JPH0512027Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application This invention is a method for joining soft synthetic resin waterproof sheets, which are laid on flat roofs of buildings, water tanks, etc., to each other at overlapping joints when they are laid. This invention relates to a waterproof sheet joining device.

PRIOR TECHNOLOGY The construction of the above-mentioned waterproof sheets is carried out by stacking long unit waterproof sheets manufactured to a predetermined width and joining them together at their side edges, or by separately attaching them to each other. By stacking and joining band-shaped joining waterproof sheets made of the same material onto the butt joints of adjacent unit waterproof sheets, a continuous waterproof layer is formed over a wide area.

There are two methods for joining such tarpaulin sheets: one is to weld the sheets together using a solvent-based adhesive, and the other is to use thermal fusion, which involves melting a portion of the tarpaulin sheet itself using heating means and joining the sheets together. It has been adopted.

No matter which joining method is used,
When installing a waterproof sheet over a large area,
When such joining is performed manually, not only does it take a great deal of time and effort, but even with a high degree of skill, there are likely to be defective joints due to incomplete welding and fusion. For this reason, various bonding devices have recently been proposed for automatically or semi-automatically performing the bonding work.

An example of such a conventional proposal is
Publication No. 421, JP-A-61-152432, JP-A-51
−2775 Publication, Special Publication No. 1977-6730, Publication No. 1977
-There is something like the one described in Publication No. 38606.

Problems that the invention aims to solve However, in the case of these conventional proposals, the equipment is quite large and expensive, lacks lightness, and is unsuitable for constructing tarpaulins in relatively small areas. However, in the case of relatively light products such as the one shown in Japanese Utility Model Publication No. 47-38606, it is not only difficult to operate and work, but also does not necessarily provide a stable and reliable sealing condition. There were some difficulties, such as difficulty in achieving the bonding of the two.

In contrast to the joining devices that have the various problems mentioned above, this invention is as simple as possible, more convenient to use, can be manufactured and provided at low cost, and is free from the risk of troubles such as breakdowns. The purpose of the present invention is to provide a truly practical waterproof sheet joining device using a solvent-based adhesive application method that satisfies the various requirements of being able to reliably join waterproof sheets. shall be.

Means for Solving the Problems For this purpose, the present invention uses a manual push-type trolley to supply adhesive to the application nozzle.
This is done by using the siphon principle, eliminating the need for forced feeding means such as pumps, and ensuring a reliable bond by immediately pressing the joint of the waterproof sheet by pushing the cart after applying the adhesive. The main feature is that it is made as follows.

That is, this invention is based on a manual pushing cart equipped with a pushing handle on the upper surface and at least one pressure roll on the lower surface, and a method for joining waterproof sheets that are installed under the front of the cart and are to be joined to each other. an adhesive application nozzle that is inserted between the parts, and an adhesive tank that is made of a crushable and deformable soft resin container that is removably held in a tank holder on the trolley and has a releasable sealing cap at the upper end opening. , an upper end of a suction pipe that passes through the cap of the tank and whose lower end reaches the inner bottom of the tank is connected to a feeding tube that is connected in communication with the coating nozzle, and is interposed in the adhesive feeding path by the tube, and It has a valve that can open and close the channel and adjust the degree of opening, and the adhesive can be automatically fed from the tank to the application nozzle using the siphon principle based on the phase difference between the heights and lows. The gist of the present invention is to provide a simple joining device for waterproof sheets, which is characterized by the following.

Function When joining the waterproof sheets, first, open the valve slightly in advance and crush the circumference of the container of the adhesive tank, thereby feeding the required amount of adhesive into the supply tube. Close the valve once. Then, with the trolley set in place, loosen the cap of the adhesive tank to allow replacement air to flow in freely, open the valve to the specified opening, and move the trolley along the joint of the waterproof sheet at a specified speed. push forward As a result, the adhesive that is continuously discharged from the nozzle according to the siphon principle is applied between the joints of the waterproof sheets, and then immediately pressed with the required pressure by the pressing roller, thereby achieving the desired joining.

Embodiment Hereinafter, one preferred embodiment of this invention will be described with reference to the accompanying drawings.

In the illustrated embodiment, 1 is a waterproof sheet S1, S
2, and the wheels provided on the lower surface of the cart are press rolls 2, 3, which all function as joint pressing means.
4 and 5. That is, the trolley 1 has a pair of angle members 1a arranged in parallel on the left and right,
1a and a pair of front and rear connecting plates 1b connecting them,
1b with a width of about 10 to 20 cm and a length of about 15 to 25 cm. Four heavy press rolls 2, 3, 4, and 5 are hung horizontally between the left and right vertical side walls made of angle material. They are installed in parallel. These four wheels and presser rolls are
Two of them, as shown in Figures 1 and 3,
That is, regarding the two rolls 3, 5, the second and fourth from the front end, their roll axes 3a, 5a
is pivotally supported in an immovable state on the side wall of the trolley 1, while
The remaining two rolls 2 and 4 are supported in a vertically movable manner by fitting their roll shafts 2a and 4a into vertically elongated holes 19 and 19 bored in the side wall of the truck 1. Even if there is an uneven surface on the bogie running surface, all rolls 2,
3, 4, and 5 are to be rolled while reliably maintaining contact with the surfaces of the waterproof sheets S1 and S2.

The trolley 1 is manually driven and has a manual pushing handle 6 on its upper surface, which can be grasped by hand and pushed in the direction of the arrow in FIG.

Further, one adhesive application nozzle 8 is installed horizontally at one side edge of the lower front portion of the truck 1. This nozzle 8 has waterproof sheets S1 and S2.
It runs by being inserted between the overlapping joining edges of , and in the illustrated embodiment it is shown as a single-hole type thin beak-shaped type, but a multi-hole type type can also be used, or A brush type etc. may also be used.

The nozzle 8 is attached to a mounting plate 9 in the shape of a strip extending in the left-right direction, which is attached to the front end of one side edge of the truck 1 in a projecting manner.
, hang bolt 7 and inverted L-shaped nozzle holding piece 1
0 so that the mounting position can be adjusted in the horizontal and vertical directions. That is, the hanging bolt 7 fixed to the nozzle holding piece 10 is slidably fitted into the long hole 11 bored in the mounting plate 9, and the bolt is tightened from above and below with the nut 12. By loosening the nut 12 and changing the mounting position of the nozzle holding piece 10 along the elongated hole 11, the set position of the nozzle 8 can be moved left and right, and the bolt 7 can be moved up and down. By moving, the height position of the nozzle 8 can be adjusted.

Furthermore, an annular tank holder 13 is attached to the truck 1 on the front protrusion 1c on the other side edge opposite to the side where the nozzle 8 is attached. An adhesive tank 14 containing an adhesive is removably mounted in the retainer 13 by fitting its lower end into the retainer 13.

The adhesive tank 14 is a cylindrical container 14 made of a soft synthetic resin such as polyethylene resin, so that the circumference of the tank can be crushed and deformed with a fingertip.
a, and a removable screw-type closing cap 15 is attached to the upper opening.
Moreover, a suction pipe 16 is attached to the cap 15, which passes through the center thereof and has a lower end that reaches the inner bottom of the container 14a.

The upper end of the suction pipe 16 and the nozzle 8 are connected to each other via an adhesive feeding tube 17 made of transparent synthetic resin. The feeding tube 17 has an intermediate portion guided onto the pushing handle 6, and a valve 18 with an operating lever 18a provided on the handle is interposed in the intermediate portion to open and close the adhesive flow path through the tube. Moreover, the opening degree can be adjusted.

In addition, as the waterproof sheets S1 and S2, a soft polyvinyl chloride sheet with a thickness of about 1.0 to 2.0 mm is most commonly used, but other materials such as polyethylene,
In addition to soft synthetic resin sheets such as polypropylene,
Non-vulcanized rubber sheets, rubber asphalt sheets, etc. may also be used. In addition, the adhesive used for these connections is selected depending on the material of the waterproof sheet, but in the case of a vinyl chloride waterproof sheet, for example, tetrahydrofuran, or a small amount of vinyl chloride resin dissolved in it, is used. It is preferred and common to use solvent-based adhesives such as those described above. Depending on the type of waterproof sheet, various solvent-based adhesives, epoxy-based, urethane-based, rubber-based adhesives, etc. may also be used.

Next, the joining operation of waterproof sheets by the joining apparatus shown in the above embodiment and the operation thereof will be explained as follows.

The joining device of the embodiment is mainly used for joining the first and second waterproof sheets S1 and S2 by overlapping their edges with each other, as shown in FIG. Before joining, the cap 15 of the adhesive tank 14 is closed and the circumference of the container 14a is pressed inward by hand. At this time, the adhesive in the tank is introduced into the feed tube 17 in a predetermined amount by setting the valve 18 to a required opening degree. Then, loosen cap 15 slightly and
Once replacement air can be introduced into the chamber 4, the valve 18 is closed, and preparation for the joining operation is completed.

After completing this preparation, place the trolley 1 in a predetermined position,
As shown in FIG. 1, the nozzle 8 is covered with a waterproof sheet S1,
It is placed in an inserted state between the joints of S2. Then, the valve 18 is opened to a predetermined opening degree. Then, the adhesive in the tank 14 flows down inside the tube 17 in the direction of the nozzle 8 according to the siphon principle based on the height phase difference between the set positions of the tank 14 and the nozzle 8, and is continuously discharged from the nozzle 8. It is dispensed in small amounts. After confirming this discharge, the cart 1 is manually pushed along the joint edge of the waterproof sheet at a speed corresponding to the amount of adhesive discharged. Then, the adhesive discharged from the nozzle 8
As a result of the passage of the bonded edges, the two bonded edges are overlapped again, and the bonded edges are spread between the two bonded edges, and then pressed down from above multiple times in a stepwise manner with presser rolls 2, 3, 4, and 5. By this, both joining edges are tightly joined in a reliable sealing state. In this way, by running the trolley 1, the waterproof sheet S
1 and S2 are performed continuously.

Needless to say, when the bonding operation is interrupted, the valve 18 is closed to stop discharging the adhesive from the nozzle 8.

In the illustrated embodiment, the trolley 1 is equipped with four presser rolls, but it is sufficient that at least one presser roll is installed.
It may be configured as a Catapillar (registered trademark) type. In that case, one or more running wheels may be separately provided to ensure stable running performance of the trolley 1, if necessary.

Effects of the invention As mentioned above, the waterproof sheet joining device according to the invention is manually operated by attaching a pushing handle to the trolley, thereby eliminating the need for a drive device for running the trolley, and In addition, the adhesive can be automatically fed from the adhesive tank to the application nozzle using the siphon principle based on the phase difference between the heights of the set positions. No similar equipment is required. Therefore, it has an extremely simple structure, and can be manufactured as a sufficiently small, lightweight, and inexpensive product that can be carried with one hand, and is lightweight enough to be easily used, and is free from malfunctions. It can be made highly durable and less likely to cause trouble.

In addition, as described above, by pushing the cart while discharging adhesive from the nozzle, the pressure rollers equipped on the cart immediately press the joint edge of the waterproof sheet coated with adhesive from above.
In addition to achieving reliable bonding, interruptions in the process of bonding can be easily and freely performed by closing the valve and stopping the supply of adhesive, and the process can be resumed without any problems. The process can be easily carried out, and it can be put to practical use as a convenient joining device with excellent operability and workability.

[Brief explanation of drawings]

The drawings show an embodiment of the invention, in which Fig. 1 is a perspective view in use, Fig. 2 is a plan view, Fig. 3 is a partially cutaway side view, and Fig. 4 is a perspective view showing the device in use.
The figure is also a front view. S1, S2... Waterproof sheet, 1... Trolley, 2,
3, 4, 5...Press roll, 6...Pushing handle, 8...Applying nozzle, 13...Tank holder,
14...adhesive tank, 14a...container, 15...
...cap, 16...suction pipe, 17...feeding tube, 18...valve.

Claims (1)

[Claims for Utility Model Registration] A pushing handle on the top surface and at least one push handle on the bottom surface.
a manual push truck equipped with two or more pressure rolls; an adhesive application nozzle installed at the lower front of the truck and inserted between joints of waterproof sheets to be joined to each other; and a tank holder on the truck. an adhesive tank consisting of a crushable and deformable soft resin container which is detachably held in the container and has a releasable sealing cap at the upper end opening; A feeding tube having an upper end of the upper tube connected in communication with the coating nozzle, and a valve interposed in the adhesive feeding path by the tube to enable opening/closing of the flow path and adjustment of the degree of opening. . A simple waterproof sheet joining device, characterized in that the adhesive can be automatically fed from the tank to the application nozzle using the siphon principle based on the phase difference between their heights.