JPH0724745Y2 - Insulation bushing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an insulating bushing fitted and supported on a conduit or a cord.

(Prior Art) As a conventionally known insulating bushing, there is an integrally molded insulating bushing made of a soft rubber as shown in FIG. 5 or an insulating bushing made of a combination of a hard synthetic resin flanged pipe and a nut. .

(Problems to be solved by the invention) Since the conventionally known insulating bushing made of soft rubber is soft, there is a possibility that it will often come off from the box when the conduit or the like moves in the axial direction. In addition, when installing the insulating bushing by combining the flanged pipe and the nut,
Since it needs to be screwed in, there is a problem in that it requires much labor for mounting.

(Means for Solving the Problems) However, according to the present invention, since the fitting body and the fitting ring may be simply press-fitted, the mounting is simple and easy, and once fitted, the fitting is easy. Cannot be removed.

That is, the present invention is directed to a fitting insert made of an insulating material, which comprises a flanged tube in which a plurality of annular projections are arranged side by side on the outer wall of the fitting portion, and a hook for tightly fitting and locking the tube and the annular projection. An insulating bushing, which is formed by combining with a fitting ring made of an insulating material and having a fitting hole provided with a stop ridge, and an annular groove is provided outside the fitting hole of the fitting ring. Further, both the annular ridge and the hooking ridge have a sawtooth cross section or an arcuate cross section.

(Operation) According to the present invention, the fitting insert has the flanged tube body having the plurality of annular projections on the outer wall of the fitting portion, and the fitting hole having the hooking projection to fit the fitting insertion body. Since it is combined with the fitting ring, the mounting is extremely easy, and once fitted, it becomes difficult to remove it. In addition, since the annular groove is provided outside the fitting hole, the fitting hole is easily expanded and the fitting is easy.

(Example) Next, the Example of this invention is described about drawing.

A fitting insert 4 made of a hard rubber, which is composed of a tubular body 3 with an annular brim 2 in which a plurality of annular ridges 1 are arranged in parallel with each other at a fitting portion, and the annular ridge 1 of the tubular body 3 are tightly fitted and locked. The insulating bushing 7 is a combination of a fitting ring 6 made of hard rubber and having a fitting hole 5 provided with a hooking projection 8. The annular ridge 1 and the hanging ridge 8
Means a sawtooth cross section as shown in FIG. 2 or an arcuate cross section 9 as shown in FIG.

Reference numeral 10 in the drawing denotes an annular groove formed outside the fitting hole 5.

The insulating bushing 7 of this invention is, for example, a metal box 11
It is attached to the through hole 12 of the above and is used to support the electric wire tube 13 in an insulating manner.

The annular groove 10 in the above is provided to facilitate expansion (deformation) of the hole edge of the fitting hole when the tube body and the fitting hole are fitted to each other. Generally, to facilitate fitting,
Although the notch groove is provided in the longitudinal direction to deform the tube body 3 side, the notch groove needs to be secondarily processed after the tube body 3 is molded. If the annular groove 10 is provided in the point fitting ring 6, it can be provided at the same time as the molding of the fitting ring 6, and the need for secondary processing can be eliminated.

The insulating bushing of this invention is made of hard rubber, synthetic resin, synthetic rubber, or the like as described above, and is formed of a material having insulating properties and elasticity.

(Effect of device) Since this device has a combination of a fitting insert and a fitting ring,
Since the outer diameters of the annular collar and the fitting ring can both be set to required sizes, there are various effects such that they cannot be removed from the metal box during use and can be easily attached with one touch.

Also, since an annular groove is provided outside the fitting hole of the fitting ring to provide ease of fitting by expansion, this ease is secured at the same time as molding of the fitting ring, and secondary processing is required. There is an effect that can be eliminated.

[Brief description of drawings]

FIG. 1 is a front view of the embodiment of the present invention in a fitted state,
2 is a partially cutaway front view of the same embodiment, FIG. 3 is a partial sectional view of another embodiment, FIG. 4 is a partial sectional view of the same usage state, and FIG. 5 is a conventional sectional view. FIG. 3 is a front view in which a part of an insulating bushing is cross-sectional. DESCRIPTION OF SYMBOLS 1 ... Annular ridge, 2 ... Annular collar, 3 ... Tube body 4 ... Fitting body, 5 ... Fitting hole, 6 ... Fitting ring 7 ... Insulating bushing, 8 ... Latching ridge

Claims (2)

[Scope of utility model registration request] 1. A fitting insert made of an insulating material, which comprises a flanged tube having a plurality of annular projections arranged side by side on the outer wall of the fitting portion, and a hook for tightly fitting and locking the annular projection of the tube. An insulating bushing which is formed by combining with a fitting ring made of an insulating material and having a fitting hole provided with a stop projection, and an annular groove is provided outside the fitting hole of the fitting ring. 2. The insulating bushing according to claim 1, wherein both the annular protrusion and the hooking protrusion are serrated in section or arcuate in section.