JP2866569B2 - Fusible link block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fusible link block for mounting a fuse connected between a battery and an electric device.

[0002]

2. Description of the Related Art FIGS. 6 and 7 show conventional fusible link blocks 1 and 3, respectively. These fusible link blocks 1 and 3 are for connecting a fuse between a battery and an alternator or between a battery and another electric device in an automobile.

A fusible link block 1 shown in FIG.
Indicates those described in Japanese Utility Model Laid-Open No. 62-54465. The fusible link block 1 includes a block body 5 and a bus bar 7 attached to the block body 5. The block main body 5 is formed with a fuse mounting portion 11 to which the fuse 9 is mounted and a terminal fixing portion 13 recessed inward. The terminal fixing portion 13 includes a nut (not shown). Also, the terminal fixing portion 13
The male terminal portion of the fuse 9 mounted on the fuse mounting portion 11 is inserted into it, and is fixed together with the terminal of the terminal portion of the electric wire W by a bolt 15. The terminal fixing portion 13 can be freely opened and closed by a cover 17. The cover 17 is connected to the block body 5 via the hinge 19.
It is integrally molded with. Further, a locking projection 21 protrudes from the side wall of the block body 5, and a locking claw 23 is provided on the free end side of the cover 17. Then, by engaging the locking claws 23 with the locking projections 21, the state where the cover 17 closes the terminal fixing portion 13 is maintained.

[0004] The bus bar 7 has one end protruding from the block body 5 and has a connecting portion 7a connected to the battery post. The other end of the bus bar 7 is disposed on the terminal fixing portion 13 and, as described above,
Is fixed together.

Further, a cover 25 for covering the upper portion of the fuse mounting portion 11 is formed integrally with the fusible link block 1 on the block body 5.

To assemble such a fusible link box 1, the fuse 9 is mounted on the fuse mounting portion 411 with the cover 17 opened, and the male terminal portion is inserted into the terminal fixing portion 13. Next, after inserting the terminal of the wire end into the terminal fixing portion 13, the bolt 15 is inserted therethrough,
The bolt 15 is tightened with a tool such as an impact wrench, and the bus bar 7, the male terminal portion of the fuse 9, and the terminal of the electric wire end are fixed together. After the joint fastening operation is completed, the terminal fixing portion 13 is closed by the cover 17 so that the terminal fixing portion 13 is protected.

The fusible link block 3 shown in FIG.
Indicates those described in Japanese Utility Model Laid-Open No. 63-182048. This fusible link block 3 also has a block body 27 and
The block main body 27 is formed with a bus bar 29 and a fuse mounting portion 31 is formed. The bus bar 29 of the fusible link block 3 has a fixing portion 33 to the battery post at one end, and a terminal fixing portion 3 at the other end.
A crimping portion 37 that is accommodated in the wire 5 and connects the terminal of the electric wire is formed. In this fusible link block 3,
The wire end is crimped and connected to the crimping portion 37 of the bus bar 29, and the terminal of the fuse 39 is connected to the elastic holding portion 4 of the bus bar 29.
1.

The terminal fixing portion 35 can be opened and closed by a cover 43 integrally formed on the block main body 27 via a hinge, similarly to the above-described fusible link block 1, so that the terminal fixing portion 35 is protected. Have been.

[0009] Such a fusible link block 3
In order to assemble, the terminal of the electric wire W is crimped and connected to the crimping portion 37 of the bus bar 29, and then the bus bar 29 is assembled to the block main body 27. Next, the fuse 39 is mounted on the fuse mounting portion 31 and the male terminal portion 39a is fixed to the elastic holding portion 4.
Attach to 1. By closing the terminal fixing portion 35 with the cover 43, the terminal fixing portion 35 is protected.

[0010]

However, in the fusible link box 1 described above, since the cover 17 for closing the terminal fixing portion 13 is formed integrally with the block body 5, the terminal fixing portion 13 is provided with an electric wire terminal. When the terminals are fixed together, a force at the time of bolt tightening is applied to the cover 17 via the hinge. For this reason, the cover 17 may be cracked or broken and damaged. When the cover 17 is cracked or cracked, the cover 17 may fall off the block body 5 and the terminal fixing portion 13 may not be reliably protected.

Further, at the time of the joint fastening operation, the covers 17, 43 which previously close the terminal fixing portions 13, 35 are opened, and after the joint fastening operation, the cover is closed again.
Work is troublesome and workability is poor.

Furthermore, if the covers 17 and 43 are forgotten to be tightened after the co-tightening work is performed, or if the covers 17 and 43 are not completely tightened, it cannot be detected, and there is a problem that the forgotten tightening remains. .

Accordingly, the present invention improves the workability of co-fastening to the terminal fixing portion, and can detect forgetting to tighten the cover of the terminal fixing portion, thereby securely closing the terminal fixing portion with the cover. The purpose is to provide a fusible link block that can be used.

[0014]

SUMMARY OF THE INVENTION In order to achieve the above object, according to the first aspect of the present invention, there is provided a block body having a fuse mounting portion to which a fuse is mounted and a terminal fixing portion, and one end attached to the block body. A bus bar connected to the battery post and having the other end fastened together with the terminal portion of the fuse and the terminal of the wire terminal to the terminal fixing portion; one end of the bus bar rotatably supported by the block body and the battery post; A fusible link block provided with a connecting portion cover that covers a connecting portion with the outer cover that is slidably assembled to the block main body and that can open and close the terminal fixing portion, and the outer cover forms the terminal fixing portion. holding means for holding the outer cover in a position closing, the outer cover, terminal fixing portions
And a temporary locking means for temporarily fixing at an open position .

According to a second aspect of the present invention, there is provided the fuse according to the first aspect.
A jibble link block, wherein the lock arm and the front
Abuts against the lock arm when not engaged with the stopper wall
To prevent the rotation of the connection portion cover,
A detection part that detects the non-closed state of the terminal fixing part by a bar
It is provided on the connection part cover .

[0016]

[0017]

[0018]

According to the first aspect of the present invention, with the terminal fixing portion opened, a fuse is mounted on the fuse mounting portion, and the terminal of the wire terminal is set on the terminal fixing portion. Then, the terminal portion of the fuse, the terminal of the electric wire terminal, and the other end of the bus bar are fixed together by bolts. At this time, a force for tightening the bolt is applied to the block body, but this force is not transmitted to the outer cover. In other words, since the outer cover is slidably mounted on the block body, the force at the time of bolt tightening is not applied to the block body as it is, and the outer cover may be cracked or cracked. There is no. Then, after the joint fastening operation is completed, the outer cover is slid to close the terminal fixing portion, and the outer cover is held by the holding means. From this state, one end of the bus bar is connected to the battery post, and the connection portion cover is rotated to cover the connection between the battery post and one end of the bus bar.
Thereby, the fusible link block can be connected to the battery.

When the terminal portion of the fuse, the terminal of the wire terminal, and the other end of the bus bar are fixed together by bolts, and the outer cover is slid to close the terminal fixing portion, the stopper wall and the lock arm are closed. Is engaged, the outer cover is held at the position where the terminal fixing portion is closed. Further, the outer cover is temporarily fixed in advance at a position where the terminal fixing portion is opened by the temporary locking means, and after the joint fastening operation is completed, the outer cover is slid to the closed position and held by the holding means. Thereby, the terminal fixing portion can be easily closed by the outer cover.

According to the second aspect of the present invention, after the terminal portion of the fuse, the terminal of the wire terminal, and the other end of the bus bar are fixed together by bolts, the outer cover is slid to close the terminal fixing portion. Then, the stopper wall engages with the lock arm, and the outer cover is held at the closed position where the terminal fixing portion is closed. Then, after connecting one end of the bus bar to the battery post, the connection portion cover is rotated to cover a connection portion between the battery post and one end of the bus bar. At this time, if the stopper wall is not engaged with the lock arm, that is, if the terminal fixing portion is not closed by the outer cover, or if the lock arm is not completely closed, or if the engagement between the lock arm and the stopper wall is not complete, Then, the detection portion abuts on the lock arm, and the rotation of the connection portion cover is prevented. This makes it possible to detect that the terminal fixing portion is not securely closed by the outer cover.

[0021]

[0022]

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a fusible link block according to the present invention will be described below with reference to the drawings. FIG.
FIG. 2 is an exploded perspective view of a part of the fusible link block 45, and FIG.

As shown in FIGS. 1 and 2, the fusible link block 45 of the present embodiment has a block body 47.
, A bus bar 49 and a connection portion cover 51. Furthermore, the fusible link block 4 of the present embodiment
In 5, an outer cover 55 that can open and close the terminal fixing portion 53 of the block main body 47 is slidably provided on the block main body 47.

The block main body 47 is formed with terminal fixing portions 53, 53 (only one terminal fixing portion is shown in FIGS. 1 and 2) on both sides facing each other in a box shape. A flexible lock arm 57 is formed on one of the side walls 47a and 47b orthogonal to
A locking projection 59 (see FIG. 3A) protrudes. A nut 63 having a rectangular detent portion is press-fitted into the terminal fixing portion 53 at the bottom of a concave portion 61 depressed inward from the outer periphery. The lock arm 57 protrudes upward from the side wall 47a, and a locking projection 57a protrudes from an end thereof.
The tip 57b extends further upward. The lock arm 57 constitutes a holding means 70 with a stopper wall 69a described later formed on the outer cover 55.

The outer cover 55 has a rectangular cylindrical shape, and guide portions 67a and 67b are formed by projecting the middle portion of the opposing side walls 65a and 65b outward, and one of the guide portions 67a and 67b has one opening side. The edge portion (upper side in FIG. 2) protrudes inward, and the stopper wall 6
9a and 69b (see FIG. 3A) are formed respectively. The lock arm 57 of the block main body 47 is inserted into one of the guide portions 67a, and the locking projection 59 is inserted into the other guide portion 67b.

When the outer cover 55 opens the terminal fixing portion 53 of the block main body 47, the stopper wall 69b abuts on the locking projection 59 to prevent the outer cover 55 from coming off from the block main body 47, and the outer cover 55 is blocked. Temporarily locked to the main body 47. When the locking projection 57a of the lock arm 57 engages with the stopper wall 69a as shown in FIG. 3C, the closed state of the terminal fixing portion 53 of the block body 47 is maintained.

A fuse mounting opening 73 is formed in the upper part of the block body 47, and a fuse 75 is mounted in the fuse mounting opening 73. The fuse mounting opening 73 communicates with the terminal fixing portion 53, and the male terminal portion 77 of the mounted fuse 75 is inserted into the terminal fixing portion 53. Fuse mounting opening 73
On one side, a support portion 79 for rotatably supporting the connection portion cover 51 is formed, and on the other side, a bus bar support portion 81 protruding from the opening edge is formed. On both sides of the bus bar support portion 81, locking claws (not shown) for locking the bus bar 49 are formed.

The bus bar 49 is formed by bending a plate material into an L-shape, and has a terminal portion 83 disposed on the terminal fixing portion 53 on one side and a battery terminal 85 on the other side.
Is formed. These terminal portions 83
Further, through holes 83a and 87a are formed in the connection portion 87, respectively. The battery terminal 85 connected to the connection portion 87 has a post support portion 91 to which the battery post 89 is inserted and electrically connected, and a bolt 9.
3 comprises a connecting portion 95 integrally assembled. The battery terminal 85 is connected to the bus bar 49 by inserting the bolt 93 into the through hole of the bus bar 49 and tightening the nut 97. The post support portion 91, the connection portion 95, and the post support portion 91 of the battery terminal 85 are covered by the connection portion cover 51 rotatably supported by the support portion 79.

The connection portion cover 51 has a support shaft 101 rotatably fitted to the support portion 79 at one end, and a post cover portion 103 covering the battery post 89 at the other end. The support shaft 101 and the post cover 10
A mounting opening cover portion 105 for closing the fuse mounting opening 73 is integrally formed between the mounting opening 3 and the mounting opening 3. Further, a detection portion 107 is provided on one side wall in the width direction of the connection portion cover 51.
Is provided.

As shown in FIG. 3C, the detecting portion 107 is provided between the lock arm 57 and the side wall of the connecting portion cover 51.
Is formed by a wall portion 111 forming an insertion space 109 into which the distal end portion 57b is inserted. In the state where the lock arm 57 is not engaged with the stopper 69a of the outer cover 55, that is, when the terminal fixing portion 53 is not closed by the outer cover 55, the detecting portion 107, as shown in FIG. When the connection portion cover 51 is rotated to close, the lower end of the detection portion 107 cannot be closed by contact with the distal end portion 57a of the lock arm 57. Further, the outer cover 55 and the stopper wall 69a are in a half-engaged state, that is,
Even when the lock arm 57 is pressed against the side wall of the block body 47, the lower end of the connection portion cover 51 contacts the distal end of the lock arm 57, as shown in FIG. We touch and cannot be closed. Accordingly, when the connection portion cover 51 cannot be rotated to close the connection portion with the battery post 89, the terminal fixing portion 53 is closed by the non-engagement state of the stopper portion 69a and the lock arm 57, that is, the outer cover 55. It is detected that the lock arm 57 has not been closed and that the lock arm 57 and the stopper wall 69a are in a semi-engaged state.

Next, a procedure for connecting the terminal of the electric wire terminal to the fusible link block 45 will be described.

First, with the outer cover 55 moved downward to open the terminal fixing portion 53, a fuse 75 is mounted in the fuse mounting opening 73, and the terminal 115 is attached to the terminal fixing portion 53 from below the outer cover 55. insert. Then, the terminal portion 83 of the bus bar 49 is
Then, the male terminal 77 of the fuse 75 and the terminal 115 are fastened and fixed together. Next, the outer cover 55 is slid upward. When the outer cover 55 is slid upward, the stopper wall 69a presses the lock arm 57 against the side surface of the block body 47 to bend. When the outer cover 55 is further slid upward, the stopper wall 69a rides over the locking protrusion 57a, and the locking protrusion 57a and the stopper wall 69a engage. Thus, the outer cover 55 is held at the closed position where the terminal fixing portion 53 is closed.

Then, the post supporting portion 91 is connected to the battery 1.
After fixing to the battery post 89 of the thirteenth, the connection part cover 51 is rotated to cover the fuse 75 and the post support part 91 mounted in the fuse mounting opening 73. At this time, the distal end portion 57b of the lock arm 57 is inserted into the insertion space 109 of the detection unit 107, as shown in FIG. As a result, the fusible link block 45 is attached to the battery post 89.

In this case, when the terminal fixing portion 53 is not closed by the outer cover 55 and is forgotten to be closed, the distal end portion 57b of the lock arm 57 is attached to the outer lower end portion of the wall portion 111 as shown in FIG. Connection part cover 5 for contact
Even if it is rotated, the connection portion with the battery post 89 cannot be completely covered. This makes it possible to detect that the outer cover 55 has been forgotten to be closed.

The stopper wall 6 of the outer cover 55
When the lock projection 57a of the lock arm 57 is half-engaged with the lock projection 57a, the lock arm 57 is excessively bent as shown in FIG. When the connecting portion cover 51 is rotated, the battery post 8 is in contact with the distal end portion 57b of the lock arm 57.
9 cannot be completely covered. This makes it possible to detect the half-fit state of the outer cover 55.

Therefore, forgetting to close the outer cover 55 or a half-engaged state can be reliably detected, and the terminal fixing portion 53 can be reliably closed.

According to the present embodiment, the terminal cover 53 is closed and the outer cover 55 for protection is closed.
Slidably attached to the outer cover 55, the force applied to the block body during
And the outer cover 55 is not cracked or cracked.

If the outer cover 55 is temporarily locked to the block main body, the terminal fixing portion 53 is closed with the outer cover only by sliding the outer cover after the fastening operation is completed. As a result, the work is not troublesome and the workability is improved.

Further, since the detection section 107 can reliably detect whether the outer cover 55 has forgotten to close the terminal fixing section 53 or a semi-engaged state, the terminal fixing section 53 can be securely closed with the outer cover 55. , Can be protected.

In the above embodiment, the outer cover 5
The holding means for holding the terminal 5 at the closed position of the terminal fixing part 53 is constituted by the stopper wall 69a and the lock arm 57, but may have another structure.

[0042]

As described above, according to the first aspect of the present invention, the outer cover for closing and protecting the terminal fixing portion is slidably assembled to the block main body, so that the outer cover is attached to the block main body at the time of joint fastening work. The applied force does not apply to the outer cover, and cracks and
No cracks or the like occur. Therefore, the terminal fixing portion can be securely closed and protected by the outer cover. Further, since the outer cover can be closed simply by sliding the outer cover after the joint fastening operation is completed, workability is improved. In addition, when the outer cover is slid to close the terminal fixing portion after the joint tightening operation is completed, the stopper wall and the lock arm are engaged with each other, so that the mounting workability is improved and the terminal fixing portion is securely fixed with the outer cover. Can be closed and protected. Furthermore, if the outer cover is temporarily locked in the position where the terminal fixing part is opened in advance by the temporary locking means, the terminal fixing part can be easily closed just by sliding the outer cover after the joint tightening work is completed. And workability is improved.

According to the second aspect of the present invention, when the connecting portion cover is rotated to close the connecting portion between the battery post and the bus bar, if the stopper wall and the lock arm are disengaged, Since the rotation of the connection portion cover is prevented by the detection portion abutting on the lock arm, it is possible to detect that the outer cover does not close the terminal fixing portion. Therefore,
It is possible to reliably prevent forgetting to close the terminal fixing part,
The terminal fixing portion can be securely closed and protected.

[0044]

[0045]

[Brief description of the drawings]

FIG. 1 is a perspective view showing a fusible link block according to the present invention.

FIG. 2 is an exploded perspective view showing a fusible link block according to the present invention.

FIG. 3 shows a block body and an outer cover,
(A) is a cross-sectional view showing a state before the outer cover is assembled to the block main body, (b) is a cross-sectional view showing a state where the block main body and the outer cover are assembled, and (c) is an enlarged view of a portion C in (b). FIG.

FIG. 4 is a sectional view showing a relationship between a lock arm and a connection portion cover when the outer cover is forgotten to be closed.

FIG. 5 is a sectional view showing a state in which the outer cover is half-fitted to the block main body.

FIG. 6 is a perspective view showing a conventional fusible link block.

FIG. 7 is a perspective view showing another conventional fusible link block.

[Explanation of symbols]

 45 fusible link 47 block body 49 bus bar 51 connecting part cover 53 terminal fixing part 55 outer cover 57 lock arm 57a locking convex part 57b tip part 69a stopper wall 89 battery post 107 detecting part

Claims (2)

(57) [Claims] 1. A block main body having a fuse mounting part to which a fuse is mounted and a terminal fixing part, and one end connected to a battery post and assembled at the block main body, and the other end of the fuse fixing part is connected to the terminal fixing part. A fusible link block comprising: a bus bar fixed together with a terminal and a terminal of an electric wire terminal; and a connecting portion cover rotatably supported by the block body and covering a connecting portion between one end of the bus bar and a battery post. An outer cover slidably assembled to the block body and capable of opening and closing the terminal fixing portion, holding means for holding the outer cover at a position where the outer cover closes the terminal fixing portion, and the outer cover , Open the terminal fixing part
A fusible link block having temporary locking means for temporarily fixing at a released position . 2. A fusible link block according to claim 1.
A lock between the lock arm and the stopper wall.
When disengaged, it comes into contact with the lock arm and
The rotation of the bar is prevented, and the terminal is secured by the outer cover.
The detecting section for detecting the non-closed state of the fixed section is connected to the connecting section cover.
A fusible link block, characterized in that it is provided in