Heat shrink packaging machine for ion exchange resin release film

Abstract

The invention relates to the technical field of heat shrink packaging, in particular to an ion exchange resin release film heat shrink packaging machine which comprises a main body plate, and a rotary edge sealing mechanism for conducting upper end heat sealing on an ion exchange resin surface isolation film is arranged at the upper end of the main body plate. The rotary edge sealing mechanism comprises two first limiting grooves symmetrically formed in the side face of the main body plate, and the upper end of the main body plate is provided with a rotary film covering mechanism for conducting film winding on the resin surface; a second electric telescopic rod drives two second fixing bodies to move to the upper end of the isolating membrane, then a double-shaft electric telescopic rod shrinks to drive two rolling wheels to make contact with the isolating membrane inwards at the same time, then a battery drives a heating piece to conduct heating, and therefore heat sealing is conducted on the isolating membrane at the upper end, and the upper portion of arc-shaped resin is tightly attached and covered with a film.

Description

Technical Field

[0001] The invention relates to the technical field of heat shrink packaging, in particular to a film-separating heat shrink packaging machine for ion exchange resin. Background Art

[0002] Heat shrink packaging is a common packaging technology, mainly used to protect products, improve the appearance of products and facilitate transportation. Its core principle is to use special heat shrink materials to shrink the packaging materials and fit them tightly to the products under heating conditions. Ion exchange resin is a functional polymer material with ion exchange properties. It is widely used in water treatment, chemical, pharmaceutical, food and other fields. The existing ion exchange resin is generally fixed on the inside of a square frame during production. When in use, the ion exchange resin is fixed in the clean water tank through the frame to exchange ions in the wastewater in the clean water tank. In order to improve the ion exchange efficiency of the ion exchange resin, the upper and lower ends of the frame are set to a symmetrical structure with the same curvature, and the side of the frame is a vertical structure. This structure improves the exchange performance of the ion exchange resin membrane while improving the support performance of the frame.

[0003] In the prior art, when ion exchange resin is transported, in order to prevent the resin from being bumped and dust from adhering, a layer of isolation film is generally coated on the surface of the resin. When the existing heat shrink packaging machine coats the resin surface with air pressure, the gas pressure is relatively high, which is easy to damage the resin surface. Therefore, it is not possible to coat the curved surface structure with a certain curvature tightly under the premise of relatively low pressure, resulting in the volume of the ion exchange resin after coating becoming larger, which is inconvenient to transport. In addition, during coating, the isolation film cannot be completely tightly attached to the surface of the ion exchange resin, and a large gap remains between the isolation film and the resin. During long-term transportation, impurities such as dust in the gap will fall into the holes on the surface of the ion exchange resin, causing the quality of the ion exchange resin to decrease. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a film-separating heat shrink packaging machine for ion exchange resin.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a kind of ion exchange resin film separation heat shrink packaging machine, comprising a main body plate, the upper end of the main body plate is provided with a rotating edge sealing mechanism for heat-sealing the upper end of the ion exchange resin surface isolation membrane, the rotating edge sealing mechanism comprises two first limiting grooves symmetrically opened on the side of the main body plate, the two first limiting grooves are respectively slidably fitted with first limiting bodies, the upper ends of the two first limiting bodies are respectively fixedly connected with first electric telescopic rods, the telescopic ends of the two first electric telescopic rods are fixedly connected with a first fixed body, the lower end of the first fixed body is provided with a second limiting groove, the second limiting groove is slidably fitted with a second limiting body, the upper end of the main body plate is provided with a rotating coating mechanism for wrapping the resin surface, and the upper end of the main body plate is provided with a supporting mechanism for clamping the resin.

[0006] Preferably, a first empty slot is formed at the lower end of the second limiting body, a third motor is fixedly connected in the first empty slot, a second electric telescopic rod is fixedly connected to the transmission shaft end of the third motor, a telescopic end of the second electric telescopic rod is fixedly connected to a double-axis electric telescopic rod, the telescopic ends of the double-axis electric telescopic rod are respectively fixedly connected to first pressure sensors, and the ends of the two first pressure sensors are fixedly connected to the second fixed body.

[0007] Preferably, second empty grooves are respectively opened on the inner sides of the two second fixed bodies, and fourth motors are respectively fixedly connected in the two second empty grooves, and rollers are respectively fixedly connected to the drive shaft ends of the two fourth motors, and heating plates are respectively fixedly connected to the sides of the two rollers, and batteries are respectively arranged on the inner sides of the two heating plates, and the batteries and the heating plates are connected by wires.

[0008] Preferably, the two first limiting grooves are respectively fixedly connected with a first motor, the transmission shaft ends of the two first motors are respectively fixedly connected with a first threaded rod, and the side surfaces of the two first threaded rods are respectively arranged with the first limiting body through threaded cooperation.

[0009] Preferably, a second motor is fixedly connected to the side surface of the first fixed body, a second threaded rod is fixedly connected to the transmission shaft end of the second motor in the second limiting groove, and the side surface of the second threaded rod is threadably matched with the second limiting body.

[0010] Preferably, the rotating coating mechanism includes a placement groove opened on the upper end of the main body plate, the upper end of the main body plate is provided with a cavity communicating with the placement groove, a fifth motor is fixedly connected in the cavity, a gear is fixedly connected to the transmission shaft end of the fifth motor, a gear is rotatably arranged in the placement groove, the gear ring is meshed with the gear, and a connecting plate is fixedly connected to the upper end of the gear ring.

[0011] Preferably, the upper end of the connecting plate is fixedly connected to a third fixing body, a third empty slot is opened on one side of the third fixing body, the upper end of the third fixing body is fixedly connected to a sixth motor, the transmission shaft end of the sixth motor is fixedly connected to a rotating rod in the third empty slot by bolts, the upper end of the gear ring is fixedly connected to a multi-stage electric telescopic rod at a position symmetrical to the connecting plate, the telescopic end of the multi-stage electric telescopic rod is fixedly connected to the third electric telescopic rod, the telescopic end of the third electric telescopic rod is fixedly connected to a second pressure sensor, the end of the second pressure sensor is fixedly connected to a heating plate, and the side surface of the heating plate is a curved structure.

[0012] Preferably, the supporting mechanism includes a fourth empty slot opened at the upper end of the main body plate, a fourth electric telescopic rod is fixedly connected in the fourth empty slot, the telescopic end of the fourth electric telescopic rod is fixedly connected to a fourth fixed body, a fifth empty slot is opened at the upper end of the fourth fixed body, a fifth electric telescopic rod is penetrated through the side of the fourth fixed body, and the telescopic ends of several fifth electric telescopic rods are respectively fixedly connected with anti-slip sheets.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The third electric telescopic rod is extended to drive the arc surface end of the heating plate to contact the side surface of the resin. The second pressure sensor at the telescopic end of the third electric telescopic rod can ensure that the heating plate is just in contact with the side surface of the resin. When the fifth motor drives the third fixed body to rotate, the sixth motor is started synchronously, and the sixth motor is connected to the third electric telescopic rod through the controller. The length of the arc surface of the arc resin can be calculated by the telescopic value of the third electric telescopic rod, so that the length of the isolation film on the side of the rotating rod is the same as the arc surface length of the arc resin, ensuring that when the arc resin surface is subsequently coated, the gap between the isolation film and the arc resin surface is very small, preventing the gap between the isolation film and the resin from being too large, and reducing the transportation volume of the resin after coating; 2. The first motor and the second motor drive the second limit body to move along the trajectory drawn by the extension and retraction of the third electric telescopic rod. While moving, the third motor is started and rotated according to the side trajectory of the arc-shaped resin, so that the extension square of the double-axis electric telescopic rod is always perpendicular to the side of the arc-shaped resin. The second electric telescopic rod drives the two second fixed bodies to move to the upper end of the isolation film, and then the double-axis electric telescopic rod is retracted, driving the two rollers to contact the isolation film inward at the same time. Then the battery drives the heating plate to heat, thereby heat-sealing the isolation film at the upper end, so that the upper part of the arc-shaped resin is tightly coated. When the coating is completed, several fifth electric telescopic rods are retracted, and the arc-shaped resin is rotated up and down and the steps are repeated. Then, the other end of the arc-shaped resin can be tightly sealed and coated, thereby improving the quality of the resin sealing after coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 The present invention is a sectional view of the whole Figure 1 ; Figure 3 The present invention is a sectional view of the whole Figure 2 ; Figure 4 The present invention is a sectional view of the whole Figure 3 ; Figure 5 For the present invention Figure 2 A magnified image of point A; Figure 6 For the present invention Figure 2 The enlarged view of point B; Figure 7 For the present invention Figure 3 Enlarged view of point C; Figure 8 For the present invention Figure 3 Enlarged view of point D.

[0015] 1. Main body plate; 2. Rotating edge sealing mechanism; 3. Rotating laminating mechanism; 4. Support mechanism; 21. First electric telescopic rod; 22. First fixed body; 23. First limiting groove; 24. First limiting body; 25. First motor; 26. First threaded rod; 27. Second motor; 28. Second limiting groove; 29. ​​Second threaded rod; 210. Second limiting body; 211. First empty groove; 212. Third motor; 213. Second electric telescopic rod; 214. Double-axis electric telescopic rod; 215. Second fixed body; 216. Second empty groove; 217. Fourth motor; 218. Battery ; 219, roller; 220, heating plate; 221, first pressure sensor; 31, cavity; 32, gear; 33, fifth motor; 34, gear ring; 35, multi-stage electric telescopic rod; 36, placement slot; 37, connecting plate; 38, third electric telescopic rod; 39, heating plate; 310, third fixed body; 311, third empty slot; 313, rotating rod; 314, sixth motor; 315, second pressure sensor; 41, fourth empty slot; 42, fourth electric telescopic rod; 43, fourth fixed body; 44, fifth empty slot; 45, fifth electric telescopic rod; 46, anti-slip sheet. DETAILED DESCRIPTION

[0016] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0017] See also Figure 1-Figure 8A heat shrink packaging machine for ion exchange resin film separation includes a main body plate 1, and a rotating edge sealing mechanism 2 for heat-sealing the upper end of the ion exchange resin surface isolation membrane is arranged on the upper end of the main body plate 1.

[0018] In this embodiment, the rotating edge sealing mechanism 2 includes two first limiting grooves 23 symmetrically opened on the side of the main plate 1, and the first limiting bodies 24 are respectively slidably fitted in the two first limiting grooves 23, and the upper ends of the two first limiting bodies 24 are respectively fixedly connected with the first electric telescopic rods 21, and the telescopic ends of the two first electric telescopic rods 21 are fixedly connected with the first fixed body 22, and the lower end of the first fixed body 22 is opened with a second limiting groove 28, and the second limiting body 210 is slidably fitted in the second limiting groove 28.

[0019] A first slot 211 is provided at the lower end of the second limiting body 210, a third motor 212 is fixedly connected in the first slot 211, a second electric telescopic rod 213 is fixedly connected to the transmission shaft end of the third motor 212, a telescopic end of the second electric telescopic rod 213 is fixedly connected to a double-axis electric telescopic rod 214, the telescopic ends of the double-axis electric telescopic rod 214 are respectively fixedly connected to first pressure sensors 221, and the ends of the two first pressure sensors 221 are fixedly connected to a second fixed body 215.

[0020] A second slot 216 is respectively provided on the inner side of the two second fixed bodies 215, and a fourth motor 217 is respectively fixedly connected to the two second slots 216, and a roller 219 is respectively fixedly connected to the transmission shaft ends of the two fourth motors 217, and a heating plate 220 is respectively fixedly connected to the side surfaces of the two rollers 219, and a battery 218 is respectively arranged on the inner side of the two heating plates 220, and the battery 218 and the heating plate 220 are connected by wires.

[0021] The first motors 25 are fixedly connected in the two first limiting grooves 23 , respectively. The transmission shaft ends of the two first motors 25 are fixedly connected with first threaded rods 26 , respectively. The side surfaces of the two first threaded rods 26 are respectively threadedly matched with the first limiting bodies 24 .

[0022] A second motor 27 is fixedly connected to the side of the first fixed body 22 , a second threaded rod 29 is fixedly connected to the transmission shaft end of the second motor 27 in the second limiting groove 28 , and a side of the second threaded rod 29 is threadedly matched with the second limiting body 210 .

[0023] Specifically, the second motor 27 drives the second threaded rod 29 to rotate, and the second threaded rod 29 cooperates to drive the second limiting body 210 to move in the second limiting groove 28. The first motor 25 and the second motor 27 drive the second limiting body 210 to move along the trajectory drawn by the telescopic third electric telescopic rod 38. While moving, the third motor 212 is started, and the third motor 212 rotates according to the side trajectory of the arc-shaped resin, so that the telescopic square of the dual-axis electric telescopic rod 214 always remains perpendicular to the side of the arc-shaped resin.

[0024] In this embodiment, a rotating coating mechanism 3 for wrapping a film around the resin surface is disposed at the upper end of the main body plate 1 .

[0025] The rotating coating mechanism 3 includes a placement groove 36 opened at the upper end of the main body plate 1, and a cavity 31 communicating with the placement groove 36 is opened at the upper end of the main body plate 1. A fifth motor 33 is fixedly connected in the cavity 31, and a gear 32 is fixedly connected to the transmission shaft end of the fifth motor 33. A gear ring 34 is rotatably arranged in the placement groove 36, and the gear ring 34 is meshed with the gear 32. A connecting plate 37 is fixedly connected to the upper end of the gear ring 34.

[0026] The upper end of the connecting plate 37 is fixedly connected to a third fixed body 310, a third slot 311 is provided on one side of the third fixed body 310, a sixth motor 314 is fixedly connected to the upper end of the third fixed body 310, a transmission shaft end of the sixth motor 314 is fixedly connected to a rotating rod 313 in the third slot 311 by bolts, the upper end of the gear ring 34 is fixedly connected to a multi-stage electric telescopic rod 35 at a position symmetrical to the connecting plate 37, the telescopic end of the multi-stage electric telescopic rod 35 is fixedly connected to a third electric telescopic rod 38, the telescopic end of the third electric telescopic rod 38 is fixedly connected to a second pressure sensor 315, the end of the second pressure sensor 315 is fixedly connected to a heating plate 39, and the side of the heating plate 39 is a curved structure.

[0027] Specifically, the fifth motor 33 drives the gear ring 34 to rotate, and the gear ring 34 drives the third fixed body 310 to rotate with the arc-shaped resin convex surface first. At this time, the multi-stage electric telescopic rod 35 drives the third electric telescopic rod 38 to extend, so that the upper end of the heating plate 39 at the telescopic end of the third electric telescopic rod 38 is flush with the upper end of the resin. Then, the third electric telescopic rod 38 extends, driving the arc surface end of the heating plate 39 to contact the side of the resin.

[0028] In this embodiment, a support mechanism 4 for clamping the resin is disposed at the upper end of the main body plate 1 .

[0029] The support mechanism 4 includes a fourth empty slot 41 opened at the upper end of the main body plate 1, a fourth electric telescopic rod 42 is fixedly connected in the fourth empty slot 41, a telescopic end of the fourth electric telescopic rod 42 is fixedly connected to a fourth fixed body 43, a fifth empty slot 44 is opened at the upper end of the fourth fixed body 43, a fifth electric telescopic rod 45 is penetrated through the side of the fourth fixed body 43, and a plurality of telescopic ends of the fifth electric telescopic rods 45 are respectively fixedly connected with anti-slip sheets 46.

[0030] Specifically, a plurality of fifth electric telescopic rods 45 are retracted at the same time, and a plurality of fifth electric telescopic rods 45 are extended, driving the anti-slip sheet 46 to squeeze the frame at the lower end, thereby fixing the resin.

[0031] When in use, the main body plate 1 is placed on a horizontal support frame, and then the arc-shaped resin is placed in the fifth empty groove 44 through the frame at the lower end, and a plurality of fifth electric telescopic rods 45 are simultaneously retracted and extended, driving the anti-slip sheet 46 to squeeze the frame at the lower end, thereby fixing the resin, and then starting the fifth motor 33, the fifth motor 33 drives the gear 32 to rotate, the gear 32 engages and drives the gear ring 34 to rotate, and the gear ring 34 drives the third fixed body 310 to rotate to a position parallel to the side of the frame, and then the worker bonds one end of the isolation film to the side of the frame through a hot melt, and then starts the fifth motor 33 again, the fifth motor 33 drives the gear ring 34 to rotate, and the gear ring 34 drives the third fixed body 310 to rotate with the convex surface of the arc-shaped resin, and at this time the multi-stage electric telescopic rod 35 drives the third electric telescopic rod 38 to extend, so that the third electric telescopic rod 38 can be telescoped. The upper end of the heating plate 39 at the end is flush with the upper end of the resin, and then the third electric telescopic rod 38 is extended, driving the arc surface end of the heating plate 39 to contact the side of the resin. The second pressure sensor 315 at the telescopic end of the third electric telescopic rod 38 can ensure that the heating plate 39 is just in contact with the side of the resin. In the process of the fifth motor 33 driving the third fixed body 310 to rotate, the sixth motor 314 is started synchronously, and the sixth motor 314 is connected to the third electric telescopic rod 38 through the controller. The length of the arc surface of the arc resin can be calculated through the telescopic value of the third electric telescopic rod 38, so that the length of the isolation film on the side of the rotating rod 313 is the same as the arc surface length of the arc resin, ensuring that when the arc resin surface is subsequently coated, the gap between the isolation film and the arc resin surface is very small, preventing the gap between the isolation film and the resin from being too large, and reducing the transportation volume of the resin after coating.

[0032] After the fifth motor 33 drives the third fixed body 310 to rotate 360°, the worker first flattens and cuts the isolation film, and then fixes the end of the rotated isolation film at the initial position of the frame through a heat fuse. At this time, the length of the isolation film on the side of the frame is the same as the length of the resin arc track. Then the fifth motor 33 is started, and while driving the gear ring 34 to rotate, the third electric telescopic rod 38 is extended and retracted according to the value of the second pressure sensor 315 at the end, ensuring that the heating plate 39 at the end of the second pressure sensor 315 is in contact with the resin surface. At the same time, the heating plate 39 is turned on to heat shrink the arc-shaped resin side to prevent the resin surface from being subjected to greater pressure. When the resin side is completely shrunk, the two first motors 25 are started, and the two first motors 25 respectively drive the first threaded rod 26 to rotate, and the first threaded rod 26 cooperates to drive the first limit body 24 to move. At the same time, the second motor 27 is started, and the second motor 27 drives the second threaded rod 29 to rotate, and the second threaded rod 29 cooperates to drive The second limiting body 210 moves in the second limiting groove 28, and the first motor 25 and the second motor 27 drive the second limiting body 210 to move along the trajectory drawn by the extension and retraction of the third electric telescopic rod 38. While moving, the third motor 212 is started, and the third motor 212 rotates according to the side trajectory of the arc-shaped resin, so that the extension square of the double-axis electric telescopic rod 214 is always perpendicular to the side of the arc-shaped resin. The second electric telescopic rod 213 drives the two second fixed bodies 215 to move to the upper end of the isolation film, and then the double-axis electric telescopic rod 214 contracts, driving the two rollers 219 to contact the isolation film inward at the same time, and then the battery 218 drives the heating plate 220 to heat, thereby heat-sealing the isolation film at the upper end, so that the upper part of the arc-shaped resin is tightly coated. When the coating is completed, a number of fifth electric telescopic rods 45 are contracted, and the arc-shaped resin is rotated up and down and the steps are repeated, so that the other end of the arc-shaped resin can be tightly sealed and coated, thereby improving the quality of the resin sealing coating.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A heat shrink packaging machine for ion exchange resin film separation, comprising a main body plate (1), characterized in that: The upper end of the main body plate (1) is provided with a rotating edge sealing mechanism (2) for heat-sealing the upper end of the isolation membrane on the surface of the ion exchange resin. The rotating edge sealing mechanism (2) comprises two first limiting grooves (23) symmetrically arranged on the side of the main body plate (1). The two first limiting grooves (23) are respectively slidably fitted with first limiting bodies (24). The upper ends of the two first limiting bodies (24) are respectively fixedly connected with first electric telescopic rods (21). The telescopic ends of the two first electric telescopic rods (21) are fixedly connected with first fixed bodies (22). The lower end of the first fixed body (22) is provided with a second limiting groove (28). The second limiting groove (28) is slidably fitted with a second limiting body (210). The upper end of the main body plate (1) is provided with a rotating film coating mechanism (3) for wrapping the resin surface. The upper end of the main body plate (1) is provided with a supporting mechanism (4) for clamping the resin.

2. The ion exchange resin film separation heat shrink packaging machine according to claim 1, characterized in that: A first slot (211) is provided at the lower end of the second limiting body (210), a third motor (212) is fixedly connected in the first slot (211), a second electric telescopic rod (213) is fixedly connected to a transmission shaft end of the third motor (212), a telescopic end of the second electric telescopic rod (213) is fixedly connected to a double-axis electric telescopic rod (214), the telescopic ends of the double-axis electric telescopic rod (214) are respectively fixedly connected to first pressure sensors (221), and ends of two first pressure sensors (221) are fixedly connected to a second fixed body (215).

3. The ion exchange resin film separation heat shrink packaging machine according to claim 2, characterized in that: A second empty slot (216) is respectively provided on the inner side of the two second fixed bodies (215), a fourth motor (217) is respectively fixedly connected in the two second empty slots (216), a roller (219) is respectively fixedly connected to the transmission shaft ends of the two fourth motors (217), a heating plate (220) is respectively fixedly connected to the side surfaces of the two rollers (219), a battery (218) is respectively provided on the inner side of the two heating plates (220), and the battery (218) and the heating plate (220) are connected via an electric wire.

4. The ion exchange resin film separation heat shrink packaging machine according to claim 1, characterized in that: A first motor (25) is fixedly connected to each of the two first limiting grooves (23); a first threaded rod (26) is fixedly connected to each of the transmission shaft ends of the two first motors (25); and side surfaces of the two first threaded rods (26) are respectively threadably matched with the first limiting body (24).

5. The ion exchange resin film separation heat shrink packaging machine according to claim 1, characterized in that: A second motor (27) is fixedly connected to the side surface of the first fixed body (22); a transmission shaft end of the second motor (27) is fixedly connected to a second threaded rod (29) in a second limiting groove (28); and a side surface of the second threaded rod (29) is threadably matched with the second limiting body (210).

6. The ion exchange resin film separation heat shrink packaging machine according to claim 1, characterized in that: The rotating coating mechanism (3) comprises a placement groove (36) provided at the upper end of the main body plate (1); a cavity (31) communicating with the placement groove (36) is provided at the upper end of the main body plate (1); a fifth motor (33) is fixedly connected in the cavity (31); a gear (32) is fixedly connected to the transmission shaft end of the fifth motor (33); a gear ring (34) is rotatably arranged in the placement groove (36); the gear ring (34) is meshed with the gear (32); and a connecting plate (37) is fixedly connected to the upper end of the gear ring (34).

7. The ion exchange resin film separation heat shrink packaging machine according to claim 6, characterized in that: The upper end of the connecting plate (37) is fixedly connected to a third fixed body (310), a third slot (311) is provided on one side of the third fixed body (310), the upper end of the third fixed body (310) is fixedly connected to a sixth motor (314), the transmission shaft end of the sixth motor (314) is fixedly connected to a rotating rod (313) in the third slot (311) by means of bolts, the upper end of the gear ring (34) is fixedly connected to a multi-stage electric telescopic rod (35) at a position symmetrical to the connecting plate (37), the telescopic end of the multi-stage electric telescopic rod (35) is fixedly connected to a third electric telescopic rod (38), the telescopic end of the third electric telescopic rod (38) is fixedly connected to a second pressure sensor (315), the end of the second pressure sensor (315) is fixedly connected to a heating plate (39), and the side surface of the heating plate (39) is a curved surface structure.

8. The ion exchange resin film separation heat shrink packaging machine according to claim 1, characterized in that: The support mechanism (4) comprises a fourth empty slot (41) formed at the upper end of the main body plate (1), a fourth electric telescopic rod (42) being fixedly connected in the fourth empty slot (41), a telescopic end of the fourth electric telescopic rod (42) being fixedly connected to a fourth fixing body (43), a fifth empty slot (44) being formed at the upper end of the fourth fixing body (43), a fifth electric telescopic rod (45) being provided through the side surface of the fourth fixing body (43), and a plurality of anti-slip sheets (46) being fixedly connected to the telescopic ends of the fifth electric telescopic rods (45).

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