JPH0135512Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a shock absorbing cushion device for opening and closing doors used in electrical equipment such as indoor power distribution boxes and control panels.

In an indoor power distribution box or the like, a large number of measurement and control instruments such as various meters and relays are mounted on the front door or rear door of the power distribution box.

Many of these meters and relays belong to precision instruments, and when opening and closing the door, especially when closing it,
A shock may be applied to these precision instruments mounted on the door, causing them to lose their accuracy, malfunction, or even malfunction. In addition, the painted surface of the contact surface of the door may be damaged or peeled off due to a collision, causing rust.

For this reason, it is common practice to provide the door with a cushion having a suitable cushioning effect to absorb or buffer the impact force generated when the door is closed.

This shock-absorbing cushion is generally made of a plastic material that has excellent impact resistance, abrasion resistance, weather resistance, etc., and has appropriate elasticity, such as nylon, polyethylene, polypropylene, polyacetal, synthetic rubber, polyurethane, etc. Multiple pieces are attached to the door side or door receiving side.

The present invention provides a shock absorbing cushion device that does not damage installed meters and relays, prevents the painted surface of the door from peeling off, and has good work efficiency.

Hereinafter, conventional examples and embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 shows a partial perspective view of a door of a box such as a power distribution box or a control panel, where 1 indicates the box and 2 indicates the door.

FIG. 2A is a plan sectional view taken along the line A--A in FIG. 1, showing a state in which a conventional shock absorbing cushion is installed.

In this conventional example, the cushion 3 is attached to the folded surface 2' at the peripheral end of the door 2 processed into a letter shape, but the vertical width H of the surface of the door 2 and the folded surface 2' is narrow, and the folded surface When the width D of 2' becomes wider, there is a drawback that sheet metal processing becomes difficult.

In the example shown in Fig. 2B, in order to eliminate the difficulty of this processing, the folded surface 2' is formed with a separate L-shaped metal fitting 22, but in this case, the L-shaped metal fitting 22 is fixed to the door 2 by welding or the like. In addition to the problem of requiring extra processing time and the need for additional processing time, there were also problems with the painting process, such as the need for internal painting.

On the other hand, regarding the attachment of the cushion 3, the conventional example has problems in terms of the installation work and the number of man-hours required for installation.

That is, in the case of FIG. 3A, a bolt 4 is screwed into the recess of the cushion 31 having a recess in the center, and the cushion 31 is fixed. A screw tightening tool is required.

In addition, as shown in FIG. 3B, the protrusion of the T-shaped cushion 32 is provided with a bulge, and this protrusion is driven into a hole provided in the folded surface 22 of the door 2 (FIG. 2). This method does not require tap hole drilling and can reduce the number of processing steps, but on the other hand, it is necessary to use a hammer or the like to drive into the hole in the folded surface 22, which may cause impact to the door. This may cause damage to the meters and relays installed on the door.

As mentioned above, the conventional cushioning cushions have various disadvantages.

The present invention eliminates these drawbacks, prevents the painted surface of the door from peeling off without damaging the installed meters and relays, eliminates the need for installation tools and L-shaped fittings 22, and is economical. Moreover, the present invention provides a cushioning cushion device with excellent workability.

FIG. 4 is a plan sectional view of the door portion showing an embodiment of the present invention, FIGS. 5 and 6 are enlarged partial views showing the installed state of the cushioning cushion device of the present invention, and FIG. An example is shown. FIG. 8 shows another embodiment applied to a two-stage folding door. Door 2 in Figure 4
A retaining hole 11 is provided at the tip of a bent portion provided at the peripheral end of the cushion, and a U-shaped plastic cushioning cushion 12 can be inserted with one touch.

In addition, the hole 11 for preventing it from coming off is an NC turret.
Punch press automatically punches holes, saving labor.

To explain in detail with reference to FIGS. 5 and 6, 12 is a U-shaped plastic cushioning cushion, which has leg portions 12a and 12a' facing each other on both sides of the cushion portion 12' of the cushion 12, and has leg portions 12a and 12a' on the inner side. A protrusion 13 having an inclined part 14 toward the base of the leg in the middle part.
are provided on both sides.

The inclined portion 14 of the projection 13 has a circular base and a substantially semicircular tip.

Further, the ends of the legs 12a, 12a' are formed with inwardly facing chamfered parts 15, so that the ends of the bent parts of the door can be easily inserted into the legs 12a, 12a'. . Since the leg portions 12a, 12a' have chamfered portions 15 at their tips, the leg portions 12a, 1 of the cushion 12 can
2a' widens, and the protrusion 13 can be easily fitted into the locking hole 11 provided in the door 2 with one touch.

Since the purpose of the U-shaped cushioning cushion 12 is to cushion the impact force generated when closing the door,
Naturally, elastic plastic is used, and when worn, the legs 12a, 12 of the cushion 12
Even if a' widens, it is possible to restore the original shape by fitting the protrusion 13 into the retaining hole 11.

FIG. 7 shows another embodiment, and FIG.
The difference from FIG. 6 is that the chamfered portions 15' at the tips of the legs 12b and 12b' of the cushioning cushion 12 are placed on the outside. It is located in a place where it will not fall off easily even if it is attached.

Fig. 8 shows another embodiment applied to a door 32 that is bent in two stages to increase the strength of the door, and a notch hole 31 is provided in a part of the folded part of the door to provide a U-shaped buffer as shown in Fig. 5. It is equipped with a cushion 12.

Although the protrusion 13 described above has a circular base, this shape is not necessarily limited to a circle, and may be a polygonal shape such as a square or hexagon. Any material may be used as long as it easily engages with the retaining hole 11 provided in the curved portion.

As mentioned above, the present invention allows the plastic U-shaped cushioning cushion to be installed with a single touch, so it does not damage the mounted instruments and relays, prevents the door paint surface from peeling off, and is economical. It has the effect of improving work efficiency.

[Brief explanation of the drawing]

Fig. 1 is a partial perspective view of the conventional example, Fig. 2 is a plan sectional view showing the door portion of the conventional example, Fig. 3 is a partial sectional plan view of the cushion mounting part of the conventional example, and Fig. 4 is a partial sectional view of the cushion mounting part of the conventional example. A plan sectional view of the door portion showing the embodiment, FIG.
FIG. 6 is an enlarged partial front view and an enlarged partial side view showing the cushion attachment part of the present invention, and FIGS.
The figure is a partially sectional plan view showing another embodiment. 2 is a door, 11 is a hole for preventing slipping out, 12 is a cushioning cushion of the present invention, 12' is a cushion part,
12a, 12a' and 12b, 12b' are leg parts, 13
14 is a protruding portion, 14 is an inclined portion, 15 and 15' are chamfered portions, and 32 is a two-stage folding door.

Claims (1)

[Scope of utility model registration request] Opposed legs are provided on both sides of the cushion,
The leg has a chamfered part at the tip thereof, and a protrusion having an inclined part toward the base of the leg is provided at the inner middle of the leg, and the protrusion is provided at the bent part of the peripheral edge of the door. A shock absorbing cushion device for opening and closing a door, characterized in that it engages with a hole for preventing slippage.