JPS5852819Y2 - Conduit support for slab concrete pouring - Google Patents

Description

[Detailed description of the invention] This invention relates to a conduit support for placing in slab concrete, which is mainly installed in a state where it is erected on slab concrete, buried and fixed, and then connected to an outlet box for cable branching. In addition to maintaining the distance between pairs of conduit tubes when temporarily supporting them during burial, it also reliably prevents the intrusion of debris into the conduit tubes. This invention relates to a conduit support that can be used with any type of conduit.

Conventionally, when performing various types of wiring on a concrete slab during construction work on a concrete building, electrical conduits are erected on the slab concrete and temporarily supported, and then concrete material is poured into the concrete slab and the wiring is buried and fixed.

At this time, in order to ensure reliable communication with the outlet box used for branching the cables, the distance between the conduit tubes to be erected is determined by a standardized conduit communication hole buttoned on one side wall of the outlet box. (knockout hole)
It is necessary to correspond to the mutual spacing, and therefore various holding means have been proposed.

One of them is disclosed in Japanese Utility Model Publication No. 50-29753, in which a conduit is clamped and screwed by a pipe holding plate having a pair of chevron-shaped grooves into which the conduit is fitted, and a rectangular mounting board. The screw-fastening work was troublesome, and since the conduit opening was left open, there was a risk of intrusion.

In addition, the conduit is held by a pair of clamping plates that are connected to each other and have mountain-shaped recesses that hold the conduit.
Some clamping plates have connecting parts on both sides to connect them in the adjacent direction when they are placed adjacent to each other, but this needs to be prepared separately if the diameter of the conduit differs, and it is also necessary to prevent the intrusion of dirt. It lacked effective means.

Therefore, this idea was devised in view of the points mentioned above, and a. , a support is formed that is large enough to straddle a pair of electrical conduits of the same diameter or different diameters that are exposed in parallel on a concrete slab, and a pair of supports with an annular cross section are attached to the bottom of the support. The grooves are arranged in a concave manner, and the outer circumferential inner edge surface of each support groove is in contact with the standardized outer circumferential surface of the large diameter conduit tube, and the inner circumferential outer edge surface of each support groove is in contact with the standardized inner circumferential surface of the small diameter conduit tube. By forming the conduit so that it abuts against the surface, it is possible to maintain the distance between the conduit tubes supported by the stand and to prevent the intrusion of the concrete material being poured. Moreover, it is possible to make various combinations of conduit tubes with different diameters. It is designed to be compatible with the following.

Hereinafter, embodiments of this invention will be described with reference to the drawings.

Reference numeral 1 shown in the figure is a support integrally formed of polypropylene resin or other hard synthetic resin,
A pair of standardized conduit communication holes (knockout holes) N are placed on one side wall W of an outlet box B used for cable branch wiring, and a stand is placed on the slab concrete C in accordance with the mutual spacing. parallel 1 exposed
It has a size that extends over the pair of electrical conduits P1 and P2.

In particular, this type of outlet box B has a conduit communication hole N provided in one side wall W thereof.
Conduit P1, P2 having an outer diameter of 19 or 25
For communication purposes, their mutual spacing is standardized as 44 mm between their center points, and 1
The size combination of the pair of conduit connecting holes N is 1 gmrn
-1grItm, 19mm-25mm, 25myi
- There are three types for 25mm.

The ends of a pair of conduit pipes P1 and P2 of the same diameter or different diameters buried in the slab concrete IJ-)C are made into erected legs so as to communicate with the conduit communication hole N provided in this way. To expose on slab conch IJ-)C,
Even if the diameters of the conduits P1 and P2 are different, the distance between them must be <44111 m as described above.

Correspondingly, on the bottom surface of the support 1, there is provided a ring with an annular cross section.
The pair of support grooves 2 have a spacing of 44 mm between their center points.
They are arranged in a concave manner.

The outer circumferential inner edge surface 3A of each of the support grooves 2 is in contact with the outer circumferential surface of the larger diameter Pl of the standardized electric conduit, and the inner circumferential outer edge surface 3B of each of the support grooves 2 is in contact with the outer circumferential surface of the standardized electric conduit Pl. It is formed so as to come into contact with the inner circumferential surface of the smaller diameter pipe P2.

That is, as shown in FIGS. 2 and 3, the support groove 2 is located inside a bottomed circular hole having an inner diameter that approximately matches the outer diameter of the large-diameter electrical conduit P1, and has a diameter that approximately matches the inner diameter of the small-diameter electrical conduit P1. By erecting columnar parts 4 having matching outer diameters, the space can be obtained.

At this time, even though the pair of conduit pipes P1 and P2 have the same diameter,
Although they have different diameters, the mutual spacing is exactly the same, so the centers of the large circular portion formed by the outer peripheral inner edge surface 3A and the small circular portion formed by the inner peripheral outer edge surface 3B are on a line perpendicular to the arrangement direction of the support grooves 2. positioned.

In addition, in particular, the small diameter conduit P2 and the large diameter conduit P1
In order that the small-diameter conduit P2 combined with the other conduit always maintains the above-mentioned holding interval constant, the column part 4 is attached to one side of the same side in the arrangement direction of the support grooves 2, The position is eccentric to the large circular part.

When eccentric in this way, the outer circumferential inner edge surface 3 becomes narrower.
A and the inner circumferential outer edge surface 3B have a gap between the conduit P1. It goes without saying that the tube thickness should not be smaller than that of P2, and by making it approximately the same, it is possible to further improve the installation stability when installing the conduit tubes P1 and P2.

Reference numeral 5 denotes guide tapered edges cut and formed at the open end of the outer inner edge surface 3A and the open end of the inner outer edge surface 3B, respectively, and the conduit P1
, P2 to facilitate insertion.

Further, the support body 1 itself has support grooves 2 recessed therein and conduit pipes P1. Since it essentially functions to maintain P2, the outside of the support 1 in the arrangement direction of the support grooves 2 and the outside of the center of the support 1 between the support grooves 2 are made as small as possible.
It is preferable to economize on the forming material by making the outer contour approximately 8-shaped when viewed from above, and if necessary, a gap may be provided between the supporting grooves 2.

Reference numeral 6 in the figure is a knob formed to protrude sideways at the bottom of the support groove 2 on the outside of the center of the support 1, and
, P2 to facilitate attachment and detachment.

In FIGS. 6 and 7, when multiple pairs or multiple conduit pipes P1 and P2 are erected on slab concrete (C) and connected to a plurality of outlet boxes B, the conduit pipes P1 and P2 are arranged so as to be suitable for adjacent arrangement. This figure shows an example in which a connecting means is formed in the figure.

This has a connecting protrusion 7 protruding from one side of the outer side of the support 1 in the direction in which the support grooves 2 are arranged, and a concave connecting groove 8 recessed on the other side, which is removably fitted to the connecting protrusion 7. So, the connecting protrusion 7,
When the connecting grooves 8 are connected to each other, they are shaped so that they do not easily separate in the connecting direction.

Therefore, the connecting protrusions 7 are formed to have a mushroom shape in cross section as shown, and a substantially dovetail groove shape in cross section (not shown), with a narrow base and a wide tip. The support body 1 has a shape corresponding to that of the support body 1, and is formed long along the vertical direction of the support body 1, so that when they are arranged adjacent to each other, they can be freely attached and detached by sliding in the vertical direction.

By doing this, when connecting multiple outlet boxes B with multiple conduits P1 and P2 in parallel,
A plurality of electrical conduits Pi and P2 can be exposed on the slab concrete C with their mutual spacing kept constant, and any number of electrical conduits P1 and P2 can be used depending on the number of electrical conduits P1 and P2.

This invention is constructed as described above, and when it is used, during slab construction, the electrical conduits P1. The end of P2 is raised up corresponding to the position of the outlet pock 2B to be connected, and the support body 1 is attached to the conduit pipes P1 and P2 in the support grooves 2 so as to cover the openings of the conduit pipes P1 and P2. Yes (see Figures 4 and 7).

Therefore, when constructing the slab concrete C, the electrical conduits P1 and P2 of the same or different diameters are temporarily supported in the form of standing legs,
It is possible to securely connect the openings with the openings closed and maintain a constant distance between them, and it also prevents wobbling or wobbling due to the pouring of concrete material after the connection. In addition, there is no risk of its intrusion, and it does not interfere with the subsequent cable routing work into the conduit pipes P1 and P2. It is extremely convenient as it can accommodate various combinations of electrical conduits Pi and P2 of different diameters.

That is, this means that the support 1 is connected to the slab concrete C in accordance with the distance between the standardized l pairs of conduit communication holes N toward one side wall W of the outlet box B.
This is because it is large enough to straddle a pair of electrical conduits P1 and P2 of the same diameter or different diameter that are parallel to each other and are exposed on the top, and furthermore, it has an annular cross-sectional shape recessed in the bottom surface of the support 1. This is because the one pair of support grooves 2 are firmly attached to the respective openings of the electrical conduits P1 and P2, thereby maintaining the distance between the electrical conduits P1 and P2 and ensuring reliable closing of the electrical conduits P1 and P2.

Further, the inner peripheral surface 3A of each of the support grooves 2 supports the large diameter electric conduit P1 from the outside by coming into contact with the outer peripheral surface of the standardized large diameter electric conduit P1. The inner peripheral outer edge surface 3B supports the small diameter electrical conduit P2 from inside by coming into contact with the standardized inner peripheral surface of the small diameter electrical conduit P2. No matter which small diameter conduit Pi, P2 is lined up, this Pi, P2
It is highly versatile and can be easily handled on site since there is no need to separately manufacture and prepare it for different diameters as in the past.

In addition, the supporting grooves 2 are structured so that they can be attached to large and small diameter conduits P1 and P2, so that the combination of the conduits P1 and P2 that are standing is 19. Tomo-1911!71,19yama-251m, 25m
m-25mm, it can be installed even if the left and right sides are reversed, and it is also possible to simply attach the conduit P1. Coupled with the fact that it is sufficient to forcefully install it by fitting it from the P2 opening, it also ensures quick work on site.
After the concrete material solidifies, it can be removed and reused, so there is no waste.

As explained above, according to this invention, a pair of electrical conduit pipes connected to an outlet box while standing on a concrete slab can be firmly spaced from each other when temporarily supported during concrete pouring. In addition, it can be used with any combination of two types of standardized electrical conduits of different sizes and diameters by blocking the opening and reliably preventing the intrusion of conduit. (Since it only needs to be installed so that it is in a mated state with the conduit, the installation and removal work can be done quickly, and it has excellent workability on site. In addition, it has a simple structure and is available at low cost.) This has extremely beneficial effects in practical terms.

[Brief explanation of drawings]

The drawings show an embodiment of the invention, in which Fig. 1 is a partially cutaway perspective view, Fig. 2 is a vertical sectional view, Fig. 3 is a bottom view, and Fig. 4 is a partially omitted front view in use. Fig. 5 is a partially omitted front view of the conduit connected to the outlet box, Fig. 6 is a perspective view of the connecting means formed when they are placed adjacent to each other, and Fig. 7 is its use. It is a partially omitted front view of the state. B... Outlet box, C... Slab concrete, N... Conduit communication hole, Pl... Large diameter conduit, P2... Small diameter conduit, W... Side wall, n.・・・
Mutual spacing, 1... Support body, 2... Support groove, 3A.
... Outer circumference inner edge surface, 3Bl... Inner circumference outer edge surface, 4... Column body part, 511. Guide tapered edge, 6... knob, 7...
・Connection protrusion, 8...Connection groove.

Claims (1)

[Scope of utility model registration request] 1. Corresponding to the distance between a standardized pair of conduit communication holes in one side wall of the outlet box, parallel conduit of the same diameter or different diameters is installed on the concrete slab. A support body having a size that spans over the wire is formed, and l pairs of support grooves each having an annular cross section are recessed and arranged in the bottom surface of the support body, and the outer peripheral inner edge surface of each of the support grooves is formed with the standardized large diameter electric wire. 1. A conduit support for placing slab concrete, characterized in that the support groove is formed so as to be in contact with the outer peripheral surface of the pipe, and the inner peripheral surface of each support groove is in contact with the inner peripheral surface of the standardized small diameter conduit. 2. Scope of Utility Model Registration Claim No. 1, in which a connecting protrusion is provided on one side of the outer side of the support in the direction in which the support grooves are arranged, and a connecting concave line is provided on the other side to be detachably fitted to the connecting protrusion. The conduit support for slab concrete placement as described in item 1.