JPH019214Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Object of the Invention) The present invention relates to an improvement of a pipe connecting device for connecting electrical conduits.

The purpose of the present invention is to make it possible to easily, firmly, and quickly connect electrical conduits that cannot be bonded or that are difficult to bond to sockets such as boxes, connectors, or couplings.

(Prior art) Connecting conduits is not easy. In particular, polyethylene conduits cannot be joined with adhesives, so troublesome methods such as screwing or wrapping tape are used to connect them to sockets such as boxes, connectors, or couplings. was. However, it is time-consuming and the bonding force is not sufficient, and the conduit sometimes slips out of the socket of the box, connector, coupling, etc.

(Structure of the invention) The structure of the invention is characterized in that an arm 8 is provided protruding in the axial direction of the annular locking body 4, and a locking protrusion 9 is provided on the arm 8 facing in the radial direction of the locking body 4. , the elasticity of the arm 8 is used to bend the arm 8 inwardly or outwardly, and the locking protrusion 9 is locked in the concave or convex portion of the socket 1. The present invention will be specifically explained below by taking as an example a connecting device for connecting electric conduits made of synthetic resin.

Reference numeral 1 denotes a cylindrical socket, which has a recess 2 in its peripheral wall. Although the recess 2 is in the form of a hole penetrating the peripheral wall in each example shown in the drawings, it may be a simple depression. In the embodiments shown in FIGS. 1 and 4, the socket 1 is integrally formed with a box 3 such as an outlet box or a switch box for electrical wiring.

In the embodiment shown in FIG. 5, the socket 1 is a connector, and in the embodiment shown in FIG. 6, it is a coupling for connecting conduit tubes. Reference numeral 4 denotes an annular locking body, which has an inner surface 6 into which the electric conduit 5 is inserted, and a claw 7 protruding from the inner surface 6.
The claw 7 bites into the electric conduit 5 inserted into the inner surface 6 to prevent the electric conduit 5 from coming off. In each of the embodiments shown in the drawings, the annular locking body 4 has a ring shape with a short length 1, but it may also have a long cylindrical shape with a long length 1 instead. Reference numeral 8 denotes an arm protruding from the locking body 4, which is oriented in the axial direction of the locking body 4 and can be bent inward and outward. It is desirable that a plurality of arms 8 are provided protrudingly as shown in the examples shown in FIGS. 2 and 3. Reference numeral 9 denotes a locking protrusion provided on the arm 8, particularly at the tip of the arm 8, and it is desirable to provide the tip with a slanted surface 9a from the viewpoint of ease of fitting. The locking projections 9 may face outward, as in the example shown in FIGS. 2 and 3, or inward, as in the example shown in FIG. It is preferable that the locking body 4 having the locking protrusion 9 and the arm 8 be made of synthetic resin.

Now, when connecting the socket 1 and the electric conduit 5, which are integrally provided on the box, connector, and coupling, the following procedure is desirable. First, the locking body 4 is fitted into the socket 1. At this time, the elasticity of the arm 8 of the locking body 4 is used to bend the arm 8, thereby locking the locking protrusion 9 in the recess 2 of the socket 1. Next, conduit 5
is inserted into the inner surface of the locking body 4, and the claws 7 are bitten into the peripheral wall of the electric conduit 5. In the case of the examples shown in FIGS. 7 and 8 in which the claws 7 face inward, in addition to the above-mentioned procedure, after fitting the locking body 4 and the conduit 5, the locking protrusion of the locking body 4 is 9 may be locked in the recess 2 of the socket 1.

In the example shown in FIGS. 1 and 4 to 6, in which the locking projection 9 faces outward, the locking projection 9 locks into the recess 2 of the socket 1 from the inside. In the case of this example, since the arm 8 is covered with the peripheral wall of the socket 1, as is clear from the figure, there is an advantage that damage to the arm 8 can be reliably prevented even if an impact is applied from the outside. Furthermore, as shown in FIG. 1, the arm 8 is held between the inner circumferential surface of the socket 1 and the outer circumferential surface of the conduit tube 5 when the arm 8 is locked.
are securely fixed so that they do not move inward or outward, which has the advantage that the engagement between the engagement protrusion 9 and the recess 2 is even more reliable. In addition, in the case of the example shown in FIGS. 7 and 8 in which the locking projection 9 faces inward, the locking projection 9 is connected to the socket 1.
It is locked in the recess 2 from the outside.

FIG. 4 shows an example in which a corrugated conduit is used as the conduit 5. In this example, the claws 7 do not bite into the circumferential wall of the conduit 5, but are drawn into the corrugated shape of the circumferential wall of the conduit 5. This prevents the electric conduit 5 from coming off.

Each of the above-mentioned examples is an example in which a recess 2 is provided in the peripheral wall of the socket 1, and the locking protrusion 9 is locked in this recess 2, but instead of this, as shown in FIG. A convex portion 10 may be provided on the peripheral wall of the mouth 1, and the locking protrusion 9 may be engaged with the convex portion 10.

(Effects of the invention) Since the present invention has the above-described configuration, it has the following effects.

(1) Easy, strong, and quick connection of not only polyethylene conduits that cannot be bonded, but also corrugated conduits that are difficult to bond with sockets such as boxes, connectors, and couplings. This has a great effect on improving work efficiency.

(2) No expensive adhesives are required, and the bonding is highly reliable.

(3) Since the locking protrusion 9 is locked using the elasticity of the arm 8 protruding from the locking body 4, the locking operation is simple.

[Brief explanation of the drawing]

The drawings are representative examples in which the present invention is specifically applied. Figure 1 is a longitudinal side view of a conduit connected to a socket formed in a box, and Figures 2 and 3 are views taken in different directions. Fig. 4 is a vertical cross-sectional side view of the corrugated conduit connected to the socket formed in the box, Fig. 5 is a view equivalent to Fig. 1 applied to the connector, Fig. 6 6 is a diagram corresponding to FIG. 6 applied to a coupling. 7 and 8 are examples in which the locking protrusions face inward, and FIG. 7 is an overall perspective view, and FIG. 8 is a view equivalent to FIG. 1.
Moreover, FIG. 9 is a view corresponding to FIG. 1 of an example in which a convex portion is provided on the peripheral wall of the socket. 1 is a socket, 2 is a recess, 4 is a locking body, 5 is a conduit, 6 is an inner surface, 7 is a claw, 8 is an arm, 9 is a locking protrusion,
10 indicates a convex portion.

Claims (1)

[Claims for Utility Model Registration] (1) A locking body comprising a cylindrical socket having a concave or convex portion on the peripheral wall and an annular locking body having a claw on the inner surface through which the conduit is inserted. The arm is provided with an arm protruding in the axial direction of the locking body, and a locking protrusion provided on the arm facing in the radial direction of the locking body. A pipe connecting device, characterized in that a locking body is attached to a socket by locking into a recess or a convex portion of the pipe. (2) A claim for utility model registration characterized in that the locking protrusion faces outward in the radial direction of the locking body and locks into a concave or convex portion of the socket from the inside of the socket. 2. The pipe connection device according to item 1. (3) A claim for utility model registration characterized in that the locking protrusion faces inward in the radial direction of the locking body and locks into a concave or convex portion of the socket from the outside of the socket. 2. The pipe connection device according to item 1.