JPH05311680A - Wiring pit ditch and its construction method - Google Patents

Abstract

PURPOSE:To simplify the structure of a branch point closing cover by providing a corner-cut cavity communicated and opened to both a main pit ditch and a branch pit ditch at the lower position of the cover receiving frame fixing section of the ditch branch corner section of a concrete floor. CONSTITUTION:A wood frame 5 is assembled at the construction position of a main pit ditch 1 and a branch pit ditch 2 on the slab face 8a of skeleton concrete, and a main ditch formwork panel 11a forming the inner wall face of the ditch 1 and a branch ditch formwork panel 12a forming the inner wall face of the ditch 2 are fitted to the wood frame 5. A triangular hood type corner-cut formwork 17 is fitted to outside corner sections of the panels 11a, 12a in contact with the panel faces and the slab face 8a. A main ditch cover receiving frame 1a and a branch ditch receiving frame 2a are positioned and fitted at the upper outside positions of the panels 11a, 12a via a spacer member 9. Slab thickening concrete 10a is placed at the formwork outside portion where the formwork 17 and the receiving frames 1a, 2a are buried to form wiring pit ditches 1, 2 having a corner-cut cavity 7, and the structure and shape of a branch point closing cover 13 are simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a wiring pit groove provided with a corner cut at a branch corner portion of a main pit groove and a branch pit groove, and a method of constructing the wiring pit groove.

[0002]

2. Description of the Related Art Conventionally, a concrete floor 10 such as a basement has a main pit groove 1 for laying a wiring and a branch pit groove 2 branched at a right angle from the main pit groove 1 as shown in FIG.
Main pit groove 1 and branch pit groove 2 of the concrete floor 10
The main pit groove 1 is provided with a corner cut 3 for bending the pit groove laying wiring into a rounded shape at the branching corner with
A lid receiving frame 1 for supporting the groove closing lids 11 and 12 and the branch point closing lid 13 on both side edges of the opening including the corner cut 3 of the branch pit groove 2.
A branch type wiring pit groove as shown in FIGS. 6 and 7 in which a, 2a and 3a are fixed is known.

In this conventional wiring pit groove, the wooden frames 4, 5 and 6 are assembled at the construction positions of the main pit groove 1 and the branch pit groove 2 on the slab surface 8a of the building concrete as shown in FIG. , 5, 6 define a main groove form panel 11a defining the inner wall surface of the main pit groove 1, a branch groove form panel 12 defining the inner wall surface of the branch pit groove 2, and an inner wall surface of the corner cut 3. Formwork assembly work for mounting the corner cutting formwork panel 13a,
After performing a receiving frame mounting work for attaching the lid receiving frames 1a, 2a, 3a to the upper outer positions of the form panel 11a, 12a, 13a, concrete for slab thickening is applied to the outside of the form on the slab surface 8a. Predetermined level (lid receiving frame 1a,
It is constructed by a method of pouring up to the height position of 2a, 3a) and removing the mold after hardening of the cast concrete.

[0004]

In the conventional wiring pit groove, the corner cut 3 provided at the groove branching corner portion of the concrete floor 10 opens at the groove upper surface at a predetermined angle, for example, the plane 45.
Since it is formed as a vertical inclined surface of the main pit groove 1 and the branch pit groove 2, in addition to the lid receiving frames 1a, 2a of the main pit groove 1 and the branch pit groove 2, a lid receiving frame 3a for connecting the lid receiving frames 1a, 2a at the corner cut 3 is provided. It is necessary, and the branch point closing lid 13 must be formed as a corner cutting lid having a complicated shape corresponding to the shape of the corner cut 3, and the branch point closing lid 13 (corner cutting lid) is a branch point opening portion. There were a lot of problems that it didn't meet.

On the other hand, according to the conventional wiring pit groove construction method, the formwork panels 11a, 12a and the panel 11 for defining the inner wall surfaces of the main pit groove 1 and the branch pit groove 2 are formed.
In addition to the wooden frames 4 and 5 for mounting a and 12a, a corner cutting form panel 13 as shown in FIG. 7 which defines the inner wall surface of the corner cutting 3.
Since a and the wooden frame 6 for mounting the panel are required, there is a problem that the work for mounting the formwork is troublesome.

The present invention has been made to solve the above-mentioned conventional problems. A first object of the present invention is to provide a corner cut in a groove branching corner portion of a concrete floor through which a pit groove laying wiring is curved in a round shape. However, the structure and shape of the lid receiving frame and the branch point closing lid can be simplified to reduce the cost, and the problem of the branch point closing lid not fitting the branch point opening can be solved. To do. A second object of the present invention is to provide a wiring pit groove construction method capable of shortening the time required for mounting the formwork and constructing the wiring pit groove with good workability.

[0007]

In order to achieve the first object, the wiring pit groove of the present invention is a main pit groove 1 for wiring and a main pit for wiring laying formed in a concrete floor 10 such as a basement. There is a branch pit groove 2 branched from the groove 1, and lid receiving frames 1a and 2a for supporting the groove closing lids 11 and 12 and the branch point closing lid 13 are provided at both side edges of the openings of the main pit groove 1 and the branch pit groove 2. In the fixed one, a corner cutting cavity 7 communicating with both the main pit groove 1 and the branch pit groove 2 is provided at a position below the lid receiving frame fixing portion in the groove branching corner portion of the concrete floor 10, The pit groove wiring W is curved in a rounded shape as shown in FIG.

The corner-cutting cavity 7 may be formed by a triangular eaves-shaped corner-cutting mold 17 which is embedded and fixed in the concrete floor 10 at the position of the groove branching corner, or the corner-cutting mold 17 is removed and removed. It is also possible to form it as a mold release cavity,
In order to increase the strength of the concrete in the upper part of the cavity, it is desirable to form the corner-cutting cavity 7 by a corner-cutting mold 17 embedded and fixed in the concrete floor 10.

In order to achieve the second object, the method of constructing a wiring pit groove according to the present invention is such that the main pit groove 1 and the branch pit groove 2 are provided on the slab surface 8a of the skeleton concrete 8 at the construction positions. , 5 are assembled, a main groove form panel 11a defining the inner wall surface of the main pit groove 1 and a branch groove form panel 12a defining the inner wall surface of the branch pit groove 2 are attached to the wooden frames 4 and 5, and Groove form panel 11a and branch groove form panel 1
Forming work for attaching a triangular eaves-shaped corner cutting form 17 to the panel surface and the slab surface 8a and fixing them to the outer corners of 2a, and the main groove form panel 11a and the branch groove form. Panel 1
The main groove lid receiving frame 1a and the branch groove lid receiving frame 2a are located outside the upper portion of 2a.
After carrying out the work of mounting the receiving frame, which is positioned and mounted with the spacer member 9 as shown in FIG. 5, the corner cutting frame 17 and the lid receiving frames 1a, 2a on the slab surface 8a are added to the outside of the frame. It is characterized in that the concrete for thickness 10a is cast to a predetermined level, and after the cast concrete 10a is cured, the mold is removed to form a wiring pit groove having the corner cut cavity 7.

[0010]

According to the wiring pit groove of the present invention having the above-mentioned corner cut cavity 7, the lid receiving frame 1a of the main pit groove 1 and the lid receiving frame 2a of the branch pit groove 2 are connected at the corner cutting position as shown in FIGS. 7
Since the conventional lid receiving frame 3a shown in FIG. 1 is unnecessary, the structure and shape of the lid receiving frames 1a and 2a and the branch point closing lid 13 can be simplified to reduce the cost. Since the shape of is only rectangular, it is possible to solve the conventional problem that the lid 13 does not fit into the branch point opening.

Further, according to the above-described method for constructing the wiring pit groove of the present invention, the corner cutting form panel 13a and the wooden frame 6 for mounting the panel as shown in FIG. The work time can be shortened, and the wiring pit groove can be constructed with good workability.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a wiring pit groove according to an embodiment of the present invention will be described below with reference to FIGS.

The wiring pit groove of this embodiment has a main pit groove 1 for wiring laying formed in a concrete floor 10 such as a basement and a branch pit groove 2 branched from the main pit groove 1 at a right angle. The lid receiving frames 1a and 2a having the cross-sectional shape as shown in FIG. 2 for supporting the groove closing lids 11 and 12 and the branch point closing lid 13 on both side edges of the opening of the main pit groove 1 and the branch pit groove 2 are joined at the groove branching corner portions. The main pit groove 1 and the branch pit groove 2 are fixed in the state and below the lid receiving frame fixed portion in the groove branching corner portion of the concrete floor 10.
A corner cut-out cavity 7 is provided so as to communicate with both of them, and the pit groove wiring W can be curved and passed in the corner cut-out cavity 7 as shown in FIG.

The corner cutting cavity 7 is formed by a triangular eaves type corner cutting formwork 17 which is embedded and fixed in the concrete floor 10 at the corner of the groove branching. Reinforcing reinforcing bars (not shown) bent into a U shape in a plane are embedded.

The corner cutting frame 17 is made of a synthetic resin, a steel plate, etc., and as shown in FIG. 3, it is slanted obliquely upward and is reinforced by a plurality of ribs 19a on the corner cutting plate 18. A right-angled triangular eaves plate 19 is provided, and a plurality of nailing holes 20a are provided in the eaves plate 19 and the edge flanges 20 of the corner cutting plate 18. Next, a method of constructing the wiring pit groove having the above structure will be described with reference to FIGS.

This wiring pit groove is constructed by assembling and fixing the wooden frames 4 and 5 at the construction positions of the main pit groove 1 and the branch pit groove 2 on the slab surface 8a of the building concrete 8. A main groove form panel 11a defining the inner wall surface of the main pit groove 1 and a branch groove form panel 12a defining the inner wall surface of the branch pit groove 2 are attached to the main groove 5, and the main groove form panel 11a and the branch groove form are attached. Forming work in which a triangular eaves-shaped corner cutting form 17 is abutted on the panel surface and the slab surface 8a by flanges at the outer corners of the panel 12a and fixed by nailing, and the main groove form panel 11a and the branch are formed. Angle pieces 24 are fixed at intervals on the upper outside position of the groove form panel 12a by nailing,
The main groove lid receiving frame 1a and the branch groove lid receiving frame 2a are positioned and mounted on the angle piece 24 by the spacer member 9 as shown in FIG. 5, and the anchors 21 and 22 of the respective lid receiving frames 1a and 2a are fixed to the differential line 23. Install the receiving frame.

The corner cutting mold 1 on the slab surface 8a
7 and the concrete 10a for increasing the thickness of the slab are cast to a predetermined level (the height position of the lid receiving frames 1a, 2a) on the outer side of the form in which the lid receiving frames 1a, 2a are embedded, and the cast concrete 10a After curing, the spacer member 9 and the wooden frames 4 and 5 and the form panel 11a and 12a are removed to remove the mold, and the lid receiving frames 1a and 2a are fixed to the groove opening edge portion and the corner cutting form 17 and the angle. A wiring pit groove as shown in FIGS. 1 to 3 in which the piece 24 is embedded in the cast concrete 10a (concrete floor 10) is formed.

The corner-cutting mold 1 is used when the mold is removed.
By removing 7 from the cast concrete 10a, the corner-cutting cavity 7 can be formed by the release space of the corner-cutting mold 17.

[0019]

Since the wiring pit groove of the present invention has the above-described corner cut cavity 7, the lid receiving frame 1a of the main pit groove 1 and the lid receiving frame 2a of the branch pit groove 2 are placed at the corner cutting positions. Since the conventional lid receiving frame 3a shown in FIGS. 6 and 7 for connection is unnecessary, the structure and shape of the lid receiving frames 1a and 2a and the branch point closing lid 13 can be simplified to reduce the cost. Further, since the branch point closing lid 13 has only a rectangular shape, the conventional problem that the lid 13 does not fit in the branch point opening can be solved. Also,
According to the method for constructing the wiring pit groove of the present invention described above, the corner cutting form panel 13a and the wooden frame 6 for mounting the panel as shown in FIG. Thus, the wiring pit groove can be constructed with good workability.

[Brief description of drawings]

FIG. 1 is a plan view of a main part of a wiring pit groove according to an embodiment of the present invention.

FIG. 2 is a sectional view of an essential part of the wiring pit groove.

FIG. 3 is a perspective view of an essential part showing a portion in which a corner cutting frame of the wiring pit groove is embedded.

FIG. 4 is a plan view of an essential part showing a method of constructing a wiring pit groove according to an embodiment of the present invention.

5 is a cross-sectional view of a main part of FIG.

FIG. 6 is a perspective view showing a conventional wiring pit groove in relation to a groove closing lid and a branch point closing lid.

FIG. 7 is a plan view of a main part showing a conventional method of constructing a wiring pit groove.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main pit groove, 2 ... Branch pit groove, 1a, 2a ... Lid receiving frame, W ... Pit groove laying wiring, 4, 5 ... Wooden frame, 7 ... Corner cut cavity, 8 ... Frame concrete, 8a ... Frame concrete slab Surface, 9 ... Spacer member, 10 ... Concrete floor,
10a ... Casting concrete, 11, 12 ... Groove closing lid, 1
1a ... Main groove form panel, 12a ... Branch groove form panel, 17
… Corner cutting formwork 21, 22… Anchor, 23… Differential line, 24
… Angle piece.

Claims (3)

[Claims] 1. A main pit groove for wiring laying formed in a concrete floor such as an underground room, and a branch pit groove branched from the main pit groove, and both side edges of openings of the main pit groove and the branch pit groove. In the wiring pit groove in which the lid receiving frame for supporting the groove closing lid and the branch point closing lid is fixed, the main pit groove and the branch pit groove are provided below the lid receiving frame fixing portion in the groove branching corner portion of the concrete floor. A wiring pit groove, characterized in that a corner-cutting cavity communicating with both is provided, and the pit groove-laying wiring can be curved in a rounded shape and passed through the corner-cutting cavity. 2. The wiring pit according to claim 1, wherein the corner-cutting cavity is formed by a triangular eaves-shaped corner-cutting form that is embedded and fixed in a concrete floor at a groove branching corner portion. groove. 3. A wooden frame is assembled at the construction positions of the main pit groove and the branch pit groove on the slab surface of the skeleton concrete,
The main groove form panel that defines the inner wall surface of the main pit groove and the branch groove form panel that defines the inner wall surface of the branch pit groove are attached to this wooden frame, and the outside of the main groove form panel and the branch groove form panel is attached. Form assembling work in which a triangular eaves-shaped corner cutting form is abutted against the panel surface and the slab surface and fixed to the corner portion, and at the upper outer position of the main groove form panel and the branch groove form panel. After performing the receiving frame mounting work to position and install the main groove lid receiving frame and the branch groove lid receiving frame with the spacer member, increase the thickness of the slab on the outside of the frame where the corner cutting form and the lid receiving frame on the slab surface are embedded. The concrete for casting is cast to a predetermined level, and the mold is removed after hardening of the cast concrete.
A method for constructing a wiring pit groove, which is characterized in that the wiring pit groove is formed.