JP2003038921A - Structure for attaching filter unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to attach a filter unit from the outside of a box, to reduce the number of processes for forming holes and to improve workability. SOLUTION: Insertion holes 4c are formed at four corners of a frame part 4b of a filter unit 1, and attaching screws 8 are passed through the insertion holes 4c from the front face of the frame part 4b and fixing tools 7 are turnably screwed to the rear face of the frame part 4b. Rotation stopping parts 4d are each arranged in a protruding condition in the neighborhood of each fixing tool 7 at the rear face of the frame part 4b, and the attaching screws 8 are fastened. When each fixing tool 7 is turned in the outside direction, the fixing tool 7 is brought into contact with the rotation stopping part 4d, thereby the rotation is inhibited. Further, when the attaching screws 8 are fastened, the fixing tools 7 move so as to approach to the frame parts 4b, and a side plate 6a of the box 6 is held by the frame part 4b and the curved part of each fixing tool 7 and thereby the filter unit 1 is fixed.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a filter unit for ventilating the inside of a box. 2. Description of the Related Art Conventionally, as shown in FIG. 3, a filter unit 11 accommodates a filter 12 inside and a filter accommodating portion 14a to which a ventilation fan 13 is attached on the back.
The main body 14 has a frame portion 14b extending around the periphery of the front opening of the filter housing portion 14a, and a panel 15 for closing the front opening of the filter housing portion 14a of the main body 14. The panel 15 has a plurality of slit holes 15a.
Are formed and fixed by screwing the four corners. In order to attach the filter unit 11 to the opening 16b formed in the side plate 16a of the box 16, the frame unit 14b
A screw insertion hole 14c is formed in each of the four corners through which the mounting screw 18 is inserted, and the box 16 facing the screw insertion hole 14c.
The body 14 is fitted into the opening 16b of the box 16 and pressed by hand.
The mounting screw 18 is inserted through the screw insertion hole 14c of the frame portion 14b and the screw insertion hole 16c of the box body 16 from outside, and is screwed and fixed to the nut 19 inside the box body 16. In the conventional filter unit mounting structure, it is necessary to perform the mounting work on the outside and inside of the box while holding down the main body.
It was very difficult to do with a person. Also, since there are many holes to insert the mounting screws, it takes time and effort,
If there is no dimensional accuracy, the screw insertion hole of the filter unit and the screw insertion hole of the box are shifted, making it difficult to mount. [0004] In view of the above problems, an object of the present invention is to provide a filter unit mounting structure that can be mounted from the outside of a box body, reduces drilling holes, and improves workability. [0005] In order to achieve the above object, in a structure for mounting a filter unit mounted on an opening formed in a side plate for ventilating the inside of a box, a frame of the filter unit is provided. A screw insertion hole is drilled at an appropriate place, a mounting screw is inserted into the screw insertion hole from the front of the frame, and a fixing screw is screwed into a position corresponding to the inside of the opening of the box on the back of the frame, When the fixing device is rotated and turned outward by tightening the mounting screw, it stops against rotation by abutting against the detent part protruding from the back of the frame, and it is fixed to the frame by further tightening the mounting screw It is characterized in that the side plate of the box is clamped and fixed with the tool. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Screw insertion holes are formed at four corners of a frame of a filter unit, and mounting screws are inserted through the screw insertion holes from the front of the frame to screw a fixing member on the back of the frame. Combine. In the vicinity of the fixture on the back side of the frame part, a detent is projected, and the mounting screw is tightened so that when the fixture rotates and faces outward, it comes into contact with the detent and prevents rotation. I do. When the mounting screw is further tightened, the fixture moves so as to approach the frame, and the filter unit is fixed by holding the side plate of the box between the frame and the curved portion of the fixture. An embodiment of a filter unit mounting structure according to the present invention will be described with reference to FIGS. 1 and 2. FIG. The filter unit 1 houses therein a filter 2 indicated by diagonal lines in the drawing, and a filter housing portion 4a on the back side of which a ventilation fan 3 is mounted, and a frame portion stretched around a front opening edge of the filter housing portion 4a. 4b, and a panel 5 for closing the front opening of the filter housing 4a of the main body 4. A plurality of slit holes 5a are formed in the panel 5, and four corners are screwed and fixed. Box 6 for mounting filter unit 1
Has a rectangular opening 6b smaller than the frame 4b of the filter unit 1 in the side plate 6a. On the back surface of the four corners of the frame portion 4b of the filter unit 1, a fixing member 7 is provided at a position corresponding to the inside of the opening 6b of the box 6 at the time of mounting. The fixing tool 7 has a curved portion 7a formed on the distal end side, a tapped hole 7b formed on the base end side, and a tap which is formed by inserting the mounting screw 8 from the front side into the screw insertion holes 4c formed in the four corners of the frame 4b. It is screwed into the hole 7b. To attach the filter unit 1 to the opening 6b, first, the filter housing 4a is fitted into the opening 6b from the outside of the box 6 with the curved portion 7a of the fixture 7 facing inward, The portion 4b is brought into contact with the side plate 6a of the box 6. Then the mounting screw 8 is tightened. When the mounting screw 8 is tightened, the fixture 7 also rotates in the same direction. A detent 4d is protruded in the vicinity of the fixing member 7 on the back surface of the frame portion 4b, and when the curved portion 7a on the distal end side of the fixing tool 7 faces outward, the detent 4d comes into contact with the detent 4d and is fixed. The rotation of the tool 7 is prevented. Therefore, when the mounting screws 8 are further tightened, the fixture 7 is
The filter unit 1 is moved so as to approach the position b, and the frame unit 4b and the curved portion 7a of the fixture 7 sandwich the side plate 6a of the box 6 to fix the filter unit 1. In the present embodiment, the fixing members 7 are provided at the four corners of the frame portion 4b of the filter unit 1. However, the present invention is not limited to this. Although a ventilation fan is mounted on the back of the filter unit in this embodiment, the filter unit alone can be used without mounting a ventilation fan. The attachment position of the filter unit is not limited to the side plate of the box, and may be attached to the top plate of the box. As described above, in the mounting structure of the filter unit mounted on the opening formed in the side plate for ventilating the inside of the box, the screw insertion hole is provided at an appropriate position in the frame of the filter unit. Drill, insert the mounting screw from the front of the frame into the screw insertion hole, screw the fixing tool into the position corresponding to the inside of the opening of the box on the back of the frame, and fix it by tightening the mounting screw When the tool rotates and faces outward, it comes into contact with the rotation stop protruding from the back of the frame to prevent rotation, and further tightens the mounting screw to secure the side plate of the box with the frame and the fixture. Can be installed from the outside of the box, so that it can be easily installed by one person. There is such an excellent effect.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing a filter unit of the present invention. FIG. 2 is an explanatory view showing a method of mounting a filter unit of the present invention. FIG. 3 is a perspective view showing how a conventional filter unit is attached. [Description of Signs] 1 Filter unit 4 Main body 4a Filter storage portion 4b Frame portion 4c Screw insertion hole 4d Detent member 6 Box 6a Side plate 6b Opening 7 Fixture 7a Curved portion 7b Tapped hole 8 Mounting screw

Claims (1)

Claims 1. In a mounting structure of a filter unit mounted on an opening formed in a side plate for ventilating the inside of a box, a screw insertion hole is formed at an appropriate position in a frame of the filter unit. The mounting screw is inserted through the screw insertion hole from the front surface of the frame portion, and a fixing tool is screwed into a position corresponding to the inside of the opening of the box body on the back surface of the frame portion, and When the fixing tool is rotated and turned outward by tightening, the fixing tool is brought into contact with a rotation preventing portion protruding from the back surface of the frame portion to prevent the rotation, and further tightens the mounting screw to fix the frame portion. A mounting structure for a filter unit, wherein a side plate of the box is sandwiched and fixed with the fixing tool.