JP4381549B2 - Waterproof branch connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a waterproof branch connector that connects a low-voltage trunk line that supplies power and a branch line that branches from the low-voltage trunk line and supplies power to a low-voltage consumer.
[0002]
[Prior art]
In recent years, work to embed electric wires in the ground has been carried out, and it is necessary to proceed with this work even in areas with low load density of power supply. If the low-pressure supply is performed in the same manner as the conventional supply method to the high load density area, the cost is increased and the burden on the power supplier is increased. Therefore, a method of omitting the conventional low-voltage branching device, drawing the low-voltage trunk line directly from the transformer through a conduit, and connecting to the low-voltage consumer by connecting with a branch connector is inexpensive and is selected.
[0003]
[Problems to be solved by the invention]
However, to connect a branch line to a low-voltage trunk line using a waterproof connector often used in a branch connector, first turn the low-voltage trunk line back, strip off the low-voltage trunk line, and cover the same. Because it was necessary to fit the peeled branch line and fit it in the sleeve, then compress the sleeve with a hydraulic press etc., cover it with a waterproof cover, and wind it with tape to give it waterproof treatment. It is cumbersome, time consuming and laborious, and requires a wide branch fold.
[0004]
The present invention was made in view of these points, and does not require equipment such as a hydraulic press, and can easily, reliably and safely connect the low-voltage trunk line and the branch line without removing the coating of the low-pressure trunk line, Furthermore, the above-described problems are solved by providing a branch connector having waterproofness.
[0005]
[Means for Solving the Problems]
The present invention includes a grip body having a substantially U-shaped cross section and a connecting body that is fitted into the grip body and connects branch lines, and the connection body includes an elastic substantially rectangular parallelepiped insulating cover and the insulating cover. A screw plate with a through screw hole in the center of the upper surface placed on the upper surface of the upper surface of the insulating cover, provided with a substantially rectangular parallelepiped hollow portion having a lower end opened inside the insulating cover, on one side of the insulating cover, An insertion portion of a substantially cylindrical branch line having an insertion hole connected to the hollow portion is provided, a through hole connected to the hollow portion is drilled at the substantially upper center of the insulating cover, and moved downward to the upper portion of the hollow portion Place a free downward channel-shaped presser fitting, insert a leaf spring inside the groove of the presser fitting, insert and hold the low-pressure trunk line into the U-shaped back of the gripping body, and peel off the sheath Insert the core wire from the insertion part of the insulation cover into the insertion hole. A cut-through blade made of a conductive material having a downward channel shape is inserted from the opening at the lower end of the insulating cover, inserted into the hollow portion and inserted below the leaf spring inside the groove of the presser fitting, and the connection body. Is inserted into the U-shape from above the gripping body, the screw plate placed on the upper surface of the insulating cover of the connection body is locked to the gripping body, and the hanging part is an insulating material in the through screw hole of the screw plate. The bolt made of is screwed and tightened so that the hanging portion is inserted through the through hole of the insulating cover, the pressing metal is pressed and moved downward, and the branch line is moved by pressing the pressing metal and the leaf spring. Move, along with this, press the cut-through blade to move downward, stab the cut-through blade into the core from above the low-pressure trunk coating, and electrically connect the low-pressure trunk and the branch line, This cut A portion narrowing stab to the coating of the low-pressure mains Lou blade was waterproof branch connector was isolated from the outside suffered by the lower edge of the insulating cover.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a state in which a low-voltage trunk line A and a branch line B are connected using a waterproof branch connector 1 according to an embodiment of the present invention. The grip body 2 is configured to grip the low-pressure trunk line A, and the connection body 3 is fitted into the grip body 2 to connect the low-pressure trunk line A and the branch line B.
As shown in FIGS. 2 and 3, the gripping main body 2 is made of a metal material or a resin material having a substantially U-shaped cross section, and when the connection body 3 is fitted into the upper portions of both the side portions 2 a and 2 a, respectively. , Penetrating locking holes 2b and 2b for locking and fixing the connecting body 3 are provided.
[0007]
The connecting body 3 is generally shown in FIG. 4, and includes a rubber cover 3a shown in FIG. 5, a holding metal fitting 4 shown in FIG. 6, a leaf spring 5 shown in FIG. 7, and a cut-through blade made of a conductive material shown in FIG. 6, rubber cover reinforcing metal fitting 7 shown in FIG. 9, screw plate 8 shown in FIG. 10, and fastening bolt 9 shown in FIG.
As shown in FIG. 5, the rubber cover 3a made of an insulating material has a shape in which a cylinder is attached to one side of a rectangular parallelepiped, and a rectangular parallelepiped hollow portion 3b having an open lower end is provided in the rubber cover 3a. A through-hole 3c that reaches the hollow portion 3b is formed in the central portion of the upper surface of the cover 3a, and a horizontal cylindrical branch line insertion portion 3d is provided on one side surface. The hollow hole of the branch line insertion part 3d is an insertion hole 3e, and the inner part is connected to the hollow part 3b. When the branch line B is inserted into the outer periphery of the outer end of the branch line insertion part 3d, A fastening band 3f for fastening by fastening is provided (see FIG. 4).
[0008]
The lower surface of the rubber cover 3a is formed with a lower end surface of the rubber cover 3a so as to seal a contact portion between the low pressure main line A and the cut-through blade 6 when the connecting body 3 is fitted into the holding body 2 holding the low pressure main line A. It has a curved shape in close contact with the low-voltage trunk line A. On the upper part in the rectangular parallelepiped hollow portion 3b, a downwardly-shaped channel-shaped pressing metal fitting 4 shown in FIG. 6 having a plane substantially the same size as the cross section of the hollow portion 3b is provided on the outer periphery of the hollow portion 3b. Due to the elasticity of the rubber cover 3a that forms the contact portion, the rubber cover 3a is closely fitted into the hollow portion. 8 is inserted into the groove of the holding metal fitting 4 with the leaf spring 5 bent at two places shown in FIG. 7 and the branch line B inserted later inserted therebetween. The lower end portions of the cut-through blade 6 are positioned inside the lower end portions of the presser fitting 4.
[0009]
Further, the upper surface of the rubber cover 3a is covered with a substantially channel-type rubber cover reinforcing bracket 7 which covers the upper surface and the other side surface shown in FIG. A through hole 7a is bored in the center of the same as the rubber cover 3a. Further, on the upper surface of the rubber cover reinforcing metal member 7, a screw plate 8 having a through screw hole 8a penetrating through the central portion of a rectangular flat plate shown in FIG. Projection pieces 8b and 8b that are engaged with the respective engagement holes 2b of the gripping body 2 are provided at the center of each. Further, a tightening bolt 9 shown in FIG. 11 is screwed into the through screw hole 8a. The hanging portion of the tightening bolt 9 has an upper half that is a threaded portion 9a and a lower half that is an insulating round bar. 9b, and the portion of the insulating round bar 9b is inserted into the through hole 7a of the rubber cover reinforcing bracket 7 and the through hole 3c of the insulating cover 3a.
[0010]
Next, a method of connecting the branch line B to the low-voltage trunk line A using the waterproof branch connector 1 will be described with reference to FIGS.
First, the covering of the portion to be connected in the low-voltage main line A is cleaned. Thereafter, the gripping main body 2 is inserted into the cleaned portion of the low-pressure main line A from above the both side portions 2a from the U-shaped back. Then, the covering of the tip of the branch line B to be connected is stripped for a certain length, until the core wire at the tip of the branch line B hits the side surface at the back of the hollow part 3b from the insertion hole 3e of the branch line insertion part 3d of the connection body 3. Plug in. At this time, the bent leaf spring 5 inside the groove of the presser fitting 4 is located above the core wire from which the coating of the branch line B is peeled off. Thereafter, a cut-through blade 6 having a downward channel shape is fitted through the opening at the lower end of the rubber cover 3a. In this state, the lower end portions of the cut-through blade 6 are located below the lower end portions of the presser fitting 4.
[0011]
Thereafter, the connection body 3 with the core wire of the branch line B inserted is inserted into the gripping body 2 so as to press the low-pressure trunk line A inside the U-shape of the gripping body 2 from above. Then, the screw plate 8 placed on the upper surface of the connection body 3 is locked and fixed to the grip body 2 by fitting the protruding pieces 8 b on both sides of the screw plate 8 into the lock holes 2 b of the grip body 2. Then, the tightening bolt 9 is tightened with a specified torque, the holding metal 4 in the hollow portion 3b is pressed from above with the hanging part of the tightening bolt 9, and the bent leaf spring sandwiched between the holding metal 4 and the branch line B 5 and further press the pressing metal 4, the leaf spring 5, the core wire of the branch line B, and the cut-through blade 6 in this order, and cover the blade of the cut-through blade 6 that is in direct contact with the branch line B with the low-pressure trunk A The low-voltage trunk line A and the branch line B are electrically connected by biting into the core part inside from above. In this state, the lower end edge of the rubber cover 3 covers the portion where the cut-through blade 6 is inserted into the coating of the low-pressure trunk line A. Thereafter, the tightening band 3f of the branch line insertion portion 3d of the connection body 3 is tightened so that the inserted branch line B is not separated.
[0012]
In the above embodiment, the substantially U-shaped gripping body 2 is made of a metal material or a resin material, but the material is not particular to these materials. The connecting body 3 includes the rubber cover reinforcing bracket 7, the leaf spring 5, and the screw plate 8, and the protrusions 8 b provided on both sides of the screw plate 8 are provided on both sides 2 a and 2 a of the grip body 2. Although fixed to the blind holes 2b and 2b, these configurations are not essential requirements of the present invention. Moreover, although the presser metal fitting 4 is stopped and arranged in the hollow part 3b by the elasticity of the rubber cover that forms the hollow part 3b in the connection body 3, the method of arranging the presser metal fitting 4 in the hollow part 3b is as follows. However, the present invention is not limited to this. Further, although the rubber cover 3a is used as the insulating cover, the insulating cover is not limited to the one made of rubber, and may be made of another insulating elastic material.
[0013]
【The invention's effect】
As described above, according to the present invention, the branching operation from the low-voltage trunk line to the branch line can be branched and connected from above the low-voltage trunk line coating, the trunk line stripping work, the work of connecting the trunk line and the branch line with a compression tool, and The taping operation of the connection portion is not required, and the operation is simplified, and the work time and the work space are greatly shortened and omitted. Therefore, live line connection is also possible. Further, the repair work when the branch connector of the present invention is moved can be easily performed by simply winding the tape around the piercing trace of the cut-through blade of the low-pressure trunk line. Furthermore, since the branching portion can be made compact, it is possible to make a large number of lines in the past, or to reduce the diameter of the pipe to be embedded, and to facilitate the embedding work. As a result, branching work can be performed at low cost, which is very convenient. In addition, cover the tip of the branch line, the cut-through blade, and the connection point on the low-voltage trunk line with an insulating insulating cover, and cover the part where the cut-through blade is inserted into the low-voltage trunk line with the above-mentioned insulation cover and seal it. As a result, it is highly waterproof.
[0014]
Furthermore, according to the present invention, since the cut-through blade made of the downward channel-shaped conductive material is provided inside the holding metal via the leaf spring, when the fastening bolt is tightened, the portion where the covering of the branch line is peeled off Can be reliably pressed and held, and the cut-through blade can be reliably pressed down.
[Brief description of the drawings]
FIG. 1 is a front sectional view of a state in which a low-voltage trunk line and a branch line are connected using a waterproof branch connector according to an embodiment of the present invention.
FIG. 2 is a front view of a gripping main body of a waterproof branch connector according to an embodiment of the present invention.
FIG. 3 is a side view of a grip body of a waterproof branch connector according to an embodiment of the present invention.
FIG. 4 is a perspective view of a connection body for a waterproof branch connector according to an embodiment of the present invention.
FIG. 5 is a perspective view of a rubber cover of a connection body of a waterproof branch connector according to an embodiment of the present invention.
FIG. 6 is a perspective view of a presser fitting for a connection body of a waterproof branch connector according to an embodiment of the present invention.
FIG. 7 is a perspective view of a leaf spring of a connection body of a waterproof branch connector according to an embodiment of the present invention.
FIG. 8 is a perspective view of a cut-through blade of the connection body of the waterproof branch connector according to the embodiment of the present invention.
FIG. 9 is a perspective view of a rubber cover reinforcing metal fitting for a waterproof branch connector connection body according to an embodiment of the present invention.
FIG. 10 is a perspective view of a screw plate of a connection body of a waterproof branch connector according to an embodiment of the present invention.
FIG. 11 is a perspective view of a fastening bolt of a connection body of a waterproof branch connector according to an embodiment of the present invention.
FIG. 12 is a side cross-sectional view of a state where the low-voltage trunk line and the branch line are connected using the waterproof branch connector according to the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Waterproof branch connector 2 Grasping body 2a Side part 3 Connection body 3a Rubber cover 3b Hollow part 3c Through hole 3d Branch line insertion part 3e Insertion hole 4 Holding metal 5 Leaf spring 6 Cut-through blade 8 Screw plate 8a Through screw hole 9 Tightening Bolt 9b Insulated round bar A Low-voltage trunk line B Branch line

Claims (1)

It consists of a grip body with a substantially U-shaped cross section and a connection body that fits into the grip body and connects the branch line. The connection body is mounted on an elastic substantially rectangular parallelepiped-shaped insulating cover and an upper surface of the insulating cover. A screw plate having a through screw hole at the approximate center of the top surface, and a hollow portion having a substantially rectangular parallelepiped shape with a lower end opened inside the insulating cover. A substantially cylindrical branch line insertion portion having a connected insertion hole, a through-channel connected to the hollow portion at the center of the upper surface of the insulating cover, and a downward channel freely movable downward at the upper portion of the hollow portion Place a shaped holding bracket, insert a leaf spring inside the groove of this holding bracket, insert and hold the low-pressure trunk line into the U-shaped back of the gripping body, and insulate the core wire of the branch line with the sheath removed From the insertion part of the cover to the insertion hole and hollow part A cut-through blade made of a conductive material having a downward channel shape is fitted into the opening of the lower end of the insulating cover and inserted below the leaf spring inside the groove of the presser fitting, and the connection body is inserted into the grip body. The screw plate placed on the upper surface of the insulating cover of the connection body is engaged with the gripping main body, and a bolt whose hanging portion is made of an insulating material is inserted into the through screw hole of the screw plate. Screw and tighten to insert the hanging part through the through hole of the insulating cover, press the pressing metal and move it downward, and move the branch line by pressing the pressing metal and the leaf spring. Accordingly, the cut-through blade is pressed and moved downward, and the cut-through blade is inserted into the core wire from above the low-pressure trunk line to electrically connect the low-pressure trunk line and the branch line. Low A portion narrowing stab to coating trunk, characterized in that blocked the outside suffered by the lower edge of the insulating cover, waterproof branch connector.

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