CN219483192U - Duplex position coating machine convenient to switch - Google Patents

Abstract

The utility model discloses a double-station coating machine convenient to switch, which comprises a frame, a pull roll mechanism, a comma coating mechanism and a slit coating mechanism, wherein the pull roll mechanism and the comma coating mechanism are sequentially arranged along the height direction of the frame, the slit coating mechanism is arranged beside the frame, the comma coating mechanism comprises a height adjusting part and a comma roll part, the comma roll part is rotationally arranged on the height adjusting part, the height adjusting part drives the comma roll part to be close to or far from the pull roll, the slit coating mechanism comprises a trolley and a slit coating part, the slit coating part is arranged on the trolley, and the trolley is pushed to drive the slit coating part to be close to or far from the pull roll. According to the utility model, the slot coating part is arranged on the trolley, when the slot coating device is used, the height adjusting part lifts the comma roller part, then the trolley is pushed in to enable the slot coating part to be close to the traction roller and glue the base material, and when comma coating is carried out, or the comma roller part is operated in the opposite steps to glue the base material, so that the rapid switching of two stations of the comma roller and the slot extrusion die head is realized, and the product operation convenience is improved.

Description

Duplex position coating machine convenient to switch

Technical Field

The utility model relates to the technical field of coating, in particular to a double-station coating machine convenient to switch.

Background

Coating technology is widely used for coating and compound processing with plastic film, paper, base materials such as electrochemical aluminium, and common coating modes include comma knife coating, roller transfer coating, slit coating and the like, wherein in the coating process of some base materials, the comma knife coating and the slit coating are required to be used for coating different positions of the same base material in sequence, so that a slit coating station and a comma knife coating station are often arranged in a stacked mode in one device, the mode is often inconvenient to switch stations, and meanwhile, when the comma knife coating works, the slit coating stays in the coating device, so that the cleaning is inconvenient, and meanwhile, the comma knife coating operation is easy to influence.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a double-station coater convenient to switch, which comprises:

a frame having two opposing wall panels;

the traction roller mechanism comprises a traction roller drive and a traction roller, wherein two ends of the traction roller are rotatably arranged on two wallboards, and the traction roller drive is arranged on one of the wallboards and is in transmission connection with one end of the traction roller;

the comma coating mechanism comprises two groups of height adjusting parts and a group of comma roller parts, the two groups of height adjusting parts are respectively arranged on the two wallboards, the comma roller parts are positioned above the traction roller, the two ends of the comma roller parts are fixed on the height adjusting parts, and the height adjusting parts drive the comma roller parts to be close to or far away from the traction roller; and

the slit coating mechanism comprises a trolley and a slit coating part, wherein the trolley is positioned on one side of the frame, the slit coating part is arranged on the trolley, the trolley is pushed, and the trolley drives the slit coating part to be close to or far away from the traction roller.

According to one embodiment of the present utility model, the slot coating portion includes two sets of sliding components and a slot extrusion die, the two sets of sliding components are disposed on the cart, and two ends of the slot extrusion die are respectively slidably disposed on the sliding components.

According to one embodiment of the utility model, each group of height adjusting parts comprises an adjusting driving part, an adjusting swing arm and a swing arm rotating shaft, wherein the adjusting driving part and the swing arm rotating shaft are fixed on the side wall of the wallboard, the adjusting swing arm is fixed on the swing arm rotating shaft and rotates along with the swing arm rotating shaft, one end of the adjusting swing arm is in transmission connection with the adjusting driving part, and two ends of the comma roller part are fixed on one ends of the two adjusting swing arms far away from the adjusting driving parts.

According to one embodiment of the utility model, the comma roller part comprises a cross arm assembly, a fixed adjusting assembly and a comma roller, wherein two ends of the comma roller and the cross arm assembly are respectively arranged at one ends of the two adjusting swing arms far away from the adjusting driving piece, two ends of the comma roller are rotatably connected with the adjusting swing arms, the cross arm assembly is positioned above the comma roller, one end of the fixed adjusting assembly is fixed to the cross arm assembly, and the other end of the fixed adjusting assembly faces the comma roller and is abutted against the comma roller.

According to an embodiment of the present utility model, the fixed adjustment assembly includes a first fixed adjustment assembly and a second fixed adjustment assembly, and the first fixed adjustment assembly and the second fixed adjustment assembly are respectively fixed on two opposite sides of the cross arm assembly, and both face and abut against the comma roller.

According to one embodiment of the utility model, the first fixed adjusting assembly comprises a first fixed seat, a first ejector rod and a first ejector block, wherein the first fixed seat is fixed on the cross arm assembly, the first ejector rod penetrates through and is rotatably arranged in the first fixed seat, two ends of the first ejector rod are exposed out of two opposite surfaces of the first fixed seat, one end of the first ejector block is in threaded connection with one end of the first ejector rod, the other end of the first ejector block faces towards and abuts against the comma roller, the other end of the first ejector rod is provided with a first adjusting head, and the first adjusting head is fixedly connected with the first ejector rod.

According to one embodiment of the utility model, the second fixed adjusting assembly comprises a second fixed seat, a second ejector rod and a second ejector block, wherein the second fixed seat is fixed on one surface of the cross arm assembly, which is opposite to the first fixed adjusting assembly, the second ejector rod penetrates through and is rotationally arranged in the second fixed seat, two ends of the second ejector rod are exposed out of two opposite surfaces of the second fixed seat, the second ejector block is in threaded connection with one end of the second ejector rod and is abutted against the comma roller, the other end of the second ejector rod is provided with a second adjusting head, and the second adjusting head is fixed on the second ejector rod.

According to an embodiment of the present utility model, the second top block further has an abutting cambered surface, the abutting cambered surface is disposed on a surface of the second top block facing the comma roller, the radian of the abutting cambered surface is consistent with the radian of the surface of the comma roller, and the abutting cambered surface abuts against the comma roller.

According to the utility model, the slit extrusion part is arranged on the trolley, when the slit extrusion part is used, the comma roller part is lifted by the height adjusting part, the trolley is pushed into the trolley to enable the slit extrusion part to be close to the traction roller for gluing the substrate on the traction roller, when comma coating is needed, the trolley is pushed out to enable the slit extrusion part to be far away from the traction roller, and simultaneously the height adjusting part pulls the comma roller to be close to the traction roller and gluing the substrate on the traction roller, so that the rapid switching of two stations of the comma roller and the slit extrusion die head is realized, the product operation convenience is improved, when the slit extrusion die head is needed to be cleaned, the trolley is pushed out and offline cleaning is performed, the slit extrusion die head is not needed to be stopped and the convenience of product use is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

FIG. 1 is a schematic diagram of a dual station coater for facilitating switching in an embodiment;

FIG. 2 is a schematic diagram of the slot coating removal mechanism of FIG. 1;

FIG. 3 is a schematic diagram of a slot coating mechanism according to an embodiment;

FIG. 4 is a schematic view of a height adjusting section in the embodiment;

FIG. 5 is a schematic diagram of a comma roller and fixed adjustment assembly in an embodiment;

FIG. 6 is a schematic cross-sectional view of a comma roller mated with a fixed adjustment assembly in an embodiment;

fig. 7 is a schematic diagram of an exploded view of a fixed adjustment assembly in an embodiment.

Reference numerals illustrate:

1. a frame; 11. a wallboard;

2. a pull roll mechanism; 21. a traction roller drive; 22. a traction roller;

3. comma coating means; 31. a height adjusting section; 311. adjusting the driving member; 312. adjusting a swing arm; 313. a swing arm rotating shaft; 32. comma roller part; 321. a cross arm assembly; 322. fixing the adjusting component; 3221. a first fixed adjustment assembly; 32211. a first fixing seat; 32212. a first ejector rod; 322121, first adjustment head; 32213. a first top block; 32214. a locking member; 3222. a second fixed adjustment assembly; 3221. the second fixing seat; 32222. a second ejector rod; 322221, a second adjustment head; 32223. a second top block; 322231, abutting against the cambered surface; 323. comma roller; 3231. a scraper;

4. a slit coating mechanism; 41. a cart; 42. a slit coating section; 421. a sliding assembly; 422. a slot extrusion die.

Detailed Description

Various embodiments of the utility model are disclosed in the following drawings, in which details of the practice are set forth in the following description for the purpose of clarity. However, it should be understood that these practical details are not to be taken as limiting the utility model. That is, in some embodiments of the utility model, these practical details are unnecessary. Moreover, for the purpose of simplifying the drawings, some conventional structures and components are shown in the drawings in a simplified schematic manner.

In addition, the descriptions of the "first," "second," and the like, herein are for descriptive purposes only and are not intended to be specifically construed as order or sequence, nor are they intended to limit the utility model solely for distinguishing between components or operations described in the same technical term, but are not to be construed as indicating or implying any relative importance or order of such features. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Referring to fig. 1-3, fig. 1 is a schematic diagram of a dual-station coater for easy switching in the embodiment, fig. 2 is a schematic diagram of a slit coating removal mechanism in fig. 1, and fig. 3 is a schematic diagram of a slit coating mechanism in the embodiment. In the embodiment, the double-station coating machine convenient to switch comprises a frame 1, a traction roller mechanism 2, a comma coating mechanism 3 and a slit coating mechanism 4, wherein both ends of the traction roller mechanism 2 and the comma coating mechanism 3 are arranged on the frame 1, the comma coating mechanism 3 is positioned above the traction roller mechanism 2, the slit coating mechanism 4 is arranged on one side of the frame 1 and faces one side of the traction roller mechanism 2, a substrate is wound on the traction roller mechanism 2, the traction roller mechanism 2 unwinds the substrate by rotating the traction substrate, and meanwhile, the comma coating mechanism 3 and the slit coating mechanism 3 can be sequentially switched to coat the substrate.

Specifically, the frame 1 has two opposite wallboards 11, the pull roll mechanism 2 includes pull roll driving 21 and pull roll 22, the pull roll 22 both ends rotate and locate on two wallboards 11, pull roll driving 21 locates on one wallboard 11 and is connected with one of them one end transmission of pull roll 22, the substrate is around locating pull roll 22 surface, pull roll driving 21 drives pull roll 22 to rotate so that pull roll 22 pulls the substrate unreels.

Comma coating mechanism 3 includes two high adjustment portion 31 and a set of comma roller portion 32, and two surfaces that two wallboard 11 are relative are located to two sets of high adjustment portion 31, and comma roller portion 32 is located the top of pull roll 22 and the fixed high adjustment portion 31 in both ends, and high adjustment portion 31 can drive comma roller portion 32 to be close to or keep away from pull roll 22.

The slit coating mechanism 4 includes a cart 41 and a slit coating portion 42, wherein the cart 41 is located at one side of the frame 1, and the cart 41 can be pushed to move so that the slit coating portion 42 faces the pull roller mechanism 2 side.

When the slit coating is required, the height adjusting part 31 lifts the comma roller part 32 away from the pull roller 22, and pushes the trolley 42 to move the slit coating part 32 towards the pull roller 22 and close to the pull roller 22, so that the slit coating part 32 can coat the substrate positioned on the surface of the pull roller 22. When comma coating is required, the trolley 41 is pushed out to enable the slit coating portion 42 to be far away from the traction roller 22, meanwhile, under the driving of the height adjusting portion 31, the comma roller portion 32 moves towards the traction roller 22 to be close to the traction roller 22, so that the comma roller portion 32 can coat the traction roller 22, the quick switching of two stations is realized, the convenience of product operation is improved, the time of shutdown switching is saved, in addition, when the slit coating portion 42 is required to be cleaned, the trolley 41 can be directly pushed out to clean the slit coating portion 42, cleaning can be completed without disassembling the slit coating portion 42, and the convenience of product maintenance is improved.

Referring back to fig. 3, preferably, the slot coating portion 42 includes a sliding assembly 421 and a slot extrusion die 422, the sliding assembly 421 is provided with two groups, the two groups of sliding assemblies 421 are disposed on the cart 41, two ends of the slot extrusion die 422 are respectively slidably disposed on one sliding assembly 421, when the cart 421 is pushed to be close to the pull roll 22, the slot extrusion die 422 can be made to be close to or far from the pull roll 22 by adjusting the sliding assemblies 421, so that the slot extrusion die 422 can be finely adjusted, and in particular, a driving component can be disposed on the cart 41 to drive the slot extrusion die 422 to move on the sliding assembly 421.

Referring to fig. 4, and referring back to fig. 1-2, fig. 4 is a schematic view of a height adjusting portion according to an embodiment. As shown in the figure, each group of height adjusting parts 31 comprises an adjusting driving piece 311, an adjusting swing arm 312 and a swing arm rotating shaft 313, wherein the adjusting driving piece 311 and the swing arm rotating shaft 313 are arranged on the side wall of the wallboard 11, the adjusting swing arm 312 is fixed on the swing arm rotating shaft 313 and rotates along with the swing arm rotating shaft 313, one end of the adjusting swing arm 312 is in transmission connection with the adjusting driving piece 311, and two ends of the comma roller part 32 are respectively connected with the other ends of the adjusting swing arms 312 in the two groups of height adjusting parts 31.

When the adjusting driving piece 311 lifts one end of the adjusting swing arm 312, the other end of the adjusting swing arm 312 sinks along with the one end of the adjusting swing arm 312, at this time, the comma roller portion 32 moves towards the traction roller 22, when the adjusting driving piece 311 pulls one end of the adjusting swing arm 312 to sink, the other end of the adjusting swing arm is lifted along with the one end of the adjusting swing arm, at this time, the comma roller portion 32 is lifted far away from the traction roller 22, and then the lifting function of the comma roller portion 32 is achieved.

Referring back to fig. 4, further, the comma roller portion 32 includes a cross arm assembly 321, a fixed adjusting assembly 322 and a comma roller 323, two ends of the cross arm assembly 321 and the comma roller 323 are respectively disposed at two ends of the adjusting swing arm 312, which are far away from one end of the adjusting driving member 311, and two ends of the comma roller 323 are rotationally connected with the adjusting swing arm 312, and the cross arm assembly 321 is disposed above the comma roller 323 and parallel to the comma roller 323, one end of the fixed adjusting assembly 322 is fixed to the cross arm assembly 321, and the other end faces towards and abuts against the comma roller 323.

In this example, the comma roller 323 can be a comma scraper roller in the prior art, the surface of the comma roller 323 is provided with two opposite scrapers 3231, one scraper 3231 of the comma roller 323 faces the traction roller 22, the other scraper 3231 faces away from the traction roller 22 and is abutted with the fixed adjusting component 322, so that the comma roller 323 is prevented from rotating during operation, when one scraper 3231 is worn and needs to be replaced to the other scraper 3231, the fixed adjusting component 322 is adjusted so that the fixed adjusting component 322 releases the abutment to the comma roller 323, the two scrapers 3231 are simultaneously rotated by 180 degrees by the rear comma roller 323, and the fixed adjusting component 322 is abutted with the comma roller 323 to limit the rotation in the opposite steps.

Referring to fig. 5-7 and referring back to fig. 4, fig. 5 is a schematic structural diagram of a comma roller and a fixed adjusting component in an embodiment, fig. 6 is a schematic structural diagram of a cross section of the comma roller and the fixed adjusting component in an embodiment, and fig. 7 is a schematic explosive structural diagram of the fixed adjusting component in an embodiment. Further, the fixed adjusting assembly 322 includes a first fixed adjusting assembly 3221 and a second fixed adjusting assembly 3222, and the first fixed adjusting assembly 3221 and the second fixed adjusting assembly 3222 are respectively fixed on two opposite sides of the cross arm assembly 321 and are abutted against the comma roller 323.

Specifically, the first fixed adjusting assembly 3221 includes a first fixing base 32211, a first ejector rod 32212 and a first ejector block 32213, the first fixing base 32211 is fixed on the cross arm 3211, the first ejector rod 32212 penetrates through and rotates in the fixing base 32211, two ends of the first ejector rod 322are exposed out of two opposite sides of the fixing base 32211, one end of the first ejector block 32213 is in threaded connection with one end of the first ejector rod 32212, the other end of the first ejector block 32213 faces towards and abuts against the comma roller 323, the other end of the first ejector rod 32212 is provided with a first adjusting head 322121, the first adjusting head 322121 is fixedly connected with the first ejector rod 32212, the cross section of the first adjusting head 322121 is a quadrilateral, during specific implementation, a wrench can be used for adjusting the first adjusting head 322121, the first ejector rod 32212 rotates, and when the first ejector block 32213 abuts against the comma roller 323 or is far away from the comma roller 323, and when the first ejector block 32213 abuts against the comma roller 323, the side wall of the first ejector block 32213 abuts against one of the doctor 3231.

Preferably, the first fixed adjusting assembly 3221 is further provided with a locking member 32214, the locking member 32214 is sleeved on the outer surface of the first top rod 32212 and located between the first fixed seat 32211 and the first top block 32213, and in practical implementation, the locking member 32214 may be an open clamping block in the prior art, and the locking member 32214 is used to limit the rotation of the first top rod 32212 so as to prevent the first top rod 32212 from reversing, thereby maintaining the stability of the abutment of the first top block 32213.

Further, the second fixed adjusting assembly 3222 includes a second fixed base 32221, a second ejector rod 32222 and a second ejector block 32223, the second fixed base 32221 is fixed on one surface of the cross arm 3221 opposite to the first fixed adjusting assembly 3222, the second ejector rod 32222 penetrates through and rotates in the second fixed base 32211, two ends of the second ejector rod 3222 are exposed out of two opposite surfaces of the second fixed base 32211, the second ejector block 32223 is in threaded connection with one end of the second ejector rod 32222 and abuts against the comma roller 323, the other end of the second ejector rod 32222 is provided with a second adjusting head 322221, the second adjusting head 322221 is fixed on the second ejector rod 32222, the cross section of the second adjusting head 322221 is polygonal, in this example, the shape of the second adjusting head is consistent with that of the first adjusting head 322121, that is, the cross section of the second adjusting head 322221 is quadrilateral, during adjusting, a wrench is also adopted to rotate the second adjusting head 322221 to rotate the second ejector rod 32222, the second ejector block 32223 abuts against the comma roller 323 or is far away from the comma roller 323, the second ejector block 32223 abuts against the comma roller 323, and the comma roller 323 abuts against the comma roller 323 when the second ejector block 322221 abuts against the comma roller 323, thereby preventing the comma roller from being affected by the comma roller 323.

That is, when the process works, the substrate is wound on the surface of the pull roll 22, the pull roll 21 drives the pull roll 22 to rotate so as to pull the substrate to unwind, at this time, if slit coating is required, the adjusting driving piece 311 is started to pull the adjusting swing arm 312 so as to lift the comma roll 323, then the trolley 41 is pushed towards the pull roll 22 until the slit extrusion die 422 is close to the pull roll 22, the slit extrusion die 422 extrudes the coating to the substrate for gluing, when the comma coating process is required, the trolley 41 is pushed out so that the slit extrusion die 422 is far away from the pull roll 22, and meanwhile, the adjusting driving piece 311 is started to drive the adjusting swing arm 312 so as to enable the comma roll 323 to be close to the pull roll 22 and glue the substrate on the pull roll 22, so that the rapid switching of two stations of the comma roll 323 and the slit extrusion die 422 is realized, the product operation convenience is improved, when the slit extrusion die 422 is required to be cleaned, the trolley 41 is pushed out and cleaned off, the slit extrusion die 422 is not required to be disassembled, and the convenience of product use is improved.

The foregoing is merely exemplary of the present utility model and is not intended to limit the present utility model. Various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of the present utility model, should be included in the scope of the claims of the present utility model.

Claims (8)

1. Double-station coater convenient to switch, which is characterized by comprising:

a frame (1) having two opposite wall panels (11);

the traction roller mechanism (2) comprises a traction roller drive (21) and a traction roller (22), wherein two ends of the traction roller (22) are rotatably arranged on two wallboards (11), and the traction roller drive (21) is arranged on one wallboard (11) and is in transmission connection with one end of the traction roller (22);

comma coating mechanism (3), including two sets of high adjusting part (31) and a set of comma roller portion (32), two sets of high adjusting part (31) are located respectively two wallboard (11), just comma roller portion (32) are located draw roll (22) top, and both ends are fixed in high adjusting part (31), high adjusting part (31) drive comma roller portion (32) are close to or keep away from draw roll (22); and

the slit coating mechanism (4) comprises a trolley (41) and a slit coating portion (42), wherein the trolley (41) is located on one side of the frame (1), the slit coating portion (42) is arranged on the trolley (41), the trolley (41) is pushed, and the trolley (41) drives the slit coating portion (42) to be close to or far away from the traction roller (22).

2. The double-station coater according to claim 1, wherein the slot coating portion (42) comprises two groups of slide assemblies (421) and two groups of slot extrusion dies (422), the two groups of slide assemblies (421) are arranged on the cart (41), and two ends of the slot extrusion dies (422) are respectively arranged on the slide assemblies (421) in a sliding manner.

3. The double-station coater convenient to switch according to claim 1, wherein each group of the height adjusting parts (31) comprises an adjusting driving part (311), an adjusting swing arm (312) and a swing arm rotating shaft (313), the adjusting driving part (311) and the swing arm rotating shaft (313) are fixed on the side wall of the wallboard (11), the adjusting swing arm (312) is fixed on the swing arm rotating shaft (313) and rotates along with the swing arm rotating shaft (313), one end of the adjusting swing arm (312) is in transmission connection with the adjusting driving part (311), and two ends of the comma roller part (32) are fixed on one end of the adjusting swing arm (312) far away from the adjusting driving part (311).

4. The double-station coater convenient to switch according to claim 3, wherein the comma roller portion (32) comprises a cross arm assembly (321), a fixed adjusting assembly (322) and comma rollers (323), two ends of the comma rollers (323) and the cross arm assembly (321) are respectively arranged at one ends of the two adjusting swing arms (312) away from the adjusting driving piece (311), two ends of the comma rollers (323) are rotationally connected with the adjusting swing arms (312), the cross arm assembly (321) is arranged above the comma rollers (323), one end of the fixed adjusting assembly (322) is fixed on the cross arm assembly (321), and the other end of the fixed adjusting assembly is oriented to the comma rollers (323) and is abutted to the comma rollers (323).

5. The double-station coater according to claim 4, wherein the fixed adjusting assembly (322) comprises a first fixed adjusting assembly (3221) and a second fixed adjusting assembly (3222), and the first fixed adjusting assembly (3221) and the second fixed adjusting assembly (3222) are respectively fixed on two opposite sides of the cross arm assembly (321) and face and abut against the comma roller (323).

6. The dual-station coater according to claim 5, wherein the first fixed adjusting assembly (3221) comprises a first fixing seat (32211), a first ejector rod (32212) and a first ejector block (32213), the first fixing seat (32211) is fixed in the cross arm assembly (321), the first ejector rod (32212) penetrates and rotates to be arranged in the first fixing seat (32211), two ends of the first ejector rod are exposed out of two opposite sides of the first fixing seat (32211), one end of the first ejector block (32213) is in threaded connection with one end of the first ejector rod (32212), the other end of the first ejector block (32213) faces and abuts against the comma roller (323), and the other end of the first ejector rod (32212) is provided with a first adjusting head (322121), and the first adjusting head (322121) is fixedly connected with the first ejector rod (32212).

7. The dual-station coater according to claim 5, wherein the second fixed adjusting assembly (3222) comprises a second fixing seat (32221), a second ejector rod (32222) and a second ejector block (32223), the second fixing seat (32221) is fixed on one surface of the cross arm assembly (321) opposite to the first fixed adjusting assembly (3221), the second ejector rod (32222) penetrates through and rotates in the second fixing seat (32221), two ends of the second ejector rod are exposed out of two opposite surfaces of the second fixing seat (32221), the second ejector block (32223) is in threaded connection with one end of the second ejector rod (32222) and abuts against the comma roller (323), the other end of the second ejector rod (32222) is provided with a second adjusting head (322221), and the second adjusting head (322221) is fixed on the second ejector rod (32222).

8. The double-station coater convenient to switch according to claim 7, wherein the second top block (32223) further has an abutting cambered surface (322231), the abutting cambered surface (322231) is arranged on one surface of the second top block (32223) facing the comma roller (323), the abutting cambered surface (322231) is in radian consistency with the surface of the comma roller (323), and the abutting cambered surface (322231) abuts against the comma roller (323).