JPH0589916U - Plate mounting structure - Google Patents

Abstract

(57) [Summary] [Purpose] To allow one person to safely perform work when removing a plate that is heavier than the side of the chassis. [Structure] This plate material mounting structure is a plate material 4 in which a frame 3 having a screw hole 2 is provided with a daruma hole 9 corresponding to the screw hole 2.
And a plate member mounting structure in which the plate member 4 and the frame 3 are fixed by screwing in a screw 5 having an effective thread portion L longer than the thickness in which the plate member 4 and the frame 3 are overlapped. The effective screw portion L is provided with a locking portion 8 at a portion which penetrates the frame 3 and is exposed on the back surface, and a loose fitting portion 7 having a small diameter except for the locking portion 8.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a plate attachment structure for attaching a plate such as an electromagnetic wave shield plate to a large computer or the like.

[0002]

[Prior Art]

 For example, when mounting or removing a heavy plate on the side of a chassis such as a large computer, a minimum of two workers, a person who supports the plate and a person who handles the screws, are required. It is rare.

In the conventional plate material mounting structure, as shown in FIG. 6, when a heavy plate material 62 is attached to the housing 61, the screw holes 64 provided in the frame 63 on the side surface of the housing and the screw insertion of the corresponding plate material 62 are inserted. The holes 65 are aligned with each other, and screws 66 are first screwed into the upper two screw holes 64 and temporarily fixed, and then the remaining places are fixed with other screws 66. When removing the plate material 62, loosen the screws 66, and when all the screws 66 are loosened to a certain extent, one person supports the plate material 62 and another person loosens it further to remove the screws 66, and all the screws 66 are removed. When it comes off, the plate member 62 is removed from the housing 61.

By the way, in the above-mentioned plate material mounting structure, two workers such as a person who supports the plate material 62 and a person who handles the screw 66 are required, which is not good in workability.

Therefore, as shown in FIG. 7, when the plate member 62 is attached to the housing 61, a plate member supporting screw 67 is previously screwed into the frame 63, and the plate member 62 is screwed with the screw 67 corresponding to this position. By providing a duller hole 68 having a diameter larger than that of the head, the work can be performed by one person.

However, when the plate member 62 is removed, the operator determines whether the screw 67 is loosened by visual inspection or intuition, and if the plate member supporting screw 67 is accidentally removed, the heavy plate member 62 falls off. There is a risk. For this reason, it is necessary to perform the work at this time carefully, and it is not possible to perform efficient work using automatic equipment such as an electric screwdriver.

After the screws 67 for supporting the plate material are screwed into the frame 63, if a process such as inserting an E-ring (E-shaped washer) or a pin into the screw is performed on the back side of the frame 63, for example. Although the screw 67 does not come off, it is a work that requires putting hands inside the housing 61, so it is difficult unless there is a work space inside the housing 61.

[0008]

[Problems to be solved by the device]

 As described above, in the above-described conventional plate member mounting structure, there is a problem in that efficiency is reduced and there is a risk in performing the work performed by two people alone.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a plate material mounting structure capable of safely assembling and removing plate materials by one person.

[0010]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the plate material mounting structure of the present invention applies a plate material having a screw insertion hole corresponding to the screw hole to a frame having a screw hole, and superimposes the plate material and the frame. In a plate member mounting structure in which a plate member and the frame are fixed by screwing in a screw having a screw part longer than the thickness, the screw part of the screw penetrates the frame and is exposed on the back surface. A small-diameter non-threaded portion is provided, leaving the tip end portion, and a concave portion that engages with the non-threaded portion is formed above the screw insertion hole of the plate material.

[0011]

[Action]

 According to the present invention, when fixing the plate material to the frame, first, the screwing into the frame is stopped while leaving the thickness of the plate material, and the plate material is hooked through the screw insertion hole of the plate material, and then the screw is further tightened. If you screw it in, you can fix the plate by yourself.

When removing the plate material from the frame, loosen the screw so that the screw will idle at the non-threaded portion. Moreover, since the tip of the screw remains, the screw cannot be removed beyond this point. Therefore, the plate material can be safely removed.

As a result, one person can safely perform the assembling work and the removing work.

[0014]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing the structure of a plate material mounting structure according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes an electronic device, such as a housing for a large computer. Electronic elements (not shown) are mounted on the housing 1 at high density. An opening is provided on the side surface of the housing 1. A frame 3 having a plurality of, for example, six screw holes 2 is provided on the peripheral portion of this opening. A plate member 4 is applied to the frame 3 and fixed by screws 5.

As shown in FIG. 2, the screw 5 is provided with an effective screw portion L that is longer than the thickness in which the plate member 4 and the frame 3 are overlapped with each other. The effective screw portion L includes a fixing portion 6, a loose fitting portion 7 and a locking portion 8. The screw 5 is screwed into the frame 3 through the plate member 4 and is fixed in the state of penetrating the frame 3 and exposed on the back surface. The parts to be engaged are the loose fitting part 7 and the locking part 8. Of these, the loose fitting portion 7 refers to a non-threaded portion formed to have a small diameter except for the engaging portion 8 at the tip portion.

On the other hand, the plate member 4 is an electromagnetic wave shield plate, such as an iron plate, for shielding the electromagnetic wave generated inside when the large computer operates, and is very heavy. The plate member 4 has a duller hole 9 as a screw insertion hole corresponding to the screw hole 2 of the frame 3. The duller hole 9 has a large diameter hole through which the head of the screw 5 can pass, and a small-diameter concave portion with which the loosely fitting portion 7 of the screw 5 engages is formed.

Next, a work procedure in this plate material mounting structure will be described with reference to FIGS.

First, a case of assembling a large computer will be described.

When attaching a plate member to the housing of a large computer, first, as shown in FIG. 3, all six screws are screwed into the frame 3 of the housing 1 up to the fixing portion 6 of the screw 5. At this time, the screw 5 is stopped at a position where the gap t between the frame 3 and the head of the screw 5 is wider than the thickness of the plate member 4. Then, the head hole of each screw 5 is inserted into the duller hole 9 of the plate member 4, and the plate member 4 is lowered in the direction indicated by the arrow A, and the plate member 4 is hung on the fixing portion 6 of the screw 5.

Finally, as shown in FIG. 4, the plate 5 is fixed by screwing the screw 5 until the head of the screw 5 and the frame 3 sandwich the plate 4. The series of operations at this time can be performed by one person.

Next, the case of removing the plate member 4 at the time of maintenance and inspection of a large computer will be described.

In this case, first, as shown in FIG. 5, as each screw 5 is loosened, the fixing portion 6 of the screw 5 is disengaged from the frame 3 so that the loose fitting portion 7 is idle. In this state, the plate member 4 is supported by the loose fitting portion 7. Further, the locking portion 8 stops the screw 5 from being pulled out by the weight of the plate material 4.

That is, it is possible to safely perform a series of operations by loosening the screws 5 and supporting the plate member 4 so that the plate member 4 does not fall off so that the plate member 4 can be removed.

After that, the plate member 4 supported by the screw 5 may be lifted and removed from the head of the screw 5 through the blunt hole 9.

When it is necessary to remove the screw 5, by pressing the screw 5 from the engaging portion 8 side of the screw 5 or pulling the head of the screw 5 and turning the screw 5 in a direction of loosening the screw 5, The screw 5 can be removed.

As described above, according to the plate material mounting structure of this embodiment, it is possible for one person to safely perform the work of attaching the heavy plate material 4 to the side surface of the housing and the work of removing the plate material 4 heavier than the side surface of the housing. Also, when the screws 5 are loosened and the fixing parts 6 are removed during the work of removing the plate member 4, it causes idle rotation, so the screws can be securely loosened to a predetermined position without relying on the operator's eyes or intuition. This work can be efficiently performed by using an automatic device, such as an electric screwdriver, and the workability is improved. Further, as compared with the conventional case, the plate material supporting screw 67 when mounting the plate material 62 is not required, so that the working time at this time can be shortened, and the cost of not using the screw 67 can be reduced.

[0029]

[Effect of the device]

 As described above, according to the plate material mounting structure of the present invention, the plate member can be securely prevented from falling off by providing the screw-free portion while leaving the tip end of the screw. The removal work can be done and the workability can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a plate material mounting structure according to an embodiment of the present invention.

FIG. 2 is a side view showing a screw used in the plate material mounting structure of FIG.

FIG. 3 is a cross-sectional view showing a procedure for incorporating a plate material into a housing.

FIG. 4 is a cross-sectional view showing a procedure for incorporating a plate material into a housing.

FIG. 5 is a cross-sectional view showing a procedure for removing the plate material from the housing.

FIG. 6 is a perspective view showing a conventional plate material mounting structure.

FIG. 7 is a perspective view showing an improved example of a conventional plate material mounting structure.

[Explanation of symbols]

1 ... Housing, 2 ... Screw hole, 3 ... Frame, 4 ... Plate material, 5 ...
Screws, 6 ... Fixing part, 7 ... Free fitting part, 8 ... Locking part, 9 ... Daruma hole.

Claims (1)

[Scope of utility model registration request] 1. A plate member having a screw insertion hole corresponding to the screw hole is applied to a frame which is located on a side surface of the housing and has a screw hole, and an effective screw portion which is longer than a thickness in which the plate member and the frame are overlapped with each other. In a plate material mounting structure in which the plate member and the frame are fixed by screwing in a screw having a 2. A plate material mounting structure, wherein a non-screw part is provided, and a recess for engaging the non-screw part is formed in an upper portion of the screw insertion hole of the plate material.