JPH0540675Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention is applied to a wire relay device for construction machinery.
More specifically, the present invention relates to a wire relay device having a waterproof structure.

[Conventional technology]

This type of wire relay device is used, for example, on a dredger to connect a cable from a front-mounted angle gauge to a cable from a measuring instrument on the ship's body in order to measure the depth of excavation. .

The relay device itself includes a connection box in the shape of a hollow box, as shown in FIG. 3, for example. The junction box consists of a body a and a lid c bolted to it with a gasket b interposed therebetween. tube d,
d' has nipples e, e' fitted and fixed at its ends. Cables f, f' are inserted into the tube with their ends protruding from the nipples, and connectors g, h are attached to their ends. Cable connections are made by screwing nipples into screw holes in the side walls of the junction box body and connecting connectors.

[The problem that the idea aims to solve]

In such a relay device, when screwing the nipple into the junction box, the cable may be twisted and breakage may occur, and the cable may also spring back, making screwing in a labor-intensive process.
Furthermore, since the diameter of the connector is larger than that of the nipple, the connector must be attached to the cable inside the narrow junction box, requiring considerable effort to make the connection.

The present invention provides a wire relay device for construction machinery that allows connection work to be performed more easily and quickly.

[Means to solve the problem]

In order to achieve the above object, the present invention has a hollow junction box having a pair of tubes and a pair of holes, and a hole associated with the tube and the hole of the junction box, and the holes are connected to the tube with the holes facing each other. a fitting disposed between the tube, the fitting coupled to the end of the tube and separably attached to the junction box by a fixture, the cable passing through the tube, the fitting and the hole in the junction box; In a wire relay device for construction machinery that is connected by a connector inside a junction box, the joint includes a first member and a second member, and the first member has a collar and a through-hole. A nipple attached to the end of the tube is connected to one end of the hole, and a fixture capable of fixing the cable is attached to the other end, and a seal is provided on the inner side of the brim so as to surround the hole. The second member has a flange portion that rotatably fits the first member and presses its collar against the junction box, and the cable is fixed by the fixing device. The seal insertion side of the first member is pressed against the junction box by the second member, and the second member is detachably fixed to the junction box with a bolt.

[Effect]

As mentioned above, in the wire relay device of the present invention, the joint is composed of the first member and the second member,
Since the first member to which the cable is fixed can freely rotate relative to the second member before the second member is fixed to the connection box, the connectors can be connected without twisting the cable. is possible,
Thereafter, the second member is fixed to the junction box and the seal insertion side of the first member is pressed against the junction box to ensure a reliable seal.

〔Example〕

An embodiment of the electric wire relay device for construction machinery according to the present invention will be described with reference to FIGS. 1 and 2.

In FIG. 1, reference numeral 11 indicates a junction box, 1
2, 12' are cables, 13, 13' are tubes,
Reference numerals 14 and 14' indicate joints, and 15 and 16 indicate a male connector and a female connector, respectively.

The junction box 11 consists of a main body 17 and a lid 18. The main body has a box-like shape with one side wall open, and a pair of opposing side walls are provided with holes 19, 19'. The lid has a flange 21 that covers the open side of the body. This flange is provided with a hole 22, and a hollow cylindrical member 23 is positioned over the hole and attached to the flange.

The tubes 13, 13' consist, for example, of rubber tubes. Nipples 25, 25' are fitted and fixed at the tips of these tubes, and couplings 14, 14' are screwed into the tips of the nipples.

Joints 14, 14' are connected to members 26, 26' and member 2.
7,27'. The members 27, 27' are provided with O-ring grooves on their end faces and through holes 29, 29' in their centers. One end of the through hole is provided with a screw for attaching nipples 25, 25', and the other end is provided with a screw for attaching fixtures 31, 31'. The members 26, 26' each consist of two parts having the same shape, and are fitted into the necks of the members 27, 27' by engaging the stepped portions on the end faces with the collars of the members 27, 27'. At the same time, it is fixed to the side wall of the junction box main body 17 with bolts.

The fixtures 31, 31' are, for example, members 27,
It consists of a nipple screwed into the inner end of 27' and a nut attached to the screw at the end of the nipple. The nipple has a nut and a screw attached to it with a slit that goes into the through hole, and by rotating the nut,
The inner diameter of the threaded portion of the through hole can be changed.

The cables 12, 12' have their ends fixed to the fixing devices 31, 3.
1' and fixed to tubes 13, 13', nipples 25, 25', and members 27, 27'. Then, the outer covering of the part of the cable that protrudes from the fixing device is peeled off, and a male connector 15 is connected to one of the exposed covered wires, and a female connector 16 is connected to the other, and the connectors are connected to each other. By joining, they are connected to each other and are housed inside the main body 17 while being bent upward into an inverted U-shape.

In this wire relay device, the cables can be separated by removing the lid 18 from the main body 17, separating the connectors 15 and 16, and attaching the members 26 and 26' to the main body 17.
This can be done by removing the bolt that holds it in place 7 and pulling the cable. At this time, the cables 12, 12' are fixed to the junction box 11 by the members 26, 26', and the diameters of the holes 19, 19' in the main body 17 can be freely selected. Connectors 15 and 16
The connectors 15, 16 can be pulled out from the connection box 11 without removing the cables 12, 12' from the cables 12, 12', that is, by simply pulling the cables 12, 12' outward.

In addition, to connect the cable 12 and the cable 12', with the cover 18 removed from the main body 17, connect the connectors 15 and 16 to the holes 19 and 1 of the main body 17.
9' and grooves 28, 2 of members 27, 27'.
8', align the holes of the members 27, 27' with the holes 19, 19' of the main body, and then
6' is bolted to the main body 17, and the connector 15,
16, cover the main body 17 with the lid 18, and connect the lid 18 with bolts.

At this time, cable 1 to junction box 11
2, 12' are fixed by a member 26, one of the two members constituting the joint, and the cables can be fixed to the junction box without twisting the cables 12, 12'. hole 19,
19' is larger in diameter than those of connectors 15, 16, and connectors 15, 16 and cables 12,
12' can be made in advance outside the junction box 11, so that the cable connection work can be done easily and quickly.

In addition, since the connection between the connector and the cable does not have to be made inside the junction box, unlike conventional devices, space for this in the junction box is not required, and the length L of the junction box 11 is The portion of the cables 12, 12' housed inside the body 17 and the connector 1 can be made smaller.
5 and 16 are bent into an inverted U shape,
Since it is housed inside the main body 17 and the length L can be further reduced, the installation location of the junction box can be easily determined.

Furthermore, the installation location of the junction box can be freely selected in this way, and the cables 12, 12' are fixed to the junction box 11 by one of the two members constituting the joint,
In addition to O-rings, it is possible to select sealing materials made of the optimal form and material depending on the installation situation, such as sheet gaskets and liquid gaskets, so there is no water intrusion into the inside of the connection box, and it is easy to use, such as on a dredger. Signals can always be transmitted reliably even in environments where the device is constantly exposed to seawater.

[Effect of idea]

As described above, the wire relay device of the present invention has the following features:
A waterproof connection between the tube and the junction box is made by one of the two members constituting the joint, and the connection between the cable and the junction box can be made without twisting a heavy and long cable. Since the connection between the connector and the cable can be made in advance outside the device, the work of connecting the cable can be done easily and quickly.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the electric wire relay device for construction machinery of the present invention, and FIG. 2 is a plan view. FIG. 3 is a sectional view of a conventional electric wire relay device for construction machinery.

Claims (1)

[Scope of utility model registration request] a hollow junction box having a pair of tubes, a pair of holes, and a hole associated with the holes of the tube and the junction box, the tube being disposed between the tube and the junction box with the holes facing each other; a fitting coupled to the end of the tube and separably attached to the junction box by a fixture, the cable being connected to the tube;
In a wire relay device for construction machinery that passes through a joint and a hole in a junction box and is connected by a connector inside the junction box, the joint is made up of a first member and a second member, and the joint is made of a first member and a second member. The first member is
It has a collar and a through hole, one end of which is connected to a nipple attached to the end of the tube,
Attach a fixture that can fix the cable to the other end,
A seal is inserted into the inner surface of the brim so as to surround the hole, and the second member is connected to the first member.
The seal insertion side of the first member with the cable fixed by the fixing device is attached to the second member, and the first member has a flange portion that rotatably fits the members and presses the brim against the junction box, and the seal insertion side of the first member with the cable fixed by the fixture A wire relay device for construction machinery, characterized in that the second member is removably fixed to the junction box with bolts while being pressed against the junction box.