Waterproof Sheet Joining Device and Waterproof Sheet Joining Method

Abstract

To provide a waterproof sheet bonding device that can supply a liquid material containing a solvent or an adhesive to an overlapping portion between waterproof sheets to be supplied with the liquid material, in a proper amount of supply, which can be set to a desired amount of supply, 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 a wheel 92B rotatably supported and travels together with the supply system 10 as the wheel 92B rotates. The supply system 10 has a storage part 2, an air tank 48, a nozzle 5, a channel 31 and a channel 32. Compressed air is supplied from the air tank 48 to the storage part 2 through the channel 32, so that the air causes the liquid material in the storage part 2 to be pushed out to the channel 31 side, resulting in the liquid material to be discharged through the channel 31 from the nozzle 5 to the overlapping portion 101.SELECTED DRAWING: Figure 5

Description

Technical Field

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

Background Art

[0002] In recent years, with the demand for higher durability of buildings, a sheet waterproof structure in which a waterproof sheet is laid has been adopted on the floors of the roofs and verandas of many buildings.

[0003] In this sheet waterproof structure, in laying the waterproof sheet on the floor as a building body, for example, a configuration is known in which the edges of two waterproof sheets are overlapped vertically and the overlapping portion is joined by an adhesive.

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

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

[0006] In this supply device, the adhesive stored in the tank is supplied through the tube from the tip of the nozzle to the overlapping portion of the waterproof sheets, and then the upper waterproof sheet is rolled from the front side by a roller provided in the supply device, so that the waterproof sheets are joined at the overlapping portion.

[0007] And the supply device with such a configuration supplies the overlapping portion of the waterproof sheets from the adhesive tank through the tip of the nozzle by the siphon principle using the height difference between the tank and the nozzle. In addition to using this siphon principle, when the supply device is advanced, it is also conceivable to use the rotational force of the roller that rotates as the power for moving the adhesive from the tank to the tip of the nozzle.

[0008] However, in these cases, it has been technically difficult to set the supply amount of the adhesive supplied from the tip of the nozzle to the overlapping portion of the waterproof sheets to an appropriate amount for joining the waterproof sheets at the overlapping portion.

[0009] Moreover, such a problem occurs not only when using the supply device described in Patent Document 1 to supply the adhesive stored in the tank to the overlapping portion of the waterproof sheets, but also when a solvent is stored in the tank as a liquid material instead of the adhesive, and this solvent is supplied to the overlapping portion of the waterproof sheets to weld the waterproof sheets together with the solvent.

Prior Art Documents

Patent Documents

[0010]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0011] An object of the present invention is to provide a waterproof sheet joining device capable of supplying a liquid material containing a solvent or an adhesive to the overlapping portion of the waterproof sheets to be supplied with the liquid material at a desired supply amount, and a waterproof sheet joining method using such a waterproof sheet joining device.

Means for Solving the Problems

[0012] Such an object is achieved by the following (1) to (5 ) is achieved by the present invention described in (1) A waterproof sheet joining device used when laying a waterproof sheet having waterproof properties on a floor surface as a body using a liquid material containing a solvent or an adhesive, a supply system for supplying the liquid material to the waterproof sheet; a traveling system having rotatably supported wheels, and the traveling system travels along the forward direction together with the supply system by the rotation of the wheels; the liquid material is supplied to an overlapping portion formed by overlapping a first waterproof sheet and a second waterproof sheet of the waterproof sheet along the forward direction with the second waterproof sheet on the lower side at the edge, so that the first waterproof sheet and the second waterproof sheet are joined; 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 where the liquid material is supplied is rolled from the front side of the first waterproof sheet by a rotatably supported roller provided in the traveling system; the supply system has a storage portion for storing the liquid material, an air tank filled with compressed air, a nozzle for discharging the liquid material to the overlapping portion, a first flow path through which the liquid material passes, and a second flow path through which the air passes, and the air tank, the storage portion, and the nozzle are arranged in this order with the air tank and the storage portion communicating with each other through the second flow path and the storage portion and the nozzle communicating with each other through the first flow path; by supplying the compressed air from the air tank to the storage portion through the second flow path, in the storage portion, the liquid material is pushed out to the first flow path side by the air, and as a result, the liquid material is discharged from the nozzle to the overlapping portion through the first flow path; and The supply system is provided with a flow rate adjustment unit that is connected to the first flow path midway between the storage unit and the nozzle and adjusts the flow rate of the liquid material passing through the first flow path, and has an on-off valve provided midway between the flow rate adjustment unit and the nozzle and connected to the first flow path, the flow rate adjustment unit and the on-off valve are separate bodies, and is configured to be able to open and close the on-off valve by operating a lever connected to the on-off valve via a wire A waterproof sheet joining device characterized by the above.

[0013] (2) The second flow path has its tip connected to the top of the storage portion, and the first flow path has its base end connected to the bottom of the storage portion. The waterproof sheet joining device according to (1) above.

[0016] ( 3 ) The supply system has a supply amount adjustment unit that is connected to the second flow path midway between the air tank and the storage portion and adjusts the flow rate of the air passing through the second flow path. The waterproof sheet joining device according to (1) above or (2) described above.

[0017] ( 4 ) The air tank is configured to be filled with the air using a compressor that can supply the compressed air prior to laying the waterproof sheet on the floor surface by the waterproof sheet joining device. The waterproof sheet joining device according to any one of (1) to 3 ) above.

[0018] ( 5 ) A waterproof sheet joining method characterized by having a joining step of joining the waterproof sheets using the waterproof sheet joining device according to any one of (1) to 4 ) above.

Effect of the Invention

[0019] According to the present invention, when supplying a liquid material containing a solvent or an adhesive to the overlapping portion of the waterproof sheets using the waterproof sheet joining device, the supply amount of the liquid material supplied to this overlapping portion can be set to a desired amount. Therefore, the liquid material can be supplied to this overlapping portion in an appropriate supply amount for joining the waterproof sheets to each other. Accordingly, an operator can join the waterproof sheets to each other with excellent accuracy at the overlapping portion of the waterproof sheets using the waterproof sheet joining device.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0021] Hereinafter, the waterproof sheet joining device and the waterproof sheet joining method of the present invention will be described in detail based on the preferred embodiments shown in the accompanying drawings.

[0022] The waterproof sheet joining device of the present invention is a waterproof sheet joining device used when laying a waterproof sheet having waterproof properties on a floor surface as a body using a liquid material containing a solvent or an adhesive. The device includes a supply system for supplying the liquid material to the waterproof sheet and a traveling system having rotatably supported wheels, wherein the traveling system travels along the forward direction together with the supply system by the rotation of the wheels. The liquid material is supplied to an overlapping portion formed by overlapping a first waterproof sheet and a second waterproof sheet of the waterproof sheet with the second waterproof sheet on the lower side at the edge along the forward direction, thereby joining the first waterproof sheet and the second waterproof sheet. 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 where the liquid material is supplied is configured to be roll-pressed from the front side of the first waterproof sheet by a rotatably supported roller provided in the traveling system. The supply system has a storage portion for storing the liquid material, an air tank loaded with compressed air, a nozzle for discharging the liquid material to the overlapping portion, a first flow path through which the liquid material passes, and a second flow path through which the air passes. The air tank, the storage portion, and the nozzle are arranged in this order such that the air tank and the storage portion are communicated with each other through the second flow path, and the storage portion and the nozzle are communicated with each other through the first flow path. Compressed air is supplied from the air tank to the storage portion through the second flow path, so that in the storage portion, the liquid material is pushed out to the first flow path side by the air, and as a result, the liquid material is discharged from the nozzle to the overlapping portion through the first flow path.

[0023] By configuring the waterproof sheet joining device in such a manner, when supplying a liquid material containing a solvent or an adhesive to the overlapping portion between the waterproof sheets, the supply amount of the liquid material supplied to this overlapping portion can be set to a desired amount. Therefore, the liquid material can be supplied to this overlapping portion in an appropriate supply amount for joining the waterproof sheets to each other. Accordingly, an operator can join the waterproof sheets to each other with excellent accuracy at the overlapping portion between the waterproof sheets by using the waterproof sheet joining device. Hereinafter, this waterproof sheet joining device will be described in detail.

[0024] <<Waterproof Sheet Joining Device>> FIG. 1 is a perspective view showing an embodiment of the waterproof sheet joining device of the present invention, FIG. 2 is a side view seen from the direction of arrow A in FIG. 1, FIG. 3 is a front view seen from the direction of arrow C in FIG. 1, FIG. 4 is a plan view seen from the direction of arrow B in FIG. 1, FIG. 5 is a schematic diagram showing the configuration of a supply system provided in the waterproof sheet joining device shown in FIG. 1, FIG. 6 is a partially enlarged side view showing an enlarged pressing portion provided in the waterproof sheet joining device shown in FIG. 1, FIG. 7 is an exploded perspective view showing an example of the construction state of the waterproof sheet, FIG. 8 is an exploded perspective view showing an example of the construction state of the waterproof sheet, and FIG. 9 is an exploded perspective view showing another configuration example of the construction state of the waterproof sheet shown in FIG. 7.

[0025] In the following, for convenience of explanation, the upper side in FIGS. 1 to 3 and FIGS. 5 to 9 is referred to as "upper (or above)" or "front side", and the lower side is referred to as "lower (or below)" or "back side". Also, the diagonally lower left side in FIGS. 1 and 7 to 9, the left side in FIGS. 2 and 5 to 6, the front side of the paper surface in FIG. 3, and the lower side in FIG. 4 are referred to as "front (or forward)". Also, the diagonally upper right side in FIGS. 1 and 7 to 9, the right side in FIGS. 2 and 5 to 6, the back side of the paper surface in FIG. 3, and the upper side in FIG. 4 are referred to as "rear (or backward)". Also, as shown in FIGS. 1 to 6, three axes orthogonal to each other are defined as the x-axis, the y-axis, and the z-axis. The xy plane including the x-axis and the y-axis is horizontal, and the z-axis is vertical.

[0026] The waterproof sheet joining device 1 shown in Fig. 1 (hereinafter sometimes simply referred to as the "joining device") is a device used to join a waterproof sheet 100 having waterproof properties at the overlapping portion 101 of the waterproof sheet 100 using a solvent Q (soluble solvent) or an adhesive as a liquid material. In this embodiment, the case of joining by welding using the solvent Q will be described.

[0027] Further, the waterproof sheet 100 is laid (constructed) on the body. The body is not particularly limited. For example, it includes a roof, a veranda, etc. The waterproof sheet 100 is laid (constructed) on the floor surface (floor part) of the body using the joining device 1.

[0028] By the way, as a laying mode of the waterproof sheet 100 laid on the floor surface of the body by joining the waterproof sheets 100 to each other at the overlapping portion 101 where the edges overlap using the joining device 1, it is not particularly limited. For example, there are the modes shown in Figs. 7 and 8.

[0029] In the mode shown in Fig. 7, it 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 sheet 100B") having a width larger than that of the waterproof sheet 100A. The waterproof sheets 100B are laid adjacent to each other with a gap therebetween on the floor surface of the body. The waterproof sheet 100A is laid from above so as to fill the space between the waterproof sheets 100B. And the waterproof sheet 100A and each waterproof sheet 100B form an overlapping portion 101 by overlapping at the edges, and this overlapping portion 101 becomes a joining margin and is joined using the joining device 1, whereby the waterproof sheet 100 is laid on the floor surface. That is, the floor surface (floor part) of the body is covered with the waterproof sheet 100, and thereby, waterproofing is applied to the floor surface of the body.

[0030] In the embodiment shown in FIG. 7, the waterproof sheet 100B can also be replaced with a heat insulating panel 150B, that is, a so-called "vinyl chloride steel sheet" or the like. Specifically, as shown in FIG. 9, two adjacent heat insulating panels 150B are arranged such that their edges are butted against each other without opening the space between them, and in this state, they are fixed to the main house 160. Then, a fireproof sheet 155 is joined so as to cover a boundary portion 151 formed by butting the edges of the two heat insulating panels 150B against each other, and further, a waterproof sheet 100A is joined so as to include the region where the fireproof sheet 155 of the boundary portion 151 is joined. A joining device 1 is used for joining the waterproof sheet 100A to the boundary portion 151 between the heat insulating panels 150B via the fireproof sheet 155. By joining the waterproof sheet 100A in this way, waterproofing is applied to the floor surface formed by laying the heat insulating panel 150B on the main house 160.

[0031] Here, the heat insulating panel 150B is composed of a substrate consisting of various steel plates (metal plates) such as galvanized steel plate (registered trademark) or stainless steel plate and a heat insulating layer on the inner layer, and the outermost layer is composed of a waterproof layer (vinyl chloride layer) composed of a sheet (waterproof sheet) having waterproof properties similar to 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 FIG. 9, the joining device 1 is used for joining the waterproof layer formed on the substrate and the waterproof sheet 100A.

[0032] Note that, depending on the configuration of the main house 160 or the like, either one of the two heat insulating panels 150B shown in FIG. 9 can also be composed of the waterproof sheet 100B.

[0033] Also, in the embodiment shown in FIG. 7, the two waterproof sheets 100B are arranged adjacent to each other with a space opened between them, but it is not limited to this. As shown in FIG. 9, the two heat insulating panels 150B (in other words, the waterproof sheets 100B) can also be arranged such that their edges are butted against each other without opening the space between them.

[0034] In the embodiment shown in FIG. 8, waterproof sheets 100B laid parallel to the floor surface of the housing (hereinafter, the one located on the upper side may be referred to as "waterproof sheet 100BA" and the one located on the lower side may be referred to as "waterproof sheet 100BB") overlap at the edges to form an overlapping portion 101 (laminated portion). Then, this overlapping portion 101 serves as a bonding margin and is bonded using the bonding device 1, whereby the waterproof sheet 100 is laid on the floor surface. That is, the floor surface (floor portion) of the housing is covered with the waterproof sheet 100, and thereby, waterproofing is applied to the floor surface of the housing.

[0035] Note that, in the embodiment shown in FIG. 8, the lower waterproof sheet 100BB of the two waterproof sheets 100B may be replaced with the heat insulation panel 150B described above.

[0036] Also, in the present embodiment, as an example, the case where the bonding device 1 is used for bonding in the embodiment shown in FIG. 8 will be described.

[0037] The constituent material of the waterproof sheet 100 laid on the floor surface is not particularly limited. For example, vinyl chloride-based resins such as polyvinyl chloride, polyolefin-based resins, ethylene vinyl acetate copolymers, etc. may be mentioned, and one or more of these can be used in combination, but polyvinyl chloride is preferred. Polyvinyl chloride is excellent in solvent weldability. Therefore, by welding the waterproof sheets 100 together with the solvent Q supplied from the bonding device 1, the adhesion between the waterproof sheets 100 can be improved.

[0038] For laying the waterproof sheet 100 on the floor surface of the housing as described above, the bonding device 1 is used. As shown in FIG. 1, this bonding device 1 includes 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. Hereinafter, the configuration of each part included in the bonding device 1 will be described.

[0039] The running system 9 includes a vehicle body 91 that runs together with the supply system 10, a pressing part 7 having rollers 92A rotatably supported under the vehicle body 91, a driving part 6 that drives the vehicle body 91, and a handle 93 supported and fixed on the upper part of the vehicle body 91.

[0040] The vehicle body 91 includes a frame 94 and four wheels 92B rotatably supported under the vehicle body 91 (frame 94).

[0041] The frame 94 has a top plate 941, and the frame 94 in a flat plate shape is constituted by this top plate 941 alone.

[0042] As shown in FIGS. 1 to 4, on the frame 94 (top plate 941), at the four corners of the top plate 941, on the lower side thereof, two pairs of wheels 92B are arranged such that those forming a pair face each other. Each wheel 92B is rotatably supported by the top plate 941. And when each wheel 92B rotates, the joining device 1 can run together with the supply system 10. That is, by driving the driving part 6 described later to rotate each wheel 92B in the +x-axis direction, the vehicle body 91, that is, the joining device 1, moves forward in the +x-axis direction, and by rotating each wheel 92B in the -x-axis direction, the vehicle body 91 moves backward in the -x-axis direction. And when the joining device 1 moves forward in the +x-axis direction and moves backward in the -x-axis direction, the opposing wheels 92B travel along the wheel travel lines Lk forming a pair in the x-axis direction (forward direction), respectively. More specifically, among the wheels 92B facing each other in the y-axis direction, the wheel 92B located on the +y-axis direction side travels along the wheel travel line Lk1, and the wheel 92B located on the -y-axis direction side travels along the wheel travel line Lk2.

[0043] In this embodiment, as shown in FIGS. 1 to 4 and FIG. 6, the pressing part 7 is located between the wheels 92B facing each other in the y-axis direction, that is, between the wheel travel lines Lk forming a pair along the x-axis direction, and is connected to a total of five vehicle bodies 91 in a state along the x-axis direction.

[0044] Further, each pressing part 7 has two side plates 71 arranged in the y-axis direction and facing each other with a gap therebetween, a roller 92A disposed between the two side plates 71, and two connecting members 72 respectively connected to the two side plates 71.

[0045] In the pressing part 7, the roller 92A is rotatably supported between the two side plates 71 via axles on the two side plates 71. Then, at the upper ends of the two side plates 71, the two connecting members 72 respectively connected thereto are connected to the top plate 941, so that the roller 92A is rotatably supported with respect to the vehicle body 91 (top plate 941).

[0046] The width of this roller 92A is set to a size that can include the width of the overlapping part 101. As the vehicle body 91, that is, the bonding device 1 travels, the wheels 92B rotate, and this roller 92A also rotates. Therefore, for example, when the vehicle body 91 is advanced in the +x-axis direction by the drive of the drive part 6 described later, each wheel 92B rotates in the +x-axis direction, and further, the roller 92A also rotates in the +x-axis direction in the same manner. When the vehicle body 91 is reversed in the -x-axis direction, each wheel 92B rotates in the -x-axis direction, and further, the roller 92A also rotates in the -x-axis direction in the same manner. When the vehicle body 91 moves forward in the +x-axis direction and backward in the -x-axis direction, the roller 92A travels along a roller travel line Ls along the x-axis direction between the wheel travel lines Lk formed by pairs of opposing wheels 92B traveling. The position where this roller 92A travels corresponds to the overlapping part 101 formed by the overlapping of the waterproof sheet 100BB and the waterproof sheet 100BA at the edge. After the solvent Q is supplied from the nozzle 5 provided in the supply system 10 described later, the overlapping part 101 can be rolled and pressed from the front side of the waterproof sheet 100BA by the roller 92A to bond the waterproof sheet 100BA and the waterproof sheet 100BB.

[0047] Also, the roller 92A having such a configuration is disposed between the two side plates 71 in the pressing part 7, and is further connected to the frame 94 (top plate 941) via two connecting members 72 respectively connected to the two side plates 71.

[0048] The connecting member 72 has a shaft portion 74 connected to be slidable in the vertical direction with respect to the top plate 941, and a coil portion 73 formed in a coil shape (spring shape) with the shaft portion 74 inserted therein on the lower side of the top plate 941. The shaft portion 74 is connected to the top plate 941 against the spring force of the coil portion 73.

[0049] With the connecting member 72 having such a configuration, the pressing portion 7 provided with the roller 92A can be biased downward (-z-axis direction) so as to be swingable in the vertical direction (z-axis direction) with respect to the top plate 941 (see FIGS. 2, 3, and 6).

[0050] Therefore, the pressing portion 7, that is, the roller 92A, is biased downward (-z-axis direction) so as to be swingable in the vertical direction (z-axis direction) with respect to the top plate 941 (vehicle body 91). Thus, when joining the waterproof sheet 100BA and the waterproof sheet 100BB by rolling the waterproof sheet 100BA from the front side thereof with the roller 92A provided in the pressing portion 7, by inserting the coil portions 73 having different biasing forces through the shaft portion 74, the magnitude of the load applied to the waterproof sheet 100BA can be set to a desired magnitude.

[0051] Further, when joining the waterproof sheet 100BA and the waterproof sheet 100BB, even if there are irregularities, i.e., steps, formed on the floor portion where the waterproof sheet 100 is laid, the roller 92A can be made to follow the shape of the irregularities. Therefore, even in the waterproof sheet 100 corresponding to the position where the irregularities of the floor portion are formed where the roller 92A crosses the irregularities, the joining of the waterproof sheet 100BA and the waterproof sheet 100BB can be surely carried out.

[0052] Furthermore, as shown in FIGS. 2 and 6, the pressing portions 7 each having one roller 92A are independently connected to a total of five vehicle bodies 91 in a state along the x-axis direction and arranged side by side. In this way, one roller 92A capable of following the uneven shape is provided corresponding to one pressing portion 7, and a plurality (five in this embodiment) of pressing portions 7 are independently connected to the vehicle body 91 along the x-axis direction. Therefore, each roller 92A can independently follow the uneven shape without affecting the roller 92A adjacent to it in the x-axis direction. Thus, the joining of the waterproof sheet 100BA and the waterproof sheet 100BB can be carried out with higher accuracy.

[0053] Note that the number of pressing portions 7 arranged on the vehicle body 91 (frame 94), that is, the number of rollers 92A, is five along the +x-axis direction, that is, along the roller travel line Ls, in the configuration shown in FIG. 2 and the like. However, it may be more or less than five, and is not limited to that number, and may even be one. However, by providing a plurality as in this embodiment, the joining of the waterproof sheet 100BA and the waterproof sheet 100BB can be carried out more reliably.

[0054] The driving portion 6 is provided connected to the vehicle body 91 and has a driving source 60 and a power transmission portion 80. The force generated by the driving source 60 is transmitted to the vehicle body 91 by the power transmission portion 80 to drive the vehicle body 91. That is, by driving the vehicle body 91 by the operation of the driving portion 6, the joining device 1 is advanced along the +x-axis direction or retracted along the -x-axis direction.

[0055] The driving source 60 generates a force (power) for driving the vehicle body 91, and it may have any configuration as long as it can generate this power. For example, an engine, a motor, etc. can be used. However, in this embodiment, as shown in FIGS. 1 to 4, an electric driver as a working device equipped with a motor is detachably arranged on the vehicle body 91.

[0056] As shown in FIGS. 1 to 4, the drive source 60 (electric driver) has a main body portion 61, a motor housed in the main body portion 61, and a chuck 62 that protrudes from the main body portion 61 and rotates about the axis of the rotation shaft of the motor.

[0057] The main body portion 61 includes a gripping portion 63, and a power switch for switching on and off the power supply, a rotation switch for switching the rotation direction of the motor and thus the chuck 62, and a lever (speed adjustment switch) for switching the speed of the motor and thus the chuck 62 are respectively provided on the gripping portion 63.

[0058] Further, the main body portion 61 houses a motor that uses a battery detachably attached to the main body portion 61 as a power source inside the housing of the main body portion 61. By turning on the power switch, the motor can be driven, and by turning off the power switch, the motor can be stopped. Also, by operating the rotation switch, the rotation direction of the motor can be switched between forward rotation and reverse rotation. Furthermore, by operating the lever, the speed at which the motor rotates can be adjusted. That is, by operating various switches, the motor can be rotated in a desired rotation direction and at a desired speed.

[0059] The chuck 62 is provided to protrude from the main body portion 61 and is configured to rotate about the same axis as the motor by being connected to the rotation shaft of the motor housed in the main body portion 61.

[0060] And a bit 81 provided in the force transmission portion 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 portion 80.

[0061] In the drive source 60 (electric driver) having such a configuration, when the power switch is turned on, due to the rotation of the rotating shaft provided in the motor, the chuck 62 connected to the rotating shaft rotates around the same axis as the motor. Therefore, the bit 81 provided in the force transmission unit 80 attached to the chuck 62 also rotates around the same axis as the motor.

[0062] As shown in FIG. 3 and the like, the force transmission unit 80 includes a bevel gear at the tip of the shaft. On the shaft side, it meshes with the bit 81 attached to the chuck 62 and a bevel gear 82 that converts the rotational motion of the vertical axis to the horizontal axis. It also includes a pulley 83 concentrically connected and fixed to the bevel gear 82, a single axle 86 provided corresponding to two wheels 92B respectively arranged at two front corners of the frame 94, a pulley 85 concentrically connected and fixed in the middle of the wheel 92B, and a timing belt 84 looped around the pulley 83 and the pulley 85. From the chuck 62 side to the wheel 92B side, they are arranged in the order of the bit 81, the bevel gear 82, the pulley 83, the timing belt 84, the pulley 85, and the axle 86.

[0063] Thus, the bit 81 attached to the chuck 62 provided in the drive source 60 (electric driver) and the wheel 92B provided in the vehicle body 91 are in a connected state via bevel gears, pulleys, a timing belt, and an axle. Note that 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.

[0064] Then, in the drive source 60 (electric driver), when the power switch is turned on, as described above, due to the rotation of the chuck 62, the bit 81 mounted on the chuck 62 rotates. By this bit 81, the bevel gear provided on the bit 81 rotates by the rotational movement of the vertical axis (see Fig. 3). Since the rotational force of the bit 81 rotating by the rotational movement of the vertical axis is engaged with the bevel gear 82 by the bevel gear of the bit 81, the rotational force is converted into a rotational force that rotates by the rotational movement of the horizontal axis and transmitted to the bevel gear 82. As a result, since the pulley 83 is concentrically connected to the bevel gear 82, the pulley 83 rotates by the rotational movement of 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 while maintaining the rotational movement of the horizontal axis. And since the wheel 92B is concentrically connected to the pulley 85 via the axle 86, the wheel 92B rotates by the rotational movement of the horizontal axis like the pulley 85.

[0065] In this way, in the drive source 60 (electric driver), the generated rotational force (power) of the motor is transmitted to the wheel 92B as a rotational force that rotates by the rotational movement of the horizontal axis via the power transmission unit 80. Therefore, by switching the rotation switch provided in the drive source 60 (electric driver), since the rotation direction in which the wheel 92B rotates can be arbitrarily selected between forward rotation and reverse rotation, the vehicle body 91, that is, the joining device 1, can be selectively advanced or reversed by its self-running. Furthermore, by switching the lever (speed adjustment switch) provided in the drive source 60 (electric driver), since the speed at which the wheel 92B rotates can be adjusted, the speed of the vehicle body 91, that is, the joining device 1, can be set to a desired speed.

[0066] As described above, the joining device 1 does not advance the joining device 1 manually by the operator, but self-runs and advances in the +x-axis direction by the operation of the drive unit 6. Since the drive unit 6 has the configuration as described above, the joining device 1 can travel (advance) stably while maintaining the set speed. Therefore, the joining of the waterproof sheet 100BA and the waterproof sheet 100BB by the rolling pressure of the roller 92A provided in the pressing unit 7 against the waterproof sheet 100BA can be performed with excellent accuracy.

[0067] Further, in the present embodiment, since an electric driver is used as the drive source 60 without using an engine, a motor, or the like, the electric driver can be detached from the joining device 1, and by attaching various processing bits (processing tools) to the chuck 62 instead of the bit 81, the electric driver can also be used for various machining operations. Furthermore, since an existing electric driver is diverted as the drive source 60 provided in the joining device 1, the joining device 1 can be manufactured at low cost.

[0068] The handle 93 is supported and fixed to two poles 96 protruding upward from two corners on the rear side of the frame 94 in the vehicle body 91. An operator who performs the joining operation of the waterproof sheet 100 can hold the handle 93 and, in that state, perform operations such as advancing the joining device 1 in the +x-axis direction or retracting the joining device 1 in the -x-axis direction by driving the drive unit 6.

[0069] Further, the handle 93 is provided with a lever 44 provided in the supply system 10 described below. By operating this lever 44 by the operator, when the joining device 1 is advanced in the +x-axis direction to join the waterproof sheets 100B to each other at the overlapping portion 101, the solvent Q can be supplied to the overlapping portion 101.

[0070] The supply system 10 is a structure that is mounted on the vehicle body 91 provided in the traveling system 9 and supplies the solvent Q to the overlapping portion 101 where the waterproof sheets 100, more specifically, the waterproof sheets 100B overlap each other while traveling together with the traveling system 9.

[0071] As shown in Fig. 5 and the like, the supply system 10 includes a storage unit 2 for storing the solvent Q, a flow path 31 that communicates with the storage unit 2 and through which the solvent Q from the storage unit 2 passes, a nozzle 5 that communicates with the flow path 31 and supplies (ejects) the solvent Q that has passed through the flow path 31 to the overlapping portion 101 where the waterproof sheets 100B overlap, a flow rate adjustment unit 41 for adjusting the flow rate of the solvent Q ejected from the nozzle 5, an on-off valve 43 for opening and closing the passage of the solvent Q in the flow path 31, an air tank 48 for sending out the solvent Q in the storage unit 2 toward the nozzle 5 side through the flow path 31, a flow path 32 that communicates with the storage unit 2 and the air tank 48 and through which the air supplied from the air tank 48 to the storage unit 2 passes, and a supply amount adjustment unit 47 for adjusting the supply amount of the air supplied to the storage unit 2. The air tank 48, the supply amount adjustment unit 47, the storage unit 2, the flow rate adjustment unit 41, the on-off valve 43, and the nozzle 5 are arranged in this order, with the air tank 48, the supply amount adjustment unit 47, and the storage unit 2 communicating through the flow path 32, and the storage unit 2, the flow rate adjustment unit 41, the on-off valve 43, and the nozzle 5 communicating through the flow path 31.

[0072] Each part included in the supply system 10 having such a configuration is arranged on the vehicle body 91 included in the running system 9. Hereinafter, each part constituting this supply system 10 will be described.

[0073] In this embodiment, the storage unit 2 is configured by a cylindrical tank (solvent tank) as shown in Fig. 1.

[0074] This storage unit 2 is fixed above the on-off valve 43, which will be described later, and is arranged on the top plate 941 through the flow rate adjustment unit 41 and the flow path 31, and thus is arranged on the vehicle body 91.

[0075] The storage section 2 stores a solvent Q that is supplied to the overlapping section 101 to weld the waterproof sheets 100B (the waterproof sheet 100BA and the waterproof sheet 100BB) to each other at the overlapping section 101. The solvent Q is not particularly limited, and examples thereof include ketones such as tetrahydrofuran (THF), nitrobenzene, carbon tetrachloride, pyridine, ethyl acetate, cyclohexanone, and methyl ethyl ketone (MEK), alcohols such as toluene, methyl alcohol, and isopropyl alcohol, etc. One or a combination of two or more of these can be used, and among them, tetrahydrofuran is preferably used. Tetrahydrofuran is excellent in volatility and various resin materials show solubility. Therefore, it is preferable as a solvent used to weld the waterproof sheets 100B to each other.

[0076] One end (base end) of a flow path 31 that communicates with the nozzle 5 is connected to the bottom (lower end) of the storage section 2, and the other end (tip end) of a flow path 32 that communicates with the air tank 48 is connected to the top (upper end) thereof. By supplying air from the air tank 48 to the storage section 2 through the flow path 32, the solvent Q stored in the storage section 2 is configured to be supplied to the nozzle 5 through the flow path 31.

[0077] The flow path 31 (first flow path) is liquid-tightly connected to the bottom of the storage section 2, the flow rate adjustment section 41, the on-off valve 43, and the nozzle 5, and is thereby disposed on the vehicle body 91.

[0078] One end and the other end of this flow path 31 are respectively connected to the storage section 2 and the nozzle 5, whereby the solvent Q stored in the storage section 2 is supplied to the nozzle 5.

[0079] Further, the flow path 31 can be partially or entirely constituted by a metal or resin pipe through which the solvent Q passes.

[0080] Note that the flow path 31 may be formed by connecting a plurality of pipes via joints, or may be composed of a single pipe. Further, the pipe may be bent or curved at one or a plurality of locations along its longitudinal direction.

[0081] The nozzle 5 is liquid-tightly connected to the other end (tip) of the flow path 31, that is, the tip portion on the side opposite to the storage portion 2, and is thus disposed on the vehicle body 91.

[0082] In this embodiment, the nozzle 5 is formed of a flat metal hollow body. At its proximal end side, it communicates with the flow path 31. As shown in FIG. 5, at its distal end side, it opens rearward, that is, toward the -x-axis direction side, and has a discharge port 51 for discharging the solvent Q that has passed through the flow path 31 to the overlapping portion 101 between the waterproof sheets 100B. The solvent Q discharged from the discharge port 51 is used for joining the waterproof sheets 100B, that is, joining the waterproof sheet 100BA and the waterproof sheet 100BB. Note that the nozzle 5 protrudes toward the -y-axis direction side parallel to the xy plane. Further, the nozzle 5 may be provided with a reinforcing member for reinforcing the nozzle 5.

[0083] Furthermore, the solvent Q discharged from the discharge port 51 of the nozzle 5 may form any form such as a waterfall shape, a droplet shape, or a mist shape by appropriately setting the shape of the discharge port 51, the supply amount of air in the supply amount adjustment unit 47, the flow rate of the solvent Q in the flow rate adjustment unit 41, and the like.

[0084] As shown in FIGS. 1 and 5, when discharging the solvent Q, the nozzle 5 is inserted from one side in the width direction of the waterproof sheet 100B, that is, from the +y-axis direction side, to the back side of the upper waterproof sheet 100BA (between the waterproof sheet 100BA and the waterproof sheet 100BB).

[0085] 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.

[0086] Note that the number of nozzles 5 provided in the supply system 10 is one in this embodiment, but it is not limited thereto, and for example, two or more may be provided.

[0087] The flow rate adjustment unit 41 is disposed on the top plate 941 and is fixed above the on-off valve 43 described later via the flow path 31, whereby it is disposed on the vehicle body 91. Further, the flow rate adjustment unit 41 is provided connected to the flow path 31 midway between the storage unit 2 and the nozzle 5.

[0088] This flow rate adjustment unit 41 is constituted by, for example, a variable throttle valve. Thereby, the flow rate adjustment unit 41 can continuously adjust the flow rate of the solvent Q passing through the flow path 31 by changing the throttle opening degree. With such a flow rate adjustment unit 41, the solvent Q can be supplied from the nozzle 5 in an appropriate amount without excess or deficiency.

[0089] Note that the flow rate adjustment 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.

[0090] Further, in this embodiment, a drain 46 is provided connected to the flow path 31 between the storage unit 2 and the flow rate adjustment unit 41. Thereby, when air bubbles are mixed into the flow path 31, these air bubbles can be removed via this drain 46. Also, when replacing the solvent Q, the unnecessary solvent Q stored in the storage unit 2 can be extracted from the drain 46.

[0091] The on-off valve 43 is fixed on the top plate 941, whereby it is disposed on the vehicle body 91. Further, the on-off valve 43 is provided connected to the flow path 31 midway between the flow rate adjustment unit 41 and the nozzle 5.

[0092] This on-off valve 43 is constituted by, for example, a throttle valve, and as shown in FIG. 1 and the like, it is connected to a lever 44 provided on a handle 93 via a wire 45, and is configured to be able to open and close the on-off valve 43 by operating the lever 44. Thereby, by the operator operating the lever 44 who performs the joining operation of the waterproof sheet 100, it is possible to switch the on / off of the supply of the solvent Q to the overlapping portion 101 from the nozzle 5.

[0093] The air tank 48 is fixed on the top plate 941, and thereby is arranged on the vehicle body 91.

[0094] This air tank 48 is composed of a cylindrical tank, and is configured to be able to connect a compressor (not shown) that can supply air. Prior to the joining of the waterproof sheets 100B by the joining device 1, mechanically compressed air (compressed air) is loaded using the compressor. Note that this compressor may be either automatic or manual. Also, in the case of a manual one with a light weight, this compressor may be built into the air tank 48.

[0095] One end (base end) of a flow path 32 communicating with the top of the storage section 2 is connected to this air tank 48, and by supplying compressed air to the storage section 2 through the flow path 32, the solvent Q stored in the storage section 2 can be pushed out from the storage section 2 through a flow path 31 communicating with the bottom of the storage section 2. Therefore, by supplying air to the storage section 2 through the flow path 32 by the air tank 48, the solvent Q stored in the storage section 2 can be discharged from the nozzle 5 through the flow path 31. In this way, the air tank 48 is filled (loaded) with compressed air, and the compressed force of the air loaded in this air tank 48 is used to form a configuration in which the solvent Q stored in the storage section 2 is discharged from the nozzle 5. Therefore, unlike a bonding device that employs a device configuration in which the discharge of the solvent Q from the nozzle 5 is carried out by the siphon principle using the height difference between the storage section (tank) and the nozzle, there is no restriction on the position where the storage section is arranged. Therefore, in the present invention, since the storage section 2 can be arranged at an arbitrary position on the frame 94 (top plate 941), the design width when manufacturing the bonding device 1 is widened.

[0096] The flow path 32 (second flow path) is airtightly connected to the top of the storage section 2, the supply amount adjustment section 47, and the air tank 48, and is thus arranged on the vehicle body 91.

[0097] One end and the other end of this flow path 32 are respectively connected to the air tank 48 and the storage section 2, whereby the air loaded in the air tank 48 in a compressed state is supplied to the storage section 2.

[0098] Further, the flow path 32 can be partially or entirely constituted by a metal or resin pipe through which air passes.

[0099] Note that, similar to the flow path 31, the flow path 32 may be composed of a plurality of pipes connected via joints, or may be constituted by a single pipe.

[0100] The supply amount adjustment unit 47 is fixed on the top plate 941, and thereby is disposed on the vehicle body 91. Further, the supply amount adjustment unit 47 is provided connected to the flow path 32 midway between the storage unit 2 and the air tank 48.

[0101] This supply amount adjustment unit 47 is constituted by, for example, a variable throttle valve. Thereby, the supply amount adjustment unit 47 can continuously adjust the flow rate of the air passing through the flow path 32 by changing the throttle opening degree. With such a supply amount adjustment unit 47, air can be supplied from the air tank 48 to the storage unit 2 in an appropriate amount without excess or deficiency.

[0102] Note that the supply amount adjustment unit 47 may be configured to adjust the supply amount of air by manual operation, or may be configured to automatically adjust the supply amount of air based on various conditions such as the viscosity of the solvent Q extruded by air, for example.

[0103] Also, between the storage unit 2 and the supply amount adjustment unit 47, either a check valve or a manual valve may be provided connected to the flow path 32. By providing a check valve, backflow of the solvent Q from the storage unit 2 to the air tank 48 can be prevented. Also, by providing a manual valve, even if an operator inadvertently operates the lever 44 when the joining device 1 is stopped, it is possible to surely prevent the solvent Q from being discharged from the nozzle 5.

[0104] In the supply system 10 having such a configuration, prior to the joining of the waterproof sheets 100B by the joining device 1, compressed air is loaded into the air tank 48 using a compressor. Further, the supply amount of air from the air tank 48 to the storage section 2 is adjusted by the supply amount adjustment section 47, and the flow rate of the solvent Q from the storage section 2 to the nozzle 5 is adjusted by the flow rate adjustment section 41. As a result, when the operator operates the lever 44 and the on-off valve 43 is opened, the solvent Q stored in the storage section 2 is adjusted to be discharged from the nozzle 5 at an appropriate supply amount. That is, according to the supply system 10 having such a configuration, the supply amount of the solvent Q discharged from the nozzle 5 can be set to a desired amount by the adjustment of the supply amount adjustment section 47 and the flow rate adjustment section 41. Therefore, it is possible to surely set this supply amount to an appropriate amount for joining the waterproof sheets 100B. Accordingly, in order to surely melt the waterproof sheet 100B in the overlapping portion 101, it is possible to accurately suppress or prevent a large amount of the solvent Q in an unnecessary amount from being supplied to the overlapping portion 101, which is desirable from the economic and environmental aspects.

[0105] When joining the waterproof sheets 100B by the joining device 1, while advancing the joining device 1 along the +x-axis direction, the operator operates the lever 44 to open the on-off valve 43, thereby communicating the air tank 48, the storage section 2, and the nozzle 5 via the flow paths 31 and 32 (see FIG. 5). At this time, since the air tank 48 is filled with compressed air, this air is supplied into the storage section 2 from the top of the storage section 2 in a state where it is adjusted to an appropriate supply amount by the supply amount adjustment section 47 via the flow path 32. By supplying this air to the storage section 2, the stored solvent Q in the storage section 2 is pushed out to the outside of the storage section 2, that is, the side of the flow path 31 connected to the bottom of the storage section 2. As a result, the solvent Q adjusted to an appropriate flow rate by the flow rate adjustment section 41 is discharged from the nozzle 5 via the flow path 31, and the waterproof sheet 100B can be melted in the overlapping portion 101.

[0106] And in the traveling direction of the vehicle body 91, the nozzle 5 is positioned in front of each roller 92A. Therefore, after the waterproof sheet 100B is melted at the overlapping portion 101, that is, after the solvent Q is supplied through the nozzle 5 by the supply system 10, the waterproof sheets 100B are roll-pressed from their front sides at the overlapping portion 101 by the roller 92A provided in the traveling system 9 (see FIGS. 1, 2, etc.).

[0107] By this roll-pressing, the waterproof sheets 100B melted by the supply of the solvent Q are joined at the overlapping portion 101. As a result, the waterproof property between the waterproof sheet 100BA and the waterproof sheet 100BB at the overlapping portion 101 is ensured. By supplying the solvent Q to the overlapping portion 101 through the nozzle 5 and roll-pressing the waterproof sheet 100B by the roller 92A after the supply of this solvent Q, using the joining device 1 as described above, the waterproof sheet 100 can be joined using the joining device 1, and the supply of these solvents Q and the roll-pressing of the waterproof sheet 100B constitute a joining process (waterproof sheet joining method) using the joining device 1. After the completion of the joining process, the nozzle 5 is removed from between the waterproof sheets 100B.

[0108] Also, in the joining of the waterproof sheets 100B at the overlapping portion 101 using the joining device 1 as described above, as shown in FIGS. 1 and 4, in the traveling system 9, the roller 92A provided in the pressing portion 7 travels along the roller traveling line Ls where the front side of the waterproof sheet 100BA (first waterproof sheet) is roll-pressed on the overlapping portion 101, and in the supply system 10, the storage portion 2 mounted on the vehicle body 91 travels along a wheel traveling line Lk that is different from the roller traveling line Ls and parallel to the roller traveling line Ls.

[0109] 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 biased downward (-z-axis direction). Thereby, the magnitude of the load when the roller 92A provided in the pressing part 7 rolls the waterproof sheet 100BA from its front side 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.

[0110] Therefore, in the overlapping part 101, when rolling 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 surely prevents 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. Thus, when joining the waterproof sheets 100B in the overlapping part 101, wrinkles occurring in the waterproof sheet 100B located in the overlapping part 101 can be accurately suppressed or prevented, and the waterproof sheets 100B can be joined with excellent accuracy.

[0111] In addition, in this embodiment, the case where the supply system 10 has both the flow rate adjustment part 41 and the supply amount adjustment part 47 has been described, but it is not limited to this case. The supply system 10 may be one in which either the flow rate adjustment part 41 or the supply amount adjustment part 47 is omitted. However, by configuring the supply system 10 to have both the flow rate adjustment part 41 and the supply amount adjustment part 47 as in this embodiment, the discharge amount of the solvent Q discharged from the nozzle 5 can be adjusted with more excellent accuracy.

[0112] As described above, the waterproof sheet joining device and the waterproof sheet joining method of the present invention have been explained with respect to the illustrated embodiments, but the present invention is not limited thereto. Further, each part constituting the waterproof sheet joining device can be replaced with any configuration that can exhibit the same function. Also, any components may be added.

[0113] For example, in the joining device 1, the solvent Q was stored in the storage section 2 as a liquid material, and thereby the solvent Q was supplied between the waterproof sheets 100B from the nozzle 5. However, instead of the solvent Q, an adhesive can be supplied as a liquid material between the waterproof sheets 100B to join the waterproof sheets 100B together.

[0114] Also, in the waterproof sheet joining method of the present invention, one or more steps can be added for any purpose.

Explanation of Reference Numerals

[0115] 1 Waterproof sheet joining device 2 Storage section 5 Nozzle 6 Driving section 7 Pressing section 9 Traveling 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 Driving source 61 Main body section 62 Chuck 63 Gripping section 71 Side plate 72 Connecting member 73 Coil section 74 Shaft section 80 Force transmission section 81 Bit 82 Bevel gear 83 Pulley 84 Timing Belt 85 Pulley 86 Axle 91 Vehicle Body 92A Roller 92B Wheel 93 Steering Wheel 94 Frame 96 Pole 100 Waterproof Sheet 100A Waterproof Sheet 100B Waterproof Sheet 100BA Waterproof Sheet 100BB Waterproof Sheet 101 Overlap Portion 150B Heat Insulation Panel 151 Boundary Portion 155 Fireproof Sheet 160 Main Building 941 Ceiling A Arrow B Arrow C Arrow Lk Wheel Travel Line Lk1 Wheel Travel Line Lk2 Wheel Travel Line Ls Roller Travel Line Q Solvent

Claims

1. A waterproof sheet joining device used when laying a waterproof sheet having waterproof properties on a floor surface as a body using a liquid material containing a solvent or an adhesive, a supply system for supplying the liquid material to the waterproof sheet, a traveling system having rotatably supported wheels, and the traveling system travels along the forward direction together with the supply system by the rotation of the wheels, the liquid material is supplied to an overlapping portion formed by overlapping a first waterproof sheet and a second waterproof sheet of the waterproof sheet along the forward direction with the second waterproof sheet on the lower side at the edge, whereby the first waterproof sheet and the second waterproof sheet are joined, 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 where the liquid material is supplied is configured to be roll-pressed from the front side of the first waterproof sheet by a rotatably supported roller provided in the traveling system, the supply system has a storage portion for storing the liquid material, an air tank filled with compressed air, a nozzle for discharging the liquid material to the overlapping portion, a first flow path through which the liquid material passes, and a second flow path through which the air passes, and the air tank, the storage portion, and the nozzle are arranged in this order with the air tank and the storage portion communicating with each other via the second flow path and the storage portion and the nozzle communicating with each other via the first flow path, compressed air is supplied from the air tank to the storage portion via the second flow path, so that in the storage portion, the liquid material is pushed out to the first flow path side by the air, and as a result, the liquid material is discharged from the nozzle to the overlapping portion via the first flow path, the supply system has a flow rate adjustment portion provided connected to the first flow path in the middle between the storage portion and the nozzle for adjusting the flow rate of the liquid material passing through the first flow path, and an on-off valve provided connected to the first flow path in the middle between the flow rate adjustment portion and the nozzle, the flow rate adjustment portion and the on-off valve are separate bodies, A waterproof sheet joining device, characterized in that the on-off valve can be opened and closed by operating a lever connected to the on-off valve via a wire.

2. The waterproof sheet joining device according to claim 1, wherein the tip of the second flow path is connected to the top of the storage portion, and the base end of the first flow path is connected to the bottom of the storage portion.

3. The supply system according to claim 1 or 2, further comprising a supply amount adjustment unit connected to the second flow path and adjusting the flow rate of the air passing through the second flow path, in the middle of the air tank and the storage portion.

4. The air tank according to any one of claims 1 to 3, is configured to be filled with the air by using a compressor capable of supplying the compressed air prior to laying the waterproof sheet on the floor surface by the waterproof sheet joining device.

5. A waterproof sheet joining method, comprising a joining step of joining the waterproof sheet by using the waterproof sheet joining device according to any one of claims 1 to 4.

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