JP3549249B2 - Centrifugal fan spiral casing - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a spiral casing of a centrifugal fan used for air conditioning and ventilation ventilation.
[0002]
[Prior art]
Conventionally, in a spiral casing of this type of centrifugal fan, as shown in FIG. 8, a scroll plate 101 and two side plates 102 are fixed by welding or seam processing, and a duct is connected to an outlet 103. And an adapter 104 is attached.
[0003]
In the above configuration, the adapter 104 is detachable with the screw 101 or the like from the viewpoint of workability, and airtightness is not maintained between the outlet 103 and the adapter 104. It is good to increase the number of screws 105, but the workability is deteriorated. For this reason, it is widely known that a packing 106 is attached between the outlet 103 and the adapter 104 so that there is no air leakage at the time of blowing.
[0004]
[Problems to be solved by the invention]
In such a conventional spiral casing of a centrifugal fan, the packing 106 is required to maintain the airtightness of the joint surface 106 between the outlet 104 and the adapter 105, and the number of parts increases. There was a problem of doing.
[0005]
An object of the present invention is to provide a spiral casing of a centrifugal fan that maintains the airtightness of a joint surface 106 between an outlet 104 and an adapter 105 without increasing the number of assembling steps and material costs.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the spiral casing of the centrifugal fan according to the present invention has a first means in which the scroll plate and the two side plates are wider than the width of the pawl provided on the side plate. It is connected by inserting it into the claw hole and bending it, and by folding the upper and lower scroll plates as the mounting surface to attach the adapter for connecting the duct etc. to the outlet, and the left and right side plates parallel to the adapter side mounting surface And the adapter is fixed to only the left and right mounting surfaces of the side plate.
[0007]
Further, the second means is formed by bending the mounting surface of the first means for mounting the adapter so that the upper and lower sides are inclined toward the adapter toward the outside of the air outlet from the scroll plate, and the left and right sides serve as the adapter-side mounting surfaces. Formed by bending as described above.
[0008]
Further, the third means is that the upper and lower sides of the scroll plate are bent in parallel with the left and right mounting surfaces as the mounting surface for mounting the adapter of the first means, and the adapter side mounting surface which is in contact with the upper and lower mounting surfaces formed by the scroll plate is provided outside the outlet. The configuration is such that it is formed so as to be inclined toward the mounting surface side by the scroll plate.
[0009]
The fourth means may bend the mounting surface for mounting the adapter of the first means so that the left and right sides are inclined toward the adapter toward the outside of the outlet from the side plate, and the upper and lower sides of the scroll plate are parallel to the adapter mounting surface. Formed by bending as described above.
[0010]
The fifth means may be configured such that the left and right side plates are bent in parallel with the upper and lower mounting surfaces as mounting surfaces for mounting the adapter of the first means, and the adapter mounting surface in contact with the left and right mounting surfaces formed by the side plates is directed outward from the outlet. It is configured to be inclined to the left and right mounting surfaces by the side plates.
[0011]
[Action]
According to the first aspect of the present invention, since the claw provided on the scroll plate is inserted and connected to the claw hole wider than the claw width, the scroll plate tends to extend to a flat shape. The elastic force causes the upper and lower mounting surfaces of the scroll plate to protrude toward the adapter from the left and right mounting surfaces of the side plate. When the adapter is fixed to the mounting surface of the side plate with screws or the like, the mounting surface of the scroll plate is in close contact with the adapter-side mounting surface by the elastic force of the scroll plate, and airtightness can be maintained.
[0012]
Further, according to the configuration of the second means, when the mounting surface of the scroll plate is brought into close contact with the adapter-side mounting surface by the elastic force of the scroll plate by the first means, the mounting surface of the scroll plate is inclined and the adapter-side mounting surface is inclined. Since the elastic force at the time of coming into contact with the member is also applied, airtightness can be maintained.
[0013]
Further, according to the configuration of the third means, when the mounting surface of the scroll plate is brought into close contact with the adapter-side mounting surface by the elastic force of the scroll plate by the first means, the mounting surface of the scroll plate is inclined by tilting the adapter-side mounting surface. Since the elastic force at the time of coming into contact with the member is also applied, airtightness can be maintained.
[0014]
Further, according to the configuration of the fourth means, when the mounting surface of the scroll plate is brought into close contact with the adapter-side mounting surface by the elastic force of the scroll plate by the first means, the mounting surface of the side plate is inclined to be attached to the adapter-side mounting surface. Since the elastic force at the time of contact is also applied, airtightness can be maintained.
[0015]
Further, according to the configuration of the fifth means, when the mounting surface of the scroll plate is brought into close contact with the adapter-side mounting surface by the elastic force of the scroll plate by the first means, the adapter-side mounting surface is inclined to be attached to the mounting surface of the side plate. Since the elastic force at the time of contact is also applied, airtightness can be maintained.
[0016]
【Example】
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1, 2 and 3. FIG. The same parts as those in the conventional example are denoted by the same reference numerals, and detailed description is omitted.
[0017]
As shown in the figure, a plurality of pawls 1 are provided on a side of a scroll plate 101 made of a metal having an elastic force which is to be restored against bending, for connection with a side plate 102. Are provided with the same number of pawl holes 2 as the number of the pawls 1 for inserting the pawls 1 provided on the scroll plate 101. The scroll plate 101 is bent to form a spiral shape, a plurality of claws 1 are inserted into a plurality of corresponding pawl holes 2 and then bent, and the scroll plate 101 and the two side plates 102 are connected. In the outlet 103, the upper and lower mounting surfaces 3 are parallel to the scroll plate 101 and the left and right mounting surfaces 4 are parallel to the upper and lower adapter side mounting surfaces 5 and the left and right adapter side mounting surfaces 6 for mounting the adapter 104. It is formed by bending so that
[0018]
At this time, the scroll plate 101 receives an elastic force that attempts to recover from bending, and the width of the pawl hole 2 is wider than the width of the pawl 1. Therefore, the scroll plate 101 holds the pawl hole 2 in the pawl hole 2. Is deformed so as to return flat by a distance that can be moved. As a result, the upper and lower mounting surfaces 3 project toward the adapter 104 from the left and right mounting surfaces 4. When the screw 105 is tightened to attach the adapter 104, the upper and lower adapter-side mounting surfaces 5 come into contact with the upper and lower mounting surfaces 3 protruding toward the adapter 104. When the screw 105 is further tightened, the upper and lower mounting surfaces 3 are pressed against the adapter 104 and come into close contact with each other, and the scroll plate 101 is deformed in the pawl hole 2 by a distance that allows the pawl 1 to move. When the left and right mounting surfaces 4 and the left and right adapter-side mounting surfaces 6 are in close contact, the upper and lower mounting surfaces 3 and the upper and lower adapter-side mounting surfaces 5 are in close contact with elastic force, so that airtightness is maintained and air leakage occurs. do not do.
[0019]
As described above, according to the spiral casing of the centrifugal fan according to the first embodiment of the present invention, the airtightness between the outlet 103 and the adapter 104 can be maintained by the elastic force of the scroll plate 101.
[0020]
Next, a second embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.
[0021]
As shown in the figure, in order to mount the adapter 104, the upper and lower mounting surfaces 3 are bent so that the scroll plate 101 is inclined toward the adapter 104 toward the outside of the air outlet 103, and the left and right mounting surfaces 4 fold the side plate 102 right and left. And is formed so as to be parallel to the adapter-side mounting surface 6.
[0022]
When the screw 105 is tightened to attach the adapter 104, the upper and lower adapter-side mounting surfaces 7 come into contact with the ends 7 of the upper and lower mounting surfaces 3 protruding toward the adapter 104. Further, when the screw 105 is tightened, the upper and lower mounting surfaces 3 are pressed by the adapter 104, deformed and adhered to be parallel to the adapter-side mounting surface 5, and the scroll plate 101 is caught in the pawl hole 2. Deforms by the distance that 1 can move When the left and right mounting surfaces 4 and the left and right adapter-side mounting surfaces 6 are in close contact, the upper and lower mounting surfaces 3 and the upper and lower adapter-side mounting surfaces 5 are in close contact with elastic force, so that airtightness is maintained and air leakage occurs. do not do.
[0023]
Thus, according to the spiral casing of the centrifugal fan according to the second embodiment of the present invention, the airtightness between the outlet 103 and the adapter 104 can be maintained by the elastic force of the scroll plate 101 and the upper and lower mounting surfaces 3.
[0024]
Next, a third embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.
[0025]
As shown in the figure, in order to mount the adapter 104, the upper and lower mounting surfaces 3 bend the scroll plate 101, and the left and right mounting surfaces 4 bend the side plate 102 so as to be parallel to the left and right adapter side mounting surfaces 6. The adapter-side mounting surface 5 is formed so as to incline to the upper and lower mounting surfaces 3 toward the outside of the outlet 103.
[0026]
When the screw 105 is tightened to attach the adapter 104, the upper and lower adapter-side mounting surfaces 5 come into contact with the edges 7 of the upper and lower mounting surfaces 3 protruding toward the adapter 104. Further, when the screw 105 is tightened, the upper and lower adapter-side mounting surfaces 5 are pressed by the upper and lower mounting surfaces 3, and are deformed so as to be parallel to the upper and lower mounting surfaces 3 so as to be in close contact therewith. It deforms by the distance that the pawl 1 can move in 2. When the left and right mounting surfaces 4 and the left and right adapter-side mounting surfaces 6 are in close contact, the upper and lower mounting surfaces 3 and the upper and lower adapter-side mounting surfaces 5 are in close contact with elastic force, so that airtightness is maintained and air leakage occurs. do not do.
[0027]
As described above, according to the spiral casing of the centrifugal fan of the third embodiment of the present invention, the airtightness between the outlet 103 and the adapter 104 can be maintained by the elastic force of the scroll plate 101 and the upper and lower adapter-side mounting surfaces 5. it can.
[0028]
Next, a fourth embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.
[0029]
As shown in the drawing, in order to mount the adapter 104, the left and right mounting surfaces 4 are bent so that the side plate 102 is inclined toward the outside of the outlet 103 toward the adapter 104, and the upper and lower mounting surfaces 3 move the scroll plate 101 up and down. Is formed so as to be parallel to the adapter-side mounting surface 5.
[0030]
When the screw 105 is tightened to mount the adapter 104, the left and right adapter-side mounting surfaces 6 and the end sides 8 of the left and right mounting surfaces 4 come into contact. When the screw 105 is further tightened, the left and right mounting surfaces 4 are pushed by the adapter 104 and deform so as to be parallel to the left and right adapter-side mounting surfaces 6. The upper and lower adapter-side mounting surfaces 5 are in contact with the upper and lower mounting surfaces 3 protruding toward the adapter 104, and the upper and lower mounting surfaces 3 are in close contact with each other while being pressed by the adapter 104. Is deformed by the distance that the pawl 1 can move. When the left and right mounting surfaces 4 and the right and left adapter-side mounting surfaces 6 are completely in close contact, the upper and lower mounting surfaces 3 and the upper and lower adapter-side mounting surfaces 5 are in close contact with elastic force, so that airtightness is maintained and air leaks. Does not occur.
[0031]
Thus, according to the spiral casing of the centrifugal fan of the fourth embodiment of the present invention, the airtightness between the outlet 103 and the adapter 104 can be maintained by the elastic force of the scroll plate 101 and the left and right mounting surfaces 4.
[0032]
Next, a fifth embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.
[0033]
As shown in the figure, in order to mount the adapter 104, the upper and lower mounting surfaces 3 bend the scroll plate 101, and the left and right mounting surfaces 4 bend the side plate 102 so as to be parallel to the left and right adapter side mounting surfaces 6. The adapter-side mounting surface 6 is formed so as to be inclined toward the left and right mounting surfaces 4 toward the outside of the outlet 103.
[0034]
When the screw 105 is tightened to mount the adapter 104, the left and right adapter-side mounting surfaces 6 and the end sides 8 of the left and right mounting surfaces 4 come into contact. When the screw 105 is further tightened, the left and right adapter-side mounting surfaces 6 are pressed by the left and right mounting surfaces 4 and deform so as to be parallel to the left and right mounting surfaces 4. The upper and lower adapter-side mounting surfaces 5 are in contact with the upper and lower mounting surfaces 3 protruding toward the adapter 104, and the upper and lower mounting surfaces 3 are in close contact with each other while being pressed by the adapter 104. Is deformed by the distance that the pawl 1 can move. When the left and right mounting surfaces 4 and the right and left adapter-side mounting surfaces 6 are completely in close contact, the upper and lower mounting surfaces 3 and the upper and lower adapter-side mounting surfaces 5 are in close contact with elastic force, so that airtightness is maintained and air leaks. Does not occur.
[0035]
Thus, according to the spiral casing of the centrifugal fan of the fourth embodiment of the present invention, the airtightness between the outlet 103 and the adapter 104 can be maintained by the elastic force of the scroll plate 101 and the left and right adapter-side mounting surfaces 6. it can.
[0036]
【The invention's effect】
As is apparent from the above embodiments, according to the present invention, the elastic force of the scroll plate maintains the airtightness between the outlet and the adapter, so that packing and the like are not required and the number of assembling steps and material costs do not increase. A spiral casing of a centrifugal fan that maintains airtightness and does not cause air leakage can be provided.
[Brief description of the drawings]
FIG. 1 is a side view of a spiral casing of a centrifugal fan according to a first embodiment of the present invention. FIG. 2 is a detailed view of attachment of the claw. FIG. 3 is a detailed view of attachment of an adapter to the outlet. FIG. FIG. 5 is a detailed view of an adapter attached to an outlet of a spiral casing of a centrifugal fan according to a second embodiment of the present invention. FIG. 5 is a detailed view of an adapter attached to an outlet of a spiral casing of a centrifugal fan according to a third embodiment of the present invention. FIG. 6 is a detailed view of the mounting of the adapter to the outlet of the spiral casing of the centrifugal fan according to the fourth embodiment of the present invention. FIG. 7 is the mounting of the adapter to the outlet of the spiral casing of the centrifugal fan according to the fifth embodiment of the present invention. Detailed view [Fig. 8] Side view of conventional spiral casing of centrifugal fan [Explanation of reference numerals]
First and second holes 3 Upper and lower mounting surfaces 4 Left and right mounting surfaces 5 Upper and lower adapter side mounting surfaces 6 Left and right adapter side mounting surfaces 101 Scroll plate 102 Side plate 103 Blow outlet 104 Adapter

Claims (5)

An adapter for connecting a scroll plate and two side plates by inserting a pawl provided on the scroll plate into a pawl hole wider than a pawl width provided on the side plate and bending the same, and connecting a duct or the like to an outlet. The centrifugal mechanism is characterized in that the upper and lower sides are formed by bending the scroll plate as the mounting surface, and the left and right sides are bent so that the side plate becomes parallel to the adapter side mounting surface, and the adapter is fixed only to the left and right mounting surfaces of the side plate. The spiral casing of the fan. The upper and lower sides are formed by bending the scroll plate so as to be inclined toward the adapter toward the outside of the outlet, and the left and right sides are formed by bending the side plate so as to be parallel to the adapter-side mounting surface. The spiral casing of a centrifugal fan according to claim 1, wherein The upper and lower scroll plates are bent in parallel with the left and right mounting surfaces as the mounting surface for mounting the adapter, and the mounting surface on the adapter side, which contacts the upper and lower mounting surfaces by the scroll plate, is inclined toward the outside of the air outlet toward the mounting surface by the scroll plate. The spiral casing of a centrifugal fan according to claim 1, wherein the spiral casing is formed. The mounting surface for mounting the adapter is formed by bending the side plate so that the left and right sides are inclined toward the adapter toward the outside of the outlet, and the top and bottom are formed by bending the scroll plate so as to be parallel to the mounting surface on the adapter side. The spiral casing of a centrifugal fan according to claim 1, wherein The left and right sides of the side plate are bent parallel to the upper and lower mounting surfaces as the mounting surface for mounting the adapter, and the adapter side mounting surface that is in contact with the left and right mounting surfaces by the side plate is inclined toward the outside of the outlet toward the left and right mounting surfaces by the side plate. The spiral casing of a centrifugal fan according to claim 1, wherein the spiral casing is formed.

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