JPH0747968Y2 - Terminal box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a terminal box used for connecting a lead wire of a three-phase motor and a lead wire on a power feeding side by using a crimp terminal.

[Conventional technology]

Conventionally, in order to electrically connect the lead wire of the electric motor and the lead wire on the power feeding side, crimp terminals are attached to the tip portions of both lead wires, and both crimp terminals are fastened with bolts and nuts. At this time, the bolt was inserted into the through hole of the crimp terminal, and both crimp terminals were pressed by the head of the bolt and the nut so as to be in contact with each other. The both crimp terminals thus connected were insulated by being wrapped with an insulating tape after the bolting was completed.

[Problems to be solved by the device]

However, if both crimp terminals are fastened with bolts and nuts as described above, the worker must carry out the connection work while holding a hand tool such as a screwdriver and a spanner in both hands. Therefore, when connecting two lead wires in the same direction, for example, it becomes difficult to keep the lead wires in a desired direction when bolting. Moreover, if the crimp terminals are insulated with insulating tape,
When three lead wires are provided as in a phase motor, the insulation work is not only troublesome, but also the work time is long.

[Means for Solving the Problems]

The terminal box according to the present invention is integrally molded with an insulating material,
A terminal box main body in which the crimp terminal of the power supply side lead wire and the crimp terminal of the power receiving side lead wire are stacked and bolted together with the lead wires facing in the same direction, and the terminal box body is detachably provided. It consists of an insulating case, and the terminal box body is
A plurality of crimp terminal mounting portions that define adjacent terminals by partitions are arranged side by side, and a nut to which the crimp terminal fastening bolt is screwed is fitted and held in each crimp terminal mounting portion, and the insulating case is The terminal box body is provided with an opening into which the terminal box body is fitted, and the terminal box body is covered from the side opposite to the extending direction of the lead wires.

[Action]

Put the crimp terminal of the power supply side lead wire and the crimp terminal of the power receiving side lead wire on top of each other and place them on the nut of the terminal box body. The terminals are electrically connected. Then, when the insulating case is mounted on the terminal box body, each crimp terminal mounting portion of the terminal box body is surrounded by the insulating material, and the crimp terminals therein are insulated.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to FIGS. 1 (a) to (c) to FIG.

1 (a) to 1 (c) are views showing a terminal box body of a terminal box according to the present invention. FIG. 1 (a) is a plan view, FIG. 1 (b) is a front view, and FIG. It is a side view. Figure 2 is Figure 1 (a).
2 is a sectional view taken along line II-II, FIG. 3 is a sectional view taken along line III-III, and FIGS. 4 (a) to 4 (c) are views showing an insulating case of the terminal box according to the present invention. Is a plan view, (b) is a front view, and (c) is a side view. FIG. 5 is an exploded perspective view of the terminal box according to the present invention. In these figures,
Reference numeral 1 is a terminal box body, and 2 is an insulating case that constitutes the terminal box of the present invention together with the terminal box body 1. The terminal box body 1 is
As shown in FIG. 1 (a), the crimp terminal mounting portions 3 that are open to the upper surface and the front surface of the terminal box body 1 are integrally formed of a synthetic resin having a high insulating property, and are arranged side by side along the width direction. ing. The crimp terminal mounting portion 3 is formed by partially recessing the terminal box body 1 into a substantially U-shape in plan view, and the bottom surface thereof has a U-shaped bent portion (as shown in FIG. 2). The innermost part) is formed higher than the other parts. The depth dimension of the lowest portion of the crimp terminal mounting portion 3 is such that when two lead wires, which will be described later, are placed on the portion in a state of being vertically stacked, both lead wires are connected to the terminal box body 1 Is set so that it does not protrude from the upper surface of the. Also,
The partition wall 3a for partitioning the adjacent crimp terminal mounting portions 3 and the side plates 3b, 3c located outside the crimp terminal mounting portions 3 on both sides have a thickness gradually increasing toward the front side of the terminal box body 1. Has been formed. In other words, the opening width of each crimp terminal mounting portion 3 is gradually narrowed from the U-shaped bent portion toward the front surface side of the terminal box body 1. Further, the side plates 3b, 3c have front end portions projecting forward from the partition wall 3a and projecting portions serving as insulating case fixing locking pieces. Reference numeral 4 denotes a protrusion that is integrally provided on the side plates 3b and 3c and that engages with the insulating case 2. In the present embodiment, the bottom portion of the crimp terminal mounting portion 3 is partially cut out so that the above-mentioned locking piece is easily bent in the width direction of the terminal box body 1. Reference numeral 5 denotes a concave groove, which is formed so as to open on the upper surface of the partition wall 3a and is provided along the front-back direction of the terminal box body 1.

6 is a nut hole into which a nut 7 for fastening two crimp terminals described later is fitted, and the nut hole 6 is
It is provided at the innermost portion formed higher than the other portions of the bottom of each crimp terminal mounting portion 3. In addition, in the portion of the terminal box body 1 where the nut hole 6 is formed,
A through hole is provided to allow the tip of the crimp terminal fastening bolt screwed to the nut 7 to escape.

Similar to the terminal box body 1, the insulating case 2 is integrally molded with a synthetic resin having a high insulating property, and is entirely formed into a bottomed rectangular tube shape as shown in FIGS. 4 (a) to 4 (c). ing. The insulating case 2 is formed with a size such that the terminal box body 1 fits in the opening 2a, and the upper plate 2b facing the upper surface of the terminal box body 1 is provided with the two recessed grooves 5, respectively. Two partition plates 2c, 2c to be inserted are provided so as to project downward. Reference numeral 8 is an engaging hole with which the projection 4 of the terminal box body 1 is engaged, which is opened in the left and right side plates 2d, 2e.

Reference numeral 9 denotes a bracket for fixing the insulating case 2 to an electric motor (not shown) or the like, which is provided on the outer bottom portion of the insulating case 2 having a bottomed rectangular tubular shape. The bracket 9 has a central portion as viewed from above that is thinner than other portions and has a step 9a.
Is provided, and the through hole 10 is provided so as to connect the upper surface and the lower surface of the stepped portion 9a. Reference numeral 11 denotes a ring formed of a conductive material such as metal, and the ring 11 is formed into a cylindrical shape, and both end surfaces are exposed on the upper surface and the lower surface of the stepped portion 9a and are fitted into the through hole 10. There is. 12 is the step
A lateral hole is formed in a frame portion surrounding 9a. The lateral hole 12 is formed so as to penetrate the left and right frame portions in the width direction of the insulating case 2.

13 is a lead wire of the electric motor as a lead wire on the power receiving side, 14 is a lead wire on the power feeding side, and crimp terminals are provided at the tips of these lead wires.
15 and 16 are installed respectively. 17 is the nut 7
A crimping terminal fastening bolt that is screwed to the case, 18 is a case fixing bolt, 19 is an earth wire wired together with the power supply side lead wire 14, and the crimping terminal 20 is also attached to the tip of the earth wire 19.

In the terminal box configured in this way, the motor side lead wire 13
The crimp terminal 15 and the crimp terminal 16 of the power supply side lead wire 14 are connected on the terminal box body 1. That is, first, both crimping terminals 15 and 16 are placed on the crimping terminal mounting portion 3 of the terminal box body 1 in which the nut 7 is preliminarily mounted so as to be vertically stacked. At this time, as shown in FIG. 5, flat plate-shaped contact pieces of both crimp terminals are brought into contact with each other. This way,
When the terminal box body 1 is mounted, the lower power supply side lead wire 14 is positioned at the lowest portion of the crimp terminal mounting portion 3. Next, the crimp terminal fastening bolts 17 are inserted into the holes of both crimp terminals 15 and 16 from above, and the crimp terminal fastening bolts 17 are screwed onto the nut 7. The crimp terminal mounting portion 3 shown in the present embodiment is formed such that the opening width thereof becomes gradually narrower toward the front side of the terminal box body 1.
Since the crimp terminals 15 and 16 can be positioned therein, the crimp terminals are difficult to rotate even if the fastening bolts 17 are strongly tightened. In this way, both crimp terminals 15, 16 are fastened on the terminal box body 1 and electrically connected. After the crimp terminals are mounted in the three crimp terminal mounting portions 3 of the terminal box body 1, the terminal box body 1 is inserted into the opening 2a of the insulating case 2, and the insulating case 2 is attached to the terminal box body 1 Be crowned. In this case, the insulating case 2 is connected to the lead wires 1
It is crowned from the side opposite to the side on which 3 and 14 are extended (the front side of the terminal box body 1), and the partition plate 2c is fitted into the groove 5 of the terminal box body 1 to perform this. Then, the terminal box body 1 is pushed into the insulating case 2 until the projection 4 of the terminal box body 1 engages with the engagement hole 8 of the insulating case 2, and the assembling operation is completed. As described above, when the partition plate 2c of the insulating case 2 is inserted into the concave groove 5 of the terminal box body 1, the crimp terminal mounting portions 3 adjacent to each other can be completely partitioned from each other, and insulation against insulation can be achieved. The reliability can be increased.

The terminal box assembled as described above has an insulating case 2
It is fixed to an electric motor or the like using the bracket 9 of. When fixing, attach the case fixing bolt 18 to the ring 11 of the bracket 9.
And the bolt 18 is screwed onto a terminal seat (not shown) of the electric motor. When the electric motor is grounded, the ground wire 19 which is wired together with the power supply side lead wire 14 is connected to the case fixing bolt 18. At that time, the crimp terminal 20 of the ground wire 19 is laterally inserted into the lateral hole 12 of the bracket 9 to be arranged on the ring 11, and in this state, the case fixing bolt 18 is tightened. By interposing the ring 11 between the grounding crimp terminal 20 and the terminal seat of the electric motor in this way, even if the terminal box body 1 made of a resin material expands and contracts due to a temperature change, poor contact occurs. Disappears. When the ground wire 19 is not used, a band (not shown) or the like is inserted into the lateral hole 12 as shown in FIG. 6, and the insulating case 2 (entire terminal box) is lead using this band. It can also be held on a wire or electric motor. FIG. 6 is a perspective view showing a state in which a band is attached to the resin case of the terminal box according to the present invention, and 21 in the figure shows the band.

That is, the crimping terminal 16 of the power supply side lead wire 14 and the crimping terminal 15 of the electric motor side lead wire 13 are stacked and placed on the nut 7 of the terminal box body 1, and the fastening bolts 17 are attached to both the crimping terminals 15 and 16. The both crimping terminals 15 and 16 are electrically connected by being penetrated and screwed to the nut 7. Then, when the insulating case 2 is mounted on the terminal box body 1, each crimp terminal mounting portion 3 of the terminal box body 1 is surrounded by an insulating material, and the crimp terminals therein are insulated.

Therefore, when the crimp terminals are fastened together to be electrically connected, the terminal box body 1, the lead wire and the like can be held with one hand and the hand tool can be used with the other hand. Moreover, the crimp terminals 15 and 16 can be insulated simply by mounting the insulating case 2 on the terminal box body 1.

In the present embodiment, the example in which the crimp terminal mounting portions 3 are arranged side by side on the terminal box body 1 is shown. However, the present invention is not limited to such a limitation, and the number of the crimp terminal mounting portions 3 may be changed appropriately. can do.

[Effect of device]

As described above, the terminal box according to the present invention is integrally formed of the insulating material, and the crimp terminal of the power supply side lead wire and the crimp terminal of the power receiving side lead wire are stacked with the lead wires facing in the same direction. It consists of a terminal box body that is bolted and an insulating case that is detachably attached to this terminal box body.
In the terminal box body, a plurality of crimp terminal mounting portions that define adjacent terminals by partitions are arranged side by side, and a nut to which the crimp terminal fastening bolt is screwed is fitted and held in each crimp terminal mounting portion. Since the insulating case is provided with an opening into which the terminal box body is fitted and is covered on the terminal box body from the side opposite to the extending direction of the lead wire, the crimp terminal of the power supply side lead wire and the power receiving side The crimp terminals of the side lead wires are overlapped with each other and placed on the nut of the terminal box body, and the bolt is penetrated through the crimp terminals and screwed onto the nuts, whereby the crimp terminals are electrically connected. Then, when the insulating case is mounted on the terminal box body, each crimp terminal mounting portion of the terminal box body is surrounded by the insulating material, and the crimp terminals therein are insulated. Therefore, when the crimp terminals are fastened together for electrical connection, the terminal box body,
You can carry the work by holding the lead wire, etc. with the other hand and hand tools. The insulation work is completed by mounting the insulation case on the terminal box body. Therefore, according to the terminal box of the present invention, the connecting work can be performed accurately and in a short time without shifting the extending direction of the lead wire.

[Brief description of drawings]

1 (a) to 1 (c) are views showing a terminal box body of a terminal box according to the present invention. FIG. 1 (a) is a plan view, FIG. 1 (b) is a front view, and FIG. It is a side view. Figure 2 is Figure 1 (a).
2 is a sectional view taken along line II-II, FIG. 3 is a sectional view taken along line III-III, and FIGS. 4 (a) to 4 (c) are views showing an insulating case of the terminal box according to the present invention. Is a plan view, (b) is a front view, and (c) is a side view. FIG. 5 is an exploded perspective view of a terminal box according to the present invention, and FIG. 6 is a perspective view showing a state in which a band is attached to a resin case of the terminal box according to the present invention. 1 ... Terminal box body, 2 ... Insulation case, 2a ... Opening,
3 ... Crimp terminal mounting part, 7 ... Nut, 13 ... Motor side lead wire, 14 ... Power supply side lead wire, 15,16 ... Crimp terminal, 17 ... Fastening bolt.

Claims (1)

[Scope of utility model registration request] 1. A terminal box body integrally molded of an insulating material, wherein a crimp terminal of a power supply side lead wire and a crimp terminal of a power reception side lead wire are stacked and bolted together with the lead wire facing in the same direction. The terminal box body is provided with an insulating case that is detachably attached to the terminal box body, and the terminal box body has a plurality of crimp terminal mounting portions that are formed by partitioning adjacent terminals. The nut into which the crimp terminal fastening bolt is screwed is fitted and held in the portion, and the insulating case is provided with an opening into which the terminal box body is fitted, and the extension direction of the lead wire in the terminal box body A terminal box characterized by being crowned from the opposite side.