JPH0550935U - Wiring duct mounting structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a wiring duct mounting structure capable of fixing a duct main body of a wiring duct without damaging or damaging a coating of electric wires or the like housed therein. [Structure] An attachment hole for inserting a screw groove portion of a fixing screw is formed in a bottom plate of an elongated gutter-shaped duct main body portion. A counterbore-like stepped portion into which the mounting seat for the fixing screw is inserted is provided around the mounting hole on the inner surface side of the bottom plate. The step portion is formed to a depth that allows the entire mounting seat or the entire mounting seat and the screw head of the fixing screw to be immersed. Since the screw head of the fixing screw in the state where the duct main body is attached by the fixing screw does not protrude into the inside of the mounting seat or the stepped portion in a state of being in pressure contact with the upper surface of this mounting seat, and does not project onto the inner surface of the bottom plate.
The covering of electric wires and the like will not be damaged even if concealment is not performed by attaching a protective tape or the like.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mounting structure for mounting a duct main body of a wiring duct accommodating a large number of electric wires or cables on a wall surface or the like.

[0002]

[Prior Art]

 In this type of general wiring duct, the duct main body (1) has side walls (3) and (4) on the left and right sides of the bottom plate (2) as shown in FIG. It has a long gutter shape with a U-shaped cross-section, and a slit-like opening (5) with a constant pitch for forming wire lead-out holes in both side walls (3) and (4). A break groove (12) is provided in the longitudinal direction of the duct that connects the lower ends of the openings (5). If necessary, the wall piece (7) between the adjacent openings (5) is broken. By doing so, the wire lead-out hole can be formed by breaking it off.

In use, the outer surface of the bottom plate (2) is joined to a wall surface or the like to which the bottom plate (2) is to be attached, and the fixing screw (9) is formed in the bottom plate (2) in the form of an elongated hole (8). After fixing the duct main body (1) by inserting it into the wall surface etc. and storing the required electric wires and cables in the duct main body (1), the lid (13) is attached to the duct main body (1). The procedure is carried out in such a manner that the duct main body (1) is covered by engaging with the engaging portion (6) formed by bending at the tip of both side walls (3) and (4) of (1). In addition, such an elongated duct main body (1) is manufactured by forming an outer shape by extrusion molding and then punching an attachment hole (8) by punching.

[0004]

[Problems to be solved by the device]

 However, as shown in FIG. 4, when the duct main body (1) is fixed, the screw head (9a) of the fixing screw (9) is projected to the inner surface of the bottom plate (2), and the screw head (9a) In order to prevent the () from being damaged by catching the coating of the electric wire or the cable, a protective tape (10) such as a vinyl tape is attached to hide the screw head (9a). Therefore, it is necessary to individually attach the protective tape (10) to each fixing screw (9), and moreover, the protective tape (10) attached to the fixing screw (9) may be rubbed by an electric wire or the like. There is a problem in that the desired effect cannot be obtained even though it is easy to peel off and requires complicated attachment work.

Therefore, the present invention is to provide a wiring duct mounting structure capable of securely fixing the duct main body without damaging the coating of electric wires or the like housed in the duct main body. This is an issue.

[0006]

[Means for Solving the Problems]

 The present invention has a wiring duct mounting structure configured as follows as a technical means for achieving the above-mentioned problems. That is, in a mounting structure for fixing a synthetic resin duct main body, which has a U-shaped cross section and has a long gutter shape as a whole, with side walls standing on both left and right sides of the bottom plate, to the bottom plate, A mounting hole through which the screw groove portion of the fixing screw is inserted is formed, and a counterbore-like stepped portion into which the mounting seat of the fixing screw is inserted is formed around the mounting hole on the inner surface side of the bottom plate. The recess is provided, and the stepped portion is formed to a depth such that the entire mounting seat or the entire mounting seat and the screw head of the fixing screw is immersed.

[0007]

[Action]

 When installing the duct body, join the outer surface of the bottom plate of the duct body to the wall surface to be attached, etc., insert the mounting seat into the step, and then insert the fixing screw through the engaging hole and the mounting hole of the mounting seat. It is carried out by the procedure of screwing into the wall surface. After the completion of this mounting, the screw head of the fixing screw is embedded in the engaging hole of the mounting seat, or is recessed in the step portion while being pressed against the upper surface of the mounting seat and does not project onto the inner surface of the bottom plate. Therefore, even if a protective tape or the like is not attached and concealed, the head is not caught by the electric wire coating and the coating is not damaged or damaged.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is an exploded perspective view of a wiring duct to which an embodiment of the mounting structure of the present invention is applied, and FIGS. 2 (a) and 2 (b) are plan views of the same mounting structure and a cross section taken along the line AA of the plan view. The drawings are respectively shown, and in these drawings, in order to simplify the explanation and facilitate understanding, the same reference numerals are given to the same parts as those in FIGS. 3 and 4. Further, the duct longitudinal groove (12) and the lid (13) connecting the lower ends of the openings (5) of both side walls (3) and (4) of the duct main body (11) are shown in FIG. Although not shown in FIG. 3 and FIG. 4, it is similar to the existing one, and the difference in the duct body (11) is that the bottom plate (2) has a screw groove portion (17a) of a fixing screw (17) described later. A mounting hole (14) through which the mounting screw (17) is inserted is formed, and the thickness of the mounting seat (16) of the fixing screw (17) is approximately the same as the thickness of the mounting screw (17) around the mounting hole (14) on the inner surface side of the bottom plate (2). It is only a configuration in which a rectangular counterbore-like step portion (15) having a depth of is recessed. In this embodiment, a case where a countersunk screw is used as the fixing screw (17) is illustrated, and the mounting seat (16) of the fixing screw (17) has one side in the lateral direction of the step (15). A square outer shape having a length slightly shorter than the width, and an engagement hole (16a) into which the screw head (17b) of the fixing screw (17) is embedded is bored in the central portion thereof. It has become.

Therefore, the outer surface of the bottom plate (2) of the duct body (11) is joined to the wall surface or the like to be mounted, and the mounting seat (16) is fitted into the step (15) as shown in FIG. 2 (a). After that, the screw groove portion (17a) of the fixing screw (17) is inserted into the engaging hole (16a) and the mounting hole (14) of the mounting seat (16) and is screwed into the wall surface or the like, whereby the duct main body portion ( 11) is attached. After this mounting is completed, as shown in FIG. 2 (b), the mounting seat (16) is positioned substantially flush with the inner surface of the bottom plate (2), and the screw head (17b) of the fixing screw (17) is located. ) Is embedded in the engaging hole (16a) of the mounting seat (16). Therefore, since the screw head (17b) of the fixing screw (17) is positioned so as to be substantially flush with the inner surface of the bottom plate (2), the screw head is not hidden by attaching a protective tape or the like. (17b) does not get caught in the coating of the electric wire and damage or damage the coating. Further, since the long duct main body part (11) of the above-mentioned embodiment is molded by using the plastic continuous injection molding method, the step part (15) is provided around the mounting hole (14). It is possible to easily fabricate a structure provided with.

The present invention is not limited to the above-mentioned embodiment, and for example, the same fixing screw as shown in FIG. 4 can be used. However, in that case, it is necessary to form the stepped portion (15) in a shape having a depth substantially equal to the sum of the thickness of the mounting seat (16) and the thickness of the screw head.

[0011]

[Effect of the device]

 As described above, according to the wiring duct mounting structure of the present invention, the screw head of the fixing screw after the duct main body is mounted is inside the mounting seat or inside the stepped portion while being pressed against the upper surface of the mounting seat. Since it does not protrude into the inner surface of the bottom plate when it is immersed in, it is possible to obtain a remarkable practical effect in which damage to the coating of electric wires and the like is inevitable without the need to attach protective tape or the like.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a wiring duct to which a mounting structure of the present invention is applied.

2 (a) and 2 (b) are a plan view and a cross-sectional view taken along line AA of the same mounting structure.

FIG. 3 is a plan view of a duct body portion of a conventional wiring duct.

FIG. 4 is a vertical sectional view of the attachment structure of the above.

[Explanation of symbols]

 2 Bottom plate 3,4 Side wall 11 Duct body 14 Mounting hole 15 Step 16 Step 17 Fixing screw 17a Screw groove 17b Screw head

Claims (1)

[Scope of utility model registration request] 1. A mounting structure for fixing a duct main body made of synthetic resin, which has a generally U-shaped section and has a long gutter shape in which sidewalls are erected on both right and left sides of a bottom plate, to a wall surface or the like. A mounting hole into which the screw groove portion of the fixing screw is inserted is formed in the bottom plate, and a counterbore-shaped step into which the mounting seat of the fixing screw is inserted around the mounting hole on the inner surface side of the bottom plate. The wiring duct mounting structure is characterized in that the portion is recessed, and the stepped portion is formed to a depth for immersing the entire mounting seat or the mounting seat and the entire head of the fixing screw. ..