JP2012101502A - Method for manufacturing duct body of wiring duct and duct body manufacturing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow one mold to accommodate a plurality of molds to be used in bending processing for forming a plate-like resin plate into a roughly conduit shape.SOLUTION: An apparatus for manufacturing a duct body includes a bending processing part 600A for bend-forming a corresponding part of a side face part 120 of a duct body 100 of a flat resin plate 500, and the bending processing part 600A includes; a holding stage 610A for holding a corresponding part of the side face part 120 of the flat resin plate 500 heated; a male mold 620A provided on the upper side of the holding stage 610A; and a female mold 630A provided on the lower side of the holding stage 610A. The holding stage 210A holds the corresponding part of the side face part 120. The female mold 630A is arranged approximately in a conduit shape by combining a pair of female side movable molds 631A changeable into a width dimension corresponding to the width dimension of the outer side of the duct body 100. The male mold 620A is constituted by combining a pair of male side movable molds 621A changeable into the width dimension corresponding to the inner side width dimension of the side face part 120. The duct body 100 is formed by pushing the flat resin plate 500 from the upper side into the lower side female mold 630A by the male mold 620A.

Description

  The present invention relates to a manufacturing method and a manufacturing apparatus for a duct body that constitutes a wiring duct that houses a large number of wirings in a switchboard, for example.

As shown in FIG. 8, the most common wiring duct includes a deep substantially bowl-shaped duct body 100 and a duct cover 200 attached to the duct body 100.
The duct body 100 is formed by integrally forming a bottom surface portion 110 that is in close contact with a wall or the like and a pair of side surface portions 120 that stand up from the bottom surface portion 110 and face each other. A plurality of screw holes (not shown) for screws for attaching the duct body 100 to a wall or the like are formed in the bottom surface portion 110 at regular intervals. In addition, the side surface portion 120 is provided with openings 121 at regular intervals for leading the stored wiring to the outside. A main body side fitting portion 122 for attaching the duct cover 200 is formed at the upper end portion of the side surface portion 120.
The duct body 100 is made of synthetic resin or metal.

  On the other hand, the duct cover 200 is formed in a shallow substantially bowl shape, and a cover side fitting portion 210 that fits into the main body side fitting portion 122 of the duct main body 100 is formed.

  Since the duct main body 100 is formed by extrusion, the opening portion 121 of the bottom surface portion 110 and the side surface portion 120 is opened from the outside in a state where the die 300 is inserted into the duct main body 100 as shown in FIG. It is opened by pressing the punch 400. Note that the die 300 has a substantially T-shape in a side view when a base portion 310 and a die portion 320 formed so as to fit the inner shape of the duct body 100 are combined.

  The die 300 thus configured is inserted into the duct body 100, and the punch 400 is pressed from the outside to open the opening 121. Here, the punched piece punched out from the opening 121 is discharged to the outside through a punching hole 330 penetrating from the die part 320 of the die 300 to the base part 310.

As shown in FIG. 8 (A) and FIG. 9 (A), it is sufficient if the dimension between the side portions 120 is large, that is, wide, but in FIG. 8 (B) and FIG. 9 (B). As shown, when the dimension between the side surface parts 120 is small, that is, narrow, the width dimension of the die part 320 of the die 300 becomes narrow, and thus it may be difficult to secure the punch hole 330. Even if the punched hole 330 can be secured, the punched piece 330 may be clogged with the punched piece.
Moreover, since the width dimension of the die part 320 must be formed narrowly, the die part 320 may be damaged from the root if it is used repeatedly.

  Further, since it is necessary to drive the two punches 400 so as to oppose each other, the driving mechanism is complicated.

In addition, since the amount of electric wire that can be drawn out from one opening 121 is determined by the size of the opening 121, when the electric wire that exceeds the amount needs to be drawn out from one place, the amount of the electric wire that is to be drawn out is one. If only the nearest opening 121 is not in time, there will be a situation where it must be pulled out from other adjacent openings 121.
Such a situation is undesirable from the viewpoint of the routing of the electric wire.

In order to solve such a situation, the applicant has created a duct body of a wiring duct and a method for manufacturing the same as disclosed in Japanese Patent Application Laid-Open No. 2008-312388 (Patent Document 1).
The duct body of this wiring duct is “in the duct body of the wiring duct that is formed in a substantially bowl shape and the duct cover is attached, and a plurality of openings are formed in a portion corresponding to the side surface portion of the duct body in the flat resin plate. Thereafter, the portion corresponding to the side surface portion is bent ”, and the manufacturing method thereof is“ in the manufacturing method of the duct main body of the wiring duct that is formed in a substantially bowl shape and the duct cover is attached. A step of forming a plurality of openings in a portion corresponding to the side surface portion of the duct body in the sheet-shaped resin plate, and a step of forming a duct body by bending the flat resin plate after forming the openings. It was a thing.

  In Japanese Patent Application Laid-Open No. 2008-31388, a general method is used without particularly mentioning means for forming a flat resin plate in a substantially bowl shape. This general method is to use a female mold having an outer width dimension of a duct body to be manufactured and a male mold having an inner width dimension of the duct body to be manufactured, and a flat resin plate using a male mold. This is done by pushing into a female mold.

JP 2008-31388 A

  However, since some wiring ducts have various width dimensions, molds (male and female molds) used for bending to form a flat resin plate in a substantially bowl shape also correspond to the width dimensions. It was necessary to prepare multiple types.

  The present invention was devised in view of the above circumstances, and it is not necessary to prepare a plurality of types of molds used for bending to form a flat resin plate in a substantially bowl shape. An object of the present invention is to provide a duct body manufacturing method and a duct body manufacturing apparatus capable of being used.

  A method for manufacturing a duct main body of a wiring duct according to the present invention is a method for manufacturing a duct main body of a wiring duct formed in a substantially bowl shape, and bending a flat resin plate into a duct main body The bending step is provided on the upper side of the holding stage for holding a portion corresponding to the side surface portion of the duct body of the flat resin plate heated so as to be bent. It is performed in a bending portion having a male mold and a female mold provided on the lower side of the holding stage, the holding stage holds a portion corresponding to a side surface portion of a duct body of a flat resin plate, The female mold is formed in a substantially bowl shape by combining a pair of female movable molds whose width dimension can be changed to correspond to the outer width dimension of the duct body to be manufactured. Inner width dimension of the side of the duct body to be manufactured A pair of male movable molds whose width dimensions can be changed to meet the requirements are combined, and the male mold presses the flat resin plate from the upper side and pushes it into the lower female mold to form the duct body To do.

  Also, a method for manufacturing a duct main body of another wiring duct according to the present invention is a method for manufacturing a duct main body of a wiring duct formed in a substantially bowl shape, and a duct-shaped resin plate is bent to process a duct main body. The bending process includes a male mold having a width corresponding to the inner width of the duct body to be manufactured, and a flat resin plate heated so as to be bent. And a bending portion having a bending stage having a pair of wing dies that are folded to fold a portion corresponding to the side portion of the duct body, and the wing dies have a flat resin plate. The duct body is formed by rotating from the held state toward the male mold and sandwiching a portion corresponding to the side surface by the wing mold and the male mold.

  Furthermore, the duct body manufacturing apparatus according to the present invention is a duct body manufacturing apparatus that manufactures a duct body of a wiring duct formed in a substantially bowl shape, and includes a portion corresponding to a side surface portion of a duct body of a flat resin plate. A folding processing section for forming the bending, the folding processing section is a holding stage for holding a portion corresponding to the side surface portion of the duct body of the flat resin plate heated so as to be bent; It has a male mold provided on the upper side of the holding stage and a female mold provided on the lower side of the holding stage, and the holding stage holds a portion corresponding to the side surface portion of the duct body of the flat resin plate. The female mold is arranged in a substantially bowl shape by combining a pair of female movable molds that can be changed to a width dimension corresponding to the outer width dimension of the duct body to be manufactured. Of the side of the duct body to be manufactured It is configured by combining a pair of male movable molds that can be changed to the width dimension corresponding to the side width dimension, and the male mold presses the flat resin plate from the upper side and pushes it into the lower female mold Form the duct body.

  Furthermore, another duct body manufacturing apparatus according to the present invention is a duct body manufacturing apparatus that manufactures a duct body of a wiring duct formed in a substantially bowl shape, and corresponds to a side surface portion of a duct body of a flat resin plate. It comprises a bending part that bends a part, and the bending part is combined with a pair of male movable molds that can be changed to a width corresponding to the inner width of the duct body to be manufactured. And a bending stage having a pair of wing molds that hold the flat resin plate that is heated so as to be bent and bend the portion corresponding to the side surface of the duct body. The wing mold can be changed to a width dimension corresponding to the outer width dimension of the duct body to be manufactured, and the wing mold holds the flat resin plate from the state where the wing mold is held. Rotate towards the mold Portions corresponding to the side surface portion by the wing mold and the male mold to form a duct body by being clamped.

The duct main body manufacturing apparatus and manufacturing method according to the present invention can change the width dimension of a pair of male male movable molds and a pair of female female movable molds. Duct bodies of wiring ducts of various width dimensions can be manufactured.
Therefore, the cost can be significantly reduced as compared with the conventional one in which a plurality of types of molds corresponding to various width dimensions are prepared. Moreover, since a space for storing unused molds is not necessary, the cost can be reduced in this respect.
Also, by changing the width dimensions of the male pair of male movable molds and the female pair of female movable molds, duct bodies with various width dimensions can be manufactured. Therefore, it is possible to cope with more rapid multi-product production.

It is a schematic explanatory drawing which shows the manufacturing process of the duct main body by the duct main body manufacturing apparatus which concerns on the 1st Embodiment of this invention. It is a schematic explanatory drawing which shows the manufacturing process of the duct main body by the duct main body manufacturing apparatus which concerns on the 2nd Embodiment of this invention. It is a schematic explanatory drawing which shows the manufacturing process of the duct main body by the duct main body manufacturing apparatus which concerns on the 3rd Embodiment of this invention. It is a schematic perspective view of the duct main body manufactured by the duct main body manufacturing apparatus which concerns on embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is drawing of the flat resin board used as a duct main body by the duct main body manufacturing apparatus which concerns on embodiment of this invention, Comprising: The same figure (A) is a schematic plan view, The same figure (B) is a schematic side view. . It is a schematic explanatory drawing at the time of opening an opening part in the flat resin plate used as a duct main body by the main body manufacturing apparatus which concerns on embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is drawing which shows the state which opened the opening part in the flat resin plate used as a duct main body by the main body manufacturing apparatus which concerns on embodiment of this invention, Comprising: The same figure (A) is a schematic plan view, the same figure (B). Is a schematic side view. It is a schematic explanatory drawing of this kind of conventional wiring duct. It is a schematic explanatory drawing at the time of opening the opening part of this kind of conventional wiring duct.

First, a duct main body 100 of a wiring duct to be manufactured by a duct main body manufacturing apparatus according to first, second and third embodiments of the present invention will be described with reference to FIGS.
The duct body 100 of the wiring duct is formed in a substantially bowl shape having a substantially concave shape when viewed from the side, and is a duct body of the wiring duct to which a duct cover (not shown) is attached. The opening 121 is formed by alternately combining upright triangular first openings 121A and inverted triangular second openings 121B.

The manufacturing process of the duct main body 100 is roughly classified into three.
First, the step of forming the flat resin plate 500, the step of opening the opening 121 in the flat resin plate 500, and the flat resin plate 500 having the opening 121 formed in a substantially bowl shape. It is a process to do.
The duct main body manufacturing apparatus according to the first, second, and third embodiments of the present invention is used for the last folding step among these three steps.
Below, the process of forming the flat resin plate 500 which is the pre-process of the bending process by the duct main body manufacturing apparatus according to the first, second and third embodiments of the present invention, and the flat resin plate 500 are opened. The process of opening the part 121 will be described.

First, the manufacture of the duct body 100 starts from forming a flat resin plate 500 as shown in FIG. 5 by extruding a synthetic resin such as polyvinyl chloride.
At the time of this extrusion molding, an uneven groove serving as the main body side fitting portion 122 for fitting the duct cover to the long side is formed.

  Next, the flat resin plate 500 formed in this way is placed on a flat die 300 as shown in FIG. 6, and an opening 121 or the like is formed by the punch 400. As the opening, the first opening 121A and the second opening 121B that are opened at the portion that should be the side surface portion 120 of the duct body 100, and the third opening that is opened at the portion that should be the bottom surface portion 110. There is a part 111A (screw hole).

What is to be opened on the side surface portion 120 is to lead the wiring to the outside when used as a wiring duct, and includes a first opening 121 </ b> A having an upright triangle shape and a second having an inverted triangular shape. And an opening 121B.
The first opening 121A and the second opening 121B are isosceles triangles in FIG. 4 and the like, but are not limited to isosceles triangles, and are equilateral triangles, squares, rectangles, or circles. Other shapes may be used.

  On the other hand, the 3rd opening part 111A opened in the part which should become the bottom face part 110 is used as several screw holes for the screw at the time of attaching the duct main body 100 to a wall etc.

Since the first opening 121A, the second opening 121B, and the third opening 111A are processed for the flat resin plate 500, they can be opened by one punch 400 at the same time.
In addition, since the punch 400 only needs to move in the vertical direction, the driving mechanism of the punch 400 becomes simple.

  The punched piece punched by the punch 400 is discharged to the outside through a punching hole 330 that extends from the die portion 320 of the die 300 to the base portion 310.

  Since the processing is performed on the flat resin plate 500, the punching hole 330 itself of the die portion 320 has substantially the same size and shape as the punched piece as shown in FIG. In this case, the punched piece is discharged smoothly.

  The duct main body manufacturing apparatus according to the first embodiment of the present invention is a duct main body of a wiring duct formed into a substantially bowl shape by bending the flat resin plate 500 having the openings 121 and the like thus opened. 1 is provided with a bending portion 600A that bends a portion corresponding to the side surface portion 120 of the duct body 100 of the flat resin plate 500, and the bending portion 600A includes the bending portion 600A. The holding stage 610A for holding a portion corresponding to the side surface portion 120 of the duct body 100 of the flat resin plate 500 heated so as to be bent, the male mold 620A provided on the upper side of the holding stage 610A, and the holding The holding stage 610A corresponds to the side surface portion 120 of the duct body 100 of the flat resin plate 500. The female mold 630A is provided below the stage 610A. The female mold 630A is arranged in a substantially bowl shape by combining a pair of female movable molds 631A that can be changed to a width corresponding to the outer width of the duct body 100 to be manufactured. The male mold 620A is configured by combining a pair of male movable molds 621A that can be changed to a width corresponding to the inner width of the side surface 120 of the duct body 100 to be manufactured, The male die 620A presses the flat resin plate 500 from the upper side and pushes it into the lower female die 630A, thereby forming the duct body 100.

  First, this duct main body manufacturing apparatus has a bending portion 600A as shown in FIG. The bending unit 600A includes a holding stage 610A, a male mold 620A, and a female mold 630A.

The holding stage 610A has a pair of opposed stages 611A, and the pair of stages 611A can be moved toward and away by a driving device (not shown). That is, the pair of stages 611A can change the size of the gap between them so that it can correspond to the flat resin plate 500 according to the size of the duct body 100 to be manufactured.
The interval between the pair of stages 611A is larger than the width dimension of the duct body 100 to be manufactured, and when the portion corresponding to the side surface portion 120 is bent, the portion corresponding to the bottom surface portion 110 does not contact the stage 611A. Is set to about.

  The female mold 630A is located below the holding stage 610A, specifically below the gap between the pair of stages 611A. The female mold 630A has a pair of substantially L-shaped female-side movable molds 631A and can be moved toward and away by a driving device (not shown). In other words, the distance between the pair of female-side movable molds 631A can be changed so that the distance is in accordance with the outer width of the side surface 120 of the duct body 100 to be manufactured.

  The female movable mold 631A is formed by integrally forming a side surface corresponding portion 632A corresponding to the side surface portion 120 of the duct main body 100 and a bottom surface corresponding portion 633A corresponding to the bottom surface portion 110 of the duct main body 100. .

  The male mold 620A is located above the holding stage 610A, specifically above the gap between the pair of stages 611A and directly above the female mold 630A. The male mold 620A has a pair of flat male moving molds 621A and can be moved toward and away by a driving device (not shown). That is, the distance between the pair of male movable molds 621A can be changed so that the distance is in accordance with the inner width dimension of the side surface portion 120 of the duct body 100 to be manufactured.

  The contact / separation movement of the stage 611A of the holding stage 610A, the male movable mold 621A of the male mold 620A, and the female movable mold 631A of the female mold 630A corresponds to the size of the duct body 100 to be manufactured. It is designed to be performed synchronously.

  Further, the bending portion 600A is also provided with a heating portion 650A for heating the flat resin plate 100. The heating unit 650A heats two boundaries between a portion corresponding to the side surface portion 120 and a portion corresponding to the bottom surface portion 110 of the flat resin plate 100 before the bending process. As shown to (A), it contacts from the flat resin plate 500 lower side.

Next, the bending process of the flat resin plate 500 by the bending unit 600A configured as described above will be described with reference to FIG.
First, the heating unit 650A is heated and softened by being brought into contact with two boundary points between a portion corresponding to the side surface portion 120 and a portion corresponding to the bottom surface portion 110 of the flat resin plate 500. This heating facilitates bending of the flat resin plate 500 (see FIG. 1A).

Next, the heated flat resin plate 500 is moved to the holding stage 610A. A portion corresponding to the side surface portion 120 of the flat resin plate 500 is held by the pair of stages 611A (see FIG. 1B). In this state, the male mold 620A is positioned on the upper side of the flat resin plate 500, and the female mold 630A is positioned on the lower side.
In this state, the male movable mold 621A of the male mold 620A corresponds to the inner dimension between the side surfaces 120 of the duct body 100 to be manufactured, and the female movable mold 631A of the female mold 630A should be manufactured. This corresponds to the outer dimension between the side surfaces 120 of the duct body 100.

The male mold 620A is lowered and the flat resin plate 500 is pushed into the female mold 630A (see FIG. 1C).
If the flat resin plate 500 is completely pushed into the female mold 630A, the state is maintained and the flat resin plate 500 is cooled and solidified in the shape of the duct body 100 (see FIG. 1D).

  When the flat resin plate 500 is solidified in the shape of the duct main body 100, the male mold 620A is pulled upward and the female mold 630A is pulled downward. Thus, the duct body 100 is completed (see FIG. 1E).

  Note that the holding stage 610A is omitted in FIGS. 1D and 1E for the sake of drawing.

  If a wider duct body 100 is manufactured, the width of the pair of male movable molds 621A of the male mold 620A and the width of the pair of female movable molds 631A of the female mold 630A are made wider and held. This can be dealt with by widening the distance between the pair of stages 611A of the stage 610A.

Next, a duct body manufacturing apparatus according to a second embodiment of the present invention will be described with reference to FIG.
The duct main body manufacturing apparatus according to the second embodiment of the present invention is a duct main body manufacturing apparatus that manufactures a duct main body 100 of a wiring duct formed in a substantially bowl shape, and is a duct main body of a flat resin plate 500. 100 is provided with a bent portion 600B that bends a portion corresponding to the side surface portion 120, and the bent portion 600B can be changed to a width corresponding to the inner width of the duct body 100 to be manufactured. A portion corresponding to the side surface portion 120 of the duct body 100 is held while holding a male die 620B configured by combining a pair of male movable molds 621B and a flat resin plate 500 heated so as to be bent. A bending stage 640B having a pair of wing molds 641B that are folded to be bent, and the wing molds 641B are arranged outside the duct body 100 to be manufactured. The width can be changed to a width corresponding to the width, and the wing mold 641B rotates toward the male mold 620B from the state where the flat resin plate 500 is held, and the wing mold 641B and the male mold 620B are rotated. The duct body 100 is formed by sandwiching a portion corresponding to the side surface portion 120.

  The duct main body manufacturing apparatus according to the second embodiment is different from that according to the first embodiment in that the holding stage 610A and the female mold 630A in the first embodiment are bent. Stage 640B is a substitute.

  First, the bending part 600B in the duct main body manufacturing apparatus according to the second embodiment has a male mold 620B and a bending stage 640B.

  The bending stage 640B includes a pair of wing dies 641B and a pair of holding portions 645B that hold the flat resin plate 500 in cooperation with the wing dies 641B.

The wing mold 641B can be moved toward and away by a driving device (not shown). That is, the pair of wing molds 641B can change the size of the gap between them so that it can correspond to the flat resin plate 500 according to the size of the duct body 100 to be manufactured.
The pair of wing dies 641B is positioned between the shaft portion 642B that is the center of rotation, the side surface corresponding portion 643B that extends from the shaft portion 642B, and the side surface corresponding portion 643B and the shaft portion 642B. Thus, the connecting portion 644B that connects the two is integrally formed. The side surface corresponding portion 643 </ b> B is a portion that contacts the outside of the side surface portion 120 when the flat resin plate 500 is deformed into the duct body 100. Further, the connecting portion 644B is one step lower than the side surface corresponding portion 643B, and does not come into contact with the flat resin plate 500.

  The pair of holding portions 645B is located between the pair of wing dies 641B, directly below the pair of male movable dies 621B of the male 620B, and the side corresponding portion of the opened wing dies 641B. It is located on the same plane as 643B. That is, the holding portion 645B holds the flat resin plate 500 horizontally in cooperation with the side surface corresponding portion 643B of the wing die 641B when the pair of wing dies 641B is open.

The male mold 620B is located above the bending stage 640B, specifically above the gap between the pair of wing dies 641B and directly above the holding portion 645B. The male mold 620B has a pair of flat male movable molds 621B and can be moved toward and away by a driving device (not shown). That is, the distance between the pair of male movable molds 621B can be changed so that the distance is in accordance with the inner width dimension of the side surface portion 120 of the duct body 100 to be manufactured.
The male movable mold 621B corresponds to the inside of the side surface portion 120 of the duct body 100.

  Note that the contact / separation of the male movable mold 621B of the male mold 620B with the wing mold 641B and the holding portion 645B of the bending stage 640B is performed in synchronization with the size of the duct body 100 to be manufactured. It has become.

  Further, the bending portion 600B is also provided with a heating portion 650B for heating the flat resin plate 500. The heating unit 650B heats two boundaries between a portion corresponding to the side surface portion 120 and a portion corresponding to the bottom surface portion 110 of the flat resin plate 500 before the bending process. As shown to (A), it contacts from the flat resin plate 500 lower side.

Next, the bending process of the flat resin plate 500 by the bending unit 600B configured as described above will be described.
First, the heating unit 650B is brought into contact with two portions of a portion corresponding to the side surface portion 120 and a portion corresponding to the bottom surface portion 110 of the flat resin plate 500 to be heated and softened. This heating facilitates bending of the flat resin plate 500 (see FIG. 2A).

Next, the flat resin plate 500 that has been heated is moved to the bending stage 640B. A portion corresponding to the side surface portion 120 of the flat resin plate 500 is held by a pair of wing molds 641B and a pair of holding portions 645B positioned therebetween (see FIG. 2B). In this state, the male mold 620B is positioned on the upper side of the flat resin plate 500.
In this state, the male movable mold 621B of the male mold 620B corresponds to the inner dimension between the side surfaces 120 of the duct body 100 to be manufactured, and the wing mold 641B is closed and the duct to be manufactured. This corresponds to the outer dimension between the side surfaces 120 of the main body 100.

As shown in FIG. 2C, if the male mold 620B is lowered and the flat resin plate 500 is sandwiched between the male movable mold 621B and the holding portion 645B (see arrow a in FIG. 2C). ), The wing mold 641B is rotated from the open state to the closed state (see arrow b in FIG. 2C).
If the flat resin plate 500 is completely sandwiched between the wing mold 641B, the male die 620B, and the holding portion 645B, the flat resin plate 500 is cooled and the flat resin plate 500 is cooled to maintain the state. Solidify in the shape of 100 (see FIG. 2D).

  When the flat resin plate 500 is hardened in the shape of the duct main body 100, the male mold 620B is extracted upward and the wing mold 641B is opened. Thus, the duct body 100 is completed (see FIG. 2E).

Next, a duct body manufacturing apparatus according to the third embodiment of the present invention will be described. The duct body manufacturing apparatus according to the third embodiment is different from that according to the second embodiment in that the wing mold 641C of the bending stage 640C is also used as the holding portion 645B in the second embodiment. Therefore, there is no equivalent to the holding portion 645B in the second embodiment.
The duct body manufacturing apparatus according to the third embodiment is different from that according to the first embodiment in that the female movable mold 631B in the first embodiment is a wing. The mold 641C is in a point of rotating between an open state and a closed state.

The wing mold 641C constituting the bending stage 640C of the bending unit 600C in the duct body manufacturing apparatus according to the third embodiment includes a side surface corresponding part 643C corresponding to the side surface part 120 of the duct body 100, and the duct body 100. The bottom surface corresponding portion 644C corresponding to the bottom surface portion 110 is substantially L-shaped integrally formed.
A shaft portion 642C serving as the center of rotation of the wing mold 641C is provided at the inner end of the bottom surface corresponding portion 644C.

  Even if the pair of wing dies 641C are completely opened, the side surface corresponding portion 643C is not horizontal. The inner front end portion of the side surface corresponding portion 643C and the inner front end portion of the bottom surface corresponding portion 644C are located on the same plane. That is, the flat resin plate 500 is held horizontally by the inner front end portion of the side surface corresponding portion 643C and the inner front end portion of the bottom surface corresponding portion 644C.

  The male movable mold 621C of the male mold 620C is located directly above the bottom surface corresponding part 644C of the wing mold 641C.

  Further, the bending unit 600C in the duct body manufacturing apparatus according to the third embodiment is also provided with a heating unit 650C for heating the flat resin plate 500. The heating unit 650C heats two boundaries between a portion corresponding to the side surface portion 120 and a portion corresponding to the bottom surface portion 110 of the flat resin plate 500 before bending processing. As shown to (A), it contacts from the flat resin plate 500 lower side.

Next, bending of the flat resin plate 500 by the duct main body manufacturing apparatus according to the third embodiment having the bending portion 600C configured as described above will be described with reference to FIG.
First, the heating unit 650C is heated and softened by being brought into contact with two boundary points between a portion corresponding to the side surface portion 120 and a portion corresponding to the bottom surface portion 110 of the flat resin plate 500. This heating facilitates bending of the flat resin plate 500 (see FIG. 3A).

Next, the heated flat resin plate 500 is moved to the bending stage 640C. A portion corresponding to the side surface portion 120 of the flat resin plate 500 contacts the inner front end portion of the pair of wing dies 641C, and a portion corresponding to the bottom surface portion 110 of the flat plate resin plate 500 corresponds to the pair of wing dies 641C. It contacts the inner front end portion of the bottom surface corresponding portion 644C.
Thereby, the flat resin plate 500 is held horizontally. (See FIG. 3B).
In this state, the male movable mold 621C of the male mold 620C corresponds to the inner dimension between the side surfaces 120 of the duct body 100 to be manufactured, and the wing mold 641C is closed and the duct to be manufactured. This corresponds to the outer dimension between the side surfaces 120 of the main body 100.

As shown in FIG. 3C, if the male mold 620C is lowered and the flat resin plate 500 is sandwiched between the male movable mold 621C and the bottom surface corresponding portion 644C of the wing mold 641C (FIG. 3 ( C) (see arrow a)), the wing mold 641C is rotated from the open state to the closed state (see arrow b in FIG. 3C).
If the flat resin plate 500 is completely sandwiched between the wing mold 641C and the male die 620C, the flat resin plate 500 is cooled by maintaining the state and the shape of the duct main body 100. (See FIG. 3D).

  When the flat resin plate 500 is solidified in the shape of the duct body 100, the male mold 620C is extracted upward, and the wing mold 641C is opened. Thus, the duct body 100 is completed (see FIG. 3E).

100 Duct body 500 Flat resin plate 600A Bending portion 610A Holding stage 620A Male 621A Male movable mold 630A Female mold 631A Female movable mold

Claims (4)

  In the method for manufacturing a duct main body of a wiring duct formed in a substantially bowl shape, the method includes a bending step of bending a flat resin plate into a duct main body, and the bending step includes A holding stage for holding a portion corresponding to the side surface portion of the duct body of the flat resin plate heated so as to be processed, a male die provided on the upper side of the holding stage, and a female die provided on the lower side of the holding stage The holding stage holds a portion corresponding to the side surface of the duct body of the flat resin plate, and the female mold corresponds to the outer width of the duct body to be manufactured. A pair of female movable molds whose width dimensions can be changed are combined to form a substantially bowl shape, and the male mold corresponds to the inner width dimension of the side surface of the duct body to be manufactured. A pair of males whose width can be changed as much as possible And the movable mold are combined, the manufacturing method of the duct main body of the wiring duct and forming the duct body by pushing the female lower by pressing down the male tabular resin plate from the upper side.   In the method for manufacturing a duct main body of a wiring duct formed in a substantially bowl shape, the method includes a bending step of bending a flat resin plate into a duct main body, and the bending step is manufactured. Holds a male mold with a width corresponding to the inner width of the duct body and a flat resin plate that is heated so that it can be folded and folded to fold the portion corresponding to the side of the duct body. And a bending stage having a pair of wing dies, wherein the wing dies rotate from the state holding the flat resin plate toward the male dies, and the wing dies and the male A method for manufacturing a duct body of a wiring duct, wherein a duct body is formed by sandwiching a portion corresponding to a side surface portion with a mold.   In the duct main body manufacturing apparatus for manufacturing the duct main body of the wiring duct formed in a substantially bowl shape, the bending processing section for bending the portion corresponding to the side surface portion of the duct main body of the flat resin plate is provided. The bending portion includes a holding stage for holding a portion corresponding to a side surface portion of a duct body of a flat resin plate heated so as to be bent, a male die provided on the upper side of the holding stage, and the holding The holding stage holds a portion corresponding to a side surface portion of the duct body of the flat resin plate, and the female mold is a duct body to be manufactured. A pair of female movable molds that can be changed to a width dimension corresponding to the outer width dimension are combined and arranged in a substantially bowl shape, and the male mold is an inner width dimension of the side surface portion of the duct body to be manufactured. It is possible to change to the width dimension corresponding to The duct body is formed by combining a pair of male movable molds, and the male mold forms a duct body by pressing the flat resin plate from the upper side and pressing it into the lower female mold. apparatus.   In the duct main body manufacturing apparatus for manufacturing the duct main body of the wiring duct formed in a substantially bowl shape, the bending processing section for bending the portion corresponding to the side surface portion of the duct main body of the flat resin plate is provided. The bending portion is heated so that it can be bent and a male die configured by combining a pair of male movable molds that can be changed to a width corresponding to the inner width of the duct body to be manufactured. And a bending stage having a pair of wing molds that hold the flat resin plate and are folded to bend the portion corresponding to the side surface portion of the duct body, and the wing mold should be manufactured. The width can be changed to a width corresponding to the outer width of the duct body, and the wing mold rotates from the state holding the flat resin plate toward the male mold, and the wing mold and the male mold It corresponds to the side part by Partial duct body manufacturing apparatus characterized by forming the duct body by is held.

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