JPH0625694Y2 - Box bolting device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a bolt fixing device for a box such as a distribution board.

[Background technology]

Conventionally, a structure shown in FIG. 13 has been adopted as a structure for fixing a wooden board for mounting a breaker of a distribution board to a box. Reference numeral 50 is a bottom wall of the box, and reference numeral 51 is a wooden board serving as a device mounting plate. A hat-shaped bolt fixing member 52 is fixed to the bottom wall 50 by welding or the like, and a bolt 53 inserted into a hole 52a of the bolt fixing member 52 is fixed by a nut 56 via a spring washer 54 and a washer 55. 53a is a head of the bolt 53. The bolt 53 is inserted into the hole 51a of the wooden board 51, and the wooden board 51 is fixed by the nut 57.

The reason why the bolt 53 is fixed to the bolt fixing fitting 52 with the nut 56 is as follows. That is, when a device such as a breaker is attached to the wooden board 51 or the box is fixed to the wall of the building, the wooden board 51 needs to be removed. At this time, if the bolt 53 is not held in the box, the bolt 53 is This is because there is a risk of accidental loss and loss.

However, with the bolt fixing structure of FIG. 13, the nut 5
6, bolt 53 using spring washer 54 and washer 55
Since it is fixed, there is a problem that assembly is poor.
Further, since the nut 56, the spring washer 54, and the washer 55 are overlapped with each other and the wooden board 51 is arranged thereon, the height of the wooden board 51 from the box bottom wall 50 is increased. Therefore, a large device such as an integrated watt hour meter may not fit in the box.

On the other hand, regarding the structure for fixing the bolts by the conventional technique which is the reference of the present invention, for example, Japanese Utility Model Publication No. 62-104
No. 82. This one has a back space into which the head of the bolt can be fitted, and has a shaft insertion groove that inserts the shaft of the bolt from the center to the upper edge of the front plate. Hook plate (bolt fixing cover) that has a formed pad (bolt fixing metal fitting) and a claw (engaging portion) that can be engaged with the lower edge of this pad and that also has a shaft portion insertion hole through which the shaft portion of the bolt is inserted. Consists of and
The hook of the hook plate is hooked on the lower edge of the front plate of the putt so that the hook plate is rotatably fixed to the putt.

With this, the bolts can be easily fixed, and the height of the device mounting plate by the bolts can be reduced. However, there is a problem in that it is not easy to use because the position where the bolt is fixed is limited to one position.

[Purpose of device]

The object of the present invention is to fix the bolts easily, and to lower the height of the device mounting plate by the bolts. Also, the position for fixing the bolts is not limited to one place, and thus the usability is improved. The purpose of the present invention is to provide a bolt fixing device for a box.

[Disclosure of device]

A bolt fixing device for a box according to claim 1, wherein the bolt fixing device is provided on an inner surface of a bottom wall of the box and has a shaft insertion groove through which a shaft of the bolt is inserted and which holds the head of the bolt, and the bolt fixing device. And a bolt fixing cover provided on the outer surface of the bolt, the bolt fixing cover having a shaft insertion hole for inserting the shaft of the bolt, and having an engaging portion for removably engaging with the bolt fixing bracket. In the fixing device, the bolt fixing metal fitting has a head insertion groove through which the head of the bolt is inserted, and the shaft insertion groove is continuously provided at both ends of the head insertion groove to fix the bolt. Fixing the bolt fixing cover to the bolt fixing metal fitting by engaging the engaging part of the cover with one end of the bolt fixing metal fitting and the head insertion groove side edge, or with the other end of the bolt fixing metal fitting and the head insertion groove side edge. Characterized by It is intended.

According to a second aspect of the present invention, there is provided a box bolt fixing device as set forth in the first aspect, wherein the bolt fixing member has one end and a head insertion groove side edge and the other end and a head insertion groove side edge formed at substantially the same interval. It is characterized by that.

According to the configuration of the present invention, the bolt is fixed to the bolt fixing fitting by the bolt fixing cover that is detachably fixed to the bolt fixing fitting by the engaging portion, so that the bolt can be fixed more easily than the case of fixing the bolt with the nut. . Also, since the bolt fixing cover having the engaging portion is used for fixing without using a nut or a washer, the height overlaid on the bolt fixing metal fitting can be lowered, and the height of the equipment mounting plate from the box bottom wall can be lowered. .
Further, the shaft insertion groove is continuously provided at both ends of the head insertion groove, and the engaging portion of the bolt fixing cover is connected to one end of the bolt fixing metal fitting and the side edge of the head insertion groove, or the other end of the bolt fixing metal fitting and the head. Since the bolt fixing cover is fixed to the bolt fixing metal fitting by engaging with the side edge of the portion insertion groove, the shaft portion of the bolt can be fixed even if it is inserted into any of the shaft portion insertion holes at both ends, thus improving usability.

According to the structure of claim 2, since one end and the head insertion groove side edge and the other end and the head insertion groove side edge of the bolt fixing bracket are formed at substantially the same intervals, the bolts can be attached with the same bolt fixing cover. It can be fixed, and the assemblability of the bolt fixing cover can be improved.

Embodiment An embodiment in which the present invention is applied to a distribution board will be described with reference to FIGS. 1 to 10. In this box bolt fixing device, a bolt fixing metal fitting 2 is fixed to a bottom wall 1a of the box by welding or the like, and a bolt 4 is fixed to the bolt fixing metal fitting 2 by a bolt fixing cover 3.

The whole distribution board will be described with reference to FIGS. As shown in FIG. 8, the door 5 of the box 1 is openably and closably attached by the hinge 6, and the bolt fixing metal fittings 2 are fixed to the four corners of the bottom wall 1a of the box 1. As shown in FIG. 10, a wooden device mounting plate 9 is fixed to the bolts 4 fixed to the bolt fixing fittings 2 with nuts 10. A branch breaker 22, a main breaker, an integrated watt hour meter (not shown), etc. are attached to the device mounting plate 9. Reference numeral 11 is a cover, and 12 is a bus bar connected to the breaker 22.

4 to 6 show the bolt fixing fitting 2 and the bolt fixing cover 3. The bolt fixing member 2 is formed in a hat shape and fixed to the box 1 by the fixing portions 13 of the outward flanges 2a. In the web portion 2b of the bolt fixing member 2, two shaft portion insertion grooves 14 through which the shaft portion 4a of the bolt 4 is inserted are vertically formed. Between the shaft portion insertion grooves 14, the head portion 4b of the bolt 4 is formed.
A head insertion groove 15 having a width that allows the insertion of the head is provided. Also,
The bolt fixing member 2 has one end and the side edge of the head insertion groove 15 and the other end and the side edge of the head insertion groove 15 formed at substantially the same interval.

The bolt fixing cover 3 is to be superposed on the web portion 2b with respect to the shaft portion inserting groove 14 on one side of the bolt fixing metal fitting 2, and has a long hole-like shaft portion inserting hole 16 through which the shaft portion 4a of the bolt 4 is inserted. Have. Suspended pieces 17 are provided on a pair of opposing sides of the bolt fixing cover 3, and a claw-shaped engaging portion 18 is projectingly provided on an inner surface of a lower end of each of the suspended pieces 17. The engaging portion 18 engages with the end edge 21 (FIG. 6) of the web portion 2b of the bolt fixing member 2 and the inner edge 15a of the head insertion groove 15. A releasing piece 19 extends outward from the hanging piece 17, and a releasing tool engagement concave portion 20 for engaging a tool such as a driver with the releasing piece 19 is provided.

The assembling method will be described. As shown in FIG. 7 (A), the head 4b of the bolt 4 is inserted into the head insertion groove 15 of the bolt fixing fitting 2 fixed to the box 1, and the shaft portion 4a is fitted into one shaft insertion groove 14. (Fig. 7 (B)). After that, the bolt fixing cover 3 is put on the bolt fixing metal fitting 2 with the shaft portion 4a of the bolt 4 penetrating, and the pair of engaging portions 18 are engaged with the bolt fixing metal fitting 2. As a result, the bolt 4 is fixed to the bolt fixing fitting 2 as shown in FIGS. 1 and 2. The device mounting plate 9 is fixed to the fixed bolt 4 with a nut 10 as shown in FIG. The bolt insertion hole 23 of the device mounting plate 9 has a spot facing portion 23a.

When removing the bolt 4 from the bolt fixing bracket 2, as shown in FIG. 1, a tool 25 such as a screwdriver is inserted into the releasing tool engaging recess 20 of the bolt fixing cover 3 and the tool 25 is tilted to remove the bolt fixing cover 3. Attach the engaging part 18 to the bolt fixing bracket 2
Remove from As a result, the bolt fixing cover 3 and the bolt 4 can be removed.

In this way, the bolt 4 can be fixed and removed, but since the bolt 4 is fixed to the bolt fixing fitting 2 by the bolt fixing cover 3 which is detachably fixed by the engaging portion 18, the thirteenth
The bolt 4 can be fixed more easily than the case where the bolt 53 is fixed with the nut 56 as in the example of the figure. Moreover, since the bolt fixing cover 3 having the engaging portion 18 is used for fixing without using nuts or washers, the height of the bolt fixing metal fitting 2 can be reduced, and the height of the device mounting plate 9 from the box bottom wall 1a can be reduced. Can be lowered. Therefore, even if a large device is mounted on the device mounting plate 9, it can be housed in the box 1. Further, the shaft insertion groove 14 is continuously provided at both ends of the head insertion groove 15, and the engagement portion 18 of the bolt fixing cover 3 is fixed to one end of the bolt fixing fitting 2 and the side edge of the head insertion groove 15 or the bolt fixing. Since the bolt fixing cover 3 is fixed to the bolt fixing metal fitting 2 by engaging the other end of the metal fitting 2 and the side edge of the head insertion groove 15, the shaft portion 4a of the bolt 4 is inserted into the shaft insertion groove 14 of either end. It can be fixed even if it is done, which improves usability. Further, since one end and the head insertion groove 15 side edge and the other end and the head insertion groove 15 side edge of the bolt fixing bracket 2 are formed at substantially the same intervals, the same bolt fixing cover 3
The bolt 4 can be fixed with the bolt fixing cover 3
Can be assembled more easily.

In the above embodiment, the bolt insertion hole 23 of the device mounting plate 9 is used.
Although the counterbore 23a is provided in the above, the nut 10 may be projected on the front surface of the device mounting plate 9 as shown in FIG. Also,
As shown in FIG. 12, the bolt fixing metal fitting 2 ′ may be a pair of Z-shaped metal fittings 30 arranged to face each other.
In this case, the shaft insertion groove 14 'is formed between the tips of the Z-shaped metal fitting 30.

[Effect of device]

The box bolt fixing device of this invention fixes the bolt to the bolt fixing bracket by the bolt fixing cover that is detachably fixed to the bolt fixing bracket at the engaging portion, so it is easier than fixing the bolt with the nut. Can be fixed. Also,
Since it is fixed with a bolt fixing cover that has an engaging part without using nuts and washers, the height of the bolt fixing metal fitting can be reduced and the height of the equipment mounting plate from the box bottom wall can be reduced. There is. Further, the shaft insertion groove is continuously provided at both ends of the head insertion groove, and the engaging portion of the bolt fixing cover is connected to one end of the bolt fixing metal fitting and the side edge of the head insertion groove, or the other end of the bolt fixing metal fitting and the head. Since the bolt fixing cover is fixed to the bolt fixing metal fitting by engaging with the side edge of the portion insertion groove, the shaft portion of the bolt can be fixed even if it is inserted into any of the shaft portion insertion holes at both ends, thus improving usability.

According to the structure of claim 2, since one end and the head insertion groove side edge and the other end and the head insertion groove side edge of the bolt fixing bracket are formed at substantially the same intervals, the bolts can be attached with the same bolt fixing cover. It can be fixed, and the assemblability of the bolt fixing cover can be improved.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a lateral sectional view thereof, FIG. 3 is a sectional view of the same mounting state of the device mounting plate, and FIG. 4 is an exploded perspective view thereof. 5 is a perspective view of the bolt fixing cover, FIG. 6 is a perspective view of the bolt fixing metal fitting, FIG. 7 is an explanatory view of the assembling process thereof, and FIG. 8 is the bolt fixing device. FIG. 9 is a perspective view of a distribution board, FIG. 9 is a perspective view of the distribution board in a closed state, FIG. 10 is an enlarged cross-sectional view of the distribution board, and FIG. 11 is a cross section of another embodiment of the present invention. FIG. 12 is a perspective view of a bolt fixing metal fitting according to still another embodiment, and FIG. 13 is a sectional view of a conventional example. 1 ... Box, 1a ... Bottom wall, 2 ... Bolt fixing metal fitting, 3 ...
Bolt fixing cover, 4 ... Bolt, 4a ... Shaft part, 4b ... Head part, 9 ... Device mounting plate, 14 ... Shaft part insertion groove, 16 ... Shaft part insertion hole, 18 ... Engagement part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-121168 (JP, A) JP 62-10482 (JP, Y2) JP 58-13039 (JP, Y2)

Claims (2)

[Scope of utility model registration request] 1. A bolt fixing metal fitting, which is provided on an inner surface of a bottom wall of a box and has a shaft inserting groove for inserting a shaft portion of a bolt, and which holds a head portion of the bolt, and is provided so as to overlap with an outer surface of the bolt fixing metal fitting. And a bolt fixing cover having a shaft insertion hole for inserting the shaft of the bolt and having an engaging portion engageably and disengageably engaged with the bolt fixing metal fitting, and a bolt fixing device for a box, The bolt fixing metal fitting has a head insertion groove through which the head portion of the bolt is inserted, and the shaft insertion groove is continuously provided at both ends of the head insertion groove, and the engaging portion of the bolt fixing cover is provided. The box is characterized in that the bolt fixing cover is fixed to the bolt fixing metal fitting by engaging one end of the bolt fixing metal fitting and the head insertion groove side edge, or the other end of the bolt fixing metal fitting and the head insertion groove side edge. Bolt of Fixing device. 2. The utility model registration claim, wherein the bolt fixing member has one end and a head insertion groove side edge and the other end and a head insertion groove side edge formed at substantially the same interval. Box fixing device for a box according to item (1).