JPS5817616Y2 - Air “filter” tightening device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tightening device for an air filter that can be easily installed with one touch without causing air leakage.

An air filter is replaced with a new filter when the pressure loss increases by about 1.5 to 2 times due to clogging due to use.

For this reason, the filter is detachably attached.

Therefore, in the past, as shown in a partially sectional side view shown in FIG. 1, an air filter 4 is placed in an opening 2 of a mounting wall surface 1 with a gasket 3 interposed therebetween.

The bolts 5 installed at the four corners of the opening 20 are made so that the fastening fittings 6, that is, one end of the upper side, engage with the frame 7 of the filter 40.

After inserting the U-shaped fastener 6, a nut 8 is screwed onto the bolt 5, and the bolt 5 is tightened.

This method is good when the number of installed filters is small, but it is not suitable for cases where the number of installed filters is large, for example, 100 to 1000, such as in a dust-free room used for manufacturing semiconductor devices. When replacing the filter, the nut must be loosened and tightened every 5 bolts.

Therefore, there is a drawback that it requires a large number of operations and a large amount of time.

The present invention provides a tightening device that allows the air purifier to be attached and detached in a short time by simply bending the handle, thereby eliminating all the drawbacks of the conventional methods described above.

Next, the details will be explained using the drawings.

Figures 2a, b, and c are a partial front view, a partial left side view, and a plan view of an embodiment of the present invention showing a tightened state.

FIG. 3 is a partial front view showing the tightened state, and in each figure, the same reference numerals as in FIG. 1 indicate the same parts.

In Fig. 2, 1 is the mounting wall surface, 2 is the opening, 3 is the gasket, 4 is the air filter, 7 is its frame, 9 is a round rod for attaching the fastener, and the four corners of the opening 2 are It is installed on the mounting wall (see Figure 2C).

Reference numeral 6 denotes a U-shaped fastener, which can be vertically moved onto the round bar body 9 for mounting the fastener through a through hole (not shown) K provided on the same axis between the upper side 6a and the lower side 6b. inserted into.

Also, by selecting the lengths of the upper side 6a and the lower side 6b.

The tip crimping portion 6a' of the upper side engages with the upper surface of the frame 7, and at the same time, the lower side 6b is formed to be able to rotate around the round bar 9 without hitting the frame 7.

10 is a coil-shaped return spring body, 11 is a tightening operation tool with an inverted U-shaped cross section, which is inserted between the mounting wall surface of the round bar body 9 for fastening tool attachment and the lower side of the fastener 6; A tightening cam plate 1 that has a tightening release side 11a provided at one end at right angles to the upper end surface, and a tightening side 11b that intersects with this at an angle smaller than 90'.
1c and a handle portion 11d connected thereto.

The tightening operation tool 11 is attached to the tightening side 11b by a mounting hole (not shown) eccentrically provided so that the distance to the tightening side 11a is shorter than the distance to the tightening side 11b.
When contacting the upper side 6a of the fastener 6, the tip crimping part 6a' of the fastener is strongly pressed against the upper end surface of the frame 7, and the third
As shown in the figure, the tightening release side 11a is the upper side 5a of the fastener 6 [
When they come into contact, a large gap is created between the tightening release side 11a and the frame 1, and the upper side 6 of the tightening tool 6 is moved by the return spring body 10.
The tip end crimping part 6a' of a is pivoted 12 so as to be separated from the upper end surface of the frame body 7 by straddling the round rod body 9 for fastener attachment.

In this way, by operating the handle portion 11d and resisting the push-up blade of the return spring body 10, the 5GC tightening fastener 11 as shown in FIG. By tilting the arrow A)K, the tip crimping portion 6a' of the upper side 6a of the fastener 6 is
The lower surface of the filter presses down the upper end surface of the frame 7 of the filter.

That is, it can be tightened with one touch, and the tightening cam plate 11c can be eccentrically rotated with a small amount of effort by gripping the handle with the hand.

The spring force of the upper side 6a of the fastener 6 that engages with the upper end of the filter frame 7 can be easily selected to be, for example, 200 klli1 or more.

Therefore, tightening the high-performance air filter, which does not allow even the slightest air leak, can be done simply, quickly, and reliably.

In addition, since force is applied to the return spring body 10 in the direction of the shaft attachment part 12 via the tightening tool 6, the tightening side 11bFIn of the tightening operation tool 11 is forced to return to its original position. In other words, the tightening is never released.

Moreover, if the handle portion 11d is lifted in the direction of arrow B in FIG. 2 and positioned as shown in FIG.
The lower surface of the tip crimping portion 6a' of a moves upward due to the repulsive force of the return spring body 10, and is separated from the upper end surface of the filter frame to be untightened.

Therefore, each of the fasteners 6 provided at the four corners of the opening 2 is
If the upper side 6a of the fastener 6 does not interfere with lifting the filter 4 by rotating it, the filter can be easily replaced.

Although the present invention has been described above using one embodiment, the number of tightening devices can be reduced by tightening the shoulder portions of the frames of two air filters in common.

Fig. 4 is a partial view showing this example, and shows the round rod body 9 for mounting the fastener.
There are two filters 4a and 4b frame 7a.

A fastening tool 6 having a crimping portion 6a' long enough to span the shoulder portion of 7b is provided, and is operated by a tightening operation tool 11.

As is clear from the above explanation, according to the first proposal, the filter can be installed on the mounting wall within a short time by a simple operation of turning the handle upside down. It is highly effective.

[Brief explanation of the drawing]

Figure 1 is a partially sectional side view of a conventional tightening device, Figure 2a,
b and c are a partial front view, a partial left side view, and a plan view of one embodiment of the present invention showing the tightened state, FIG. 3 is a partial front view showing the unfastened state, and FIG. 4 is another embodiment of the present invention. It is a partial front view which shows an example. 1...Mounting wall surface, 2...Opening, 3.
...Putskin, 4...Air filter, 5.
...Bolt, 6...Tightening tool, 6a...
...Top side part, 6a'...Crimping part, 6b...
... Lower side part, 7 ... Filter frame, 9 ...
... Tightening tool mounting rod, 10... Spring body for return, 11... Tightening operating tool, 11a... Tightening release side, 11b... ...Tightening side. 11c...Tightening cam plate, 11d...Handle part. 12... shaft attachment part.

Claims (1)

[Claim for Utility Model Registration] Fastener mounting rods installed at each of the four corners of the opening of the air filter mounting wall, and rotated so that one end is located on the top surface of the air filter frame. The U-shaped fastener is attached to the fastener mounting rod so as to be movable up and down, and the fastener is installed between the lower side of the fastener and the mounting wall so that the fastener can be moved upward from the air purifier frame surface. It has a spring body that applies a pushing force to release the spring body, a tightening side that is perpendicular to g, and a tightening side that engages with the tightening tool during one rotation to release the tightening tool. It was eccentrically pivoted to the upper end of the fastener mounting rod so as to be in pressure contact with the frame of the air purifier. Operation: A tightening device for an air unit equipped with a tightening operation tool having a tightening cam plate with a handle.