Waterproof sheet joining device and waterproof sheet joining method

Abstract

To provide a waterproof sheet bonding device that can travel while stably keeping a proper travel speed, and a waterproof sheet bonding method using the waterproof sheet bonding device.SOLUTION: A waterproof sheet bonding device 1 has: a supply system 10 that supplies a liquid material to a waterproof sheet 100B; and a travel system 9 that has a vehicle body 91, a wheel 92B provided in the vehicle body 91 and rotatably supported, and a drive part 6 that drives the vehicle body 91, and travels together with the supply system 10 as the wheel 92B rotates. The drive part 6 has a driving source 60 and a force transmission part 80. The force generated by the driving source 60 is transmitted from the force transmission part 80 to the vehicle body 91, to rotate the wheel 92B, making the waterproof sheet bonding device 1 travel.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a waterproof sheet joining device and a waterproof sheet joining method. [Background technology]

[0002] In recent years, with the demand for higher durability in buildings, sheet waterproofing structures in which waterproof sheets are laid and constructed are being adopted on the rooftops and floors of verandas and the like of many buildings.

[0003] In this sheet waterproofing structure, when laying a waterproof sheet on the floor portion serving as the main body, a known configuration is used in which, for example, the edges of two waterproof sheets are overlapped one on top of the other and the overlapping portions are joined with adhesive.

[0004] When waterproof sheets are joined together at overlapping portions with an adhesive, it has been proposed to supply adhesive to the overlapping portions using a supplying device (see, for example, Patent Document 1).

[0005] The supply device described in Patent Document 1 has a tank for storing adhesive, a tube connected to the tank through which the adhesive passes, and a nozzle connected to the tip of the tube located opposite the tank and for discharging (supplying) the adhesive to the overlapping portion.

[0006] With this supply device, when the supply device is moved along the overlapping portion of the waterproof sheets, adhesive stored in a tank is supplied to the overlapping portion of the waterproof sheets from the tip of the nozzle via a tube, and then the upper waterproof sheet is pressed from the front side with a roller provided on the supply device, thereby joining the waterproof sheets at the overlapping portion.

[0007] However, with this type of supply device, after supplying adhesive to the overlapping portions of the waterproof sheets, the waterproof sheets are joined by rolling the overlapping portions with a roller. Therefore, the rolling of the overlapping portions with the roller must be performed at an appropriate timing. In other words, the supply device must be pushed out while maintaining an appropriate running speed.

[0008] Furthermore, this problem is not limited to cases where the supply device described in Patent Document 1 is used to supply adhesive stored in a tank to the overlapping areas of waterproof sheets, but also occurs when a solvent is stored in a tank as a liquid material instead of adhesive, and this solvent is supplied to the overlapping areas of waterproof sheets to weld them together using the solvent. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Publication number 05-012027 Summary of the Invention [Problem to be solved by the invention]

[0010] An object of the present invention is to provide a waterproof sheet joining device that can stably maintain an appropriate traveling speed while traveling, and a waterproof sheet joining method using such a waterproof sheet joining device. [Means for solving the problem]

[0011] These objects can be achieved by the present invention as set forth in (1) to (8) below. (1) A waterproof sheet joining device used when laying a waterproof sheet on a floor surface as a structure using a liquid material containing a solvent or adhesive, a supply system that supplies the liquid material to the waterproof sheet; a traveling system having a vehicle body, rotatably supported wheels provided on the vehicle body, and a drive unit that drives the vehicle body, and which travels along a forward direction together with the supply system by rotation of the wheels; The first waterproof sheet and the second waterproof sheet of the waterproof sheet are overlapped at their edges along the forward direction with the second waterproof sheet on the bottom, and the liquid material is supplied to the overlapping portion formed by this. The first waterproof sheet and the second waterproof sheet are joined together. The liquid material is supplied by the supply system to the overlapping portion where the first waterproof sheet and the second waterproof sheet overlap, and then the overlapping portion to which the liquid material has been supplied is rolled from the front side of the first waterproof sheet by a rotatably supported roller provided in the traveling system, The drive unit has a drive source and a force transmission unit, and transmits the force generated by the drive source to the vehicle body via the force transmission unit to rotate the wheels, thereby causing the waterproof sheet joining device to travel, The force transmission unit includes an axle provided corresponding to the wheel. a bit having a first bevel gear and attached to the drive source; a second bevel gear meshing with the first bevel gear; a first pulley fixed to the second bevel gear; a second pulley fixed to the axle; and a timing belt wound around the first pulley and the second pulley. and The aforementioned Rotation of the axle causes the wheel to rotate; the drive source has a motor, and the rotation axis of the motor is arranged along a vertical direction; When viewed from the axial direction of the axle, the axle is located on an extension of the rotation axis. and the first pulley and the second pulley. A waterproof sheet joining device characterized in that:

[0012] (2) The drive source is The aforementioned The waterproof sheet joining device according to (1) above is an electric screwdriver equipped with a motor, the electric screwdriver being detachably arranged on the vehicle body.

[0013] (3) The electric screwdriver includes a main body, the motor housed in the main body, and a front end protruding from the main body. Record A waterproof sheet joining device as described in (2) above, which has a chuck that rotates around the axis of the rotation shaft, and the rotational force of the chuck is transmitted to the vehicle body via the force transmission part.

[0014] (4) The waterproof sheet joining device according to (3) above, wherein the main body has a power switch for switching the motor on and off.

[0015] (5) A waterproof sheet joining device according to (3) or (4) above, wherein the main body has a rotation switch for switching the rotation direction of the chuck.

[0016] (6) A waterproof sheet joining device according to any one of (3) to (5) above, wherein the main body has a speed adjustment switch for changing the speed of the chuck.

[0018] ( 7 ) (1) above or ( 6 10. A waterproof sheet joining method comprising a joining step of joining the waterproof sheets using the waterproof sheet joining device described in any one of the above.

[0019] ( 8 In the joining step, the waterproof sheet joining device is run at a running speed appropriate for joining the waterproof sheets. 7 ) A waterproof sheet joining method described in the above. [Effects of the Invention]

[0020] According to the present invention, a waterproof sheet joining device is used to supply a liquid material containing a solvent or adhesive to the overlapping portion of two waterproof sheets, and then the upper waterproof sheet is rolled from the front side with a roller provided in the supply device, so that when the waterproof sheets are joined at their overlapping portion, the waterproof sheet joining device can be caused to travel while stably maintaining a traveling speed appropriate for joining the waterproof sheets. Therefore, a worker can use the waterproof sheet joining device to join the waterproof sheets at their overlapping portion with excellent precision. [Brief explanation of the drawings]

[0021] [Figure 1]1 is a perspective view showing an embodiment of a waterproof sheet joining device of the present invention. [Figure 2] FIG. 2 is a side view seen from the direction of arrow A in FIG. [Figure 3] FIG. 2 is a front view seen from the direction of arrow C in FIG. [Figure 4] FIG. 2 is a plan view seen from the direction of arrow B in FIG. [Figure 5] 2 is a schematic diagram showing the configuration of a supply system provided in the waterproof sheet joining device shown in FIG. 1. FIG. [Figure 6] 2 is a partially enlarged side view showing a pressing part provided in the waterproof sheet joining device shown in FIG. 1. FIG. [Figure 7] FIG. 2 is an exploded perspective view showing an example of the waterproof sheet in an installed state. [Figure 8] FIG. 2 is an exploded perspective view showing an example of the waterproof sheet in an installed state. [Figure 9] FIG. 8 is an exploded perspective view showing another example of the construction of the waterproof sheet shown in FIG. 7 in an installed state. DETAILED DESCRIPTION OF THE INVENTION

[0022] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A waterproof sheet joining device and a waterproof sheet joining method according to the present invention will be described in detail below with reference to preferred embodiments shown in the accompanying drawings.

[0023] The waterproof sheet joining device of the present invention is a waterproof sheet joining device used when laying a waterproof waterproof sheet on a floor surface as a structural body using a liquid material containing a solvent or adhesive, and is equipped with a supply system that supplies the liquid material to the waterproof sheet, a vehicle body, rotatably supported wheels that are equipped on the vehicle body, and a driving unit that drives the vehicle body, and a traveling system that travels along a forward direction together with the supply system by rotation of the wheels, and the waterproof sheet joining device is a waterproof sheet joining device that supplies the liquid material to an overlapping portion formed by overlapping a first waterproof sheet and a second waterproof sheet at their edges along the forward direction with the second waterproof sheet on the underside. The first waterproof sheet and the second waterproof sheet are joined by supplying the liquid material to the overlapping portion where the first waterproof sheet and the second waterproof sheet overlap, and after the liquid material is supplied to the overlapping portion where the first waterproof sheet and the second waterproof sheet overlap by the supply system, the overlapping portion to which the liquid material has been supplied is rolled from the front side of the first waterproof sheet by a rotatably supported roller provided in the running system, and the drive unit has a drive source and a force transmission unit, and is configured to transmit the force generated by the drive source to the vehicle body by the force transmission unit, rotating the wheels and running the waterproof sheet joining device.

[0024] With this configuration of the waterproof sheet joining device, a liquid material containing a solvent or adhesive is supplied to the overlapping portion of the waterproof sheets, and then the upper waterproof sheet is pressed from the front side with a roller provided in the supply device. This allows the waterproof sheet joining device to travel at a stable, maintained traveling speed appropriate for joining the waterproof sheets at the overlapping portion. Therefore, using the waterproof sheet joining device, workers can join the waterproof sheets at the overlapping portion with excellent precision. This waterproof sheet joining device is described in detail below.

[0025] <<Waterproof sheet joining device>> Figure 1 is an oblique view showing an embodiment of the waterproof sheet joining device of the present invention, Figure 2 is a side view seen from the direction of arrow A in Figure 1, Figure 3 is a front view seen from the direction of arrow C in Figure 1, Figure 4 is a plan view seen from the direction of arrow B in Figure 1, Figure 5 is a schematic diagram showing the configuration of the supply system provided in the waterproof sheet joining device shown in Figure 1, Figure 6 is a partially enlarged side view showing an enlarged pressing portion provided in the waterproof sheet joining device shown in Figure 1, Figure 7 is an exploded oblique view showing an example of the installed state of the waterproof sheet, Figure 8 is an exploded oblique view showing an example of the installed state of the waterproof sheet, and Figure 9 is an exploded oblique view showing another example of the configured state of the waterproof sheet shown in Figure 7.

[0026] For convenience of explanation, the upper side in Figures 1 to 3 and 5 to 9 will be referred to as "upper (or upper)" or "front side," and the lower side will be referred to as "lower (or lower)" or "rear side." The diagonally lower left side in Figures 1 and 7 to 9, the left side in Figures 2 and 5 to 6, the near side of the page in Figure 3, and the lower side in Figure 4 will be referred to as "front (or anterior)." The diagonally upper right side in Figures 1 and 7 to 9, the right side in Figures 2 and 5 to 6, the far side of the page in Figure 3, and the upper side in Figure 4 will be referred to as "rear (or rear)." As shown in Figures 1 to 6, three mutually orthogonal axes are the x-axis, y-axis, and z-axis. The xy plane containing the x-axis and y-axis is horizontal, and the z-axis is vertical.

[0027] The waterproof sheet joining device 1 (hereinafter sometimes simply referred to as the "joining device") shown in Figure 1 is a device used to join a waterproof waterproof sheet 100 at an overlapping portion 101 of the waterproof sheet 100 using a liquid material such as a solvent Q (soluble solvent) or an adhesive, but in this embodiment, we will explain the case where joining is performed by welding using the solvent Q.

[0028] Furthermore, the waterproof sheet 100 is laid (constructed) on a structural body, which may be, but is not limited to, a rooftop or a balcony, for example, and the waterproof sheet 100 is laid (constructed) on the floor surface (floor portion) of the structural body using the joining device 1.

[0029] Incidentally, the manner in which the waterproof sheets 100 are laid on the floor surface of the structure by joining the waterproof sheets 100 together at overlapping portions 101 where the edges overlap using the joining device 1 is not particularly limited, and examples include the manners shown in Figures 7 and 8.

[0030] The embodiment shown in FIG. 7 includes a strip-shaped waterproof sheet 100 (hereinafter sometimes referred to as "waterproof sheet 100A") and two waterproof sheets 100 (hereinafter sometimes referred to as "waterproof sheets 100B") that are wider than the waterproof sheet 100A. The waterproof sheets 100B are laid adjacent to each other with a gap between them on the floor surface of the building frame. The waterproof sheet 100A is laid from above so as to fill the gaps between the waterproof sheets 100B. The waterproof sheet 100A and each waterproof sheet 100B overlap at their edges to form overlapping portions 101, and these overlapping portions 101 become joining margins and are joined using a joining device 1, thereby laying the waterproof sheet 100 on the floor surface. In other words, the floor surface (floor portion) of the building frame is covered with the waterproof sheet 100, thereby waterproofing the floor surface of the building frame.

[0031] In the embodiment shown in FIG. 7, the waterproof sheet 100B can be replaced with a heat insulating panel 150B, i.e., a so-called "PVC steel plate." Specifically, as shown in FIG. 9, two adjacent heat insulating panels 150B are arranged with their edges butted together without any gap between them, and are fixed to the main building 160 in this state. A fire-resistant sheet 155 is then joined to cover the boundary 151 formed by the butted edges of the two heat insulating panels 150B, and a waterproof sheet 100A is further joined to encompass the area of ​​the boundary 151 where the fire-resistant sheet 155 is joined. A joining device 1 is used to join the waterproof sheet 100A to the boundary 151 between the heat insulating panels 150B via the fire-resistant sheet 155. By joining the waterproof sheet 100A, the floor surface formed by laying the heat insulating panels 150B on the main building 160 is waterproofed.

[0032] Here, the heat insulating panel 150B is composed of a substrate whose inner layer is made of various steel plates (metal plates) such as Galvalume steel plate (registered trademark) or stainless steel plate, or a heat insulating layer, and whose outermost layer is a waterproof layer (PVC layer) made of a sheet (waterproof sheet) having the same waterproof properties as the waterproof sheet 100B. That is, in the present invention, the waterproof layer formed on the substrate is also referred to as the waterproof sheet 100B (second waterproof sheet). In other words, in the embodiment shown in Figure 9, a joining device 1 is used to join the waterproof layer formed on the substrate to the waterproof sheet 100A.

[0033] Note that either one of the two heat insulating panels 150B shown in FIG. 9 may be made of a waterproof sheet 100B depending on the configuration of the main house 160 or the like.

[0034] In addition, in the embodiment shown in Figure 7, the two waterproof sheets 100B are arranged adjacent to each other with a gap between them, but this is not limited to this, and as shown in Figure 9, the two insulating panels 150B (in other words, the waterproof sheets 100B) can also be arranged so that the edges of the two insulating panels 150B are butted against each other without leaving any gap between them.

[0035] In the embodiment shown in Figure 8, waterproof sheets 100B (hereinafter, the upper one may be referred to as "waterproof sheet 100BA" and the lower one as "waterproof sheet 100BB") are laid parallel to the floor surface of the building frame, and overlap at their edges to form overlapping portion 101 (overlapping portion). This overlapping portion 101 serves as a joining margin, and the waterproof sheet 100 is laid on the floor surface by joining the sheets using joining device 1. In other words, the floor surface (floor portion) of the building frame is covered with waterproof sheet 100, thereby waterproofing the floor surface of the building frame.

[0036] In the embodiment shown in FIG. 8, the lower waterproof sheet 100BB of the two waterproof sheets 100B may be replaced with the heat insulating panel 150B described above.

[0037] In this embodiment, as an example, a case where the joining device 1 is used for joining in the manner shown in FIG. 8 will be described.

[0038] The constituent materials of the waterproof sheet 100 laid on the floor surface are not particularly limited, but examples include vinyl chloride resins such as polyvinyl chloride, polyolefin resins, and ethylene-vinyl acetate copolymers. One or a combination of two or more of these can be used, but polyvinyl chloride is preferred. Polyvinyl chloride has excellent solvent welding properties. Therefore, by welding the waterproof sheets 100 together using the solvent Q supplied from the joining device 1, the adhesion between the waterproof sheets 100 can be improved.

[0039] A joining device 1 is used to lay the waterproof sheet 100 on the floor surface of the building structure as described above, and as shown in Figure 1, this joining device 1 is equipped with a supply system 10 that supplies the solvent Q to the waterproof sheet 100, and a traveling system 9 that travels together with the supply system 10. The configuration of each part of the joining device 1 will be described below.

[0040] The traveling system 9 has a vehicle body 91 that travels together with the supply system 10, a pressing unit 7 having a roller 92A rotatably supported on the bottom of the vehicle body 91, a driving unit 6 that drives the vehicle body 91, and a handle 93 that is supported and fixed on the top of the vehicle body 91.

[0041] The vehicle body 91 includes a frame 94 and four wheels 92B rotatably supported on the lower part of the vehicle body 91 (frame 94).

[0042] The frame 94 has a top plate 941, and the top plate 941 alone constitutes the frame 94 in the shape of a flat plate.

[0043] As shown in FIGS. 1 to 4 , two pairs of wheels 92B are arranged on the underside of the frame 94 (top plate 941) at four corners of the top plate 941, with each pair facing each other. Each wheel 92B is rotatably supported by the top plate 941. The rotation of each wheel 92B allows the welding device 1 to travel together with the supply system 10. That is, by driving the drive unit 6 described below, the wheels 92B are rotated in the +x-axis direction, causing the vehicle body 91, i.e., the welding device 1, to move forward in the +x-axis direction, and the wheels 92B are rotated in the −x-axis direction, causing the vehicle body 91 to move backward in the −x-axis direction. When the welding device 1 moves forward in the +x-axis direction and backward in the −x-axis direction, the opposing wheels 92B each travel on a pair of wheel travel lines Lk along the x-axis direction (forward direction). More specifically, of the wheels 92B facing each other in the y-axis direction, the wheel 92B located on the +y-axis side travels on the wheel running line Lk1, and the wheel 92B located on the -y-axis side travels on the wheel running line Lk2.

[0044] In this embodiment, as shown in Figures 1 to 4 and 6, a total of five pressing portions 7 are connected to the vehicle body 91 in a line along the x-axis direction, between the wheels 92B facing each other in the y-axis direction, i.e., at positions between the paired wheel running lines Lk along the x-axis direction.

[0045] Each pressing portion 7 also has two side plates 71 arranged in the y-axis direction and facing each other with a gap between them, a roller 92A arranged between the two side plates 71, and two connecting members 72 connected to the two side plates 71, respectively.

[0046] In the pressing unit 7, the roller 92A is rotatably supported by the two side plates 71 via axles between the two side plates 71. Two connecting members 72, which are connected to the upper ends of the two side plates 71, are connected to the top plate 941, so that the roller 92A is rotatably supported with respect to the body 91 (top plate 941).

[0047] The rollers 92A have a width set large enough to encompass the width of the overlapping portion 101. As the vehicle body 91, i.e., the joining device 1, travels, the wheels 92B rotate, and the rollers 92A also rotate. Therefore, for example, when the vehicle body 91 is moved forward in the +x-axis direction by driving the drive unit 6 (described later), the wheels 92B rotate in the +x-axis direction, and the rollers 92A also rotate in the +x-axis direction. When the vehicle body 91 is moved backward in the -x-axis direction, the wheels 92B rotate in the -x-axis direction, and the rollers 92A also rotate in the -x-axis direction. When the vehicle body 91 moves forward in the +x-axis direction and backward in the -x-axis direction, the rollers 92A travel on a roller travel line Ls along the x-axis direction, between the pair of wheel travel lines Lk on which the opposing wheels 92B travel. The position at which this roller 92A runs corresponds to the overlapping portion 101 formed by the waterproof sheets 100BB and 100BA overlapping at their edges, and after solvent Q is supplied from a nozzle 5 provided in a supply system 10 described later, this overlapping portion 101 is rolled down from the front side of the waterproof sheet 100BA by the roller 92A, thereby joining the waterproof sheets 100BA and 100BB.

[0048] Furthermore, the roller 92A having such a configuration is arranged between two side plates 71 in the pressing section 7, and is further connected to the frame 94 (top plate 941) via two connecting members 72 connected to these two side plates 71, respectively.

[0049] The connecting member 72 has a shaft portion 74 connected to the top plate 941 so as to be slidable in the up and down direction, and a coil portion 73 that is coil-shaped (spring-shaped) and has the shaft portion 74 inserted into the inside thereof below the top plate 941. The shaft portion 74 is connected to the top plate 941 in a state where it resists the spring force of the coil portion 73.

[0050] The connecting member 72 having such a configuration allows the pressing portion 7 equipped with the roller 92A to be biased downward (negative z-axis direction) relative to the top plate 941 so as to be swingable in the vertical direction (z-axis direction) (see Figures 2, 3, and 6).

[0051] Therefore, the pressing unit 7, i.e., roller 92A, is biased downward (in the -z-axis direction) and can swing up and down (in the z-axis direction) relative to the top plate 941 (car body 91). Therefore, when the waterproof sheets 100BA and 100BB are joined by rolling the waterproof sheets 100BA from the front side with the roller 92A provided in the pressing unit 7, the magnitude of the load applied to the waterproof sheet 100BA can be set to a desired magnitude by inserting the coil portion 73, which has a different biasing force, into the shaft portion 74.

[0052] Furthermore, when joining waterproof sheets 100BA and 100BB, even if the floor on which waterproof sheet 100 is laid has unevenness, i.e., steps, roller 92A can be made to conform to the shape of these unevenness. Therefore, roller 92A can overcome these unevenness, and waterproof sheets 100BA and 100BB can be reliably joined even in waterproof sheet 100 corresponding to the position where the floor has unevenness.

[0053] Furthermore, as shown in Figures 2 and 6, a total of five pressing units 7, each equipped with a single roller 92A, are connected to the vehicle body 91 in a line along the x-axis direction, independently of each other. In this way, one roller 92A that can conform to the uneven shape is provided for each pressing unit 7, and multiple pressing units 7 (five in this embodiment) are connected to the vehicle body 91 independently along the x-axis direction. Therefore, each roller 92A can independently conform to the uneven shape without affecting the roller 92A adjacent to it in the x-axis direction. This allows the waterproof sheet 100BA and the waterproof sheet 100BB to be joined with greater precision.

[0054] 2 etc., the number of pressing units 7 arranged on the vehicle body 91 (frame 94), i.e., the number of rollers 92A arranged along the +x-axis direction, i.e., along the roller running line Ls, is five, but the number may be more or less than five, is not limited to this number, and may be one. However, by providing multiple pressing units as in this embodiment, the waterproof sheet 100BA and the waterproof sheet 100BB can be joined more reliably.

[0055] The drive unit 6 is coupled to the vehicle body 91 and has a drive source 60 and a force transmission unit 80, and drives the vehicle body 91 by transmitting the force generated by the drive source 60 to the vehicle body 91 via the force transmission unit 80. In other words, when the vehicle body 91 is driven by the operation of the drive unit 6, wheels 92B provided on the vehicle body 91 are rotated, causing the joining device 1 to move forward (travel) along the +x-axis direction or backward (travel) along the -x-axis direction.

[0056] The driving source 60 generates a force (power) to drive the vehicle body 91, and may be of any configuration that is capable of generating this power. For example, an engine, a motor, etc. may be used as the driving source 60, and the driving source 60 may be configured to be fixed to the vehicle body 91. In this embodiment, however, as shown in Figures 1 to 4, an electric screwdriver as a machine tool equipped with a motor is detachably arranged on the vehicle body 91 as the driving source 60.

[0057] As shown in Figures 1 to 4, the drive source 60 (electric screwdriver) has a main body 61, a motor housed in the main body 61, and a chuck 62 that protrudes from the main body 61 and rotates around the axis of the motor's rotation shaft.

[0058] The main body 61 has a gripping portion 63, which is provided with a power switch for turning the power supply (motor) on and off, a rotation switch for changing the direction of rotation of the motor and therefore the chuck 62, and a lever (speed adjustment switch) for changing the speed of the motor and therefore the chuck 62.

[0059] The main body 61 also has a built-in motor in its housing, powered by a battery detachably attached to the main body 61. The motor can be driven by turning on the power switch and stopped by turning off the power switch. The rotation direction of the motor can be switched between forward and reverse by operating the rotation switch. Furthermore, the speed at which the motor rotates can be adjusted by operating the lever. In other words, the motor can be rotated in the desired direction and speed by operating the various switches.

[0060] The chuck 62 is provided to protrude from the main body 61 and is configured to rotate around the same axis as the motor by being connected to a rotation shaft of a motor built into the main body 61.

[0061] A bit 81 provided in a force transmission unit 80 is detachably attached to the chuck 62, whereby the rotational force (force) generated by the rotation of the motor is transmitted to the force transmission unit 80.

[0062] In a drive source 60 (electric screwdriver) having such a configuration, when the power switch is turned on, the rotating shaft of the motor rotates, causing the chuck 62 connected to the rotating shaft to rotate around the same axis as the motor, and therefore the bit 81 attached to the chuck 62 and provided to the force transmission unit 80 also rotates around the same axis as the motor.

[0063] As shown in Figure 3 etc., the force transmission unit 80 has a bevel gear at the tip of the shaft, a bit 81 attached to the chuck 62 on this shaft side, a bevel gear 82 that meshes with and engages with the bevel gear of the bit 81 to convert rotational motion of the vertical axis to rotational motion of the horizontal axis, a pulley 83 connected and fixed concentrically to the bevel gear 82, one axle 86 provided corresponding to two wheels 92B arranged at each of the two front corners of the frame 94, a pulley 85 connected and fixed concentrically to the middle of the wheel 92B, and a timing belt 84 wound around the pulleys 83 and 85, and is arranged in the following order from the chuck 62 side to the wheel 92B side: bit 81, bevel gear 82, pulley 83, timing belt 84, pulley 85 and axle 86.

[0064] As a result, the bit 81 attached to the chuck 62 of the drive source 60 (electric screwdriver) and the wheel 92B of the vehicle body 91 are connected via the bevel gears, pulleys, timing belts, and axles. The number of bevel gears, pulleys, and timing belts provided in the force transmission unit 80 is not limited to the number provided in this embodiment.

[0065] When the power switch of the drive source 60 (electric screwdriver) is turned on, the rotation of the chuck 62 causes the bit 81 attached to the chuck 62 to rotate, as described above. The bevel gear of the bit 81 rotates by rotational motion about the vertical axis (see FIG. 3). The rotational force of the bit 81 rotating by rotational motion about the vertical axis is converted into rotational force that rotates by rotational motion about the horizontal axis and transmitted to the bevel gear 82, because the bevel gear of the bit 81 is meshed with the bevel gear 82. As a result, the pulley 83 is connected concentrically with the bevel gear 82, and therefore rotates by rotational motion about the horizontal axis together with the bevel gear 82. Therefore, the rotational force of the pulley 83 is transmitted to the pulley 85 via the timing belt 84, maintaining the rotational motion about the horizontal axis. A wheel 92B is concentrically connected to the pulley 85 via an axle 86, so that the wheel 92B rotates by a rotational motion about a horizontal axis in the same manner as the pulley 85 and the axle 86 rotate.

[0066] In this way, the torque (power) generated by the motor in the drive source 60 (electric screwdriver) is transmitted to the wheels 92B via the force transmission unit 80 as a torque that rotates by rotational motion around a horizontal axis. Therefore, by switching the rotation switch provided in the drive source 60 (electric screwdriver), the rotation direction of the wheels 92B can be selected between forward and reverse, allowing the vehicle body 91, i.e., the joining device 1, to be selectively moved forward or backward by its own propulsion. Furthermore, by switching the lever (speed adjustment switch) provided in the drive source 60 (electric screwdriver), the rotation speed of the wheels 92B can be adjusted, allowing the vehicle body 91, i.e., the joining device 1, to be set to a desired speed. Therefore, the joining device 1 can be moved forward at an appropriate traveling speed for joining the waterproof sheets 100BA and 100BB.

[0067] As described above, the joining device 1 is not manually advanced by an operator, but is self-propelled and advanced in the +x-axis direction by the operation of the drive unit 6. Since the drive unit 6 has the configuration described above, the joining device 1 can be reliably maintained at a set speed and travel (advance) stably. In other words, the joining device 1 can be reliably traveled (advance) while stably maintaining an appropriate travel speed for joining the waterproof sheets 100BA and 100BB. Therefore, the joining of the waterproof sheets 100BA and 100BB can be performed with excellent precision by the roller 92A of the pressing unit 7 rolling against the waterproof sheets 100BA.

[0068] Furthermore, in this embodiment, an electric screwdriver is used as the drive source 60 without using an engine, motor, or the like, and therefore, by detaching the electric screwdriver from the joining device 1 and attaching various processing bits (processing tools) to the chuck 62 instead of the bit 81, the electric screwdriver can be used for various machining operations. Furthermore, since an existing electric screwdriver is repurposed as the drive source 60 provided in the joining device 1, the joining device 1 can be manufactured at low cost. Furthermore, since the joining device 1 can be carried with the electric screwdriver detached from the joining device 1, the weight of the joining device 1 can be reduced when carried, and it can be carried relatively easily in narrow spaces, etc.

[0069] The handle 93 is supported and fixed to two poles 96 that protrude upward from each of the two rear corners of the frame 94 of the vehicle body 91. The worker performing the joining work of the waterproof sheet 100 can grip the handle 93 and, in that state, use the drive unit 6 to move the joining device 1 forward in the +x-axis direction or move the joining device 1 backward in the -x-axis direction.

[0070] The handle 93 is also provided with a lever 44 that is included in the supply system 10, which will be described below. By operating this lever 44, the worker can advance the joining device 1 in the +x-axis direction, and supply the solvent Q to the overlapping portion 101 when joining the waterproof sheets 100B together at the overlapping portion 101.

[0071] The supply system 10 is mounted on a vehicle body 91 equipped with the running system 9, and is a structure that supplies solvent Q to the waterproof sheet 100, more specifically, to the overlapping portion 101 where the waterproof sheets 100B overlap, while traveling together with the running system 9.

[0072] As shown in FIG. 5 and other figures, the supply system 10 includes a storage section 2 for storing the solvent Q, a flow path 31 communicating with the storage section 2 and through which the solvent Q from the storage section 2 passes, a nozzle 5 communicating with the flow path 31 and supplying (discharging) the solvent Q that has passed through the flow path 31 to an overlapping section 101 where the waterproof sheets 100B overlap, a flow rate adjusting section 41 for adjusting the flow rate of the solvent Q discharged from the nozzle 5, an on-off valve 43 for opening and closing the passage of the solvent Q in the flow path 31, and an air tank 48 for sending the solvent Q in the storage section 2 toward the nozzle 5 via the flow path 31. The air supply system has a flow path 32 that is connected to the storage section 2 and the air tank 48 and through which air passes when it is supplied from the air tank 48 to the storage section 2, and a supply amount adjustment section 47 that adjusts the amount of air supplied to the storage section 2. The air tank 48, supply amount adjustment section 47, storage section 2, flow rate adjustment section 41, on-off valve 43, and nozzle 5 are arranged in this order, with the air tank 48, supply amount adjustment section 47, and storage section 2 connected via the flow path 32, and the storage section 2, flow rate adjustment section 41, on-off valve 43, and nozzle 5 connected via the flow path 31.

[0073] Each part of the supply system 10 having such a configuration is disposed on a vehicle body 91 provided on the traveling system 9. Each part of the supply system 10 will be described below.

[0074] In this embodiment, the reservoir 2 is configured as a cylindrical tank (solvent tank) as shown in FIG.

[0075] This storage section 2 is fixed above the on-off valve 43 described later, which is arranged on the top plate 941, via the flow rate adjustment section 41 and the flow path 31, and is thereby arranged on the vehicle body 91.

[0076] The reservoir 2 stores a solvent Q, which is supplied to the overlapping portion 101 to weld the waterproof sheets 100B together (the waterproof sheets 100BA and 100BB) at the overlapping portion 101. Examples of the solvent Q include, but are not limited to, ketones such as tetrahydrofuran (THF), nitrobenzene, carbon tetrachloride, pyridine, ethyl acetate, cyclohexanone, and methyl ethyl ketone (MEK), and alcohols such as toluene, methyl alcohol, and isopropyl alcohol. One or more of these solvents can be used in combination, but tetrahydrofuran is preferred. Tetrahydrofuran is highly volatile and dissolves various resin materials. Therefore, it is a preferred solvent for welding the waterproof sheets 100B together.

[0077] This storage section 2 is connected at its bottom (lower end) to one end (base end) of a flow path 31 that communicates with a nozzle 5, and at its top (upper end) to the other end (tip end) of a flow path 32 that communicates with an air tank 48, so that when air is supplied to the storage section 2 from the air tank 48 via the flow path 32, the solvent Q stored in the storage section 2 is supplied to the nozzle 5 via the flow path 31.

[0078] Flow path 31 (first flow path) is liquid-tightly connected to the bottom of reservoir 2, flow rate adjuster 41, on-off valve 43, and nozzle 5, and is thereby disposed on vehicle body 91.

[0079] The flow path 31 has one end connected to the reservoir 2 and the other end connected to the nozzle 5, respectively, so that the solvent Q stored in the reservoir 2 is supplied to the nozzle 5.

[0080] The flow path 31 may be partially or entirely constituted by a metal or resin pipe through which the solvent Q passes.

[0081] The flow path 31 may be made up of a plurality of pipes connected via joints, or may be made up of a single pipe. The pipe may be bent or curved at one or more points along its length.

[0082] Nozzle 5 is connected in a liquid-tight manner to the other end (tip) of flow path 31, that is, the tip on the opposite side to reservoir 2, and is thereby disposed on vehicle body 91.

[0083] In this embodiment, the nozzle 5 is a flat, hollow metal body that communicates with the flow path 31 at its base end and, as shown in Figure 5, has a discharge port 51 at its tip end that opens rearward, i.e., toward the -x-axis direction, and discharges the solvent Q that has passed through the flow path 31 into the overlapping portion 101 between the waterproof sheets 100B. The solvent Q discharged from the discharge port 51 is used to bond the waterproof sheets 100B together, i.e., the waterproof sheets 100BA and 100BB. The nozzle 5 protrudes toward the -y-axis direction parallel to the xy plane. Further, the nozzle 5 may be provided with a reinforcing material for reinforcing the nozzle 5.

[0084] Furthermore, the solvent Q ejected from the outlet 51 of the nozzle 5 may take any form, such as a waterfall, droplets, or mist, by appropriately setting the shape of the outlet 51, the amount of air supplied in the supply amount adjustment unit 47, the flow rate of the solvent Q in the flow rate adjustment unit 41, etc.

[0085] As shown in Figures 1 and 5, when ejecting the solvent Q, the nozzle 5 is inserted from one side of the width of the waterproof sheet 100B, i.e., the +y-axis side, into the back side of the upper waterproof sheet 100BA (between the waterproof sheets 100BA and 100BB).

[0086] The supply system 10 has such a nozzle 5, and by discharging the solvent Q from this nozzle 5, the solvent Q is supplied to the overlapping portion 101 between the waterproof sheets 100B.

[0087] In this embodiment, the number of nozzles 5 provided in the supply system 10 is one, but is not limited to this and may be, for example, two or more.

[0088] Flow rate adjustment unit 41 is fixed above on-off valve 43 (described later) disposed on top plate 941 via flow path 31, and is thereby disposed on vehicle body 91. Flow rate adjustment unit 41 is also provided midway between reservoir 2 and nozzle 5, connected to flow path 31.

[0089] This flow rate adjusting unit 41 is configured with, for example, a variable throttle valve. As a result, the flow rate adjusting unit 41 can continuously adjust the flow rate of the solvent Q passing through the flow path 31 by changing the throttle opening. With this flow rate adjusting unit 41, the solvent Q can be supplied from the nozzle 5 in an appropriate amount, neither too much nor too little.

[0090] The flow rate adjusting unit 41 may be configured to adjust the flow rate of the solvent Q by manual operation, or may be configured to automatically adjust the flow rate of the solvent Q based on various conditions such as the viscosity of the solvent Q.

[0091] In this embodiment, a drain 46 is provided between the reservoir 2 and the flow rate adjuster 41, and is connected to the flow path 31. As a result, if air bubbles are mixed into the flow path 31, the air bubbles can be removed through the drain 46. When replacing the solvent Q, the unnecessary solvent Q stored in the reservoir 2 can be removed through the drain 46.

[0092] The on-off valve 43 is fixed on the top plate 941, and is thereby disposed on the vehicle body 91. The on-off valve 43 is also provided midway between the flow rate adjuster 41 and the nozzle 5, and is connected to the flow path 31.

[0093] 1 etc., is connected to a lever 44 provided on the handle 93 via a wire 45, and is configured so that the on-off valve 43 can be opened and closed by operating the lever 44. This allows the operator performing the joining work of the waterproof sheets 100 to switch on / off the supply of the solvent Q from the nozzle 5 to the overlapping portion 101 by operating the lever 44.

[0094] The air tank 48 is fixed onto the top plate 941, and is thereby disposed on the vehicle body 91.

[0095] The air tank 48 is a cylindrical tank that is configured to be connectable to a compressor (not shown) that can supply air, and is filled with mechanically compressed air (compressed air) using the compressor before the waterproof sheets 100B are joined together by the joining device 1. The compressor may be either automatic or manual. If the compressor is manual and lightweight, it may be built into the air tank 48.

[0096] One end (base end) of a flow path 32 communicating with the top of the storage section 2 is connected to the air tank 48, and by supplying compressed air to the storage section 2 via the flow path 32, the solvent Q stored in the storage section 2 can be pushed out of the storage section 2 via the flow path 31 communicating with the bottom of the storage section 2. Therefore, by supplying air to the storage section 2 from the air tank 48 via the flow path 32, the solvent Q stored in the storage section 2 can be ejected from the nozzle 5 via the flow path 31. In this manner, the air tank 48 is charged (filled) with compressed air, and the solvent Q stored in the storage section 2 is ejected from the nozzle 5 using the compressive force of the air charged in the air tank 48. Therefore, unlike a bonding device that employs a device configuration in which the ejection of the solvent Q from the nozzle 5 is performed based on the siphon principle, utilizing the height difference between the storage section (tank) and the nozzle, there are no restrictions on the location of the storage section. Therefore, in the present invention, since the reservoir 2 can be disposed at any position on the frame 94 (top plate 941), the design possibilities when manufacturing the bonding device 1 are widened.

[0097] Flow path 32 (second flow path) is airtightly connected to the top of reservoir 2, supply amount adjuster 47, and air tank 48, and is thereby disposed on vehicle body 91.

[0098] This flow path 32 has one end connected to the air tank 48 and the other end connected to the storage section 2, respectively, so that air loaded in a compressed state in the air tank 48 is supplied to the storage section 2.

[0099] The flow path 32 may be partially or entirely constituted by a metal or resin pipe through which air passes.

[0100] Like the flow path 31, the flow path 32 may be formed by connecting a plurality of pipes via joints, or may be formed by a single pipe.

[0101] Supply amount adjuster 47 is fixed onto top plate 941, and is thereby disposed on vehicle body 91. Supply amount adjuster 47 is also provided midway between reservoir 2 and air tank 48, and is connected to flow path 32.

[0102] This supply amount adjustment unit 47 is configured with, for example, a variable throttle valve. As a result, supply amount adjustment unit 47 can continuously adjust the flow rate of air passing through flow path 32 by changing the throttle opening. With such supply amount adjustment unit 47, it is possible to supply an appropriate amount of air from air tank 48 to storage unit 2, neither too much nor too little.

[0103] The supply amount adjustment unit 47 may be configured to adjust the amount of air supplied by manual operation, or may be configured to automatically adjust the amount of air supplied based on various conditions, such as the viscosity of the solvent Q to be pushed out by air.

[0104] Furthermore, either a check valve or a manual valve may be provided between the reservoir 2 and the supply amount adjustment unit 47, and connected to the flow path 32. By providing a check valve, it is possible to prevent the solvent Q from flowing back from the reservoir 2 to the air tank 48. Furthermore, by providing a manual valve, it is possible to reliably prevent the solvent Q from being discharged from the nozzle 5 even if an operator unintentionally operates the lever 44 when the bonding apparatus 1 is stopped.

[0105] In the supply system 10 configured as described above, prior to bonding the waterproof sheets 100B together using the bonding device 1, the air tank 48 is filled with compressed air using a compressor. The supply rate adjuster 47 adjusts the rate of air supplied from the air tank 48 to the storage unit 2, and the flow rate adjuster 41 adjusts the flow rate of the solvent Q from the storage unit 2 to the nozzle 5. This allows an appropriate supply rate of the solvent Q stored in the storage unit 2 to be discharged from the nozzle 5 when the operator operates the lever 44 to open the on-off valve 43. In other words, with the supply system 10 configured as described above, the supply rate of the solvent Q discharged from the nozzle 5 can be set to a desired amount by adjustments made by the supply rate adjuster 47 and the flow rate adjuster 41. This ensures that the supply rate can be reliably set to an appropriate amount for bonding the waterproof sheets 100B together. Therefore, in order to ensure that the waterproof sheet 100B is in a molten state at the overlapping portion 101, it is possible to accurately suppress or prevent a large amount of unnecessary solvent Q from being supplied to the overlapping portion 101, which is desirable from an economic and environmental perspective.

[0106] When joining the waterproof sheets 100B together using the joining device 1, the joining device 1 is advanced along the +x-axis direction, and the operator operates the lever 44 to open the on-off valve 43, thereby connecting the air tank 48, the storage unit 2, and the nozzle 5 via the flow paths 31 and 32 (see FIG. 5 ). At this time, compressed air is loaded into the air tank 48, and this air is supplied from the top of the storage unit 2 to the inside via the flow path 32, with the supply rate adjusted to an appropriate level by the supply rate adjuster 47. This supply of air to the storage unit 2 pushes the stored solvent Q in the storage unit 2 outward from the storage unit 2, i.e., toward the flow path 31 connected to the bottom of the storage unit 2. As a result, the solvent Q, with the flow rate adjusted to an appropriate level by the flow rate adjuster 41, is discharged from the nozzle 5 via the flow path 31, and the waterproof sheets 100B can be melted at the overlapping portion 101.

[0107] The nozzle 5 is located ahead of each roller 92A in the traveling direction of the vehicle body 91. Therefore, after the waterproof sheets 100B are melted in the overlapping portion 101, that is, after the solvent Q is supplied by the supply system 10 through the nozzle 5, the waterproof sheets 100B are rolled together from the front side at the overlapping portion 101 by the rollers 92A provided in the traveling system 9 (see Figures 1 and 2, etc.).

[0108] This rolling causes the waterproof sheets 100B, which have been melted by the supply of solvent Q, to be joined at the overlapping portion 101. As a result, waterproofing is ensured between the waterproof sheets 100BA and 100BB at the overlapping portion 101. The waterproof sheets 100 can be joined using the joining device 1 by supplying the solvent Q to the overlapping portion 101 via the nozzle 5 using the joining device 1 as described above, and then rolling the waterproof sheets 100B with the roller 92A after the supply of the solvent Q. The supply of the solvent Q and the rolling of the waterproof sheets 100B constitute a joining process (waterproof sheet joining method) using the joining device 1. After the joining process is completed, the nozzle 5 is removed from between the waterproof sheets 100B.

[0109] Furthermore, when joining waterproof sheets 100B together at the overlapping portion 101 using the joining device 1 as described above, as shown in Figures 1 and 4, in the running system 9, the roller 92A provided in the pressing unit 7 runs along the roller running line Ls along the overlapping portion 101, where the front side of the waterproof sheet 100BA (first waterproof sheet) is rolled and compressed, and in the supply system 10, the storage unit 2 mounted on the vehicle body 91 runs along a wheel running line Lk that is different from the roller running line Ls and parallel to the roller running line Ls.

[0110] The vehicle body 91 traveling on different lines Ls and Lk and the pressing part 7 are joined via a connecting member 72 provided in the pressing part 7. By this connecting member 72, the pressing part 7 is swingable in the vertical direction (z-axis direction) with respect to the vehicle body 91 (top plate 941) and is biased downward (-z-axis direction). Thereby, when the waterproof sheet 100BA is roll-pressed from the front side thereof by the roller 92A provided in the pressing part 7, the magnitude of the load can be set to a desired magnitude. Therefore, when the load applied to the waterproof sheet 100B by the roller 92A provided in the pressing part 7 is A [N] and the load applied to the waterproof sheet 100B by the supply system 10 including the storage part 2 mounted on the vehicle body 91 is B [N], it is configured to satisfy the relationship A < B.

[0111] Therefore, in the overlapping part 101, when roll-pressing from the front side of the waterproof sheet 100BA with the roller 92A, for example, even if a full amount of the solvent Q is stored in the storage part 2 and the self-weight of the vehicle body 91 increases, the roller 92A provided in the pressing part 7 can surely prevent a large load from being applied to the overlapping part 101, and the load A applied to the waterproof sheet 100B by the roller 92A can be set to an appropriate magnitude for joining the waterproof sheets 100B together. Thus, when joining the waterproof sheets 100B in the overlapping part 101, it is possible to accurately suppress or prevent wrinkles from occurring in the waterproof sheet 100B located in the overlapping part 101 and join the waterproof sheets 100B with excellent accuracy.

[0112] Also, as described above, when joining the waterproof sheets 100B in the overlapping part 101, due to the driving of the driving part 6, the joining device 1 can be self-driven while stably maintaining an appropriate traveling speed for joining the waterproof sheets 100B together. Therefore, from this point as well, the waterproof sheets 100B can be joined with excellent accuracy.

[0113] In the present embodiment, the case where the supply system 10 includes both the flow rate adjuster 41 and the supply amount adjuster 47 has been described, but the present invention is not limited to this case, and the supply system 10 may be one where either the flow rate adjuster 41 or the supply amount adjuster 47 is omitted. However, by configuring the supply system 10 to include both the flow rate adjuster 41 and the supply amount adjuster 47 as in the present embodiment, it becomes possible to adjust the amount of solvent Q discharged from the nozzle 5 with greater accuracy.

[0114] While the waterproof sheet joining device and waterproof sheet joining method of the present invention have been described above with reference to the illustrated embodiments, the present invention is not limited to these. Furthermore, each component of the waterproof sheet joining device can be replaced with any other component that can perform the same function. Furthermore, any other component may be added.

[0115] For example, the joining device 1 stores solvent Q as a liquid material in the storage section 2, and thereby supplies solvent Q from the nozzle 5 between the waterproof sheets 100B, but it is also possible to supply adhesive as a liquid material instead of solvent Q between the waterproof sheets 100B to join the waterproof sheets 100B together.

[0116] Furthermore, in the waterproof sheet joining method of the present invention, one or more steps can be added for any purpose. [Explanation of symbols]

[0117] 1 Waterproof sheet joining device 2. Storage section 5 nozzles 6 Drive unit 7 Pressing part 9. Running System 10 Supply system 31 Flow path 32 Flow path 41 Flow rate adjustment section 43 On-off valve 44 Lever 45 wire 46 Drain 47 Supply amount adjustment section 48 Air Tank 51 Discharge port 60 Drive source 61 Main body 62 Zipper 63 Gripping part 71 Side panel 72 Connecting member 73 Coil section 74 Shaft 80 Force transmission section 81 bits 82 Bevel gear 83 Pulley 84 Timing belt 85 Pulley 86 axles 91 Body 92A Roller 92B Wheel 93 Handle 94 frames 96 Paul 100 Tarpaulin 100A waterproof sheet 100B waterproof sheet 100BA waterproof sheet 100BB waterproof sheet 101 overlapping part 150B Insulation Panel 151 Boundary 155 Fireproof Sheet 160 Main house 941 Top plate A arrow B arrow C arrow Lk Wheel running line Lk1 Wheel running line Lk2 Wheel running line Ls roller running line Q Solvent

Claims

1. A waterproof sheet joining device used when laying a waterproof waterproof sheet on a floor surface as a structure using a liquid material containing a solvent or adhesive, a supply system that supplies the liquid material to the waterproof sheet; a traveling system having a vehicle body, rotatably supported wheels provided on the vehicle body, and a drive unit that drives the vehicle body, and which travels along a forward direction together with the supply system by rotation of the wheels; The first waterproof sheet and the second waterproof sheet of the waterproof sheet are overlapped at their edges along the forward direction, with the second waterproof sheet on the bottom, and the liquid material is supplied to the overlapping portion formed thereby, thereby joining the first waterproof sheet and the second waterproof sheet together; The liquid material is supplied to the overlapping portion where the first waterproof sheet and the second waterproof sheet overlap by the supply system, and then the overlapping portion to which the liquid material has been supplied is rolled from the front side of the first waterproof sheet by a rotatably supported roller provided in the traveling system, The drive unit has a drive source and a force transmission unit, and transmits the force generated by the drive source to the vehicle body via the force transmission unit to rotate the wheels, thereby causing the waterproof sheet joining device to travel, the force transmission unit has an axle provided corresponding to the wheel, a bit equipped with a first bevel gear and attached to the drive source, a second bevel gear meshing with the first bevel gear, a first pulley fixed to the second bevel gear, a second pulley fixed to the axle, and a timing belt wound around the first pulley and the second pulley, and rotates the wheel by rotation of the axle, the drive source has a motor, and the rotation axis of the motor is arranged along a vertical direction; A waterproof sheet joining device characterized in that the axle, the first pulley, and the second pulley are arranged on an extension of the rotation axis when viewed from the axial direction of the axle.

2. 2. The waterproof sheet joining device according to claim 1, wherein the drive source is an electric screwdriver equipped with the motor, and the electric screwdriver is detachably arranged on the vehicle body.

3. The waterproof sheet joining device described in claim 2, wherein the electric screwdriver has a main body, the motor housed in the main body, and a chuck protruding from the main body and rotating around the axis of the rotation shaft, and the rotational force of the chuck is transmitted to the vehicle body via the force transmission part.

4. The waterproof sheet joining device according to claim 3, wherein the main body has a power switch for switching the motor on and off.

5. The waterproof sheet joining device according to claim 3 or 4, wherein the main body has a rotation switch for switching the rotation direction of the chuck.

6. 6. The waterproof sheet joining device according to claim 3, wherein the main body has a speed adjusting switch for changing the speed of the chuck.

7. A waterproof sheet joining method, comprising a joining step of joining the waterproof sheets using the waterproof sheet joining device according to any one of claims 1 to 6.

8. 8. The waterproof sheet joining method according to claim 7, wherein in the joining step, the waterproof sheet joining device is run at a running speed appropriate for joining the waterproof sheets.

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