JPH0544849U - Cover attaching / detaching device - Google Patents

Abstract

(57) [Summary] [Purpose] The cover can be attached and removed without removing the screws. [Structure] A U-shaped notch 8 having an upper opening at the top is formed at a rim 3 of an opening 2 formed in a frame, and a screw 7a is screwed into a screw hole 4 provided at a lower part. A screw 7b is passed through a screw through hole 6 provided corresponding to the cutout portion 8 and a square nut 9 is screwed in, and a cutout portion 10 having a downward opening corresponding to the screw 7a is provided at a lower portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cover attaching / detaching device that prevents a screw from falling off when the cover is attached / detached in a structure in which a cover is attached to an opening of a frame for housing a device inside with a screw.

[0002]

[Prior Art]

 Normally, in the frame that houses the equipment, an opening is provided for assembly and removal of the equipment, inspection of the equipment, etc., and a cover is detachably attached to this opening with a screw. Many. FIG. 2 shows an example of such a configuration. An opening 2 is formed in the front side of the frame 1 in a frame 1 for accommodating a device (not shown) inside, and the edges 3 on both the left and right sides of the opening 2 are formed. , 3 are provided with two screw holes 4 respectively, the cover 5 is provided with screw through holes 6 at four positions corresponding to the screw holes 4, and the cover 5 is attached to the frame 1 at four positions through screws 7. It is installed.

[0003]

[Problems to be solved by the device]

 However, in the above-described configuration, the screw 7 must be completely removed when the cover 5 is removed, and at this time, the screw 7 often falls off at this time. The drawback was that we had to find it. An object of the present invention is to eliminate the above-mentioned drawbacks, and it is an object of the present invention to provide a cover attaching / detaching device that does not require screw removal.

[0004]

[Means for Solving the Problems]

 The present invention provides a cover attaching / detaching device for attaching / detaching a cover to / from a frame having an opening. A first notch is provided along an up-down direction at an edge of the opening and has an upper opening, and a screwed first screw. A second screw penetrating the cover corresponding to the notch, a nut screwed into the second screw, and a second screw provided on the cover corresponding to the first screw and having an opening at the bottom. It is composed of a notch.

[0005]

[Action]

 When mounting the cover, move it downward from a position slightly higher than the specified mounting position, and when moving, move the second screw attached to the cover so that the square nut is on the back side of the edge of the opening. In this way, the first cutout portion provided in the frame is inserted from above, and the second cutout portion provided in the cover is inserted into the first screw attached to the frame from above. After that, the first screw and the second screw are tightened to fix the cover. When removing the cover, loosen the first screw and the second screw, move them slightly upward, and then remove them.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention. In the same figure, U-shaped notches 8 having an opening at the top are provided at the respective edges 3, 3 on both the left and right sides of the opening 2 of the frame 1, a screw hole 4 is provided at the bottom, and a screw 7a is screwed in . In addition, the cover 5 is provided with screw through holes 6 at the upper portions on the left and right sides corresponding to the cutout portions 8 of the frame 1, and the screw 7b is passed through the screw through holes 6 and the square nut 9 is screwed in. Inverted U-shaped notches 10 are formed at the lower portions of both sides corresponding to the screws 7a of the frame 1 and open downward.

Next, the operation of the embodiment configured as described above will be described. First, when the cover 5 is attached to the frame 1, the square nut 9 is set apart from the screw head and the screw 7a is loosened in advance, and then the cover 5 is attached to the predetermined attachment position. From a slightly higher position, contact the edges 3 and 3, and then move downward to a predetermined mounting position. At this time, the screw 7b of the cover 5 is inserted into the notch 8 of the frame 1 from above, The notch 10 of the cover 5 is inserted into the screw 7a of the frame 1 from above, and the square nut 9 of the lock screw 7b is located on the back side of the edge 3 of the frame 1. After that, by screwing in the screws 7a and 7b, the upper portion of the cover 5 is tightened to the edge 3 by the square nut 9, and the lower portion of the cover 5 is tightened to the edge 3 by the screw 7a, and the cover 5 is fixed to the frame 1. . Next, when removing the cover 5, the screws 7a and 7b are appropriately loosened without being removed, and then the cover 5 is moved slightly upward so that the screw 7b is disengaged from the notch 8 and the notch 10 is disengaged from the screw 7a. The cover 5 can be removed from the frame 1 by pulling it toward the front side when the cover is opened. The screw 7b after removal is attached to the cover 5 together with the square nut 9, and the screw 7a is screwed into the edge 3 of the frame 1, so that the screws 7a and 7b can be prevented from falling off.

In the above description, the square nut 9 is screwed into the screw 7b. However, other square nuts having a square shape or more, or a detent nut having a shape that comes into contact with the inner surface of the frame 1 and is prevented from rotating. Good. Further, although the screw hole 4 is provided in the lower portion of the edge 3 of the frame 1, a screw through hole may be provided instead of the screw hole 4 and a nut may be welded to the rear surface side.

[0009]

[Effect of the device]

 As described above, according to the present invention, a U-shaped notch having an upper opening is provided at the edge of the opening of the frame, a screw is screwed into the lower portion, and a screw is attached to the upper portion of the cover. Since the nut is screwed in and penetrated through, and a notch with a downward opening is provided at the bottom, the screw does not fall off when attaching or detaching the cover even though it has a simple structure.Assembly and removal of equipment, inspection of equipment, etc. It is possible to provide a cover attaching / detaching device that facilitates the above work.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a configuration of a conventional cover attaching / detaching device.

[Explanation of symbols]

1 ... Frame, 2 ... Opening, 3 ... Edge, 4 ... Screw hole, 5 ...
Cover, 6 ... screw through hole, 7a, 7b ... screw, 8, 10 ...
Notch, 9 ... Square nut.

Claims (1)

[Scope of utility model registration request] 1. A cover attachment / detachment device for attaching / detaching a cover to a frame having an opening, wherein a first notch portion provided along an up-down direction at an edge of the opening and having an upper opening, and a first screwed-in portion. A screw, a second screw penetrating the cover corresponding to the cutout portion, a nut screwed into the second screw, and a lower opening provided in the cover corresponding to the first screw. A cover attaching / detaching device comprising a second notch portion.