JP2006127813A - Fixture and luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixture capable of suppressing a creak caused by the difference between coefficients of thermal expansion of two members connected to each other; and to provide a luminaire. <P>SOLUTION: In this fixture 1 for a shade used for connecting a frame body 7 being a first member and a shade 5 being a second member to each other, a part for connecting a part connected to the frame body 7 to a part connected to the shade 5 has elasticity in a direction varying the distance between the part connected to the frame body 7 and the shade 5. Even when the coefficient of thermal expansion of the frame body 7 is different from that of the shade 5, distortion due to the difference between the coefficients of thermal expansion is absorbed by elastic deformation of the fixture 1 for a shade, whereby the creak is suppressed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fixture for coupling two members to each other and a lighting fixture in which a frame is coupled to a shade by the fixture.

  2. Description of the Related Art Conventionally, there has been provided a lighting fixture in which an opening of a shade is covered with a translucent panel by attaching a frame body holding the translucent panel to the shade (see, for example, Patent Document 1).

  An example of this type of lighting fixture is shown in FIG. The lighting fixture includes a socket 3 to which a lamp La as a light source is attached, a holder 4 that is cylindrical and has one end fixed to the ceiling surface C, holds the socket 3 inside, and constitutes the fixture body together with the socket 3, a holder 4 and a shade 5 that distributes the light of the lamp La.

  The holder 4 is made of, for example, aluminum die cast, and has flange portions 41 and 42 projecting outward around the openings at both ends. One flange portion 41 is screwed to the ceiling surface, and the other flange portion 42 is screwed to the shade 5.

  The shade 5 is made of, for example, a synthetic resin, and is formed in the shape of a slot having a larger inner diameter and outer diameter at a position closer to the lower end portion. The upper end portion has an opening through which the lamp La is inserted, and the lower end portion has a lamp La. Has an opening through which the light is derived. Hereinafter, when the opening of the shade 5 is simply referred to, the opening of the lower end portion of the shade 5 is indicated.

  The opening of the shade 5 is covered with a translucent panel 6 made of a translucent material. The translucent panel 6 is held by an annular frame 7, and the translucent panel 6 is attached to the shade 5 by attaching the frame 7 to the shade 5. The inner diameter of the lower end portion of the frame body 7 is approximately the same as the inner diameter of the opening of the shade 5.

Here, materials having different coefficients of thermal expansion are often used for the shade 5 and the frame body 7. For example, when the shade 5 is made of acrylic resin (linear expansion coefficient 8 × 10 ⁻⁵ (1 / ° C.)) and the frame body 7 is made of iron (linear expansion coefficient 1.2 × 10 ⁻⁵ (1 / ° C.)) think of. When the lamp La is, for example, a 150 W mercury lamp, the temperature of the frame 7 may be about 80 ° C. At this time, assuming that the outer diameter of the end portion on the opening side of the shade 5 is 400 mm, the shade 5 expands by about 1.6 mm more than the frame 7 as compared with the case of 20 ° C. In such a case, if the shade 5 is directly fixed to the frame body 7, the shade 5 may be cracked.

  Therefore, conventionally, as shown in FIG. 11, a flange portion 51 protrudes outward from the entire circumference of the opening of the shade 5, and a cylindrical body portion 71 surrounding the shade 5 is provided on the frame body 7. The frame body 7 is coupled to the shade 5 by bringing the screw S4 screwed into the portion 71 into contact with the upper surface of the flange portion 51 of the shade 5. If this structure is employ | adopted, when the screw S4 slides on the flange part 51 of the shade 5, the difference of the thermal expansion coefficient of the shade 5 and the frame 7 is absorbed, and the crack of the shade 5 is prevented. .

In addition, the translucent panel 6 and the frame 7 are often made of materials having different coefficients of thermal expansion. For example, the translucent panel 6 is made of glass (linear expansion coefficient 0.8 × 10 ⁻⁵ (1 / ° C.)), and the frame body 7 is made of aluminum (linear expansion coefficient 2.4 × 10 ⁻⁵ (1 / ° C.)). Consider the case. For example, when the lamp La is a mercury lamp of 400 W, the temperature of the translucent panel 6 may be about 200 ° C. At this time, if the outer diameter of the translucent panel 6 is 400 mm, the frame body 7 expands by about 1.2 mm more than the translucent panel 6 as compared with the case of 20 ° C. In such a case, if the translucent panel 6 is directly fixed to the frame body 7, the translucent panel 6 may be cracked.

Therefore, conventionally, as shown in FIGS. 10 and 11, a packing 61 is provided around the translucent panel 6, and a ring-shaped support projecting inward from the lower end of the main body 71 on the frame body 7. The translucent panel 6 is held on the frame body 7 by providing the portion 72 and sandwiching the packing 61 between the presser plate 8 screwed to the spacer 73 provided on the support portion 72 and the support portion 72. If this configuration is adopted, the difference in thermal expansion coefficient between the translucent panel 6 and the frame body 7 is absorbed by elastic deformation of the packing 61 and sliding movement of the packing 61 between the presser plate 8 and the support portion 72. Thus, cracking of the translucent panel 6 is prevented.
Japanese Utility Model Publication No. 5-77812

  However, since the frame 7 is supported by the flange portion 51 of the shade 5 in the conventional example, the frame 7 is supported even if the shade 5 is deformed due to factors other than thermal expansion such as impact. Therefore, it is necessary to enlarge the flange portion 51 of the shade 5. Therefore, it is necessary to increase the width W in the radial direction of the support portion 72 of the frame body 7 in accordance with the flange portion 51 of the shade 5, and the appearance is poor. Further, a squeaking noise may occur when the screw S4 slides on the flange portion 51.

  Further, since the elastic deformation of the packing 61 and the sliding movement of the packing 61 between the presser plate 8 and the support portion 72 absorb the difference in thermal expansion coefficient between the translucent panel 6 and the frame body 7, The packing 61 was liable to deteriorate due to the stress. In addition, a squeaking noise may occur when the packing 61 slides between the presser plate 8 and the support portion 72. Furthermore, since it was necessary to ensure the width dimension W of the support part 72 in the radial direction in order to provide the spacer 73, the appearance was poor.

  This invention is made | formed in view of the said reason, The objective is to provide the fixing tool and lighting fixture which can suppress the stagnation by the difference of the thermal expansion coefficient between the two members couple | bonded together. is there.

  According to the first aspect of the present invention, a ring-shaped first member and a second member having an outer diameter smaller than the inner diameter of the first member are mutually connected so that the first member surrounds the second member. A fixing device to be coupled, a first fixing portion that is coupled to the first member, and a second fixing that is coupled to the second member at a position aligned with the first fixing portion in the circumferential direction of the first member. And a connecting portion that connects the first fixing portion and the second fixing portion, and the connecting portion has elasticity in a direction in which the distance between the first fixing portion and the second member is changed. It is characterized by that.

  According to this invention, even when the first member and the second member have different coefficients of thermal expansion, distortion due to the difference in coefficient of thermal expansion is absorbed by the elastic deformation of the connecting portion, so that itching is suppressed. .

  According to a second aspect of the present invention, in the first aspect of the invention, the connecting portion is less likely to be elastically deformed in a direction that is easily elastically deformed in a direction orthogonal to a direction in which the first fixed portion and the second fixed portion are arranged. And a direction in which elastic deformation is easily caused to coincide with a direction in which the distance between the first fixed portion and the second member is changed.

  According to the present invention, the deformation of the connecting portion in the direction in which the first member falls off the second member is prevented while securing the effect of absorbing the distortion due to the difference in thermal expansion coefficient.

  According to a third aspect of the present invention, there is provided an instrument main body for holding a light source, a shade attached to the instrument main body, having an opening therein, storing the light source inside the opening and distributing light from the light source, and an annular frame surrounding the shade. And a translucent panel made of a light-transmitting material and held by the frame and covering the opening of the shade, wherein the first member is a frame and the second member is a shade. The frame and the shade are combined by the fixing tool described.

  According to this invention, even if the frame and the shade are made of materials having different thermal expansion coefficients, distortion due to the difference in thermal expansion coefficient is absorbed by the fixture, and stagnation is suppressed.

  In the fixture according to the present invention, the connecting portion that connects the first fixing portion that is coupled to the first member and the second fixing portion that is coupled to the second member is the first fixing portion and the second member. Therefore, even when the first member and the second member have different coefficients of thermal expansion, strain due to the difference in coefficient of thermal expansion is absorbed by the elastic deformation of the connecting portion. Therefore, itching is suppressed. In the lighting fixture of the present invention, the first member is a frame, the second member is a shade, and the frame and the shade are joined by the fixture, so that the frame and the shade are thermally expanded from each other. Even if it is comprised with the material from which a rate differs, the distortion by the difference in a thermal expansion coefficient is absorbed by a fixing tool, and stagnation is suppressed.

  The best mode for carrying out the present invention will be described below with reference to the drawings. In addition, since the basic composition of the lighting fixture in this embodiment is common with the lighting fixture demonstrated by the prior art example, about the common structure, the same code | symbol is attached | subjected and illustration and description are abbreviate | omitted.

  In the present embodiment, as shown in FIG. 1, the frame 7 as the first member and the shade 5 as the second member are coupled to each other using the fixture 1 for the shade as shown in FIG. The frame 7 as the first member and the translucent panel 6 as the second member are coupled to each other using the panel fixture 2.

  First, the shade fixing tool 1 will be described in detail. As shown in FIG. 2, the sewn fixture 1 includes a body fitting 11 and an auxiliary fitting 12 coupled to the body fitting 11. The main metal fitting 11 and the auxiliary metal fitting 12 are formed, for example, by punching or bending a metal plate.

  The metal shell 11 has a rectangular shape, a main body portion 11c having a screw hole 11a penetrating at one end and a rivet hole 11b penetrating at the other end, and a short side of the main body portion 11c in the vicinity of the rivet hole 11b. It has a support part 11d protruding from the one end part in the thickness direction of the main body part 11c, and a sandwiching part 11e protruding from the tip of the support part 11d and facing the main body part 11c. Further, the main body 11 is bent in the opposite direction between the vicinity of the screw hole 11a and the vicinity of the rivet hole 11b, and the portion near the rivet hole 11b protrudes in the protruding direction of the support portion 11d with respect to the portion near the screw hole 11a. Thus, the central portion of the main body portion 11c in the longitudinal direction is inclined. Here, the interval between the sandwiching portion 11 e and the main body portion 11 c is slightly larger than the width dimension of the flange portion 51 of the shade 5. In addition, a counter sink 11f is provided around the screw hole 11a of the main body portion 11c and protrudes on the same side as the support portion 11d.

  The auxiliary metal fitting 12 has a rectangular main body portion 12b through which a rivet hole 12a is provided, and a presser portion 12c projecting from one end of the main body portion 12b in the thickness direction of the main body portion 12b. It is formed in a letter shape.

  In order to fix the shade fixing tool 1 to the shade 5, first, the flange portion 51 of the shade 5 is inserted between the sandwiching portion 11e and the main body portion 11c. Next, the holding portion 12c of the auxiliary metal fitting 12 is directed toward the support portion 11d, the rivet holes 11b of the main body metal fitting 11 and the rivet holes 12a of the auxiliary metal fitting 12 are aligned, and the rivet R inserted through both the rivet holes 11b and 12a. The auxiliary metal fitting 12 is fixed to the body metal fitting 11 by caulking. Here, as shown in FIG. 3, the flange portion 51 of the shade 5 is sandwiched between the holding portion 12 c of the auxiliary metal fitting 12 and the support portion 11 d of the main body metal fitting 11. That is, the vicinity of the rivet hole 11b of the main body metal part 11, the support part 11d, the sandwiching part 11e, and the auxiliary metal part 12 constitute the second fixing part 10b.

  Further, in order to fix the shade fixing tool 1 to the frame body 7, as shown in FIG. 4, the screw S <b> 1 inserted through the through hole 71 a provided in the main body portion 71 of the frame body 7 is used as the screw hole 11 a of the main body bracket 11. Screwed on. That is, the vicinity of the screw hole 11a of the main body metal 11 is the first fixing portion 10a. Further, the central portion of the main body 11 of the main body 11 in the longitudinal direction is the connecting portion 10c. In the state where the shade 5 and the frame body 7 are combined, the first fixing portion 10a and the second fixing portion 10b are arranged in the circumferential direction of the frame body 7, and the connecting portion 10c is the thickness direction of the main body portion 11c. That is, the direction that intersects the direction in which the first fixing portion 10a and the second fixing portion 10b are arranged and changes the distance between the first fixing portion 10a and the shade 5 (the radial direction of the frame body 7). Has elasticity. Further, since the shade fixing tool 1 is not easily deformed in the short direction of the main body portion 11c, there is no possibility that the position of the frame body 7 is shifted up and down.

  Next, the panel fixture 2 will be described. The panel fixture 2 is formed by punching or bending a metal plate, for example, and as shown in FIG. 5, a rectangular main body 2b having a screw hole 2a penetrating at one end in the longitudinal direction. The extension part 2c, which is extended from the end part in the longitudinal direction of the main body part 21 and away from the screw hole 2a, is formed narrower than the main body part 2b, and protrudes from the extension part 2c. The main body 2b includes sandwiching portions 2d and 2e facing each other in the short direction. Further, a counter sink 2f protruding in the same direction as the sandwiching portions 2d and 2e is provided around the screw hole 2a. The width of the gap between the sandwiching portions 2 d and 2 e is slightly larger than the thickness dimension of the translucent panel 6. Further, the boundary between the main body 2b and the extension 2c and the vicinity of the screw hole in the main body 2b are bent in opposite directions, and the central portion in the longitudinal direction of the main body 2b is extended between the extension 2c and the screw hole 2a. The extension part 2c is inclined with respect to the vicinity so as to project in the projecting direction of the sandwiching parts 2d and 2e.

  As shown in FIG. 6, the panel fixture 2 is coupled to the translucent panel 6 by sandwiching the translucent panel 6 between the sandwiching portions 2 d and 2 e, and penetrates the main body 71 of the frame body 7. The frame 7 is coupled by being screwed to the frame 7 with a screw S2 that passes through a hole (not shown) and is screwed into the screw hole 2a. That is, in the panel fixture 2, the vicinity of the screw hole 2a becomes the first fixing portion 20a, the extension portion 2c and the sandwiching portions 2d and 2e become the second fixing portion 20b, and the central portion in the longitudinal direction of the main body portion 2b is connected. It becomes part 20c. Here, the first fixing portion 20 a and the second fixing portion 20 b are arranged in the circumferential direction of the frame body 7. Further, the connecting portion 20c is a direction that intersects the thickness direction of the main body portion 2b, that is, the direction in which the first fixing portion 20a and the second fixing portion 20b are arranged, and the first fixing portion 20b and the light transmitting portion. It has elasticity in the direction in which the distance to the panel 6 is changed (the radial direction of the frame body 7). Since the connecting portion 20c is not easily deformed in the lateral direction of the main body portion 2b, a gap is formed between the support portion 72 of the frame body 7 and the sandwiching portion 2e on the frame body 7 side so that the sandwiching portion of the panel fixture 2 is sandwiched between them. 2e and the support portion 72 of the frame body 7 can be prevented from rubbing and the generation of squeaking noise can be prevented.

  Here, only one shade fixing device 1 and one panel fixing device 2 are shown, but a plurality of them are used by shifting their positions in the circumferential direction of the frame 7, for example, four shifting positions by 90 °. It is desirable to use it.

  According to the said structure, the distortion by the difference of the thermal expansion coefficient of the shade 5 and the frame 7 is absorbed by the elastic deformation of the shade fixing tool 1, and is based on the difference of the thermal expansion coefficient of the translucent panel 6 and the frame 7. Since the distortion is absorbed by the elastic deformation of the panel fixture 2, itching is suppressed. Furthermore, compared with the case where the frame body 7 is supported by the screw S4 sliding on the flange portion 51 of the shade 5 as in the conventional example, or when the spacer 73 is provided on the frame body 7, the support portion 72 of the frame body 7 is provided. The width dimension W in the radial direction can be reduced to improve the appearance.

  In addition, the method of fixing the shade fixing tool 1 or the panel fixing tool 2 to the shade 5, the translucent panel 6, or the frame 7 is not limited to the method described above. For example, in the shade fixing tool 1, a screw hole 11g is provided as shown in FIG. 7 instead of the rivet hole 11b, the support part 11d, the sandwiching part 11e, and the auxiliary fitting 12, and the screw S3 is provided as shown in FIG. You may fix the shade fixing tool 1 to the shade 5 by the screwing used. In this case, the second fixing portion 10b is in the vicinity of the screw hole 11g and can be attached to the shade 5 without the flange portion 51.

It is a top view which shows the fixture for shades of embodiment of this invention. It is a disassembled perspective view which shows the fixing tool for shades same as the above. It is the perspective view which fractured | ruptured partially which showed the mode of a coupling | bonding of the fixture for shades same as the above, and a shade. It is a perspective view which shows the principal part of a frame same as the above. It is a perspective view which shows the mode of a coupling | bonding of the fixture for panels same as the above, and a frame. It is a top view which shows the fixing fixture vicinity for a panel same as the above. It is a perspective view which shows the fixing tool for shades in another form same as the above. It is a top view which shows the fixture for shades of another form same as the above. It is the partially broken front view which shows the conventional lighting fixture. It is a perspective view which shows the principal part of a frame same as the above and a translucent panel. It is sectional drawing which shows the principal part same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seed fixture 2 Panel fixture 5 Seed 6 Translucent panel 7 Frame 10a, 20a 1st fixing | fixed part 10b, 20b 2nd fixing | fixed part 10c, 20c Connection part La lamp

Claims (3)

A fixing tool that couples a ring-shaped first member and a second member having an outer diameter smaller than the inner diameter of the first member to each other such that the first member surrounds the second member. ,
A first fixing portion coupled to the first member; a second fixing portion coupled to the second member at a position aligned with the first fixing portion in a circumferential direction of the first member; and a first fixing portion And a connecting part that connects the second fixing part,
The connecting part has elasticity in a direction in which the distance between the first fixing part and the second member is changed.   The connecting portion has a direction that is easily elastically deformed and a direction that is not easily elastically deformed among directions orthogonal to the direction in which the first fixed portion and the second fixed portion are arranged, and the direction that is easily elastically deformed is the first direction. The fixture according to claim 1, wherein the distance between the fixing portion and the second member is made to coincide with the direction in which the distance is changed. An instrument body that holds the light source, a shade that is attached to the instrument body, has an opening, houses the light source inside the opening, and distributes light from the light source, an annular frame that surrounds the shade, and translucency A transparent panel that is made of a material and is held by a frame and covers the opening of the shade,
A lighting apparatus comprising: a frame member and a shade that are joined together by the fixture according to claim 1 or 2, wherein the first member is a frame member and the second member is a shade member.

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