JPH0726120U - Tarpaulin welding machine - Google Patents

Abstract

(57) [Summary] [Purpose] To solve the manual work, to facilitate solvent welding and to simplify construction. [Structure] A pressing roll 3 is provided at a tip of a grip portion 1 via a frame 2, a support 5 is projected on a roll shaft 4 of the roll 3, an opening member 6 is provided at a tip of the support 5, and the roll is provided. 3 and an opening member 6 are provided with a spray nozzle 7, the tip of a solvent hose 8 is connected to the nozzle 7, and the other end of the hose 8 is connected with a solvent tank 9, and the hose 1 is connected to the hose 1. 8 is provided with a stopper 10 for crushing and opening, and a spray nozzle is provided with one or a plurality of holes, an opening member 6 is provided with a guide 12, a plurality of rolls 3 are provided, or a spray nozzle 7 is provided. A solvent discharge amount adjusting valve 14 is provided between the stopper 10 and the stopper 10. [Effect] The solvent can be uniformly and evenly applied to the upper and lower waterproof sheets, the adhesive strength is increased, the swelling of the waterproof sheet can be prevented, and the adhesive portion is not peeled off with time.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a waterproof sheet welding machine for joining (welding) overlapping portions (joints) of end portions of a waterproof sheet laid on the roof of a structure or a water tank.

[0002]

[Prior art]

 Conventionally, the waterproof sheet that is laid on the roof of this type of structure or water tank has a width of about 1 to 2 m, so when laying it, the edges of the sheets are overlapped by a certain width and watertightly joined. It is necessary to. As the joining method, there are employed a fusion method of adhering with an adhesive, a sheet of which is melted with hot air and pasted, or a method of welding with a solvent in which the sheets are dissolved and joined. Among the above waterproof sheet joining methods, the method using solvent welding is a powerful joining method that has a strong joining force and excels in water-tightness over a long period of time because it joins sheets that have been superposed by a solvent by melting them. It began to take place.

[0003]

[Problems to be solved by the device]

 However, the method of joining sheets by solvent welding is a manual method in which craftsmen apply the solvent to the overlapping portions of the sheets using a brush or the like. Such a manual method requires skill of a craftsman, and the solvent is liable to be sloppy, which does not bond on average and causes peeling from a place with little or weak adhesion. There was a problem that the swelling occurred as well as being thin. In order to solve such a problem, a machine for coating a solvent or an adhesive is known, but in the conventional coating machine, a tank for storing the adhesive or the solvent is integrated with the roll section. However, it had poor mobility and workability and was difficult to handle.

[0004]

Means for Solving the Problems In order to solve the above problems, the present invention provides a pressing roll at the tip of a grip through a frame, and a supporting body projects from a roll shaft of the roll. An opening material is provided at the tip approximately parallel to the pressing roll, and a spray nozzle is provided between the roll and the opening member.The tip of the solvent hose is connected to the nozzle, and the other end of the solvent hose is connected to the solvent tank. In this way, a stopper for crushing and opening the hose at the grip to adjust the discharge of the solvent is provided, and the solvent hose is pierced through the inside of the grip and one or more spray nozzles are provided. Hole (discharge port), a guide for contacting the side edge of the overlapping width of the waterproof sheet, or a plurality of the rolls are provided in the opening member.

[0005]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings.

The waterproof sheet welding machine of the present invention includes an opening member 6 which is inserted between an upper waterproof sheet a and a lower waterproof sheet b that are stacked to lift the upper waterproof sheet a, In order to spray the solvent between the pressing roll 3 connected to the opening member 6 by the support 5, the grip portion 1 connected to the frame 2 supporting the roll 3, and the opening member 6 and the pressing roll 3. A spray nozzle 7 having one or a plurality of holes at its tip, and the pressing roll 3 and the opening member 6 are supported by hinges on one or both sides of the roll support shaft 4 with the shaft as a center (fulcrum). 5 is rotatably connected and projected, and the solvent hose 8 is connected to the spray nozzle 7 fixed to the support 5 so that its tip is positioned between the pressing roll 3 and the opening member 1 and the rear end is Melted through the inside of the grip 1. A stopper 10 for controlling the flow of the solvent by crushing and releasing the solvent hose 8 is provided inside the grip portion 1 so as to be connected to the agent tank 9, and if necessary, the stopper 10 and the spray nozzle are provided. 7, a valve 14 for adjusting the discharge amount of the solvent and an operating piece 11 of the stopper 10 are provided on the surface of the grip portion 1.

The solvent supplied from the solvent tank 9 through the solvent hose 8 is pressure-accumulated by a pressure accumulating manual pump or an electric pump, and the stopper 10 is opened, so that the solvent flows out to the spray nozzle 7 at once. In order to open the stopper 10, the upper end of the stopper 10 is pressed to release the collapse of the solvent hose 8. The upper end of the stopper 10 can be directly pressed by hand, or if necessary, the operating piece 11 can be attached to the surface of the grip 1. When the stopper is provided, the operating piece 11 is manually pushed to open the stopper 10. By releasing the collapse of the solvent hose 8, the solvent is ejected and sprayed from the ejection port of the spray nozzle 7, and the solvent is evenly applied to the overlapping surface of the upper and lower waterproof sheets a and b.

The opening member 6 provided at the tip of the support 5 is provided so as to have a predetermined space between the upper and lower waterproof sheets a and b, and is sprayed by the gap opened by the opening member 6. The solvent can be uniformly sprayed from the tip of the nozzle 7 to the upper and lower surfaces of the waterproof sheets a and b. The shape of the opening member 6 is not particularly limited, but the opening member 6 is formed to have a thin tip and a thicker pressure roll side, for example, a substantially triangular cross section. However, the shape of the opening material is not limited to the substantially triangular shape in cross section, and may be any shape such as an arc shape or a polygonal shape as long as the tip is thin and the roll side has a height enough to lift the waterproof sheet. Alternatively, the flat plate may be provided in an inclined shape.

In addition, the opening member 6 may be provided with a guide 12 for linearly moving the welding machine along the end of the waterproof sheet a or b. When this guide 12 is provided, it is provided at the tip of the opening member on the side opposite to the support 5, or when it is provided on the side of the support 5 and the side opposite to the support 5, the tip of the opening member 6 is set downward. When a protrusion is provided so as to be bent to abut on the tip of the lower sheet b, and when it is provided on the support side, a protrusion is provided according to the overlapping width of the waterproof sheet to abut the tip of the upper sheet a. To Alternatively, the center of the support 5 may be bent inward in parallel. The portion projecting to the inside of the support 5 at the time of construction is applied to the end portion of the waterproof sheet to perform welding construction.

The material of the opening member is not particularly limited, but it is preferable that the opening member has a certain degree of hardness, such as metal such as iron and aluminum, wood or hard plastic, and the width is a waterproof sheet. The width which is narrower than the overlapping width of a or b or more than the overlapping width is good, and the overlapping width of the waterproof sheet is 30 to 100 mm, so that the width of 20 to 200 mm is preferable. The height (thickness) required to lift the upper waterproof sheet a is 10-50 mm, which is a height at which the spray nozzle 7 does not come into contact with the waterproof sheets a and b or a height at which the spray nozzle 7 is not overloaded. It is preferably about the same. The width in the vertical direction depends on the width and height, but is preferably 10 to 100 mm.

The spray nozzle 7 is made of plastic such as metal such as iron or aluminum, and may have any shape as long as it has a structure for spraying a solvent from a discharge port. It is also possible to spray in multiple directions, to form a modified structure to spray in multiple directions, or to form two or more holes to spray in multiple directions. This hole (discharge port) can be opened at the tip or side surface of the nozzle or at an arbitrary position, but the solvent is discharged and sprayed in multiple directions to the overlapping surface of the upper and lower waterproof sheets a and b. Provide so that the solvent can be applied uniformly. Further, in order to more finely adjust the coating amount of the solvent, it is possible to perform welding by providing a filter such as a solvent resistant cloth around or inside the nozzle.

It is preferable that the spray nozzle 7 is fixed toward the support 5 toward the center of the pressing roll 3 so that the solvent is sprayed over the entire overlapping width of the waterproof sheet at the time of construction. In order to fix the spray nozzle 7 to the support 5, a short tube 13 made of metal or hard plastic is connected between the spray nozzle 7 and the solvent hose 8 and the short tube 13 is fixed to the support 5. The spray nozzle 7 is fixed to the short tube 13. In order to fix the short tube 13 to the support 5, it is preferable to fix the spray nozzle 7 movably so that the position of the spray nozzle 7 can be shifted in the front-rear direction and the width direction, and the fixed position is the opening member 6 and the pressing roll. It is provided between the first and second electrodes, and preferably at a substantially intermediate position.

The spray nozzle 7 is fixed to the short pipe 13 and sprays the solvent from its discharge port in multiple directions so as to adhere to the overlapping surface of the upper and lower waterproof sheets. Alternatively, it is fixed in a slightly tilted state, for example, in a state in which it is tilted downward or in the roll side direction or in both directions, or in a swingable state. Further, the number of the spray nozzles 7 is not necessarily one, and two spray nozzles 7 may be provided as shown by phantom lines in FIG.

The size of the spray nozzle 7 is smaller than the overlapping width of the waterproof sheet, and may have any shape such as a polygon, a cylinder, or a hemisphere having a maximum side length of about 5 to 30 mm, for example, a cylinder. In this case, the solvent discharge port is provided on one side of the bottom surface having a diameter of 5 to 30 mm. The size of the hole of the solvent discharge port of the spray nozzle 7 is not particularly limited, but it is preferable that the solvent is sprayed in a mist state, and a size of about 0.1 to 2 mm is suitable. Regardless of the shape, the appropriate amount of solvent is sprayed from the solvent outlet, and the solvent is applied to the upper and lower waterproof sheets. It is preferable that the nozzle is rotatably attached so that the angle of the nozzle can be adjusted appropriately at the time of use.

The solvent hose 8 for feeding the solvent to the spray nozzle 7 is required to be a material insoluble in the solvent. For example, a material having excellent solvent resistance such as a silicone rubber hose is preferable. On the other hand, insoluble rubber or soft plastic such as olefin resin such as polyethylene may be used. The end of the solvent hose 8 is connected to the spray nozzle 7, and the inside of the grip 1 is passed through the stopper 10 inside the grip 1 as it is, or the solvent hose 8 is passed through the stopper 10 and then exposed outside the grip 1. The solvent tank 9 different from the welding machine of FIG.

Further, in order to adjust the amount of the solvent more accurately, a discharge amount adjusting valve is provided in the solvent hose 8 such as a silicone rubber hose between the spray nozzle 7 and the stopper 10 or between the solvent hose 8 and the short pipe 13. It is also possible to provide 14. By attaching the discharge amount adjusting valve 14, it is possible to finely adjust the discharge amount of the solvent, and to prevent the dripping of the solvent accumulated between the stopper 10 and the nozzle 7 at the end of the operation. The shape and material of the valve 14 are not particularly limited, but in addition to solvent-resistant plastic, it is preferably made of metal such as iron or stainless steel, and has a structure provided with an on-off valve that can finely adjust the solvent discharge. preferable.

The pressing roll 3 may be made of metal such as iron or rubber such as silicone rubber, and its width needs to be equal to or larger than the width of the overlapping portion of the waterproof sheet, and is about 30 to 200 mm, preferably 40 to 100 mm. Things are good. The roll 3 preferably has a diameter of 10 to 100 mm and is rotatably connected to the grip 1 via a frame 2 made of metal or hard plastic.

The frame 2 is provided at the tip of the grip portion 1 and the pressing roll 3 is provided via the frame 2. The frame 2 may be connected to either the left or right of the roll shaft 4, or both the left and right of the roll shaft 4. You may connect. With either connection, the frame 2 is mounted so that it can move freely. The frame 2 is fixed to the grip portion 1, and the solvent hose 8 is passed through the inside of the grip portion 1 or the outside of the grip portion from a stopper.

The shape and material of the grip portion 1 are not particularly limited, and may be any shape such as cylindrical shape, hexagonal cross section, or polygonal shape. If the material is hard, it may be metal or hard plastic. The inside of the grip portion 1 may be formed into a hollow pipe shape to allow the solvent hose 8 to pass therethrough, or the solvent hose 8 may pass through the inside of the grip portion between the stoppers 10 of the grip portion 1 and be discharged to the outside from there. In addition, unevenness may be provided on the surface so that it may be easily gripped, or rubber or soft plastic may be provided on the surface.

The grip portion 1 is provided with a stopper 10 for controlling the outflow of the solvent by crushing or opening the internal solvent hose 8. The stopper 10 may have any configuration. For example, by using a pressure crushing type with a spring as shown in the figure, the solvent hose 8 is brought into contact with the fixed water stop shaft 15 and the bottom of the stopper 10 is pushed up by the spring 16 to lift the solvent hose 8 into the water stop shaft 15. Compress the spring 16 on the bottom surface of the stopper 10 by pressing the upper end of the stopper 10 or the operating piece 11 if the stopper 11 is provided by pressing the upper end of the stopper 10 to stop the solvent from flowing out. The solvent hose 8 is released from the collapse and the inside of the hose is opened to allow the solvent to flow, and the stopper 10 is pressed to adjust the flow rate. However, this is not limited to this pressing collapse method. Instead, the solvent can be stopped, discharged and regulated by any other configuration.

The diameter of the grip portion 1 is large enough to be easily gripped by a hand, and preferably has a diameter of 20 to 80 mm, particularly 30 to 60 mm. Further, if the grip portion is too short or too long, it is difficult to use. It is preferably 50 to 300 mm, particularly 100 to 200 mm.

The solvent tank 9 has a capacity of about 300 milliliters to 10 liters, preferably 500 milliliters to 3 liters. The solvent tank 9 is provided with a shoulder belt, a winding belt, etc. Work on the body such as shoulders, back or waist. A pump is attached to the solvent tank 9, and the solvent hose 8 is connected to apply pressure in a pressure accumulating manner. The pump may be an electric pump, a manual pump, a horticultural manual spray pump, or any type of pressure pump. For example, with a manual pump as shown in the figure, solvent is put in the tank and the plunger is moved up and down to increase the pressure in the tank and accumulate the pressure, and the solvent is sent to the stopper 10 inside the solvent hose 8 and the stopper 10 is opened. By opening, the accumulated solvent flows out all at once and is supplied to the spray nozzle 7.

The waterproof sheet welding machine according to the present invention has the above-described configuration as a basic configuration, and can be variously modified or attached in order to perform welding work more efficiently. For example, one or more additional pressing rolls 3 may be connected to the support 5 to further flatten the sheet of the overlapping portion behind the pressing roll 3 for applying a solvent and press-bonding. is there. Further, a rotary brush 17 such as metal bristles or plastic bristles is provided between the opening member 6 and the spray nozzle 7 so as to be connected to the support body 5, so that a small number of scratches are formed on the joint surface of the waterproof sheets a and b. It is also possible to strengthen the adhesion of the attachment sheet. The brush 17 may be rotated at the same time as the rotation of the pressing roll 3, or may be provided with a gear to rotate at high speed, or may be independently rotated by a motor.

Further, a small roll 18 may be installed in front of the opening member 6 to prevent the waterproof sheets a and b from being exposed. The small roll 18 may be connected to the support 5 or directly to the roll shaft 4.

In addition, since the waterproof sheets a and b are difficult to adhere to each other in winter when the outside temperature is low, the heater is provided in front of the opening member 6 or the opening member 6 in order to softly loosen the waterproof sheets a and b and spread the solvent. 6 may be provided and hot air of about 50 to 80 ° C. may be blown out. In that case, the heater may be an electric heater connected to a battery or a battery, or a heater using a heat source such as solid fuel or gas.

Next, a specific example of the waterproof sheet welding machine of the present invention and a specific construction example using the same will be described. An opening member having a cross section of a substantially triangular shape and having a horizontal width of 70 mm, a height of 20 mm and a vertical width of 30 mm is connected to the roll shaft of the pressing roll via a support. The pressure roll is made of iron with a diameter of 50 mm and a width of 60 mm, which is surface-plated. The roll shaft on the right side of the roll has a washer rotatably attached to the frame connected to the pipe-shaped grip and the support. It is fixed with a nut through. This frame is made of iron and is bent into an L shape, and the pressing roll and the grip are connected and connected.

A short pipe made of hard plastic is fixed to a substantially central portion of a support body that connects the opening member and the pressing roll, and a spray nozzle made of metal is provided with one hole in one side of the plastic pipe. Is fixed so as to be located between the opening member and the pressing roll and to be located substantially at the center in the widthwise direction of the overlapping portion of the waterproof sheet during processing, and a silicone rubber hose is connected to the other side of the plastic pipe. This rubber hose passes through the side of the support and the frame, is connected to the tip side of the pipe-shaped grip, penetrates the hollow inside of the grip, and is connected to the solvent tank. The silicone rubber hose extends from the grip portion by 1 to 2 m and is connected to a solvent tank. The solvent tank is provided with a shoulder belt so that it can be used over the shoulder.

The grip portion is made of hollow hard plastic and the surface is covered with a rubber sheet. A silicone rubber solvent hose is passed through the grip portion, and the solvent hose is crushed in the middle. A stopper is provided to stop the water. The stopper is opened and closed by pushing the upper end, and the supply of solvent can be adjusted. By pressing this stopper, the above pressure-accumulated solvent flows out of the solvent tank and is supplied to the spray nozzle all at once, and the solvent is sprayed from the tip of the spray nozzle.

The waterproof sheets are joined by the above-described waterproof sheet welding machine as follows. A polyvinyl chloride waterproof sheet having a thickness of 2 mm, a width of 1800 mm and a length of 20 m was temporarily placed on the rooftop so that the sheets overlap with each other at 40 mm. Put a small amount of methyl ethyl ketone (MEK) in tetrahydrofuran (THF) into a solvent tank and pressurize with a pump to accumulate pressure. Insert the opening member of the waterproof sheet welding machine and the spray nozzle between the overlapping portions of the waterproof sheet, align the guides with the end portions of the waterproof sheet, and set the spray nozzle so that it is approximately in the center of the overlapping width.

Next, the pipe-shaped grip portion is used as a handle and the stopper is pushed to spray the solvent and push the pressing roll forward to apply the solvent to the upper and lower surfaces of the waterproof sheet and to bond the sheets together with the pressing roll. When the adhesive on the tarpaulin is completed, release the stopper to stop spraying the solvent. If the pressure buildup is insufficient, use the pump to build up the pressure again and repeat the above procedure to bond the waterproof sheet.

In the present invention, the waterproof sheet has been described by taking a vinyl chloride resin sheet as an example. However, the sheet is not limited to vinyl chloride resin, but a sheet made of other thermoplastic resin such as chlorinated polyethylene, chlorosulfonated polyethylene, or a synthetic resin. A rubber sheet may be used, and the solvent for dissolving the resin of the waterproof sheet may be arbitrarily selected for solvent welding. The waterproof sheet has a thickness of about 1.0 to 3.0 mm, and preferably has a so-called sheet shape in which a backing material such as a base cloth is not lined on the back surface of the sheet. The size of the waterproof sheet is not particularly limited, and is not limited to a long sheet, but a small vinyl chloride resin sheet such as a sheet for reinforcement or a disc board holding sheet used for the floating tension method. It can also be used when welding.

Further, the waterproof sheet welding machine of the present invention has a grip portion, and is constructed by pushing the roll forward, that is, in the direction of the opening member with the roll shaft of the pressing roll as a fulcrum, or by constructing it backward, that is, while pulling the roll. It is optional.

[0033]

[Effect of device]

 The waterproof sheet welding machine of the present invention solves the problems that were conventionally done by hand, and even a skilled craftsman can cleanly and easily bond a waterproof sheet by solvent welding. Was simplified. In addition, by applying and spraying the solvent with a spray nozzle, the solvent can be applied evenly on both the upper and lower sides of the waterproof sheet, increasing the adhesive strength. It was possible to prevent the swelling of the sheet due to, and it was possible to solve the problem that the adhesive portion peeled off over time.

Further, in the waterproof sheet welding machine of the present invention, the solvent tank and the welding machine are separated, so that the welding machine part is compact and can be easily held with one hand, even for a craftsman who is accustomed to manual work. Construction can be done without any discomfort. In addition, the solvent tank can be hung on the shoulder or wrapped around the waist for workability, improving workability.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a waterproof sheet welding machine of the present invention.

FIG. 2 is an enlarged plan view of a main part.

FIG. 3 is a perspective view of a usage state

FIG. 4 is a sectional view of the stopper.

FIG. 5 is a sectional view of the stopper in an operating state.

FIG. 6 is a side view of another usage state.

FIG. 7 is a perspective view of another embodiment.

[Explanation of symbols]

1: grip part, 2: frame, 3: roll, 4: roll shaft, 5: support, 6: opening member, 7: spray nozzle,
8: solvent hose, 9: solvent tank, 10: stopper,
12: guide, 14: discharge amount adjusting valve.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshiya Takada 190 Takinocho, Takino-cho, Takino-shi, Hyogo Far East Industrial Machinery Co., Ltd.

Claims (5)

[Scope of utility model registration request] 1. A pressing roll is provided at the tip of the grip through a frame, and a support is projected on a roll shaft of the roll,
An opening member is provided at the tip of the support substantially parallel to the pressing roll, and a spray nozzle is provided between the roll and the opening member. The tip of the solvent hose is connected to the nozzle and the other end is connected to the solvent tank. And a waterproof sheet welding machine provided with a stopper for controlling the discharge of the solvent by crushing and opening the hose at the grip portion. 2. The waterproof sheet welding machine according to claim 1, wherein a solvent hose penetrates through the grip and is connected to the solvent tank. 3. The waterproof sheet welding machine according to claim 1, wherein the spray nozzle is provided with one or a plurality of holes. 4. The waterproof sheet welding machine according to claim 1, wherein the opening member is provided with a guide that abuts against a side edge of the overlapping width of the waterproof sheet. 5. The waterproof sheet welding machine according to claim 1, further comprising a plurality of pressing rolls.