JPH01315511A - Joining part structure of waterproof sheet - Google Patents

Abstract

PURPOSE:To enable watertight sheet joining to be easily and securely obtained by providing engaging recessed parts and projected parts to respective end parts of waterproof sheets so that respective sheets can be joined to each other by engaging the recessed parts with the projected parts, and further by interposing an adhesive waterproof material in the joining part. CONSTITUTION:In the respective end parts of waterproof sheets 1, 2 to be joined to each other, an engaging part 3 having two rows of engaging recessed parts 5, 5 and an engaging part 4 having two rows of engaging projected parts 6, 6 are provided respectively. And between the engaging projected parts 6, 6 an adhesive waterproof belt 7 is attachedly provided, and the sheets 1, 2 are joined by engaging the engaging recessed parts 5, 5 with the engaging projected parts 6, 6. In this case, a secure joining and high watertightness can be obtained by the waterproof belt 7.

Description

[Detailed description of the invention] Ri Moxibustion Goryox ■ Ko 1 The present invention applies to tunnels, seawalls (rivers, coasts, etc.).

Regarding waterproof sheets used in levees, reservoirs, regulating ponds, submerged cocoon facilities, waste disposal sites, buildings, etc.
In particular, it relates to the structure of the joints of such waterproof sheets.

The above-mentioned waterproof sheet is used by joining relatively small +1J sheets manufactured at a factory into a large sheet having the required area on site.

Conventionally, the most common method for joining sheets has been to use adhesives or adhesives. However, the adhesive method
It cannot be constructed underwater or in locations where water exists, and is subject to weather changes. However, when the temperature is high, only the surface layer of the adhesive dries and forms cracks, and when the temperature is low, the continuous failure of the solvent decreases, requiring a long oven time, and in any case, the adhesive strength decreases and varies. What about the work process? ! 2M varies depending on the person, and sufficient pressure bonding cannot be performed on an uneven substrate.

The fusion method requires special techniques for construction because it uses heat, and requires careful pipe burying. moreover,
Expensive titling machines are required. Construction techniques vary depending on the thickness of the sheet. *@There is a limit to the speed of the hoeing machine, resulting in poor workability. There are problems such as the need for on-site power supply equipment.

As a method other than adhesion and fusion, a method as shown in FIG. 5 is also used. In this method, a male engagement piece 02 and a female engagement piece 03 are attached to the edges of the sheets 01.01 to be joined to each other, and these engagement pieces 02.03 are Seat H by engaging
,01 joins. However, as shown in Figure (a), when a tensile action is occurring on the sheet 01.01 due to pressure etc., both engaging pieces engage tightly and a complete water stop is obtained, but as shown in Figure (b). When no tensile action is occurring, the engagement between the two engaging pieces becomes loose, reducing the water-stopping properties and causing water leakage.

Further, Japanese Utility Model Publication No. 63-2501 proposes a joint structure in which waterproof shift doors are connected by a fastener attached to the edge of the sheet, and the entire length of the joint is covered with a cover material. However, this joint structure ensures watertightness with the cover material, and the cover material is fixed to the connecting part by adhesion or fusion, so it has the same problem as the adhesive method or fusion method described above. It has points.

Therefore, the present invention aims to provide a joint structure that allows sheet joining with high water-stopping properties to be performed more easily and reliably than in the above-mentioned prior art.

-1.No-r- For this reason, the waterproof sheet joint structure according to the present invention is such that a belt-shaped engaging portion is provided along the edge of each waterproof sheet to be joined to each other. , one of the engaging parts is provided with an engaging protrusion and the other engaging part is provided with an engaging recess along the edge, and the engaging protrusion and the engaging recess are engaged. An adhesive water stop material is interposed adjacent to the engagement protrusion and recess in the engagement section which is fitted together.

According to the present invention, when the engaging convex portion and the engaging recess provided in the engaging portion of each waterproof sheet to be joined are engaged, the water stop material is simultaneously applied to the surface of the opposing engaging portion. Closely adheres to the surface to provide reliable water-stopping action. However, the lever joining process does not require sophisticated adhesive or fusion technology, and this joint structure provides a complete water-stopping effect even when no tensile force is applied to the waterproof sheet and the sheet is sagging. Furthermore, this joint structure can be constructed using simple and inexpensive construction equipment.
It can be obtained extremely easily and efficiently even in water or in places where water is present, or in places where workability is poor.

Support-Lid-1 Fig. 1 is a cross-sectional view showing each edge of the waterproof sheets 1.2 to be joined together. Engagement parts 3 and 4 are provided at the edges of the waterproof sheets 1 and 2, respectively, extending along the edges. These engaging parts 3 and 4 are respectively connected to the waterproof sheet 1.
．． 2 may be integrally formed as a part of the waterproof sheets 1, 2, or separate strips may be formed watertightly connected to each waterproof sheet 1, 2. An engagement recess 5 is provided on the surface of the engagement portion 3 that faces the engagement portion 4 , and an engagement recess 5 that can engage with the engagement recess 5 is provided on the surface of the engagement portion 4 that faces the engagement portion 3 . A mating convex portion 6 is provided. These engaging concave portions 5 and engaging convex portions 6 may be arranged in multiple dotted lines along the edge of the waterproof sheet 1.2, or may be arranged in a line shape continuously extending along the edge. They may be formed as two or more rows, and are preferably arranged in two or more rows as shown.

In the illustrated embodiment, the engaging concave portions 5 and the engaging convex portions 6 are arranged in two rows, and these engaging convex portions are arranged in two rows of the engaging convex portions 6 and 6 provided on the retaining portion 4. An adhesive tourniquet 7 is attached along the section.

Examples of the material for the tourniquet 7 include the following.

(1) Rosin, ester gum, polyterpene resin.

A rubber material that uses styrene resin as a tackifier.

(2) Polyolefin materials using polyterpene resins, Cs-based petroleum resins, etc. as tackifiers.

(3) Liquid curable material using liquid polybutadiene, liquid isoprene rubber, etc. as a tackifier.

(4) Mizuna l whose base is a silane compound that has a group that can be connected to a polymer and a group that can be condensed with silanol! mold material.

Specifically, there are vinyltrieth4disilane, vinyll-liftoxysilane, and the like. As a filler, it reacts with oxides such as benzoyl peroxide, dichlorobenzoyl peroxide, etc. to form water bridges.

(5) Thermoplastic resin (PE, EVA, etc.) materials that use polyterpene resin, EVA, etc. as tackifiers, or rubber-based (NR) materials that use rosin, polyterpene resins, etc. as tackifiers.
, polysulfide rubber, etc.).

(6) Moisture-curing material based on acrylic acid octopus methacrylic acid copolymer or the like.

(7) A blend of a water-swellable material using a blend material such as a rubber material, a thermoplastic elastomer, a thermoplastic resin, or EPDM. Specifically, cross-linked polyacrylate-based materials (product name Arasorb, etc.), isobutylene/maleate-based materials (product name Kl Gel), starch/polyacrylate-based materials (product name Sunwet), PV △/Polyacrylate material (product name Sumikagel) or cross-linked PVA material (product name Aquareserve GP)? ? A material based on

The waterproof sheets 1 and 2 are made of materials such as vulcanized rubber, EPDM, thermoplastic elastomer, and thermoplastic resin.

The above-mentioned waterproof sheet 1 and waterproof sheet 2 can be joined very efficiently and easily as shown in FIG. In Figure 2, 8.8 is a pressure roller of 1λj, 9
is a guide plate, and the engaging part 3 between the tarpaulin sheet 1 and the tarpaulin sheet 2 is
. At this time, a water band 7 is attached between the engaging convex portions 6.6 of the engaging portion 4, and the engaging portions 3, 4 and the water band 7 are integrally fed between the pressure rollers 8, 8. Then, it is pressed from both sides by pressure rollers 8, 8, and the engaging protrusion 6 and the engaging recess 5 engage with each other, and the water stopper 7 is sticky on the inner surface of the engaging part 3.4 due to its adhesiveness. , as shown in FIG.
They are sent out from the pressure 40-ra 8 in a state of being joined to each other via the pressure 40-ra 8.

The waterproof sheets 1.2 are each fed into the pressure roller 8 while being supported in the oven by guide rollers 10.11.

The tourniquet 7 is a roll 13 wound around a core 12,
It is fed out from the roll 13 toward the pressure roller 8 while being guided by a guide roller 14 .

In this way, the waterproof sheets 1 and 2 can be joined extremely easily and efficiently using a simple and inexpensive device, and this joining operation does not require skilled gluing or fusing techniques. It can be easily carried out underwater, in places with humidity, spring water, etc., or in places with poor workability.

This joint structure provides reliable jointing and high water-stopping properties due to the engagement between the engaging concave portion 5 and the engaging convex portion 6 and the adhesive water stop band 7 interposed between the engaging portions 3 and 4. However, if the engaging part 3 on one side, for example, is made in a light color tone, and the engaging part 4 and stopband 7 on the other side are made in a dark color tone, the engaging part 3 can be moved to the outside after joining. If the baby is a baby, the contact area between the engagement recess 5 and the engagement protrusion 6 and the contact area between the engagement part 3 and the tourniquet 7 will have a different color tone from other parts, so that reliable joining will not be possible. You can easily check from the outside whether it has been used or not.

FIG. 4 shows another embodiment in which the present invention is applied to a sheet joint similar to that shown in FIG. 5. Also in this sheet joining part, engagement parts 3 and 4 are provided at the edges of the waterproof sheets 1 and 2, respectively, extending along the edges, and an engagement recess 5 is provided in the engagement part 3. Further, the engaging portion 4 is provided with an engaging convex portion 6 .

Adjacent to the engaging recesses and convex portions 5.6 that engage with each other, an adhesive water stop material 7a having a composition similar to that of the water stop band 7 described above is applied.
is intervening. This water stop material 7a may be provided along the inside of the recess 5, or may be provided so as to cover the convex portion 6. By interposing the waterproof material 7a, a complete water-stopping effect can be obtained even when no tensile force is applied between the waterproof sheets 1 and 2.

As described above, the waterproof sheet joint structure of the present invention provides a belt-shaped engaging portion along the edge of each waterproof sheet that is to be joined to each other, and a strip-shaped engaging portion that extends along the edge of each waterproof sheet that is to be joined to each other. An engaging convex portion is provided on the other engaging portion, and an engaging concave portion is provided along the edge of the other engaging portion, and the engaging convex portion and the engaging concave portion are engaged and overlapped with each other. Since an adhesive water-stopping material is interposed between the engaging portions adjacent to the retaining protrusions and concave portions, there is no need for skilled adhesion or fusion techniques for joining work, and there is no need for a waterproof sheet. Even when the sheet is sagging with no tensile force acting on it, a complete water-stopping effect can be obtained. Further, using a simple and inexpensive construction device, the joining work can be performed extremely easily and efficiently even in water or in a place where water is present, or in a place where workability is poor.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing the edges of each waterproof sheet in an embodiment of the present invention, Fig. 2 is a schematic cross-sectional view showing the joining process of the waterproof sheets, and Fig. 3 shows the joined waterproof sheets at the joint. FIG. 4 is a sectional view showing another embodiment of the present invention, and FIG. 5 is a sectional view showing an example of a conventional waterproof sheet joint structure. 1.2... Waterproof sheet, 3.4... Engaging portion, 5...
・Engaging recess, 6... Engaging protrusion, 7... Water stop, 8...
... Pressure roller, 9 ... Guide plate, 10.11 ... Guide roller, 12 ... Core, 13 ... 1 call, 14.
・Kiln roller.

Claims (1)

[Claims] A joint structure for joining the edges of waterproof sheets to each other, wherein a band-shaped engaging portion is provided along each edge of each waterproof sheet to be joined to each other, and
One engaging portion is provided with an engaging protrusion and the other engaging portion is provided with an engaging recess along the edge, and the engaging protrusion and the engaging recess are engaged with each other. A joint structure of a waterproof sheet, characterized in that an adhesive water stop material is interposed between the overlapping engaging parts adjacent to the engaging protrusions and recesses.