JPH0348983Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application This invention relates to a joint plate used for stretching a waterproof sheet.

BACKGROUND TECHNOLOGY Conventionally, as shown in FIG. 9, a bonding plate used when attaching a waterproof sheet to a concrete wall surface such as a flat roof has a flat bonding plate main body 24 made of a vinyl chloride resin-coated steel plate in the center. A screw insertion hole 25 was provided.

Problems to be Solved by the Invention However, in such a conventional joint plate 23, when it is attached to the concrete wall surface 21 with the fixture 28, the head 29a of the screw 29 of the fixture 28 is lowered from the upper surface of the joint plate main body 24. protrudes upward,
As a result, the waterproof sheet 22 swells up at that portion, and when a worker or the like steps on the protruding portion of the waterproof sheet 22 from above, there is a risk that a hole may be formed in the waterproof sheet 22.

Therefore, conventionally, as shown in FIG. 10, a joint plate 27 has been proposed in which a screw head accommodating portion 26 having a screw insertion hole 25 is provided in the center of a joint plate main body 24 in a downwardly protruding manner. In the joint plate 27, since the tips of the screw head accommodating portions 26 in the center touch the concrete wall surface 21, the joint plate 27 tilts to one side during installation, and the concrete wall surface 2
There has been a problem in that if the end portion 27a of the joining plate on the side farther away than 1 is stepped on with a foot, the waterproof sheet 22 may be torn.

In order to solve such problems, the following methods have been implemented in the past.

First, as shown in FIG. 11, by providing a recess 30 at a predetermined location on the concrete wall surface 21 and fitting the screw head accommodating portion 26 into the recess 30, the lower surface of the joint plate 27 is made of concrete. Wall surface 21
I made it so that it is in contact with This is certainly the joint plate 27
Although the concrete wall surface 21 can be prevented from tilting,
There was a problem in that the work of providing the recesses 30 at predetermined locations was troublesome and time consuming. In particular, when the joining plate 27 is in the form of a strip and is provided with two or more screw head accommodating parts 26, the recess 3
0 and the screw head accommodating portion 26 is very troublesome and there is a problem that workability is poor.

Second, as shown in FIG. 12, a seat plate 31 having a thickness approximately equal to the height of the screw head accommodating portion 26 is placed between the joint plate 27 and the concrete wall surface 21.
was used to prevent the joint plate 27 from tilting.
However, this increases the cost because the seat plates 31 are laid under all the joint plates 27, and the joint plates 27 and 31 are fixed together to the concrete wall 21, so the joint plates 27 are fixed. There was a problem that the work was troublesome.

The purpose of this invention is to solve the above-mentioned problems, to provide a waterproof sheet that can be placed stably on a concrete wall surface, can be fixed to the concrete wall surface extremely easily, and can be stretched with extremely high workability. To provide a joint plate used for stretching a waterproof sheet that can prevent the waterproof sheet from being damaged and is inexpensive.

Means for Solving the Problems In order to achieve the above object, this invention includes a joint plate main body and a screw head accommodating portion provided in the center of the joint plate body in a downwardly projecting manner and having a screw insertion hole. The gist of the joint plate is a joint plate used for stretching a waterproof sheet, in which the main body of the joint plate is provided with a tilt-preventing convex portion that protrudes downward from the top of a screw head accommodating portion.

Embodiment Next, an embodiment of this invention will be described based on the drawings.

In FIG. 1 showing the first embodiment of this invention,
The joint plate 3 according to this invention includes a joint plate main body 4, a screw head accommodating portion 6 provided at the center thereof in a downwardly protruding manner and having a screw insertion hole 5, and a peripheral edge of the joint plate main body 4. is bent, and a tilt-preventing convex portion 7 is provided that protrudes downward with the top P of the screw head accommodating portion 6 as a reference.

When such a joint plate 3 is placed on a concrete wall surface 1 such as a flat roof, it is stable, and therefore it can be easily fixed to the concrete wall surface 1 with a fixing device 8 consisting of screws 9 and spreader plugs 10. Therefore, the waterproof sheet 2 can be stretched with extremely good workability. Furthermore, since the heads 9a of the screws 9 do not protrude above the upper surface of the joint plate 3, damage to the waterproof sheet 2 can be prevented. The joint plate 3 is made of, for example, a metal plate, a synthetic resin-coated metal plate such as a vinyl chloride steel plate, or a hard synthetic resin plate. Although the shape of the joining plate 3 is arbitrary, it is usually circular, square, polygonal, or strip-shaped.

FIG. 2 shows a second embodiment of this invention, in which the top P of the screw head accommodating portion 6 in the center of the joint plate main body 4 is used as a reference, and the screw head accommodating portion 6 is inclined so as to gradually protrude downward from this point toward the periphery. A tilt prevention convex portion 11 is provided over almost the entire joint plate body 4.

3 and 4 show a third embodiment of this invention, in which three anti-tilt protrusions 1 are provided on the joint plate main body 4.
2 are provided radially in a downwardly protruding manner and at predetermined intervals.

5 and 6 show a fourth embodiment of this invention, in which three anti-tilt protrusions 13 having a substantially U-shaped cross section are provided at required locations on the joint plate body 4.

7 and 8 show a fifth embodiment of this invention, in which two anti-tilt protrusions 14 are provided on both left and right sides of the joint plate main body 4. These tilt prevention convex portions 14 are approximately fan-shaped when viewed from above, and have a flat bottom portion 14a and slope portions 14 that are connected to the flat bottom portion 14a on three sides.
It is composed of b.

The other points of the second to fifth embodiments are the same as those of the first embodiment, and therefore, the same reference numerals are given to the same parts in the drawings.

Note that the shape and number of the anti-tilt protrusions provided on the joint plate 3 are not limited to those of the above embodiment, and in short, the joint plate 3 has a structure that is stable when placed on the concrete wall surface 1. It is sufficient if a certain type of tilt prevention convex portion is integrally provided. Furthermore, the joint plate 3 according to this invention can be applied not only to the waterproof sheet 2 but also to the case of fixing other sheets to the concrete wall surface 1 or the like.

Effects of the invention As described above, this invention provides a joint plate that includes a joint plate main body and a screw head accommodating portion that is provided at the center of the joint plate in a downwardly protruding manner and has a screw insertion hole. Since the joint plate is provided with a tilt-preventing protrusion that protrudes downward from the top of the screw head accommodating part, it is stable when placed on a concrete wall, and therefore it can be easily fixed to a concrete wall. Therefore, the waterproof sheet can be stretched with extremely good workability. Furthermore, since the joint plate does not tilt around the screw head accommodating portion as in the conventional case, damage to the waterproof sheet can be prevented. Furthermore, since the joint plate is integrally provided with the anti-tilt convex portion, there is no need to use a seat plate like in the past, resulting in an effect of lowering costs.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the first embodiment of this invention;
Fig. 2 is a sectional view showing a second embodiment of this invention, Fig. 3 is a plan view showing a third embodiment of this invention, and Fig. 4 is a sectional view showing a second embodiment of this invention.
The figures are a sectional view taken along the line of FIG. 3, FIG. 5 is a plan view showing the fourth embodiment of this invention, FIG. 6 is a sectional view taken along the line of FIG. 5
A plan view showing the embodiment, and FIG. 8 is a sectional view taken along the line of FIG. 7. FIGS. 8 to 12 are sectional views showing four conventional examples. 1... Concrete wall surface, 2... Waterproof sheet,
3... Connection plate, 4... Connection plate main body, 5... Screw insertion hole, 6... Screw head accommodating part, 7, 11, 12, 1
3, 14...Tilt prevention convex portion, 8...Fixing tool, 9...
...Screw, 9a...Screw head, P...Top of screw head accommodating part.

Claims (1)

[Scope of utility model registration request] In a joint plate including a joint plate main body 4 and a screw head accommodating portion 6 which is provided in the center of the joint plate in a downwardly protruding manner and has a screw insertion hole 5, the top P of the screw head accommodating portion 6 is provided in the joint plate main body 4. A joint plate used for stretching a waterproof sheet, which is provided with tilt-preventing convex portions 7, 11, 12, 13, and 14 that protrude downward with reference to .