JP2016016394A - Filter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent disjoining of crosspieces by simple structure in a filter device which sandwiches a pleat-like filter between a crosspiece joined to an upper frame body of an upper frame and a crosspiece joined to a lower frame body of a lower frame.SOLUTION: The respective crosspieces 13 of an upper frame 11 are constituted so that two crosspieces 13 to be arranged along a valley part 2 of adjacent pleat folds by being viewed from an upper surface side of a filter 1 are annularly formed of a single metal wire rod with a joining part 16 to be joined to an upper frame body 12 between the two crosspieces 13, fillet welding of the joining part 16 is linearly performed to the upper frame body 12, and the respective crosspieces 23 of a lower frame 21 are also similarly joined to a mounting frame 24 of a lower frame body 22 in a pair of two crosspieces. Thus, joining strength is improved by increasing joint area of the respective crosspieces 13, 23, rigidity to external force in a lateral direction can be raised, and disjoining of the crosspieces 13, 23 can be certainly prevented by simple structure.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a filter device incorporating a pleated filter.

  Air purifiers used for air conditioning and ventilation in buildings and factories are generally provided with a filter device that incorporates a filter in a frame attached to the inside (air passage) of a filter box or duct, and air is supplied to the filter. By letting it pass, foreign matter contained in the air is captured by a filter to clean the air. And in the filter apparatus, since filtration performance falls as the foreign material which the filter capture | acquired increases, in many cases, the filter was incorporated in the frame so that the filter could be replaced | exchanged regularly. Further, in order to reduce the frequency of filter replacement, a filter incorporating a pleated filter having a large filtration area by forming a plurality of folds parallel to each other is often used.

  By the way, the filter device incorporating the pleated filter as described above is arranged along the valley portion of the pleat fold when viewed from the upper surface side of the filter so that the filter can be easily replaced with a simple structure. The upper frame with a plurality of bars attached to the upper frame body and the lower frame with the plurality of bars arranged along the valley of the pleat fold viewed from the lower surface side of the filter are fitted to each other. By combining them, there has been proposed a structure in which a filter is sandwiched between each crosspiece of the upper frame and each crosspiece of the lower frame (see, for example, Patent Documents 1 and 2).

JP 2006-326544 A JP2011-000501A

  However, in a filter device that holds a pleated filter between a plurality of crosspieces of an upper frame and a lower frame as described above, usually, a metal upper frame body or a lower frame is formed at each end of a crosspiece formed of a metal wire. Since it is welded to the main body, it is difficult to ensure sufficient bonding strength between each crosspiece and the upper frame main body or the lower frame main body. In other words, fillet welding is often performed after spot welding for welding to the upper frame body or lower frame body of the beam, but spot welding has a small bonding area, so the bonding strength is low, and fillet welding is the welding part of the beam. Since it is difficult to control the amount of penetration, the bonding strength is difficult to stabilize, and if the amount of penetration is suppressed so that it cannot be joined due to excessive melting, the bonding strength tends to decrease. For this reason, when the operator who replaces the filter grips a plurality of crosspieces together and engages or releases the upper frame and the lower frame, the crosspiece and the upper frame main body or the lower frame main body May be disconnected, and it may take time to repair.

  In view of this, the present invention is a filter device for holding a pleated filter between a crosspiece joined to the upper frame main body of the upper frame and a crosspiece joined to the lower frame main body of the lower frame. The challenge is to make it possible.

  In order to solve the above-described problems, the present invention provides a filter formed in a pleat shape and a plurality of bars arranged along a valley portion of a pleat fold as viewed from the upper surface side of the filter. An upper frame that is attached, and a lower frame that is attached to a lower frame main body with a plurality of bars arranged along a valley portion of a pleat fold when viewed from the lower surface side of the filter, the upper frame and the lower frame In the filter device in which the filter is sandwiched between the crosspieces of the upper frame and the crosspieces of the lower frame by being fitted to each other, at least a part of each of the crosspieces of the upper frame and the lower frame is Two crosspieces arranged along valleys of adjacent pleat folds as viewed from the upper surface side or the lower surface side are united with a joint portion joined to the upper frame main body or the lower frame main body between the two crosspieces. The structure formed with the member of this was employ | adopted.

  That is, two crosspieces arranged along the valleys of adjacent pleat folds of the filter are formed with a single member together with joints arranged between one end and between the other ends, and each joint Compared to the case where the crosspieces are joined to the upper frame main body or the lower frame main body one by one at a both ends, the crosspiece area is increased and the horizontal is increased by simply connecting the section to the upper frame main body or the lower frame main body. The rigidity against the external force in the direction can be increased to prevent the disconnection.

  In the above configuration, if the joining portion is linearly welded to the upper frame main body or the lower frame main body, the joining strength of the crosspieces can be further improved and the disconnection can be prevented more reliably.

  In the filter device of the present invention, as described above, at least some of the plurality of upper frame bars and the lower frame bars sandwiching the pleated filter are disposed in the valley portions of the adjacent pleat folds. Since the two bars arranged along with the joint part joined to the upper frame body or the lower frame body are formed of a single member, the joining area of the bars is increased and the lateral external force is prevented. Rigidity can be increased and disconnection can be prevented.

External perspective view of the filter device of the embodiment (with the filter removed and the upper frame opened) Sectional view along the line II-II when the upper frame is closed with the filter of FIG. Sectional view along line III-III in FIG. The perspective view explaining the attachment structure of the crosspiece of the upper frame of FIG. 1, and a lower frame

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, the filter device includes a filter 1 formed in a pleat shape, an upper frame 11 in which a plurality of bars 13 are attached to an upper frame main body 12, and a plurality of filters in a lower frame main body 22. And a lower frame 21 to which a crosspiece 23 is attached.

  The filter 1 is formed by bending a rectangular sheet-shaped filter medium into a pleat shape, and pleat folds extending in a direction perpendicular to the longitudinal direction are formed at a constant pitch in the longitudinal direction. Then, as will be described later, each crosspiece 13 of the upper frame 11 is arranged along the valley portion 2 of the pleat fold when viewed from the upper surface side, and the lower frame 21 is aligned along the valley portion 3 of the pleat fold when viewed from the lower surface side. Each crosspiece 23 is arranged.

  The upper frame 11 is obtained by attaching a plurality of crosspieces 13 to an upper frame body 12 having a rectangular frame shape in plan view formed of a metal wire so as to pass between both long sides. The upper frame main body 12 has one long side rotatably supported by the lower frame 21, and a reinforcing member 14 having an L-shaped cross section is attached to the other long side. And the latching metal fitting 15 latched by the lower frame 21 is attached to the longitudinal direction both ends of the reinforcement member 14 so that it may mention later.

  The lower frame 21 is provided with a rectangular frame-shaped mounting frame 24 formed of a metal wire on the inside of a rectangular parallelepiped lower frame main body 22 that opens up and down, and between both long sides of the mounting frame 24. A plurality of crosspieces 23 are attached so as to pass. The lower frame main body 22 is provided with a plurality of hinges 25 at the upper opening edge continuous with the upper end of the rear surface, and the hinges 25 rotatably support one long side of the upper frame main body 12 of the upper frame 11. doing.

  The lower frame main body 22 has a plurality of support pieces 26 that are cut upward and inward at the lower portions of the front and rear surfaces thereof, and a mounting frame is provided between each support piece 26 and the inner walls of the front and rear surfaces. The attachment frame 24 is supported by caulking each support piece 26 in a dogleg shape with the long sides of the 24 inserted.

  And the upper part of the front part of the lower frame main body 22 is formed with a dog-shaped locking piece 27 that is cut downward and inwardly, and the upper frame 11 is moved forward from the state of FIG. As shown in FIG. 2, each of the locking pieces 27 is fitted into the locking holes 15 a provided in the locking metal fitting 15 of the upper frame 11, so that the upper frame 11 and the lower frame are closed. 21 is held in a state of being fitted to each other.

  The pitch in the longitudinal direction of the filter 1 between the bars 13 and 23 of the upper frame 11 and the lower frame 21 is twice the pitch of the pleat folds of the filter 1. And the crosspiece 13 of the upper frame 11 and the crosspiece 23 of the lower frame 21 are arrange | positioned in the state which shifted | deviated by the pitch of the pleat fold of the filter 1. FIG. Thus, as shown in FIGS. 2 and 3, when the upper frame 11 and the lower frame 21 are fitted to each other, the upper frame 11 extends along the valley 2 of the pleat fold when viewed from the upper surface side of the filter 1. Each crosspiece 13 is located, each crosspiece 23 of the lower frame 21 is located along the valley 3 of the pleat fold when viewed from the lower surface side of the filter 1, and each crosspiece 13 of the upper frame 11 and each crosspiece 23 of the lower frame 21. The filter 1 is sandwiched between and.

  Here, as shown in FIGS. 3 and 4, each crosspiece 13 of the upper frame 11 includes two crosspieces 13 arranged along the valley portions 2 of the pleat folds adjacent to each other when viewed from the upper surface side of the filter 1. A single metal wire is formed in an annular shape together with a joint 16 joined to the upper frame body 12 between the two bars 13. Similarly, each crosspiece 23 of the lower frame 21 includes two crosspieces 23 arranged along the valley 3 of the pleat fold adjacent to each other when viewed from the lower surface side of the filter 1. It is formed in an annular shape with a single metal wire together with a joint portion 28 joined to the mounting frame 24 of the main body 22. Although not shown in FIG. 4, the joints 16 of the crosspieces 13 of the upper frame 11 and the joints 28 of the crosspieces 23 of the lower frame 21 are on the front side of the apparatus between the ends of a single wire. It has become a match.

  And as the material of the metal wire forming the mounting frames 24 of the crosspieces 13 and 23 and their joint portions 16 and 28, the upper frame main body 12 and the lower frame main body 22, a material having a weldability such as stainless steel is used. The joints 16 and 28 of the crosspieces 13 and 23 are linearly fillet welded to the mounting frame 24 of the upper frame body 12 or the lower frame body 22. By performing fillet welding in a linear manner in this way, high joint strength can be stably obtained even if there is some variation in the amount of penetration in the welding direction of the weld.

  As described above, the filter device includes two bars 13 disposed along the valleys 2 and 3 of the pleat folds adjacent to the filter 1 for the bars 13 and 23 of the upper frame 11 and the lower frame 21. 23 is formed annularly with a single metal wire together with joints 16 and 28 arranged between one end and between the other ends, and each joint 16 and 28 is formed as an upper frame main body 12 or a lower frame main body. Since the fillet weld is linearly welded to the mounting frame 24 of 22, the crosspieces 13 and 23 can be joined with a simple configuration equivalent to the case where the crosspieces are joined to the upper frame main body or the lower frame main body one by one at both ends. The area can be increased to improve the joining strength, and the rigidity against the external force in the lateral direction can be increased, and the joining of the bars 13 and 23 can be reliably prevented.

  Therefore, when the filter 1 is replaced, there is less possibility that the joining of the crosspieces 13 and 23 and the accompanying repair work will occur, and the work efficiency can be improved.

  In the above-described embodiment, all the crosspieces 13 and 23 are formed in a ring shape together with the joint portions 16 and 28 and joined together in one set. However, there is a possibility that a lateral external force may be applied. About a low crosspiece, you may make it join one by one like the past.

DESCRIPTION OF SYMBOLS 1 Filter 2, 3 Valley part of pleat fold 11 Upper frame 12 Upper frame main body 13 Crosspiece 16 Joint part 21 Lower frame 22 Lower frame main body 23 Crosspiece 24 Mounting frame 28 Joint part

Claims (2)

A filter formed in a pleat shape, an upper frame in which a plurality of bars arranged along a valley portion of a pleat fold viewed from the upper surface side of the filter is attached to the upper frame body, and a lower surface side of the filter. A plurality of bars arranged along a valley portion of the pleat fold, and a lower frame attached to the lower frame main body, and by fitting the upper frame and the lower frame to each other, In the filter device that sandwiches the filter with each of the crosspieces of the lower frame,
At least a part of the crosspieces of the upper frame and the lower frame includes two crosspieces arranged along valleys of adjacent pleat folds when viewed from the upper surface side or the lower surface side of the filter. The filter device is formed of a single member together with a joint portion joined to the upper frame body or the lower frame body.   The filter device according to claim 1, wherein the joint portion is linearly welded to the upper frame body or the lower frame body.

Images