JPH0773721A - Bushing, ceiling installation body, and lighting apparatus - Google Patents

Abstract

PURPOSE:To hold a condition where an installation member is fitted in the stop hole part of an installation hole. CONSTITUTION:A bushing 41 is applied to an installation hole 7 having a large diameter insertion hole part 31, a small diameter stop hole part 32, and a communication part 33 communicating the insertion hole part 31 with the stop hole part 32. The bushing 41 has a fixing part 42 fixed to an edge part of the insertion hole part 31, and stop parts 43 having resilient forward end parts protruded into the communication part 33. A condition where an installation member 21 is fitted in the stop hole part 32 can thus be held by the stop parts 43 of the bushing 41 protruded into the communication part 33.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insertion hole portion and a mounting hole having a locking hole portion communicating with a part of the insertion hole portion through a communication portion and having a narrower hole width than that of the insertion hole portion. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called Dharma hole bushing, a ceiling mount and a lighting fixture using the bushing.

[0002]

2. Description of the Related Art Conventionally, in lighting equipment, there is known a structure in which a fitting hole called a daruma hole is provided in a main body of the lighting equipment, and is attached to a hanging bolt installed on a ceiling surface or the like through the fitting hole. The mounting hole has a circular and large-diameter insertion hole portion, and an elongated hole-shaped and small-diameter locking hole portion is formed to communicate therewith.

Then, at the time of attaching the device, the device body is lifted up, and the nut attached to the lower end of the hanging bolt is inserted through the insertion hole portion to the lower side of the device body, and the instrument body is laterally moved to suspend the locking hole portion. Fit the lower bolt. In this state, since the hole width of the locking hole portion is smaller than that of the nut, even if the pushing up of the instrument body is released, the edge portion of the locking hole portion is placed on the nut and temporarily fixed. In this temporarily fixed state, the nut is tightened to fix the instrument body.

However, for example, in a lighting fixture supported by two suspension bolts, the position of the fixture main body shifts while the nut of one suspension bolt is tightened while the fixture main body is temporarily fixed, The insertion hole may face the nut of the other suspension bolt, and the instrument body may come off from the other suspension bolt.

In order to solve such a problem, for example, Japanese Utility Model Laid-Open No. 1-1444519 or Japanese Utility Model Laid-Open No. 61-1.
As described in Japanese Patent No. 93623, a cut-and-raised piece or a dowel is provided at an edge portion of a communication portion where an insertion hole portion and a locking hole portion communicate with each other, and a hanging bolt is fitted into the locking hole portion. In this state, the nut and the cut-and-raised piece and the dowel engage with each other to prevent the insertion hole portion from coming over the nut.

[0006]

However, in the conventional structure, the cut-and-raised pieces and the dowel prevent the insertion hole portion from coming into contact with the nut. There is a possibility that it may get over the nut, and there is a problem that the temporarily fixed state in which the suspension bolt is fitted in the locking hole cannot be maintained reliably.

The present invention has been made in view of the above points, and a bushing capable of securely holding a mounting member such as a hanging bolt and a locking hole in a fitted state, and a ceiling mounting using the bushing. It is intended to provide a body and a lighting fixture.

[0008]

The invention according to claim 1 is
A bushing for an attachment hole, which has an insertion hole portion and a part of the insertion hole portion that communicates via the communication portion with a locking hole portion having a hole width narrower than the hole width of the insertion hole portion. The fixing portion fixed to the edge portion is provided, and the fixing portion is provided with the elastic locking portion whose tip projects into the communication portion.

According to a second aspect of the present invention, there is provided a mounting hole having an insertion hole portion and a locking hole portion having a narrower width than that of the insertion hole portion which communicates with a part of the insertion hole portion through the communication portion. In the bushing, a fixing portion fixed to an edge portion of the locking hole portion is provided, and the fixing portion is provided with an elastic locking portion having a tip protruding into the communication portion.

According to a third aspect of the present invention, the mounting hole is provided with an insertion hole portion and a part of the insertion hole portion which is communicated with the insertion hole portion through the communication portion and has a locking hole portion having a hole width narrower than a hole width of the insertion hole portion. In the bushing, a fixing portion fixed to an edge portion of the insertion hole portion and the communication hole portion is provided, and an elastic locking portion having a tip protruding into the communication portion is provided to the fixing portion. .

According to a fourth aspect of the present invention, in the structure of the first or second aspect of the invention, the fixing portion is provided with a positioning portion that engages with an edge portion of the communicating portion.

According to a fifth aspect of the present invention, there is provided a mounting hole having an insertion hole portion and a part of the insertion hole portion, which is communicated with the insertion hole portion through the communication portion and has a locking hole portion having a hole width narrower than a hole width of the insertion hole portion. The ceiling mounting body which is provided and which engages a locking hole portion with a mounting member which is inserted through the insertion hole portion and which is locked to a ceiling, wherein the mounting hole has one of the mounting holes. It is equipped with a bushing.

According to a sixth aspect of the present invention, the instrument body has an insertion hole portion and a part of this insertion hole portion which is communicated through the communication portion with a locking hole portion having a hole width narrower than the hole width of the insertion hole portion. In a lighting fixture for mounting a fixture main body by providing a mounting hole and fitting a locking hole portion to a mounting member that is inserted through the insertion hole portion, the mounting hole of the fixture main body is provided in the mounting hole of the fixture main body.
The bushing according to any one of 1 to 3 is attached.

[0014]

According to the first aspect of the invention, the engaging hole portion of the attaching hole provided in the attached body is inserted into the attaching member such as a bolt or a screw, and the engaging hole portion is inserted into the attaching member in this inserted state. When fitting the to-be-attached body by fitting the bushing, by fixing the bushing to the edge of the insertion hole of the mounting hole, the bushing protruding into the communication part between the insertion hole and the locking hole The locking portion holds the state in which the mounting member is fitted in the locking hole. When fitting the locking hole portion to the mounting member, the locking portion is fitted while elastically deforming.

According to a second aspect of the present invention, for example, the locking hole portion of the mounting hole provided in the mounted body is inserted into the mounting member such as a bolt or a screw, and the locking hole portion is inserted into the mounting member in this inserted state. Bushing that protrudes into the communication part between the insertion hole part and the locking hole part by fixing the bushing to the edge part of the locking hole part of the mounting hole when fitting the The locking portion holds the state in which the mounting member is fitted in the locking hole portion. When fitting the locking hole to the mounting member, the locking portion is fitted while elastically deforming.

According to the third aspect of the present invention, the locking hole portion of the mounting hole provided in the mounted body is inserted into the mounting member such as a bolt or a screw, and the locking hole portion is inserted into the mounting member in this inserted state. When fitting the to lock the attached body, by fixing the bushing to the insertion hole of the mounting hole and the edge of the locking hole, the inside of the communication part between the insertion hole and the locking hole The engagement portion of the bushing projecting to the above holds the state in which the attachment member is fitted in the engagement hole portion. When fitting the locking hole portion to the mounting member, the locking portion is fitted while elastically deforming.

According to the invention of claim 4, in addition to the operation of the invention of claim 1 or 2, by fitting the positioning portion of the bushing to the edge portion of the communication portion, the insertion hole portion or the locking portion is engaged. The position of the fixed portion within the hole is determined, and therefore the locking portion is located at the predetermined position of the communication portion.

According to the fifth aspect of the present invention, the locking hole portion of the mounting hole of the ceiling mounting body is inserted through a mounting member such as a bolt or a screw, and the insertion hole portion of the mounting hole and the locking hole portion are communicated with each other. While elastically deforming the engagement part of the bushing protruding into the part,
The locking hole is fitted into the mounting member. Then, the engagement portion of the bushing protruding into the communication portion between the insertion hole portion and the engagement hole portion maintains the state in which the attachment member is fitted in the engagement hole portion, and prevents the ceiling attachment body from coming off the attachment member. To prevent.

According to the sixth aspect of the present invention, for example, the locking hole portion of the mounting hole of the instrument body is inserted through a mounting member such as a bolt or a screw, and the inside of the communication portion between the insertion hole portion of the mounting hole and the locking hole portion. The engaging hole portion is fitted into the mounting member while elastically deforming the engaging portion of the bushing protruding to the side. Then, the engagement portion of the bushing protruding into the communication portion between the insertion hole portion and the engagement hole portion holds the state in which the attachment member is fitted in the engagement hole portion,
Prevent the instrument body from coming off the mounting member.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the first embodiment of the present invention will be described below with reference to FIGS.

FIGS. 4 and 5 show a ceiling-embedded luminaire, in which 1 is a fixture body (ceiling mount).
Is elongated from the top plate part 2, the side plate part 3, and the end plate part 4, and the side plate part 3 and the end plate part 4 are formed with an edge part 5 that is joined to the ceiling surface. A power line insertion hole 6 is formed in the center of the top plate portion 2, and a pair of dull hole-shaped mounting holes 7 are formed near both ends. A terminal block 8 and a lighting device 9 are attached to the inner surface of the top plate portion 2 and a reflector plate 10 is provided.
Is attached. On the inner surface of the end plate portion 4, the reflection plate 10
Lamp sockets 11 are attached to both sides of the lamp socket 11. The straight tube lamp 12 is connected to the lamp socket 11 facing each other.

FIG. 1 shows a hanging bolt 21 as a mounting member for mounting the instrument body 1 on the ceiling surface.
The reference numeral 21 hangs from the ceiling slab in correspondence with the position of each mounting hole 7, and a nut 23 is screwed through a washer 22.

The mounting hole 7 has an insertion hole portion 31 and a locking hole portion 32.
And are formed via the communication portion 33. The insertion hole portion 31 is
It is circular and has a hole diameter that allows the washer 22 and the nut 23 to be inserted in the axial direction. The locking hole portion 32 has a long hole shape and is formed to have a hole width that is slightly larger than the diameter of the suspension bolt 21 that does not allow the washer 22 and the nut 23 to be axially inserted.
The communication portion 33 is formed to have the same width as the locking hole portion 32.

A bushing 41 is attached to the attachment hole 7. The bushing 41 is integrally formed of rubber or resin having elasticity, and has a substantially C-shaped fixing portion 42 fixed to the edge portion of the insertion hole portion 31 by a fixing means such as an adhesive. The fixed portion 42 is provided with a pair of locking portions 43 whose ends project into the communication portion 33 from both sides, and the communication portion 33.
There is formed a pair of positioning portions 44 which are fitted to the edge portions on both sides of and are fixed by fixing means such as adhesion.

The fixing portion 42 has a fitting groove 45 formed on the outer peripheral surface for fitting to the edge portion of the insertion hole 31, and a groove portion 46 formed on the inner peripheral surface. The pair of locking portions 43 are formed in a shape along the arc of the fixed portion 42, and therefore, the tip ends thereof slightly project toward the locking hole portion 32, and the elastic deformation in the direction of the locking hole portion 32 is relatively large. The shape is made to be easy, and elastic deformation in the direction of the insertion hole portion 31 is relatively difficult. Positioning part 44
A fitting groove 47 that fits into the edge of the communication portion 33 is formed.

Next, the operation of this embodiment will be described.

When mounting the instrument main body 1 on the ceiling, first, the instrument main body 1 is lifted, and the washers 22 and the nuts 23 attached to the respective hanging bolts 21 hanging from the ceiling are inserted through the through holes 31 of the respective mounting holes 7. That is, the fixed portion 42 of the bushing 41
Through the lower side of the device body 1.

Subsequently, the instrument body 1 is laterally moved, and the suspension bolt 21 is fitted into the locking hole portion 32. At this time, the pair of locking portions 43 of the bushing 41 come into contact with the suspension bolt 21, but since the locking portions 43 are relatively easily elastically deformed in the direction of the locking hole portion 32, the pair of engaging portions are engaged. The suspension bolt 21 is fitted into the locking hole portion 32 while the stopper portion 43 is elastically deformed. When the suspension bolt 21 is fitted into the locking hole portion 32 and the contact between the pair of locking portions 43 and the suspension bolt 21 is released, the pair of locking portions 43 project into the communicating portion 33 in the original state. Elastic return to.

When the suspension bolt 21 is fitted in the locking hole portion 32, the hole width of the locking hole portion 32 is the washer 22 and the nut.
Since it is smaller than 23, even if the pushing up of the instrument main body 1 is released, the edge portion of the locking hole portion 32 is placed on the washer 22 and the nut 23 and temporarily fixed. In this temporarily fixed state, the nut 23 is tightened to fix the instrument body 1.

After the suspension bolt 21 is fitted into the locking hole portion 32, the tool body 1 is displaced when the nut 23 is tightened, and the insertion hole portion 31 is inserted into the suspension bolt 21. When the pair of locking portions 43 come into contact with the hanging bolts 21 even when the locking portion 43 moves in the direction of fitting into the insertion hole portion 31,
Since it is relatively difficult to elastically deform in the direction of, the movement of the instrument body 1 is restricted, the fitting state between the locking hole portion 32 and the suspension bolt 21 is maintained, and the instrument body 1 is suspended from the suspension bolt 21. Can be prevented from coming off.

Further, since the bushing 41 has the positioning portion 44 formed on the fixing portion 42, the positioning portion 44 is fitted to the edge portion of the communicating portion 33 when the fixing portion 42 is mounted in the insertion hole portion 31. As a result, the position of the fixed portion 42 inside the insertion hole portion 31 is determined, and therefore, the locking portion 43 can be positioned at the predetermined position of the communication portion 33.

Next, FIGS. 6 and 7 show a second embodiment of the present invention. In this embodiment, the engaging hole portion 32 of the mounting hole 7 is formed in a circular shape and the width of the communicating portion 33 is small. Lock hole 32
The bushing 41 is attached to the locking hole portion 32. The bushing 41 includes a fixing portion 42 and a pair of locking portions 43, as in the first embodiment. The pair of engaging portions 43 have their tips slightly projecting toward the engaging hole portion 32, which makes elastic deformation toward the engaging hole portion 32 relatively easy and elastic deformation toward the insertion hole portion 31. Is formed in a shape that makes it relatively difficult.

Also in this second embodiment, after the suspension bolt 21 is fitted into the locking hole portion 32 by the bushing 41, the fitting state of the locking hole portion 32 and the hanging bolt 21 is changed. The same action and effect as in the first embodiment that the device main body 1 is held and can be prevented from coming off from the hanging bolt 21.

It should be noted that as in the second embodiment, the locking hole 32
Also in the bushing 41 to be mounted on, the positioning portion 44 fitted to the edge portion of the communication portion 33 may be formed as in the first embodiment.

Next, FIGS. 8 and 9 show a third embodiment of the present invention. In this embodiment, the fixing portion 42 of the bushing 41 is fixed to the insertion hole portion 31 and the locking hole portion 32, respectively. The parts 42a and 42b are integrally formed. Each fixed part 42a
, 42b around which a fitting groove 45 is formed.

Also in this third embodiment, after the suspension bolt 21 is fitted into the locking hole portion 32 by the bushing 41, the fitting state between the locking hole portion 32 and the hanging bolt 21 is kept. The same action and effect as those of the first and second embodiments, in which the device main body 1 can be held and prevented from coming off from the hanging bolt 21, can be obtained.

When the instrument body 1 has a plurality of attachment holes 7, if the bushing 41 is attached to at least one attachment hole 7, the instrument body 1 is displaced due to the displacement of the instrument body 1.
Can be prevented from coming off the hanging bolt 21.

Further, although the bushing 41 is provided with a pair of locking portions 43 projecting from both sides into the communication portion 33 in the above-mentioned embodiment, one locking portion 43 is provided into the communication portion 33 from one side. It may be configured to project. Furthermore, the bushing 41 is
As shown in the fourth embodiment of FIG. 10, the fitting groove 45 of the fixing portion 42.
The flange portion 51 is formed on one side, and the plurality of claw portions 52 are formed on the other side. When the bushing 41 is attached to the attachment hole 7, the claw portion 52 is formed.
May be inserted from one side of the mounting hole 7 and locked to the other side so as to be mounted on the edge of the mounting hole 7.

The bushing 41 is not limited to being applied to the luminaire main body 1 of the luminaire, but can be applied to an object to be attached having a daruma-hole-shaped attachment hole 7 such as various ceiling attachments.

[0040]

According to the invention of claim 1, by fixing the bushing to the edge portion of the insertion hole portion of the mounting hole, the engagement of the bushing protruding into the communication portion between the insertion hole portion and the locking hole portion. With the stopper, it is possible to reliably hold the state in which the mounting member such as a bolt or a screw is fitted in the locking hole.

According to the second aspect of the present invention, by fixing the bushing to the edge portion of the locking hole portion of the mounting hole, the bushing protruding into the communication portion between the insertion hole portion and the locking hole portion is locked. By the portion, it is possible to reliably hold the state in which the attachment member such as the bolt or the screw is fitted in the locking hole portion.

According to the third aspect of the present invention, the bushing is fixed to the insertion hole portion of the mounting hole and the edge portion of the locking hole portion so that the bushing projects into the communication portion between the insertion hole portion and the locking hole portion. With the engagement portion of the bushing, the state in which the attachment member such as a bolt or a screw is fitted in the engagement hole can be reliably retained.

According to the invention of claim 4, in addition to the effect of the invention of claim 1 or 2, by fitting the positioning portion of the bushing to the edge of the communicating portion, the insertion hole portion or The position of the fixed part in the locking hole is fixed,
Therefore, the locking portion is located at the predetermined position of the communication portion.

According to the invention of claim 5, by fixing the bushing according to any one of claims 1 to 4 to the edge of the mounting hole of the ceiling mount, the insertion hole and the locking hole are provided. The engagement part of the bushing that protrudes into the communication part with the part can securely hold the state where the mounting member such as a bolt or screw is fitted in the locking hole, and prevents the ceiling mounting body from coming off from the mounting member. it can.

According to the invention of claim 6, by fixing the bushing according to any one of claims 1 to 4 to the edge portion of the mounting hole of the instrument body, the insertion hole portion and the locking hole portion are formed. The engagement portion of the bushing protruding into the communication portion with and can securely hold the state in which the attachment member such as a bolt or a screw is fitted in the engagement hole portion, and prevent the instrument body from coming off from the attachment member.

[Brief description of drawings]

FIG. 1 is a perspective view in which a bushing according to a first embodiment of the present invention is mounted.

FIG. 2 is a plan view in which the bushing of the above embodiment is mounted.

FIG. 3 is a perspective view of a bushing according to the above embodiment.

FIG. 4 is a perspective view of the instrument body of the above embodiment.

FIG. 5 is a plan view of the instrument body of the above embodiment.

FIG. 6 is a plan view in which a bushing according to a second embodiment of the present invention is mounted.

FIG. 7 is a perspective view of the bushing of the above embodiment.

FIG. 8 is a plan view showing a bushing according to a third embodiment of the present invention.

FIG. 9 is a perspective view of the bushing of the above embodiment.

FIG. 10 is a perspective view of a bushing showing a fourth embodiment of the present invention.

[Explanation of symbols]

 1 Instrument main body (ceiling mount) 7 Mounting hole 21 Hanging bolt as a mounting member 31 Insertion hole part 32 Locking hole part 33 Communication part 41 Bushing 42 Fixing part 43 Locking part 44 Positioning part

Claims (6)

[Claims] 1. A bushing for a mounting hole, which has an insertion hole portion and a part of the insertion hole portion which is in communication with the insertion hole portion through a communication portion and has a locking hole portion having a hole width narrower than a hole width of the insertion hole portion, A bushing, wherein a fixing portion fixed to an edge portion of the insertion hole portion is provided, and an elastic locking portion having a tip protruding into the communication portion is provided at the fixing portion. 2. A bushing for a mounting hole, which has an insertion hole portion and a part of the insertion hole portion that is in communication with the insertion hole portion through a communication portion and has a locking hole portion having a hole width narrower than a hole width of the insertion hole portion, A bushing characterized in that a fixing portion fixed to an edge portion of the locking hole portion is provided, and the fixing portion is provided with an elastic locking portion having a tip protruding into the communication portion. 3. A bushing for a mounting hole, which has an insertion hole portion and a part of the insertion hole portion that is in communication with the insertion hole portion through a communication portion and has a locking hole portion having a hole width narrower than a hole width of the insertion hole portion, A bushing characterized in that a fixing portion fixed to an edge portion of the insertion hole portion and the communication hole portion is provided, and an elastic locking portion having a tip protruding into the communication portion is provided at the fixing portion. 4. The bushing according to claim 1, wherein the fixing portion is provided with a positioning portion that engages with an edge portion of the communication portion. 5. An insertion hole portion and a mounting hole having a locking hole portion having a hole width narrower than the hole width of the insertion hole portion are provided in the insertion hole portion and a part of the insertion hole portion, and the insertion hole portion is provided. In a ceiling mount body in which a locking hole portion is fitted to a mounting member that inserts into the ceiling and locked to the ceiling, the bushing according to any one of claims 1 to 4 is attached to the mounting hole. Ceiling mount characterized by. 6. An instrument body is provided with an insertion hole portion and a mounting hole having a locking hole portion having a width narrower than a hole width of the insertion hole portion, which is communicated with the insertion hole portion through a communication portion. In a lighting fixture for mounting a fixture main body by fitting a locking hole portion to a mounting member that is inserted through the insertion hole portion, the bushing according to any one of claims 1 to 4 in the mounting hole of the fixture main body. A luminaire characterized by being equipped with.