JP3056129B2 - Lighting fixture mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting base fixed to a mounting surface, wherein a cylindrical base of a cover body provided with a mounting portion for a lighting fixture is relatively rotatable around its cylindrical axis. In addition, the outer base is detachably fitted in the axial direction of the cylindrical shaft, and the outer base is engaged with the opposing surfaces of the mounting base and the cylindrical base of the cover body in accordance with the relative rotation operation from the detachable outer fitting operation position. The present invention relates to a lighting fixture mounting device in which a plurality of engaging pieces and engaging grooves are formed.

[0002]

2. Description of the Related Art Conventionally, as a lighting device mounting apparatus of this kind, a plurality of locking pieces are formed on a cylindrical base of the cover body, and each of the locking pieces is engaged with the mounting base material. When a plurality of locking grooves are formed, and each of the locking pieces is engaged with the corresponding engagement groove along with the relative rotation operation of the cover body from the outer fitting operation position, the lower surface of each of the locking pieces becomes The cover body is suspended and held by the mounting base material in a state of being in contact with the lower inner surface of the pair of upper and lower inner surfaces facing each other in the cylinder axis direction in each locking groove. The distance between the inner surfaces of each of the locking grooves is set to be larger than the thickness of the locking piece. When the stop piece moves to the maximum locking operation position in the lock groove, it engages with the concave portion formed in this lock piece, and A block-shaped stopper member for preventing the return rotation of the cover body to the outer fitting operation position to prevent engagement is mounted in a state in which it can be retracted to the disengagement position against the elastic restoring force of the leaf spring. (For example, 5
9-1370).

[0003]

However, in the conventional lighting fixture mounting apparatus, the gap between the inner surface of each of the locking grooves and the locking piece in the direction of the axis of the cylinder axis appears. Due to the presence, each locking piece can be smoothly engaged with the locking groove. On the other hand, when an external force acts on the cover body, the cover body moves in the direction of the cylinder axis within the range of the gap with respect to the mounting base material. Easy to rattle. Therefore, in order to suppress rattling due to the gap, the thickness of each of the locking pieces is formed to be substantially the same as the facing distance between both facing surfaces in the locking groove,
It is conceivable that both side surfaces in the cylinder axis direction of each locking piece are configured to be in sliding contact with each of both inner side surfaces in the locking groove.
In this case, with the relative rotation operation of the cover body from the outer fitting operation position, the peripheral edges on the engagement start end side of each locking piece and the locking groove are easily caught, so that the cover body with respect to the mounting base material is Easy installation work. In addition, even if each locking piece is engaged in the locking groove, the movement resistance until the locking piece moves to the maximum locking operation position in the locking groove increases, so that the cover body There is a problem that a large operation force is required for the relative rotation operation.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and a main problem thereof is to suppress the backlash of the cover body with respect to the mounting substrate in the axial direction of the cylinder, while at the same time suppressing the mounting substrate. It is an object of the present invention to provide a lighting fixture mounting device capable of quickly and easily performing a mounting operation of a cover body with a small rotating operation force.

[0005]

According to a first aspect of the present invention, there is provided a lighting apparatus mounting apparatus for mounting a lighting device on a mounting base fixed to a mounting surface. The cylindrical base of the cover body provided with, while being rotatable relative to the circumference of the cylindrical axis thereof, and detachably fitted in the direction of the cylindrical axis, the mounting base and the cylindrical base of the cover body. A plurality of locking pieces and locking grooves that engage with each other in accordance with relative rotation operation from a detachable external fitting operation position on opposite surfaces of the lighting device, The present invention is characterized in that each of the locking pieces is configured to be inclined so as to come into contact with both opposing locking surfaces in the locking groove with a relative rotation operation from the external fitting operation position. According to the above-mentioned characteristic configuration, while each of the locking pieces is configured to have a thickness smaller than a facing distance between the two opposite locking surfaces in the locking groove, each of the locking pieces is formed by the locking groove. Since the cover is configured to be inclined so as to contact both opposing locking surfaces, the leading end of the locking piece moves into the locking groove from the leading end of the locking piece with the relative rotation operation of the cover body from the external fitting operation position. Can be smoothly engaged with the locking piece, and the locking piece contacts both opposing locking surfaces in the locking groove until the trailing end of the locking piece moves into the locking groove. Therefore, it is possible to reduce the movement resistance until the entire locking piece slides into the locking groove. Further, in a state in which each of the locking pieces has moved to the maximum locking operation position in the locking groove, the locking pieces contact both opposing locking surfaces in the locking groove. Of the cover body in the direction of the cylinder axis can be suppressed. Therefore, it is possible to quickly and easily mount the cover on the mounting base with a small rotating operation force while suppressing the play of the cover on the mounting base in the cylinder axis direction. In addition, the sliding resistance of the locking pieces increases when the locking pieces are in contact with the two opposing locking surfaces in the locking groove. Inadvertent return rotation of the cover body to the external fitting operation position can be suppressed.

[0006] The characteristic configuration of the lighting fixture mounting device according to the second aspect of the present invention is such that each of the locking pieces comes into contact with both opposing locking surfaces in the locking groove in an elastic pressure contact state. The point is that it is configured. According to the above characteristic configuration, the sliding resistance of the locking pieces in a state where each of the locking pieces is in contact with the two opposite locking surfaces in the locking groove can be further increased. The return rotation preventing force to the outer fitting operation position can be increased.

According to a third aspect of the present invention, there is provided a lighting device mounting apparatus according to the first aspect of the present invention, wherein each of the locking pieces located at a detachable external fitting operation position on the mounting base has a maximum locking operation in a locking groove. When it moves to the position, the free end side engages with a receiving portion formed on the inner surface of the cover body, and a leaf spring made of a leaf spring for restricting the return rotation of the cover body to the external fitting operation position with respect to the mounting base material. The point is that the stopper member is attached in a state where it can be elastically deformed up to the disengagement position. In the above-described characteristic configuration, a part of the return rotational force of the cover body toward the external fitting operation position due to an external force such as vibration is applied to the locking piece in contact with the two opposite locking surfaces in the locking groove. With the simple stopper structure of engaging the free end side of the stopper member made of the leaf spring with the receiving portion, careless preparation of the cover body caused by external force such as vibration can be achieved. The return rotation to the proper external fitting operation position can be restricted. Therefore, as compared with the case where the stopper structure is composed of a block-shaped stopper member and a leaf spring that biases the stopper member as in the above-described conventional lighting fixture mounting device, the components of the stopper structure are different. The number of stoppers can be reduced and the stopper structure can be simplified, and the stopper structure can be advantageously manufactured in terms of cost.

According to a fourth aspect of the present invention, there is provided a lighting device mounting apparatus according to the first aspect, wherein an operation hole for operating the stopper member from the outside to the disengagement position is formed in the cover body. is there. In the above-described feature configuration, since the release operation jig such as a screwdriver can be inserted into the cover body from the outside through the operation hole and the stopper member can be operated to the engagement release position, the stopper member is externally operated to the engagement release position. It is not necessary to provide an operating member for protruding outside the cover body or the mounting base material, and it is possible to improve the appearance design of the cover body and the mounting base material, and to erroneously cause another object to the operating member. The inconvenience that the stopper member is operated to the disengagement position due to the contact does not occur.

According to a fifth aspect of the present invention, there is provided a lighting device mounting apparatus according to the first aspect of the present invention, wherein the cover member at the maximum locking operation position with respect to the mounting base is fixed to the outer fitting operation position side at the stopper member. The point is that a cam surface for elastically deforming the stopper member to the disengaged position when rotated by the above operating force is formed. In the above feature configuration, when the cover body is removed from the mounting base material, the cover body is in the maximum locking operation position with respect to the mounting base material without operating the stopper member to the disengagement position. The stopper member can be elastically deformed to the disengagement position only by rotating the stopper member toward the outer fitting operation position side with a certain or more operating force. Therefore, the work of removing the cover from the mounting base can be performed quickly and easily.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 11 show a first embodiment of a mounting device for a spotlight L, which is an example of a lighting fixture, and a mounting base material fixed by screws to a ceiling surface 1 as a mounting surface. 2, a mounting part 3 for the spotlight L
The cylindrical base 4A of the cover body 4 provided with
It is rotatable around the outer periphery and is detachably attached in the direction of the cylinder axis Y. The detachable outer surface is provided on the opposing surfaces of the mounting base 2 and the cylindrical base 4A of the cover body 4. A plurality of (three in the first embodiment) engaging with each other with a relative rotation operation from a fitting operation position (a position shown in FIG. 6) to a later-described maximum locking operation position (a position shown in FIG. 7). Locking piece 5
And the engaging groove 6 and the cylindrical base 4A of the cover body 4 are relatively slidably contacted and rotated along with the relative rotation of the cylindrical base 4A. A plurality (three in the first embodiment) of guide pieces 7 to be regulated and guided surfaces 8
Is formed.

As shown in FIGS. 1 to 3, the mounting base 2 is made of sheet metal, and a locking piece 5 and a guide piece 7 are integrally formed on the mounting base 2, and the cover The body 4 is composed of a cylindrical base 4A and a cylindrical cover 4B provided with a mounting portion 3 for the spotlight L. The cylindrical base 4A and the cylindrical cover 4B are integrally formed by aluminum die casting. And the cylindrical base 4A
The locking groove 6 and the guided surface 8 are integrally formed.

More specifically, as shown in FIGS. 1 and 2, a plurality of places (three places in the first embodiment) in the circumferential direction of the mounting base material 2 have the same length along the circumferential direction. 1
The tongue pieces 9 are formed at equal intervals, and each of the first tongue pieces 9 is oriented in the direction opposite to the ceiling surface 1 so that their tips protrude outward. Almost section L
, And each of the first tongue pieces 9 is formed with the tip portion of the first tongue piece 9 to form the locking piece 5.
A second tongue piece 10 having a different length along the peripheral direction is formed between each adjacent one of the first tongue pieces 9 of the mounting base 2, and a tip of each of the second tongue pieces 10 is formed. The ceiling part 1
The guide piece 7 is formed by bending about 90 degrees in the direction opposite to the side, and having this tip end.

As shown in FIGS. 1 and 3, the inner peripheral surface 4a of the cylindrical base 4A of the cover body 4 has a plurality of portions (in the first direction) deviated toward the opening end in the circumferential direction. In the embodiment, three points) have the same length along the peripheral direction,
Further, a third tongue piece 11 slightly longer than the length along the peripheral direction of the first tongue piece 9 is formed so as to protrude toward the cylinder axis Y at equal intervals, as shown in FIGS. As shown in FIG. 9, of the inner peripheral surface 4a of the tubular base 4A and the inner surface 4b of the tubular gabber portion 4B of the cover body 4, a circle continuous in a state orthogonal to the inner peripheral surface 4a of the tubular base 4A. Annular inner surface portion 4c
The locking groove 6 is formed by a plurality of (three in the first embodiment) recesses surrounded by the inner surface 11a of each of the third tongue pieces 11 opposed to the inner surface portion 4c.
The guided surface 8 is formed on the inner peripheral surface 4a of the cylindrical base 4A.
It consists of.

As shown in FIGS. 8 and 9, each of the locking pieces 5 at the outer fitting operation position has their engagement start end side in contact with the inner surface portion 4c of the cylindrical gabber portion 4B. so,
The cover body 4 is rotated relative to the mounting base 2 in the clockwise direction toward the ceiling surface 1 so that the locking pieces 5 are locked.
The third tongue piece 1 whose rear end side of the engagement piece 5 is opposed to the inner surface portion 4c in the direction of the cylinder axis Y when it is engaged inside.
1 is configured to be inclined so as to contact the inner surface 11a. In other words, the opposing locking surfaces 12 in the locking groove 6 are constituted by the inner surface 11a and the inner surface portion 4c.
The two locking surfaces 12 are substantially parallel to each other, and each of the locking pieces 5 is provided with a pair of opposite locking surfaces in the locking groove 6 in accordance with the relative rotation operation from the external fitting operation position. 12, the rear end portion of the locking piece 5 is positioned closer to the ceiling surface 1 toward the rear end side, and is configured to intersect with both locking surfaces 12 at an angle of about 3 degrees. is there.

As shown in FIG. 8, the maximum width W1 between the engagement start end and the engagement rear end of each locking piece 5 along the cylinder axis Y is relative to the relative width in the locking groove 6. It is configured to have the same size as the opposing interval W2 between the opposing locking surfaces 12. In addition, when the locking pieces 5 are engaged in the respective locking grooves 6, the upper surface of the locking pieces 5 and the locking surface 12 (the inner surface 1 of the third tongue piece 11) opposed thereto.
1a), and between the lower surface of the locking piece 5 and the locking surface 12 (the inner surface portion 4c of the tubular gabber portion 4B) facing the locking piece 5, the locking piece 5 is substantially interposed therebetween. Since a symmetrical wedge-shaped space is formed, due to the dimensional tolerance of the opposing interval W2 between the locking surfaces 12 and the dimensional tolerance of the maximum width W1 of the locking piece 5, the space is larger than the opposing interval W2 between the locking surfaces 12. Even if the maximum width W1 of the locking piece 5 is slightly large, the presence of the wedge-shaped space formed between the both locking surfaces 12 and the locking piece 5 causes
Since the locking piece 5 is torsionally deformed and engages with the locking groove 6, the locking groove 6 and the locking piece 5 can be manufactured roughly.

As shown in FIGS. 10 and 11, each of the locking pieces 5 at the outer fitting operation position is formed on the mounting base 2 by rotating the cylindrical base 4A of the cover body 4. 6, when the free end side is in contact with the side surface of the projecting piece 13 as a receiving portion integrally formed on the inner surface of the cylindrical cover portion 4B when the movable base member is moved to the maximum locking operation position, A state in which the stopper member 14 made of a leaf spring for restricting the return rotation of the cover body 4 to the outer fitting mounting operation position with respect to 2 can be elastically deformed to the disengagement position (the position shown by the broken line in FIG. 10). Installed in. The stopper member 14
Is attached to a cylindrical portion 16 formed integrally with the mounting base material 2 through a through hole 15 formed on the base end side thereof.
A screw 17 having a head having a diameter larger than that of the through hole 15 is attached to 6 so as to be retained and retained, and the base end side of the stopper member 14 is formed so as to bulge into the mounting base material 2. It is fixed against rotation by being brought into contact with the projection 18.

An intermediate portion of the stopper member 14 along the rotational direction of the cylindrical base 4A of the cover body 4 is formed in an inclined position such that the free end side of the stopper member 14 is closer to the mounting base 2 side. The stopper members 14 are moved as the locking pieces 5 at the outer fitting operation position move toward the maximum locking operation position by the rotation operation of the cylindrical base 4A.
The distal end surface 13A of the protruding piece 13 is pressed against and contacted with the inclined portion 14A.
The stopper member 14 is configured to be elastically deformed and deformed to the disengagement position. When each of the locking pieces 5 reaches the maximum locking operation position in the locking groove 6, the stopper member 14 rides over the protruding piece 13 and returns from the disengaged position to the engagement position (FIG. 11, the free end surface of the stopper member 14 is engaged with the side surface of the projecting piece 13 in a contact state.

In a state where each locking piece 5 of the cylindrical cover portion 4B of the cover body 4 is located at the maximum locking operation position in the locking groove 6, the stopper member 1 in the cylinder axis Y direction is provided.
4 is formed at a portion opposed to the free end side of the stopper member 14 at the engagement position through an operation hole 20 for externally changing the position of the stopper member 14 to the disengagement position.
This position changing operation is performed by inserting a driver or a dedicated operation jig from the outside into the cover body 4 through the operation hole 20 and pushing the stopper member 14 from the engagement position to the engagement release position side.

As shown in FIG. 7, when each locking piece 5 reaches the maximum locking operation position in the locking groove 6 on the inner peripheral surface 4a of the cylindrical base 4A of the cover body 4, Of the plurality of guide pieces 7, a guide piece 7A having the shortest length along the peripheral direction is in contact with the contact piece, and the contact piece restricts the relative rotation operation of the cylindrical base 4A with respect to the mounting base material 2 beyond that. A piece 19 is integrally formed.

As shown in FIG.
Is a cylindrical support member 21 rotatably connected to the mounting portion 3 of the cover body 4 around the cylindrical axis Y, and is swingable around the horizontal axis X at the lower end of the support member 21. The lamp 22 is mounted so as to be able to hold its posture by friction, and the connecting portion between the mounting portion 3 and the support member 21 has a rotation range of the support member 21 with respect to the cover body 4 of 360. Degrees or more and less than 720 degrees,
More specifically, a rotation range restricting portion 23 for restricting the rotation to approximately 370 degrees is provided. The lamp 22 is configured such that a reflection plate 26 is detachably attached to a lamp main body 25 provided with a lamp holder (not shown) for mounting and holding a lamp 24 such as a halogen bulb or a krypton bulb. A disc-shaped flange 27 is integrally formed on the upper end side of the support member 21, and is integrally formed to protrude further upward from the center of the disc-shaped flange 27 to form a cylindrical male screw. After inserting the portion 28 into the through hole 29 formed in the attaching portion 3 of the cover body 4, the nut 3
0 by screwing, the support member 2
1 is retained and retained.

Although not shown, the electric cord of the lamp 22 is led through the support member 21 to the outside through the upper end opening, and is formed through the through hole 31 formed in the center of the mounting base 2 from the ceiling surface 1 side. When the cover 4 is attached to the mounting base 2, the connection portion between the electric cord and the power cord is connected to the cylindrical cover portion 4 </ b> B of the cover 4. Covered
It is configured not to be exposed to the outside. Further, the electric cord is provided inside the tubular cover portion 4B of the cover body 4.
When tension is applied to the electric cord, it is held by a clip (not shown) capable of receiving the tension,
As shown in FIGS. 1 and 3, a screw hole 32 for screwing and fixing the clip is provided on the inner surface of the cylindrical cover portion 4B.
Is formed.

[Second Embodiment] FIGS. 12 and 13 show another embodiment of the first embodiment, in which each locking piece 5 along the cylinder axis Y direction of the tubular base 4A of the cover 4 is shown. The maximum width W1 between the engagement start end portion and the engagement rear end portion may be configured to be slightly larger than the facing distance W2 between the opposing locking surfaces 12 in the locking groove 6. In such a configuration, each of the locking pieces 5 is attached to the mounting base 2 from the external fitting operation position.
When the entire locking piece 5 engages with the corresponding locking groove 6 in accordance with the relative rotation operation of the cover body 4 with respect to, the respective locking pieces 5 are opposed to each other on both opposite locking surfaces 12 in the locking groove 6. As a result, each of the locking pieces 5 comes into contact with the opposing locking surfaces 12 in the locking groove 6 in an elastic pressure contact state. The other configuration is the same as that of the first embodiment. Components having the same configuration or the same function as the components described in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

[Third Embodiment] FIGS. 14 and 15 show a third embodiment of an apparatus for mounting a spotlight L as an example of a lighting fixture. When the cover body 4 at the stop operation position is rotated toward the outer fitting operation position side by an operating force of a certain degree or more, the cover body 4 is pressed against the distal end surface 13A of the protruding piece 13 as the receiving portion, and the stopper member 14 is engaged. The cam surface 33 that can be elastically deformed from the mating position to the disengagement position may be formed by bending the distal end side of the stopper member 14 into an inclined posture. The operation hole 2 for operating the stopper member 14 from the outside to the disengagement position is formed in the cylindrical cover portion 4B of the cover body 4 similarly to the first embodiment.
Since the cover member 4 is rotated to the outside fitting operation position side by a certain or more operating force, the stopper member 14 can be operated to change the position of the stopper member 14 to the disengagement position. Depending on the selection, a screwdriver or a dedicated operation jig is externally inserted into the cover body 4 through the operation hole 20, and the stopper member 14 is pushed toward the mounting base material 2, thereby positioning the stopper member 14 from the outside to the disengagement position. You can also change it. The other configuration is the same as that of the first embodiment. Components having the same configuration or the same function as the components described in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

[Other Embodiments] In the above embodiments, the locking pieces 5 are formed on the mounting base 2 and the locking grooves 6 are formed on the cylindrical base 4A of the cover body 4. However, the present invention is not limited to this configuration. Alternatively, the locking pieces 5 may be formed in the cylindrical base 4A of the cover 4 and the locking grooves 6 may be formed in the mounting base 2. In each of the above embodiments, the mounting base 2 made of sheet metal and the cover 4 made of aluminum die-cast have been described. However, the materials of the mounting base 2 and the cover 4 are not limited thereto. 2 may be made of aluminum die-cast or synthetic resin, the cover 4 may be made of sheet metal or synthetic resin, and the locking pieces 5 and the locking grooves 6 are formed according to the material. What is necessary is just to form by adopting a method. In each of the above embodiments, the support member 21 including the lamp 22 is connected to the attachment portion 3 of the cover body 4 via the rotation range restricting means 23.
The support member 21 having the lamp 22 may be directly connected and fixed. In the third embodiment, the operation hole 20 for externally operating the stopper member to the disengagement position may not be provided. In each of the above embodiments, the spotlight is described as an example of the lighting fixture L. However, the lighting fixture L is not limited to the spotlight as long as it is a lighting fixture that can be attached to the attachment part 3 of the cover body 4. Further, the shape of the mounting portion 3 of the cover body 4 and the mounting structure of the lighting device L to the mounting portion 3 of the cover body 4 may be appropriately changed according to the type and structure of the lighting device L.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of a lighting fixture mounting apparatus of the present invention, and is a perspective view of a mounting base and a cover body.

FIG. 2 is a bottom view of a mounting base material.

FIG. 3 is a plan view of a cover body.

FIG. 4 is a side view showing a state where the lighting fixture is mounted on a ceiling surface.

FIG. 5 is a cross-sectional view showing a state where a cover body is attached to an attachment base material.

FIG. 6 is a plan view showing a state where the cover body is at an external fitting operation position.

FIG. 7 is a plan view showing a state where the locking body is at a maximum locking operation position.

FIG. 8 is a cross-sectional view of a main part in a state where the locking body is at the outer fitting operation position.

FIG. 9 is a sectional view of a main part in a state where the locking body is at a maximum locking operation position.

FIG. 10 is a cross-sectional view of a main part in a state where the stopper member is at the outer fitting operation position.

FIG. 11 is a cross-sectional view of a main part in a state where the stopper member is at a maximum locking operation position.

FIG. 12 shows a second embodiment of the lighting fixture mounting apparatus of the present invention, and is a cross-sectional view of a main part in a state where a locking body is at an external fitting operation position.

FIG. 13 is a sectional view of a main part in a state where the locking body is at a maximum locking operation position.

FIG. 14 is a cross-sectional view of a main part of a third embodiment of a lighting fixture mounting apparatus according to the present invention, in which a stopper member is at an externally fitted operation position.

FIG. 15 is a sectional view of a main part in a state where the stopper member is at the maximum locking operation position.

[Explanation of symbols]

 Reference Signs List 1 mounting surface 2 mounting base 3 mounting portion 4 cover body 4A cylindrical base 5 locking piece 6 locking groove 12 locking surface 13 receiving portion 14 stopper member 20 operation hole 33 cam L lighting fixture Y cylindrical shaft core

Claims (5)

(57) [Claims] 1. A mounting base fixed to a mounting surface, a cylindrical base portion of a cover body provided with a mounting portion for a lighting fixture is relatively rotatable around its cylindrical axis and in a direction of the cylindrical axis. A plurality of latches which are detachably fitted to the outside and engage with each other on opposing surfaces of the mounting base and the tubular base of the cover body with a relative rotation operation from a detachable outside fitting operation position. A mounting device for a lighting fixture having a piece and a locking groove, wherein each of the locking pieces is opposed to each other in the locking groove with a relative rotation operation from the external fitting operation position. Lighting fixture mounting device configured to be in an inclined position in contact with both locking surfaces. 2. The lighting fixture mounting apparatus according to claim 1, wherein each of said locking pieces is configured to contact both opposing locking surfaces in said locking groove in an elastic pressure contact state. 3. The mounting base is formed on the inner surface of the cover body when each of the locking pieces in the detachable external fitting operation position is moved to the maximum locking operation position in the locking groove. A state in which the free end side engages with the receiving portion and the stopper member made of a leaf spring, which restricts the return rotation of the cover body to the external fitting operation position with respect to the mounting base member, is elastically deformable to the disengagement position. The lighting fixture mounting device according to claim 1 or 2, wherein the lighting device is mounted. 4. The lighting fixture mounting apparatus according to claim 3, wherein an operation hole for operating the stopper member from the outside to the disengagement position is formed in the cover body. 5. The stopper member engages with the stopper member when the cover body, which is in the maximum locking operation position with respect to the mounting base material, is rotated to the outer fitting operation position side by a certain operating force or more. 5. The lighting fixture mounting device according to claim 3, wherein a cam surface for elastically deforming is formed at the release position.