JPH069324U - Pipe protection cover for conduit - Google Patents

Abstract

(57) [Summary] [Purpose] A conduit pipe improved so that when the temporary formwork is removed, the nail fixing the conduit pipe protection cover to the temporary formwork separates from the conduit form protection cover together with the temporary formwork. Provide a protective cover. [Constitution] The conduit protective cover 10 for the conduit is a temporary formwork 1
6, a main body 12 arranged in contact with 6 and a nail mounting portion 14 integrally formed with the main body for fixing the conduit protection cover to the temporary formwork with the nail 20.
The attachment portions are provided on opposite sides of a peripheral edge portion 30 extending around the main body of the conduit tube pipe protective cover, and a V-shaped groove 32 is engraved on the upper surface of the peripheral edge portion around the attachment portion. ing. When the temporary formwork is removed, the mounting portion is broken by the groove from the main body of the conduit pipe protection cover and separated from the conduit form protection cover together with the temporary formwork.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The conduit protective cover for a conduit according to the present invention is temporarily fixed to a temporary formwork with a fixture, such as a nail, and then embedded in a solidifying molding material such as concrete, and then the temporary formwork is removed, The present invention relates to a conduit protection cover for an electric wire, in which the inside of the conduit protection cover for an electric conduit is exposed to the front.

[0002]

[Prior art]

 The conduit protection cover is a type of box for installing conduits in structures such as concrete. The front of the conduit protection cover body is flush with the ceiling or wall of the building. The inner part of the main body is exposed to the front, and the rear part of the main body is buried in the concrete that constitutes the ceiling or wall surface. In general, the conduit protection cover for a conduit is provided with two mounting portions 14, 14 integrally formed with the main body 12 as shown in FIG. 1, and the temporary formwork 16 has a conduit protection cover for a conduit. 2A, the nail 20 is inserted into the nail hole 18 of the mounting portion 14 and the nail 20 is struck on the temporary form 16 to attach the conduit pipe protective cover to the temporary form. It is fixed at 16.

For example, in order to perform electric wiring on a ceiling, floor, wall, etc. of a concrete structure, a temporary formwork 16 for concrete casting is assembled into a predetermined shape, and a conduit pipe protection cover is installed at a desired location. Are attached as described above, and then the required conduit 22 is connected to the conduit protection cover for conduit, and then the ceiling material 24 or wall material 24 such as concrete is placed. After the cast concrete is solidified, when the temporary formwork 16 is removed from the ceiling, floor, wall, etc. formed by the concrete 24, the rear part of the main body is buried in the concrete 24 forming the ceiling or wall surface. The front surface of the main body 12 is flush with the ceiling or wall surface of the building so that the interior 28 of the main body 12 is exposed indoors. Then, a predetermined electric wire, cable or the like is passed through the installed conduit protective cover for the conduit into the conduit to carry out electrical wiring.

[0004]

[Problems to be solved by the device]

 In the conventional conduit protective cover for conduit, when the temporary form 16 is removed, the nail 20 that fixes the conduit protective cover for conduit to the temporary form 16 is pulled out from the temporary form 16 together with the conduit protective cover for conduit. It was left on the mounting portion 14 of the conduit protection cover for the conduit. If the nails are left as they are on the installation part of the conduit protection cover for conduits, it will interfere with the passage of the wires or the subsequent work such as finishing the ceiling surface and wall surfaces, and further rust will spoil the appearance. Not only that, it causes various troubles, so it was necessary to bend or cut the nail inside the conduit protective cover for the conduit and apply anti-rust paint. Moreover, since the conduit protective cover for a conduit is generally installed at a high place such as a ceiling or a wall of a building that needs to be accessed by using a ladder or a stepladder, it is not necessary to bend or remove the nails. It took manpower and time.

In view of the above problems, an object of the present invention is to provide a conduit pipe protection cover improved so that no nail remains on the conduit pipe protection cover when the temporary formwork is removed. is there.

[0006]

[Means for Solving the Problems]

 The inventor of the present invention has found that the nail itself is not required for the function of the conduit pipe protective cover, so when removing the temporary formwork, the nail should be removed from the conduit pipe protective cover together with the temporary formwork. The present invention has been devised, focusing on the achievement of such an object. Therefore, in order to achieve the above-mentioned object, a conduit protection cover for a conduit according to the present invention comprises a main body arranged in contact with a temporary formwork, a body integrally formed with the main body, and a fixture for the temporary formwork. In the conduit tube pipe protective cover, which is equipped with a mounting part that is fixed in place and is embedded in the solidified molding material placed in the area defined by the temporary formwork, a relatively deep groove is It is engraved along the mounting part on the surface of the connecting part that connects with the mounting part.When the temporary formwork is removed, the mounting part is broken from the main body by the groove and separated from the temporary formwork. It is characterized by that.

In the conduit pipe protective cover according to the present invention, the groove formed between the main body and the mounting portion is formed by the mounting portion from the main body of the conduit pipe protective cover when the temporary formwork is removed. There is no particular restriction on the shape and size as long as the groove is deep enough to break, and the groove may be V-shaped, U-shaped, or semicircular, and the groove is the connecting portion on the side that contacts the temporary formwork. Surface may be provided on the surface of the connecting portion on the opposite side, or on both surfaces of the connecting portion. The shape, the material, and the shape of the mounting portion of the conduit protection cover itself for the conduit are the same as the conventional ones, and are not particularly peculiar to the present invention. Further, when the conduit protective cover for the conduit according to the present invention is attached to the temporary formwork, the fixture used is not particularly limited and need not be limited to nails. The conduit pipe protective cover according to the present invention can be manufactured by a conventional method, for example, when the material is synthetic resin, by an injection molding method, and when the conduit pipe protective cover is formed, the conduit pipe conduit cover is formed. From the viewpoint of production efficiency, it is desirable to form the groove at the same time when the protective cover body and the mounting portion are formed.

[0008]

[Action]

 The main body of the conduit protection cover for the conduit is embedded in a solidifying molding material such as concrete, while the mounting part is fixed to the temporary formwork via a fixture, such as a nail. When removed from concrete on the ceiling or wall, tensile stress concentrates in the groove between the main body of the pipe protective cover for the electric wire and the mounting portion, and first a crack is formed in a part of the groove, for example, the groove bottom with the thinnest wall. The crevice grows almost along the groove, and the mounting portion is separated from the main body together with the temporary formwork as shown in FIG. 2B, and only the main body remains behind. Therefore, as is the case with the conventional method, after removing the temporary formwork, removing the nails and bending the nails do not interfere with the subsequent work such as passing wires. The required work becomes unnecessary. The groove is preferably a V-shaped groove with a notch at the bottom of the groove so that the mounting portion can be easily separated. This is because the notch portion is likely to be cracked due to concentrated stress, the crack grows, and the mounting portion is easily separated from the main body of the conduit protective cover.

[0009]

【Example】

 Hereinafter, the present invention will be described in more detail based on embodiments with reference to the accompanying drawings. FIG. 1 is a plan view of a tenth embodiment of a conduit pipe protective cover (hereinafter simply referred to as a protective cover) according to the present invention (viewed from a side opposite to a front face in contact with a temporary formwork). 2 (a) and 2 (b) are partial cross-sectional side views of the protective cover 10, showing a state in which the protective cover 10 is embedded in concrete while being attached to the temporary formwork and a state in which the temporary formwork is being removed, respectively. Shows. 3 (a) and 3 (b) are respectively a partially enlarged plan view of the mounting portion and a side sectional view as seen from the arrow XX of FIG. 3 (a). The protective cover 10 according to the present embodiment basically includes a box main body 12 having a specific shape in which the tip of a bullet is cut in half along a plane including the longitudinal centerline, and a peripheral edge of the main body 12. A peripheral edge portion 30 that slightly extends in a direction orthogonal to the longitudinal direction to form a contact surface with the temporary mold 16, and two mounting portions 14 and 14 provided on the opposing peripheral edge portions 30. , And a groove 32 engraved on the upper surface of the peripheral edge portion 30 around the mounting portion 14.

As shown in FIGS. 3A and 3B, the mounting portion 14 is formed in a substantially hollow frustoconical shape, and is integrally formed with the peripheral edge portion 30 at the lower end of the conical skirt 31 for almost half a circumference. The other half is projected outward in the extension direction of the peripheral edge portion 30, and the lower surface of the attachment portion 14 is in contact with the surface 26 of the temporary formwork 16. The mounting portion 14 has a nail hole 18 having a diameter smaller than the head portion of the nail 20 at the center of the upper surface thereof, and the nail 20 is penetrated through the nail hole 18 and struck on the temporary formwork 16 to protect the cover 10. Can be fixed to the temporary formwork 16. A V-shaped groove 32 is engraved along the line where the lower end of the skirt 31 of the mounting portion 14 and the peripheral edge portion 30 are in contact, over substantially the entire length thereof. The depth of the groove 32 is so deep as to leave a slight thickness between it and the lower surface of the peripheral portion 30, and the mounting portion 14 is integrally joined to the peripheral portion 30 by the slight remaining portion of the thickness. Has been done. In other words, the peripheral edge 30 engraves the groove 32 leaving only the thickness necessary to bond and retain the mounting portion 14. This is because, when the temporary form 16 is removed as shown in FIG. 2B, excessive tensile stress does not act on the main body 12 of the protective cover 10 via the mounting portion 14.

In the present embodiment in which polyethylene is used as the material for the conduit protective cover 10, the thickness of the peripheral portion 30 is about 2 mm and the depth of the groove 32 is about 1.5 mm. The conduit protective cover 10 for the conduit of this embodiment was attached to the temporary form 16, the concrete was placed, and after the predetermined solidification time had elapsed, the temporary form 16 was removed. As shown, the attachment portion 14 of the conduit protective cover 10 is separated from the main body 12 along the groove 32, and the nail 20 is removed together with the temporary form frame 16 until it is struck to the temporary form frame 16. I was able to confirm that

In the present embodiment, the groove 32 is formed as a continuous groove having a V-shaped cross section. However, as long as the mounting portion 14 can be broken from the main body 12 along the groove 32, it is U-shaped or semicircular. However, it does not have to be a continuous groove over the entire length between the mounting portion and the peripheral portion. Further, in this embodiment, the groove 32 is formed on the upper surface of the peripheral edge portion 30, but it may be provided on the lower surface of the peripheral edge portion 30 or may be provided so as to face the upper surface and the lower surface.

[0013]

[Effect of device]

 The conduit protection cover for conduit according to the present invention has a groove formed between the main body of the conduit protection cover for the conduit and the mounting portion. When removing the temporary formwork, the mounting part is protected by the groove. Since it is designed to be broken from the main body of the, the fixing tool such as nails does not remain on the conduit pipe protective cover when the temporary formwork is removed. Since the conduit pipe protective cover according to the present invention does not need to remove or fold the fixing tool such as the nail fixing the conduit pipe protective cover to the temporary mold after removing the temporary formwork. Contributes to labor saving in conduit work.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of a conduit protective cover for a conduit according to the present invention attached to a temporary formwork.

2 (a) and 2 (b) are partial side cross-sectional views of the conduit tube pipe protective cover of FIG. 1, showing a state in which the temporary form is attached and a state in which the temporary form is removed, respectively. Indicates.

3 (a) and 3 (b) are an enlarged plan view and an enlarged side cross-sectional view of a mounting portion of the conduit tube pipe protective cover of FIG. 1, respectively.

[Explanation of symbols]

 10 One embodiment of a conduit protection cover for conduit according to the present invention 12 Main body 14 Mounting part 16 Temporary formwork 18 Nail hole 20 Nail 22 Conduit tube 24 Placed concrete 26 Surface of temporary formwork 28 Main body of conduit protection cover for conduit Internal 30 Perimeter 32 Groove

Claims (1)

[Scope of utility model registration request] 1. A temporary mold, comprising: a main body arranged in contact with the temporary formwork; and a mounting portion integrally formed with the main body and fixed to the temporary formwork by a fixture. In the conduit protective cover for the conduit, which is designed to be embedded in the solidified molding material cast in the defined area, a relatively deep groove,
It is engraved along the mounting part on the surface of the connecting part that connects the main body and the mounting part, and when the temporary formwork is removed, the mounting part breaks from the main body due to the groove and together with the temporary formwork. A conduit protective cover for conduit that is designed to be detached.