A device for laying out and applying a waterproofing membrane

Abstract

The utility model discloses a kind of flattening and laying device of waterproof roll material, including trolley and lifting plate, the outside of trolley is provided with lifting plate, the top of lifting plate is installed with support frame, the side away from support frame of the top of lifting plate is installed with U-shaped frame, the outside of U-shaped frame is provided with profiled plate, the sidewall of support frame is installed with stepper motor, the output of stepper motor is installed with rotating shaft. The utility model not only realizes that flattening and laying device conveniently and stably transports waterproof roll material, facilitates the heating transport of the spacing of convenient adjustment to different thickness waterproof roll material, and facilitates the reciprocating movement of convenient waterproof roll material and extrusion flattening, improve the efficiency of reciprocating movement of flattening and laying device and extrusion flattening.

Description

Technical Field

[0001] This utility model relates to the technical field of flattening and laying devices, specifically a flattening and laying device for waterproof membrane. Background Technology

[0002] A waterproof membrane flattening and laying device is a piece of equipment used in building construction to lay waterproof membranes. Its main function is to lay the waterproof membrane flat on the building surface and ensure that no wrinkles or air bubbles are generated during the laying process. Such devices usually include multiple components, such as membrane rollers, flattening rollers, de-bubbling components, hot press rollers, and traveling wheels, to ensure the flatness and adhesion of the membrane.

[0003] For example, the waterproof membrane flattening and laying device disclosed in the authorization announcement number CN222796906U includes a fixed frame, an electromagnetic valve tube is provided on the side of the fixed frame, a cylinder is fixedly mounted on the side of the electromagnetic valve tube, a first magnet is fixedly mounted on the side of the electromagnetic valve tube, a second magnet is attracted to the side of the first magnet, a connecting plate is fixedly mounted on the side of the second magnet, and a connecting rod is fixedly mounted on the side of the connecting plate, and the side of the connecting rod is rotatably connected to the side of the fixed frame.

[0004] Although it achieves the goal of using an air pump to supply air to the inside of the fixed frame, thereby using a connecting pipe to assist the gas inside the fixed frame to pass through the inner wall of the cylinder to push the round rod to move, the round rod to drive the pressure plate to move, and the pressure plate to drive the waterproof membrane to be laid flat, then the air pump and solenoid valve pipe are turned off to assist the waterproof membrane to be laid flat and then limited, and then the connecting plate is rotated to use the air pump to supply air to the inside of the auxiliary cylinder, thereby using the connecting frame to drive the roller to lay the waterproof membrane flat for a second time. Through the cooperation of the adjusting plate and the threaded rod, the adjusting plate is rotated on the side of the cylinder and the auxiliary cylinder, thereby using the adjusting plate to drive the threaded rod to move away from the round rod, thereby assisting the disassembly of the pressure plate and the roller, and thus assisting the pressure plate and the roller to be replaced and maintained as needed;

[0005] However, this does not solve the problem that existing flattening and laying devices are generally not conducive to the convenient and stable transport of waterproof membranes, are not convenient to adjust the spacing for heating and transporting waterproof membranes of different thicknesses, and are not convenient to move back and forth to squeeze and flatten the waterproof membranes, thus affecting the efficiency of the flattening and laying device in moving back and forth to squeeze and flatten. Utility Model Content

[0006] The purpose of this utility model is to provide a device for flattening and laying waterproof membranes, so as to solve the problems mentioned in the background art that the flattening and laying device is not convenient and stable for conveying waterproof membranes, not convenient for adjusting the spacing to heat and convey waterproof membranes of different thicknesses, and not convenient for reciprocating movement to compress and flatten the waterproof membrane, which affects the efficiency of the flattening and laying device for reciprocating movement to compress and flatten.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a waterproof membrane flattening and laying device, comprising a trolley and a lifting plate. The lifting plate is disposed on the outside of the trolley, and a support frame is installed at the top of the lifting plate. A U-shaped frame is installed on the side of the top of the lifting plate away from the support frame. A shaped plate is disposed on the outside of the U-shaped frame. A stepper motor is installed on the side wall of the support frame, and a rotating shaft is installed at the output end of the stepper motor. The rotating shaft extends through the support frame to its outside. A support shaft is movably installed on the side wall of the support frame outside the rotating shaft, extending through the support frame to its outside. The rotating shaft is located inside the support frame. A first roller is fitted onto the surface of the support frame, a second roller is fitted onto the surface of the internal support shaft, a synchronous belt pulley assembly is fitted onto the surface of the external rotating shaft of the support frame, the end of the synchronous belt pulley assembly away from the rotating shaft is connected to the support shaft, a roller is movably mounted on the top side wall of the support frame, a first electric push rod is movably mounted on the internal bottom end of the support frame, a movable shaft is movably mounted on the output end of the first electric push rod, a support frame is provided on the outside of the support frame, rotating shafts are movably mounted on both sides of the support frame, the support frame is movably connected to the support frame through the rotating shafts, and the first electric push rod is connected to the support frame through the movable shaft.

[0008] Preferably, a power motor is installed on the side wall of the U-shaped frame, and a first shaft is installed at the output end of the power motor. The first shaft extends through the U-shaped frame to its outside, and a second heating roller is fitted on the surface of the first shaft inside the U-shaped frame.

[0009] Preferably, a second electric push rod is symmetrically installed at the top of the U-shaped frame, and a lifting block is installed at the output end of each of the second electric push rods. A second shaft is provided outside the second heating roller, and both sides of the second shaft are connected to the lifting block. A first heating roller is fitted on the surface of the second shaft, and the lifting block is slidably connected to the U-shaped frame.

[0010] Preferably, variable frequency motors are symmetrically installed on the side wall of the lifting plate, and each variable frequency motor has a reciprocating lead screw installed at its output end. The reciprocating lead screw extends to the side wall of the trolley and is movably connected thereto.

[0011] Preferably, the surface of each reciprocating lead screw is fitted with a second threaded block, and each reciprocating lead screw is threadedly connected to the second threaded block. A support plate is provided on the outside of the lifting plate, and each second threaded block is connected to the support plate.

[0012] Preferably, each of the support plates has a support column installed at its bottom end, and each support column has a spring fitted on its surface. The irregular plate is slidably connected to the support column, and the irregular plate is connected to the spring. Three sets of rotating rollers with equal spacing are movably installed at the bottom end of the irregular plate.

[0013] Preferably, a servo motor is installed at the top of the trolley, and a threaded rod is installed at the output end of the servo motor. The threaded rod extends through the trolley and is movably connected to its interior. A first threaded block is fitted on the surface of the threaded rod.

[0014] Preferably, the threaded rod is threadedly connected to the first threaded block, the first threaded block is connected to the lifting plate, and rollers are symmetrically and movably installed on the side wall of the lifting plate, all of which are slidably connected to the trolley.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the flattening and laying device not only realizes the convenient and stable conveying of waterproof membrane, but also facilitates the convenient adjustment of the spacing for heating and conveying waterproof membrane of different thicknesses, and facilitates the convenient reciprocating movement of the waterproof membrane for pressing and flattening, thereby improving the efficiency of the flattening and laying device for reciprocating movement for pressing and flattening.

[0016] (1) The waterproof membrane on the surface of the roller is pulled so that it passes through the second roller, the first roller, and the support frame and extends to the top of the second heating roller. It is then pulled to the ground for flattening. When the waterproof membrane needs to be transported, the stepper motor drives the rotating shaft to rotate. The rotating shaft drives the first roller to rotate. At the same time, the rotating shaft drives the synchronous belt pulley assembly to rotate. The synchronous belt pulley assembly drives the support shaft and the second roller to rotate, so that the second roller and the first roller transport the waterproof membrane. The first electric push rod drives the movable shaft to move. Under the movable support of the rotating shaft, the movable shaft drives the support frame and the waterproof membrane to rotate a certain angle around the rotating shaft to tighten the waterproof membrane. This realizes the convenient and stable transport of the waterproof membrane by the flattening and laying device, and improves the stability of the waterproof membrane during transport.

[0017] (2) The second electric push rod drives the lifting block to move up and down. The lifting block drives the second shaft and the first heating roller to move up and down, so that the first heating roller comes into contact with the waterproof membrane and squeezes it towards the second heating roller. The power motor drives the first shaft to rotate. The first shaft drives the second heating roller and the waterproof membrane to rotate. With the support of the first heating roller, the second heating roller drives the waterproof membrane to be transported to the ground. This facilitates the convenient adjustment of the spacing to heat and transport waterproof membranes of different thicknesses, and improves the flexibility of the flattening and laying device to adjust the spacing for heating.

[0018] (3) The variable frequency motor drives the reciprocating screw to rotate, the reciprocating screw drives the second threaded block to move back and forth, the second threaded block drives the support plate, support column, spring and rotating roller to move back and forth, so that multiple sets of rotating rollers move back and forth to squeeze the waterproof membrane, which facilitates the reciprocating movement of the waterproof membrane to squeeze and flatten it, and improves the efficiency of the flattening and laying device to move back and forth to squeeze and flatten it.

[0019] (4) The servo motor drives the threaded rod to rotate, and the threaded rod drives the first threaded block to move upward. Under the sliding support of the roller and the trolley, the first threaded block drives the lifting plate, support frame and U-shaped frame to move upward to a specified height, which facilitates convenient height adjustment and avoids accidental touch by irrelevant personnel. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a front view structural diagram of the present utility model;

[0022] Figure 3 This is a three-dimensional structural diagram of the lifting plate of this utility model;

[0023] Figure 4 This is a three-dimensional structural diagram of the support frame of this utility model;

[0024] Figure 5 This is a three-dimensional structural diagram of the support frame of this utility model;

[0025] Figure 6 This is a three-dimensional structural diagram of the U-shaped frame of this utility model;

[0026] Figure 7 This is a three-dimensional structural diagram of the support plate of this utility model;

[0027] Figure 8 This is a three-dimensional structural diagram of the irregular-shaped plate of this utility model.

[0028] In the diagram: 1. Trolley; 2. Lifting plate; 3. Support frame; 4. U-shaped frame; 5. Irregular plate; 6. Servo motor; 7. Threaded rod; 8. First threaded block; 9. Roller; 10. Stepper motor; 11. Rotating shaft; 12. Synchronous belt pulley assembly; 13. Support shaft; 14. First roller; 15. Second roller; 16. Roller; 17. First electric push rod; 18. Movable shaft; 19. Rotating shaft; 20. Support frame; 21. Power motor; 22. First shaft; 23. Second shaft; 24. Second electric push rod; 25. Lifting block; 26. First heating roller; 27. Second heating roller; 28. Variable frequency motor; 29. ​​Second threaded block; 30. Reciprocating lead screw; 31. Support plate; 32. Support column; 33. Spring; 34. Rotating roller. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0030] Please see Figure 1-8 This utility model provides an embodiment of a waterproof membrane flattening and laying device, comprising a trolley 1 and a lifting plate 2. The lifting plate 2 is disposed on the outside of the trolley 1, and a support frame 3 is installed on the top of the lifting plate 2. A U-shaped frame 4 is installed on the side of the top of the lifting plate 2 away from the support frame 3. A shaped plate 5 is disposed on the outside of the U-shaped frame 4. A stepper motor 10 is installed on the side wall of the support frame 3, and a rotating shaft 11 is installed on the output end of the stepper motor 10. The rotating shaft 11 extends through the support frame 3 to its outside. A support shaft 13 is movably installed on the side wall of the support frame 3 outside the rotating shaft 11. The support shaft 13 extends through the support frame 3 to its outside. A first roller 1 is fitted on the surface of the rotating shaft 11 inside the support frame 3. 4. A second roller 15 is fitted on the surface of the internal support shaft 13 of the support frame 3. A synchronous belt pulley assembly 12 is fitted on the surface of the external rotating shaft 11 of the support frame 3. The end of the synchronous belt pulley assembly 12 away from the rotating shaft 11 is connected to the support shaft 13. A roller 16 is movably installed on the top side wall of the support frame 3. A first electric push rod 17 is movably installed at the bottom of the internal part of the support frame 3. A movable shaft 18 is movably installed at the output end of the first electric push rod 17. A support frame 20 is provided on the outside of the support frame 3. Rotating shafts 19 are movably installed on both sides of the support frame 20. The support frame 20 is movably connected to the support frame 3 through the rotating shafts 19. The first electric push rod 17 is connected to the support frame 20 through the movable shaft 18.

[0031] When using the waterproof membrane flattening and laying device, the waterproof membrane on the surface of roller 16 is pulled so that it passes through the second roller 15, the first roller 14, and the support frame 20, extending above the second heating roller 27, and continues to be pulled to the ground for flattening. When it is necessary to transport the waterproof membrane, the stepper motor 10 is turned on. Under the support of the support frame 3, the stepper motor 10 drives the rotating shaft 11 to rotate. The rotating shaft 11 drives the first roller 14 to rotate, and at the same time, the rotating shaft 11 drives the synchronous belt pulley assembly 12 to rotate. 12 drives the support shaft 13 and the second roller 15 to rotate, so that the second roller 15 and the first roller 14 convey the waterproof membrane. The first electric push rod 17 is opened. Under the movable support of the support frame 3, the first electric push rod 17 drives the movable shaft 18 to move. Under the movable support of the rotating shaft 19, the movable shaft 18 drives the support frame 20 and the waterproof membrane to rotate a certain angle around the rotating shaft 19 to tighten the waterproof membrane. This realizes the convenient and stable conveying of the waterproof membrane by the flattening and laying device, and improves the stability of the waterproof membrane during conveying.

[0032] A power motor 21 is installed on the side wall of the U-shaped frame 4. A first shaft 22 is installed at the output end of the power motor 21. The first shaft 22 extends through the U-shaped frame 4 to its outside. A second heating roller 27 is fitted on the surface of the first shaft 22 inside the U-shaped frame 4.

[0033] The top of the U-shaped frame 4 is symmetrically equipped with a second electric push rod 24. The output end of the second electric push rod 24 is equipped with a lifting block 25. The second heating roller 27 is provided with a second shaft 23. Both sides of the second shaft 23 are connected to the lifting block 25. The surface of the second shaft 23 is fitted with a first heating roller 26. The lifting block 25 is slidably connected to the U-shaped frame 4.

[0034] When it is necessary to adjust the spacing to heat waterproof membranes of different thicknesses, when the waterproof membrane is conveyed to the surface of the second heating roller 27, the second heating roller 27 and the first heating roller 26 are opened, and two sets of second electric push rods 24 are opened. Under the support of the U-shaped frame 4, the second electric push rods 24 drive the lifting block 25 to move up and down. The lifting block 25 drives the second shaft 23 and the first heating roller 26 to move up and down, so that the first heating roller 26 contacts the waterproof membrane and squeezes it towards the second heating roller 27. The power motor 21 is opened, and under the support of the U-shaped frame 4, the power motor 21 drives the first shaft 22 to rotate. The first shaft 22 drives the second heating roller 27 and the waterproof membrane to rotate. Under the support of the first heating roller 26, the second heating roller 27 carries the waterproof membrane to the ground. This facilitates the convenient adjustment of the spacing to heat and convey waterproof membranes of different thicknesses, and improves the flexibility of the flattening and laying device in adjusting the spacing for heating.

[0035] Variable frequency motors 28 are symmetrically installed on the side wall of the lifting plate 2. Each output end of the variable frequency motor 28 is equipped with a reciprocating lead screw 30, which extends to the side wall of the trolley 1 and is movably connected thereto.

[0036] The surface of the reciprocating lead screw 30 is fitted with a second threaded block 29, and the reciprocating lead screw 30 is threadedly connected to the second threaded block 29. The outside of the lifting plate 2 is provided with a support plate 31, and the second threaded block 29 is connected to the support plate 31.

[0037] Support columns 32 are installed at the bottom of each support plate 31, and springs 33 are fitted on the surface of each support column 32. The irregular plate 5 is slidably connected to the support column 32 and connected to the springs 33. Three sets of rotating rollers 34 with equal spacing are movably installed at the bottom of the irregular plate 5.

[0038] When the waterproof membrane needs to be laid flat on the ground, under the elastic support of the spring 33 and the sliding connection between the support column 32 and the shaped plate 5, multiple sets of rotating rollers 34 make elastic contact with the ground. When passing over the waterproof membrane, the multiple sets of rotating rollers 34 squeeze the waterproof membrane downward and make it contact the ground. The two sets of variable frequency motors 28 are turned on. Under the support of the lifting plate 2, the variable frequency motors 28 drive the reciprocating screw 30 to rotate. Under the threaded connection between the reciprocating screw 30 and the second threaded block 29, the reciprocating screw 30 drives the second threaded block 29 to move back and forth. The second threaded block 29 drives the support plate 31, support column 32, spring 33 and rotating rollers 34 to move back and forth, so that the multiple sets of rotating rollers 34 reciprocate and squeeze the waterproof membrane. This facilitates the reciprocating and squeezing flattening of the waterproof membrane and improves the efficiency of the flattening and laying device.

[0039] A servo motor 6 is installed at the top of the trolley 1. A threaded rod 7 is installed at the output end of the servo motor 6. The threaded rod 7 extends through the trolley 1 and into its interior, where it is movably connected. A first threaded block 8 is fitted on the surface of the threaded rod 7.

[0040] The threaded rod 7 is threadedly connected to the first threaded block 8, the first threaded block 8 is connected to the lifting plate 2, and rollers 9 are symmetrically and movably installed on the side wall of the lifting plate 2. All rollers 9 are slidably connected to the trolley 1.

[0041] When the flattening and laying device needs to be lifted, the servo motor 6 is turned on. With the support of the trolley 1, the servo motor 6 drives the threaded rod 7 to rotate. With the threaded connection between the threaded rod 7 and the first threaded block 8, the threaded rod 7 drives the first threaded block 8 to move upward. With the sliding support between the roller 9 and the trolley 1, the first threaded block 8 drives the lifting plate 2, the support frame 3, and the U-shaped frame 4 to move upward to a specified height, which facilitates convenient height adjustment and avoids accidental contact by unauthorized personnel.

[0042] Working principle: When using the waterproof membrane flattening and laying device, the waterproof membrane on the surface of roller 16 is pulled, extending through the second roller 15, the first roller 14, and the support frame 20 to above the second heating roller 27, and then further pulled to the ground for flattening. When the waterproof membrane needs to be conveyed, the stepper motor 10 drives the rotating shaft 11 to rotate. The rotating shaft 11 drives the first roller 14 to rotate, and simultaneously the rotating shaft 11 drives the synchronous belt pulley assembly 12 to rotate. The synchronous belt pulley assembly 12 drives the support shaft 13 and the second roller 15 to rotate, so that the second roller 16... The second roller 15 and the first roller 14 convey the waterproof membrane. The first electric push rod 17 drives the movable shaft 18 to move. Under the movable support of the rotating shaft 19, the movable shaft 18 drives the support frame 20 and the waterproof membrane to rotate around the rotating shaft 19 at a certain angle to tighten the waterproof membrane. The second electric push rod 24 drives the lifting block 25 to move up and down. The lifting block 25 drives the second shaft 23 and the first heating roller 26 to move up and down, so that the first heating roller 26 contacts the waterproof membrane and squeezes it towards the second heating roller 27. The power motor 21 drives the first... Shaft 22 rotates, driving the second heating roller 27 and the waterproof membrane to rotate. Supported by the first heating roller 26, the second heating roller 27 transports the waterproof membrane to the ground. When the waterproof membrane needs to be laid flat on the ground, the multiple sets of rotating rollers 34 make elastic contact with the ground under the elastic support of spring 33. When passing the waterproof membrane, the multiple sets of rotating rollers 34 press the waterproof membrane downwards and into contact with the ground. The variable frequency motor 28 drives the reciprocating screw 30 to rotate, and the reciprocating screw 30 drives the second threaded block 2... 9 moves back and forth, and the second threaded block 29 drives the support plate 31, support column 32, spring 33, and rotating roller 34 to move back and forth, so that multiple sets of rotating rollers 34 reciprocate and squeeze the waterproof membrane. The servo motor 6 drives the threaded rod 7 to rotate, and the threaded rod 7 drives the first threaded block 8 to move upward. Under the sliding support of the roller 9 and the trolley 1, the first threaded block 8 drives the lifting plate 2, support frame 3, and U-shaped frame 4 to move upward to a specified height, which facilitates convenient height adjustment and avoids accidental contact by unauthorized personnel, thus completing the use of the flattening and laying device.

Claims

1. A device for flattening and laying waterproof membrane, characterized in that: The assembly includes a trolley (1) and a lifting plate (2). The lifting plate (2) is provided on the outside of the trolley (1). A support frame (3) is installed on the top of the lifting plate (2). A U-shaped frame (4) is installed on the side of the top of the lifting plate (2) away from the support frame (3). A shaped plate (5) is provided on the outside of the U-shaped frame (4). A stepper motor (10) is installed on the side wall of the support frame (3). A rotating shaft (11) is installed on the output end of the stepper motor (10). The rotating shaft (11) extends through the support frame (3) to its outside. A support shaft (13) is movably installed on the side wall of the support frame (3) outside the rotating shaft (11). The support shaft (13) extends through the support frame (3) to its outside. A first roller (14) is fitted on the surface of the rotating shaft (11) inside the support frame (3). The support frame (3) has internal support... A second roller (15) is fitted on the surface of the shaft (13). A synchronous belt pulley assembly (12) is fitted on the surface of the external rotating shaft (11) of the support frame (3). The end of the synchronous belt pulley assembly (12) away from the rotating shaft (11) is connected to the support shaft (13). A roller (16) is movably installed on the top side wall of the support frame (3). A first electric push rod (17) is movably installed at the bottom of the inside of the support frame (3). A movable shaft (18) is movably installed at the output end of the first electric push rod (17). A support frame (20) is provided on the outside of the support frame (3). Rotating shafts (19) are movably installed on both sides of the support frame (20). The support frame (20) is movably connected to the support frame (3) through the rotating shafts (19). The first electric push rod (17) is connected to the support frame (20) through the movable shaft (18).

2. The device for flattening and laying waterproof membrane according to claim 1, characterized in that: A power motor (21) is installed on the side wall of the U-shaped frame (4). A first shaft (22) is installed at the output end of the power motor (21). The first shaft (22) extends through the U-shaped frame (4) to its outside. A second heating roller (27) is fitted on the surface of the first shaft (22) inside the U-shaped frame (4).

3. The device for flattening and laying waterproof membrane according to claim 2, characterized in that: The top of the U-shaped frame (4) is symmetrically equipped with a second electric push rod (24), and the output end of the second electric push rod (24) is equipped with a lifting block (25). The second heating roller (27) is provided with a second shaft (23). Both sides of the second shaft (23) are connected to the lifting block (25). The surface of the second shaft (23) is fitted with a first heating roller (26). The lifting block (25) is slidably connected to the U-shaped frame (4).

4. The device for laying out waterproof membrane according to claim 1, characterized in that: Variable frequency motors (28) are symmetrically installed on the side wall of the lifting plate (2). Each variable frequency motor (28) has a reciprocating lead screw (30) installed at its output end. The reciprocating lead screw (30) extends to the side wall of the trolley (1) and is movably connected thereto.

5. The device for laying out waterproof membrane according to claim 4, characterized in that: The surface of each reciprocating lead screw (30) is fitted with a second threaded block (29), and each reciprocating lead screw (30) is threadedly connected to the second threaded block (29). The outside of the lifting plate (2) is provided with a support plate (31), and each second threaded block (29) is connected to the support plate (31).

6. The device for laying out waterproof membrane according to claim 5, characterized in that: The bottom end of each support plate (31) is equipped with a support column (32), and the surface of each support column (32) is fitted with a spring (33). The irregular plate (5) is slidably connected to the support column (32), and the irregular plate (5) is connected to the spring (33). The bottom end of the irregular plate (5) is movably equipped with three sets of rotating rollers (34) at equal intervals.

7. The device for laying out waterproof membrane according to claim 1, characterized in that: A servo motor (6) is installed at the top of the trolley (1), and a threaded rod (7) is installed at the output end of the servo motor (6). The threaded rod (7) extends through the trolley (1) and is movably connected to its interior. A first threaded block (8) is fitted on the surface of the threaded rod (7).

8. The device for laying out waterproof membrane according to claim 7, characterized in that: The threaded rod (7) is threadedly connected to the first threaded block (8), the first threaded block (8) is connected to the lifting plate (2), and rollers (9) are symmetrically and movably installed on the side wall of the lifting plate (2), and the rollers (9) are all slidably connected to the trolley (1).

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