A push gauge flush adjustment mechanism for upper sealing device

By designing a flush adjustment mechanism for the upper sealing device, the problem of uneven pushing gears in existing adhesive equipment leads to crooked cover transportation, and a higher quality book adhesive and simpler operating process is achieved.

CN119774338APending Publication Date: 2025-04-08SHENZHEN PRECISION INTELLIGENT MASCH CO LTD
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Patent Information

Application Number
CN202411748472.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-02
Publication Date
2025-04-08

AI Technical Summary

Technical Problem

In existing glue equipment, the push plane of the push plane of the pushing gauge is difficult to be completely flush with the ideal push plane, which leads to the cover being skewed during transportation, affecting the quality and appearance consistency of the finished product of the book.

Method used

A flush adjustment mechanism for the thrust gauge for the sealing device is designed, including two sets of thrust gauge movement components, a difference angle adjustment component, a tensioning component and an interactive component. Through the synergy of these components, the relative position and tension of the thrust gauge can be adjusted to ensure that the thrust gauge is always in a horizontal moving state.

Benefits of technology

Through this adjustment mechanism, the problem of cover transportation skewed caused by uneven pushing rules can be effectively solved, the quality of book glue is improved, the operation is simplified and the adjustment efficiency can be improved.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention relates to the field of book post-printing binding equipment, and discloses a push gauge leveling adjustment mechanism for a sealing device, including two groups of push gauge motion components for conveying covers, a differential angle adjustment component for adjusting the relative position of the push gauge motion components, a tensioning component for adjusting the tension of the push gauge motion components, and an interactive component for operating the differential angle adjustment component. The interactive component, the differential angle adjustment component, and the push gauge motion component are all installed on the frame of the binding equipment. The push gauge motion component includes a plurality of sprocket shafts 2, the sprocket shafts 2 are fixedly connected to the inside of the frame, and the outer side of the sprocket shaft 2 is rotatably connected to a sprocket 2. By rotating a hand wheel from the outside of the equipment, one of the sprockets 1 can be driven to rotate, so that the relative positions of the two push gauge motion components are adjusted to ensure that the two push gauge blocks are on the same horizontal line to ensure the quality of book binding, and the operation is simple, which greatly improves the adjustment efficiency.
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Description

Technical Field

[0001] The invention relates to the field of book post-printing glue binding equipment, in particular to a push gauge flush adjustment mechanism for an upper sealing device. Background Art

[0002] In the field of book post-printing binding equipment, the quality of the finished book is highly dependent on the performance of each functional mechanism of the binding equipment. Among them, the upper sealing device, as a key module, is mainly responsible for the transportation and cover pressing of the cover. Its working quality directly determines the overall performance of the upper sealing device. In practical applications, the quality of cover transportation and cover pressing are closely related. If the cover is offset or skewed during transportation, it will cause the cover pressing to be incorrect, which will eventually affect the overall appearance and quality of the finished book.

[0003] At present, the mainstream way of transporting covers is to push the cover forward through a push gauge. The push gauge is usually fixed on the chain link, and the continuous transportation of the cover is achieved by relying on the circular motion of the chain. However, in actual production, the operating state of the push gauge directly affects the performance of the upper sealing device, but due to the existence of manufacturing errors and assembly errors, the push plane of the push gauge is often difficult to be completely flush with the ideal push plane. In addition, with the long-term use and wear of the chain, this error will be further aggravated, causing the cover to be skewed during transportation. The skew problem of the cover not only increases the inaccuracy of the press line position in the press line link, but also causes the cover to shift, which ultimately seriously affects the quality and appearance consistency of the finished book. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a push gauge level adjustment mechanism for a sealing device, which solves the problem of skewed cover transportation caused by uneven push gauges in the prior art binding equipment.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a push gauge level adjustment mechanism for a sealing device, comprising two groups of push gauge motion components for conveying the cover, a differential angle adjustment component for adjusting the relative position of the push gauge motion component, a tensioning component for adjusting the tension of the push gauge motion component, and an interactive component for operating the differential angle adjustment component, wherein the interactive component, the differential angle adjustment component, and the push gauge motion component are all installed on the frame of the binding equipment.

[0006] Preferably, the push gauge motion assembly includes multiple sprocket shafts 2, the sprocket shafts 2 are fixedly connected to the inside of the frame, the outer side of the sprocket shafts 2 is rotatably connected to sprocket 2, and the inside of the frame is also rotatably installed with sprocket 3. The sprockets 2 and sprockets 3 are connected by a chain, and a push gauge block is fixedly connected to the outer side of one of the links of the chain.

[0007] Preferably, the differential angle adjustment assembly includes a sprocket shaft one, the sprocket shaft one is rotatably connected to the frame, the outer side of the sprocket shaft one is fixedly connected to an overload sprocket, the outer side of the sprocket shaft one is connected to an inner sprocket sleeve via a key, the outer side of the sprocket shaft one is sleeved with an outer sprocket sleeve, the outer and inner sprocket sleeves facing each other are fixedly connected to sprocket one, the outer circumference of the outer sprocket sleeve is provided with an adjustment sleeve, the middle part of the adjustment sleeve is provided with an arc groove, the outer side of the outer sprocket sleeve is connected to a spherical bearing, the spherical bearing is located in the middle of the arc groove, and the outer side of the adjustment sleeve is fixedly connected to a bearing mounting sleeve.

[0008] Preferably, the differential angle adjustment assembly further comprises two bearing mounting plates, the bearing mounting plates are fixedly connected to the inside of the frame, and the outer sprocket sleeve and the inner sprocket sleeve are respectively connected to the inside of the two bearing mounting plates through bearing sleeves.

[0009] Preferably, the sprocket shaft is a two-section stepped shaft, one large and one small, and the junction of the large and small shaft sections adopts chamfered corner transition, the large shaft section has three keyways and one retaining ring groove, and the small shaft section has two keyways.

[0010] Preferably, the interactive component includes a nut seat, which is fixedly connected to the frame, an adjustment screw is threadedly connected to the middle part of the nut seat, one end of the adjustment screw is fixedly connected to a screw sleeve, and the adjustment screw is fixedly connected to the inner ring bearing of the bearing mounting sleeve.

[0011] Preferably, the interactive component also includes a guide shaft, which is fixedly connected to the frame, and a digital display base plate is slidably connected to the outer side of the guide shaft. The digital display base plate is sleeved on the outer side of the screw sleeve, and two adjustable handles are threadedly connected to the outer side of the digital display base plate, one end of the adjustable handle abuts against the outer side of the guide shaft, and the other end of the adjustable handle abuts against the outer side of the screw sleeve.

[0012] Preferably, a digital display body is fixedly connected to the outer side of the digital display base plate, and a handwheel is fixedly connected to one end of the lead screw sleeve away from the nut seat.

[0013] Preferably, the tensioning assembly includes a sprocket shaft three and a tension spring hanging shaft, both of which are installed on a frame, the sprocket shaft three is rotatably connected to two sprockets four on the outside, the sprocket shaft three is rotatably connected to two tensioning swing arms on the outside, the other end of the tensioning swing arm is rotatably connected to a sprocket five, a tensioning spring is installed on the outside of the tension spring hanging shaft, the other end of the tensioning spring is rotatably connected to the inside of the tensioning swing arm, and the chain passes around the outside of sprockets four and five.

[0014] Preferably, three through holes are opened in the middle of the digital display base plate, two larger holes are opened with L grooves to the side of the plate, and threaded holes are opened on the side, and the adjustable handle is connected to the threaded holes.

[0015] Working principle: When the equipment has been working for a long time, the position of the push gauge block will be misaligned. At this time, stop the power input to the overload sprocket, and after the machine stops completely, loosen the two adjustable handles. At this time, the handwheel can be rotated. Turn the handwheel according to the indication of the digital display body. When the handwheel rotates, it drives the screw sleeve and the adjustment screw to rotate. Because the adjustment screw is threadedly connected to the nut seat, the adjustment screw will move horizontally under the action of the internal thread of the nut seat during the rotation of the handwheel. When the adjustment screw moves, it will also drive the bearing mounting sleeve to move. When the two sprockets move relative to each other, the chains on their outer sides are driven to move relative to each other, and the positions of the two push gauge blocks are relatively moved. When the two push gauge blocks are in a flush state, stop turning the handwheel and tighten the two adjustable handles to complete an adjustment operation.

[0016] The present invention provides a push gauge flush adjustment mechanism for an upper sealing device.

[0017] Beneficial effects:

[0018] 1. The present invention can drive one of the sprockets to rotate by rotating the hand wheel from the outside of the equipment, so as to adjust the relative positions of the two push gauge motion components and ensure that the two push gauge blocks are on the same horizontal line to ensure the quality of book binding. The operation is simple and the adjustment efficiency is greatly improved.

[0019] 2. The present invention pulls the tensioning swing arm through the tensioning spring, thereby adjusting the tension of the entire chain, ensuring that the push gauge block is always in a horizontal moving state, so as to ensure the stability of the water cover transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A perspective view of the present invention;

[0021] Figure 2 is a schematic cross-sectional structure diagram of the differential angle adjustment assembly in the present invention;

[0022] Figure 3 It is a schematic diagram of the structure explosion of the interactive component in the present invention;

[0023] Figure 4 It is a structural schematic diagram of the tensioning assembly in the present invention;

[0024] Figure 5 It is a schematic diagram of the structural explosion of the differential angle adjustment component in the present invention.

[0025] Among them, 1. Interactive component; 101. Nut seat; 102. Adjusting screw; 103. Screw sleeve; 104. Digital display base plate; 105. Adjustable handle; 106. Guide shaft; 107. Digital display body; 108. Handwheel; 2. Differential angle adjustment component; 201. Sprocket shaft 1; 202. Outer sprocket sleeve; 203. Inner sprocket sleeve; 204. Spherical bearing; 205. Adjustment sleeve; 206. Arc groove; 2 07. Bearing mounting sleeve; 208. Overload sprocket; 209. Bearing mounting plate; 210. Sprocket one; 3. Push gauge motion assembly; 301. Sprocket shaft two; 302. Sprocket two; 303. Sprocket three; 304. Chain; 305. Push gauge block; 4. Tensioning assembly; 401. Sprocket shaft three; 402. Sprocket four; 403. Tensioning swing arm; 404. Sprocket five; 405. Tension spring hanging shaft; 406. Tensioning spring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example:

[0028] Please see attached Figure 1 and attached Figure 4 An embodiment of the present invention provides a push gauge flush adjustment mechanism for a sealing device, including two sets of push gauge motion components 3 for conveying book covers. The push gauge motion components 3 are installed on the frame of a binding device. After the book cover is placed on the upper part of the push gauge motion component 3, the push gauge motion component 3 can be driven by the driving mechanism inside the binding device to work and convey the cover. The push gauge motion assembly 3 includes a plurality of sprocket shafts 301, which are fixedly connected to the inside of the frame, and the outer side of the sprocket shaft 301 is rotatably connected to the sprocket 2 302, and the inside of the frame is also rotatably installed with a sprocket 303, and the sprocket 2 302 and the sprocket 3 303 are connected by a chain 304, and the chain 304 is sleeved on the outside of the sprocket 2 302 and the sprocket 3 303, and when the sprocket 3 303 rotates, the sprocket 2 302 is driven to rotate together, and a push gauge block 305 is fixedly connected to the outer side of one of the chain links of the chain 304, and after the cover of the book is placed on the upper part of the chain 304, the push gauge block 305 is used to block and level the cover, and when the chain 304 moves, the push gauge block 305 can be driven to move together to complete the conveying of the cover.

[0029] Please see attached Figure 1 , Attachment Figure 2 and attached Figure 5 The push gauge flush adjustment mechanism also includes an angle difference adjustment component 2 for adjusting the relative position of the push gauge motion component 3. The angle difference adjustment component 2 is also installed inside the frame. The angle difference adjustment component 2 includes a sprocket shaft 201. The sprocket shaft 201 is a two-section stepped shaft, one large and one small, and the junction of the large and small shaft sections adopts a chamfered corner transition. The large shaft section is provided with three keyways and a retaining ring groove, and the small shaft section is provided with two keyways; the sprocket shaft 201 is rotatably connected to the frame, and an overload sprocket 208 is fixedly connected to the outer side of the sprocket shaft 201, and is connected to the driving mechanism. The overload sprocket 208 is driven to rotate by the driving mechanism to realize the operation of the push gauge motion component 3. The outer side of the sprocket shaft 201 is connected to the inner sprocket sleeve 203 through a key. The inner sprocket sleeve 203 can be regarded as a three-section stepped shaft with an axial keyway through hole. From left to right, the shaft sections 1 to 3 have a size change of: shaft section 1 < shaft section 2 < shaft section 3. The intersection surface of the shaft section 1 and the shaft section 2 is circumferentially evenly distributed with threaded holes. The axial keyway through hole itself is connected to the large shaft section of the sprocket shaft 201 close to the small shaft section through a key sleeve. The outer side of the sprocket shaft 201 is sleeved with an outer sprocket sleeve 202. The sprocket sleeve 202 can be regarded as a four-section stepped shaft with axial through holes. From left to right, the shaft sections one to four vary in size as follows: shaft section one < shaft section two < shaft section three > shaft section four, among which shaft section two > shaft section four. In addition, threaded holes are evenly distributed circumferentially on the intersection surface of shaft section one and shaft section two, and the proximal end surface of shaft section four is milled flat and punched with threaded holes. The axial through hole of the outer sprocket sleeve 202 itself is sleeved on the large shaft section on the side of the sprocket shaft 1 201 away from the small shaft section, and is rotatably connected to the outer sprocket sleeve 202. The ends of the outer sprocket sleeve 202 and the inner sprocket sleeve 203 facing each other are fixedly connected with a sprocket 1 210. The outer sprocket sleeve 202 is provided with an adjustment sleeve 205. The middle of the adjustment sleeve 205 is provided with an arc groove 206. The outer side of the outer sprocket sleeve 202 is connected with a joint bearing 204. The joint bearing 204 is located in the middle of the arc groove 206. During the horizontal movement of the adjustment sleeve 205, after cooperating with the arc groove 206 and the joint bearing 204, the outer sprocket sleeve 202 can be driven to rotate, thereby driving the sprocket 1 210 connected to the outer sprocket sleeve 202 to rotate. The sprocket 1 210 is engaged with the chain 304. When the sprocket 1 210 rotates, the chain 304 moves together, thereby adjusting the position of the push gauge block 305 on that side, so that the two push gauge blocks 305 can be adjusted to a horizontal state. The outer side of the adjustment sleeve 205 is fixedly connected with a bearing mounting sleeve 207. The bearing mounting sleeve 207 is a cylinder drilled with two stepped through holes, one large and one small. The large hole is provided with a bearing. Three through holes and three threaded through holes are evenly distributed in the circumferential direction of the end surface. The end surface on one side of the large hole is fixedly connected to the bearing by three threaded through holes, gaskets and screws. In addition, the bearing is fixedly connected to the three threaded holes on the end surface of the adjustment sleeve 205 by three through holes and screws.

[0030] Please see attached Figure 5 The differential angle adjustment assembly 2 also includes two bearing mounting plates 209, which are fixedly connected to the inside of the frame. The outer sprocket sleeve 202 and the inner sprocket sleeve 203 are respectively connected to the inside of the two bearing mounting plates 209 through bearing sleeves. The bearing mounting plates 209 ensure the smooth movement of the sprocket shaft 201, the inner sprocket sleeve 203 and the outer sprocket sleeve 202.

[0031] Please see attached Figure 4 The push gauge flush adjustment mechanism also includes a tensioning assembly 4 for adjusting the tension of the push gauge motion assembly 3. The tensioning assembly 4 includes a sprocket shaft 3 401 and a tension spring hanging shaft 405. The sprocket shaft 3 401 and the tension spring hanging shaft 405 are both installed on the frame. The outer side of the sprocket shaft 3 401 is rotatably connected to two sprocket wheels 402. The outer side of the sprocket shaft 3 401 is rotatably connected to two tensioning swing arms 403. The other end of the tensioning swing arm 403 is rotatably connected to a sprocket wheel 5 404. Chain 304 is passed around the outside of sprocket four 402 and sprocket five 404, and a tension spring 406 is installed on the outside of the tension spring hanging shaft 405. The other end of the tension spring 406 is rotatably connected to the inside of the tension swing arm 403. The free end of the tension swing arm 403 is pulled by the tension of the tension spring 406, thereby acting on sprocket five 404, thereby pulling the chain 304, making the chain 304 taut, thereby ensuring the smooth operation of the book cover.

[0032] Please see attached Figure 1 and attached Figure 3The push gauge flush adjustment mechanism also includes an interactive component 1 for operating the differential angle adjustment component 2. The interactive component 1 includes a nut seat 101, which is fixedly connected to the frame. The middle part of the nut seat 101 is threadedly connected with an adjustment screw 102. It is a three-section stepped shaft, and the middle shaft section has a thread. One of the two end faces has a threaded hole, and the middle shaft section is threadedly connected to the nut seat 101. One end of the adjusting screw 102 is fixedly connected to a screw sleeve 103. The screw sleeve 103 is a two-section stepped shaft, one large and one small. The end of the large shaft section is provided with a hole, and the side is provided with a threaded hole. The large shaft section itself is sleeved on the shaft section without a threaded hole of the adjusting screw 102. The adjusting screw 102 is fixedly connected to the inner ring bearing of the bearing mounting sleeve 207. When the screw sleeve 103 rotates, it drives the adjusting screw 102 to rotate synchronously. At this time, the axial position of the adjusting screw 102 and the nut seat 101 changes, and the bearing mounting sleeve 207 is acted on at the same time. Under the action of the arc groove 206, the sprocket 210 is driven to rotate, thereby completing the position adjustment of the push gauge block 305; the interactive component 1 also includes a guide Towards shaft 106, guide shaft 106 is fixedly connected to the frame, guide shaft 106 is a two-section stepped shaft, one large and one small, the small shaft section is a full-section threaded shaft section, the outer side of the guide shaft 106 is slidably connected with a digital display base plate 104, the digital display base plate 104 is sleeved on the outer side of the screw sleeve 103, the digital display base plate 104 is provided with three through holes, two of the larger holes are provided with L grooves to the side of the plate, and threaded holes are provided on the side to form a flexible part, the two holes are respectively sleeved on the screw sleeve 103 and the guide shaft 106, the outer side of the digital display base plate 104 is threadedly connected to two adjustable handles 105, the adjustable handles 105 are specifically connected to the threaded holes provided on the side of the digital display base plate 104.

[0033] Please see attached Figure 3 The digital display body 107 is fixedly connected to the outside of the digital display base plate 104. The digital display body 107 is connected to the shaft section of the screw sleeve 103 and is used to record the deflection angle of the screw sleeve 103. After cooperating with the difference angle adjustment component 2, the position of the push gauge block 305 can be better adjusted. The end of the screw sleeve 103 away from the nut seat 101 is fixedly connected to a handwheel 108, and the push gauge block 305 can be adjusted more conveniently through the handwheel 108. The end of the small shaft section of the screw sleeve 103 is designed to be square for connection with the handwheel 108.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A push gauge flush adjustment mechanism for an upper sealing device, characterized in that: The invention comprises two sets of push gauge motion components (3) for conveying covers, a differential angle adjustment component (2) for adjusting the relative position of the push gauge motion components (3), a tensioning component (4) for adjusting the tension of the push gauge motion components (3), and an interactive component (1) for operating the differential angle adjustment component (2). The interactive component (1), the differential angle adjustment component (2) and the push gauge motion component (3) are all installed on a frame of the binding equipment.

2. A push gauge flush adjustment mechanism for an upper sealing device according to claim 1, characterized in that: The push gauge motion assembly (3) includes a plurality of sprocket shafts (301), wherein the sprocket shafts (301) are fixedly connected to the inside of a frame, the outer side of the sprocket shafts (301) is rotatably connected to a sprocket (302), and a sprocket (303) is also rotatably installed inside the frame, the sprockets (302) and (303) are connected via a chain (304), and a push gauge block (305) is fixedly connected to the outer side of one of the chain links of the chain (304).

3. The push gauge flush adjustment mechanism for the upper sealing device according to claim 1, characterized in that: The differential angle adjustment assembly (2) comprises a sprocket shaft (201), the sprocket shaft (201) being rotatably connected to a frame, an overload sprocket (208) being fixedly connected to the outer side of the sprocket shaft (201), an inner sprocket sleeve (203) being key-connected to the outer side of the sprocket shaft (201), an outer sprocket sleeve (202) being sleeved to the outer side of the sprocket shaft (201), and the outer sprocket sleeve (202) and the inner sprocket sleeve (203) being mutually connected. One end of the outer sprocket sleeve (202) is fixedly connected to a sprocket wheel (210), an adjustment sleeve (205) is sleeved on the outer periphery of the outer sprocket sleeve (202), an arc groove (206) is opened in the middle of the adjustment sleeve (205), a spherical bearing (204) is connected to the outer side of the outer sprocket sleeve (202), the spherical bearing (204) is located in the middle of the arc groove (206), and a bearing mounting sleeve (207) is fixedly connected to the outer side of the adjustment sleeve (205).

4. A push gauge flush adjustment mechanism for an upper sealing device according to claim 3, characterized in that: The differential angle adjustment assembly (2) further comprises two bearing mounting plates (209), wherein the bearing mounting plates (209) are fixedly connected inside the frame, and the outer sprocket sleeve (202) and the inner sprocket sleeve (203) are respectively connected inside the two bearing mounting plates (209) via bearing sleeves.

5. The push gauge flush adjustment mechanism for the upper sealing device according to claim 3, characterized in that: The sprocket shaft 1 (201) is a two-section stepped shaft, one large and one small, and the intersection of the large and small shaft sections adopts a chamfered corner transition. The large shaft section has three keyways and a retaining ring groove, and the small shaft section has two keyways.

6. The push gauge flush adjustment mechanism for the upper sealing device according to claim 3, characterized in that: The interactive component (1) comprises a nut seat (101), the nut seat (101) is fixedly connected to the frame, an adjusting screw (102) is threadedly connected to the middle part of the nut seat (101), one end of the adjusting screw (102) is fixedly connected to a screw sleeve (103), and the adjusting screw (102) is fixedly connected to the inner ring of the bearing of the bearing mounting sleeve (207).

7. A push gauge flush adjustment mechanism for an upper sealing device according to claim 6, characterized in that: The interactive component (1) also includes a guide shaft (106), the guide shaft (106) is fixedly connected to the frame, the outer side of the guide shaft (106) is slidably connected to a digital display base plate (104), the digital display base plate (104) is sleeved on the outer side of the lead screw sleeve (103), and the outer side of the digital display base plate (104) is threadedly connected to two adjustable handles (105).

8. The push gauge flush adjustment mechanism for the upper sealing device according to claim 7, characterized in that: A digital display body (107) is fixedly connected to the outside of the digital display base plate (104), and a hand wheel (108) is fixedly connected to one end of the lead screw sleeve (103) away from the nut seat (101).

9. The push gauge flush adjustment mechanism for the upper sealing device according to claim 2, characterized in that: The tensioning assembly (4) comprises a sprocket shaft three (401) and a tension spring hanging shaft (405), both of which are mounted on a frame, the outer side of the sprocket shaft three (401) is rotatably connected to two sprocket fours (402), the outer side of the sprocket shaft three (401) is rotatably connected to two tensioning swing arms (403), the other end of the tensioning swing arm (403) is rotatably connected to a sprocket five (404), a tensioning spring (406) is mounted on the outer side of the tension spring hanging shaft (405), the other end of the tensioning spring (406) is rotatably connected to the inner side of the tensioning swing arm (403), and the chain (304) passes around the outside of the sprocket four (402) and the sprocket five (404).

10. The push gauge flush adjustment mechanism for the upper sealing device according to claim 7, characterized in that: The digital display base plate (104) has three through holes in the middle, two of which are larger and have L-shaped grooves extending to the side of the plate, and threaded holes are formed on the side, and the adjustable handle (105) is connected to the threaded holes.