JP2021164256A - Closure of cable connection device - Google Patents

Abstract

To provide a closure of a cable connection device, which can be easily used for a railway vehicle.SOLUTION: A closure of a cable connection device cable is provided with: a housing 10 having a first open part 11 having a concave shape in which a connection part formed in a convex shape of a connection device can be inserted, a second open part 12 formed in the concave shape in a region on the side opposite to the first open part 11, a fixed end 14 arranged on a wall part 13 between the first open part 11 and the second open part 12, and a ground part 16 to which a ground line 19 is connected; fixed parts 21 and 22 fixing the connection part inserted into the first open part 11 and fixing the fixed end 14; an insulation plug 31 having an insulation quality arranged in the second open part 12; and a cap part 35 blocking the open of the second open part 12.SELECTED DRAWING: Figure 1

Description

The present invention relates to a closure for a cable connection device suitable for use in railroad vehicles.

There is known a terminal connection portion that is directly connected to an electric device and can increase the number of branched cables (see, for example, Patent Document 1).

Japanese Patent No. 5950745

On the other hand, even in railway vehicles, cables are used to supply the electric power collected by the current collector to various parts of the vehicle. When laying cables for railroad cars on railroad cars, as in the case of electrical equipment, terminal connections that connect cables and equipment other than cables and intermediate connections that connect cables to each other are required. Is used.

In addition, when the intermediate connection part and the terminal connection part are not distinguished from each other, it is simply referred to as a connection part. The connection is also referred to as termination or joint.

Further, it is conceivable to prepare a spare terminal in advance at the connection portion connected to the above-mentioned device. Spare terminals can be used to connect measuring instruments used for equipment repair and maintenance. It is conceivable to prepare a spare terminal by using a connection portion such as Patent Document 1.

Closers that close such spare terminals are known. Compared to electrical equipment placed in facilities such as buildings, railroad vehicles are different in that they generate vibrations and shocks due to vehicle running. In the case of fasteners used in facilities such as buildings, there is a problem that there is a possibility that the spare terminals cannot be sufficiently closed due to problems such as loosening of the fasteners to the terminals due to vibration or impact. ..

The present invention has been made to solve the above problems, and an object of the present invention is to provide a closing tool for a cable connecting device that is easy to use for a railway vehicle.

In order to achieve the above object, the present invention provides the following means.
The closing tool of the cable connecting device of the present invention is a closing tool attached to a connecting portion formed in a convex shape of the cable connecting device, and has a first opening having a concave shape into which the connecting portion can be inserted, and the said. The first opening is arranged in a second opening having a concave shape in a region opposite to the insertion direction of the connection portion, and a wall portion between the first opening and the second opening. A housing having a fixed end and a grounding portion to which a grounding wire is connected, a fixed portion for fixing the connecting portion and the fixed end inserted into the first opening, and a fixed portion for fixing the fixed end, and arranged in the second opening. An insulating plug having an insulating property is provided.

According to the closing tool of the cable connecting device of the present invention, the conductor and the fixed end are fixed by the fixing portion, and the fixing is less likely to be loosened due to vibration and impact as compared with the case where the conductor and the fixed end are fixed by other methods. It has the effect of being easy to use.

It is a figure explaining the structure of the closing tool which concerns on one Embodiment of this invention. It is a figure explaining the structure of the cable connection device connected with a closing tool. It is a figure explaining the structure of the cable connected with the cable connection device. It is a figure explaining the state which the cable connection device, the cable, and the fastener are connected.

The closing tool of the cable connecting device according to the embodiment of the present invention will be described with reference to FIGS. 1 to 4.
In the present embodiment, the cable connecting device 50 and the closing tool 1 will be described by applying them to an example used in a railway vehicle. Specifically, it will be described by applying it to an example in which the cable connecting device 50 is used for connecting a cable (for example, an ultra-high voltage cable) that supplies the electric power collected by using a current collecting device such as a pantograph to various parts of the vehicle. do.

The closing tool 1 is used for the cable connecting device 50. The cable connected to the cable connecting device 50 is laid on the roof of a railway vehicle, under the floor, or on the side surface between vehicles.

The railroad vehicle to which the cable connecting device 50 and the closing tool 1 of the present embodiment are applied is a railroad vehicle that uses an AC power source. More specifically, it is a railroad vehicle that uses a single-phase AC power supply. It may be a railroad vehicle that uses a three-phase AC power supply.

The frequency of the AC power supply may be a commercial frequency of 50 Hz or 60 Hz, or may be a frequency other than the commercial frequency. The voltage of the AC power supply can be exemplified by 20 kV, 25 kV, etc., but may be a voltage other than these voltages.

The closing tool 1 is attached to the connecting terminal 61 in the cable connecting device 50, which will be described later. In addition, it protects the attached connection terminal 61 and insulates it from the surroundings. As shown in FIG. 1, the closing tool 1 is provided with a housing 10, a bolt (fixing portion) 21, a nut (fixing portion) 22, an insulating plug 31, and a cap portion 35.

The housing 10 is a cylindrical or cylindrical member that constitutes the outer shape of the closing tool 1, and is a member that covers the periphery of the connecting terminal 61. The structure and specifications related to the insulation of the housing 10 can be the same as the structure and specifications related to the insulation of the connection terminal 74 of the cable 70. As a material constituting the housing 10, an aluminum alloy can be exemplified. The housing 10 is provided with a first opening 11, a second opening 12, a fixed end 14, and a grounding portion 16.

The first opening 11 is a concave portion having a concave shape provided at one end of a cylindrical or cylindrical housing 10. The first opening 11 has a shape corresponding to the outer shape of the connecting terminal 61, and has a shape into which the connecting terminal 61 can be inserted. In this embodiment, an example in which the inner surface of the first opening 11 is formed in a truncated cone shape will be described.

The second opening 12 is a concave portion having a concave shape provided at the other end portion of the housing 10. The second opening has a shape corresponding to the outer shape of the insulating plug 31 and has a shape into which the insulating plug 31 can be inserted. In this embodiment, an example in which the inner surface of the second opening 12 is formed in a truncated cone shape will be described.

The size and shape of the first opening 11 and the second opening 12 can be appropriately changed according to the shapes of the connecting terminal 61 and the insulating plug 31, respectively. Specifically, at least one of the first opening 11 and the second opening 12 may be formed in a truncated cone shape, or may be formed in another shape. The magnitude relationship between the first opening 11 and the second opening 12 is not limited to the content shown in FIG.

The fixed end 14 is a member arranged on the wall portion 13 that partitions the first opening 11 and the second opening 12 in the housing 10. The fixing end 14 is a member used for fixing the connecting terminal 61 inserted into the first opening 11 together with the bolt 21 and the nut 22. Copper can be exemplified as a material for forming the fixed end 14. The fixed end 14 is provided with a through hole 15 through which the bolt 21 is inserted.

The grounding portion 16 is a portion to which the grounding wire 19 is electrically connected by attaching the grounding wire 19 used for grounding the closing tool 1. The ground contact portion 16 is an outer peripheral surface of the housing 10, and is provided in a region corresponding to the wall portion 13 between the first opening 11 and the second opening 12. The grounding portion 16 is also a portion to which the string portion 36, which will be described later, is attached.

The ground contact portion 16 is a plate-shaped member formed in a trapezoidal shape protruding from the housing 10. The grounding portion 16 is provided with a mounting hole 17 to which the grounding wire 19 is mounted. The ground contact portion 16 may be formed integrally with the housing body 10 or may be formed as a separate body and attached to the housing body 10. As the grounding wire 19, a known wire or cable used for grounding can be used, and the grounding wire 19 is not particularly limited.

The bolt 21 and the nut 22 are members used for fixing the connection terminal 61 inserted into the first opening 11 together with the fixing end 14. As the bolt 21 and the nut 22, the same bolts 75 and nut 76 of the cable 70 described later can be used.

Examples of the material for forming the bolt 21 and the nut 22 include steel which is iron containing carbon as a component, or alloy steel containing nickel, chromium, molybdenum, cobalt, tungsten, vanadium, tantalum and the like as components. can.

The bolt 21 is a member formed only from the shaft portion and having male screws formed at least at both ends of the shaft portion. In the present embodiment, the bolt 21 will be described by applying it to an example in which a male screw is formed on all of the shaft portion.

The nut 22 is a member in which a female screw that can be screwed into the bolt 21 is formed. In this embodiment, the nut 22 will be described by applying it to an example of a hexagon nut. The nut 22 has a size that can be arranged inside the second opening 12. The nut 22 may be a nut other than the hexagon nut, and the shape is not particularly limited.

The insulating plug 31 has an insulating property and is a member arranged in the second opening 12. The insulating plug 31 is a member that protects the bolt 21 and the nut 22 and insulates them from the outside. As the insulating plug 31, the same insulating plug 31 as the insulating plug 77 of the cable 70 described later can be used. As a material for forming the insulating plug 31, an insulating epoxy resin can be exemplified. In this embodiment, the case where the insulating plug 31 is formed in a truncated cone shape will be described.

The cap portion 35 is a lid that closes the opening of the second opening 12, and is a member that prevents foreign matter from entering the inside of the second opening 12. The cap portion 35 may be provided with a string portion 36 to be attached to the attachment hole 17 of the ground contact portion 16.

Next, the configurations of the cable connecting device 50 and the cable 70 to which the fastener 1 is attached will be described with reference to FIGS. 2 and 3.
As shown in FIG. 2, the cable connecting device 50 is a device attached to the wall portion 13. The cable connecting device 50 is provided with a base 51, a conductor 55, and four connecting terminals (connecting portions) 61A, 61B, 61C, and 61D. When it is not necessary to distinguish between the four connection terminals 61A, 61B, 61C, and 61D, it is also simply referred to as the connection terminal 61.

The base portion 51 is a member attached to the wall portion 52, and is also a member provided with connection terminals 61A, 61B, 61C, 61D. A conductor 55 is arranged inside the base 51. Two connection terminals 61A and 61B projecting in the same direction and two connection terminals 61C and 61D projecting in opposite directions are arranged on the base 51.

The conductor 55 is a member formed of a conductive material. The conductor 55 is formed in an H shape having a first portion 56 and a second portion 57 arranged in parallel and a connecting portion 58 connecting the first portion 56 and the second portion 57.

The first portion 56 projects from the base 51 and extends inside the connecting terminal 61A and the connecting terminal 61C. The end portion of the first portion 56 is exposed on the end faces of the connection terminal 61A and the connection terminal 61C.

The second portion 57 projects from the base 51 and extends inside the connecting terminal 61B and the connecting terminal 61D. The end of the second portion 57 is exposed on the end faces of the connecting terminal 61B and the connecting terminal 61D.

The exposed surfaces of the first portion 56 and the second portion 57 are provided with bolt holes 59 used for fixing together with the bolts 21 and 75. The connecting portion 58 is arranged inside the base 51.

The connection terminals 61A, 61B, 61C, and 61D are members used for connecting to the closing tool 1 and the cable 70. The connection terminals 61A, 61B, 61C, and 61D are terminals formed in a convex shape to be inserted into the closing tool 1 or the cable 70, and have a shape corresponding to a known standard. As a known standard, EN50181 of the European standard (European Norm) and the like can be exemplified. In this embodiment, the connection terminals 61A, 61B, 61C, and 61D will be described by applying to an example in which they are formed in a truncated cone shape.

The cable 70 is detachably connected to the cable connecting device 50. As shown in FIG. 3, the cable 70 is provided with a terminal connection portion 71 used for connection with the cable connection device 50. The terminal connection portion 71 is a terminal formed in a concave shape into which the connection terminal 61 of the cable connection device 50 is inserted, and has a shape corresponding to a known standard. As a known standard, EN50181 of the European standard (European Norm) and the like can be exemplified.

In the present embodiment, a tubular member arranged orthogonal to the cable 70, a terminal portion 72 provided with a connection recess 73 having a conical inner peripheral surface corresponding to the connection terminal 61, and a cable 70. Insulates the connection terminal 74, which is conductive to the conductor and is exposed on the end face of the connection recess 73, the bolt 75 corresponding to the bolt hole 59 of the cable connection device 50, the nut 76 corresponding to the bolt 75, and the bolt 75 and the nut 76. The insulating plug 77 that can cover the bolt 77 and the insulating plug 77 that can be covered will be described by applying to an example provided in the terminal connection portion 71.

Next, the connection of the cable connecting device 50, the closing tool 1, and the cable 70 having the above configuration will be described with reference to FIG. FIG. 4 shows a state in which three cables 70 and one fastener 1 are connected to the cable connecting device 50. Specifically, it shows a state in which the cable 70 is connected to the connection terminals 61A, 61B, 61C and the closing tool 1 is connected to the terminal 61D.

Here, a case where the cable 70 is connected to the connection terminal 61A will be described. The case where the cable 70 is connected to the connection terminals 61B and 61C is the same as the case where the cable 70 is connected to the connection terminals 61A, and thus the description thereof will be omitted.

First, the connection terminal 61A is covered with the terminal connection portion 71. Specifically, the connection terminal 61A is inserted into the connection recess 73 of the terminal portion 72. After that, the bolt 75 is screwed into the bolt hole 59, and the terminal connection portion 71 is fixed to the connection terminal 61A.

Next, a case where the closing tool 1 is connected to the connecting terminal 61D will be described. First, the housing 10 is put on the connection terminal 61D. Specifically, the connection terminal 61D is inserted into the first opening 11 of the housing 10.

After that, the bolt 21 is screwed into the bolt hole 59, and the nut 22 is screwed into the bolt 21. As a result, the closing tool 1 is fixed to the connecting terminal 61D. The fastener 1 may be fixed to the connection terminal 61D by omitting the nut 22 and screwing the bolt 21 into the bolt hole 59. The insulating plug 31 is fitted into the second opening 12, and the opening of the second opening 12 is closed by the cap portion 35.

According to the closing tool 1 having the above configuration, the conductor 55 and the fixed end 14 are fixed by the bolt 21 and the nut 22. In other words, the connection terminal 61 of the cable connection device 50 and the housing 10 of the closing tool 1 are fixed. Compared to fixing by other methods, the fixing is less likely to loosen due to vibration and impact, making it easier to use for railroad vehicles.

Since the conductor 55 and the fixed end 14 are fixed by using the bolt 21 and the nut 22, it is not necessary to rotate the housing 10 of the closing tool 1 at the time of fixing. Further, when tightening the bolt 21 into the bolt hole 59 of the conductor 55, it is possible to control the degree of tightening by using a tool. In other words, the closing tool 1 can be firmly attached to the cable connecting device 50.

Since the housing 10 and the bolt 21 are separated from each other, there is no possibility that the housing 10 and the bolt 21 will be separated from each other as compared with the case where the housing 10 and the bolt 21 are integrally formed. In addition, there is no possibility that the portion of the housing 10 embedded in the bolt 21 will be damaged.

The attachment configuration of the closing tool 1 to the cable connection device 50 is the same as the attachment configuration of the terminal connection portion 71 of the cable 70 to the cable connection device 50. For example, the bolt 21 and nut 22 of the fastener 1 and the bolt 75 and nut 76 of the cable 70 can be the same. Therefore, the same tool can be used for mounting the closing tool 1 and the terminal connection portion 71, and the mounting work procedure can be shared.

Further, the structure and specifications related to the insulation of the housing of the closing tool 1 and the structure and specifications related to the insulation of the connection terminal 74 of the cable 70 can be the same. Therefore, the electrical insulation performance of the closing tool 1 and the terminal connection portion 71 can be made equivalent.

By connecting the cap portion 35 and the grounding portion 16 with the string portion 36, for example, even if the cap portion 35 is separated from the housing 10, the cap portion 35 is less likely to be lost. Further, the cap portion 35 is less likely to be lost when the closing tool 1 is attached to or removed from the cable connecting device 50.

By providing the grounding portion 16 in the region corresponding to the wall portion 13 on the outer peripheral surface of the housing 10, it is easy to increase the resistance force of the grounding portion 16 to an external force as compared with the case where the grounding portion 16 is provided in another region. Since the grounding wire 19 and the string portion 36 are attached to the grounding portion 16, an external force is likely to be applied to the grounding portion 16. Further, since it is provided so as to protrude from the housing 10, it is easy to collide with the outside and an external force is easily applied. By providing the grounding portion 16 in the above-mentioned region, it becomes easy to increase the resistance force against the above-mentioned external force, and it becomes difficult to break.

The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above-described embodiment, the cable connecting device 50 to which the closing tool 1 is connected has been described by applying it to the device having the configuration shown in FIG. 2, but the configuration of the cable connecting device to which the closing tool 1 is connected is described. The configuration may be other than the configuration shown in FIG. 2, and is not limited thereto.

1 ... Closure, 10 ... Housing, 11 ... 1st opening, 12 ... 2nd opening, 13 ... Wall, 14 ... Fixed end, 16 ... Grounding part, 19 ... Grounding wire, 21 ... Bolt (fixing part) , 22 ... Nut (fixed part), 31 ... Insulation plug, 35 ... Cap part, 36 ... String part, 61A, 61B, 61C, 61D ... Connection terminal (connection part)

Claims (4)

A closure that is attached to the convexly formed connection of the cable connection device.
A first opening having a concave shape into which the connection portion can be inserted, a second opening having a concave shape in a region opposite to the insertion direction of the connection portion, and the first opening. A housing having a fixed end arranged on a wall portion between one opening and the second opening, and a grounding portion to which a grounding wire is connected.
A fixing portion for fixing the connecting portion inserted into the first opening and the fixing end,
A closing tool for a cable connecting device provided with an insulating stopper having an insulating property arranged in the second opening. The fixing portion has a bolt inserted into the fixing end and a nut screwed into the bolt.
The first aspect of the bolt, wherein the end of the bolt on the first opening side is screwed into a bolt hole formed in a conductor of the connecting portion, and the nut is screwed on the second opening side. Closure for cable connection devices. A cap portion that closes the opening of the second opening and
A string portion in which one end is attached to the grounding portion and the other end is attached to the cap portion.
The closing tool for the cable connecting device according to claim 1 or 2, wherein the cable connecting device is provided. The grounding portion is any one of claims 1 to 3 provided on the outer peripheral surface of the housing and in the region corresponding to the wall portion between the first opening and the second opening. Closing tool for the cable connection device described in the section.

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