JPH02146914A - Corrugated flexible pipe - Google Patents

Abstract

PURPOSE:To prevent removal of connected appliance by slightly recessing the upper face of a trapezoid formed by two adjoining waves of a corrugated pipe having waves on its outer periphery thereby holding the resilient recovery force of a hooking chip fixed to the appliance. CONSTITUTION:An appliance 2 is contacted with the ridge section 3 and the root section 4 formed on the outer circumference of a corrugated pipe 1. A hooking chip 13 comprising a resiliently deformable section 11 and a click 12 is fixed to the base section 10 on the inner circumferential face then the click 12 is engaged with the root section 4 in order to prevent removal of the corrugated pipe 1 from the appliance 2. Upper face of a trapezoid 5' formed by two continuous ridge sections 3 of the corrugated pipe 1 is slightly recessed 5a' and a name plate is stuck thereto. By such arrangement, resilient recovery force of the resilient deformable section 11 is maintained even upon contact of the click 12 with the trapezoid 5' resulting in prevention of fall off of the corrugated pipe 1 due to aging.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a corrugated flexible tube.

[Conventional technology]

FIGS. 4 to 6 show various examples in which the corrugated flexible tube 1 and the connecting device 2 are connected to each other, and wiring (not shown) is passed therethrough. As shown in these figures, the corrugated flexible tube 1 has a cylindrical shape, and the cylindrical portion has a corrugated cross section in which peaks 3 and troughs 4 are alternately continuous in the axial center direction. It has become.

A part of the longitudinal direction has two peaks of the waveform part.
The section 5 has a trapezoidal cross section that looks like a mountain. On the outer periphery of the trapezoidal part 5, there are markings 6 necessary for the product,
For example, the product name, product number, company name, etc. are formed in one piece. There are various connecting devices connected to the corrugated flexible tube 1 as shown in FIGS. 4 to 6, and each connecting device 2 has a threaded portion 7 on the outer periphery of one end as shown in the figure. The inner periphery of the other end has a mounting base 10 at the negative end and an elastic deformation section 11 at the middle extending from the base 10.
A hooking piece 13 is provided on the inner periphery, and the inner periphery of the tip is a claw 12. In the connecting device 2, the elastically deformable portions 11 are elastically deformed in the fitting direction The elastic restoring force is exerted to return the mold 12 in the inner radial direction, and the claws 12 are hooked on the peaks 3 with the elastic deformation portions 11 acting as a support. This prevents the corrugated flexible tube 1 and the connecting device 2 from coming off. .

[Problem to be solved by the invention]

By the way, the trapezoidal part 5 to which the mark 6 is attached is conventionally
Since it had a flat cross-sectional shape, when the pawl 12 rests on this part 5 during fitting, the elastic deformation part 11 appears in the part shown in Fig. 4, and the part shown in Figs. Each of the base parts 10 is subjected to unreasonable stress,
When the hook pieces 13 are made of plastic material, these parts may undergo plastic deformation and each hook piece 13 may lose its elastic restoring force after about half a day. As a result, even if the corrugated flexible tube 1 and the connecting device 2 are fitted from the above-mentioned hanging state,
This resulted in a situation where the claws 12 could no longer be caught on the peaks 3 of the corrugated flexible tube 1.

In view of the above circumstances, an object of the present invention is to ensure that the hooking piece is always caught on the peak.

[Means to solve the problem]

In order to solve the above problem, in the present invention, the trapezoidal portion has an outer circumferential portion to which a mark is attached, which is slightly concave in the inner diameter direction.

[For production]

If the outer periphery of the trapezoidal part where the marking is attached is slightly concave in the inner diameter direction, the elastic restoring force of the hook piece will not be lost even if the claw rests on the trapezoidal part and is held. .

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments thereof and the drawings.

1 to 3 show various embodiments of the corrugated flexible tube according to the present invention. In these figures, components similar to those shown in FIGS. 4 to 6 are designated by the same reference numerals as those in these figures, and redundant explanation will be omitted. By the way, the trapezoidal portion 5' to which the marking 6' is attached, as shown in FIGS. 1 to 3, has a cross-sectional shape that is concave in the inner radial direction in the shape of a flat square, and the outer periphery thereof becomes the concave portion 5a'. At the same time, the cross section of the sign 6' is shaped like a flat square square and extends along the recessed portion 5a'. Note that the recessed portion 5
The amount of depression of a' is about 0.4 to 1.0x.

In each figure (al indicates the claw 12 of the hooking piece 13 in the recess 5a').
He is standing on top of it and is looking at the process of fitting it in. As shown in FIG. 1(a), even if the hooking piece 13 rests on the trapezoidal part 5', the claw 12 will be moved by the recessed part of the recessed part 5a' because the recessed part 5a' is provided as described above. As a result, the amount of deformation of the elastically deformable portion 11 also decreases, and the deformation remains within the elastic range.When the hook piece 13 is then fitted in the X direction, the claw 12 of the hook 13 is Due to the elastic restoring force possessed by 11, the same figure (b)
As shown in the figure, it becomes possible to get caught on the next peak 3.

In the ones shown in FIGS. 2(a) and 3(al), each mounting base 10 deforms within the elastic region, so each FIG.
), the claws 12 are able to bite into the valleys 4 and become caught on the peaks 3. As a result, even if the corrugated flexible tube 1 and the connecting device 2 are attempted to be pulled out in the Y direction, the claws 12 bite into the corrugated flexible tube 1, preventing the pullout. In such a corrugated flexible tube, if the trapezoidal part has a slightly concave shape in the inner radial direction at the outer circumferential part where the marking is attached, even if the claw rests on the trapezoidal part and is held, the elasticity of the hook piece will be insufficient. Resilience will not be lost. This ensures that the hook piece is always caught on the peak.

〔Effect of the invention〕

Since the corrugated flexible tube according to the present invention is configured as described above, the hooking piece is always caught on the ridge portion and is prevented from coming off.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the corrugated flexible tube according to the present invention together with a connecting device, and Fig. 1 (Al is a cross-sectional view showing how the claws are positioned in the recessed portions; in the same figure) Fig. 2 shows another embodiment, and Fig. 2 (a) shows a cross-sectional view showing how the claw is caught in the crest and the corrugated flexible tube and the connecting device are prevented from being removed. Figure 3 (b) is a cross-sectional view showing how the claw is caught on the peak and the corrugated flexible tube and the connecting device are prevented from being removed. Another example is shown in the same figure (Al is a cross-sectional view showing how the claw is located in the recessed part, and the same figure (
b) is a cross-sectional view showing how the claws are caught on the peaks and the corrugated flexible tube and the connecting device are prevented from being removed; Figures 4 to 6 show how the claws of various connecting devices can be conventionally corrugated. FIG. 4 is a cross-sectional view of the flexible tube as it rests on the trapezoidal part. 1... Corrugated flexible tube 2... Connecting device 3... Peak portion 4... Valley portion 5'... Trapezoidal portion 5a''... Concave portion 6'... Marking 10...・Mounting base 11...
・Elastic deformation part 12...claw 3...hanging piece

Claims (1)

[Claims] 1. A cylindrical part having a wavy cross-section in the direction of the axis center at least on the outer circumferential surface side, and a part of the cylindrical part having a substantially trapezoidal cross-section in which the plurality of crests of the wavy part are combined into one crest. It has a trapezoidal shape, and the necessary markings for the product are attached to the outer periphery of the trapezoidal part. One end is the mounting base, and the middle part extending from the base is an elastic deformation part, and the inner part of the tip is an elastic deformation part. By being fitted into a cylindrical connecting device that has a hook piece on its inner periphery, the elastically deformable portion is elastically deformed in the fitting direction, and the claws adjust to the outside diameter of the connecting device. A corrugated flexible tube that escapes in the opposite direction and is supported by the elastic deformation portion so that the claws are caught on the mountain portions, and the trapezoidal portion is attached to the marking. A corrugated flexible tube characterized by having a slightly concave outer circumferential portion in the inner diameter direction.