JP2000160845A - Lid for slab piping hole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a lid capable of easily closing an opening thereby avoiding a danger on a job site by providing a plurality of attaching portions to be linked to the inner wall of a piping hole in a freely attachable manner on the rear surface of the main body of a lid formed with the peripheral edge portion sloped to a thin wall. SOLUTION: A lid 1 is made of a synthetic resin, metal material or the like and the whole is formed almost to a disc shape. On the rear surface of the main body 2 of the lid, four lock members 11 are attached at equal spacing in the circumferential direction, and a sloped surface 3 which becomes thin toward the tip is provided. The lock member 11 has a linking portion curved and formed to a curvature corresponding to the inner diameter of the piping hole 22 and an attaching portion jointed in one body and, by placing it in an attaching recessed portion of the main body 2 of the lid, it can be attached in a freely detachable manner. After pouring concrete and forming a piping hole 22, the lid is pushed down from the above into the opening 23 by resisting against the elastic force in the radius direction of the locking member 11. In this way, the piping hole in the slab can be easily closed until the start of piping work, thereby preventing the danger of stumbling and improving the workability in the work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to an opening of a pipe hole of a slab formed by casting concrete, and prevents slabs from being hindered by walking or the like until the pipe work is started. The present invention relates to a cover for a slab piping hole.

[0002]

2. Description of the Related Art Conventionally, when a slab is cast from concrete, a pipe hole for vertically penetrating various pipes is formed in the floor of the slab by attaching a sleeve or the like to a formwork. In general, the sleeve has a cylindrical shape, and after being erected on a formwork at a construction site, concrete is poured. Thereafter, the sleeve is removed to form a pipe hole in the slab.

[0003] By the way, after the pipe hole is formed in the slab, the opening of the pipe hole is exposed until the pipe work of the next step is started, so that the contractor walks on the slab floor. When doing so, it may be dangerous to trip over the pipe hole, and in order to avoid this, it was necessary to work while paying attention to the opening of the pipe hole on the floor surface.

Therefore, for example, a lid 31 as shown in FIGS. 10 to 12 is attached to the opening 23 of the pipe hole 22 of the slab 21 and the opening 23 is closed.

The lid 31 shown in FIG. 10 has a lid main body 32 made of a square or cylindrical plate material and an anti-slipping plate 33 erected on the lid main body 32. The lid 31 shown in FIG.
The individual deviation prevention pins 34 are erected. In general, these lids 31 are easily made each time by scraping off the scraps of the plate at the construction site and nailing the slip prevention plate 33 and the slip prevention pin 34, and are attached to the opening of the piping hole. I have.

[0006]

However, this kind of conventional lid, even though it is easily made, is made each time at a construction site, and is not suitable for the construction of large buildings and condominiums. Due to the large number of such operations, a large amount of time and labor was required for operations such as searching for scraps and cutting them into a size corresponding to the opening size. In addition, since a scrap of a plate is usually used, there is a case where the cover 31 stumbles at a corner.

Accordingly, the present invention provides a slab piping hole which can easily block the opening of the piping hole of the slab, can surely avoid a danger such as tripping at the opening at the time of walking, and can improve workability of construction work. It is an object of the present invention to provide a lid.

[0008]

According to the first aspect of the present invention, the lid of the slab piping hole is formed so that the front side of the peripheral portion is formed with an inclined surface having a thin end, and is detachably attached to the opening of the slab piping hole. And a mounting portion that is engaged with the inner wall of the pipe hole to attach the lid body.

According to a second aspect of the present invention, there is provided a lid for a slab piping hole, wherein the mounting portion described in the first aspect is attached to the lid body as a detachable separate body.

According to a third aspect of the present invention, there is provided a lid for a slab piping hole, wherein the mounting portion according to the second aspect comprises a plurality of locking members.

According to a fourth aspect of the present invention, there is provided a cover for a slab piping hole according to the third aspect of the present invention, wherein the attachment portions of the locking member on the back surface of the lid main body are provided at a plurality of locations different in distance from the center. It is a thing.

According to a fifth aspect of the present invention, in the slab piping hole lid, a pair of mounting portions of the locking member on the back surface of the lid main body are provided at least at opposite positions on the same center line. It was done.

According to a sixth aspect of the present invention, there is provided a cover for a slab piping hole, wherein the lid body according to any one of the first to fifth aspects has a mounting strength such that a person can walk on the upper surface thereof. Things.

According to a seventh aspect of the present invention, there is provided a cover for a slab piping hole, wherein a reinforcing rib is provided on a back surface of the lid body according to the sixth aspect.

According to an eighth aspect of the present invention, there is provided a cover for a slab piping hole, wherein the lid according to any one of the first to seventh aspects is provided with a removing portion for removing the slab piping hole from the slab piping hole. It is.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the figure, a lid 1 is formed in a substantially disk shape by a synthetic resin, a metal material or the like, and is attached to an opening 23 of a cylindrical pipe hole 22 formed in a slab 21 after casting concrete. . The lid 1 has four locking members 11 detachably attached to the back surface of a disk-shaped lid main body 2 at equal intervals in the circumferential direction. The lid body 2 has an inclined surface 3 which becomes thinner toward the front end on the surface of the peripheral portion exposed to the indoor side. As shown in FIG. 4, the rear surface side of the slab 21 of the lid body 2 facing the pipe hole 22 has a mounting portion 4 for mounting the locking member 11 at equal intervals on two types of large and small circumferences.
Are provided four by four. Note that the locking member 11 corresponds to a mounting portion in the claims.

Each mounting portion 4 has a pair of locking flanges 6 protruding in the circumferential direction facing the end of a mounting recess 5 formed of a square recess. 11 can be detachably attached. The reason why the attached portion 4 is provided on the two types of large and small circumferences is to enable the slab 21 to cope with the piping holes 22 having two types of inner diameters. A reinforcing rib 7 is provided on the back surface of the lid main body 2 in order to obtain a mounting strength that does not damage the upper surface even when the installer walks.

On the other hand, the locking member 11 is a slab 21 having a fixed width.
The locking piece 12 having a curvature corresponding to the inner diameter of the pipe hole 22 is integrally joined to a square plate-shaped attachment portion 13. By being pressed against the inner wall of the pipe hole 22, it is elastically bent inward. The locking member 11 accommodates the mounting portion 13 in the mounting concave portion 5 of the mounted portion 4 and then inserts the mounting portion 13 into the gap between the locking flange 6 and the mounting concave portion 5 to abut the center side of the lid body 2. It can be detachably attached to the lid body 2 by pushing down to the portion.

Next, the attachment and operation of the thus constructed lid of this embodiment will be described. By forming concrete by placing a cylindrical sleeve or the like on a formwork or the like to form a pipe hole 22 penetrating vertically through which a pipe is passed through the slab 21, an opening 23 of the pipe hole 22 is formed. In order to mount the lid 1 on the opening 23, as shown in FIG. 6, the lid 1 may be pushed into the opening 23 from above against the elastic force of the locking member 11 in the radial direction. At this time, the locking piece 12 of the locking member 11 of the lid 1 can be easily inserted into the pipe hole 22 because the insertion portion 15 at the distal end is bent inward. As shown in FIG.
After the lid 1 is pushed in until the bottom surface of the lid main body 2 comes into contact with the surface of the slab 21, the locking pieces 12 of the locking member 11 have an elastic force to expand in the radial direction. The part 14 is strongly pressed against the inner wall of the pipe hole 22 to be locked, and is held in the pipe hole 22 to prevent the lid 1 from being removed upward.

Thus, the pipe hole 22 of the slab 21
When the lid 1 is attached to the opening and the opening 23 is closed, the danger of the contractor tripping due to the pipe hole 22 being in an open state after the formation of the piping hole 22 and before the start of the piping work can be avoided. In particular, since the front side of the peripheral portion of the lid main body 2 is formed as an inclined surface, it is possible to avoid tripping at the corner of the lid 1 itself, and the danger prevention effect can be significantly enhanced. In addition, since the opening 23 is not closed by the lid 1 and does not trip, the contractor can perform the work with peace of mind.
In a site such as a large building or condominium where the number of piping holes 22 is large, the work is quickened.

Further, since the reinforcing ribs 7 are provided upright on the back surface of the lid main body 2 of the lid 1, it is possible to prevent the lid main body 2 from being dented and damaged even if a trader or the like rides. However, the reinforcing ribs 7 do not need to be provided if the mounting strength is sufficient even without the reinforcing ribs 7.

In the case of FIG. 4, the locking member 11 is attached to the four attachment portions 4 on the large diameter side of the lid 1 and attached to the pipe hole 22 having a large diameter. When it is desired to attach the lid 1 to the pipe hole 22 having a small hole diameter, the locking member 11 may be inserted into the attached portion 4 on the small diameter side instead of the large diameter side. Therefore, according to the lid 1, it is possible to cope with two types of pipe holes 22.

Further, although the mounting portion 4 is mounted at four locations, it can be mounted at only two opposing locations. In this case, the lid 1 can be attached even if the pipe hole 22 is formed eccentrically in an elliptical shape in concrete casting. Further, as shown in FIG. 8, the lid 1 can be provided with the mounting portions 4 at three places, and the locking member 11 can be mounted. That is, the attached portion 4 of the locking member 11 may be appropriately set in consideration of the hole diameter of the pipe hole 22, the locking force with the pipe hole 22, and the like.
In addition, the locking member 11 may be attached to the peripheral edge of the lid main body 2 from the side, and the attaching means is not limited.

Next, when the lid 1 is to be removed at the start of plumbing work or the like, the lid 1 can be removed by inserting a tool such as a screwdriver into a removal hole 8 provided on the surface of the lid body 2 and prying it.

It is to be noted that the removal hole 8 may be formed by cutting out a part of the peripheral portion, not the flat portion of the lid body 2, or
A magnet may be buried in the lid body 2 and may be removed by magnetic attraction, and any means may be used. Also, the removal hole 8
It is not necessary to provide a special device if it can be removed by, for example, prying a screwdriver into the peripheral portion of the lid body 2.

In this manner, after the lid 1 is removed, the lid 1 can be stored as it is, or the locking member 11 can be removed and stored separately and reused in the next construction. Therefore, once the lid 1 is manufactured, it can be reused any number of times thereafter, and can be used immediately in the piping hole 22. This is convenient, and it is not necessary to manufacture it every time the work is performed. it can.

In each of the above embodiments, the lid 1 has a plurality of locking members 11 removably attached to the back surface of the lid main body 2. However, the present invention is not limited to this.
The locking member 11 may be formed in a single annular body, or the lid body 2 and the locking member 11 may be integrally formed without being separated. However, the lid body 2 and the locking member 1
The storage space can be reduced if the device 1 is separated from the device. Further, when the locking member 11 is damaged by use, only the locking member 11 needs to be replaced, and the cost can be reduced.

[0028]

As described above, the cover of the slab piping hole according to the first aspect of the present invention is formed such that the front side of the peripheral edge portion is formed with an inclined surface having a thin end, and is detachably attached to the opening of the slab piping hole. It has a lid body to be attached, and an attaching portion for engaging with the inner wall of the pipe hole to attach the lid body.
Therefore, since the pipe hole is closed until the start of the piping work after the formation of the pipe hole of the slab, it is possible to easily and reliably avoid the danger of the contractor tripping on the pipe hole or the corner of the lid closing the pipe hole. In addition to this, the contractor and the like can carry out the construction with peace of mind, and in particular, the workability in the construction of buildings and condominiums having a large number of pipe holes can be significantly improved.

According to a second aspect of the present invention, there is provided a cover for a slab piping hole, wherein the mounting portion described in the first aspect is attached to the lid body as a detachable separate body. Therefore, it is particularly convenient for storage and its space can be reduced.

According to a third aspect of the present invention, in the lid of the slab piping hole, the mounting portion according to the second aspect comprises a plurality of locking members. Therefore, in particular, when a part of the mounting portion is broken, only a part thereof can be replaced.

According to a fourth aspect of the present invention, there is provided a cover for a slab piping hole according to the third aspect of the present invention, wherein the attachment portions of the locking member on the back surface of the lid main body are provided at a plurality of locations different in distance from the center. It is a thing. Therefore, in particular, one lid can be attached to a plurality of pipe holes having different inner diameters.

According to a fifth aspect of the present invention, in the slab piping hole lid, a pair of the mounting portions of the locking member on the back surface of the lid main body according to the fourth aspect are provided at least at opposing positions on the same center line. It was done. Therefore, in particular,
Even when the slab piping holes are eccentric in an elliptical shape or the like in concrete casting, the lid can be attached.

According to a sixth aspect of the present invention, the lid of the slab piping hole according to any one of the first to fifth aspects has a mounting strength such that a person can walk on the upper surface thereof. Things. Therefore, particularly, it is possible to reliably prevent the pedestrian from tripping.

According to a seventh aspect of the present invention, there is provided a cover for a slab piping hole, wherein a reinforcing rib is provided on the back surface of the lid body according to the sixth aspect. Therefore, the same effect as the sixth aspect is obtained.

According to an eighth aspect of the present invention, there is provided a cover for a slab piping hole, wherein the lid according to any one of the first to seventh aspects is provided with a removing portion for removing the slab piping hole from the slab piping hole. It is. Therefore, in particular, the lid attached to the pipe hole can be easily removed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a cover of a slab piping hole according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of FIG.

FIG. 3 is a perspective view showing a locking member of FIG. 2;

FIG. 4 is a rear view of the lid of FIG. 1;

FIG. 5 is a cross-sectional view of a main part showing a mounting portion of the locking member to the lid main body of FIG. 1;

FIG. 6 is a side view showing a state before the lid according to the embodiment of the present invention is attached to the pipe hole of the slab.

FIG. 7 is a side view showing a state after the lid of the embodiment of the present invention is attached to the pipe hole of the slab.

FIG. 8 is a rear view showing a lid according to another embodiment of the present invention.

FIG. 9 is a rear view showing a lid according to still another embodiment of the present invention.

FIG. 10 is a perspective view showing a conventional lid.

FIG. 11 is a perspective view showing another conventional lid.

FIG. 12 is a side view showing a state where the lid of FIG. 10 is attached to a piping hole of a slab.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lid 2 Lid main body 3 Inclined surface 4 Attached part 7 Reinforcement rib 8 Removal hole 11 Locking member 12 Locking piece 21 Slab 22 Piping hole 23 Opening

Claims (8)

[Claims] 1. A lid body formed on an inclined surface with a thin end at a front end of a peripheral portion and detachably attached to an opening of a piping hole of a slab, and the lid body engaged with an inner wall of the piping hole. A slab piping hole cover, comprising: 2. The slab piping hole lid according to claim 1, wherein the mounting portion is mounted on the lid body as a detachable separate body. 3. The slab piping hole cover according to claim 2, wherein the mounting portion includes a plurality of locking members. 4. The slab piping hole according to claim 3, wherein the attachment portions of the locking member on the back surface of the lid main body are provided at a plurality of positions having different distances from a center. lid. 5. The slab piping hole according to claim 4, wherein a pair of the mounting portions of the locking member on the back surface of the lid main body are provided at least at opposing positions on the same center line. lid. 6. The lid for a slab piping hole according to claim 1, wherein the lid main body has a mounting strength such that a person can walk on an upper surface thereof. 7. The lid for a slab piping hole according to claim 6, wherein a reinforcing rib is provided on a back surface of the lid body. 8. A cover for a slab piping hole according to claim 1, further comprising a removing portion for removing the slab piping hole from the slab piping hole.