JPH0523655U - Cover mounting structure to the frame opening - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a mounting structure which can perform the work of mounting and removing the cover without removing the fixing screw and has a desired positioning accuracy. [Structure] One side wall 1 connected to an opening of an internal frame 11
A fixing screw 28 and a convex portion 18 are provided on the la 1a. A first flange portion 13 is provided on the other wall portion connected to the opening,
The locking projection 16 is formed on the first flange portion. A third flange portion 20 facing the one side wall is provided at one side edge of the side cover 12, and a notch portion 21 is provided in the third flange portion.
And a recess 22 is provided. A metal fitting 24 having a substantially L-shaped cross section is projectingly arranged at a predetermined position on the inner surface side of the side cover, and a locking hole 25 is provided at a predetermined position of the auxiliary metal fitting. Prior to fixing the side cover to the frame, the locking projection and the locking hole are locked, and the projection and the recess are aligned with each other to temporarily fix them in a predetermined positional relationship and tighten the fixing screw. , Both are fastened via the notch.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure for attaching a cover to a frame opening, and more specifically, to an improvement in a structure for attaching an inner frame and a side cover used as an inner frame of a main unit in a button telephone device.

[0002]

[Prior Art]

 With the spread of telephones, a button telephone device has been developed and provided for sharing a small number of telephone lines among multiple telephones so that the telephone lines can be used efficiently and extension calls can be made between telephones. This button telephone system consists of one main unit, a plurality of key telephone sets, and a wiring cable that connects them, and the main unit is a board-shaped central line circuit and extension line that are respectively formed in the hollow case body. Circuits, power supply circuits, etc. are provided. An example of a conventional main device is shown in FIG. The figure shows a state in which an exterior panel such as a decorative plate has been removed. The upper and lower middle frames 1 are an internal frame 2 having a substantially U-shaped cross section that constitutes three side walls, and an opening of the internal frame 2. The side cover 3 is fixed to the inner frame 2 with four screws 4. A board 5 on which various circuits are formed is arranged in the middle frame 1. Reference numeral 6 is a wiring cable connected to the circuit of the board 5.

[0003]

[Problems to be solved by the device]

 At the time of initial data registration during installation and maintenance after installation, the side cover 3 is removed from the inner frame 2 and opened, and then various operations are performed. For this purpose, all screws 4 must be completely removed. In addition, the side cover 3 must be fixed with one hand or the like so that the side cover 3 does not shift until the screw 4 is removed, which complicates the work. The same thing occurs when the side cover 3 is attached after the maintenance work is completed. The present invention has been made in view of the above problems, and an object thereof is to provide a structure for mounting a cover on a frame opening, which facilitates the work of mounting and removing the cover.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problem, in the cover mounting structure for the frame opening of the present invention, at least one wall is connected to the opening of the frame and one wall is connected with a fixing screw, and A protrusion or a recess for alignment is provided, and a locking projection projecting toward the opening is connected to the other wall connected to the opening, and the cover is a flange facing one side wall. A flange, a notch facing the fixing screw, and a recess or protrusion matching the protrusion or recess, with the protrusion facing inward at a predetermined position on the inner surface of the cover. In addition to the projecting arrangement, a locking hole is provided at a fixed position of the projection so that the locking hole and the locking projection can be locked.

[0005]

[Action]

 To attach the cover detached from the frame, attach the fixing screw loosely to the frame so that a predetermined space is created between the flange part of the cover and one wall part of the frame. ， Attach the cover to the opening surface of the frame. At this time, the shaft part of the fixing screw is inserted and arranged in the notch provided in the flange part of the cover, and the locking projection provided on the frame faces the locking hole provided in the cover. Then, the cover is moved in a predetermined direction so that the flange portion of the cover and one wall portion of the frame come into contact with each other. By this movement, the locking projections provided on the frame enter into the locking holes provided on the projections of the cover, and the cover is prevented from coming off the frame. Further, when the flange portion of the cover is in contact with one wall portion of the frame, the convex portion or concave portion provided on the one wall portion enters the concave portion or convex portion provided on the flange portion, and the position of the cover is restricted. ， The cover is temporarily fixed to the frame. In this state, the cover is fastened to the frame by tightening the fixing screws.

[0006]

【Example】

 Hereinafter, a preferred embodiment of a cover mounting structure for a frame opening according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing a state in which an exterior panel of a main device in a button telephone device, which is one application example of the present invention, is removed. As shown in the figure, an inner frame 10 in which a board on which various circuits are formed is installed, and an inner frame 11 that constitutes three side walls, and one side wall opening is attached to one side wall opening of the inner frame 11. It is composed of the side cover 12 that constitutes it.

The inner frame 11 has both free end edges on the opening side bent inward at about 90 degrees to form first and second flange portions 13 and 14, respectively. The side cover 12 is received by the lunge portions 13 and 14. Further, the relatively wide first flange portion 13 is provided with substantially U-shaped cutout windows 15 and 15 at the upper and lower positions thereof, respectively, and the first flange portion 13 is free in the cutout windows 15 and 15. The locking projections 16 and 16 projecting toward the end side are defined. Screw holes 17 and 17 are formed above and below one side wall 11a of the internal frame 11 that is continuous with the second flange portion 14, and the small cylindrical projections are formed close to the screw holes 17 and 17, respectively. 18, 18 are formed.

The side cover 12 has a flat plate portion 19 forming one side wall and one side edge of the flat plate portion 19, that is, the second flange portion 14 side of the inner frame 11 and is bent by 90 degrees. The third flange portion 20 is integrally formed, and when the side cover 12 is attached to the inner frame 11, the third flange portion 20 of the side cover 12 comes into contact with one side wall 11a of the inner frame 11. ing. Then, at a predetermined position on the free end side of the third flange portion 20, substantially U-shaped notches 21 and 21 facing the screw holes 17 provided in the inner frame 11 are formed, and the notches 21 are formed. , 21 are formed with concave portions 22, 22 corresponding to the convex portions 18, 18 provided on the inner frame 11. On the other hand, on the inner side surface of the side cover 12 on the side opposite to the third flange portion 20, there are formed L-shaped metal fittings 24, 24 having a flat cross section, which are inwardly projected by the contact bending process. There is. The flat cross-section substantially L-shaped metal fittings 24, 24 can be inserted into the notched windows 15, 15 provided in the first flange portion 13 of the inner frame 11, and the flat cross-section substantially L-shaped metal fittings 24, 24 can be bent. Locking holes 25, 25 that can be locked with the locking piece projecting piece 16 provided on the first flange portion 13 are formed near the portion.

The inner frame 11 and the side cover 12 are finally fixed to each other through the fixing screws 28 attached to the screw holes 17 provided in the one side wall 11 a of the inner frame 11 to the third side cover 12. It is performed by tightening and fixing the notch 21 provided on the flange portion 20. Although not shown, a board on which various circuits are formed is housed inside the middle frame 10 composed of the inner frame 11 and the side cover 12, and the top and bottom plates are provided in the upper and lower openings thereof. Is attached and closed, and a front cover is attached to at least the surface of one side wall 11a of the inner frame 11 so that the fixing screw 28 is not exposed to the outside in a use state. Further, various switches are exposed on one side wall 11a of the inner frame 11, that is, on the side of the front cover, so that when the main device is installed, a predetermined space is provided on the front face of the front cover for operating the switches. Secured.

As shown in FIG. 1, in order to attach the side cover 12 when the side cover 12 is separated from the inner frame 11, the fixing screw 28 is loosely attached to the screw hole 17 of the inner frame 11. In advance, the side cover 12 is advanced toward the side opening surface of the inner frame 11, and the metal fittings 24, 24 of the side cover 12 having a flat cross section are provided with the cutout windows 15 of the first flange portion 13 of the inner frame 12. Insert into 15. At this time, the inner surface of the side cover 12 abuts on the first and second flange portions 13 and 14 of the inner frame 11, but the third flange portion 20 of the side cover 12 and the side wall 11a of the inner frame 11. A predetermined space is created between them. Further, the shaft portion 28a of the fixing screw 28 is inserted and arranged in the notch portion 21 provided in the third flange portion 20 of the side cover 12.

Next, the side cover 12 is moved in a predetermined direction so that the third flange portion 20 of the side cover 12 and the one side wall 11a of the inner frame 11 come into contact with each other. By this movement, the locking projections 16 and 16 provided on the inner frame 11 enter into the locking holes 25 and 25 provided on the metal fitting 24 having the substantially L-shaped cross section of the side cover 12, and the side cover 12 is secured. The detachment from the inner frame 11 is prevented. Further, when the third flange portion 20 of the side cover 12 is in contact with the one side wall 11a of the inner frame 11, the convex portion provided on the one side wall 11a is included in the concave portions 22, 22 provided on the third flange portion 20. 18, 18 enter and the position of the side cover 12 in the vertical direction is regulated, and the side cover 12 is temporarily fixed to the inner frame 11. In this state, the side cover 12 is fastened to the inner frame 11 by tightening the fixing screw 28. It should be noted that when removing the side cover 12, it is possible to easily perform the work by reversing the above procedure without completely removing the fixing screw 28. In addition, in the above embodiment, the convex portion 18 is provided on the side of the inner frame 11 and the concave portion 22 is provided on the side of the side cover 12, but the present invention is not limited to this, and the reverse arrangement is also possible. Needless to say, they may be mixedly arranged, and in some cases they may not be arranged. The position of the opening of the frame may be any position in the front-back, left-right, and up-down directions, and is arbitrary.

[0012]

[Effect of the device]

 As described above, in the cover mounting structure for the frame opening according to the present invention, the fixing screw provided on the frame and the notch provided on the flange part of the cover are fastened together. Workability is improved because it can be done without completely removing the fixing screws. To fix the cover to the cover, the cover is set at the fixed position of the frame opening by the engagement of the locking projection and the locking hole, and the matching of the recess and the protrusion on the wall of the frame and the flange of the cover. It can be temporarily fixed while positioning. Therefore, the problem of deterioration of positioning accuracy caused by the fastening performed through the notch as described above is also solved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a preferred embodiment of a structure for attaching a cover to a frame opening according to the present invention.

FIG. 2 is an exploded perspective view showing a conventional example.

[Explanation of symbols]

 11 ... Internal frame 12 ... Side cover 16 ... Locking projection piece 17 ... Screw hole 18 ... Convex portion 20 ... Third flange portion (flange portion) 21 ... Notch portion 22 ... Concave portion 24 ... Planar cross-section L-shaped metal fitting (projection) Container) 25 ... Locking hole

Claims (1)

[Scope of utility model registration request] 1. A structure in which a frame having at least one wall surface opened and a substantially flat plate-shaped cover attached to the opening are attached, and one wall portion connected to the opening of the frame is fixed. While mounting a screw, a convex portion or a concave portion for positioning is provided, and a locking projection projecting toward the opening is connected to the other wall portion connected to the opening, and the cover is A flange portion facing one of the side walls, a notch portion facing the fixing screw, and a concave portion or a convex portion conforming to the convex portion or the concave portion are provided on the flange portion, and a predetermined inner surface of the cover is provided. The protrusion is arranged so as to inwardly project at a position, a locking hole is provided at a predetermined position of the protrusion, and the locking hole and the frame projection are locked to the locking projection. Cover mounting structure.