JPS5912990Y2 - filter device - Google Patents

Description

[Detailed Description of the Invention] The outer frame of conventionally used filters is made of plywood made by laminating a plurality of veneers so that the fiber directions are alternately perpendicular to each other.

However, there is no perfect plywood, and for this reason, when air is blown through the filter, pressure is built up on the upstream side.
There is a drawback that unfiltered air leaks into the clean space from the fiber spaces and cracks in the plywood, and to prevent this, conventionally the cut surfaces are sealed with a sealant to allow the unfiltered air to leak into the clean space. However, there is also the drawback that dust adhering to the inner surfaces of both side panels of the plywood outer frame and dust leaking from defects on the plywood surface can directly enter the clean space. .

The present invention was devised from this viewpoint, and the outer frame is formed using plywood with the same fiber direction, and both ends of the filter medium are folded into the outer frame in multiple stages without inserting a separator. This filter device has the front and rear portions of the filter material sealed to the inner surfaces of both side plates of the outer frame with a sealant, and the upper and lower portions of the filter medium sealed to the upper and lower plates of the outer frame with a sealant. Without leaking contaminated air,
Another object of the present invention is to provide a filter device that is capable of trapping dust adhering to the inner surfaces of both side panels of an outer frame, and is easy to manufacture and has good workability.

An example of the implementation of the combined invention will be explained in detail with reference to a diagram.
Parallel plywood 2 is provided by laminating a plurality of veneers 1 whose fiber directions are all transverse to the length direction, and four parallel plywoods 2 are connected and fixed in a rectangular shape to form an outer frame 3.

Then, the filter medium 4 is appropriately folded to form a folded portion 5, and a separator 6 is interposed and fixed between each folded portion 5 to maintain a space, and both ends of the filter medium 4 are further folded to form a separator 6. The filter member 8 is shaped by providing a sealing portion 7 which is not interposed and fixed, and a sealant 10 is applied to the front and rear of the sealing portion 7 of the filter member 8 on the inner surface of both side plates 9 of the outer frame 3.
At the same time, the upper and lower parts of the filter member 8 are sealed to the upper and lower plates 11 and 12 of the outer frame 3 with a sealant 10, respectively.

As described above, in the present invention, a parallel plywood 2 is provided by laminating a plurality of veneers 1 whose fiber directions are all transverse to the length direction, and the parallel plywood 2 is connected and fixed to form an outer frame 3. On the other hand, the filter medium 4 is appropriately folded to form folded portions 5, and a separator 6 is interposed and fixed between each of the folded portions 5.
A filter member 8 is formed by further folding both ends of the filter medium 4 to provide a sealing portion 7 in which the separator 6 is not interposed and fixed. 7 is sealed with sealant 10, and the upper and lower parts of filter member 8 are sealed with sealant 9 on the upper and lower plates 11 and 12 of outside frame 3. There is no inflow, and since there is no cross-section in the outer frame 3 at the part that affects air blowing from the filter member 8 to the clean space, there is no need to close the cut surface, and furthermore, the side panels of the outer frame 3 Since the dust adhering to the inner surface of the filter member 9 is completely confined by the sealing part 7, there is no need to remove it, and by sealing the front and rear of the filter member 8, it is possible to control the test flow and air flow. It is convenient to use it from either side even if it is specified as such, and the present invention is particularly effective in clean rooms with a high cleanliness class, where positive pressure is applied to the filter outer frame.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention; FIG. 1 is an enlarged front view of parallel plywood, FIG. 2 is an overall front view, and FIG. 13 is an enlarged cross-sectional plan view of the main parts. ...Single board, 2...Parallel plywood, 3...Outer frame, 4...
・Filtering medium, 5...Folding part, 6...Separator, 7
Seal part, 8 Filter member, 9 Side plate, 10 Sealing agent, 11 Upper plate, 12...
Lower board.

Claims (1)

[Scope of utility model registration request] Parallel plywood 2 is provided by laminating a plurality of veneers 1 whose fiber directions are all parallel to the length direction, and the parallel plywood 2 is connected and fixed to form an outer frame 3, while the filter medium 4 is laminated. A folding portion 5 is provided by appropriately folding, and a separator 6 is interposed and fixed between each of the folded portions 5, and a seal portion 7 is provided in which both ends of the filter medium 4 are further folded and the separator 6 is not interposed and fixed.
are provided to shape the filter member 8, and both side plates 9 of the outer frame 3
The front and rear parts of the seal part 7 of the filter member 8 are sealed with a sealing material 10 on the inner surface of the outer frame 3, and the upper and lower plates 11 and 1 of the outer frame 3 are sealed.
2. A filter device formed by sealing the upper and lower parts of a filter member 8 with a sealing agent 9.