Rapid cloth guide device for cloth plaiting machine

Abstract

The utility model relates to the technical field of cloth plaiting machines, and discloses a rapid cloth guiding device for a cloth plaiting machine, the rapid cloth guiding device comprises a cloth plaiting machine body and a cloth guiding mechanism arranged on the cloth plaiting machine body, a cloth collecting groove is formed in the right side of the top of the cloth plaiting machine body, and a first rectangular groove is formed in the inner wall of the rear side of the cloth collecting groove; the cloth guide mechanism comprises an electric guide rail fixedly installed on the inner wall of the rear side of the first rectangular groove, an electric sliding seat is slidably installed on the electric guide rail, a first cloth guide roller and two cloth plaiting rollers are rotatably installed on the front side wall of the electric sliding seat, and the first cloth guide roller is located on the lower left portion of the cloth plaiting rollers. A cloth wrinkle removing assembly located between the first cloth guide roller and the cloth plaiting roller is arranged on the front side of the electric sliding base. Compared with the prior art, the cloth wrinkle removing device has the following advantages and effects that in the cloth stacking process, opposite acting force can be applied to the upper surface and the lower surface of cloth through the cloth wrinkle removing assembly, the cloth is efficiently smoothed, wrinkles on the cloth are removed, and the cloth stacking quality is greatly improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of cloth folding machines, in particular to a quick cloth guiding device for a cloth folding machine. BACKGROUND

[0002] In the production and processing process of the textile and garment industries, the cloth folding machine undertakes the important task of neatly folding cloth, and is a key equipment for ensuring the orderly development of subsequent processing of cloth. With the continuous improvement of market requirements for cloth product quality and production efficiency, the performance optimization of the cloth folding machine has become the focus of the industry, and the performance of the cloth guiding device directly affects the cloth conveying effect and folding quality. According to the search, the patent document with the authorization announcement No. CN213894595U discloses a quick cloth guiding device for a cloth folding machine, which comprises a cloth folding machine, a rack, a cloth guiding frame, a mandrel, a cloth winding on the mandrel, the cloth folding machine comprising a machine body, a conveying chain, a cloth folding mechanism, a driving motor, a pressing plate, the cloth guiding frame being provided with a cloth guiding assembly on the side close to the cloth folding machine, the cloth guiding assembly comprising a plurality of sensing columns, a rotating rod hinged to the inner side of the sensing disc of the cloth guiding frame, and a guide rod connected vertically between the two rotating rods, the guide rod being perpendicular to the cloth conveying direction and located below the cloth, the sensing column controlling the driving motor to drive the cloth folding mechanism to make linear reciprocating motion; when the rotating rod reaches the position of the sensing column, the sensing column controls the cloth folding mechanism to make linear reciprocating motion, at the same time, the guide rod can also pull the rotation of the mandrel to make the cloth on the mandrel conveying when it is downwardly rotated due to gravity, having the effects of high working efficiency and cloth guiding and pulling integration.

[0003] The above scheme is found to still have at least the following disadvantages in actual use: in the process of folding cloth, the processing capacity for cloth wrinkles is limited, and there is a lack of structure for effectively removing wrinkles on the surface of cloth, usually only relying on simple roller pressing method for flattening, which cannot effectively remove complex wrinkles generated in the production process of cloth, so that the quality of folded cloth is difficult to meet the high standard requirements.

[0004] Therefore, we propose a quick cloth guiding device for a cloth folding machine to solve the above problems. Invention content

[0005] The purpose of the present application is to provide a quick cloth guiding device for a cloth folding machine, which can apply opposite forces to the upper and lower surfaces of the cloth, efficiently flatten the cloth, remove wrinkles on the cloth, and greatly improve the quality of cloth stacking and folding.

[0006] The above technical purpose of the application is achieved by the following technical scheme: a quick cloth guiding device for a cloth folding machine, comprising a cloth folding machine body and a cloth guiding mechanism arranged on the cloth folding machine body, a cloth collecting groove is formed on the top right side of the cloth folding machine body, a rectangular groove one is formed on the inner wall of the rear side of the cloth collecting groove, the cloth guiding mechanism comprises an electric guide rail fixedly installed on the inner wall of the rear side of the rectangular groove one, an electric sliding seat is slidingly installed on the electric guide rail, a cloth guiding roller one and two cloth folding rollers are rotatably installed on the front side wall of the electric sliding seat, the cloth guiding roller one is located below the left of the cloth folding rollers, a cloth wrinkle removing assembly is arranged between the cloth guiding roller one and the cloth folding rollers on the front side of the electric sliding seat, the cloth wrinkle removing assembly comprises an upper cross beam and a lower cross beam fixedly installed on the front side wall of the electric sliding seat, two connecting plates are fixedly installed between the upper cross beam and the lower cross beam, an upper cross shaft and a lower cross shaft are slidingly installed between the two connecting plates, a plurality of wrinkle removing rings are fixedly sleeved on the upper cross shaft and the lower cross shaft, the two ends of the upper cross shaft and the two ends of the lower cross shaft respectively penetrate through the corresponding connecting plates, and the two ends of the upper cross shaft and the two ends of the lower cross shaft are fixedly installed with push plates, one side of each of the four push plates is fixedly installed with a spring, and one end of each of the four springs is fixedly connected with the corresponding connecting plate.

[0007] By adopting the above technical scheme, the positions of the cloth guiding roller one and the two cloth folding rollers can be flexibly adjusted by the sliding connection of the electric sliding seat on the electric guide rail, the cloth can be quickly guided and accurately conveyed, and the working efficiency of the cloth folding machine and the neatness of the cloth folding can be improved.

[0008] The application further provides that the cloth wrinkle removing assembly further comprises a motor one fixedly installed on the top front side of the upper cross beam, a drive shaft one is fixedly installed on the output shaft end of the motor one, and a cam one is fixedly installed on the bottom end of the drive shaft one and in contact with the push plate located above the front side.

[0009] By adopting the above technical scheme, the motor one is used to control the rotation of the drive shaft one and the cam one, and the springs at the two ends of the upper cross shaft are contacted with the push plate, so that the upper cross shaft and the wrinkle removing rings fixedly sleeved thereon can be periodically pushed to move horizontally and reciprocally, and the wrinkles on the upper surface of the cloth can be smoothed.

[0010] The application further provides that a mounting hole one is formed on the top front side of the upper cross beam, and the drive shaft one penetrates through the mounting hole one in rotation through a bearing.

[0011] By adopting the above technical scheme, the stability of the rotation of the drive shaft one is ensured.

[0012] The application further provides that the cloth wrinkle removing assembly further comprises a motor two fixedly installed on the bottom rear side of the lower cross beam, a drive shaft two is fixedly installed on the output shaft end of the motor two, and a cam two is fixedly installed on the top end of the drive shaft two and in contact with the push plate located below the rear side.

[0013] By adopting the above technical scheme, the motor two is used for controlling the rotation of the second driving shaft and the cam two, and cooperates with the springs at the two ends of the lower cross shaft to periodically push the lower cross shaft and the wrinkle removing ring fixedly sleeved thereon to move horizontally and reciprocally, so as to smooth the wrinkles on the lower surface of the cloth.

[0014] Further, the bottom rear side of the lower cross beam is provided with a mounting hole two, and the second driving shaft penetrates through the mounting hole two and rotates through a bearing.

[0015] By adopting the above technical scheme, the stability of the rotation of the second driving shaft is ensured.

[0016] Further, the collecting groove is provided with a connecting shaft located at the right side of the rectangular groove one, a plurality of evenly distributed plate clamps are fixedly sleeved on the connecting shaft, and the same pressing plate is fixedly clamped on the plurality of plate clamps. A motor three is fixedly installed on the front outer wall of the cloth folding machine body, and the output shaft end of the motor three is fixedly connected with the front end of the connecting shaft.

[0017] By adopting the above technical scheme, under the driving of the motor three, the rotation of the connecting shaft can be controlled, and the inclination angle of the pressing plate can be adjusted. The cloth to be folded can be pressed and fixed by the pressing plate, so that the cloth folding operation is facilitated, and the cloth is prevented from loosening.

[0018] Further, the front inner wall of the collecting groove is provided with a rectangular groove two, a guide rod is fixedly installed in the rectangular groove two, a guide seat is slidably sleeved on the guide rod, and the front end of the guide roller one, the front ends of the two cloth folding rollers, the front end of the upper cross beam and the front end of the lower cross beam are fixedly connected with the rear side wall of the guide seat.

[0019] By adopting the above technical scheme, the design of the guide rod and the guide seat provides stable guide support for the cloth guiding mechanism, and further ensures the stability and accuracy of the cloth guiding process.

[0020] Further, a support frame is fixedly installed on the top of the cloth folding machine body and located at the left side of the collecting groove, three guide rollers two are rotatably installed in the support frame, and the three guide rollers two are arranged in a V shape.

[0021] By adopting the above technical scheme, the three guide rollers two arranged in a V shape are designed to guide the cloth to be transported to the direction of the cloth guiding mechanism, optimize the transmission path of the cloth, make the cloth bear uniform force in the transmission process, reduce the friction between the cloth and the equipment, reduce the risk of cloth damage, and help to improve the smoothness of cloth transmission.

[0022] Further, the outer surface of the wrinkle removing ring is a smooth surface structure.

[0023] By adopting the above technical scheme, when the cloth contacts the wrinkle removing ring, the surface of the cloth can be prevented from being damaged.

[0024] Further, the two connecting plates are provided with two sliding holes on one side, and the two ends of the upper horizontal shaft and the two ends of the lower horizontal shaft are respectively slidably penetrated through the corresponding sliding holes.

[0025] By adopting the above technical scheme, the smooth movement of the upper horizontal shaft and the lower horizontal shaft is ensured.

[0026] The present application includes at least one of the following beneficial technical effects:

[0027] The present application can apply opposite forces to the upper and lower surfaces of the cloth during the stacking and stacking of the cloth, efficiently flatten the cloth, remove the wrinkles on the cloth, and greatly improve the quality of the stacked cloth. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a three-dimensional structural schematic diagram of the first perspective of the present embodiment.

[0029] Figure 2 is a three-dimensional structural schematic diagram of the second perspective of the present embodiment.

[0030] Figure 3 is a three-dimensional structural schematic diagram of the present embodiment.

[0031] Figure 4 is a three-dimensional structural schematic diagram of the cloth wrinkle removing assembly.

[0032] In the figure, 1 is a cloth stacking machine body; 2 is a cloth collecting groove; 3 is a rectangular groove one; 4 is an electric guide rail; 5 is an electric sliding seat; 6 is a cloth guide roller one; 7 is a cloth stacking roller; 8 is a cloth wrinkle removing assembly; 801 is an upper beam; 802 is a lower beam; 803 is a connecting plate; 804 is an upper horizontal shaft; 805 is a lower horizontal shaft; 806 is a wrinkle removing ring; 807 is a push plate; 808 is a spring; 809 is a motor one; 810 is a drive shaft one; 811 is a cam one; 812 is a motor two; 813 is a drive shaft two; 814 is a cam two; 9 is a connecting shaft; 10 is a plate clamp; 11 is a cloth pressing plate; 12 is a motor three; 13 is a rectangular groove two; 14 is a guide rod; 15 is a guide seat; 16 is a support frame; 17 is a cloth guide roller two. DETAILED DESCRIPTION

[0033] The technical solutions of the present application will be described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0034] Reference Figure 1 , Figure 2、 Figure 3 and Figure 4 The application provides a rapid cloth guiding device for a cloth folding machine, which comprises a cloth folding machine body 1 and a cloth guiding mechanism arranged on the cloth folding machine body 1. A cloth collecting groove 2 is formed in the top right side of the cloth folding machine body 1, and a rectangular groove one 3 is formed in the inner wall of the rear side of the cloth collecting groove 2. The cloth guiding mechanism comprises an electric guide rail 4 fixedly installed on the inner wall of the rear side of the rectangular groove one 3. An electric sliding seat 5 is slidably installed on the electric guide rail 4. A cloth guiding roller one 6 and two cloth folding rollers 7 are rotatably installed on the front side wall of the electric sliding seat 5. The cloth guiding roller one 6 is located below and left of the cloth folding rollers 7. A cloth wrinkle removing assembly 8 is arranged on the front side of the electric sliding seat 5 and located between the cloth guiding roller one 6 and the cloth folding rollers 7. The cloth wrinkle removing assembly 8 comprises an upper cross beam 801 and a lower cross beam 802 fixedly installed on the front side wall of the electric sliding seat 5. Two connecting plates 803 are fixedly installed between the upper cross beam 801 and the lower cross beam 802. An upper cross shaft 804 and a lower cross shaft 805 are slidably installed between the two connecting plates 803. A plurality of wrinkle removing rings 806 are fixedly sleeved on the upper cross shaft 804 and the lower cross shaft 805 in a uniform distribution. The two ends of the upper cross shaft 804 and the two ends of the lower cross shaft 805 respectively penetrate through the corresponding connecting plates 803. Push plates 807 are fixedly installed at the two ends of the upper cross shaft 804 and the two ends of the lower cross shaft 805. Springs 808 are fixedly installed on one side of the four push plates 807. One end of the four springs 808 is fixedly connected with the corresponding connecting plate 803.

[0035] In the embodiment, the cloth wrinkle removing assembly 8 further comprises a motor one 809 fixedly installed on the top front side of the upper cross beam 801. A driving shaft one 810 is fixedly installed at the output shaft end of the motor one 809. A cam one 811 is fixedly installed at the bottom end of the driving shaft one 810. The cam one 811 is in contact with the push plate 807 located above the front side. The cloth wrinkle removing assembly 8 further comprises a motor two 812 fixedly installed on the bottom rear side of the lower cross beam 802. A driving shaft two 813 is fixedly installed at the output shaft end of the motor two 812. A cam two 814 is fixedly installed at the top end of the driving shaft two 813. The cam two 814 is in contact with the push plate 807 located below the rear side. The motor one 809 is used for controlling the rotation of the driving shaft one 810 and the cam one 811. In cooperation with the springs 808 at the two ends of the upper cross shaft 804, the upper cross shaft 804 and the wrinkle removing rings 806 fixedly sleeved thereon can be periodically pushed to move horizontally and reciprocally through the contact with the push plate 807. The motor two 812 is used for controlling the rotation of the driving shaft two 813 and the cam two 814. In cooperation with the springs 808 at the two ends of the lower cross shaft 805, the lower cross shaft 805 and the wrinkle removing rings 806 fixedly sleeved thereon can be periodically pushed to move horizontally and reciprocally through the contact with the push plate 807. The sliding directions of the upper cross shaft 804 and the lower cross shaft 805 are opposite, so that the upper and lower surfaces of the cloth can be subjected to the action force in the opposite directions, and the wrinkle of the cloth can be efficiently and comprehensively smoothed.

[0036] In this embodiment, the outer surface of the wrinkle removing ring 806 is smooth, and the fabric can be prevented from being damaged during the wrinkle removing process. Two sliding holes are formed on one side of the two connecting plates 803, and the upper horizontal shaft 804 and the lower horizontal shaft 805 are slidably penetrated through the corresponding sliding holes.

[0037] In this embodiment, the top front side of the upper cross beam 801 is provided with a mounting hole one, and the driving shaft one 810 is rotatably penetrated through the mounting hole one through a bearing. The bottom rear side of the lower cross beam 802 is provided with a mounting hole two, and the driving shaft two 813 is rotatably penetrated through the mounting hole two through a bearing. The design of the mounting hole one and the mounting hole two can ensure the stability of the rotation of the driving shaft one 810 and the driving shaft two 813.

[0038] In this embodiment, the connecting shaft 9 is rotatably installed in the rectangular groove one 3 on the right side of the cloth collecting groove 2. A plurality of evenly distributed plate clamps 10 are fixedly installed on the connecting shaft 9. The same cloth pressing plate 11 is fixedly clamped on the plurality of plate clamps 10. The motor three 12 is fixedly installed on the front outer wall of the cloth folding machine body 1. The output shaft end of the motor three 12 is fixedly connected with the front end of the connecting shaft 9.

[0039] In this embodiment, the rectangular groove two 13 is formed on the front inner wall of the cloth collecting groove 2. The guide rod 14 is fixedly installed in the rectangular groove two 13. The guide seat 15 is slidably sleeved on the guide rod 14. The front end of the cloth guide roller one 6, the front ends of the two cloth folding rollers 7, the front end of the upper cross beam 801 and the front end of the lower cross beam 802 are fixedly connected with the rear side wall of the guide seat 15. The guide cloth mechanism can be stably guided and supported, and the stability and accuracy of the cloth guiding process are further ensured.

[0040] In this embodiment, the support frame 16 is fixedly installed on the left side of the cloth collecting groove 2 on the top of the cloth folding machine body 1. The three cloth guide rollers two 17 are rotatably installed in the support frame 16 and arranged in a V shape.

[0041] Through the above structure, the quick cloth guiding device for the cloth folding machine provided by the present application can guide the produced cloth from the left side of the cloth folding machine body 1 through the three cloth guide rollers two 17 arranged in a V shape in the support frame 16, and continuously convey the cloth to the cloth guiding mechanism. The cloth can pass under the cloth guide roller one 6, then pass between the upper horizontal shaft 804 and the lower horizontal shaft 805, and then pass between the two cloth folding rollers 7 from above. By controlling the horizontal reciprocating sliding of the electric sliding seat 5 on the electric guide rail 4, the cloth guide roller one 6, the two cloth folding rollers 7 and the cloth wrinkle removing assembly 8 on the electric sliding seat 5 can be synchronously moved. The cloth guiding position and angle can be flexibly adjusted, and efficient cloth folding operation can be performed.

[0042] In the cloth conveying and cloth coding process, the cloth wrinkle removing assembly 8 plays a role in removing wrinkles from the cloth. By controlling the simultaneous operation of motor one 809 and motor two 812, motor one 809 drives the rotation of drive shaft one 810 and cam one 811. Due to the contact between cam one 811 and the front upper push plate 807, and the elastic force of the springs 808 at both ends of the upper horizontal shaft 804, the upper horizontal shaft 804 and the wrinkle removing ring 806 fixedly installed thereon can be periodically pushed to move horizontally and reciprocally. Motor two 812 controls the rotation of drive shaft two 813 and cam two 814. Due to the cooperation between cam two 814 and the lower rear push plate 807, and the elastic force of the springs 808 at both ends of the lower horizontal shaft 805, the lower horizontal shaft 805 and the wrinkle removing ring 806 fixedly installed thereon can be periodically pushed to move horizontally and reciprocally, and the sliding directions of the upper horizontal shaft 804 and the lower horizontal shaft 805 can be opposite. By applying opposite forces to the upper and lower surfaces of the cloth, the cloth can be efficiently smoothed, the wrinkles on the cloth can be removed, and the cloth can be prevented from being damaged.

[0043] The cloth that has undergone wrinkle removing treatment is further guided by the cloth guide roller one 6 and the two cloth coding rollers 7, conveyed to the cloth collecting groove 2, and cooperates with the use of the pressing plate 11 to realize the orderly collection and stacking of the cloth.

Claims

1. A quick cloth guiding device for a cloth weaving machine, characterized in that, The utility model provides a cloth folding machine, including cloth folding machine body (1) and cloth guide mechanism set up on cloth folding machine body (1), the top right side of cloth folding machine body (1) is equipped with cloth collecting groove (2), the backside inner wall of cloth collecting groove (2) is equipped with rectangular groove no.

2. The rapid cloth guiding device for the cloth beaming machine according to claim 1, characterized in that: The cloth folding machine further comprises a cloth wrinkle removing assembly (8) arranged between the cloth guide roller (6) and the cloth folding roller (7) on the front side of the electric sliding seat (5), the cloth wrinkle removing assembly (8) comprises an upper cross beam (801) and a lower cross beam (802) fixedly arranged on the front side wall of the electric sliding seat (5), two connecting plates (803) are fixedly arranged between the upper cross beam (801) and the lower cross beam (802), an upper cross shaft (804) and a lower cross shaft (805) are slidably arranged between the two connecting plates (803), a plurality of wrinkle removing rings (806) are fixedly arranged on the upper cross shaft (804) and the lower cross shaft (805) in a uniform distribution, the two ends of the upper cross shaft (804) and the two ends of the lower cross shaft (805) respectively penetrate through the corresponding connecting plates (803), a push plate (807) is fixedly arranged at the two ends of the upper cross shaft (804) and the two ends of the lower cross shaft (805), a spring (808) is fixedly arranged on one side of each of the four push plates (807), and one end of each of the four springs (808) is fixedly connected with the corresponding connecting plate (803).

3. The rapid guide device for a fabric warper according to claim 2, characterized in that: The cloth folding machine further comprises a cloth wrinkle removing assembly (8) arranged between the cloth guide roller (6) and the cloth folding roller (7) on the front side of the electric sliding seat (5), the cloth wrinkle removing assembly (8) comprises an upper cross beam (801) and a lower cross beam (802) fixedly arranged on the front side wall of the electric sliding seat (5), two connecting plates (803) are fixedly arranged between the upper cross beam (801) and the lower cross beam (802), an upper cross shaft (804) and a lower cross shaft (805) are slidably arranged between the two connecting plates (803), a plurality of wrinkle removing rings (806) are fixedly arranged on the upper cross shaft (804) and the lower cross shaft (805) in a uniform distribution, the two ends of the upper cross shaft (804) and the two ends of the lower cross shaft (805) respectively penetrate through the corresponding connecting plates (803), a push plate (807) is fixedly arranged at the two ends of the upper cross shaft (804) and the two ends of the lower cross shaft (805), a spring (808) is fixedly arranged on one side of each of the four push plates (807), and one end of each of the four springs (808) is fixedly connected with the corresponding connecting plate (803).

4. The rapid guide device for the cloth beater according to claim 1, characterized in that: The cloth folding machine further comprises a cloth wrinkle removing assembly (8) arranged between the cloth guide roller (6) and the cloth folding roller (7) on the front side of the electric sliding seat (5), the cloth wrinkle removing assembly (8) comprises an upper cross beam (801) and a lower cross beam (802) fixedly arranged on the front side wall of the electric sliding seat (5), two connecting plates (803) are fixedly arranged between the upper cross beam (801) and the lower cross beam (802), an upper cross shaft (804) and a lower cross shaft (805) are slidably arranged between the two connecting plates (803), a plurality of wrinkle removing rings (806) are fixedly arranged on the upper cross shaft (804) and the lower cross shaft (805) in a uniform distribution, the two ends of the upper cross shaft (804) and the two ends of the lower cross shaft (805) respectively penetrate through the corresponding connecting plates (803), a push plate (807) is fixedly arranged at the two ends of the upper cross shaft (804) and the two ends of the lower cross shaft (805), a spring (808) is fixedly arranged on one side of each of the four push plates (807), and one end of each of the four springs (808) is fixedly connected with the corresponding connecting plate (803).

5. The rapid guide device for the cloth beater according to claim 4, characterized in that: ​ 6. The rapid guide device for a fabric warper according to claim 1, characterized in that: The connecting shaft (9) is fixedly installed on the right side of the rectangular groove I (3) in the cloth collecting groove (2), a plurality of evenly distributed plate clamps (10) are fixedly sleeved on the connecting shaft (9), a same cloth pressing plate (11) is fixedly clamped on the plurality of plate clamps (10), a motor three (12) is fixedly installed on the front side outer wall of the cloth folding machine body (1), and the output shaft end of the motor three (12) is fixedly connected with the front end of the connecting shaft (9).

7. The rapid guide device for the cloth beaming machine according to claim 1, characterized in that: A rectangular groove II (13) is formed in the front side inner wall of the cloth collecting groove (2), a guide rod (14) is fixedly installed in the rectangular groove II (13), a guide seat (15) is slidably sleeved on the guide rod (14), and the front end of the cloth guide roller I (6), the front ends of the two cloth folding rollers (7), the front end of the upper cross beam (801) and the front end of the lower cross beam (802) are fixedly connected with the rear side wall of the guide seat (15).

8. The rapid guide device for the cloth beaming machine according to claim 1, characterized in that: A support frame (16) is fixedly installed on the top of the cloth folding machine body (1) and located on the left side of the cloth collecting groove (2), three cloth guide rollers II (17) are rotatably installed in the support frame (16), and the three cloth guide rollers II (17) are arranged in a V shape.

9. The rapid guide device for a fabric warper according to claim 1, characterized in that: The outer surface of the wrinkle removing ring (806) is a smooth surface structure.

10. The rapid guide device for a fabric warper according to claim 1, characterized in that: Two slide holes are formed in one side of the two connecting plates (803), and the two ends of the upper cross shaft (804) and the two ends of the lower cross shaft (805) slidably penetrate through the corresponding slide holes.

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