JPH08200316A - Installation structure for box body - Google Patents

Abstract

PURPOSE: To stably install a box body without increasing the number of part items. CONSTITUTION: A hanging bolt 2 is hung from a ceiling base 40 for hanging a ceiling member 30. A box body 1 has upper and lower insertion pieces 13, 14, each formed with an insertion portion through which the hanging bolt 2 is inserted. Upper and lower nuts 3a, 3b are screwed with the hanging nut 2 for fastening the lower insertion piece 14 vertically and installing the box body 1 to the hanging bolt 2. An extended piece 15 is extended downwardly from a leading end of the lower insertion piece 14. A slit for engaging the lower nut 3b is formed on a substantially center part of the extended piece 15 over the lower insertion piece 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box body for mounting a box body in a double ceiling formed between a ceiling base material and a ceiling material hung on the ceiling base material via suspension bolts. It relates to an attachment structure.

[0002]

2. Description of the Related Art Conventionally, an attachment structure for a box of this type is shown in FIG. This is a suspension bolt C hung from the ceiling base to suspend the ceiling material, and four nuts.
The box E is attached along the up-down direction by screwing D ₁ , D ₂ , D ₃ , and D ₄ . For more details, hanging bolt C
Upper and lower attachment pieces E ₁ and E _{2 that} are bolted to the upper and lower insertion pieces having insertion portions that are inserted into the box body E ₃ are provided above and below the box body E ₃ , respectively, and are screwed to the hanging bolt C. The box E is attached by tightening the upper and lower insertion pieces with the _two nuts D ₁ and D ₂ and the spring washer F inserted so as to contact the lower surface of the lower insertion piece G _2. .

Next, the procedure for attaching the box E will be described. First, the nut D ₁ is screwed to the suspension bolt C, then the upper insertion piece G ₁ is inserted, and the nut D ₂ is screwed to the suspension bolt C and clamped to fix the upper insertion piece G ₁ . To do. Then, the fixed upper insertion piece G ₁ and the upper attachment piece E _{1 of the} box body E are bolted. And hanging bolt
Screw nut D ₃ into place on C, then insert lower insertion piece G ₂ into suspension bolt C, and attach nut D ₄ to suspension bolt C.
The lower insertion piece G ₂ is fixed and the box body E is fixed to the suspension bolt C by screwing it into the upper end of the box and tightening it with the nuts D ₃ and D ₄ via the spring washer F. Finally, the fixed lower insertion piece G ₂ and the lower attachment piece E ₂ of the box body E are bolted, and the box body E is attached to the hanging bolt.

[0004]

In the conventional attachment structure for a box body described above, the lower insertion piece G ₂ is a spring washer.
Since it is fixed by sandwiching it with nuts D ₃ and D ₄ via F and tightening it, even if the nut D ₄ located below the lower insertion piece G ₂ tries to rotate due to vibration or the like, the spring washer F Since the rotation is restricted by being pressed downward by the spring force, the nut D ₄ does not rotate and loosen, and the box E is stably attached.

However, the use of the spring washer F increases the number of parts.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a box attachment structure for stably attaching a box without increasing the number of parts. To do.

[0007]

In order to solve the above-mentioned problems, the first aspect of the present invention is to provide a hanging bolt that hangs from a ceiling base material to suspend a ceiling material, and an insertion portion that is inserted into the hanging bolt. The box body is provided with upper and lower insertion pieces provided above and below the box body, respectively, and the box body is attached to the suspension bolt by being screwed to the hanging bolts so that the lower insertion piece is clamped from both upper and lower directions. Upper and lower nuts, the lower insertion piece has an extending piece extending downward from the tip portion, and the extending piece has a notch portion for engaging the lower nut downward from substantially the center of the tip portion. The insert is cut away.

According to a second aspect of the present invention, in the first aspect, a connecting piece for connecting the upper and lower insertion pieces is provided.

According to a third aspect of the present invention, in the first aspect of the present invention, the lower insertion piece has a configuration in which an extension piece connected to the box body is extended upward.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the cutout portion is cut out wider than the diameter of the hanging bolt, and the insertion portion of the lower insertion piece and The notch is communicated.

[0011]

According to the first aspect of the present invention, the lower nut which is screwed to the suspension bolt and tightens the lower insertion piece from below,
Even if it tries to rotate due to vibration or the like, the rotation is restricted because it engages with the cut portion of the extending piece extended from the lower insertion piece.

According to the second aspect of the present invention, the load of the box body is applied not only to the lower insertion piece which is tightened with the nut and fixed to the suspension bolt, but also to the upper insertion piece which is connected by the connection piece. Like

According to the third aspect of the present invention, since the lower insertion piece has increased rigidity due to the extension piece being extended while being connected to the box body, the mechanical strength against the load of the box body is increased. Will increase.

According to the fourth aspect, the insertion portion is
Since it is communicated with the cutout portion, when inserting the suspension bolt, it is possible to insert the suspension bolt by moving the lower insertion piece from a direction intersecting with the suspension bolt without inserting from the end of the suspension bolt.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. This box attachment structure is composed of a box 1, a suspension bolt 2, and upper and lower nuts 3a and 3b.

The box body 1 includes a bottom plate 11a, side plates 11b, 11c, 11d, 11
It comprises a box body 11 in which e is arranged and a lid 12 which is openably and closably supported by the box body 11, and a device 10 such as a breaker is arranged inside the box body 11. And this box body
Of the 11 side plates, the side plate 11b located above in the attached state.
Is an electric wire insertion part for inserting the electric wire 20 connected to the device 10.
11f is provided. Further, the bottom plate 11a of the box body 11 is provided with upper and lower insertion pieces 13 and 14 having insertion portions 13a and 14a, respectively, which are inserted into the suspension bolt 2 so as to be vertically positioned in an attached state. ing. Specifically, the upper insertion piece 13 is L-shaped, and the insertion portion 13a is formed in a hole shape. The lower insertion piece 14 is formed in a substantially L shape by the one piece 14b and the other piece 14c, and extends downward from the tip of the other piece 14c in parallel with the one piece 14b, that is, in the attached state. 15 have been extended. Then, the extending piece 15 is provided with the other piece 14c of the lower insertion piece 14 from substantially the center of the tip portion.
The notch 15a is cut wider than the diameter of the hanging bolt 2. Then, from this notch 2
The other piece 14c of 14 is notched to approximately the center and an insertion portion 14a is formed. That is, the insertion portion 14a of the lower insertion piece 14 and the cutout portion 15a of the extension piece 15 communicate with each other.

The hanging bolt 2 is hung from the ceiling base material 40 so as to suspend the ceiling material 30 provided with the lighting fixture 30a, and is provided with screw grooves to be screwed into the upper and lower nuts 3a and 3b. There is.

Each of the upper and lower nuts 3a and 3b has a corner portion 3c of a substantially regular hexagonal shape, and a screw groove is formed along the central axis direction.

Next, a procedure for attaching the box body 1 to the suspension bolt 2 will be described. First, the insertion portion 13a of the upper insertion piece 13
The suspension bolt 2 is inserted into the suspension bolt, and then the upper nut 3a is screwed onto the suspension bolt 2 at a predetermined position. And the upper insertion piece
The box 1 is rotated around the insertion portion 13a of 13 as a fulcrum, the suspension bolt 2 is inserted into the insertion portion 14a of the lower insertion piece 14, and then the lower nut 3b is screwed into a predetermined position. Then, finally, the box body 1 is attached to the hanging bolt 2 by screwing the upper nut 3a together with the lower nut 3b from above and below so as to clamp the lower insertion piece 14 therebetween.

At this time, as shown in FIG. 5 or 6, the lower nut 3b screwed to the suspension bolt 2 has a corner 3c extending from the extending piece.
It is located between the notches 15a and engages the notches 15a.

In this embodiment, unlike the conventional example, it is not necessary to use the upper and lower attachment pieces.
It is not necessary to screw a nut for tightening the upper insertion piece 13.

In such a box attachment structure, the lower nut 3b which is screwed to the suspension bolt 2 and tightens the lower insertion piece 14 from below extends from the lower insertion piece 14 even if it is rotated by vibration or the like. Since it engages with the notch 15a of the extended piece 15 provided, rotation is restricted without using a separate part such as a spring washer as in the conventional example, so the number of parts increases. The box body 1 can be stably attached without any trouble.

Further, since the insertion portion 14a communicates with the cutout portion 15a, when the hanging bolt 2 is inserted, the insertion portion 14a does not have to be inserted from the end portion of the hanging bolt 2 from the direction intersecting with the hanging bolt 2. Since it can be inserted by moving the lower insertion piece 14, the work of attaching the box body 1 becomes easier.

Next, the second embodiment of the present invention will be described with reference to FIG.
And it demonstrates below based on FIG. The members having substantially the same functions as those in the first embodiment are designated by the same reference numerals, and only the differences from the first embodiment will be described.

In the first embodiment, the upper and lower insertion pieces 13, 1
4 are separately attached to the bottom plate 11a of the box body 11, whereas in the present embodiment, they are attached to the bottom plate 11a of the box body 11 in an integrated state. ing.
Specifically, the upper and lower insertion pieces 13 and 14 are connected by a connection piece 16 that is continuously provided on the bottom plate of the box body 11. The connecting piece 16 is also an extending piece 17 which is continuously provided on the bottom plate 11a of the box body 11 and extends upward from the lower inserting piece 14. Further, the lower insertion piece 14 is composed of only the other piece 14b.

In addition to the effect of the first embodiment, in the attachment structure of such a box body, the load of the box body 1 is fastened by the upper and lower nuts 3a, 3b and fixed to the hanging bolt 2. Since not only the lower insertion piece 14 but also the upper insertion piece 13 connected by the connection piece 16 is applied, the lower insertion piece 14
The load applied to the lower insertion piece 14 is less likely to bend downward, and the box 1 can be attached more stably.

Further, the lower insertion piece 14 has increased rigidity due to the extension piece 17 connected to the box body 11 being extended upward, so that the mechanical strength against the load of the box body 11 is increased. Therefore, the lower insertion piece 14 is less likely to bend downward, and the box body 11 can be attached more stably.

In each of the first and second embodiments, the insertion portion 14a of the lower insertion piece 14 communicates with the cutout portion 15a of the continuous piece 15, but the suspension bolt 2 is inserted from its end. Part 14
If the workability is not so bad even if it is inserted in a, it may not be connected, and in that case, the degree of freedom in design becomes large.

Further, in the second embodiment, the connecting piece 16 for connecting the upper and lower insertion pieces 13 and 14 is provided, and the lower insertion piece is connected to the bottom plate 11a of the box body 11.
It is also a configuration in which a stretched piece 17 stretched upward from 14 is provided, but when the mechanical strength of the lower insertion piece 14 is sufficiently large, either one of the configurations may be used, in which case the degree of freedom in designing. Grows larger.

[0030]

According to the first aspect of the present invention, the lower nut for screwing the hanging bolt to tighten the lower insertion piece from below is:
Even if you try to rotate due to vibration etc., it will rotate without using a separate part such as a spring washer as in the conventional example because it engages with the notch of the extended piece extended from the lower insertion piece. Is regulated, the box body can be stably attached without increasing the number of parts.

According to a second aspect of the invention, in addition to the effect of the first aspect, the load of the box body is not limited to the lower insertion piece which is tightened with the nut and fixed to the suspension bolt, but also the connection piece. Since it is also applied to the connected upper insertion piece, the load applied to the lower insertion piece is reduced, the lower insertion piece is less likely to bend downward, and the box body can be attached more stably.

According to the third aspect of the present invention, since the lower insertion piece has increased rigidity due to the extension piece connected to the box body extending upward, the mechanical strength against the load of the box body is increased. Since the mechanical strength is increased, the lower insertion piece is less likely to bend downward, and the box body can be attached more stably.

According to the fourth aspect of the present invention, since the insertion portion communicates with the cutout portion, when inserting the suspension bolt, the insertion bolt does not need to be inserted from the end of the suspension bolt, but in a direction intersecting with the suspension bolt. Since it can be inserted by moving the lower insertion piece from above, the work of attaching the box body becomes easier.

[Brief description of drawings]

FIG. 1 is a side view showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing a back surface of the box body attached according to the above.

FIG. 3 is a perspective view showing the inside of the box body attached according to the above.

FIG. 4 is a front view showing a tightened state with the above nut.

FIG. 5 is a plan sectional view showing an engagement state between the nut and the extending piece according to the above.

FIG. 6 is a front view showing the engagement state between the nut and the extending piece according to the above.

FIG. 7 is a side view showing a second embodiment of the present invention.

FIG. 8 is a front view showing a tightened state with the above nut.

FIG. 9 is a side view showing a conventional example.

[Explanation of symbols]

 1 Box body 11 Box body 13 Upper insertion piece 14 Lower insertion piece 15 Extended piece 15a Cutout 16 Connection piece 17 Stretched piece 2 Hanging bolt 3a Upper nut 3b Lower nut 30 Ceiling material 40 Ceiling base material

Claims (4)

[Claims] 1. A box body in which hanging bolts are hung from a ceiling base material to hang a ceiling material, and upper and lower insertion pieces having insertion portions inserted into the hanging bolts are provided above and below the box body, respectively. , And an upper nut and a lower nut for attaching the box body to the hanging bolt by screwing the lower inserting piece in both directions from above and below so as to tighten the lower inserting piece, and the lower inserting piece extends downward from the tip portion. The attachment structure of the box body, wherein the extending piece is extended, and the extending piece has a cutout portion for engaging the lower nut from the substantially center of the tip portion to the lower insertion piece. 2. The attachment structure for a box according to claim 1, further comprising a connecting piece for connecting the upper and lower insertion pieces. 3. The attachment structure for a box body according to claim 1, wherein, in the lower insertion piece, an extension piece continuous with the box body is extended upward. 4. The cutout portion is cut out wider than the diameter of the suspension bolt, and the insertion portion of the lower insertion piece and the cutout portion communicate with each other.
Attachment structure of the box body described.