 1; the scraping drive 201 consists of a longitudinally telescopic electric push rod and a laterally telescopic electric push rod; the glue scraping drive 203 is slidably connected to the conveyor glue applicator 1, and a glue scraping groove 20301 is provided on the pressing part of the conveyor glue applicator 1. An electric slide rail is provided in the glue scraping groove 20301, and a slider is slidably connected on the electric slide rail. The glue scraping drive 203 is bolted to the slider; the glue scraping drive 203 is an electric push rod; the scraper blade 202 on the scraping drive 201 scrapes off excess glue at the crease where the rear cardboard 7 connects to the rear adhesive part 7001, and the glue scraping drive 203 scrapes off excess glue at the crease where the front cardboard 8 connects to the front adhesive part 8001, so as to prevent excess glue in the recessed area from being squeezed out and pasted to other parts of the cardboard box during the gluing process.

[0045] After the cardboard is folded, the two grippers 6 are driven to slide from the left side of the conveyor glue applicator 1 along the gripping chute 1001 toward the cardboard. The two grippers 6 respectively hold the rear cardboard 7 and the front cardboard 8 in place. Figure 5 The clamping action is shown in the diagram. After clamping is complete, the two grippers 6 are driven to move to the left along the clamping slide 1001, until they reach the position shown in the diagram. Figure 7 At the indicated position, the scraping drive 201 extends to the right, driving the push rod fixed to the scraping drive 201 to extend upward, so that the scraper plate 202 on the scraping drive 201 just scrapes off the excess glue at the crease where the rear cardboard 7 and the rear adhesive part 7001 connect. At the same time, the scraping drive 203 is driven to slide from the leftmost end of the scraping groove 20301 to the right. The scraping drive 203 senses the height of the crease where the front cardboard 8 and the front adhesive part 8001 connect through a pressure sensor set at the tip of the scraper 205. When the scraping drive 203 slides to the right along the scraping groove 20301, the scraper 205 scrapes off the excess glue at the crease where the front cardboard 8 and the front adhesive part 8001 connect. At this time, the glue on the scraper 205 is guided by the triangular prism-shaped guide plate on the scraper 205. The glue scraped off by scraper 205 is guided to flow into the glue reservoir 204. The through groove on scraper 205 guides the glue on the surface of scraper 205 after scraping, so that the glue on the surface of scraper 205 flows from the through groove into the inside of scraper 205, and then from the inside of scraper 205 into the glue reservoir 204. This prevents the glue on the surface of scraper 205 from solidifying and affecting the scraping effect of scraper 205. After scraping is completed, scraper drive 203 is located at the rightmost end of scraper slide 20301. The above process realizes the scraping of the area with excessive glue at the crease of cardboard, avoiding the cardboard from becoming soft and collapsing due to excessive glue content. It also prevents excess glue at the crease from being squeezed to the inner wall of the carton during gluing. When manually gluing and pressing, the glue slips and the cardboard sticks to the excess glue on the inner wall of the carton, causing the carton to be glued crookedly.

[0046] Example 3

[0047] Based on Example 2, such as Figure 1 and Figure 8As shown, it also includes a pressing drive 301, a presser 302, and a pushing drive 303; the pressing drive 301 is fixedly connected to the processing platform of the conveying glue coater 1, and the pressing drive 301 is composed of a horizontally telescopic electric push rod and a vertically telescopic electric push rod; the presser 302 is bolted to the telescopic part of the vertically telescopic electric push rod of the pressing drive 301; the pushing drive 303 is fixedly connected to the processing platform of the conveying glue coater 1; the pushing drive 303 is an electric push rod; by extending and retracting the horizontally telescopic electric push rod of the pressing drive 301 towards the cardboard, the presser 302 is moved to the cardboard pasting position, and the presser 302 is driven by the vertically telescopic electric push rod to press the back cardboard 7 and the front cardboard 8 after pasting and combining to complete the pasting of the carton.

[0048] A U-shaped plate is fixedly attached to the drive component 303; the U-shaped plate fixedly attached to the drive component 303 limits the rear cardboard 7 and the front cardboard 8 which are folded into a specific shape, so as to prevent the carton from shifting when it is pasted.

[0049] After the glue application is completed, the drive unit 303 extends forward, driving the U-shaped plate fixed to it to move towards the cardboard. The U-shaped plate pushes the cardboard to overlap, forming a glued box shape. The drive unit 301 extends downward. When the presser 302 contacts the rear cardboard 7 and the front cardboard 8, the two grippers 6 move to the left, away from the area where the rear cardboard 7 and the front cardboard 8 are located. At this time, the presser 302 continues to press downward, and the rear cardboard 7 and the front cardboard 8 are... Figure 8 As shown, after the presser 302 presses down, the presser 301 rises and the pusher 303 extends forward to push out the glued carton. The above workflow enables the carton to be glued directly after the cardboard is de-glued.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A semi-automatic carton gluing machine for carton production, comprising a conveyor gluing machine (1), the conveyor gluing machine (1) consisting of a conveyor belt for conveying cartons and a processing platform; a gluing mechanism is provided on the support of the conveyor belt; a baffle is provided on the support of the conveyor belt, allowing only two carton panels to pass side by side at a time; characterized in that, It also includes a support plate (2), a limiting block (3), an anti-deviation block (4), a protrusion (5), a gripper (6), a folding assembly, and an isolation assembly; the processing platform of the conveyor glue applicator (1) is provided with several support plates (2); each support plate (2) is provided with a limiting block (3); each support plate (2) is provided with an anti-deviation block (4); the front support plate (2) is provided with a protrusion (5); the processing platform of the conveyor glue applicator (1) has two gripping slides. Slot (1001); Each gripper (6) is slidably connected to each gripping slot (1001) on the conveyor glue applicator (1); Each support plate (2) is provided with a folding component; Each support plate (2) is provided with an isolation component. The folding component is used to fold the unfolded rear cardboard (7) and front cardboard (8) along their own fold lines. The isolation component is used to prevent the back cardboard (7) and front cardboard (8) from sticking together on both sides of their respective fold lines after folding. It also includes a drive assembly, a scraper (202) and a scraper (205); the drive assembly is provided on the transfer glue applicator (1); the scraper (202) is fixedly connected to the drive assembly; the scraper (205) is fixedly connected to the drive assembly. The scraper (202) is set in a V-shape; The back and front cardboard, folded into their unique shapes, are gripped in their original form using a gripper. The drive assembly includes a scraping drive and a glue scraping drive; the scraping drive is bolted to the conveyor glue applicator; the scraping drive consists of a longitudinally telescopic electric push rod and a laterally telescopic electric push rod; the glue scraping drive is slidably connected to the conveyor glue applicator, and a glue scraping groove is provided on the pressing part of the conveyor glue applicator. An electric slide rail is provided in the glue scraping groove, and a slider is slidably connected to the electric slide rail. The glue scraping drive is bolted to the slider; the glue scraping drive is an electric push rod; the scraping drive scrapes off excess glue at the crease where the rear cardboard connects to the rear adhesive part using the scraping blade, and scrapes off excess glue at the crease where the front cardboard connects to the front adhesive part. It also includes a pressing drive (301), a presser (302), and a pushing drive (303); after the glue is applied, the pushing drive extends forward, and the pushing drive drives the U-shaped plate fixed on it to move towards the cardboard. The U-shaped plate pushes the cardboard to overlap and form a glued box shape, and the pressing drive extends downward.

2. The semi-automatic carton gluing machine for carton production according to claim 1, characterized in that, The folding assembly includes a folding drive (101); each support plate (2) is provided with two micro motors, and the output end of each micro motor is connected to a folding drive (101) for folding the cardboard.

3. The semi-automatic carton gluing machine for carton production according to claim 1, characterized in that, The isolation assembly includes an isolation drive (102); each support plate (2) is provided with an isolation drive (102) to prevent the cardboard from sticking together.

4. A semi-automatic carton gluing machine for carton production according to claim 1, characterized in that, It also includes a glue reservoir (204); the glue reservoir (204) is provided below the glue scraper (205).

5. A semi-automatic carton gluing machine for carton production according to claim 1, characterized in that, The glue scraper (205) has several through grooves.

6. A semi-automatic carton gluing machine for carton production according to claim 4, characterized in that, The scraper (205) is provided with a triangular prism guide plate, and a pressure sensor is provided on the tip of the scraper (205).

7. A semi-automatic carton gluing machine for carton production according to claim 6, characterized in that, A pressing drive (301) is fixedly connected to the processing platform of the conveying glue applicator (1). The pressing drive (301) is composed of a horizontally telescopic electric push rod and a vertically telescopic electric push rod. A presser (302) is fixedly connected to the telescopic part of the vertically telescopic electric push rod of the pressing drive (301). A pushing drive (303) is fixedly connected to the processing platform of the conveying glue applicator (1). The pushing drive (303) is an electric push rod.

8. A semi-automatic carton gluing machine for carton production according to claim 7, characterized in that, A U-shaped plate is fixedly attached to the drive component (303).

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