JPS6022740Y2 - Wiring duct - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a device for engaging a wiring duct and a lid.

If the wiring duct is installed with its longitudinal direction vertical, to prevent the lid from slipping off due to its own weight,
Conventionally, methods have been adopted such as firmly tightening the duct body and the lid using a binding band, or increasing the pressing force of the fitting part to increase the frictional force.

However, the method of using a binding band is inconvenient to use, and the method of increasing the pressing force on the fitting part not only requires a large amount of force when attaching and detaching the lid, but also requires a large amount of force when attaching and detaching the lid. It had the disadvantage of causing destruction.

Particularly, in the case of a type having a cut groove reaching the upper edge of the opening surface of the duct main body as shown in the figure, attachment and detachment work is particularly difficult.

In view of the above, the present invention increases the frictional force of the mating part in the mated state while reducing the stress generated during attachment and detachment work,
To provide a wiring duct which prevents destruction during attachment/detachment work and prevents a lid from slipping down in a fitted state without using any binding bands or the like.

The present invention will be explained below with reference to examples.

FIG. 1 shows an overall perspective view of an embodiment of the present invention, and FIG. 2 shows an enlarged sectional view of the fitting portion of FIG. 1.

Main body side fitting portions 3A, 3B and lid side fitting portions 4A, 4B are formed at the upper portions of both side walls of the duct body 1 and on both sides of the lid 2, respectively, each having an uneven shape with a uniform cross section in the longitudinal direction of the duct. The configuration of the fitting part in this example is as follows:
A protrusion 6 having a pressing slope 5 formed on the lid side, a pressing slope 7 facing the slope 5 formed on the main body side, a folding part 8 that suppresses lifting of the projection 6, and The sliding slope part 9 makes it easier to fit the lid into place.

Here, the protrusions 6 formed on both sides of the lid 2 are made of soft resin, for example, soft vinyl chloride resin (as shown by dots), and the other parts are made of hard resin, for example, hard vinyl chloride resin. The product of the present invention is obtained by simultaneously injecting a soft resin material and a hard resin material from two injection ports of a molding machine to form an injection bottom mold, and then fixing and integrating the two materials without cooling.

As another embodiment of the present invention, as shown in FIG. 3, triangular small protrusions 11.11 having a uniform cross section in the longitudinal direction of the duct are provided on the pressing inclined surface 5, so that the pressing force is concentrated at the tips of the small protrusions. Alternatively, a large frictional force may be generated.

Of course, even if this small protrusion is provided on the main body side, the same effect will be produced.

According to the present invention, since the friction coefficient of the soft resin is larger than that of the hard resin, a larger friction force can be obtained for the same pressing force, and the lid can be prevented from slipping off.

In addition, since the soft resin part is more flexible than the hard resin part, even if a load that exceeds the allowable value is applied to the mating part during attachment/detachment work, the stress is reduced due to the deformation of the soft resin part. The destruction accident was resolved.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view of an embodiment of the present invention. FIG. 2 is a partially enlarged sectional view of the fitting portion of FIG. 1. FIG. 3 is a partially enlarged sectional view showing another embodiment of the fitting part. 1...Duct body, 2...Lid, 3...
...Body side fitting part, 4...Lid side fitting part.

Claims (1)

[Scope of utility model registration request] In a wiring duct in which the duct body and the lid are removably engaged with the duct body by fitting portions formed on both side walls of the duct body and on both sides of the lid, the fitting portions of the duct body are made of hard resin. A wiring duct characterized in that only the fitting part of the lid is made of a soft resin, the remaining part is made of a hard resin, and the entire lid is molded at the same time.