JPS6055664B2 - Joint material for mortar finishing of flat roofs, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in joint materials used in mortar finishing construction methods, such as presser mortar placement in flat roof waterproofing construction methods.

In mortar finishing construction, the placed mortar expands and contracts repeatedly as the temperature changes, causing cracks.

To prevent this, the mortar is divided into required areas by interposing a joint material. By the way, the thickness of the mortar layer differs depending on the location and purpose, so it is best to stock several types of joint materials with different height dimensions, or to attach legs to the lowest height one and adjust it to the desired height. need to be adjusted accordingly.

Also, to adjust the desired height by attaching legs, if you attach the legs at the required intervals in the length direction of the joint material, it will appear as if the mortar on both sides is separated by sandwiching the joint material. In the lower layer, it is continuous under the joint material and cannot serve the purpose of preventing cracks due to expansion and contraction. Furthermore, although the slab concrete is horizontal, the mortar placed on top of it needs to have a sloped surface for drainage during rain, and in this case, the height of the joint material also needs to be changed sequentially. However, on-site cutting to change the height of the joint material requires the use of attached equipment, which requires precision and skill, resulting in high costs. There is a method of installing the joint material and changing the height of the joint material one by one, but this is also extremely complicated on-site work and is difficult to construct.

This invention solves all of the above-mentioned conventional drawbacks.
Examples of the present invention will be described below with reference to the accompanying drawings.
In Fig. 1, 1 is the roof part of the flat roof, 2 is the parapet, 3 is the concrete slab, 4 is the waterproof sheet layer, 5 is the holding mortar layer that protects the waterproof sheet layer, and A is the required interval between the mortar layers 5. 6 is a protective cap for the joint material, and 7 is a cap for the parapet 2.

As shown in FIG. 3, the joint material A is an elongated body with a rectangular cross-sectional shape, and is made of an elastic material that can be compressed and restored. In addition, this joint material corresponds to the maximum layer thickness of the mortar layer, for example, the height (longitudinal width in the cross-sectional shape of the joint material) is 10-, and the wall thickness is 1 Ch.
7a.

This joint material is made of a stack of strips 8 having a required thickness, for example, 5-thickness, at least 112 in height, and each strip is sewn together at the center in the width direction using a sewing machine.

9 is the sewing muscle of the sewing machine.

Each strip can be torn at the sewing machine seam. Therefore, each strip is preferably made of, for example, foamed rubber or synthetic resin, but may be made of other materials as long as it is breakable. In addition, as shown in the figure, the joint material A is attached to the laminated strip part and the joint material main part 10.
If both are bonded and integrated, the joint material main portion 10 will not break, so it can be made of any material as long as it has compression recovery elasticity.

FIG. 5 shows a main part 10 of the joint material and a separated laminated strip part. Using this joint material A, mortar layer 5
To form this, the strips are peeled off one by one from the largest strip 8a so that the height of the joint material matches the layer thickness of the mortar to be cast. In addition, when creating a water gradient on the surface of the mortar layer 5, the joint material A-1, which is placed in the direction of the gradient in Fig. 2, is first adjusted to a height that corresponds to the maximum layer thickness of the mortar, and then As shown in Figure 4, the strips are sequentially peeled off and cut midway, and the cutting and removal positions are sequentially varied so that the remaining portion increases sequentially, so that the height matches the thickness of the mortar's inclined cross-section layer. Use different joint materials.

In FIG. 4, a indicates the cut portion. After the joint materials A and A-1, whose height dimensions have been adjusted in this way, are arranged vertically and horizontally while maintaining the required spacing, mortar 5- is placed until the height matches the height of the joint materials, and these joint materials are placed using a ruler. Finish the surface of the mortar.

This invention is as described above, and this joint material is made of an elongated body made of an elastic material and has a rectangular cross section, and a strip of the required thickness is sewn in the longitudinal direction of the rectangular cross section by a sewing machine at the center in the width direction. Since it is made into a sawn body and each strip can be broken at the sewn portion, it has the effect that the height of the joint material can be easily and accurately changed and adjusted at the construction site.

In addition, since this joint material only needs to be of one height, there is no inventory loss due to inventory of joint materials of various sizes as in the past.
This has the advantage that there is no inconvenience such as having to replenish a certain size item quickly due to lack of stock.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and Fig. 1 is a vertical sectional view of a portion of an example of mortar finish construction on a flat roof, Fig. 2 is a plan view of the main part of the same, and Fig. 3 is a construction joint for the same. FIG. 4 is an enlarged perspective view of a portion of an example of the material, FIG. 4 is a perspective view of a portion of another example of the same material, and FIG. 5 is a partially cutaway front view of a portion of another example of use of the same material. A, A-1...Gout material, 8,8a...
Band-shaped body, 9...Sewing machine sewing part.

Claims (1)

[Scope of Claims] 1. A rectangular cross-sectional body made of an elastic material, and this elongated body is a stack of strips having a required thickness at the short width of the rectangular cross-section, and each strip is sewn at the center in the width direction. A joint material for mortar finishing construction of flat roofs, etc., characterized by being sewn into one piece and being able to be broken at the sewn part. 2. The joint material for mortar-finished construction of flat roofs and the like according to claim 1, wherein the laminated band-like body occupies at least 1/2 of the longitudinal width of the joint material having a rectangular cross section.