JPH06290632A - Box-form equipment body and luminaire using box-form equipment body - Google Patents

Abstract

PURPOSE:To obtain a box-form equipment body which has few number of part items and few manufacturing processes, and can prevent the generation of a flooding. CONSTITUTION:A polygonal bottom plate 25, and plural neighboring side plates 26 and 27 bent from the sides of the bottom plate 25, whose both side edges are abutted on each other, are formed of a single sheet of metal plate 20 integrally, and the neighboring side plates 26 and 27 are welded each other making no clearance, and connected. Plural bending pieces 29 and 30 bent from the side plates 26 and 27 continuously, whose both sides are abutted each other, are provided, and the neighboring bending pieces 29 and 30 are welded each other, so as to reinforce the opening edge of a box-form equipment body A, or to install an other part to the opening surface of the box-form box body A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box-shaped casing and a lighting fixture using the same.

[0002]

2. Description of the Related Art Conventionally, many devices have a metal box-shaped casing, but the box-shaped casing is formed by joining a plurality of metal plates. An example thereof is shown in FIG. This figure is an exploded perspective view showing the configuration of the box-shaped casing 1. The box-shaped housing 1 has a rectangular bottom plate 2 and side plates 3 and 4 located on the four sides of the bottom plate 2. The side plates 3 facing each other are formed continuously on both sides of the bottom plate 2 by bending a single metal plate. Side plates 4 that are orthogonal to and oppose the side plates 3 are formed independently, and welding pieces 5 that are spot-welded to the inner surfaces of the bottom plate 2 and the side plates 3 are formed on the side plates 4.

When the opening surface of the box-shaped casing 1 is reinforced or other parts are joined depending on the application, the side plates 3 and 4 are used.
The bent piece 6 is formed at the end of the. This conventional example is an example of a box-shaped casing 1 for a lighting device that illuminates the inside of a tunnel. That is, a lamp (not shown) and a circuit component (not shown) for connecting the lamp and a power source are mounted on the box-shaped casing 1, and the reinforcing frame 7 is spot-welded to the opening surface of the box-shaped casing 1. To be done. The reinforcing frame 7 is for holding a front frame (not shown) having a translucent plate facing the opening surface of the box-shaped casing 1, and includes ribs 8 parallel to the side plates 3 and 4, and ribs thereof. 8 and the rising piece 9 located inside. An annular packing (not shown) is fitted between the rib 8 and the rising piece 9 to prevent rainwater and the like from entering around the front frame.

[0004]

The conventional box-shaped casing 1 is
Although the side plates 3 facing each other are integrally formed with the bottom plate 2,
Since the other two side plates 4 are independently formed, the number of parts and spot welding points increase. Depending on the application
When a frame-shaped object such as the reinforcing frame 7 is fixed to the opening surface of the box-shaped casing 1, the number of parts and spot welding points are further increased. Thus, as the number of parts increases, the number of processing steps increases, and the dimensional shape after assembly becomes inaccurate due to variations in the size of individual parts. Furthermore, if there are many spot welding points, some of them may have gaps due to variations in component dimensions, which makes spot welding difficult, and the heat generated by the spot welding may deform the box-shaped casing 1.

The bent pieces 6 of the side plates 3 and 4 are inclined edges 11 on both sides so that they do not overlap each other when they are bent inward.
However, it is difficult to align the inclined edges 11 as shown in FIG. 9 (a). That is, the slanted edges 11 that abut each other are relatively slippery, and as shown in FIG. 9B, the position of the side plate 4 is easily displaced from the side plate 3, so that it is difficult to secure the dimensions, and particularly the side plates 3 and 3. There is a problem that welding becomes difficult due to the gap between the four.

When used as a box-shaped casing 1 for a lighting fixture used outdoors, it is necessary to prevent water from entering as described above. Therefore, the bottom plate 2 and the welding piece 5 of the side plate 3 and the side plate 4 are required. The putty is filled between the spot welding points between and. FIG. 10 is a partial cross-sectional view showing a state in which the putty 10 is filled in the gap after spot welding the bottom plate 2 and the welding piece 5. However, the putty 10 deteriorates when exposed to wind and rain, and therefore has low reliability in preventing water infiltration. Further, when the box-shaped casing 1 is used for a lighting fixture, the air pressure in the internal space of the box-shaped casing 1 having high airtightness is increased by the heat of the lamp, and the thermal expansion of the box-shaped casing 1 is increased. Therefore, there is a problem that the watertightness of the putty 10 is adversely affected.

[0007]

The invention according to claim 1 is
A polygonal bottom plate and a plurality of side plates that are bent from each side of the bottom plate and have both side edges abutting each other are integrally formed by a single metal plate, and both side edges of the adjacent side plates are welded together without a gap. Joined together.

According to a second aspect of the present invention, in the first aspect of the present invention, bending pieces respectively bent from the side plates are provided, and abutting edges on both sides of the bending pieces and abutting edges of adjacent bending pieces are provided. Welded and joined together without any gaps.

According to a third aspect of the present invention, in the second aspect of the invention, a plurality of bending pieces that are bent inward are formed continuously on the edge of the side plate.

According to a fourth aspect of the present invention, in the invention according to the second or third aspect, a specific bending piece and a bending piece adjacent to the bending piece are provided with at least two sides formed on each of them. Welded and joined without gaps by the contact edges.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the contact edge of the specific bending piece is two sides orthogonal to each other,
One of the two contact edges was used as a contact edge that abuts the edge of the adjacent side plate at a substantially right angle.

The invention according to claim 6 is the same as claim 1,
Inside the box-shaped housing described in 3, 4, or 5, a lamp and a circuit component for connecting the lamp and a power source were mounted.

[0013]

According to the first aspect of the present invention, the number of parts and welding points can be reduced, so that the manufacturing process can be shortened and the cost can be reduced. In addition, the dimensional accuracy of each part can be improved by reducing the number of parts. Further, by welding the both side edges of the adjacent side plates without any gap, it is possible to surely prevent water from entering without filling the putty.

According to the second aspect of the present invention, it is possible to reliably prevent water from entering and to reinforce the opening edge of the box-shaped housing with a bent piece.

According to a third aspect of the present invention, the shape of the bent piece that is sequentially bent inward from the edge of the side plate is arbitrarily set, so that the bent piece makes the opening surface of the box-shaped housing stronger. Can be used as a member to which other parts are attached depending on the purpose of use. Even in this case, the bending piece can be provided without increasing the number of parts at all.

According to the fourth aspect of the present invention, it is possible to reliably prevent water from entering and to reinforce the opening edge of the box-shaped housing with a bent piece.

According to the fifth aspect of the present invention, when the abutting edges are brought into contact with each other to bend the adjacent bending pieces, there is no sliding phenomenon between the bending pieces due to the abutting edges. It becomes easy to accurately determine the relative position of. Also,
It has been difficult to weld the adjacent bent pieces in a line contact state, but it is possible to minimize the contact length (welding length) between the bent pieces. Can be facilitated.

The invention according to claim 6 is the same as claim 1,
By mounting the lamp and the circuit component for connecting the lamp and the power source inside the box-shaped housing described in 3, 4, or 5, it is possible to provide an inexpensive lighting fixture capable of reliably preventing water from entering.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 (a) is a plan view showing a blank of the metal plate 20 necessary for forming one box-shaped housing,
The metal plate 20 is formed by punching out a metal plate such as an iron plate with a press, and projecting pieces 21 facing each other are formed on its long sides, and projecting pieces 22 facing each other are formed on its short sides. A mounting piece 23 for mounting a later-described reflector is formed on the projecting piece 22 so as to project therefrom.

By bending the metal plate 20 with a press, as shown in FIG. 1 (b), FIG. 2 (a), and FIG.
(B), a rectangular box-shaped casing A as shown in FIGS. 3 and 4 is formed. 1 (b) is a perspective view showing a corner of the box-shaped casing A, FIG. 2 (a) is a top view of the box-shaped casing A, FIG. 1 (b) is a partial top view thereof, and FIG. FIG. 4 is a vertical cross-sectional side view of a lighting fixture B using the box-shaped housing A, and FIG. 4 is a perspective view of the lighting fixture B seen from below.

Here, with respect to the position where the metal plate 20 is bent, the manufacturing process of the box-shaped housing A will be described with reference to FIG. By bending the base of each of the projecting pieces 21, 22 along the dotted line 24a, the bottom plate 25 and the side plates 26, 27 bent from the four sides thereof are formed. The side plate 26 is located on the long side of the bottom plate 25, and the side plate 27 is located on the short side of the bottom plate 25. In addition, the middle portions of the projecting pieces 21, 22 of the metal plate 20 are bent along the dotted line 28a, so that the side plates 26, 27 are formed.
Bending pieces 29 and 30 are formed so as to be bent inwardly from the respective edges thereof. Furthermore, the dotted line 3 at the tip of the protruding pieces 21, 22
By bending between 1a and 32a in a V shape, a rib 33 continuous with the bending pieces 29 and 30 is formed, and the protruding piece 2 is formed.
By bending the tips of the ribs 1 and 22 along the dotted line 32a, a concave portion 34 located inside the rib 33 and a rising piece 35 located inside thereof are formed. The rib 33, the concave portion 34, the rising piece 35, and the like are bent pieces that are continuous with the bent pieces 29 and 30 and are bent inward. in this case,
By making the protruding lengths of the protruding pieces 21 and 22 different from each other, as shown in FIGS. 1 (b) and 2 (b), the contact edges 29a on both sides of the bending piece 29 located on the long side are formed. The outer diameter of the blank of the metal plate 20 is such that the contact edges 30a on both sides of the bent piece 30 located on the short side are contacted at a right angle, but both ends of the bent pieces 30, 31 are contacted obliquely at the tip. The shape is fixed. Here, dotted lines 24a, 28a, in FIG.
31a and 32a and the bent portions 24 and 2 in FIG.
There is a correspondence relationship with 8, 31, 32. Thus, the side plates 26 and 27, which are adjacent to each other, and the bent pieces 29 and 3
The zeros are joined by welding their abutting edges without any gaps.

Next, FIG. 3 and FIG. 4 show a luminaire B using such a box-shaped casing A. As shown in FIG. 3, a board 36 is fixed to the bottom plate 25 of the box-shaped housing A, and a socket (not shown) for holding a single-ended die discharge lamp 37 as a lamp is fixed to the side plate 27. This discharge lamp 37
A reflection plate 38 covering the back surface of the is attached to the attachment piece 23 with a screw 39. On the board 36, a ballast 40 as a circuit component, another circuit component not shown, a terminal block 41, and a cable retainer 42 for retaining a cable (not shown) for wiring.
Etc. are provided. In addition, on the opening surface of the box-shaped casing A,
A front frame 44 surrounding the transparent plate 43 is provided. An annular packing 45 that seals between the box-shaped casing A and the front frame 44 is fitted in the recess 34 between the rib 33 of the box-shaped casing A and the rising piece 35.

As shown in FIG. 4, a hinge 46 for rotatably supporting the front frame 44 is provided on one side of the box type casing A, and a front frame 44 is provided on the other side of the box type casing A. A clamp 47 that holds the open / close position is provided. A mounting plate 48 is mounted on the bottom plate 25 of the box-shaped housing A to mount the lighting fixture B at a desired position.

In such a structure, at least a polygonal bottom plate 25 and a plurality of side plates 26, 27 that are bent from each side of the bottom plate 25 and abut both side edges with each other are integrated by a single metal plate 20. Formed on the adjacent side plates 26, 2
By manufacturing the box-shaped housing A by welding the seven members to each other by welding both side edges thereof without any gap, it is possible to reduce the number of parts and the number of welding points. Therefore, the manufacturing process can be shortened and the cost can be reduced. In addition, the dimensional accuracy of each part can be improved by reducing the number of parts. Further, by welding the both side edges of the adjacent side plates 26 and 27 without any gap, it is possible to reliably prevent water from being infiltrated without filling the putty. This is an action corresponding to the invention of claim 1.

Further, a plurality of bending pieces 29, 30 are provided which are bent from the upper edges of the side plates 26, 27 and abut each other on both sides, and the adjacent bending pieces 29, 30 are welded together without any gap. By coupling, it is possible to reliably prevent water from entering and to reinforce the opening edge of the box-shaped casing A. This is an action corresponding to the inventions of claims 2 and 4. Further, the rib 33, the concave portion 34, and the rising piece 35 are formed by being bent continuously from the bent pieces 29 and 30, so that the opening surface of the box-shaped housing A is further reinforced and other parts such as the front frame 44 are formed. Can be attached. Even in this case, the bending pieces 29, 30, the ribs 33, the recesses 34, the rising pieces 35, etc. can be provided without increasing the number of parts at all. This is an action corresponding to the invention of claim 3.

Further, as shown in FIG. 1B, when 29 is a specific bent piece, the contact edge 29 of the bent piece 29 is
a and 29a 'are two orthogonal sides, and one of the two contact edges 29a and 29a' is in contact with the upper edge 27a of the adjacent side plate 27 at a substantially right angle. By doing so, there is no slippage phenomenon between the bending pieces 29, 30 and it becomes easy to accurately determine the relative position of the bending pieces 29, 30. Since adjacent bending pieces 29, 30 are in contact with each other in a line contact state, it has been conventionally difficult to weld them. However, according to the present embodiment, the length of the contact portion between the bending pieces 29, 30, that is, Since the contact length (welding length) of the contact edges 29a and 30a can be minimized, the bending pieces 29 and 30 can be easily welded to each other.
This is an action corresponding to the invention of claim 5.

Further, by providing circuit components such as the discharge lamp 37 and the ballast 40 inside the box-shaped casing A as described above, it is possible to provide an inexpensive lighting fixture B capable of reliably preventing water from entering. You can This is an action corresponding to the invention of claim 6.

Next, FIG. 5 shows an example in which the shapes of the bending pieces 29, 30 are changed. In the same figure as in the above embodiment, one of the contact edges 29a, 29a 'of two orthogonal sides of the bending piece 29 has one contact edge 29a' which is an end edge 27 of the adjacent side plate 27.
This is an example in which a contact edge 29a 'that abuts a at a substantially right angle is used.
FIG. 2B shows the contact edge 29 of the adjacent bent pieces 29, 30.
This is an example in which b and 30b are inclined and brought into contact with the side plates 26 and 27. In the same figure (c), adjacent bending pieces 29,
This is an example in which the contact edges 29c and 30c of 30 are in contact with each other in a V-shape. In this case, the contact edges 29c, 30
Since there is no slippage between c, the adjacent side plates 26, 27
It is easy to prevent the positional deviation between the bending pieces 29 and 30. The same figure (d) shows the contact edge 29d of the bending piece 29.
This is an example in which the abutting edge 30d of the bent piece 30 is abutted in an arc shape as a continuous side.

Next, a second embodiment of the present invention will be described with reference to FIG. The same parts as those in the above-described embodiment are designated by the same reference numerals and the description thereof is omitted (the same applies hereinafter). The box-shaped casing C in this embodiment includes a hexagonal bottom plate 25, side plates 26 bent from each side of the bottom plate 25, and bent pieces bent inward from the end edges of the side plates 26. 29 and 29 are integrally formed by a single metal plate, and abutting edges formed on both side edges of the adjacent side plate 26 and bending piece 29 are welded.

Further, a third embodiment of the present invention will be described with reference to FIG. The box-shaped housing D in this embodiment is a rectangular bottom plate 25, side plates 26 and 27 bent from each side of the bottom plate 25, and outwardly bent from the end edges of these side plates 26 and 27. The bent pieces 29, 30 are integrally formed of a single metal plate, and the contact edges formed on both side edges of the adjacent side plates 26, 27 and the bent pieces 29, 30 are welded. In this example, the adjacent bending pieces 29 and 30 are formed in a shape in which the contact edges of two orthogonal sides are in contact with each other.

[0031]

According to the first aspect of the present invention, a polygonal bottom plate and a plurality of side plates that are bent from each side of the bottom plate and contact with each other at both side edges are integrally formed by a single metal plate. ,
Since both side edges of the adjacent side plates are welded and joined together without a gap, the number of parts and the number of welded parts can be reduced, so that the manufacturing process can be shortened, cost can be reduced, and the number of parts can be reduced. Thereby, the dimensional accuracy of each part can be improved. Further, by welding the both side edges of the adjacent side plates in a state where there is no gap, it is possible to reliably prevent water from entering without filling the putty.

According to a second aspect of the present invention, in the first aspect of the present invention, bent pieces that are respectively bent from the side plates are provided, and abutting edges on both sides of the bent pieces and abutting edges of adjacent bent pieces are provided. Since they are welded and joined together without any gap, it is possible to reliably prevent water from entering and to reinforce the opening edge of the box-shaped housing with a bent piece.

According to a third aspect of the present invention, in the second aspect of the invention, a plurality of bent pieces that are bent inward are successively formed at the edge of the side plate. By arbitrarily setting the shape of the bending pieces that are bent inward sequentially, the opening pieces of the box-shaped housing can be reinforced more strongly by the bending pieces, and other bending pieces can be used depending on the purpose of use. It can be used as a member to which parts are attached, and in this case also, it is possible to provide bent pieces without increasing the number of parts at all.

According to a fourth aspect of the present invention, in the invention according to the second or third aspect, a specific bending piece and a bending piece adjacent to the bending piece are provided on at least two sides formed on each of them. Since the welded portions are joined together without any gaps by the contact edges, it is possible to reliably prevent water from entering and to reinforce the opening edge of the box-shaped housing with the bent pieces.

According to a fifth aspect of the present invention, in the invention according to the fourth aspect, the contact edges of the specific bent pieces are two sides that are orthogonal to each other, and one of the two contact edges is adjacent. Since the abutting edge that abuts the edge of the side plate at a substantially right angle is used, when the abutting edges are abutted to bend the adjacent bent pieces, there is no sliding phenomenon between the bent pieces due to the abutting edges. , This makes it easy to accurately determine the relative position of the bending pieces, and since adjacent bending pieces abut each other in a line contact state, it has been difficult to weld conventionally, but the contact length of the bending pieces is long. Since the length (welding length) can be minimized, there is an effect that welding of bent pieces can be facilitated.

The invention according to claim 6 is the same as claims 1, 2 and
Since the lamp and the circuit parts for connecting the lamp and the power source are mounted inside the box-shaped housing described in 3, 4, or 5, it is possible to provide an inexpensive lighting fixture capable of reliably preventing water from entering. Have.

[Brief description of drawings]

1A is a plan view of a metal plate according to an embodiment of the present invention, and FIG. 1B is a perspective view of a part of a box-shaped housing formed by bending a metal plate.

FIG. 2 shows a box-shaped housing, (a) is a top view,
(B) is a partial top view.

FIG. 3 is a vertical side view of the lighting fixture.

FIG. 4 is a perspective view of the lighting fixture as viewed from below.

FIG. 5 is a partial plan view showing another shape of the bending piece.

FIG. 6 is a plan view of a box-type housing according to the second embodiment of the present invention.

FIG. 7 is a perspective view of a box type housing according to a third embodiment of the present invention.

FIG. 8 is an exploded perspective view showing a conventional example.

FIG. 9 is a partial plan view showing a contact state of bent pieces.

FIG. 10 is a partial cross-sectional view showing a state in which putty is filled between the bottom plate and the welding piece.

[Explanation of symbols]

 20 metal plate 26, 27 side plate 27a end edge of side plate 29, 30 bending piece 33 to 35 bending piece 29a, 29a 'to 29d contact edge of bending piece 30a to 30d contact edge of bending piece 37 lamp 41 circuit component A, C, D box type housing

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shoji Wada 2-11-1, Fukuura, Kanazawa-ku, Yokohama-shi, Kanagawa Yokohama Kiko Co., Ltd. Inside the litec corporation (72) Inventor Nobuo Matsushita 1-28-3 Mita, Minato-ku, Tokyo TOSHIBA lite Corporation Inside (72) Inoue Tadashi Ryoji 4-28 Mita, Minato-ku, Tokyo Inside Tech Co., Ltd.

Claims (6)

[Claims] 1. A polygonal bottom plate and a plurality of side plates that are bent from each side of the bottom plate and contact each other at their side edges are integrally formed of a single metal plate, and both side edges of the adjacent side plates are integrally formed. A box-shaped housing that is welded together and joined together. 2. A bent piece that is bent from each of the side plates is provided, and the contact edges on both sides of the bent piece and the contact edges of the adjacent bent pieces that are adjacent to each other are welded together without a gap. The box-shaped housing according to claim 1. 3. The box-shaped casing according to claim 2, wherein a plurality of bent pieces that are bent inward are successively formed at the edge of the side plate. 4. The specific bending piece and a bending piece adjacent to the bending piece are welded and joined together without a gap by at least two abutting edges formed on each of the bending pieces. The box-shaped housing according to claim 2. 5. A specific contact edge of the bent piece is two orthogonal sides, and one of the two contact edges is in contact with an edge of an adjacent side plate at a substantially right angle. The box-shaped housing according to claim 4, wherein 6. A luminaire, wherein a lamp and a circuit component for connecting the lamp and a power source are mounted inside the box-shaped casing according to claim 1, 2, 3, 4 or 5.