JPH04102515U - Connection structure of terminal to bushing - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a terminal connection structure that allows terminals to be easily connected without requiring physical strength. [Configuration] With the mounting member 17 rotated to the open position,
When the character-shaped terminal 21 is held and connected to the bushing 12 and the mounting member 17 is rotated to the tightening position, the mounting member 17 prevents the terminal 21 from falling off even if the terminal 21 is released.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is related to the connection structure of the terminal to the bushing. A structure for connecting power distribution line terminals to bushings installed in power distribution equipment. It is related to

0002

[Conventional technology]

Conventionally, the connection structure of this type of terminal is shown in Fig. 5. . A bushing 33 is provided on the lower surface of the casing 32 of this switch 31. A male thread 33a is formed at the outer end of the bushing 33. The male screw 33a has a The nut 35 is screwed together while holding the attachment ring 34, and the attachment ring 34 has a pair of A stud bolt 36 (only one is shown) is provided upright. Both stud bolts 36 The tip of the terminal is inserted into the hole of the mounting plate 38 provided on the head of the L-shaped terminal 37. and is tightened with a nut 39 from the opposite side. As a result, the L-shaped terminal 37 It is pressed against the bushing 33 side to prevent it from falling off.

0003 When connecting the L-shaped terminal 37 to the bushing 33, the nut 3 At 9, fix the mounting ring 34 to the L-shaped terminal 37 via the stud bolt 36, Hold the terminal 37 by hand and connect it to the bushing 33, and also connect it to the bushing 33. At the same time, by screwing the nut 35 onto the girder male thread 33a, the mounting ring 3 4 toward the bushing 33 to connect the L-shaped terminal 37 to the bushing 33. It has become.

0004

[Problem that the idea aims to solve]

However, the work of screwing the nut 35 onto the bushing 33 described above can be done quickly. In addition, a cable (not shown) is connected to the L-shaped terminal 37. It has quite a bit of weight. Therefore, hold terminal 37 until the work is completed. It takes a lot of physical strength to hold it, and the work of connecting the terminal 37 becomes complicated. Not only is there a problem that the L-shaped terminal 37 is tightened by its head, Therefore, the airtightness between the inner peripheral surface of the opening and the outer end surface of the bushing on the terminal opening side is poor. It wasn't enough.

[0005] The purpose of this invention is to connect terminals extremely easily and reliably without requiring physical effort. An object of the present invention is to provide a connection structure of a terminal to a bushing that allows the connection of a terminal to a bushing.

[0006]

[Means to solve the problem]

The present invention provides a bushing provided on the bottom surface of power distribution equipment, and a bushing for the bushing. The distribution line can be connected in a direction perpendicular to the axis of the bushing when connected. the L-shaped terminal attached to the L-shaped terminal, and the engaging part of the L-shaped terminal upward a protective cover formed with a pressing surface that can be pressed toward the bushing; an open position that allows connection of the L-shaped terminal and a tightening position that prevents the L-shaped terminal from falling off. a mounting member that is rotatable between two positions; A bushing comprising: a tightening member capable of pressing the protective cover upward; The main point is the connection structure of the terminal to the ring.

[0007]

[Effect]

With the mounting member rotated to the open position, hold the L-shaped terminal and connect it to the bushing. Then, when this mounting member is rotated to the tightening position, the mounting member will remain attached even if you remove your hand from the terminal. This prevents the terminal from falling off. Then, use the tightening member to attach the protective cover to the bushing side. When pressed, the pressing surface of the protective cover presses the engaging part of the L-shaped terminal upward, The L-shaped terminal is completely connected to the bushing.

[0008] In this way, when connecting an L-shaped terminal, there is a possibility that the terminal may fall off at the mounting member in the tightened position. Since this is prevented, there is no need to hold the L-shaped terminal until the connection is completed. Also, the edge When the connection of the terminal is completed, the engaging part of the terminal is pressed by the pressing surface of the protective cover. The clamping force of the clamping member is not applied to the terminal itself.

[0009]

【Example】

The following is a concrete example of the connection structure of the terminal to the bushing of the switch. Examples will be described according to FIGS. 1 to 4. As shown in Fig. 2, a switch 1 as a power distribution device is attached to a utility pole 2, and its case is A power supply side bushing 4 and a load side bushing (not shown) are provided on both sides of the thing 3. It is provided. Each bushing 4 is connected to an electric wire (not shown), and is connected to an electric wire (not shown) of the switch 1. The electric circuit is opened and closed according to the opening and closing operation. On the bottom side of casing 3 is connected to a pair of high-voltage cables 6 as power distribution lines, and these high-voltage cables 6 are connected as power distribution lines. The voltage cable 6 is connected to any two phases of the power supply side bushing 4 inside the switch 1. physically connected.

0010 The voltage cable 6 is pulled horizontally from the casing 3 to a position close to the utility pole 2. It is bent at a right angle at that position and is erected downward along utility pole 2. Ru. The lower ends of both high voltage cables 6 are connected to a power supply 7, which is connected to a low It is connected via a pressure cable 8 to a slave station 9 for remote monitoring. Then, run the wire The current is taken out to the power supply 7 side via the high voltage cable 6, and the power supply The voltage is stepped down to a predetermined voltage at step 7 and supplied as operating power to slave station 9 via low voltage cable 8. It is now possible to do so.

[0011] Next, to explain the connection state between the switch 1 and the high voltage cable 6, FIGS. 1, 3, As shown in FIG. 4, a mounting hole 10 is formed on the lower surface of the casing 3. A packing 11 is fitted on the inner periphery of 10. An auxiliary block is inserted into the mounting hole 10 from below. The auxiliary bushing 12 is fitted into the flange 12a of the auxiliary bushing 12. It is in contact with 11. The auxiliary bushing 12 has four holes with a through hole 13a formed in the center. A square mounting plate 13 is fitted from below, and this mounting plate 13 is It is overlapped with the collar portion 12a of the auxiliary bushing 12 via the ring 14. in this state The flange 12a of the auxiliary bushing 12 is a recess 1 formed on the upper surface of the mounting plate 13. 3b.

0012 The four corners of the mounting plate 13 are fixed to the lower surface of the casing 3 with bolts 15. As a result, the flange 12a of the auxiliary bushing 12 is held between the packings 11 and 14. It is fixed to the casing 3 in this state. Although not shown, there is an auxiliary bushing. An electrode is provided at the lower end of the ring 12, and the electrode is connected to the casing 3 via a lead wire 5. and is electrically connected to the power supply side bushing 4.

[0013] A pair of bolts 16 are screwed into both sides of the mounting plate 13. At 6, the base end of a substantially U-shaped mounting bracket 17 as a mounting member is attached to the mounting plate 13. It is rotatably mounted. Below, for convenience of explanation, as shown by the solid line in Figure 1, The position where the fitting 17 hangs downward is the tightening position, and as shown by the imaginary line, The position rotated in that direction is the open position. As shown in FIG. A nut 18 is welded to the lower part, and a mounting bracket 17 is attached to correspond to the nut 18. A through hole 17a is formed in the hole 17a. The nut 18 is tightened from below as a tightening member. The tightening bolt 19 is screwed in, and the tip of the tightening bolt 19 is inserted into the through hole 17a of the mounting bracket 17. A pressure contact piece 20 is fixed to protrude to the opposite side through.

[0014] An L-shaped terminal 21 is connected to the auxiliary bushing 12 from below. The high-voltage cable 6 is connected to 1, which is directly connected to the axis T of the auxiliary bushing 12. They are drawn out horizontally toward the utility pole 2 in the intersecting direction, that is, as described above. L A half-shaped protective cover 22 is placed over the character-shaped terminal 21. At the end, a semicircular fixing fitting 24 is attached with a pair of screws 23 with the terminal 21 held therebetween. Fixed.

[0015] When the mounting bracket 17 is in the tightened position as shown by the solid line in Figures 1 and 3, The pressure contact piece 2 of the mounting bracket 17 is placed in the recess 22a formed in the lower part of the protective cover 22. 0 is in pressure contact and presses the protective cover 22 upward. At this time, the protective cover 2 A gap S is formed between the inner top of the protective cover 2 and the L-shaped terminal 21. 2, a pressing surface 25 formed inside is connected to a flange portion 26 as an engaging portion of the L-shaped terminal 21. The terminal 21 is connected to the auxiliary bushing 12 by pressure contact from below.

[0016] In addition, although the explanation has been made regarding one high-voltage cable 6, the other high-voltage cable 6 have exactly the same configuration. Next, the operation of the terminal connection structure configured as described above will be explained. When connecting the L-shaped terminal 21 to the auxiliary bushing 12 of the switch 1, first, As shown by the imaginary line in FIG. 1, rotate the mounting bracket 17 to the open position, and Loosen the tightening bolt 19 of the mounting bracket 17. Then, it is protected by the L-shaped terminal 21. Attach the cover 22 and fixing bracket 24, hold the terminal 21, and insert the auxiliary bracket from below. Connect to sing 12. Next, as shown in solid lines in FIGS. 1 and 3, the mounting bracket 17 is When the mounting bracket 17 is rotated to the tightening position, the mounting bracket 17 is located below the L-shaped terminal 21, and the This mounting bracket 17 prevents the terminal 21 from falling off even if the hand is removed from the terminal 21. will be stopped.

[0017] Furthermore, when the tightening bolt 19 of the mounting bracket 17 is tightened in this state, the pressure contact piece 20 fits into the recess 22 of the protective cover 22 and presses against it. Therefore, the protective cover 2 The pressing surface 25 of 2 is pressed against the flange 26 of the L-shaped terminal 21 and is pressed against the auxiliary bushing 12. Then, the terminal 21 is completely connected. At this time, the inner top of the protective cover 22 and the L-shape Since a gap S is formed between the shaped terminal 21 and the terminal 21, the tightening bolt is attached to the terminal 21 itself. The tightening force of the bolt 19 is not applied.

[0018] In addition, remove the L-shaped terminal 21 connected in this way from the auxiliary bushing 12. When removing the pressure welding piece from inside the recess 22a of the protective cover 22, loosen the tightening bolt 19. 20 to leave. In this state, if you rotate the mounting bracket 17 to the open position, it will form an L-shape. Terminal 21 can be removed. In this way, the terminal connection structure of this embodiment is rotated to a position close to the auxiliary bushing 12. A movable mounting bracket 17 is provided to connect the L-shaped terminal 21 to the auxiliary bushing 12. In such a case, rotate the mounting bracket 17 to the tightening position to prevent the L-shaped terminal 21 from falling off. Therefore, there is no need to hold the terminal 21 until the connection is completed. Therefore, this L-shape The connection work of the shaped terminals 21 can be easily performed without requiring physical strength.

[0019] Moreover, when the connection of the terminal 21 is completed, the terminal is pressed by the pressing surface 25 of the protective cover 22. Only the flange 26 of the terminal 21 is pressed, and the gap S is formed, so that the terminal 2 1 itself is prevented from being subjected to tightening force. Therefore, a break in the L-shaped terminal 21 It is possible to prevent problems such as the following. Furthermore, since the L-shaped terminal 21 was used to connect the switch 1 and the high voltage cable 6, The high voltage cable 6 can be pulled out horizontally to a position near the utility pole 2, for example. Avoid unnecessary routes like when the high voltage cable 6 is pulled out downward using a normal terminal. There is no need to route the high voltage cable 6 to the utility pole 2 by turning it. Therefore, in the mounted state It also has the advantage of being able to improve the aesthetic appearance.

[0020] Note that this invention is not limited to the above embodiments; for example, in the above embodiments, An end for connecting the high voltage cable 6 to the auxiliary bushing 12 provided in the switch 1 However, we have also developed terminal connection structures for various types of power distribution equipment. It can be made concrete. Further, in the above embodiment, the auxiliary bushing 12 is provided on the completely horizontal lower surface of the switch 1. However, the lower surface may be slightly inclined, and even in that case, the connection of the L-shaped terminal 21 At times, the mounting bracket 17 can prevent the terminal 21 from falling off.

[0021]

[Effect of the idea]

As detailed above, according to the connection structure of the terminal to the bushing load of the present invention, the arm The excellent effect of being able to connect terminals extremely easily without requiring any force. demonstrate.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing when the connection of an L-shaped terminal to a bushing is completed.

FIG. 2 is a front view showing the switch mounted on a column.

FIG. 3 is a side cross-sectional view showing the L-shaped terminal when the connection to the bushing is completed.

FIG. 4 is an exploded perspective view of the auxiliary bushing, the L-shaped terminal, and the auxiliary cover.

FIG. 5 is a sectional view showing a conventional terminal connection structure.

[Explanation of symbols]

1 Switches as power distribution equipment 6 High voltage cables as distribution lines 12 Auxiliary bushing 17 Mounting brackets as mounting members 19 Tightening bolt as a tightening member 21 L-shaped terminal 22 Protective cover 25 Pressure surface 26 Flange as an engaging part T axis

Claims (1)

[Scope of utility model registration request] 1. A bushing (12) provided on the lower surface of a power distribution device (1) can be connected to the bushing (12), and when connected, a power distribution line (6) is connected to the bushing (12).
2) an L-shaped terminal (21) pulled out in a direction perpendicular to the axis (T) of the L-shaped terminal (21);
A protective cover (2) is formed with a pressing surface (25) that can press the engaging portion (26) of the L-shaped terminal (21) upward.
2) between two positions: an open position that allows connection of the L-shaped terminal (21) to a position close to the bushing (12), and a tightened position that prevents the L-shaped terminal (21) from falling off. It is characterized by comprising a rotatable mounting member (17) and a tightening member (19) provided on the mounting member (17) and capable of pressing the protective cover (22) upward. Connection structure of terminal to bushing.