Waterproofing membrane lap edge hot melt welding press roller

Abstract

This application relates to the field of waterproof membrane technology and discloses a pressure roller for hot-melt welding of the overlapping edge of a waterproof membrane, including a guide support frame. A sliding frame is slidably installed on one side of the guide support frame, and a support box is fixedly installed on the top of the sliding frame. An installation frame is fixedly installed on the top of the support box. This application has the following advantages and effects: the hot-melt component moves through the overlapping edge of the waterproof membrane; after the drive shaft rotates, it can drive the movable shaft on the other side to rotate through the cooperation of the synchronous belt and the synchronous pulley. After the movable shaft rotates, it can drive the drive shaft on the other side to rotate in the opposite direction through the auxiliary gear. The transmission gear above the drive shaft can cooperate with the tooth groove, so that the sliding frame moves after being subjected to force. This prevents the membrane from shifting during the heating process, makes the burner head more stable during movement, and does not require manual operation, thus ensuring high safety.

Description

Technical Field

[0001] This application relates to the field of waterproof membrane technology, and in particular to a pressure roller for hot-melt welding of the overlapping edges of waterproof membrane. Background Technology

[0002] Modern civil engineering waterproofing employs the practice of encasing a concrete structure in a thin membrane waterproofing layer. As the first line of defense for a building, this membrane waterproofing layer is subject to the effects of natural environmental aging. Its inherent weakness and lateral infinity also mean it will directly bear the damage caused by the building's own operation. Based on these aging and damage mechanisms, SBS / APP modified bitumen waterproofing membranes, with a reinforced core and modified bitumen coatings of a certain thickness on both sides, are the most suitable product for engineering waterproofing design principles, meeting functional and durability requirements. According to the 2017 China Building Waterproofing Industry Development Report, this type of product firmly holds the largest market share in the membrane market, accounting for 44.15%. Traditional waterproofing membrane overlap welding methods often involve heating with a handheld hot air gun, followed by manual pressing or compaction with a simple roller.

[0003] In existing technologies, workers need to manually move the trolley, and during the movement, they need to constantly correct the deviation. In addition, the temperature of the hot-melted membrane is high, and if people accidentally touch it, they may be burned, which makes the safety low. Therefore, we propose a hot-melt welding pressure roller for the overlapping edge of the waterproof membrane to solve the above problems. Utility Model Content

[0004] To address the issue of cumbersome operation, this application provides a pressure roller for hot-melt welding of the overlapping edges of waterproof membrane.

[0005] The above-mentioned technical objective of this application is achieved through the following technical solution: a pressure roller for hot-melt welding of the overlapping edge of a waterproof membrane, comprising a guide support frame, a sliding frame slidably installed on one side of the guide support frame, a support box fixedly installed on the top of the sliding frame, an installation frame fixedly installed on the top of the support box, an air supply tank fixedly installed on the inner side of the installation frame, and a movable hot-melt assembly for the overlapping edge of the waterproof membrane arranged above the sliding frame, the support box, the installation frame and the air supply tank; The waterproof membrane overlap edge moving hot-melt assembly includes a motor, a drive shaft, a transmission gear, a toothed groove, a guide slider, and a guide slide groove. The motor is fixedly installed on the top of the front sliding frame, the drive shaft is fixedly installed on the output end of the motor, and the drive shaft is rotatably installed on the inner side of the sliding frame. The transmission gear is fixedly installed on the upper and lower sides of the outer side of the drive shaft. The toothed groove is opened on the upper and lower sides of one side of the guide support frame, and the transmission gear and the toothed groove mesh with each other. The guide slider is fixedly installed on the upper and lower sides of one side of the sliding frame, and the guide slide groove is opened on the upper and lower sides of one side of the guide support frame. The guide slider is slidably disposed on the inner side of the guide slide groove.

[0006] As a further improvement to the above solution, a handle is fixedly installed on one side of the guide support frame, and reinforcing ribs are fixedly installed on the left and right sides of the support box. The reinforcing ribs are fixedly installed at the bottom of the mounting frame, and a waterproof membrane welding and compaction assembly is provided above the waterproof membrane overlap edge moving hot melt assembly and the mounting frame.

[0007] As a further improvement to the above solution, the waterproof membrane overlap edge moving hot-melt assembly also includes a first electric telescopic rod, a burner head, and an air supply pipe. The first electric telescopic rod is fixedly installed on the top right side of the mounting frame. The burner head is fixedly installed on the output end of the first electric telescopic rod. The input end of the air supply pipe is fixedly installed on the output end of the air supply tank. The output end of the air supply pipe is fixedly installed on the input end of the burner head. An air pump is fixedly installed on one side of the air supply tank. The air supply pipe is fixedly installed on the output end of the air pump. A solenoid valve is provided on the outside of the air supply pipe.

[0008] By adopting the above technical solution, the gas supply tank can supply gas to the burner head, which can bake and heat the overlapping edges of the waterproof membrane after ignition, and perform a heat-melting operation.

[0009] As a further improvement to the above solution, the waterproof membrane welding and compaction assembly includes a movable shaft, an auxiliary gear, a synchronous belt, and a synchronous pulley. The movable shaft is rotatably mounted on the bottom of the rear sliding frame. The auxiliary gear is fixedly mounted on the outside of the movable shaft and the rear drive shaft, with adjacent auxiliary gears meshing. The synchronous belt is fixedly mounted on the outside of the movable shaft and the front drive shaft, and the synchronous pulley is tensioned and sleeved on the outside of the synchronous belt.

[0010] By adopting the above technical solution, the cooperation of the synchronous belt and the synchronous pulley enables the front drive shaft to drive the movable shaft to rotate, and the auxiliary gear enables the movable shaft to drive the rear drive shaft to rotate in the opposite direction, so that the transmission gears on the front and rear sides cooperate with the tooth grooves, allowing the sliding frame to move.

[0011] As a further improvement to the above solution, the waterproof membrane welding and compaction assembly also includes a second electric telescopic rod, a fixing frame, and a compaction roller. The second electric telescopic rod is fixedly installed on the top left side of the mounting frame, the fixing frame is fixedly installed on the output end of the second electric telescopic rod, and the compaction roller is rotatably installed on the inner side of the fixing frame.

[0012] By adopting the above technical solution, the second electric telescopic rod can drive the fixed frame and the compaction roller to descend, making it easier for the compaction roller to come into contact with the roll material.

[0013] As a further improvement to the above solution, the fixed frame is U-shaped, and the compaction roller is made of steel.

[0014] By adopting the above technical solution, the steel compaction roller has a longer service life, and the U-shaped fixing frame facilitates the installation and fixing of the cylindrical compaction roller.

[0015] As a further improvement to the above solution, both the guide slider and the guide groove are T-shaped, and two rotating grooves are opened on one side of the sliding frame, with the transmission gear rotatably installed inside the rotating groove.

[0016] By adopting the above technical solution, the rotating groove allows the transmission gear to extend from the inside of the sliding frame, thereby allowing the transmission gear to mesh with the tooth groove.

[0017] As a further improvement to the above solution, the bottom of the guide support frame is provided with a rubber pad, and the outer side of the handle is provided with an arc-shaped chamfer.

[0018] By adopting the above technical solutions, the rounded chamfer prevents people from being scratched when holding the handle, and the rubber pads make the guide support frame more stable during placement and have greater friction, preventing displacement during use.

[0019] This application includes at least one of the following beneficial technical effects: This application utilizes a movable hot-melt assembly at the overlapping edge of the waterproof membrane. After the drive shaft rotates, it can drive the movable shaft on the other side to rotate through the cooperation of the synchronous belt and synchronous pulley. After the movable shaft rotates, it can drive the drive shaft on the other side to rotate in the opposite direction through the auxiliary gear. This allows the transmission gear above the drive shaft to engage with the tooth groove, so that the sliding frame moves under force. This prevents the membrane from shifting during the heating process, makes the burner head more stable during movement, and eliminates the need for operator assistance, thus ensuring high safety.

[0020] This application features a waterproof membrane welding and compaction assembly. The guide slider above the sliding frame is slidably positioned inside the guide groove, preventing the sliding frame from detaching from the guide support frame during movement. After heating the membrane, the second electric telescopic rod can be controlled to lower the fixed frame and compaction roller, allowing the compaction roller to come into contact with the membrane and further compact the membrane after baking and welding, ensuring welding strength. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of this embodiment; Figure 2 This is a partial structural schematic diagram of this embodiment; Figure 3 This is a partial structural diagram of the second electric telescopic rod and the fixing frame in this embodiment; Figure 4 yes Figure 3 Enlarged structural diagram of part A in the middle; Figure 5 yes Figure 3 A magnified structural diagram of part B.

[0022] In the diagram: 1. Waterproof membrane overlap edge moving hot melt assembly; 2. Waterproof membrane welding and compaction assembly; 3. Guide support frame; 4. Handle; 5. Sliding frame; 6. Support box; 7. Reinforcing rib; 8. Mounting frame; 9. Air supply tank; 11. Motor; 12. Drive shaft; 13. Transmission gear; 14. Gear groove; 15. Guide slider; 16. Guide slide; 17. First electric telescopic rod; 18. Combustion head; 19. Gas supply pipe; 21. Movable shaft; 22. Auxiliary gear; 23. Synchronous belt; 24. Synchronous pulley; 25. Second electric telescopic rod; 26. Fixed frame; 27. Compactor roller. Detailed Implementation

[0023] This application discloses a pressure roller for hot-melt welding of the overlap edge of a waterproof membrane, including a guide support frame 3, a sliding frame 5 slidably installed on one side of the guide support frame 3, a support box 6 fixedly installed on the top of the sliding frame 5, an installation frame 8 fixedly installed on the top of the support box 6, an air supply tank 9 fixedly installed on the inner side of the installation frame 8, and a movable hot-melt assembly 1 for the overlap edge of the waterproof membrane is provided above the sliding frame 5, the support box 6, the installation frame 8 and the air supply tank 9.

[0024] The waterproof membrane overlap edge moving hot melt assembly 1 includes a motor 11, a drive shaft 12, a transmission gear 13, a toothed groove 14, a guide slider 15, and a guide groove 16. The motor 11 is fixedly installed on the top of the front sliding frame 5. The drive shaft 12 is fixedly installed on the output end of the motor 11 and is rotatably installed on the inner side of the sliding frame 5. The transmission gear 13 is fixedly installed on the upper and lower sides of the outer side of the drive shaft 12. The toothed groove 14 is opened on the upper and lower sides of one side of the guide support frame 3. The transmission gear 13 and the toothed groove 14 mesh with each other. The guide slider 15 is fixedly installed on the upper and lower sides of one side of the sliding frame 5. The guide groove 16 is opened on the upper and lower sides of one side of the guide support frame 3 and is slidably disposed on the inner side of the guide groove 16.

[0025] In this embodiment, a handle 4 is fixedly installed on one side of the guide support frame 3, and reinforcing ribs 7 are fixedly installed on the left and right sides of the support box 6. The reinforcing ribs 7 are fixedly installed at the bottom of the mounting frame 8. A waterproof membrane welding and compaction assembly 2 is provided above the waterproof membrane overlap edge moving hot melt assembly 1 and the mounting frame 8.

[0026] In this embodiment, the waterproof membrane overlap edge moving hot-melt assembly 1 also includes a first electric telescopic rod 17, a burner head 18, and a gas supply pipe 19. The first electric telescopic rod 17 is fixedly installed on the top right side of the mounting frame 8. The burner head 18 is fixedly installed on the output end of the first electric telescopic rod 17. The input end of the gas supply pipe 19 is fixedly installed on the output end of the gas supply tank 9, and the output end of the gas supply pipe 19 is fixedly installed on the input end of the burner head 18. An air pump is fixedly installed on one side of the gas supply tank 9, and the gas supply pipe 19 is fixedly installed on the output end of the air pump. A solenoid valve is provided on the outside of the gas supply pipe 19. To ensure stable heating from the burner head 18, the rated power of the air pump is set to 500W, which can provide a gas supply pressure of 0.3-0.5MPa. The gas flow rate can be adjusted by the solenoid valve according to the material and thickness of the waterproof membrane. Meanwhile, pressure and temperature sensors are installed in the system. The pressure sensor is installed on the gas supply pipe 19 near the burner head 18 to monitor the gas supply pressure in real time. When the pressure is lower than 0.3MPa or higher than 0.5MPa, the control system automatically adjusts the opening of the solenoid valve to ensure stable gas supply pressure. The temperature sensor is installed at the flame outlet of the burner head 18 to monitor the flame temperature in real time. According to the preset heating temperature range corresponding to different waterproof membrane materials, the system automatically adjusts the power of the air pump and the flow rate of the solenoid valve to achieve precise heating.

[0027] The gas supply pipe 19 transmits gas to the burner head 18, which ignites the gas and heats the rolled material at high temperature. A heat-insulating protective cover is installed on the outside of the burner head 18. The cover is made of high-temperature resistant ceramic fiber material, 10mm thick, which effectively blocks heat dissipation and prevents accidental burns. Furthermore, a warning light strip is installed on the outside of the heat-insulating protective cover. When the equipment is running, the warning light strip flashes red to remind surrounding personnel to maintain a safe distance, further addressing the issue of easy burns in the prior art.

[0028] In this embodiment, the waterproof membrane welding and compaction assembly 2 includes a movable shaft 21, an auxiliary gear 22, a synchronous belt 23, and a synchronous pulley 24. The movable shaft 21 is rotatably mounted on the bottom of the rear sliding frame 5. The auxiliary gear 22 is fixedly mounted on the outside of the movable shaft 21 and the rear drive shaft 12, with adjacent auxiliary gears 22 meshing. The synchronous belt 23 is fixedly mounted on the outside of the movable shaft 21 and the front drive shaft 12, and the synchronous pulley 24 is tensioned and sleeved on the outside of the synchronous belt 23. Two parallel guide rails are provided on one side of the guide support frame 3. The guide groove 16 is opened along the direction of the guide rails, and the length of the guide groove 16 is 1500mm, which can ensure that the sliding frame 5 always maintains a straight line during movement and realizes automatic correction.

[0029] To prevent the synchronous belt 23 from loosening and causing transmission failure after prolonged use, an automatic tensioning device is installed on the outside of the synchronous belt 23. The automatic tensioning device includes a tensioning wheel, a pressure spring, and a displacement sensor. The tensioning wheel contacts the synchronous belt 23, the pressure spring provides tension to the tensioning wheel, and the displacement sensor monitors the displacement of the tensioning wheel in real time. When the displacement exceeds a set threshold, it indicates that the synchronous belt 23 is loose, and the control system drives an electric push rod to adjust the position of the tensioning wheel, automatically adjusting the tension of the synchronous belt 23. Simultaneously, speed sensors are installed on both the drive shaft 12 and the movable shaft 21 to monitor the rotational speed of the shafts in real time. When abnormal deviations occur in the speeds on both sides, the control system automatically adjusts the speed of the motor 11 to ensure smooth movement of the sliding frame 5 and prevent deviation during the heating process of the roll material.

[0030] The control motor 11 drives the drive shaft 12 to rotate. After the drive shaft 12 rotates, it can drive the movable shaft 21 on the other side to rotate through the cooperation of the synchronous belt 23 and the synchronous pulley 24. After the movable shaft 21 rotates, it can drive the drive shaft 12 on the other side to rotate in the opposite direction through the auxiliary gear 22. This allows the transmission gear 13 above the drive shaft 12 to cooperate with the tooth groove 14, so that the sliding frame 5 moves under force. This prevents the roll material from shifting during the heating process and makes the burner head 18 more stable during movement. It also eliminates the need for operator assistance, thus ensuring high safety.

[0031] In this embodiment, the waterproof membrane welding and compaction assembly 2 further includes a second electric telescopic rod 25, a fixing frame 26, and a compaction roller 27. The second electric telescopic rod 25 is fixedly installed on the top left side of the mounting frame 8, the fixing frame 26 is fixedly installed on the output end of the second electric telescopic rod 25, and the compaction roller 27 is rotatably installed on the inner side of the fixing frame 26. The second electric telescopic rod 25 has a stroke of 100mm and a maximum thrust of 500N. Its descent distance and pressure can be adjusted by the control system according to the thickness and material of the waterproof membrane. A pressure sensor is installed on the fixing frame 26 to monitor the pressure between the compaction roller 27 and the membrane in real time. When the pressure reaches a preset value, the control system controls the second electric telescopic rod 25 to stop descending to avoid excessive pressure damaging the membrane; when the pressure is insufficient, the thrust is automatically increased to ensure welding strength.

[0032] The second electric telescopic rod 25 is controlled to lower the fixed frame 26 and the compaction roller 27, allowing the compaction roller 27 to come into contact with the roll material, further compacting the rolled material after baking and welding to ensure weld strength. Simultaneously, a temperature sensor is installed on the surface of the compaction roller 27 to monitor its temperature in real time. When the temperature is too high, a cooling device is activated to cool the compaction roller 27, preventing high temperatures from adversely affecting the surface of the roll material.

[0033] In this embodiment, the fixing frame 26 is U-shaped, and the compaction roller 27 is made of steel. The surface of the steel compaction roller 27 has undergone quenching treatment, achieving a hardness of HRC55, which effectively resists wear and extends its service life. The U-shaped fixing frame 26 facilitates the installation and fixation of the cylindrical compaction roller 27. Furthermore, a buffer rubber pad is provided at the connection between the fixing frame 26 and the second electric telescopic rod 25 to reduce the impact of vibrations generated during compaction on the equipment and improve the stability of equipment operation. In this embodiment, both the guide slider 15 and the guide groove 16 are T-shaped. Two rotating slots are provided on one side of the sliding frame 5. The transmission gear 13 is rotatably mounted inside the rotating slot. The depth of the rotating slot is 20mm, ensuring that the transmission gear 13 extends from the inside of the sliding frame 5, thereby allowing the transmission gear 13 to mesh with the tooth groove 14. To prevent the guide slider 15 from jamming in the guide groove 16, high-temperature resistant grease is applied to the contact surfaces of the guide slider 15 and the guide groove 16. The working temperature range of the grease is -20℃ to 200℃, ensuring smooth operation of the equipment under various working conditions.

[0034] In this embodiment, the bottom of the guide support frame 3 is provided with a rubber pad. The rubber pad is made of nitrile rubber, with a thickness of 15mm and an anti-slip texture on the surface. The coefficient of friction reaches 0.8, which makes the guide support frame 3 relatively stable during placement and provides high friction to prevent displacement during use. A pressure sensor is embedded inside the rubber pad. When uneven pressure distribution is detected, the display screen prompts the operator to adjust the equipment position to ensure stable placement. The handle 4 has a rounded chamfer on the outer side with a radius of 5mm to prevent scratches when gripping the handle. At the same time, the anti-slip texture on the surface of the handle 4 increases the comfort and stability of the grip.

[0035] The specific operation is as follows: the operator can lift the guide support frame 3 using handle 4 and transport it to the overlapping edge of the roll material. The material and thickness parameters of the waterproof roll material are set on the display screen. The control system automatically adjusts the air pump power, solenoid valve flow rate, motor 11 speed, and the descent parameters of the second electric telescopic rod 25 according to the preset program. At this time, the gas supply pipe 19 can be controlled to transmit gas to the burner head 18. The burner head 18 can ignite and heat the roll material at high temperature with the flame. During the heating process, the motor 11 drives the drive shaft 12 to rotate. After the drive shaft 12 rotates, it can drive the movable shaft 21 on the other side to rotate through the cooperation of the synchronous belt 23 and the synchronous pulley 24. After the movable shaft 21 rotates, it can drive the drive shaft 12 on the other side to rotate in the opposite direction through the auxiliary gear 22. This allows the transmission gear 13 above the drive shaft 12 to engage with the tooth groove 14, allowing the sliding frame 5 to move under force. This prevents the roll material from shifting during heating and ensures the stability of the burner head 18 during movement. No operator assistance is required, resulting in high safety.

[0036] The guide slider 15 above the sliding frame 5 is slidably positioned inside the guide groove 16, preventing the sliding frame 5 from detaching from the guide support frame 3 during movement. After heating the roll material, the control system controls the second electric telescopic rod 25 to lower the fixed frame 26 and the compaction roller 27. The compaction pressure is monitored in real time by a pressure sensor, further compacting the baked and welded roll material to ensure weld strength. Throughout the entire process, sensors monitor the equipment's operating status in real time. In case of any abnormality, the control system automatically alarms and takes corresponding protective measures, such as shutting down the air pump and stopping the motor, to ensure the safety of equipment and personnel.

Claims

1. A pressure roller for hot-melt welding of overlapping edges of waterproof membrane, characterized in that, Includes a guide support frame (3), a sliding frame (5) is slidably installed on one side of the guide support frame (3), a support box (6) is fixedly installed on the top of the sliding frame (5), an installation frame (8) is fixedly installed on the top of the support box (6), an air supply tank (9) is fixedly installed on the inner side of the installation frame (8), and a waterproof membrane overlap edge moving hot melt assembly (1) is provided above the sliding frame (5), support box (6), installation frame (8) and air supply tank (9); The waterproof membrane overlap edge moving hot melt assembly (1) includes a motor (11), a drive shaft (12), a transmission gear (13), a tooth groove (14), a guide slider (15), and a guide groove (16). The motor (11) is fixedly installed at the bottom of the front sliding frame (5). The drive shaft (12) is fixedly installed at the output end of the motor (11). The drive shaft (12) is rotatably installed on the inner side of the sliding frame (5). The transmission gear (13) is fixedly installed on the upper and lower sides of the outer side of the drive shaft (12). The tooth groove (14) is opened on the upper and lower sides of one side of the guide support frame (3). The transmission gear (13) and the tooth groove (14) mesh with each other. The guide slider (15) is fixedly installed on the upper and lower sides of one side of the sliding frame (5). The guide groove (16) is opened on the upper and lower sides of one side of the guide support frame (3). The guide slider (15) is slidably arranged on the inner side of the guide groove (16).

2. The waterproof membrane overlap edge hot-melt welding pressure roller according to claim 1, characterized in that: A handle (4) is fixedly installed on one side of the guide support frame (3), and reinforcing ribs (7) are fixedly installed on the left and right sides of the support box (6). The reinforcing ribs (7) are fixedly installed at the bottom of the mounting frame (8). A waterproof membrane welding and compaction assembly (2) is provided above the waterproof membrane overlap edge moving hot melt assembly (1) and the mounting frame (8).

3. The waterproof membrane overlap edge hot-melt welding pressure roller according to claim 1, characterized in that: The waterproof membrane overlap edge moving hot melt assembly (1) also includes a first electric telescopic rod (17), a burner head (18), and an air supply pipe (19). The first electric telescopic rod (17) is fixedly installed on the top right side of the mounting frame (8). The burner head (18) is fixedly installed at the output end of the first electric telescopic rod (17). The input end of the air supply pipe (19) is fixedly installed at the output end of the air supply tank (9). The output end of the air supply pipe (19) is fixedly installed at the input end of the burner head (18). An air pump is fixedly installed on one side of the air supply tank (9). The air supply pipe (19) is fixedly installed at the output end of the air pump. A solenoid valve is provided on the outside of the air supply pipe (19).

4. The waterproof membrane overlap edge hot-melt welding pressure roller according to claim 2, characterized in that: The waterproof membrane welding and compaction assembly (2) includes a movable shaft (21), an auxiliary gear (22), a synchronous belt (23), and a synchronous pulley (24). The movable shaft (21) is rotatably mounted on the top of the rear sliding frame (5). The auxiliary gear (22) is fixedly mounted on the outside of the movable shaft (21) and the rear drive shaft (12). Two adjacent auxiliary gears (22) mesh with each other. The synchronous belt (23) is fixedly mounted on the outside of the movable shaft (21) and the front drive shaft (12). The synchronous pulley (24) is tensioned and sleeved on the outside of the synchronous belt (23).

5. A pressure roller for hot-melt welding of overlapping edges of waterproof membrane according to claim 2, characterized in that: The waterproof membrane welding and compaction assembly (2) also includes a second electric telescopic rod (25), a fixing frame (26) and a compaction roller (27). The second electric telescopic rod (25) is fixedly installed on the top left side of the mounting frame (8). The fixing frame (26) is fixedly installed on the output end of the second electric telescopic rod (25). The compaction roller (27) is rotatably installed on the inner side of the fixing frame (26).

6. A pressure roller for hot-melt welding of overlapping edges of waterproof membrane according to claim 5, characterized in that: The fixed frame (26) is U-shaped, and the compaction roller (27) is made of steel.

7. A pressure roller for hot-melt welding of overlapping edges of waterproof membrane according to claim 6, characterized in that: The guide slider (15) and guide groove (16) are both T-shaped. Two rotating grooves are opened on one side of the sliding frame (5). The transmission gear (13) is rotatably installed inside the rotating groove.

8. A pressure roller for hot-melt welding of overlapping edges of waterproof membrane according to claim 6, characterized in that: The bottom of the guide support frame (3) is provided with a rubber pad, and the outer side of the handle (4) is provided with an arc-shaped chamfer.

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