JP4862097B1 - duct - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a duct capable of suppressing an increase in manufacturing cost while ensuring necessary strength.
SOLUTION: A plate member is folded at approximately 180 degrees at two bent portions so that a plate member portion between the two bent portions is divided into a plate member portion on one end side and a plate member portion on the other end side. A duct having a configuration in which a three-layer overlapped portion formed by being sandwiched is bent at a substantially middle portion at a substantially right angle to form a corner portion.
[Selection] Figure 4

Description

  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. In this duct, when the flange portion (co-plate flange) is formed from the duct component plate, a part of the duct component plate is bent at a right angle. However, it is difficult to ensure the required strength simply by bending a part of the duct component plate at a right angle.

  Therefore, for example, a technique shown in Patent Document 2 can be considered. In this duct, reinforcing means is provided at the flange portion. That is, the reinforcing means includes a rear flange portion that continuously faces the front flange portion, and a pressing piece that is bent back to the front flange portion and closely contacts the rear wall surface of the front flange portion. The strength is improved.

  Furthermore, the technique shown in Patent Document 3 has been proposed. This is because a short side portion of a duct component plate is bent at a corner of a hollow duct having a rectangular cross section to form a folded portion (double) on the insertion side, and one short portion of another duct component plate is formed. A side portion is bent to form a bent portion (single) on the insertion side, a bent portion is inserted into the folded portion, and an extended portion of the folded portion is overlaid on the other duct component plate. It is configured by bending. According to such a structure of the folded portion, the strength of the corner portion of the hollow duct is improved and it is possible to counter external force.

JP 2007-298234 A JP 7-91723 A JP 2002-168504 A

  However, in the duct disclosed in Patent Document 2, the reinforcing means includes a rear flange portion that continuously faces the front flange portion, and further bends back to the front flange portion and is applied to the rear wall surface of the front flange portion. Since it is the structure provided with the press piece which closely_contact | adheres, many materials are required, Therefore Material cost becomes high. Further, in the duct disclosed in Patent Document 3, a reinforcing portion is formed, a folded portion is formed in one member (one duct component plate), and a bent portion is formed in another member (other duct component plate). Since the bent portion is inserted into the folded portion, the man-hour is increased and the manufacturing cost is increased.

  Then, in view of the said subject, this invention aims at provision of the duct which can ensure required intensity | strength, after suppressing the raise of manufacturing cost.

  In the duct according to the present invention, one plate member is folded back approximately 180 degrees at two bent portions, so that a plate member portion between the two bent portions is a plate member portion on one end side and a plate member portion on the other end side. A three-layer overlap portion formed by sandwiching between the two is bent at a substantially right angle at a substantially middle portion to form a corner portion.

  As in the above configuration, the overlapping portion of the three sheets formed by folding the plate material is bent at a substantially right angle at a substantially middle portion thereof to form a corner portion, resulting in a rise in material costs and an increase in overall manufacturing costs. And the necessary strength is ensured.

  According to the duct of the present invention, it is possible to secure the necessary strength while suppressing an increase in manufacturing cost.

It is a perspective view showing the single-piece | unit structure of the duct of embodiment of this invention. It is the same exploded perspective view. FIG. 2 is a longitudinal perspective view of the duct of FIG. 1 cut at the center in the width direction (left-right direction). It is sectional drawing which mainly represented the reinforcement means. FIG. 2 is a transverse perspective view of the duct of FIG. 1 cut at the center in the longitudinal direction (front-rear direction). It is a side view showing the manufacture first process of the reinforcement means. It is a side view showing the manufacture 2nd process of the reinforcement means. It is a side view showing the manufacture 3rd process of the reinforcement means. It is a side view showing the manufacture 4th process of the reinforcement means. It is a side view showing the manufacture 5th process of the reinforcement means. It is a side view which shows the detail of the relationship between the flange part and a connection member. It is a side view showing the reinforcement means in the duct of another embodiment.

  Hereinafter, a 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 longitudinal ends 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 formed into a hollow rectangular cross section. The upper plate member 5 and the lower plate member 6 have the same configuration and are used symmetrically, and the right side plate member 7 and the left side plate member 8 have the same configuration and are used symmetrically. The upper plate member 5 and the lower plate member 6 are arranged so as to face each other while being separated in the vertical direction, and the right side plate member 7 and the left side plate member 8 are arranged so as 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 </ b> 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 configured integrally with the flat plate-shaped upper plate portion 9 and the flange portion 3A, and the lower plate member 6 is configured integrally with the flat plate-shaped lower plate portion 10 and the flange portion 3A. The right side plate member 7 is integrally formed of a flat plate right side plate portion 11 and a flange portion 3A, and the left side plate member 8 is integrally formed of a flat plate left side plate portion 12 and a flange portion 3A. It is configured.

  In the relationship between the upper plate portion 9 and the flange portion 3 </ b> A, the flange portion 3 </ b> A is formed by bending each longitudinal end portion of the upper plate portion 9 outward from the upper plate portion 9 in a right angle direction. In the relationship between the lower plate portion 10 and the flange portion 3A, the flange portion 3A 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 relationship between the right side plate portion 11 and the flange portion 3A, the flange portion 3A 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 relationship between the left side plate portion 12 and the flange portion 3A, the flange portion 3A 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, referring to FIGS. 3, 4, and 6 to 10, here, the description of the reinforcing means 13 of the lower plate member 6 will explain the configuration of the other reinforcing means 13. This is a substitute explanation.

  As shown in FIG. 3 and FIG. 4, the reinforcing means 13 is formed by bending one plate member constituting the lower plate member 6, and from a bent piece formed by folding the lower plate member 6 twice. It is configured. Here, for convenience, the configuration of the reinforcing means 13 of the lower plate member 6 will be described as a representative, including manufacturing process diagrams of the reinforcing means 13 shown in FIGS.

  As shown in the first step of FIG. 6, the flat 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. Bend it to make a right angle. 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, then, as shown in the second step of FIG. 7, the lower plate 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. The part forming member 15 is bent at a right angle so as to be parallel to the flange forming member 16.

  Subsequently, as shown in the third step of 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. Then, three bent pieces (that is, a partial region of the flange forming material 16) in which the partial region 18 of the flange forming material 16 and the partial region 19 of the lower plate portion forming material 15 overlap with each other through the partial region 17. 18, an overlapping portion 20 is formed by overlapping the partial region 17 and the partial region 19) of the lower plate portion forming material 15. Subsequently, as shown in the fourth step of FIG. 9, the surface of the flange forming material 16 (corresponding to the connection surface of the flange 3A) and the surface of the lower plate forming material 15 (corresponding to the surface of the bent piece on the flange side) In order to make the same, the predetermined portion of the flange forming material 16 is submerged. That is, a stepped portion indicated by reference numeral 16 a is formed in 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, as shown in the fifth step of FIG. 10, the lower plate portion forming member 15 and the flange forming member 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 is in the middle of the 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). The lower plate portion forming material 15 is bent by bending the portion C so that the lower plate portion forming material 15 (corresponding to one plate surface portion) and the flange forming material 16 (corresponding to the other plate surface portion) are at right angles. And the flange forming material 16.

  Furthermore, the front end portion 21 of the flange forming member 16 is bent at a right angle toward the outside, and the front end side portion of the front end portion 21 is folded back to form the holding piece 22. 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 stop formed on the lower plate portion forming material 15 apart from the corner portion. This connecting member stop 23 is formed in a groove shape and is formed over the entire longitudinal direction (left-right direction) of the corner.

  Such reinforcing means 13, connecting member stopper 23, and flange portion 3 </ b> A are formed for each of the upper plate member 5, the lower plate member 6, the right side plate member 7, and the left side plate member 8. 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 is formed by sinking 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. (See, for example, FIGS. 2 and 3).

  As described above, the assembling means 25 (the assembling means 25 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 having the reinforcing means 13 and the flange portion 3A having the same configuration. FIG. 5) 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. It is configured to be able to.

  As shown in the enlarged portion of FIG. 5, the assembly means 25 preferably has a helical structure having a general configuration configured by fitting the double portion 26 and the single portion 27 together. . In this case, double portions 26 are formed at the ends of the right side plate member 7 and the left side plate member 8, and the double portions 26 are fitted to the end portions of the upper plate member 5 and the lower plate member 6. A single portion 27 is formed.

  As shown in FIG. 2, the connecting 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 so as to be passed between adjacent flange portions 3 </ b> A in the orthogonal direction. Is formed in a bowl shape in the orthogonal direction. 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 4 a of the connection member 4 includes a main body portion 4 b disposed along the flange portion 3 </ b> A, and a flange portion on both sides of the main body portion 4 b in a direction away from the flange portion 3 </ b> A. And bent portions 4c and 4d that are bent in a direction orthogonal to 3A. 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, and the other bent portion 4 d overlaps with the distal end portion 21 of the flange forming material 16. The other bent portion 4d is held by the flange portion 3A so as to be embraced by further bending the holding piece 22 of the distal end portion 21 of the flange forming material 16, and the one bent portion 4c is connected to the connecting member stopper 23. Is prevented from being detached from the flange portion 3A.

  The duct 1 having the above-described configuration includes the reinforcing means 13, and the reinforcing means 13 includes an overlapping portion 20 formed by bending one plate member, and one plate surface portion and another plate surface portion at an intermediate portion C thereof. Are folded so as to be at a predetermined angle (for example, a right angle), so that one plate surface portion and the other plate surface portion are spanned. Accordingly, it is possible to suppress the increase in the amount of material used as compared with a configuration in which the entire flange portion 3A has a double structure. Further, in order to provide the reinforcing means 13, it is not necessary to configure one plate surface portion and the other plate surface portion with different plate members, and therefore it is not necessary to connect the other plate members. For this reason, an increase in manufacturing cost accompanying an increase in the number of man-hours can be suppressed, and the necessary strength can be ensured.

  In particular, in the duct 1 of this type, the flange 3 is used as a joint portion connected to other ducts (not shown), and thus is a portion requiring particularly strength. Therefore, it is useful in this type of duct 1 to improve the strength of the flange 3 portion.

  Further, after the reinforcing means 13 as described above is formed, the connection surface 3b of the flange 3 is made flat. As shown in the fourth step, this is realized, for example, by processing the plate member so as to sink the flange forming material 16 in order to make the flange forming material 16 and the lower plate portion forming material 15 flush with each other. . By comprising in this way, the connection surface 3b of the flange 3 becomes a flat surface, and when connecting another duct by connecting the flanges, the connection surfaces of the flanges can be closely connected.

  In addition, the stepped portion 16a is formed by sinking the flange forming material 16, and the cross-sectional shape is changed. Therefore, the strength is improved by changing the cross-sectional shape. Since the reinforcing means 13 and the stepped portion 16a are formed, sufficient strength can be ensured. Therefore, the thickness of the duct forming material can be reduced correspondingly, and the thickness of the duct forming material can be reduced. According to this, the manufacturing cost can be further suppressed.

  By the way, the reinforcing means 13 is formed by bending an overlapping portion 20 formed by bending one plate member so that one plate surface portion and another plate surface portion are bent at a predetermined angle at an intermediate portion C thereof. ing. 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 doing so, the floating amount from the back surface of the flange portion 3A of the sandwiched piece 4a can be minimized. .

  The duct according to the present invention includes a duct body in which one plate surface portion and another plate surface portion that is continuous with the one plate surface portion via a corner portion are provided with reinforcing means at the corner portion. The plate surface portion and the reinforcing means are formed by bending a single plate member, and the reinforcing means is composed of a plurality of bent pieces formed by folding the plate member, and the bent piece is a single plate surface portion. And other plate surface portions.

  According to this configuration, the reinforcing means is formed from a plurality of bent pieces formed by folding back the plate member, and the bent pieces are formed so as to cover one plate surface portion and the other plate surface portion. The rise in material costs can be suppressed, and the overall production cost can be suppressed.

  Moreover, the bending piece is formed along the longitudinal direction of the corner. As in this configuration, the bent piece is formed along the longitudinal direction of the corner portion, whereby reinforcement over the entire longitudinal direction of the duct is possible.

  One plate surface portion is a duct main body, and the other plate surface portion is a flange formed at the end portion in the longitudinal direction of the duct main body and connected to a flange of another duct. According to this configuration, it is possible to prevent deformation of the flange that is used for connection with the flange of another duct and is easily subjected to a large external force.

  Furthermore, the structure which the step part which makes the surface of the bending piece by the side of a flange and the connection surface of a flange flush is formed by sinking the predetermined position near the duct main body in a flange is employ | adopted. By forming the stepped portion by sinking the predetermined position of the flange, the cross-sectional shape of the portion changes, so that the strength can be improved accordingly.

  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, one plate surface portion is sunk in order to make the connecting surface 3 b of the flange 3 connected to another duct through the flange 3 a flat surface. Therefore, the single slit-like portion 24 is seen by one plate surface portion (for example, the lower plate portion forming material 15). Since other configurations are the same as those in the above embodiment, portions having the same function are denoted by the same reference numerals and description thereof is omitted.

  In addition, the reinforcement means 13 in each said embodiment was formed covering the corner | angular part of 3 A of flange parts and the plate | board surface part continuous with this. However, the present invention is not limited to this, and one plate surface portion and another plate surface portion can be integrally formed by being used in place of the assembling means 25 shown in the above embodiment.

  Further, the reinforcing means 13 is not limited to being provided at the corner portion of the duct 1 and is provided at the corner portion of a shelf receiving member (for example, a long shelf receiving member having an L-shaped cross section) that requires reinforcement. It is also possible.

  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 | region, 18, 19 ... Partial area | region, 24 ... slit-like part, 25 ... assembling means

Claims (1)

  A plate material portion between the two bent portions is sandwiched between a plate material portion on one end side and a plate material portion on the other end side by folding a single plate material at approximately 180 degrees at two bent portions. A duct characterized in that a three-layer overlapping portion is bent at a substantially right angle at a substantially middle portion thereof to form a corner portion.

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