U-shaped gland device

By designing the U-shaped gland device and using the rotary drive device and sliding groove to achieve automatic pressing, the problems of low efficiency and unstable quality of traditional manual pressing are solved, and the pressing efficiency and product quality are improved.

CN222661588UActive Publication Date: 2025-03-25ZHUHAI HEYUE TECH CO LTD
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Patent Information

Application Number
CN202421137308.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-22
Publication Date
2025-03-25
Estimated Expiration
2034-05-22

AI Technical Summary

Technical Problem

During the assembly process of traditional plastic products, especially the ink nozzle cover pressing of the ink cartridge, it relies on manual operation, resulting in inefficiency and improper pressing, affecting product quality and credibility.

Method used

A U-shaped gland device is designed, including a positioning seat, a workpiece temporary storage member and a gland assembly. The toggle and toggle lever are driven by a rotary drive device, and the movable pressing head moves up and down and horizontally in the sliding groove to realize automatic pressing.

Benefits of technology

Improve the pressing efficiency, ensure that each pressing is in place, reduce manual errors, and improve product quality and production efficiency.

✦ Generated by Eureka AI based on patent content.

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    Figure CN222661588U_ABST
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Abstract

The utility model provides a U-shaped gland device which comprises a positioning seat, a workpiece temporary storage piece and a gland assembly, and the workpiece temporary storage piece and the positioning seat are arranged in the preset direction and spaced by a preset distance. The gland assembly comprises a mounting plate, a clamping plate, a shifting piece, a shifting rod, a rotary driving device, a moving piece and a press fitting head, the mounting plate is arranged on one side of the positioning seat and the workpiece temporary storage piece, the clamping plate is arranged on the upper portion of the mounting plate, a sliding groove is formed in the clamping plate, one end of the shifting rod is movably arranged in the sliding groove, and the other end of the shifting rod is connected with the moving piece; the press-fitting head is connected to the lower portion of the moving part, one end of the shifting part is connected with a driving shaft of the rotary driving device, the other end of the shifting part is connected with the shifting rod, the rotary driving device drives the shifting rod to move in the extending direction of the sliding groove through the shifting part, and then the press-fitting head is driven to move vertically and horizontally between the workpiece temporary storage part and the positioning base; the press fitting device has the advantages of being simple in structure, high in press fitting efficiency and good in press fitting quality.
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Description

Technical Field

[0001] The utility model relates to the technical field of press-fitting equipment, in particular to a U-shaped press-cover device. Background Art

[0002] Some plastic products, such as ink cartridges, need to have an ink nozzle cover pressed on the ink nozzle during assembly. The traditional assembly method is manual assembly, which is not only inefficient, but also prone to fatigue after long-term press-fitting, which can easily cause improper press-fitting. If it is detected at the subsequent quality inspection station, it can be reworked. If it is not detected, ink leakage will occur during the subsequent ink filling, which will affect product quality and reputation. Utility Model Content

[0003] The utility model aims to provide a U-shaped pressing cover device with high pressing efficiency and good pressing quality.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a U-shaped pressing cover device, including a positioning seat, a workpiece temporary storage member and a pressing cover assembly, the workpiece temporary storage member and the positioning seat are arranged in a preset direction and spaced by a preset distance; the pressing cover assembly includes a mounting plate, a clamping plate, a toggle member, a toggle rod, a rotary drive device, a moving member and a pressing head, the mounting plate is arranged on one side of the positioning seat and the workpiece temporary storage member, the clamping plate is arranged on the mounting plate, a sliding groove is opened on the clamping plate, one end of the toggle rod is movably arranged in the sliding groove, the end of the sliding groove and the middle thereof are at different height positions in the vertical direction, the two ends of the sliding groove are at different horizontal positions in the horizontal direction, the other end of the toggle rod is connected to the moving member, the pressing head is connected to the lower part of the moving member, one end of the toggle member is connected to the driving shaft of the rotary drive device, the other end of the toggle member is connected to the toggle rod, the rotary drive device drives the toggle rod to move along the extension direction of the sliding groove through the toggle member, and then drives the pressing head to move up and down and horizontally between the workpiece temporary storage member and the positioning seat.

[0005] It can be seen from the above scheme that a positioning seat is provided to position the product to be press-fitted with a cover body, and a workpiece temporary storage member is provided to position the cover body, so that the cover pressing assembly can take the material from the workpiece temporary storage member and press it onto the product; a sliding groove is provided, and when the rotary drive device rotates, the moving member and the pressing head are driven by the toggle member and the toggle rod to move along the extension direction of the sliding groove to achieve horizontal and vertical movement, which has the advantages of simple structure and small size; the utility model can replace manual pressing to ensure that it is pressed into place every time, and has the advantages of high work efficiency and good pressing quality.

[0006] A further solution is that the sliding slot includes a translation section and two lifting sections, the two lifting sections are respectively connected to the two ends of the translation section and extend downward, the lifting section is connected to the translation section, and the distance between the two lifting sections is equal to the preset distance.

[0007] It can be seen from the above scheme that by setting the distance between the two lifting sections equal to the preset distance, the press-fitting head can be accurately aligned with the positioning seat and the workpiece temporary storage part, which facilitates accurate material removal and press-fitting.

[0008] A further solution is that the two lifting sections are respectively arranged correspondingly to the positioning seat and the workpiece temporary storage part.

[0009] A further solution is that an outer plate is also provided on the mounting plate, the outer plate is provided between the moving part and the clamping plate, and an avoidance hole for the toggle rod to pass through is opened in the outer plate corresponding to the sliding groove, and the hole width of the avoidance hole is less than or equal to the groove width of the sliding groove.

[0010] It can be seen from the above scheme that by providing the outer plate, the toggle member is located between the clamping plate and the outer plate, which prevents the toggle member and the toggle rod from accidentally leaving the sliding groove, which is conducive to long-distance transportation of the device.

[0011] A further solution is that the outer plate is provided with a first in-place detection device on both sides thereof, and a first detection plate is provided on both sides of the movable part. When the pressing head moves to the material picking position or the pressing position, the first detection plate can trigger the corresponding first in-place detection device to send an in-place signal.

[0012] A further solution is that a rolling element is sleeved on the toggle rod, the rolling element is arranged in the sliding groove and is adjacent to the groove wall of the sliding groove, and the rolling element can rotate around its own axis.

[0013] It can be seen from the above scheme that by setting the rolling element adjacent to the groove wall of the sliding groove, when the toggle rod drives the rolling element to move along the extension direction of the sliding groove, there is rolling friction between the rolling element and the groove wall of the sliding groove, which is beneficial to reduce the friction between the two, making it convenient for the rolling element to move accurately along the extension direction of the sliding groove and avoiding the situation where the toggle rod shakes along the width direction of the sliding groove.

[0014] A further solution is that a positioning column and at least one protrusion are provided at the lower part of the press-fitting head, and the positioning column protrudes downward from the protrusion.

[0015] It can be seen from the above scheme that the cover body is taken up by providing a positioning column to cooperate with the central hole of the cover body and providing a protrusion to interference fit with the groove of the cover body.

[0016] A further solution is that the pressure cover assembly also includes a transverse guide rail, a transverse slider, a movable seat, a vertical slider and a vertical guide rail. The transverse guide rail is horizontally extended and arranged below the clamping plate, the transverse slider and the vertical slider are respectively arranged on both sides of the movable seat, the transverse slider is cooperatively connected to the transverse guide rail, the vertical guide rail is extended along the up and down directions on the movable member, and the vertical guide rail is cooperatively connected to the vertical slider.

[0017] A further solution is that the workpiece temporary storage member includes a first fixed plate, a top height column and a positioning sleeve, the top height column is arranged on the first fixed plate, a positioning groove is provided on the top wall of the top height column, the positioning sleeve is arranged in the positioning groove and protrudes upward from the positioning groove, a workpiece placement cavity is formed between the outer peripheral wall of the positioning sleeve and the groove wall of the positioning groove, at least one arc groove is provided in the workpiece placement cavity, and a blind hole is provided in the positioning sleeve.

[0018] It can be seen from the above scheme that by providing a workpiece placement cavity for placing the cover body, and by providing an arc groove for limiting the placement direction of the cover body, the groove of the cover body is facilitated to cooperate with the protrusion of the press-fitting head.

[0019] A further solution is that the positioning seat includes a second fixed plate, a first positioning plate and a second positioning plate, the first positioning plate and the second positioning plate are both arranged on the second fixed plate, and a product placement cavity is formed between the first positioning plate and the second positioning plate, and the first positioning plate is respectively provided with a first supporting part and a second supporting part on the upper and lower sides of the product placement cavity; a second in-place detection device is also provided in the product placement cavity, and the second in-place detection device is used to detect whether there is a product in the product placement cavity; the U-shaped cover pressing device also includes a control unit, and the control unit is connected to the second in-place detection device and the rotation drive device, and when the second in-place detection device detects the presence of a product in the product placement cavity, the control unit is triggered to control the rotation drive device to perform material picking and pressing actions.

[0020] It can be seen from the above scheme that by setting up a second in-place detection device, when the product is placed in the product placement cavity, the rotary drive device will be automatically triggered to perform material picking and pressing actions, without the need for additional operations by workers. It has the advantages of simple and convenient operation and time saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of an embodiment of the utility model.

[0022] Figure 2 It is a structural diagram of an embodiment of the utility model without the protective cover.

[0023] Figure 3 It is an exploded view of the gland assembly in the embodiment of the utility model.

[0024] Figure 4 It is a front view of the gland assembly in the embodiment of the utility model.

[0025] Figure 5 yes Figure 4 Cross-sectional view at AA in the middle.

[0026] Figure 6 It is a structural diagram of the gland assembly in the embodiment of the utility model.

[0027] Figure 7It is an exploded view of the workpiece temporary storage member and the cover body in the embodiment of the utility model.

[0028] Figure 8 It is an exploded view of the positioning seat in the embodiment of the utility model.

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0030] See also Figures 1 to 6 The U-shaped capping device provided in this embodiment includes a base plate 1, a positioning seat 2, a workpiece temporary storage member 3, a capping assembly 4 and a protective cover 5.

[0031] The positioning seat 2 and the workpiece temporary storage member 3 are arranged on the base plate 1 along a preset direction and separated by a preset distance. In this embodiment, the preset direction is the left and right direction. The pressure cover assembly 4 is arranged on the rear side of the positioning seat 2 and the workpiece temporary storage member 3, and the protective cover 5 is arranged on the rear side of the pressure cover assembly 4.

[0032] The pressing cover assembly 4 includes a mounting plate 41 , a clamping plate 42 , an outer plate 43 , a toggle member 44 , a toggle rod 45 , a rotation driving device 46 , a moving member 47 and a pressing head 48 .

[0033] The mounting plate 41 is arranged on the bottom plate 1 in an extending manner in the up-down direction. The clamping plate 42 and the outer plate 43 are both arranged on the upper part of the mounting plate 41, and the clamping plate 42 is arranged between the mounting plate 41 and the outer plate 43, and the outer plate 43 is provided with a cavity on the side facing the clamping plate 42. The clamping plate 42 is provided with an inverted "U"-shaped sliding groove 421, and the end of the sliding groove and the middle thereof are at different height positions in the vertical direction, and the two ends of the sliding groove are at different horizontal positions in the horizontal direction; the outer plate 43 is provided with an inverted "U"-shaped avoidance hole 431, and the avoidance hole 431 is arranged correspondingly and connected with the sliding groove 421, and the hole width of the avoidance hole 431 is less than or equal to the groove width of the sliding groove 421.

[0034] The first end of the toggle rod 45 is sleeved with at least one rolling member 49. In this embodiment, two rolling members 49 are used as an example. One rolling member 49 is arranged in the sliding groove 421 and is adjacent to the groove wall of the sliding groove 421. The other rolling member 49 is arranged in the cavity. Both rolling members 49 can rotate around their own axes. The rolling member 49 can be a roller or a bearing. The second end of the toggle rod 45 passes through the avoidance hole 431 and is connected to the upper part of the moving member 47.

[0035] The moving member 47 extends in the up-down direction, and the press-fitting head 48 is connected to the lower part of the moving member 47 and protrudes downward from the bottom wall of the moving member 47 .

[0036] The rotary drive device 46 is fixedly connected to the upper part of the mounting plate 41, and the rotary drive device 46 and the clamping plate 42 are respectively arranged on opposite sides of the mounting plate 41. The driving shaft 461 of the rotary drive device 46 passes through the mounting plate 41 and the clamping plate 42 and extends to the outer plate 43. The driving shaft 461 is preferably arranged on the symmetry axis of the sliding groove 421.

[0037] The toggle member 44 is disposed between the clamping plate 42 and the outer plate 43. Preferably, the toggle member 44 is disposed in the cavity, which is conducive to preventing the toggle member 44 from moving along the axial direction of the toggle rod 45. Even in the process of long-distance transportation, it can ensure that the toggle rod 45 will not accidentally disengage from the sliding groove 421. The first end of the toggle member 44 is connected to the driving shaft 461, and the second end of the toggle member 44 is provided with a waist-shaped hole 441, which is sleeved on the outside of one of the rolling members 49 to achieve the connection between the toggle member 44 and the toggle rod 45. The outer peripheral wall of the rolling member 49 is adjacent to the hole wall of the waist-shaped hole 441.

[0038] The rotary drive device 46 is preferably a motor. The rotary drive device 46 drives the toggle rod 45 to move along the extension direction of the sliding groove 421 through the toggle member 44, thereby driving the press head 48 to move up and down and horizontally between the workpiece temporary storage member 3 and the positioning seat 2.

[0039] Furthermore, the sliding slot 421 includes a translation section 4211 and two lifting sections 4212. The two lifting sections 4212 are respectively connected to the two ends of the translation section 4211 and extend downward. The lifting section 4212 is connected to the translation section 4211, and the distance between the two lifting sections 4212 is equal to the preset distance. Preferably, the two lifting sections 4212 are respectively arranged in correspondence with the positioning seat 2 and the workpiece temporary storage 3, ensuring that when the press-fitting head 48 moves to the lifting section 4212, it can be located just above the positioning seat 2 or the workpiece temporary storage 3, which is conducive to facilitating accurate material removal and accurate press-fitting.

[0040] The U-shaped capping device of this embodiment also includes a control unit and two first in-place detection devices 6, which are respectively arranged on the left and right sides of the outer plate 43, and the first in-place detection device 6 is preferably a photoelectric sensor. Correspondingly, both sides of the upper part of the moving member 47 are provided with a first detection plate 471, and the first detection plate 471 is arranged corresponding to the first in-place detection device 6. When the driving shaft 461 of the rotary drive device 46 rotates clockwise, so that the toggle rod 45 moves to the lower part of the lifting section 4212 on the right, that is, when the press-fitting head 48 reaches the material-taking position, the press-fitting head 48 completes the material taking, and the first detection plate 471 can trigger the first in-place detection device 6 on the right to send a material-taking in-place signal to the control unit; thereafter, the driving shaft 461 of the rotary drive device 46 can rotate counterclockwise, so that when the toggle rod 45 moves to the lower part of the lifting section 4212 on the left, the press-fitting head 48 reaches the press-fitting position and presses the cover body 10 onto the product, at this time, the second detection plate can trigger the first in-place detection device 6 on the left to send a press-fitting in-place signal to the control unit. Thereafter, the rotary drive device 46 can rotate clockwise to separate the press-fitting head 48 from the cover body 10 , making it convenient for workers to take away the press-fitted product.

[0041] exist Figure 6 In the embodiment, the lower part of the press-fitting head 48 is provided with a positioning column 481 and at least one protrusion 482, the positioning column 481 protrudes the protrusion 482 downward, and the outer peripheral wall of the positioning column 481 is provided with at least one step portion, the positioning column 481 is used to cooperate with the central hole 101 on the cover body 10, and the step portion can abut against the top wall of the cover body 10 and push the cover body 10 downward during press-fitting. The protrusion 482 extends in the left and right directions and is used to cooperate and connect with the groove 102 on the cover body 10. In this embodiment, two protrusions 482 are taken as an example, and the two protrusions 482 are respectively arranged on the left and right sides of the positioning column 481, so that a clamping groove is formed between the protrusion 482 and the positioning column 481.

[0042] In one embodiment, the protrusion 482 may be interference fit with the groove 102 on the cover 10 so as to remove the cover 10 .

[0043] In another embodiment, a connecting portion 103 is formed between the groove 102 of the cover body 10 and the central hole 101 , and the clamping groove can be interference-fitted with the connecting portion 103 to lift the cover body 10 .

[0044] In other embodiments, the pressing head 48 may also be provided with a clamping opening for clamping the cover body 10, and the clamping opening clamps from the outer peripheral wall of the cover body 10. During pressing, the clamping opening is released, and the cover body 10 is pressed onto the ink nozzle of the product under the downward pressure of the step portion of the positioning column 481.

[0045] In order to achieve accurate left-right and up-down movement of the press-fitting head 48, the capping assembly 4 further includes a transverse guide rail 40, a transverse slider 50, a moving seat 60, a vertical slider 70 and a vertical guide rail 80. The transverse guide rail 40 is horizontally extended below the clamping plate 42, the vertical guide rail 80 is extended on the moving member 47 in the up-down direction, the transverse slider 50 and the vertical slider 70 are respectively arranged on both sides of the moving seat 60, the transverse slider 50 is connected with the transverse guide rail 40, and the vertical guide rail 80 is connected with the vertical slider 70.

[0046] exist Figure 7 In the embodiment, the temporary storage part 3 of the workpiece includes a first fixed plate 31, a top height column 32 and a positioning sleeve 33. The top height column 32 is arranged on the first fixed plate 31 and extends in the up-down direction. The top wall of the top height column 32 is provided with a positioning groove. The positioning sleeve 33 is arranged in the positioning groove and protrudes upward from the positioning groove. A workpiece placement cavity 321 is formed between the outer peripheral wall of the positioning sleeve 33 and the groove wall of the positioning groove. The cover body 10 is arranged in the workpiece placement cavity 321 and covers the positioning sleeve 33. A blind hole is arranged in the positioning sleeve 33, and the central hole 101 of the cover body 10 is connected to the blind hole. In order to control the groove 102 on the cover body 10 to be placed exactly in the left-right direction, at least one arc groove 322 is arranged in the workpiece placement cavity 321 in this embodiment. The arc groove 322 is recessed in the outer cavity wall of the workpiece placement cavity 321, and is used to cooperate with the arc protrusion 104 on the outer peripheral wall of the cover body 10. When the cover body 10 is placed in the workpiece placement cavity 321 , the arc-shaped protrusion 104 and the arc-shaped groove 322 cooperate with each other to achieve the positioning of the cover body 10 .

[0047] exist Figure 8 In the embodiment, the positioning seat 2 includes a second fixing plate 21, a first positioning plate 22 and a second positioning plate 23, and the first positioning plate 22 and the second positioning plate 23 are both arranged on the second fixing plate 21. A product placement cavity is formed between the first positioning plate 22 and the second positioning plate 23, and the first positioning plate 22 is provided with a first supporting portion 221 and a second supporting portion 222 on the upper and lower sides of the product placement cavity, respectively. The product is arranged in the product placement cavity, and the lower and upper parts of the product are supported on the first supporting portion 221 and the second supporting portion 222, respectively, and the cover body is pressed onto the ink nozzle on the upper part of the product. A second in-place detection device 7 connected to the control unit is also arranged in the product placement cavity, and the second in-place detection device 7 is used to detect whether there is a product in the product placement cavity, and the second in-place detection device 7 can be a photoelectric sensor or a pressure switch.

[0048] When the second in-place detection device 7 detects the presence of a product in the product placement cavity, a product in-place signal is sent to the control unit, and the control unit controls the rotary drive device 46 to perform material picking and pressing actions, avoiding manual control, which is beneficial to simplifying the operating steps and saving operating time, so as to improve work efficiency.

[0049] This embodiment takes the press-fitting of the cover body at the ink nozzle of the ink cartridge as an example. In other embodiments, it can also be used for press-fitting other products and cover bodies, which are not listed here one by one.

[0050] In summary, the utility model provides a positioning seat for positioning the product to be press-fitted with a cover body, and provides a workpiece temporary storage member for positioning the cover body, so as to facilitate the cover pressing assembly to take materials from the workpiece temporary storage member and press-fit them onto the product; by providing a sliding groove, when the rotary drive device rotates, the moving member and the pressing head are driven by the toggle member and the toggle rod to move along the extension direction of the sliding groove to achieve horizontal and vertical movement, and has the advantages of simple structure and small size; the utility model can replace manual pressing to ensure that the pressing is in place every time, and has the advantages of high work efficiency and good pressing quality.

[0051] Finally, it should be emphasized that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. U-shaped capping device, characterized in that: include: Positioning seat; A temporary workpiece storage member, wherein the temporary workpiece storage member and the positioning seat are arranged in a preset direction and spaced apart by a preset distance; The pressure cover assembly comprises a mounting plate, a clamping plate, a toggle member, a toggle rod, a rotary drive device, a moving member and a pressing head. The mounting plate is arranged on one side of the positioning seat and the workpiece temporary storage member, the clamping plate is arranged on the mounting plate, a sliding groove is provided on the clamping plate, the end of the sliding groove and the middle part thereof are at different height positions in the vertical direction, and the two ends of the sliding groove are at different horizontal positions in the horizontal direction. One end of the toggle rod is movably arranged in the sliding groove, the other end of the toggle rod is connected to the moving member, the pressing head is connected to the lower part of the moving member, one end of the toggle member is connected to the driving shaft of the rotary drive device, and the other end of the toggle member is connected to the toggle rod, and the rotary drive device drives the toggle rod to move along the extension direction of the sliding groove through the toggle member, thereby driving the pressing head to move up and down and horizontally between the workpiece temporary storage member and the positioning seat.

2. The U-shaped capping device according to claim 1, characterized in that: The sliding slot includes a translation section and two lifting sections, the two lifting sections are respectively connected to the two ends of the translation section and extend downward, the lifting section is connected to the translation section, and the distance between the two lifting sections is equal to the preset distance.

3. The U-shaped capping device according to claim 2, characterized in that: The two lifting sections are respectively arranged correspondingly to the positioning seat and the workpiece temporary storage part.

4. The U-shaped capping device according to claim 1, characterized in that: The mounting plate is also provided with an outer plate, which is arranged between the moving part and the clamping plate. The outer plate is provided with an avoidance hole corresponding to the sliding groove for the toggle rod to pass through, and the hole width of the avoidance hole is less than or equal to the groove width of the sliding groove.

5. The U-shaped capping device according to claim 4, characterized in that: The outer plate is provided with a first in-place detection device on both sides thereof, and the first detection plate is provided with a first detection plate on both sides of the movable member. When the pressing head moves to the material taking position or the pressing position, the first detection plate can trigger the corresponding first in-place detection device to send an in-place signal.

6. The U-shaped capping device according to claim 1, characterized in that: The toggle rod is sleeved with a rolling member, which is arranged in the sliding groove and adjacent to the groove wall of the sliding groove, and the rolling member can rotate around its own axis.

7. The U-shaped capping device according to claim 1, characterized in that: A positioning column and at least one protrusion are disposed at the lower portion of the press-fitting head, and the positioning column protrudes downward from the protrusion.

8. The U-shaped capping device according to claim 1, characterized in that: The pressure cover assembly also includes a transverse guide rail, a transverse slider, a movable seat, a vertical slider and a vertical guide rail. The transverse guide rail is horizontally extended and arranged below the clamping plate. The transverse slider and the vertical slider are respectively arranged on both sides of the movable seat. The transverse slider is cooperatively connected with the transverse guide rail. The vertical guide rail is extended along the up and down directions on the movable member. The vertical guide rail is cooperatively connected with the vertical slider.

9. The U-shaped capping device according to any one of claims 1 to 8, characterized in that: The workpiece temporary storage member includes a first fixed plate, a top height column and a positioning sleeve, wherein the top height column is arranged on the first fixed plate, a positioning groove is provided on the top wall of the top height column, the positioning sleeve is arranged in the positioning groove and protrudes upward from the positioning groove, a workpiece placement cavity is formed between the outer peripheral wall of the positioning sleeve and the groove wall of the positioning groove, at least one arc groove is provided in the workpiece placement cavity, and a blind hole is provided in the positioning sleeve.

10. The U-shaped capping device according to any one of claims 1 to 8, characterized in that: The positioning seat includes a second fixing plate, a first positioning plate and a second positioning plate, the first positioning plate and the second positioning plate are both arranged on the second fixing plate, and a product placement cavity is formed between the first positioning plate and the second positioning plate, and the first positioning plate is respectively provided with a first supporting portion and a second supporting portion on upper and lower sides of the product placement cavity; A second in-place detection device is also provided in the product placement cavity, and the second in-place detection device is used to detect whether there is a product in the product placement cavity; The U-shaped capping device also includes a control unit, which is connected to the second in-place detection device and the rotary drive device. When the second in-place detection device detects the presence of a product in the product placement cavity, the control unit is triggered to control the rotary drive device to perform material picking and pressing actions.