WO2012023407A1

WO2012023407A1 - Duct

Info

Publication number: WO2012023407A1
Application number: PCT/JP2011/067405
Authority: WO
Inventors: 木村　光男; 和夫樋熊; 靖洋森
Original assignee: 株式会社ヤブサダイナミックス
Priority date: 2010-08-17
Filing date: 2011-07-29
Publication date: 2012-02-23
Also published as: JP2012042078A; JP4714794B1

Abstract

Provided is a duct which can be produced with a minimum increase in the production cost and with required strength assured. A duct is configured in such a manner that a single plate material is bent about 180 degrees at two bend portions to form, in order, a first plate material portion, a plate material portion between the two bend portions, and a second plate material portion, the plate material portion between the two bend portions is sandwiched between an end of the first plate material portion and an end of the second plate material portion to form an overlapped section at which three plate material portions are overlapped each other, and substantially the intermediate portion of the overlapped section is bent at substantially a right angle to form a corner.

Description

duct

The present invention relates to a duct structure used for air conditioning and the like.

As a duct used for air conditioning or the like, for example, the technique of Patent Document 1 below has been proposed. This duct is comprised from the duct main body and the flange for connecting ducts. The duct body is formed in a rectangular cross section by combining a plurality of duct constituent plates. The flange is formed by bending the end of each duct component plate at a right angle. However, in the duct of Patent Document 1, since a flange is simply formed by bending a part of the duct component plate at a right angle, the strength required for the duct cannot be ensured.

Therefore, for example, Patent Document 2 proposes a duct including a duct body, a flange, and a reinforcing portion. The duct body is formed in a rectangular cross section by combining a plurality of duct constituent plates. The flange is formed by bending the end of each duct component plate at a right angle. The reinforcing portion is configured to reinforce the duct at the flange. The reinforcing portion includes a reinforcing plate and a pressing piece. The reinforcing plate is integrally formed on the flange so as to face the rear side of the flange. The pressing piece is formed integrally with the reinforcing plate so as to be in close contact with the rear wall surface of the flange. The strength of the duct is improved by the reinforcing portion having this configuration.

Furthermore, the technique shown in Patent Document 3 has been proposed as a duct having a reinforcing portion of another aspect. This duct is comprised from the duct main body, the flange, and the reinforcement part. The duct body is formed in a rectangular cross section by combining a plurality of duct constituent plates. The flange is formed by bending the end of each duct component plate at a right angle. The reinforcing portion is configured to reinforce the duct in the duct body. This reinforcing part is composed of a “folded part (also referred to as a double part)” formed on a predetermined duct component plate and a bent formed on another duct component plate combined with the predetermined duct component plate. Part (also referred to as a single part).

The hull fold is an inserted portion formed by bending an end of the predetermined duct component plate. The helical fold further includes an extension along the end. The bent portion is an insertion portion formed by bending an end portion of the another duct component plate. The bent portion is inserted into the folded portion, and the folded portion is bent so that the extended portion of the folded portion overlaps the other duct component plate. This structure improves the strength of the duct.

Japanese Unexamined Patent Publication No. 2007-298234 Japanese Unexamined Patent Publication No. 7-91723 Japanese Unexamined Patent Publication No. 2002-168504

In the duct disclosed in Patent Document 2, the reinforcing portion includes a reinforcing plate and a pressing piece. For this reason, the material required for manufacture of a duct increases, and material cost becomes high in connection with this. The duct disclosed in Patent Document 3 is manufactured by inserting a bent portion into a folded portion and bending the extended portion so as to overlap another duct component plate. For this reason, a man-hour increases and a manufacturing cost becomes high in connection with this.

Therefore, in view of the above-described problems, the present invention has an object to provide a duct that can secure a necessary strength while suppressing an increase in manufacturing cost.

In the duct of the present invention, the first plate member portion, the plate member portion between the two bent portions, and the second plate member portion are obtained by folding a single plate member approximately 180 degrees at two bent portions. Formed in that order, and a three-layer overlapping portion is formed by sandwiching the plate portion between the two bent portions between the end portion of the first plate portion and the end portion of the second plate portion, A corner portion is formed by bending a substantially middle portion of the overlapping portion at a substantially right angle.

In the duct having the above-described configuration, a three-layer overlapping portion formed by folding a single plate material is bent at a substantially middle portion into a corner portion. With this configuration, a rise in material costs and an increase in overall manufacturing costs are suppressed, and the necessary strength is ensured.

In the duct of the present invention, the first plate member portion, the plate member portion between the two bent portions, and the second plate member portion are obtained by folding a single plate member approximately 180 degrees at two bent portions. Formed in that order, and a three-layer overlapping portion is formed by sandwiching the plate portion between the two bent portions between the end portion of the first plate portion and the end portion of the second plate portion, Of the corner portion formed by bending a substantially middle portion of the overlapping portion at a substantially right angle, and the first plate member portion and the second plate member portion, one plate member portion located on the front side of the overlapping portion, and Of the first plate member portion and the second plate member portion, the overlap portion of the other plate member portion so that the other plate member portion located inside the overlap portion is flush with the portion off the overlap portion. Bent by offsetting off the part A stepped portion, a duct body composed of a portion of the one plate material portion deviating from the overlapping portion, and a portion of the other plate material portion deviating from the overlapping portion, and a flange of the other duct A duct characterized by comprising a side surface comprising a flange connected to the outer surface.

According to the duct having the above-described structure, the increase in material cost and the overall manufacturing cost can be suppressed, and the reinforcement in the entire longitudinal direction of the duct is possible. When the duct is connected to the flange of another duct, a large external force works. It is possible to prevent the flange from being deformed. Furthermore, since the cross-sectional shape of the portion is changed by forming the stepped portion, the strength is improved accordingly.

In the duct of the present invention, the first plate member portion, the plate member portion between the two bent portions, and the second plate member portion are obtained by folding a single plate member approximately 180 degrees at two bent portions. Formed in that order, and a three-layer overlapping portion is formed by sandwiching the plate portion between the two bent portions between the end portion of the first plate portion and the end portion of the second plate portion, Since the corners are formed by bending the substantially middle part of the overlapping part at a substantially right angle, the necessary strength can be secured, and the rise in material costs can be suppressed, and the increase in the overall manufacturing cost can be suppressed. it can.

FIG. 1 is a perspective view showing a single structure of a duct according to an embodiment of the present invention. FIG. 2 is an exploded perspective view showing a single structure of the duct. FIG. 3 is a vertical perspective view of the duct of FIG. 1 cut at the center in the width direction (left-right direction). FIG. 4 is a cross-sectional view mainly showing duct reinforcing means. FIG. 5 is a transverse perspective view of the duct of FIG. 1 cut at the center in the longitudinal direction (front-rear direction). FIG. 6 is a side view showing the first manufacturing process of the duct reinforcing means. FIG. 7 is a side view showing the second manufacturing process of the duct reinforcing means. FIG. 8 is a side view showing a third manufacturing process of the duct reinforcing means. FIG. 9 is a side view showing the fourth manufacturing step of the duct reinforcing means. FIG. 10 is a side view showing a fifth step of manufacturing the duct reinforcing means. FIG. 11 is a side view showing details of the relationship between the flange portion of the duct and the connecting member. FIG. 12 is a side view showing reinforcing means in a duct according to another embodiment.

Hereinafter, the duct according to the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 5, a duct 1 according to an embodiment of the present invention includes a duct body 2, flanges 3 (in this case, joint flanges) formed at both ends in the longitudinal direction of the duct body 2, and It is comprised from the member 4 for connection (it is also called a corner piece).

As shown in FIG. 2, the duct main body 2 includes four upper plate members 5, one lower plate member 6, one right side plate member 7, and one left side plate member 8. The metal plate (in this case, a zinc iron plate or the like is used) is combined. The duct body 2 is formed in a hollow rectangular cross section from the four metal plates. The upper plate member 5 and the lower plate member 6 have the same configuration, and are used in an upside down posture. The right side plate member 7 and the left side plate member 8 have the same configuration, and are used in a posture in which they are horizontally reversed. The upper plate member 5 and the lower plate member 6 are arranged to face each other while being separated in the vertical direction. The side plate member 7 on the right side and the side plate member 8 on the left side are arranged to face each other while being separated in the left-right direction.

The upper plate member 5, the lower plate member 6, the right side plate member 7, and the left side plate member 8 are each formed with a flange portion 3 A (a part of the frame-like flange 3) by bending the end portions in the longitudinal direction. Has been. That is, the upper plate member 5 is integrally configured from a flat upper plate portion 9 and the flange portion 3A. The lower plate member 6 is configured integrally with a flat plate-like lower plate portion 10 and a flange portion 3A. The right side plate member 7 is integrally formed of a flat plate-like right side plate portion 11 and a flange portion 3A. The left side plate member 8 is integrally constituted by a flat plate-like left side plate portion 12 and a flange portion 3A.

In the upper plate member 5, the flange portion 3 A is formed by bending each end portion in the longitudinal direction of the upper plate portion 9 outward from the upper plate portion 9 in a right angle direction. In the lower plate member 6, the flange portion 3 A is formed by bending each longitudinal end portion of the lower plate portion 10 outward from the lower plate portion 10 in a right angle direction. In the right side plate member 7, the flange portion 3 A is formed by bending each longitudinal end portion of the right side plate portion 11 outward from the right side plate portion 11 in a right angle direction. In the left side plate member 8, the flange portion 3 A is formed by bending each longitudinal end portion of the left side plate portion 12 outward from the left side plate portion 12 in a right angle direction.

A corner portion that is a continuous portion of the upper plate portion 9 and the flange portion 3A, a corner portion that is a continuous portion of the lower plate portion 10 and the flange portion 3A, a corner portion that is a continuous portion of the right plate portion 11 and the flange portion 3A, and the left side Reinforcing means 13 having the same configuration is provided at each corner that is a continuous portion of the plate portion 12 and the flange portion 3A. Since these reinforcing means 13 have the same configuration, the reinforcing means 13 of the lower plate member 6 will be described with reference to FIGS. 3 and 4 and FIGS. Let it be an explanation.

As shown in FIGS. 3 and 4, the reinforcing means 13 is formed by bending a single plate member constituting the lower plate member 6. That is, the reinforcing means 13 is composed of a bent piece formed by folding the lower plate member 6 twice (folded at two locations). 6 to 10 are manufacturing process diagrams of the reinforcing means 13, and the configuration of the reinforcing means 13 of the lower plate member 6 will be described based on these drawings for convenience.

In the first step, as shown in FIG. 6, the flat plate-shaped blank member 14 for the lower plate member is centered on a predetermined position A that is near the boundary between the portion that becomes the lower plate portion 10 and the portion that becomes the flange portion 3A. As shown in FIG. One side with respect to the predetermined position A is referred to as a lower plate portion forming material 15, and the other side is referred to as a flange forming material 16. When the first step is completed, subsequently, in the second step, as shown in FIG. 7, the lower portion from the predetermined position B where the partial region 17 of a predetermined length is placed on the lower plate portion forming material 15 from the predetermined position A is lowered. The plate portion forming material 15 is bent at a right angle so as to be parallel to the flange forming material 16.

Subsequently, in the third step, as shown in FIG. 8, the partial region 17 is bent so as to overlap the flange forming material 16, and the lower plate portion forming material 15 is bent parallel to the flange forming material 16. It is done. Then, a three-layer overlapping portion 20 in which a partial region 18 of the flange forming material 16 and a partial region 19 of the lower plate portion forming material 15 are overlapped with a partial region 17 (corresponding to a plate portion) interposed therebetween. It is formed. Subsequently, in the fourth step, as shown in FIG. 9, a predetermined portion of the flange forming material 16 is offset. Thereby, the surface of the flange forming material 16 (corresponding to the connection surface of the flange 3A) and the surface of the lower plate portion forming material 15 (corresponding to the surface of the bent piece on the flange side) are flush with each other. That is, a stepped portion indicated by reference numeral 16 a is formed on the flange forming material 16. The position where the stepped portion 16a is formed is a position substantially coincident with the predetermined position B.

Further, in the fifth step, as shown in FIG. 10, the lower plate portion forming material 15 and the flange forming material 16 are bent at a right angle in the middle portion C of the overlapping portion 20. By doing so, the reinforcing means 13 is formed. That is, the reinforcing means 13 includes an overlapping portion 20 formed by overlapping three bent pieces (a partial region 18 of the flange forming material 16, a partial region 17, and a partial region 19 of the lower plate portion forming material 15). In the middle portion C, the lower plate portion forming material 15 (corresponding to the first plate material portion) and the flange forming material 16 (corresponding to the second plate material portion) are bent at a right angle. By doing so, the reinforcing means 13 is formed across the lower plate portion forming material 15 and the flange forming material 16.

Furthermore, the front end portion 21 of the flange forming material 16 is bent at a right angle toward the outside. The clamping piece 22 is formed by folding the tip of the tip 21. The reinforcing means 13 (overlapping part 20) is formed over the entire longitudinal direction (left-right direction) of the corner part. Reference numeral 23 denotes a connection member stopper formed on the lower plate portion forming material 15 apart from the corner portion. This connecting member stopper 23 is formed in a groove shape and is formed over the entire longitudinal direction (left-right direction) of the corner.

The reinforcing means 13, the connecting member stopper 23, and the flange portion 3A are formed on the upper plate member 5, the lower plate member 6, the right side plate member 7, and the left side plate member 8, respectively. In addition, in this case, the flange portion 3A is formed on both side portions in the longitudinal direction (front-rear direction) of each plate member.

When the flange 3 (flange portion 3A) is viewed from the front, a single slit-like portion 24 (see, for example, FIGS. 2 and 3) is formed. The slit-shaped portion 24 is formed by offsetting the flange forming material 16 so that the flange forming material 16 and the lower plate portion forming material 15 are flush with each other.

The upper plate member 5, the lower plate member 6, the right side plate member 7, and the left side plate member 8 each have the reinforcing means 13 and the flange portion 3A having the above-described configuration. An assembly means 25 (see FIG. 5) for assembling the upper plate member 5, the lower plate member 6, the right side plate member 7, and the left side plate member 8 is provided. The assembling means 25 assembles the upper plate member 5, the right side plate member 7 and the left side plate member 8, and assembles the lower plate member 6, the right side plate member 7 and the left side plate member 8. Is configured to be possible.

As the assembling means 25, as shown in the enlarged portion of FIG. 5, a “hull structure” having a general configuration configured by fitting the double portion 26 and the single portion 27 is preferably used. Used. In this embodiment, double portions 26 are formed at the ends of the right side plate member 7 and the left side plate member 8. A single portion 27 that fits into the double portion 26 is formed at the end portions of the upper plate member 5 and the lower plate member 6.

As shown in FIG. 2, the connection member 4 has a plate-like sandwiched piece 4 a on one side and a plate-like sandwiched piece 4 a on the other side in order to pass between the flange portions 3 A adjacent in the orthogonal direction. Are orthogonal to each other. The plate-shaped sandwiched piece 4a on one side and the plate-shaped sandwiched piece 4a on the other side are formed to have the same length.

As shown in FIG. 11, each sandwiched piece 4a of the connecting member 4 is provided on both sides of the main body 4b and the main body 4b along the flange 3A, and away from the flange 3A. In addition,

bent portions

4c and 4d that are bent in a direction orthogonal to the flange portion 3A are provided. One bent portion 4 c is on the reinforcing means 13 side and overlaps with a partial region 18 of the flange forming material 16. The other bent portion 4 d is overlapped with the distal end portion 21 of the flange forming material 16. The other bent portion 4 d is held by the flange portion 3 A so as to be held by further bending the holding piece 22 of the distal end portion 21 of the flange forming material 16. One bent portion 4c is prevented from being detached from the flange portion 3A by being locked to the connecting member stopper 23.

The duct 1 having the above-described configuration includes reinforcing means 13. The reinforcing means 13 is formed by bending an overlapping portion 20 formed by bending a single plate member at a midway portion C at a predetermined angle (for example, a right angle). With this configuration, in the overlapping portion 20, the first plate material portion extends over the second plate material portion, and the second plate material portion extends over the first plate material portion. Therefore, an increase in the amount of material used can be suppressed as compared with a configuration in which the entire flange portion 3A has a double structure. Moreover, in order to provide the reinforcement means 13, it is not necessary to comprise a 1st board | plate material part and a 2nd board | plate material part with another board member. Therefore, there is no need to connect separate plate members. For this reason, the increase in manufacturing cost accompanying the increase in the number of man-hours is suppressed, and the duct 1 is provided with the required strength.

In this type of duct 1, the flange 3 is used as a joint portion connected to another duct (not shown). For this reason, the flange 3 is a part which requires especially strength. Therefore, improving the strength of such a flange 3 portion is useful in this type of duct 1.

Further, in the duct 1 of this embodiment, the reinforcing surface 13 is provided and the connection surface 3b of the flange 3 is formed in a flat surface. As shown in the fourth step, this configuration is realized by performing processing for offsetting the flange forming material 16 on the plate member so that the flange forming material 16 and the lower plate portion forming material 15 are flush with each other. . By comprising in this way, the connection surface 3b of the flange 3 becomes a flat surface. Therefore, when the flange 3 of another duct is connected and assembled to the flange 3 of the duct 1 of this embodiment, the connection surfaces of both flanges are closely connected.

Moreover, the stepped portion 16 a is formed by offsetting the flange forming material 16. That is, the cross-sectional shape of the flange forming member 16 is changed. As a result, the strength is improved by changing the cross-sectional shape. In the duct 1 of this embodiment, sufficient strength can be secured by forming the reinforcing means 13 and the stepped portion 16a. Therefore, the thickness of the duct forming material can be reduced by that amount. Then, by reducing the thickness of the duct forming material, the manufacturing cost can be further suppressed.

By the way, the reinforcing means 13 is configured by bending an overlapping portion 20 formed by bending a single plate member so that an intermediate portion C has a predetermined angle. For this reason, each to-be-clamped piece 4a of the member 4 for a connection becomes a form which floats from the back surface of 3 A of flange parts. However, according to the reinforcing means 13 according to this embodiment, the thickness of the plate member can be reduced by the amount of reinforcement. For this reason, the floating amount from the back surface of the flange portion 3A of the sandwiched piece 4a is minimized.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention. For example, the reinforcing means is not limited to the above embodiment. FIG. 12 shows another embodiment of the reinforcing means 13. In the embodiment shown in FIG. 12, the second plate member portion is offset so that the connection surface 3 b of the flange 3 connected to the flange of another duct is a flat surface. Therefore, the single slit-like portion 24 is formed in the first plate portion (for example, the lower plate portion forming material 15). Since other configurations are the same as those of the duct 1 of the above-described embodiment, portions having the same function are denoted by the same reference numerals and description thereof is omitted.

The reinforcing means 13 in each of the above embodiments was formed so as to extend over the flange portion 3A and the corner portion of the plate surface portion continuous therewith. However, the present invention is not limited to this, and the reinforcing means 13 can be used in place of the assembling means 25 shown in the above embodiment. In this way, for example, the lower plate portion 10 and the right plate portion 11 or the lower plate portion 10 and the left plate portion 11 can be integrally formed.

The reinforcing means 13 is not limited to the case where the reinforcing means 13 is provided at the corner of the duct 1 but can be provided at the corner of a shelf receiving member (a long shelf receiving member having an L-shaped cross section) that requires reinforcement.

DESCRIPTION OF SYMBOLS 1 Duct 2 Duct main body 3 Flange

3A Flange part

3b Connection surface 13 Reinforcement means 14 Blank material for lower board members 17

Partial area

18, 19 Partial area 24 Slit-like part 25 Assembly means

Claims

By folding a single plate material approximately 180 degrees at two bent portions, a first plate portion, a plate portion between the two bent portions, and a second plate portion are formed in that order. A three-layer overlapping portion is formed by sandwiching the plate portion between the two bent portions between the end portion of the first plate portion and the end portion of the second plate portion, and a substantially intermediate portion of the overlap portion. A corner portion is formed by bending the wire at a substantially right angle.
By folding a single plate material approximately 180 degrees at two bent portions, a first plate portion, a plate portion between the two bent portions, and a second plate portion are formed in that order. A three-layer overlapping portion is formed by sandwiching the plate portion between the two bent portions between the end portion of the first plate portion and the end portion of the second plate portion, and a substantially intermediate portion of the overlap portion. A corner formed by being bent at a substantially right angle;
Of the first plate member portion and the second plate member portion, one plate member portion located on the front side of the overlapping portion, and among the first plate member portion and the second plate member portion, located inside the overlapping portion. A stepped portion formed by bending by offsetting the portion of the other plate material portion, which is off the overlap portion, so that the portion of the other plate material portion is off the overlap portion, and
A duct body composed of a portion of the one plate material portion that is deviated from the overlapping portion;
A flange connected to the flange of the other duct, which is composed of a portion of the other plate material portion that is off the overlapping portion,
A duct comprising a side surface made of