JP2003065673A - Control box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control box, excellent in appearance and inexpensive in cost, by reducing the number of parts and working man-hours. SOLUTION: A mounting plate 18 for mounting an alarm buzzer 12 is provided with a fixing surface 19, made of a metal to weld and fix the same to the rear surface 7 of a lid body 5, a vertical surface 20 and an alarm buzzer mounting surface 21 while the fixing surface 19 is welded and fixed to the vicinity of a side surface plate 13 at the substantially central part in the up-and- down direction of the lid body 5. Mounting holes 22 for mounting the alarm buzzer 12 are formed on the alarm buzzer mounting surface 21 while the alarm buzzer 12 is fixed to the alarm buzzer mounting surface 21 through screws 24. A retaining plate 26, faced to the side of a main body 4, is formed integrally with an end part approximated to a flange 17 while a retaining hole 27 for retaining the lid body 5 for the control box 3 under the closed condition of the same is formed on the retaining plate 26.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control box suitably used for controlling applications such as prefabricated refrigerators and refrigerators, and more particularly to a control box for mounting electric parts and a cover. The present invention relates to a control box that can reduce the number of components of a locking member that locks to a box main body and can also reduce mounting traces such as spot welding. 2. Description of the Related Art As an example, a control box having a built-in electrical control circuit board for controlling the driving of a refrigerating apparatus or the like based on a temperature change in a refrigerator is mounted on a wall surface of a prefabricated refrigerator or the like. ing. FIG. 4 is a schematic perspective view showing a state in which a lid of a conventional control box is opened. The control box 3 has a substantially box-shaped main body 4 having a front surface entirely opened, and It is fixed with screws etc. on the left side by a hinge not shown,
And a lid 5 for opening and closing the opening of the main body 4. A control circuit board 8 and a display circuit board 9 are mounted above the bottom surface 6 of the main body 4 and the back surface 7 of the lid 5 with screws 38 via corresponding board mounting plates 10 and 10, respectively. I have. A mounting plate 11 is welded and fixed to the back surface 7 of the lid 5, and an alarm buzzer 12 that emits an alarm sound when an abnormality such as an internal temperature abnormality is screwed to the mounting plate 11. Further, a locking plate 14 for keeping the main body 4 and the lid 5 always closed is attached to the inner side of the side plate 13 of the lid 5. This locking plate 1
4 is formed in a crank shape in cross section, and one end thereof is welded and fixed to the inner surface of the side plate 13. In addition, the other end is set to have a size to enter the inside of the locking hole 15 formed on the right side surface of the main body 4 when the lid 5 is closed, and the locking hole 16 is formed, and the other end side is formed on the main body side. It is inserted and fixed by a screw into the provided locking hole 15. In addition, inwardly bent flanges 17 are formed at the opening peripheral portions of the main body 4 and the lid 5, respectively, and the upper surface of the flange 17 on the main body 4 side when the lid 5 is closed is formed. A sealing material (not shown) is attached to improve the sealing performance. Further, electrical components (not shown) such as a relay and a capacitor are arranged in a space below the main body 4 and the lid 5. [0004] However, in the above-mentioned conventional control box 3, the metal locking plate 14 is fixed to the side plate 13 of the lid 5 by spot welding. However, there is a problem that the spot mark is exposed on the side surface of the control box 3 and a post-process such as a surface treatment operation is required. As a countermeasure, the locking plate 14
May be attached to the back surface 10, but there is a drawback that the length of the locking plate 14 is increased and the strength is reduced. Therefore, if the locking plate 14 is integrally formed in advance with the flange 17 of the lid 5 using a resin material, the above-mentioned problem can be solved. However, since the structure of the locking portion is complicated, a molding die is used. A new difficulty is pointed out that the cost increases and the profitability of products manufactured in a small number of products becomes unfit. SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems suitably, and has been made to reduce the number of parts and the number of working steps, and to provide an inexpensive control box having a good appearance. The purpose is to provide. [0006] In order to overcome the above-mentioned problems and achieve the desired object, a control box according to the present invention comprises a substantially box-shaped main body having an opening on a front surface thereof, A lid for opening and closing the opening, a mounting member for mounting a required electric component to at least one of the inside of the main body and the inside of the lid, and a lid that is always kept closed with respect to the main body In a control box including a locking member, the mounting member and the locking member are integrally formed by bending a single required length of metal plate. Next, a first embodiment and a second embodiment of a control box according to the present invention will be described with reference to the accompanying drawings. In addition,
The same members as those already described with reference to FIG. 4 are designated by the same reference numerals, and description thereof will be omitted. First, a control box according to a first embodiment will be described with reference to FIGS.
FIG. 1 is a perspective view of a prefabricated refrigerator to which a control box according to the first embodiment is mounted, and FIG. 2 is an enlarged view of a main part showing a mounting state of a mounting plate and a locking plate of the control box. A prefabricated refrigerator-freezer 1 shown in FIG. 1 is constituted by connecting a plurality of heat-insulating panels, and a heat-insulating door 2 is attached to the front of the prefabricated refrigerator-freezer 1 so as to be openable and closable. In addition, a metal control box 3 having operation switches and the like disposed on the front is attached to the left front surface of the heat insulating door 2, and electrically controls the driving of the refrigerating device and the like based on a temperature change in the refrigerator. A control circuit board and the like are built in the control box 3. As shown in FIG. 2, a mounting plate 18 having an inverted hat-shaped cross section is provided inside the control box 3 for mounting the alarm buzzer 12 as an example. The mounting plate 18 is made of metal and has a fixing surface 19 that is welded and fixed to the back surface 7 of the lid 5.
Is spot-welded to the vicinity of the side plate 13 at substantially the center in the vertical direction of the lid 5. From both ends of the fixed surface 19, vertical surfaces 20 are respectively erected over predetermined dimensions toward the main body 4 side of the control box 3, and an alarm buzzer mounting surface 21 for mounting the alarm buzzer 12 is provided at the end. ,
Opposite to the fixing surface 19, it is integrally formed so as to be orthogonal to the vertical surface 20. This alarm buzzer mounting surface 2
The alarm buzzer 12 is fixed to the alarm buzzer mounting surface 21 by commonly inserting a screw 24 into the mounting hole 22 and the mounting hole 23 on the alarm buzzer side. At this time, the convex portion 25 forming the main body of the alarm buzzer 12
Is located in the space between the two alarm buzzer mounting surfaces 21. On the alarm buzzer mounting surface 21 of the mounting plate 18, a locking plate 26 directed toward the main body 4 is integrally bent at an end on the side close to the flange 17. When the lid 5 is closed, the locking plate 26
A locking relationship is set so as to enter the inside of the main body 4, and a locking hole 27 is formed at a position facing the main body side locking hole 15. The cover 5 can lock the main body 4 in a closed state by inserting and fixing a screw in the main body side locking hole 15 and the locking hole 27 in common. Further, a hole 28 is formed in the fixed surface 19 at a position facing the convex portion 25 which is a source of the buzzer sound so that the warning sound from the warning buzzer 12 can be reliably heard. Hole 28 at
A similar hole (not shown) is formed correspondingly at a position facing. In addition, since a label for display indicating the name of a switch or the like is affixed to the front part of the control box 3, the hole is not visually recognized from the outside. As described above, since the locking plate 26 is integrally formed at the end of the alarm buzzer mounting surface 21 on the side plate 13 side of the mounting plate 18, the number of parts can be reduced and work efficiency can be improved. Can be. Since the dimensions of the locking plate 26 itself are the same as those of the related art, the strength of the locking plate 26 is not reduced. In addition, since the mounting plate 18 and the locking plate 26 can be formed only by bending one sheet metal, there is no waste in material removal and less waste material. Moreover, the shape of the sheet metal forming the mounting plate 18 is such that the other part of the sheet metal does not interfere with the pressing of the mold against the sheet metal during processing, so that the dimension h of the mounting plate 18 is reduced. As a result, the thickness of the control box 3 can be reduced, which leads to a reduction in thickness. Furthermore, since the mounting portion of the mounting plate 18 is on the back surface 7 of the lid 5, if a label is attached to the front surface of the control box 3 after being mounted by spot welding, no spot mark will appear on the front surface. No post-processing is required. Next, a control box according to a second embodiment will be described with reference to FIG. FIG. 3 is an enlarged view of a main part showing a mounting state of a mounting plate and a locking plate of a control box according to a second embodiment. As shown in FIG. 3, a mounting plate 29 for mounting the alarm buzzer 12 is provided inside the control box 3. The mounting plate 29 has a fixing surface 30 which is fixed to the back surface 7 of the lid 5 by welding.
0 is spot-welded at the approximate center of the lid 5 in the vertical direction and near the side plate 13. The mounting plate 29 is formed in a U-shape and has a vertical surface 31 erected from the fixing surface 30 and a vertical surface 3.
1 and an alarm buzzer mounting surface 32 formed in parallel with the fixing surface 30. The projection 25 of the alarm buzzer 12 is provided substantially at the center of the vertical surface 31 and the alarm buzzer mounting surface 32.
A notch 33 for inserting and disposing is formed.
A mounting hole 34 is formed in the alarm buzzer mounting surface 32,
Similarly to the first embodiment, the alarm buzzer 12 is fixed to the alarm buzzer mounting surface 32 by commonly inserting the screw 24 into the mounting hole 34 and the mounting hole 23 on the alarm buzzer side. here,
Since there is no bent portion of the sheet metal on the notch 33 side of the alarm buzzer mounting surface 32, even if the mounting hole 34 is arranged to a position just near the end on the notch 33 side, the bending is affected during bending of the sheet metal. The mounting hole 34 is not deformed. On the alarm buzzer mounting surface 32 of the mounting plate 29, a locking plate 35 directed toward the main body 4 is integrally formed at an end on the side close to the flange 17. When the lid 5 is closed, the locking plate 35 is set so as to enter the inside of the main body 4, and a locking hole 36 is formed at a position facing the main body side locking hole 15. I have. The cover 5 can lock the main body 4 in a closed state by inserting and fixing a screw in the main body side locking hole 15 and the locking hole 36 in common. Further, the fixing surface 30 has a first
As in the embodiment, a hole 37 is formed at a position facing the convex portion 25 that is a buzzer sound source, and a similar hole (not shown) also corresponds to a position facing the hole 37 in the lid 5. Is formed. As described above, since the locking plate 35 is integrally formed at the end of the alarm buzzer mounting surface 32 on the side plate 13 side of the mounting plate 29, the number of parts can be reduced and work efficiency can be improved. Can be. Since the dimensions of the locking plate 35 itself are the same as those of the related art, the strength of the locking plate 35 is not reduced. In addition, since the notch 33 for inserting and arranging the convex portion 25 of the alarm buzzer 12 is formed in the center of the alarm buzzer mounting surface 32, the mounting hole 34 is notched.
At the very end of the side, so that the mounting hole 34
Can be reduced to the end of the alarm buzzer mounting surface 32 on the side of the notch 33, and only by changing the position of the mounting hole 34, the distance from the projection 25 to the alarm buzzer side mounting hole 23 is different. It can respond to the installation of an alarm buzzer. If the notch 33 is not provided on the vertical surface 31 but is provided only on the alarm buzzer mounting surface 32, when the convex portion 25 is inserted into the notch 33, the convex portion 25
By contacting the alarm buzzer 1, positioning can be performed when the alarm buzzer 12 is attached. Also, since the mounting portion of the mounting plate 29 is on the back surface 7 of the lid 5, if a label is attached to the front portion of the control box 3 after being mounted by spot welding, no spot mark will appear on the surface, so that the surface treatment No post-processing is required. It should be noted that the present invention is not limited to the first and second embodiments described above, and it is needless to say that various improvements and modifications can be made without departing from the gist of the present invention. is there. For example, although an alarm buzzer is used as an electric component to be attached to the mounting plate, another electric component such as a display lamp may be used. Further, although the mounting plate is attached to the lid, it may be attached to the main body. Further, although the control box body and the mounting plate are made of metal, a metal mounting plate may be attached to the resin body by screwing. As described above, according to the control box of the present invention, it is possible to reduce the number of parts and the number of work steps, and to provide a control box with low manufacturing cost. it can. Moreover, the strength of the locking member is not reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a prefabricated refrigerator-freezer to which a control box according to an embodiment of the present invention is attached. FIG. 2 is an enlarged view of a main part showing a mounting state of a mounting plate and a locking plate of the control box according to the first embodiment. FIG. 3 is an enlarged view of a main part showing a mounting state of a mounting plate and a locking plate of a control box according to a second embodiment. FIG. 4 is a schematic perspective view showing a state in which a lid of a conventional control box is opened as an example. [Description of Signs] 1 Prefabricated refrigerator-freezer 3 Control box 4 Main body 5 Lid 6 Bottom surface 7 Back surface 11, 18, 29 Mounting plate 12 Alarm buzzers 14, 26, 35 Locking plates 21, 32 Alarm buzzer mounting surface

Claims (1)

1. A substantially box-shaped main body having an opening on a front surface thereof.
A cover for opening and closing the opening, a mounting member for mounting a required electric component to at least one of the inside of the main body or the inside of the cover, and a cover that is always closed with respect to the main body. A control box comprising a retaining member to be held, wherein the mounting member and the retaining member are integrally formed by bending a single required length of metal plate.