JPH0344910Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention positions and holds drains, which drain water from roofs, balconies, floors, etc. of buildings, in a predetermined position during concrete pouring, and The present invention relates to a device for protecting a threaded part of a drain.

[Prior Art] There are various types of drains mentioned above, such as roof drains for draining water from roofs, etc., and corner drains for draining water from balconies. It is held in a predetermined position in the formwork, and then concrete is cast and buried in the concrete, and after the concrete has hardened and the formwork is removed, a drain pipe is connected to this drain. A conventional holding device that holds this drain in a predetermined position is composed of a mounting part that is attached to the formwork, a fixing bolt that projects from the mounting part, and a cylindrical spacer.
Attach the above mounting part to the formwork with nails, etc., insert the fixing bolt into the drainage hole of the drain, and insert the above cylindrical part between the tip of the drain pipe connection part of this drain and the formwork. A spacer is interposed, a nut is screwed onto the tip of the above fixing bolt, and by tightening this nut, this drain and spacer are pressed against the formwork via the fixing plate, and this drain is held in a predetermined position. was configured to do so. but,
In this conventional method, when concrete is poured, concrete flows in through the gap between the spacer, formwork, and drain, and the concrete that flows in adheres to the threaded part of the drain pipe connection, causing the concrete to flow into the drain pipe. There were some problems, such as making it difficult to connect.

[Problems to be solved by the invention] The invention was developed based on the above circumstances, and provides a drain protection/retention device that can prevent concrete from flowing in and adhering to the threads, etc. This is what we provide.

[Means for solving the problems and their effects] The present invention consists of a main body attached to a formwork, a drain fixing member such as a bolt protruding from the main body, and a foamed synthetic resin material such as styrofoam. It is provided with a threaded part protection member which tightly fits into the threaded part of the drain pipe connection part of the drain and has an insertion hole through which the above-mentioned drain fixing member is inserted. Therefore, even if concrete were to flow in during concrete pouring, the above-mentioned soft foamed synthetic resin thread protection member is tightly fitted to the thread of the drain. This inflowing concrete can be prevented from adhering to the threaded portion.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. First, the structure of a drain, for example a corner drain, held by the positioning and holding device of the present invention will be explained. This corner drain 1 is constructed by press-molding a stainless steel plate, and includes an L-shaped main body portion 2. A drain port 3 is formed in the main body portion 2, and a connecting portion 4 for connecting a drain pipe is welded to the rear side of the drain port 3. A thread 5 is formed on the inner circumferential surface of the drain pipe connecting portion 4, and a stepped portion 7 is formed on the front end side of the thread 5. Further, a flange portion 6 having an L-shaped cross section is welded to the outer periphery of the rear end portion of the drain pipe connecting portion 5.

Next, a protection/holding device of the present invention that holds such a roof drain 1 in a predetermined position and protects its threaded portion will be explained. This device includes a main body 10 press-molded from a steel plate or the like.
0 is provided with a flange-shaped attachment portion 11 and a cylindrical holding/spacer portion 12 that integrally projects from the attachment portion. And the above mounting part 1
1 has a plurality of attachment holes 16 formed therein, and is configured such that the attachment portion 11 can be attached to the formwork 8 with nails 17 or the like. Further, the holding/spacer section 12 has a predetermined length, and also serves as a spacer for holding the corner drain at a predetermined distance from the formwork 8. Further, the distal end of the holding/spacer portion 12 is formed into a fitting portion 13 that fits into the distal end of the drain pipe connecting portion 4 of the corner drain 1. This fitting part 13
is formed in such a size that its outer periphery fits into the inner periphery of the flange portion 6 of the drain pipe connecting portion 4 described above. Further, this mounting portion 13 has an annular fitting groove 14 formed on its front surface. The flange portion 6 of the drain pipe connection portion 4 is connected to this fitting portion 13.
The distal end portion of the drain pipe connecting portion 4 is configured to be accommodated in the fitting groove 14 when the drain pipe connecting portion 4 is fitted to the outer peripheral edge of the drain pipe connecting portion 4 . Further, a corner drain fixing member, for example a fixing bolt 15, is provided protruding from the center of the distal end surface of the holding/spacer part 12. The fixing bolt 15 is inserted into the drainage port 3 of the corner drain 1, and a fixing plate 18 is inserted through the tip thereof, and a nut 19 is screwed thereto. Fixed plate 1 above
8 is formed to be longer than the diameter of the drain port 3, and its both ends abut against the edge of the drain port 3, and by tightening the nut 19, the corner drain is held and the tip of the spacer portion 12 is fitted. It is configured to press against the joint portion 13.

The central axis of the holding/spacer part 12 is inclined with respect to the mounting part 11 by a predetermined angle corresponding to the drainage gradient, so that the mounting part 11 is attached to the formwork 8. In this case, the fitting portion 13 and fixing bolt 15 are configured to be inclined upward by this predetermined angle θ.

Further, this positioning and holding device is equipped with a threaded portion protection member 20. This thread protection member 2
0 is made of foamed synthetic resin such as expanded polystyrene and has a cylindrical shape. The diameter of the thread protection member 20 is set to such a diameter that it can be lightly press-fitted into the inner surface of the thread 5 of the drain pipe connection 4 of the corner drain 1, and its length is set such that it can be lightly press-fitted into the inner surface of the thread 5 of the drain pipe connection 4 of the corner drain 1. 5
corresponds to the length of Further, a stepped portion 21 is formed at the tip of this thread protection member 20, and this stepped portion 21 has a shape corresponding to the stepped portion 7 on the inner surface of the drain pipe connecting portion 4, and is tightly attached to the stepped portion 7. are configured to mate. In addition, this threaded portion protection member 20
An insertion hole 22 for inserting the above-mentioned fixing bolt 15 is formed in the center.

Next, a procedure for holding and fixing the corner drain using such a protection/holding device will be explained.

First, the main body 10 of this device is positioned at a position corresponding to the position where the corner drain 1 is installed, and the main body 10 is attached to the formwork 8 with nails 17 or the like. Next, the thread protection member 20 is press-fitted into the drain pipe connection portion 4 of the corner drain 1. Then, the fixing bolt 15 is inserted into the insertion hole 22 of the thread protection member 20, and the flange part 6 of the drain pipe connection part 4 of the corner drain 1 is inserted into the fitting part 13 of the holding/spacer part 12. mate. Then, the fixing plate 18 is inserted into the tip of the fixing bolt 15 protruding from the drain port 3 of the corner drain 1, and the nut 19 is further screwed and tightened to fix the corner drain 1. Then, if necessary, the corner drain 1 is cured, concrete is poured, and the corner drain 1 is buried in the concrete. When the concrete hardens, remove the nuts 19 and fixing plate 18, remove the formwork 8, main body 10 and thread protection member 20, and attach a drain pipe (not shown) to the drain pipe connection part of the corner drain 1. Connect.

Then, the above-mentioned fitting part 13 and fixing bolt 1
5 is tilted upward by a predetermined angle, so
This corner drain 1 is buried in the concrete with an inclination of a predetermined angle corresponding to the drainage slope. Moreover, the main body 10 of this positioning and holding device is
Since the mounting portion and the holding/spacer portion 12 are integrally formed, the corner drain 1 can be held securely, and the corner drain can be tilted by a predetermined angle and positioned accurately.
In addition, this mounting part 11, holding/spacer part 1
2. The fitting part 13 is integrally formed and there is no seam, and the fitting part 13 has an accurate shape and fits closely to the flange part 6 of the drain pipe connection part, so that concrete can be prevented from flowing into the fitting part 13. Furthermore, a fitting groove 14 is formed in this fitting part 13, and since the tip of the drain pipe connecting part 4 fits into this fitting groove 14, the gap between them becomes maze-like. Even if concrete should flow in, it will not flow to the threaded portion 5. Furthermore, since a thread protection member 20 made of styrene foam or the like is press-fitted into the thread 5, the thread protection member 20 will come into close contact with the inner surface of the thread 5, and should concrete not flow into it. However, this is completely prevented from adhering to the threaded portion 5.

Note that the present invention is not limited to the above embodiments. For example, the main body does not necessarily have to have the above structure, and may include a separate spacer. Furthermore, the present invention is applicable not only to corner drains but also to roof drain protection and holding devices.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with FIG. 1 being an exploded perspective view and FIG. 2 being a longitudinal cross-sectional view with the corner drain held. 1...Corner drain, 4...Drain pipe connection, 5
...Thread part, 10...Main body, 11...Mounting part,
12... Holding/spacer part, 13... Fitting part, 1
4... Fitting groove, 15... Fixing bolt, 20... Threaded portion protection member.

Claims (1)

[Scope of utility model registration request] It consists of a main body that is attached to the formwork, a drain fixing member that protrudes from the main body, and a foamed synthetic resin material, and is tightly fitted to the threaded part of the drainage pipe connection part of the drain, and the drain fixing member is inserted through it. 1. A drain protection/holding device, comprising: a thread protection member having an insertion hole.