JP3503922B2 - Windows for electrical equipment storage boxes - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved structure of a window for an electric equipment storage box which allows the meters inside the electric equipment storage box such as a switchboard to be seen from the outside.

[0002]

2. Description of the Related Art Conventionally, a frame member 14 incorporating a transparent plate material such as a window glass plate is used as a face plate material 11 such as a door surface or a lid surface of an electrical equipment storage box for storing a switchboard or instruments.
In the case of attaching to the window opening 12 of No. 2, as shown in FIG. 3, it is common to insert an appropriate number of insert bolts 15 provided in advance on the back surface of the frame member 14 through the attachment bolt holes 16 and fix them with nuts. is there. FIG. 4 is a cross-sectional view including a peripheral portion of the mounting bolt 15 of the electric equipment storage box window,
The frame member 14 includes an insert bolt 1 having a head embedded therein.
5 through the packing 3 and the bolt hole 16, and the face plate material 11
It is fixed by tightening with a nut 17 to the peripheral edge portion 13 of the window opening. Further, the window glass plate 2 is framed by the frame member 14 while being fitted in the recess of the packing 3.

Such a window for an electric equipment storage box is sandwiched by the frame member 14 and the peripheral edge portion 13 of the window opening over the entire circumference of the window glass 2, so that the window glass 2 is not damaged by an impact. The packing 3 having a substantially U-shaped cross section is required to cover the peripheral portion of the glass 2, and the packing shape is complicated. Further, in the assembling work, it is necessary to fit the entire peripheral portion of the window glass 2 to the substantially U-shaped portion of the packing 3 and then attach the same, which is a poor workability.

Further, since the packing 3 is made of a soft elastic material such as synthetic rubber, it is poor in rigidity and the frame member 1
It was easy to separate from No. 4, and it was necessary to perform work while holding it by hand so as not to separate it, or to bond the frame member 14 and the packing 3 with an adhesive so as not to separate. For this reason, there is a problem that the man-hours required for preparation are required for adhesion and workability is not good.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and uses a packing having a simple shape and good moldability, and also has good impact resistance,
Also, to provide a window for an electric equipment storage box which is excellent in assembling.

[0006]

SUMMARY OF THE INVENTION The above problem is caused by a window for an electric equipment storage box in which a window glass plate is attached to a peripheral edge of a window opening provided in a face plate material of the electric equipment storage box via a frame member. There are several windowpanes on the back side of the frame member.
The embedded nut is placed so that it is located between the plate end and the plate surface material end.
A mounting plate that is provided and can be passed from the outer periphery to the inner periphery of the frame member is screwed into the embedded nut.
It is attached by a bolt attached, and the face plate material is sandwiched between the attachment plate material and the outer periphery, and the window glass plate is sandwiched between the inner periphery and the attachment plate material, and the outside of the frame member is sandwiched. Fluctuating packing is provided on the contact surface between the face plate material and the window glass plate on the periphery and the inner periphery , and
On the back side of the frame member between the lock nuts, the window glass plate and the plate
A window is formed by forming a pair of groove walls protruding along the edge of the face material.
Protects the edge of the glass plate and embeds mounting bolts
When screwed in the nut,
Therefore, the tightening depth of the mounting plate is regulated and the face plate and the window are
This can be solved by a window for an electrical equipment storage box, characterized in that an appropriate pressing force is applied to both the glass plate and the glass plate .

Further, in the window for an electric equipment storage box of the present invention, the frame member is made of synthetic resin, and two-color molding is performed on the contact surfaces of the face plate material and the window glass plate on the outer periphery and the inner periphery thereof. Thus, it can be embodied in a form in which packing formed in a convex shape is arranged. Furthermore, at least the tip portion of the packing is a flexible hollow shape, sponge shape, jagged shape,
Alternatively, it can be suitably embodied in the form of being tapered.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a description will be given with reference to FIGS. 1 and 2 showing an embodiment of a window for an electric equipment storage box of the present invention. In the present invention, the basic structure in which the window glass plate 2 is attached to the peripheral edge portion 13 of the window opening 12 provided in the face plate material 11 of the electric device storage box via the frame member 4 is not different from the conventional structure, A feature of the invention is that a plurality of mounting plate members 5 having a length that can be extended from an outer peripheral edge 41 on the outer peripheral side to an inner peripheral edge 42 on the inner peripheral side are embedded in a plurality of positions on the back surface side of the frame member 4. It is attached by a mounting bolt 6 screwed into a lock nut 61, and the peripheral portion 13 of the face plate material 11 is sandwiched between the outer peripheral side 51 of the mounting plate material 5 and the outer peripheral portion 41, and the inner peripheral portion 42. And the inner peripheral side 52 of the mounting plate member 5, the window glass plate 2 is sandwiched, and the contact surfaces of the face plate member 11 and the window glass plate 2 of the outer periphery 41 and the inner periphery 42 of the frame member. The packings 41a and 42a that can be fluctuated There is to have only been.

This fluctuating packing is such that at least the tips of these packings 41a, 42a are formed in a flexible hollow shape, sponge shape, jagged shape or tapered shape, and the face plate material 11 and the window glass are used. It is configured to flexibly contact the plate 2.

Further, in the present invention, the frame member 4 is an AE.
It is assumed that synthetic resin such as S resin is injection-molded, and the outer periphery 41 and the inner periphery 42 thereof are packed with packing 41 for maintaining hermeticity with the face plate material 11 or the window glass plate 2.
Another feature is that a and 42a are formed and arranged in a convex shape by two-color molding.

Here, the two-color molding is, for example, a method of molding two kinds of synthetic resins having different materials in a state of being in contact with each other and integrating them in the injection molding of a synthetic resin. Then, for example, the packings 41a and 42a of the elastomer resin can be integrally formed on the main body of the frame member 4 of the AES resin.

Such a rigid frame member 4 and packing 41
In order to assemble a window for an electric device storage box using a and 42a, first, the frame member 4 is temporarily assembled on the window glass plate 2. Then, this is fitted into the window opening 12 provided in the face plate material 11 of the electric device storage box, and the peripheral edge portion 13 and the outer periphery 41 of the frame member 4 are aligned with each other. Then, the mounting bolt 6 may be screwed into the embedded nut 61 to fix the mounting plate member 5. Thus, the peripheral edge portion 13 of the face plate material 11 is sandwiched between the outer peripheral side 51 of the mounting plate material 5 and the outer periphery 41 via the fluctuating packing 41a, and the inner periphery 42 and the mounting plate material 5 are sandwiched. The window glass plate 2 can be held between the inner peripheral side 52 and the fluctuating packing 42a.

As described above, according to the present invention, the window glass plate 2 and the face plate member 11 are partially sandwiched by the mounting plate members 5 mounted at a plurality of positions on the back surface side of the frame member 4, and the frame member 4 is used.
By providing the fluctuating packing 3 on the contact surfaces of the face plate material 11 and the window glass plate 2 on the outer periphery and the inner periphery of the
Since the window glass plate 2 can slightly move against vibration or shaking when the window glass plate 2 is subjected to a mechanical shock, and an unreasonable force is not applied to the window glass plate 2, the shock resistance is good. Also, workability is greatly improved. In addition, sufficient sealing performance is maintained while eliminating the need for a packing having a complicated shape as in the past.

Further, in the present invention, the mounting bolt 6 is the same as that shown in FIG.
As shown in FIG. 5, since the mounting plate member 5 is restricted by the insertion port upper end portion 62 of the mounting bolt 6 when tightened, an appropriate pressing force is applied to both the face plate member 11 and the window glass plate 2.
Is configured as follows . Therefore, if the closing depth is set, the face plate material 11 and the window glass plate 2 are always attached with the same pressing force without variation due to the difference in pressing at each place or the individual difference of the operator. It becomes possible to obtain stable hermeticity.

It should be noted that the face plate member 11 is provided at both ends of the mounting plate member 5.
And the window glass plate 2 can be attached at the same time,
The attachment work at one location can be completed with one attachment bolt 6, and the work of drilling a bolt hole for attachment as in the conventional case is not required, so the workability at the time of attachment is also good.

The mounting plate member 5 of the present invention may have an elliptical shape, an oval shape, or an oblong shape in plan view in addition to a circular washer having a required outer diameter, and a cross-sectional shape in addition to a flat plate shape or a tip portion. The shape may be such that it is bent to give an elastic force like a spring. Further, it is preferable to use a metal for the spring because the impact resistance can be improved.

Further, as described above, the packings 41a, 4
Since 2a is integrally molded by two-color molding, the conventional bonding work at the time of assembly is completely unnecessary, the working time can be shortened, and the workability is improved.

In the present invention, the plurality of embedded nuts 61 for fixing the mounting bolts 6 for fixing the mounting plate member 5 to each other are provided at the portion sandwiched between the outer periphery 41 and the inner periphery 42 of the frame member 4. The portions of the frame member between the embedding nuts 61, which are pre-embedded at predetermined intervals, have a pair of inverted U-shaped groove walls 43, 44 as shown in the sectional view of FIG. Can be formed in advance.

Since the pair of groove walls 43 and 44 can be adjusted in thickness to have appropriate flexibility, the collision with the end portion of the window glass 2 can be alleviated and the impact can be absorbed. Therefore, the edge part of the window glass plate 2 can be protected suitably. Further, it is preferable that the peripheral edge portion 13 of the face plate member 11 and the window glass plate 2 be formed in advance with respect to the pair of groove walls 43 and 44 in a preliminary size having an appropriate clear run. Especially, the window glass plate 2 needs a clearance for impact resistance.

[0020]

Since the window for the electrical equipment storage box of the present invention is constructed as described above, it is slightly susceptible to vibration or shaking when the window glass plate 2 is subjected to a mechanical shock. Since the window glass plate 2 can move and no unreasonable force is applied to the window glass plate 2, the impact resistance is good and the workability is greatly improved. In addition, sufficient sealing performance is maintained while eliminating the need for a packing having a complicated shape as in the past. Further, when the packing is integrally molded, the work of attaching and fixing the window becomes easy, and the work of adhering is not required, so that the work time can be shortened and the workability is improved. Therefore, the present invention has an extremely great practical value as a window for an electric equipment storage box that solves the conventional problems.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part for explaining an embodiment of the invention.

FIG. 2 is a sectional view of an essential part for explaining an embodiment of the invention.

FIG. 3 is a perspective view of a conventional frame member attachment.

FIG. 4 is a cross-sectional view showing a conventional frame member attachment main part.

[Explanation of symbols]

11 face plate material, 12 window opening, 13 peripheral portion, 16 bolt hole, 17 nut, 2 window glass plate, 3 packing, 4
Frame member, 41 outer periphery, 42 inner periphery, 43 groove wall, 4
4 groove wall, 5 mounting plate material, 51 outer peripheral side, 52 inner peripheral side, 6 mounting bolt.

Claims (3)

(57) [Claims] 1. A window for an electric equipment storage box in which a window glass plate is attached to a peripheral portion of a window opening provided in a face plate material of the electric equipment storage box via a frame member, the back side of the frame member. Are located at multiple locations between the edge of the window glass plate and the edge of the plate surface material.
To such embedded nut provided, and passes can be attached for the plate material subjected to the peripheral inner from the outer periphery of the frame member, the embedded Na
It is attached by the mounting bolts screwed into the
The face plate material is sandwiched between the mounting plate material and the outer periphery, and the window glass plate is sandwiched between the inner periphery and the mounting plate material, and the outer periphery and the inner periphery of the frame member A wobbleable packing is provided on the contact surface between the face plate material and the window glass plate , and on the back surface side of the frame member between the embedded nuts.
Is a pair that projects along the edges of the window glass plate and the plate surface material.
To protect the edge of the window glass plate by forming the groove wall of
When the mounting bolt is screwed into the embedded nut,
The upper end of the insertion slot of the
Regulates pressure on both face plate and window glass
A window for electrical equipment storage boxes, which is characterized in that 2. The frame member is made of synthetic resin, and a packing formed in a ridge shape by two-color molding is provided on a contact surface between the face plate material and the window glass plate from the outer periphery to the inner periphery. The window for the electrical equipment storage box according to claim 1. 3. The window for an electric device storage box according to claim 1, wherein at least a tip portion of the packing is formed into a flexible hollow shape, a sponge shape, a jagged shape, or a tapered shape.