JPH0221582A - Electric shock prevention device of connector at branch of low tension main line - Google Patents

Abstract

PURPOSE:To prevent an electric shock and make it easy to change the connection of a connector at the load side by integrally installing a power-side connector at a main cable and also providing a shirt at the tip of the lower-side connector such that the skirt is projected from there. CONSTITUTION:A branch line is taken off from a prescribed place of a cable 1 through a branch section, and a skirt 38 with a prescribed length is provided at the tip of the power-side connector 30, and the exposed part of the connector 30 is covered with the skirt 38. A feeder 21 is connected to a load-side connector 40, and to a demand-side equipment through a transformer or directly so that power can be fed. Thus, safety can be improved and it is possible to carry out wiring work in a building with ease.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a branching device used for supplying power to each floor from a low-voltage main line arranged in an electric shaft such as a pill, and in particular, By providing a protruding flexible skirt to cover the connector, it is possible to prevent accidents such as inadvertent contact with the live power supply side connector. Main line branch connector! ! This invention relates to an i-electronic prevention device.

(Prior Art) In buildings such as office buildings that use a large amount of electric power, flat cables and the like, which have a large capacity of power transmission lines and a large power transmission capacity, are often used.

When branching a power supply line from a low-voltage main line using such a power transmission line to each floor, for example,
Branching means such as that shown in Japanese Patent No. 574 is often used.

As a conventional power feeder branching means as described above, the fourth
The branch connection method as shown in FIG. 5 or FIG. 5 is used.

For example, as shown in Fig. 4 and Fig. 4a, in the case of a method of connecting branch lines using a branch sleeve, the insulating member as a covering of the main cable is peeled off to expose the conductive wire, and the conductive wire is exposed. The branch sleeve 10A is fixed so as to cover the branch line, and the end of the branch wire is connected to a connecting plate 18 formed to protrude from the branch sleeve 10A to the side.

Apart from this, a connection method as shown in FIG. 5 may be used. In the connection method shown in FIG. 5, the insulating member of the main cable 1 is removed and the branch sleeve IOB is fixed to the exposed portion 4 of the conductive wire 2. By integrally attaching the conductor 19a of one line, the branch line 19 can be directly connected.

Then, connect the branch lines through the branch sleeve as described above, insulate them by wrapping insulation tape, etc. around them, and fix the branch lines as needed. I can do it.

As a method of connecting branch lines as described above, the example shown in FIG. 4 is often used.
There is an example as shown in Japanese Utility Model Application Publication No. 58-141573.

(Problem to be solved by the invention) However, in the conventional low-voltage main line branch connector device as described above, the branch lines for supplying power to each floor of the building are Since the equipment is installed according to the amount of electricity used, as more office automation equipment is used in response to the recent shift to office automation, the amount of electricity used in the office space increases dramatically. Problems arise, such as the fact that branch lines cannot meet the power demand.

Therefore, in the event of a lack of capacity as described above, it is necessary to remove the small-capacity branch line fixed to the main cable from the main cable and connect a new high-capacity branch line. become. However, the branch lines connected to the conventional main cable are fixed in such a way that they cannot be easily removed, and in order to do the work, it is necessary to use insulating materials such as insulating tape that covers the conductor 12. It is necessary to remove the branch line, remove the branch sleeve at the connection part, and fix the new high-capacity branch line.

However, the above-mentioned work cannot be carried out while the main cable is energized, and of course there will be a power outage during the work. In addition, such as in an office building, when the amount of electricity used on a floor changes each time a company moves, or when the location of OAR devices on each floor changes due to the movement of internal sections, etc. It is necessary to install a power supply line with a capacity corresponding to this.

As mentioned above, the work to increase the capacity of the branch line cannot be done while the line is live, so naturally the work will have to be carried out on holidays, etc. However, if the building has a large number of 71 cores, In addition, the number of branch lines to be installed corresponding to each floor increases, and in addition to requiring a lot of manpower for construction, the old branch lines are removed, new branch lines are connected, and insulating materials are required for them. It is required to carry out many troublesome construction works such as construction work. In general, electrical shafts in ordinary buildings are often constructed with relatively little space, and carrying out construction in such narrow spaces poses problems such as very poor work efficiency. be.

In addition, according to the conventional branch line drawing method described above, the connector drawn out from the branch part may be placed in an exposed state, making it difficult for the work opening etc. to accidentally touch the connector. There is a risk of electric shock, etc.

(Object of the Invention) The present invention solves the above-mentioned drawbacks of the conventional low-voltage trunk line branch connector, and improves safety by providing a protruding skirt on the power supply side connector branching from the trunk cable. It is an object of the present invention to provide an electric shock prevention device for a connector at a low-voltage trunk line branch, which makes it possible to easily change the connection of the connector at the branch, and to facilitate wiring work within a building. It is said that

(Means and effects for solving the problems) The present invention has the following features:
The insulating member of the main cable is peeled off to expose the conductive wire, a substantially ring-shaped branch sleeve is integrally provided to cover the exposed portion of the conductive wire, and the branch sleeve is covered with an insulating member and a protective cover. a branch part is formed, a power supply side connector is provided from the branch part via a branch line, a skirt is provided to protrude from the tip of the power supply side connector, and when a load side connector is attached to the connector, This device is configured so that both connectors can be connected by pressing the skirt.

Therefore, in the electric shock prevention device for a low voltage main line branch connector of the present invention, the power supply side connector is covered by the skirt, and accidents such as electric shock due to inadvertent contact with a live connector can occur. It is possible to prevent this, and to easily perform work such as changing the connection of the connector on the load side.

By using the low-voltage main line branching device of the present invention, even when rewiring is performed in response to the power demand on each floor within a building, connections to the main cable can be simply made at the branch section of the main cable. For the power supply side connector,
Since it is only necessary to insert the connector of the power supply line, it is possible to safely connect a large capacity rectangular tube side cable to a live trunk cable without interrupting the power transmission.

(Example) The configuration of the electric shock prevention device for a connector of a low-voltage trunk line branch portion of the present invention will be explained according to the illustrated example.

The trunk cable 1 of the present invention is constructed as shown in FIG. 1, and a branch line 20 is drawn out from a predetermined location of the cable 1 via a branch part, and a power supply side connector 30 is connected to the end of the branch line 20. It is set up.

Furthermore, the cables shown in the embodiments of the present invention are cables of a type usually called flat cables (for example, 600V cables).
A single-core cross-linked polyethylene insulated vinyl sheath flat cable is used.

At the tip of the power supply side connector 30 of the present invention described above,
A skirt 38 having a predetermined length is provided, and the exposed portion of the connector 30 is covered by the skirt 38.

In addition, in the device of the present invention, the skirt provided to cover the opening from the end of the connector is E.
Made of material with appropriate hardness, such as P rubber,
The construction is made so that workers, etc. do not accidentally put things into the opening. When the load-side connector is inserted from the tip of the skirt, the tip of the skirt and the rubber cover of the load-side connector are connected to cover the connecting portion.

Further, a power supply line 21 is connected to the load side connector 40, and the power supply line 21 is configured to be connected to a demand side device via a transformer or directly to supply power.

For example, in the case where the branch part of the present invention having the above-mentioned configuration is arranged on an electric shaft inside a building and supplies power to the power supply line arranged on each floor, the branch part of the present invention has a position corresponding to each floor of the building. If the trunk cable 1 is a three-phase AC, a branch part is formed in each of the three trunk cables or four cables arranged in parallel. By combining these lines, you can obtain the necessary power.

The connector shown in FIG. 2 is an example of a case where the power supply side connector and the load side connector of the present invention are connected and used.

In the example of the connector shown in FIG. 2, the connector 30 on the power supply side has a receptacle 31 in its center.
A fixed cylinder 32 is provided around the receiver 31, and a rubber cover 35 is placed around the fixed cylinder 32.

Further, an arc extinguisher 33 is provided on the opening side of the fixed cylinder 32, and this arc extinguisher is made of a synthetic resin material with high insulation performance such as polyacetal resin, and is connected to the receiver 31 and the load side connector 40. When connecting and separating from the plug 41,
It is used to ensure that even if an arc occurs, it will not affect the surroundings.

Furthermore, in the connector 30 of the present invention, a rubber cover 35 is provided so as to cover the fixed cylinder 32, and the skirt 38 is made to protrude greatly by further extending from the tip of the cover 35. It is set up. The skirt 38 covers the opening of the connector and prevents external objects from coming into contact with the current-carrying part.

The above-mentioned rubber cover 38 can be formed into any shape, but if it is formed into a shape that slightly expands toward the light as shown in the figure, when inserting the load-side connector 40, It is also possible to easily push back the skirt to facilitate attachment of the connector 40.

The cover 38 can also be formed into a bellows shape, and by forming the bellows-like portion up to the center of the power supply side connector, the cover 45 of the load side connector 40 can be formed as described below. It is possible to maintain good workability when attaching the parts around the fixed cylinder.

As described above, the load side connector 40 provided corresponding to the power supply side connector includes a plug 41 as described above and an arc extinguisher 43 fixed to the tip of the plug 41.
and a freely rotatable screw member 4 at the base of the plug 41.
4, and a rubber cover 45 is provided to cover each of these members.

Note that an arc extinguisher 43 provided at the tip of the plug 41
The arc extinguisher 33 can be made of the same material as the arc extinguisher 33 provided in the connector 30, and the two arc extinguishers can prevent the arc when the receptacle and the plug come into contact and separate from each other in the narrow gap inside the cylinder. To perform an arc extinguishing action to prevent the arc from leaking to the outside.

゛When attaching the load side connector 40 to the power supply side connector 30, first
The skirt 38 is pressed by the connector 40 to expose the opening of the connector 30, and the arc extinguisher 43 at the tip of the plug 41 is inserted toward the receptacle 31 of the connector 30.

In the embodiment of the present invention, the power supply side connector 30 has a distance L1 between the tip of the receptacle 31 and the insertion side tip of the cylinder 32, and a length L2 of the plug 41 of the load side connector.
is formed in the relationship Ll>12. Therefore, while the plug 41 is inserted toward the receptacle 31, the arc extinguisher 43 provided at the tip of the plug 41 is engaged with the receptacle 31, and the conductors of both are directly connected. Since there is no power, it will not be in a energized state.

After the plug is inserted in the above-described state, the screw member provided at the rear of the plug 41 is freely rotated with respect to the plug body, and is inserted into the female thread 34 provided at the tip of the fixed cylinder. During the screwing operation, the plug 41 is inserted into the receptacle 31, and both become energized.

In addition, when setting the energized state as described above, even if an arc occurs between the connected conductors, the arc is extinguished inside the cylinder that is set in a sealed state, so it will not leak to the outside. will be completely prevented.

Then, as described above, by completely screwing the screw member 44 into the female thread 34, both are completely fixed and it becomes possible to ensure the energized state. In addition, when attaching the connector described above, since the screw member 44 can freely rotate around the plug 41, the load side cable will not be twisted even if the screw member 44 is rotated, and the plug will not be twisted. Only the operation of deeply inserting into the interior of the receptor 31 is performed.

After the fixing operation, the cover 45 of the load side connector 40 is moved relative to the fixed cylinder 32 so as to be in contact with the end of the power supply side connector 30, and the cover 45 of the load side connector 40 is moved by the two rubber covers 35, 45. Seal the connections.

In the illustrated embodiment, the covers 35 and 45 are formed to have a slightly smaller diameter than the outer diameter of the cable and the fixed cylinder 32, and furthermore, the covers 35 and 45 are formed to have a slightly smaller diameter than the outer diameter of the cable and the fixed cylinder 32. Ring-shaped grooves 36 and 46 are provided in the covers of the movable parts, respectively, and by storing silicone grease in the grooves, the covers can be smoothly slid and It is possible to obtain the water nectar performance. Therefore, in the connector part of the present invention, by covering the periphery of the main body with a rubber cover, it is possible to completely seal the connection portion.

Forming a branch part in the trunk cable of the present invention can be performed, for example, as shown in FIG. 3. In the example shown in FIG. 3, the insulating member 3 covering the conductor 2 at a predetermined portion of the trunk cable 1 is peeled off to form an exposed portion 5 of the conductor (copper conductor) 2; A bifurcated branch sleeve 10 made of steel casting or the like is attached to the exposed portion, and with the end of the branch line 20 inserted into the side of the sleeve 10, tightening from the periphery allows 3. The two members are crimped and fixed.

After that, the area around the exposed portion of the conductor and the live part are covered with self-adhesive insulating tape such as vinyl tape, and then covered with a protective cover 7 such as a heat shrink tube. This protects the branch. Further, by wrapping an insulating tape around the end of the protective cover, the branch part is completely sealed.

In addition, in the embodiment shown in FIG. 3 above, the power supply side connector 30 is provided with a skirt protruding from the tip on the opening side of the connector, similar to the one shown in FIG. A two-pronged member (Y branch connector) 25 is provided on the side connector 40, and two power supply lines 21.
21a can be supplied with power.

In this way, as a terminal on the demand side, it is possible to connect any number of power supply lines to one load side connector, and in addition to this, the load When the current carrying capacity of the side connector is small, it is also possible to interpose a reducer between the two connectors so that power can be supplied in accordance with the capacity of the feeding Ti line.

Furthermore, in the device of the present invention, not only the structure shown in the embodiments can be used as the branch sleeve, but also sleeves of any other shape can be used.

In addition, the skirt that protrudes from the tip of the power supply side connector can be configured in any shape, material, etc., and after connecting two connectors, the skirt can be used to connect the load side connector. It is also possible to provide it so as to cover the surrounding area.

In addition, for the trunk cable of the present invention as described above,
The work of installing branch sections is as follows: - [This can also be done at the incident site, but the cables are manufactured in a factory according to the specifications of the building, and the cables are transported to the construction site, attached to the building's electrical shaft, and installed on each floor. If the load side connectors are connected in sequence, the construction work on site can be greatly simplified.

In the embodiments of the present invention described above, an example is given in which the load-side connector can be easily connected to a flat type cable or pull that is often used in general office buildings. As described above, the branching device of the present invention is not only applicable to flat cables as described above, but also to cables having a general round cross section. Is possible.

In that case, the shape of the branch sleeve is configured to match the cross section of the cable, and the branch connector is fixed to the cable by means such as crimping the branch connector integrally with the branch sleeve, and the cable is supplied with power from the sleeve. By providing the side connectors in a protruding manner, the branch portion can be easily formed.

(Effect of the invention) Low pressure 9' of the invention? Since the electric shock prevention device for the connector at the line branch section has the above-mentioned configuration, the opening of the power supply side connector is not exposed, preventing accidents such as inadvertent electric shock to workers. It can be prevented from occurring.

Further, the trunk line branching device of the present invention is 9? By providing the power supply side connector integrally with the line cable, 0? ! Line cables can be easily prefabricated, and work such as installing power supply side connectors at arbitrary locations can be done at the factory in accordance with the specifications of the building, etc.

In addition, when the power demand for a cable installed in a building increases, it can be easily handled by reconnecting a power supply line connector with a different current carrying capacity to the power supply side connector.

In addition, when changing the capacity ω of the feeder line on each floor where the main cable is installed, it is sufficient to simply connect the power feeder line with human characteristics without changing the branch sleeve for the main cable. 9? Construction work can be carried out even when the cable is energized.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the configuration of an electric shock prevention device for a low-voltage trunk branch connector according to the present invention, FIG. 2 is a sectional view showing the configuration of the connector according to the present invention, and FIG. 3 is another embodiment of the present invention. Figures 4 and 4a are explanatory diagrams showing the configuration of the individual parts, and Figures 4 and 4a show an example in which a conventional branch sleeve is used, and Figure 5 is an explanatory diagram of a conventional example in which a branch line as a power supply line is directly connected. be. Symbols in the diagram

Claims (1)

[Claims] The insulating member of the main cable is peeled off to expose the conductive wire, a substantially ring-shaped branch sleeve is integrally provided to cover the exposed portion of the conductive wire, and the branch portion is covered with the insulating member and the conductive wire. A branch is formed by covering with a protective cover, a power supply side connector is provided from the branch via a branch line, a skirt is provided to protrude so as to cover the tip of the power supply side connector, and a load side connector is connected to the connector. 1. An electric shock prevention device for a connector of a low-voltage main line branch, characterized in that the connector is configured to connect both connectors by pushing the skirt when the connector is attached.