JPS63251565A - Extensible joint material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) The present invention provides a waterproof layer, etc., which is buried between the rising part of a concrete flat roof and the holding concrete to protect it from expansion and contraction of the holding concrete. Regarding protective expansion joint material.

(Prior art) Conventionally, in the case of concrete flat roofs, in order to alleviate the expansion and contraction of the holding concrete 15, joint material for the earthen floor was placed in a grid pattern on a flat area several tens of millimeters away from the base of the parapet 13, as shown in Fig. 7. It was assigned to Some of these joint materials have a crown body 22 made of hard vinyl chloride covering the upper end of a plate body 21 made of foamed polyethylene, and non-vulcanized rubber 23 attached to the side and top surfaces of the crown body. This joint material deforms in response to the expansion/contraction and vibration of the holding concrete 15, and prevents the effects from reaching the building frame, waterproof layer 9, etc.

(Problems to be Solved by the Invention) However, in the above joint material, the rising portion 19 of the waterproof layer 9
The expansion/contraction and vibration of the holding concrete 15 in contact with the concrete 15 cannot be sufficiently absorbed, and excessive force is applied to the base of the parapet 13 and the waterproof layer 9, resulting in cracks 30 appearing at the base of the parapet 13, and the waterproof layer 9 breaking in the vicinity. There was a fear that it would happen. Therefore, rainwater permeates into the structure through the cracks 30 and fractured parts,
This resulted in peeling of the interior and exterior cloth, rims, and waterproof coating, which was not only aesthetically undesirable, but also caused the deterioration of the building frame to accelerate significantly. Also, to completely repair this,
Another problem was that it required a huge amount of labor and expense.

The present invention was made based on the above circumstances, and an object of the present invention is to provide an expansion joint material that is easy to construct and that protects the parapet base and the rising portion of the waterproof layer from expansion and contraction of the holding concrete and vibration.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above-mentioned object, the expansion joint material according to the present invention has a main body made of a hard elastic resin, which has a belt shape, and is attached to one side edge of a horizontal upper wall. A side wall in contact with the inner surface of the parapet base is provided facing downward, and a side wall in contact with the holding concrete is provided facing downward on the other side edge, and an elastic layer with high elasticity in the opposite direction is provided between both walls. It is characterized by:

(Example) Hereinafter, the elongated and contracted material according to the present invention will be specifically explained with reference to the drawings. Figures 1 and 2 show an example of the joint material of the present invention, in which the main body 1 has downward side walls 3°3 provided on both sides of an upper wall 2 forming a wide band shape. It is made of a durable and moderately elastic material, such as hard vinyl chloride. Further, an elastic layer 20 having excellent elasticity in the opposite direction is formed between the both side walls 3.3. The elastic layer 20 includes an air portion 6 formed between three intermediate walls 4 provided on the lower surface of the upper wall 2 in parallel with the side walls 3;
and a side wall 3. Here, the lower end of each air portion 6 is closed by a bottom wall 5, and the soft resin member 7 is made of, for example, foamed polyethylene. or,
A chamfered portion 11 is provided at the lower end of the side wall 3 and the soft resin member 7 in contact with the rising portion 10 of the waterproof layer 9 so as to be in close contact with the rising portion 10 of the waterproof layer 9. Further, the upper surface of the upper wall 2 is covered with synthetic rubber 12, and the side wall 3 on the base side of the rose pet 13
is extended upward, and an additional waterproof sheet 14 is pasted from the outer surface of the side wall 3 through the chamfered portion 11 to the lower surface of the bottom wall 5. Further, non-vulcanized butyl rubber 16 is pasted on the outer surface of the side wall 3 in contact with the edge of the holding concrete 15 in order to maintain a close contact state.

Next, FIG. 3 shows a second embodiment of the joint material of the present invention, in which a main body 1 is provided with downward side walls 3, 3 on both side edges of an upper wall 2.
are made of hard vinyl chloride resin, and both side walls 3, 3
A soft resin member 7 is sandwiched between them to form an elastic layer 20, and this elastic layer 20 is made to protrude below the side wall 3. A chamfered portion 11 is provided from the lower end of the side wall 3 on the parapet 13 side to the lower end of the soft resin member 7 on the parapet 13 side, so that it can come into close contact with the waterproof layer rising portion IO. In addition, a locking protrusion 8 is provided on the inner surface of the first side walls 3, 3 to prevent the soft resin member '7 from coming off, and a synthetic rubber 12 is covered on the upper surface of the upper wall 2, and a locking protrusion 8 is provided on the inner surface of the side walls 3, 3 to prevent the soft resin member '7 from coming off. On the outer surface of the side wall 3 that is in contact with the side wall 3, that is, the side wall 3 that faces the side wall 3 with the chamfered portion 11,
Non-vulcanized butyl rubber 16 is pasted.

Furthermore, what is shown in FIG. 4 is a third embodiment of the joint material of the present invention, in which downward side walls 3°3 are provided on both side edges of the upper wall 2,
Several intermediate walls 4 parallel to the side walls 3 are provided on the lower surface of the top wall 2 at equal intervals, and the lower ends of each intermediate wall 4 and both side walls 3.3 are connected by a bottom wall 5, and between the side walls 3, 3. A plurality of rectangular air portions 6 are provided to form an elastic layer 20. The side wall 3 on the parapet 13 side and the intermediate wall 4 next to it are shorter than the other side wall 3 and intermediate wall 4, and the bottom wall 5 slopes upward on the parapet 13 side.
A chamfered portion 11 matching the shape of the rising portion 10 of the waterproof layer is formed. Furthermore, synthetic rubber 12 is pasted on the upper surface of the upper wall 2.

The joint material of the present invention has the above-mentioned structure, and before pouring the holding concrete 15, the side wall 3 having the chamfered part 11 at the lower end is brought into close contact with the rising part 10 of the waterproof layer, and the chamfered part 11
The joint material of the present invention is placed over the entire circumference of the roof while bringing the joint material into close contact with the bent portion 19 of the waterproof layer 9, and then the holding concrete 15 is poured so that it has approximately the same height as the top wall 2 of the joint material of the present invention. do. Next, bricks 17 are piled up on top of the upper wall 2 with mortar 18 up to the chin of the parapet 13, and the rising portion 10 of the waterproof layer is pressed to the upper end. When the holding concrete 15 expands, the joint material buried in this way
, 3 becomes narrower as the main body 1 deforms, the elastic layer 2 becomes narrower.
° is also compressed, and most of the expansion of the holding concrete 15 is absorbed by the deformation of the joint material, so that it does not affect the rising part 10 of the waterproof layer or the base of the rose bed 13.

The joint material of the present invention has a waterproof layer rising portion 10 as shown in FIG.
Also, as shown in FIG. 5, a part of the bottom wall 5 forming the air section 6 may be cut out to increase lateral elasticity.

〔Effect of the invention〕

As described above, the expansion joint material according to the present invention is provided with a side wall in contact with the waterproof layer attached to the base of the parapet and a side wall in contact with the edge of the holding concrete on both sides of the earthen wall, and a side wall in contact with the edge of the pressed concrete in the opposite direction. Since it has an elastic layer that is highly stretchable, most of the effects caused by the expansion of the holding concrete are absorbed by the joint material of the present invention and do not extend to the rising part of the waterproof layer or the base of the parapet, which prevents cracks from forming at the base of the parapet. There is no risk that the rising part of the waterproof layer will break.

Therefore, falling off of the exterior wall tiles, peeling of the waterproof coating, deterioration of the building frame, etc. caused by rainwater intrusion through cracks in the base of the parapet or breaks in the waterproof layer can be completely prevented by using the joint material of the present invention. Furthermore, the joint material of the present invention can be buried together with the pressing concrete when it is placed, and the construction can be done easily and without much effort.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the expansion joint material according to the present invention, Fig. 2 is a sectional view showing its usage, Figs. 3 to 5 are sectional views showing other embodiments, and Fig. 6 is a sectional view of the expansion joint material of the present invention The seventh sectional view showing other usage conditions of the material is a sectional view near the parapet of a conventional flat roof. 1...Main body, 2...Top wall, 3...Side wall, 9...
Waterproof layer, 10... Rising part, 15... Holding concrete, 20... Elastic layer Fig. 1 Fig. 2
Figure 6

Claims (1)

[Claims] A main body 1 made of a hard elastic resin has a horizontal upper wall 2 in the form of a belt, and a side wall 3 extending downward in contact with a rising part 10 of a waterproof layer 9 on one side edge, and a presser on the other side edge. An expansion joint material characterized in that a side wall 3 in contact with an edge of concrete 15 is provided opposite to said side wall, and an elastic layer 20 having high elasticity in the opposite direction is provided between both side walls. .