JPS61112518A - Method of connecting corrugated conduit tube made of synthetic resin used for underground wiring under waterproofstate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for waterproofly connecting corrugated conduits made of synthetic resin used for underground wiring.

(Prior Art) Conventionally, a corrugated electric conduit used for underground wiring has valleys and peaks spirally arranged in the tube axis direction. For this reason, the following method has conventionally been used to connect corrugated conduits in underground wiring.

That is, first insert the corrugated conduit into the socket, then apply epoxy putty around the outside of the corrugated conduit to fill the gap between the socket opening and the corrugated conduit, and then apply tape over this. , and then another tape was wrapped around both sides of the tape to connect it. In other words,
The corrugated conduit used for conventional underground wiring has valleys and peaks arranged in a spiral shape in the direction of the tube axis, so the receptacle formed when the socket and the corrugated conduit are connected is The gap between the inner peripheral wall of the mouth opening and the outer peripheral wall of the corrugated conduit tube is not constant, and a glue-like putty is used to fill this gap. However, putty itself is used to prevent water from entering from the connection point between the socket and the corrugated conduit, and is not used to connect the socket and the corrugated conduit. It is necessary to connect the socket and the corrugated conduit by wrapping a tape over this tape and wrapping another tape on both sides of this tape, which makes the connection work extremely troublesome. Ta.

In addition, with this method, when applying putty to the outer periphery of the corrugated conduit, if the putty adheres unevenly, there is a risk that water will enter through the thinly adhered areas, resulting in incomplete waterproofing.

(Purpose) The present invention was made in view of the above circumstances, and an object of the present invention is to provide a connection method that can reliably waterproof the connection between a corrugated conduit and a socket with a simple connection work. There is. Further, the second and third inventions aim to facilitate the insertion of the corrugated conduit into the socket-1 and to make the connection between the roughly corrugated conduit and the socket more solid. A further object of the third invention is to enable smooth insertion of a corrugated electric conduit into a socket.

(Structure) The present invention basically involves fitting a ring into the valley of a corrugated conduit,
By inserting the corrugated conduit fitted with this ring into the socket, water is prevented from entering from the connection point, and the corrugated conduit is connected with a stopper to prevent it from being removed from the socket.
This aims to provide a connection method that can be reliably waterproof.

That is, the first invention is a corrugated conduit made of synthetic resin in which peaks and valleys are provided alternately and parallel to each other, and a ring that closely contacts the inner circumferential wall of the socket is fitted into the valley of the corrugated conduit tube. The invention of frJ2 is characterized by inserting the attached electrical conduit into the socket to which it is to be connected, and then fitting into the socket opening a stopper having a locking claw that penetrates into the trough of the corrugated electrical conduit. A ring that tightly contacts the inner circumferential wall of the socket is fitted into the trough of a corrugated conduit made of synthetic resin, in which peaks and troughs are provided alternately in parallel, and then the corrugated conduit with the ring fitted is connected to the receptacle. Put it in your mouth,
Next, insert the locking claw of the stopper into the valley of the corrugated conduit,
Connect the stopper and the socket with a screw, advance the screw to move the stopper towards the socket, and at the same time insert the corrugated conduit into the socket to be connected, and insert the stopper into the socket opening. The third invention is characterized in that a ring that tightly contacts the inner circumferential wall of the socket is fitted into the valley of a synthetic resin corrugated conduit in which peaks and valleys are provided alternately in parallel. Next, insert the corrugated conduit with the ring fitted into the socket to be connected. First, insert the locking claw of the stopper into the trough of the corrugated conduit, and screw the stopper to move it toward the socket. At the same time, the corrugated conduit is inserted into the socket to be connected, and the stopper is screwed into the socket opening.

Hereinafter, the connection method according to the present invention will be sequentially explained using the drawings.

In the present invention, the corrugated electric conduit (1) has a structure in which the peaks and valleys are provided alternately in parallel, and with this structure, the socket ( 3) A ring (2) that tightly fits on the inner circumferential wall is fitted.

Now, in the connection method according to the invention of Part 1, first, as shown in FIG. 1, the ring (2) (see FIG. 2) is passed through the end of the corrugated conduit (1), Fit it into the valley of the edge of (1). The ring (2) is made of an elastic member such as rubber, and the inner diameter of the ring (2) is slightly enlarged to fit it into the trough of the corrugated conduit through the crest. As shown, insert the corrugated LA tube (1) into the socket (3) until the ring (2) is completely seated in the socket (3). 3) Since it is in close contact with the inner peripheral wall, that is, the outer peripheral part of the ring (2) is in contact with the inner peripheral wall of the socket (3), and furthermore, due to the elasticity of the ring (2) itself, the ring (2) is in contact with the inner peripheral wall of the socket (3). Since the inner peripheral wall is pressed, water intrusion into the connection point between the corrugated conduit (1) and the socket (3) is reliably prevented.Next, as shown in Fig. 4, the corrugated conduit The locking claw (6) that enters the valley of (1)
) into the socket (3) opening.

At this time, the locking claw (6) of the latch (4) enters the trough of the corrugated core tube (1), and the corrugated core tube inserted into the socket (3). (1) is prevented from being removed from the socket (3). In this way, the corrugated conduit (1) is connected to the socket (3) in a waterproof manner.

Next, in the connection method according to the second invention of the present application, first, as shown in FIG. 5, the ring (2) is passed through the end of the corrugated conduit (1) to 0Next, as shown in Figure 6, insert the corrugated conduit (1) with the ring (2) fitted into the connection socket (3), and insert the corrugated conduit (1) into the socket (3). The locking claw (6) of the stopper (4) is separately inserted into the valley of 1), and the stopper (4) and the socket (3) are connected with the screw (5). At this time, the corrugated core wire tube (Rino ring (2)
The ring (2) does not need to fit inside the socket (3).
) is pressed against the open end of the socket (3). Next, as shown in 7th T1, by rotating the screw (5) in the screwing direction, the stopper (4) is moved so as to be drawn toward the socket (3), and the stopper (4) is moved toward the socket. (3) Fix it in the opening. At this time, the locking claw (6) of the stopper (4) has entered the valley of the corrugated conduit (1), so as the stopper (4) moves, the corrugated conduit (1)
is inserted so as to be pushed into the socket (3). In addition, the corrugated conduit (1) inserted into the socket (3)
Extraction is stopped. In this way, the corrugated conduit (1) is connected to the socket (3) in a waterproof manner.

Next, in the connection method according to the invention of Part 3, as shown in FIG. 8, the ring (2) is first passed through the end of the corrugated conduit (1), Next, as shown in Fig. 9, insert the corrugated conduit (1) with the ring (2) fitted into the socket (3) to be connected, and then insert the corrugated conduit (1) into the socket (3) to be connected. Insert the locking claw (6) of the stopper (4) into the valley of 1). Next, as shown in Fig. 1θ, insert the W catch (4).
By screwing the stopper (4) into the opening of the socket (3). At this time, the locking claw (8) of the stopper (4) has entered the valley of the corrugated conduit (1), so the stopper (4)
With the movement of 4), the corrugated conduit (1) also moved to the socket (3).
It is inserted by pushing it inside. Further, the corrugated electric conduit (1) inserted into the socket (3) is prevented from being removed from the socket (3). Note that before the stopper (4) is screwed in, the ring (2) of the corrugated conduit (1) does not need to be in the socket (3); ) The corrugated conduit (1) can be connected to the socket (3) in a waterproof manner as long as it is pressed against the open end.

(Effect) As described above, according to the connection method of the present invention, simply by inserting the corrugated conduit with the ring fitted into the socket, water can be flowed into the corrugated conduit 1 to the connection point between the conduit and the socket. can prevent intrusion,
Moreover, the corrugated conduit is connected in a state in which it is prevented from being removed from the socket by a stopper having a locking claw that penetrates into the trough of the corrugated conduit,
Can be reliably waterproofed with simple connection work. Therefore, the connection work is easier than in the conventional connection method, which has a complicated structure and the connection work is complicated, and there is no fear that water will enter through thinly adhered areas due to variations in putty adhesion, resulting in incomplete waterproofing.

Furthermore, in the connection methods according to the second and third inventions, the corrugated conduit is inserted into the receptacle by utilizing the rotational force of the screw or the rotational force of the stopper. Easy to insert. Furthermore, the corrugated electric conduit can be inserted deeply into the socket, and therefore the connection between the corrugated electric conduit and the socket can be made more solid.

Furthermore, in the connection method according to the third invention, when screwing the corrugated electric conduit into the socket opening, the corrugated electric conduit can be inserted into the socket as the stopper rotates, and the corrugated electric conduit can be firmly inserted into the socket. In addition, it is possible to insert the corrugated electric conduit into the socket where the corrugated electric conduit is to be connected, so that the center lines of the corrugated electric conduit and the socket are always aligned. The tube can be inserted into the socket more smoothly. Therefore, unlike inserting the corrugated conduit into the socket by hand, the insertion direction will not be distorted and the corrugated conduit will not be damaged. Corrugated conduit can be smoothly inserted into the socket without causing any damage. Further, since the stopper can be screwed onto the socket opening with fingers, no additional tools are required, making the connection work easier.

By the way, in recent years, electrical conduits made of polyolefin-based synthetic resins have been increasingly used in electrical wiring work, and this type of electrical conduits cannot be bonded with adhesives, so this invention Ideal for underground wiring.

[Brief explanation of drawings]

1, 3 and 4 are side sectional views showing various aspects of the connection method according to the first invention, FIG. 2 is a plan view of the ring,
5 to 7 are side sectional views showing each aspect of the connection method according to the second invention, and FIGS. 8 to 1O show each aspect of the connection method according to the third invention. FIG. In the figure, (1) is a corrugated conduit, (2) is a ring, (3) is a socket, (4) is a stopper, (5) is a screw, and (6) is a locking claw (6). . Figure 11 Figure 12 Figure 3 Figure 4 Figure 5 Figure 61 Figure 7

Claims (1)

[Scope of Claims] 1) A ring that tightly contacts the inner circumferential wall of the socket is fitted into the trough of a synthetic resin corrugated conduit in which peaks and troughs are provided alternately in parallel, and then a corrugated conduit in which the ring is fitted is Used for underground wiring characterized by inserting a wired conduit into a socket to be connected, and then fitting a stopper having a locking claw that penetrates into the valley of the corrugated conduit into the socket opening. A method of waterproofly connecting corrugated conduit made of synthetic resin. 2) Fit a ring that tightly fits the inner circumferential wall of the socket into the valley of a synthetic resin corrugated conduit with alternating parallel peaks and valleys, and then connect the corrugated conduit with the ring fitted. Then insert the locking claw of the stopper into the valley of the corrugated conduit, connect the stopper and the socket with a screw, and screw the screw forward to move the stopper towards the socket. A method for waterproofly connecting corrugated electric conduit made of synthetic resin used for underground wiring, characterized by moving it and simultaneously inserting it into a socket, and fixing a stopper to the socket opening. 3) Fit a ring that tightly contacts the inner circumferential wall of the socket into the trough of a corrugated conduit made of synthetic resin in which peaks and troughs are arranged in parallel in alternating directions, and then connect the corrugated conduit with the ring fitted. Then insert the locking claw of the stopper into the trough of the corrugated conduit, screw the stopper and move it toward the socket, and at the same time insert the corrugated conduit into the socket to which it should be connected. A method for waterproofly connecting corrugated conduit made of synthetic resin used for underground wiring, characterized by inserting the cable into the socket and screwing the stopper into the socket opening.