JP2007290255A - Resin molded article, damper device and manufacturing method of resin molding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin molded article which can prevent mounting problem even when a plate shape partition wall formed by a slide die mold is reinforced with ribs, and can avoid the strength of the slide die mold from remarkably being reduced, a damper device using the resin molded article as a frame, and a manufacturing method of the resin molded article. <P>SOLUTION: The frame 4 used for the damper device is provided with ribs 426, 427 projecting from the surface of the side where a first partition wall 41 is positioned only on both end parts of the tip end part 420 when the rib is formed on a second partition wall 42 molded by the slide die mold 8. Therefore, since grooved recessed parts 86, 87 are formed only at both end parts of the width direction on the slide die mold 8, the strength reduction of the slide die mold 8 can be prevented. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a resin molded product that constitutes a frame of a damper device that switches a flow path by opening and closing an opening through which a fluid passes, a damper device including the frame, and a method for manufacturing the resin molded product. .

  As shown in FIG. 5, the damper device used in the refrigerator or the like includes a first partition 41 and a second partition extending from the end of the first partition 41 in a direction intersecting the first partition 41. Between the first partition 41 and the second partition 42, as shown by an arrow A, in the frame 4 including the center 4 and the first partition 41 and the second partition 42. A damper provided with a first baffle 11 that can be rotated to selectively open and close a first opening 31 formed in the first partition wall 41 and a second opening 32 formed in the second partition wall 42. An apparatus has been proposed (see Patent Document 1).

  In the damper device disclosed in this patent document, the third partition wall 43 extends from the intersection of the first partition wall 41 and the second partition wall 42 to the opposite side of the first partition wall 41, and As shown by the arrow B, the second partition wall 42 and the third partition wall 43 are rotated around the intersection of the second partition wall 42 and the third partition wall 43 as shown by an arrow B. A second baffle 12 capable of selectively opening and closing the second opening 32 formed in 42 and the third opening 33 formed in the third partition wall 43 is disposed. Further, on the surface of the first partition 41 on the side where the second partition 42 is located, the first opening 32 is surrounded by a frame-shaped protrusion 411, and the third partition 43 is located on the side where the second partition 42 is located. In this surface, the third opening 33 is surrounded by a frame-shaped protrusion 431 to improve the sealing performance by the baffles 11 and 12.

In configuring such a damper device, when the frame 4 is formed of a resin molded product, the strength of the plate-like second partition wall 42 is low. For example, each of the upper end portion and the lower end portion of the second partition wall 42 is provided. A structure in which triangular reinforcing plates 46 and 47 are formed can be considered.
JP 2004-768 A

  However, in the damper device configured as shown in FIG. 5, the second partition wall 42 remains in a thin plate shape, so there is no catching portion. Therefore, when attaching to a refrigerator or the like, the tip of the second partition wall 42 There is a problem in that the 420 gets on the mounting rail, resulting in a mounting failure.

  Further, even when the reinforcing plates 46 and 47 as shown in FIG. 5 are provided, the second partition 42 is deformed by a force when the baffles 11 and 12 abut against the second partition 42. There is a fear. Therefore, as shown in FIG. 6A, ribs 429 protruding perpendicularly from the surface on which the first partition wall 41 is located with respect to the tip portion 420 of the second partition wall 42 are provided on the second partition wall 42. It can be considered to be provided over the entire width direction. Further, when the frame 4 is formed, as shown in FIG. 6B, if the surface of the second partition 42 on the side where the first partition 41 is located is formed by the slide mold 8A, the slide mold 8A is formed. The rib 429 can be formed simply by forming the concave portion 82A on the molding surface, and the second opening 32 can be formed only by forming the convex portion 81A on the molding surface.

  However, when the rib 429 is provided on the entire front end portion 420 of the second partition wall 42, there is a problem that the strength of the slide mold 8A is lowered and the slide mold 8A is easily damaged. That is, in the frame 4, since it is necessary to arrange the reinforcing plates 46 and 47 on both sides of the second partition wall 42, a slide mold 8A having a width dimension equal to that of the second partition wall 42 is used. Therefore, when the rib 429 is provided on the entire tip 420 of the second partition wall 42, the recess 82A is formed over the entire width of the slide mold 8A. As a result, the slide is formed at the portion where the recess 82A is formed. The mold 8A is easily damaged.

  Further, when the first partition 31 is surrounded by the frame-shaped protrusion 411 in the first partition wall 41, the moving range of the slide mold 8A is secured in the out-of-plane direction of the second partition wall 42. Since a thin mold is used as the slide mold 8A, breakage of the slide mold 8A at the portion where the recess 82A is formed is more likely to occur.

  In view of the above problems, the problem of the present invention is that the strength of the slide mold is significantly reduced even when a plate-like partition formed by the slide mold is reinforced with ribs, preventing mounting problems. It is an object of the present invention to provide a resin molded product capable of avoiding the above, a damper device using the resin molded product as a frame, and a method for manufacturing the resin molded product.

  In order to solve the above problems, in the present invention, a first wall portion and a second wall portion extending in a direction intersecting with the first wall portion from the first wall portion are integrally formed. In the resin molded product, the second wall portion has a plate shape having a predetermined width dimension, and the tip of the second wall portion is on the side where the first wall portion is located. A plate-like rib protruding perpendicularly from the surface is formed, and the rib is formed at a part of the second wall portion in the width direction of the tip portion of the second wall portion. And

  In the method of manufacturing a resin molded product according to the present invention, the surface of the second wall portion on which the first wall portion is located can be displaced in an out-of-plane direction perpendicular to the surface. The slide mold having the same width as the wall portion 2 is formed.

  In this invention, the rib which protruded in the side in which the 1st wall part is located with respect to the front-end | tip part of a 2nd wall part is provided. For this reason, when the resin molded product according to the present invention is attached to a refrigerator or the like, the rib can be used as a catching portion, so that it is possible to eliminate the attachment trouble that the tip of the second wall portion rides on the attachment rail. Further, the plate-like second wall portion can be reinforced by the ribs. Furthermore, when the rib is provided at the tip of the second wall portion, the rib is formed only on a part of the second wall portion in the width direction. For this reason, even when the surface of the second wall portion where the first wall portion is located is formed by a slide mold, the slide mold is formed with ribs only in a part in the width direction. It is sufficient to form a concave portion. Therefore, unlike the case where the concave portion is formed over the entire width direction of the slide mold, it is possible to avoid the strength of the slide mold from being significantly lowered.

  In the present invention, it is possible to employ a configuration in which the rib is formed at each of both end portions in the width direction among the distal end portion of the second wall portion.

  In the present invention, the rib has a projecting dimension gradually decreasing from the second wall portion at a boundary portion between a tip portion of the second wall portion and a portion where the rib is not formed. preferable. With this configuration, since the end of the recess for forming the rib in the slide mold can be configured with a tapered surface, the slide slide can be formed even when the recess extending in the width direction is formed with respect to the slide mold. It is possible to minimize the decrease in the strength.

  In particular, according to the present invention, the width dimension of the second wall portion is formed on the surface on the side where the second wall portion is located on the first wall portion, and on both sides of the second wall portion. It is effective when applied to a resin molded product in which the first protrusions facing each other through a distance equal to are formed. When manufacturing such a resin molded product, the width dimension of the slide mold and the second wall portion is equal, but when the present invention is applied, the slide mold has only a part in the width direction. Further, it is only necessary to form a recess for forming the rib, and it is not necessary to form the recess over the entire width of the slide mold. Therefore, it is possible to avoid a significant decrease in the strength of the slide mold.

  The present invention is particularly effective when applied to a resin molded product in which a second protrusion is formed on a surface of the first wall portion where the second wall portion is located. When the second protrusion is formed on the surface of the first wall portion where the second wall portion is located, the moving range of the slide mold is ensured in the out-of-plane direction of the second wall portion. Therefore, if the slide mold is thin, if the present invention is applied, the strength of the slide mold can be increased even when a recess for forming a rib is formed in such a thin slide mold. A significant decrease can be avoided.

  The resin molded product according to the present invention is used, for example, as a frame of a damper device. In this case, a baffle that rotates around an intersection of the first wall portion and the second wall portion is disposed between the first wall portion and the second wall portion, The baffle selectively opens and closes the first opening formed in the first wall portion and the second opening formed in the second wall portion.

  In this invention, the rib which protruded in the side in which the 1st wall part is located with respect to the front-end | tip part of a 2nd wall part is provided. For this reason, when the resin molded product according to the present invention is attached to a refrigerator or the like, the rib can be used as a catching portion, so that it is possible to eliminate the attachment failure such that the tip of the second wall portion rides on the attachment rail. Further, the plate-like second wall portion can be reinforced by the ribs. Furthermore, when the rib is provided at the tip of the second wall portion, the rib is formed only on a part of the second wall portion in the width direction. For this reason, even when the surface of the second wall portion where the first wall portion is located is formed by a slide mold, the slide mold is formed with ribs only in a part in the width direction. It is sufficient to form a concave portion. Therefore, unlike the case where the concave portion is formed over the entire width direction of the slide mold, it is possible to avoid the strength of the slide mold from being significantly lowered.

  Embodiments of the present invention will be described with reference to the drawings. In the following description, in order to make the correspondence easy to understand, the same reference numerals are given to the portions common to the damper device described with reference to FIGS.

(Basic configuration of damper device)
1A to 1C are explanatory views showing the basic configuration of a damper device to which the present invention is applied. FIG. 1A shows a state in which the baffle has opened all the openings of the partition walls. 1B and 1C show a state in which the baffle closes a part of the opening of the partition wall.

  A damper device 1 shown in FIG. 1 (A) is a device for controlling the supply of cold air to a plurality of storage rooms in a refrigerator, and includes a first partition wall 41 (first wall portion) and the first partition wall. A frame 4 including a second partition wall 42 (second wall portion) extending from the end of the partition wall 41 in a direction intersecting with the first partition wall 41 at an angle of 90 °; A first opening 31 and a second partition formed in the first partition 41 by rotating around the intersection of the first partition 41 and the second partition 42 with the second partition 42. And a first baffle 11 capable of selectively opening and closing the second opening 32 formed in 42.

  In addition, the damper device 1 of the present embodiment has a third partition 43 (third wall) on the opposite side of the first partition 41 from the intersection of the first partition 41 and the second partition 42 in the frame 4. And the second partition wall 42 and the third partition wall 43 are rotated between the second partition wall 42 and the third partition wall 43 around the intersection of the second partition wall 42 and the third partition wall 43. The second baffle 12 capable of selectively opening and closing the second opening 32 formed in the partition wall 42 and the third opening 33 formed in the third partition wall 43 is provided. Here, the 1st baffle 11 and the 2nd baffle 12 are arrange | positioned so that the angle of 90 degrees may be made, and it drives integrally by a common drive device (not shown).

  In such a damper device 1, as shown in FIG. 1 (A), cold air is supplied from the cold air supply path indicated by the arrow C 0, and the cold air is supplied from the first opening 31 and the first as shown by the arrow C 1. The first flow path passing through the three openings 33 or the second flow path passing through the second opening 32 as indicated by the arrow C2 is formed. Here, when the positions of the first baffle 11 and the second baffle 12 are changed as shown in FIG. 1B by the driving device, the second opening is caused by the first baffle 11 and the second baffle 12. Since 32 is closed, the 1st flow path C1 shown to FIG. 1 (A) is formed. Further, when the positions of the first baffle 11 and the second baffle 12 are changed by the driving device as shown in FIG. 1C, the first opening 31 is closed by the first baffle 11, and Since the 3rd opening 33 is closed by the 2nd baffle 12, the 2nd channel C2 shown in Drawing 1 (A) is formed.

(Detailed description of damper device 1)
2A, 2B, 2C, and 2D are respectively a front view, a rear view, and a partial view of the damper device 1 to which the present invention is applied as viewed from the side where the second partition wall extends. It is the top view shown missing and a left view. 2A and 2B, the baffles 11 and 12 are in the positions shown in FIG. 1C. In FIG. 2C, the baffles 11 and 12 are in the positions shown in FIG. is there. 3A, 3B, and 3C are a front view, a plan view, and a bottom view of the frame 4 used in the damper device 1 to which the present invention is applied, respectively.

  2 (A), (B), (C), (D) and FIGS. 3 (A), (B), (C), the damper device 1 of the present embodiment is arranged from the upper surface of the frame 4. The case 2 is fixed to a rectangular support plate portion 45 extending rearward by using a shaft portion 48, and a driving device (not shown) is built in the case 2.

  The frame 4 is a T-shaped resin molded product in which a first partition 41, a second partition 42, and a third partition 43 are integrally formed, and includes the first partition 41 and the third partition 43. A frame-like protrusion 40 (first protrusion) for reinforcing the frame 4 protrudes on the outer peripheral edge of the main body portion on the side where the second partition wall 42 is located. Further, on the front surface of the first partition wall 41 and the third partition wall 43 (the side on which the second partition wall 42 is located), the periphery of the first opening 31 and the second opening 32 is a rectangular tube-shaped frame projection 411. , 431 (second protrusions), and on the back side of the first partition wall 41 and the third partition wall 43, the periphery of the first opening 31 and the second opening 32 is cylindrical. Surrounded by frame-like protrusions 412 and 432. However, the second partition wall 42 has a plate shape on which no frame-like protrusions are formed.

  In the frame 4, triangular reinforcing plates 46 and 47 (first protrusions) are formed on the upper end portion and the lower end portion of the plate-like second partition wall 42, respectively. Connected to the protrusion 40. Accordingly, the reinforcing plates 46 and 47 and the frame-shaped protrusion 40 are formed on the surface of the first partition wall 41 on the side where the second partition wall 42 is located, on both sides of the second partition wall 42 therebetween. Protrusions that face each other through a distance equal to the width dimension of 42 are formed. Note that three ribs 421 are formed at the root portions of both surfaces of the second partition wall 42.

  As shown in FIGS. 1, 2A, and 2C, the first drive shaft 71 of the drive device is formed in the hole 710 of the frame 4 at the intersection of the first partition wall 41 and the second partition wall 42 (see FIG. 1). 3 (B)) and extends into the frame 4, and the end of the first baffle 11 is connected to the first drive shaft 71. Further, at the intersection of the second partition wall 42 and the third partition wall 43, the second drive shaft 72 of the drive device extends into the frame 4 through the hole 720 (see FIG. 3B) of the frame 4, An end of the second baffle 12 is connected to the second drive shaft 72. In the first baffle 11, an elastic member 91 made of foamed resin or the like that contacts the frame-shaped protrusion 411 is attached to the surface on which the first partition wall 41 is located (FIG. 2A, FIG. 2). (See (C)), in the second baffle 12, an elastic member 92 made of foamed resin or the like that comes into contact with the frame-shaped protrusion 431 is attached to the surface on which the third partition wall 43 is located (FIG. 2). (B), see FIG. 2C). On the other hand, an elastic member 93 made of foamed resin or the like is pasted along one side of the second opening 32 on the surface of the second partition wall 42 where the first partition wall 41 is located (FIG. 2 ( A) and FIG. 2C), an elastic member 94 made of foamed resin or the like is pasted around the second opening 32 on the surface of the second partition wall 42 on which the third partition wall 43 is located. (See FIGS. 2A and 2C).

  The frame 4 configured in this manner is used while being fixed at an intermediate position in the cold air passage in the refrigerator. At that time, the distal end portion of the second partition wall 42 is mounted in a groove of a member constituting the cold air passage.

(Rib structure of the second partition wall 42)
4A and 4B are a perspective view showing a part of the frame 4 used in the damper device 1 of the present embodiment, and an explanatory view showing a manufacturing method thereof.

  In the damper device 1 of the present embodiment, the reinforcing structure described above is adopted for the partition walls 41, 42, 43 in the frame 4, but further, FIGS. 2 (A), 2 (C), 3 (A), ( As shown in B), (C) and FIGS. 4A and 4B, the front end portion 420 of the second partition wall 42 protrudes vertically from the surface on the side where the first partition wall 41 is located. Shaped ribs 426 and 427 are formed. Here, the ribs 426 and 427 are connected to rectangular portions formed at both ends in the width direction of the second partition wall 42 in the tip portion 420 of the second partition wall 42. However, the ribs 426 and 427 are not formed in the entire width direction of the front end portion 420 of the second partition wall 42 but are formed only at both ends, and in the width direction of the front end portion 420 of the second partition wall 42. As shown in FIGS. 4A and 4B, the central portion 425 is an interrupted portion of the ribs 426 and 427.

  Further, in the present embodiment, the ribs 426 and 427 are formed on the boundary portion with the central portion 425 where the ribs 426 and 427 are not formed in the tip portion 420 of the second partition wall 42 from the first partition wall 42. Taperings 428 and 429 having progressively decreasing projecting dimensions are provided.

(Frame manufacturing method and main effects of this embodiment)
As described above, since the frame 4 used in the damper device 1 of the present embodiment has the ribs 426 and 427 having the above-described structure, as described below with reference to FIG. When molding a molded product, the mold is not easily damaged.

  First, in this embodiment, when the frame 4 is manufactured, resin molding is performed in a mold, and ribs 426 and 427 are formed on the surface of the second partition 42 on the side where the first partition 41 is located. Therefore, in order to form the surface of the second partition wall 42 on which the first partition wall 41 is located, the slide mold 8 that is movable in an out-of-plane direction perpendicular to the surface is used. There is a need. In addition, if the slide mold 8 is used, the second opening 32 can be formed in the second partition wall 42 by providing a rectangular projection 81 on the molding surface.

  Here, since the frame-shaped protrusion 40 and the reinforcing plates 46 and 47 are formed on the surface of the first partition 41 on the side where the second partition 42 is located, the slide mold 8 is the second mold. The partition wall 42 having the same width dimension is used. Further, in this embodiment, since the frame-shaped protrusion 411 is formed on the surface of the first partition 41 on the side where the second partition 42 is located, it is out of the plane perpendicular to the second partition 42. In order to form the slide mold 8 so as to be movable in the direction, it is necessary to use a thin one as the slide mold 8.

  However, in this embodiment, since the ribs 426 and 427 are formed only at both ends in the width direction of the front end portion 420 of the second partition wall 42, the slide mold 8 is provided only at both ends in the width direction. The groove-shaped recesses 86 and 87 for forming the ribs 426 and 427 may be formed. Therefore, unlike the case where the concave portion is formed in the entire width direction of the slide mold 8 (see FIG. 6), it is possible to avoid the strength of the slide mold 8 from being significantly reduced.

  In this embodiment, the ribs 426 and 427 are gradually reduced in projecting dimension from the second partition wall 42 at the boundary portion with the central portion 425 where the ribs 426 and 427 are not formed at the tip 420 of the second partition wall 42. Therefore, the inner end portions 861 and 871 of the concave portions 86 and 87 for forming the ribs 426 and 427 in the slide mold 8 are tapered surfaces. For this reason, even when the concave portions 86 and 87 extending in the width direction with respect to the slide mold 8 are formed, the strength reduction of the slide mold 8 can be minimized.

  Further, when the frame 4 is fixed at a midway position in the cold air passage in the refrigerator, the tip portion 420 of the second partition wall 42 is mounted in the groove of the member constituting the cold air passage. Since the inner end portions of the ribs 426 and 427 formed on the tip portion 420 of the partition wall 42 are tapered 428 and 429, the taper 428 and 429 can be used as a guide. It can be securely fitted in the 420 groove. With this configuration, when the damper device 1 is attached to a refrigerator or the like, it is possible to eliminate an attachment failure such that the tip portion 420 of the second partition wall 42 rides on the attachment rail.

(A)-(C) is explanatory drawing which shows the fundamental structure of the damper apparatus to which this invention is applied, respectively. (A), (B), (C), (D) are respectively a front view, a rear view, a side view, a plan view showing a part cut away, and a frame used in a damper device to which the present invention is applied; It is a left side view. (A), (B), (C) is the front view of the flame | frame 4 used for the damper apparatus to which this invention is applied, a top view, and the bottom view shown partly cut away. (A), (B) is the perspective view which notches and shows a part of flame | frame used for the damper apparatus to which this invention is applied, and explanatory drawing which shows the manufacturing method. It is a perspective view which notches and shows a part of flame | frame used for the conventional damper apparatus. (A), (B) is the perspective view which notches and shows a part of flame | frame 4 used for the conventional damper apparatus, and explanatory drawing which shows the manufacturing method.

Explanation of symbols

1 Damper device 4 Frame (resin molded product)
8 Slide mold 11 First baffle 12 Second baffle 31 First opening 32 Second opening 33 Third opening 40 Frame-like protrusion (first protrusion)
41 1st partition (1st wall part)
42 2nd partition (2nd wall part)
43 3rd partition 46, 47 Reinforcing plate (first protrusion)
81 Concave part 82 Convex part 86, 87 Concave part 411,431 Frame-shaped protrusion (2nd protrusion)
420 Second partition end 426, 427 Rib 428, 429 Taper

Claims (7)

In the resin molded product formed by integrally molding the first wall portion and the second wall portion extending from the first wall portion in a direction intersecting the first wall portion,
The second wall portion has a plate shape having a predetermined width dimension,
A plate-like rib protruding perpendicularly from the surface on which the first wall portion is located is formed at the tip of the second wall portion,
The said rib is formed in a part of width direction of the said 2nd wall part among the front-end | tip parts of the said 2nd wall part, The resin molded product characterized by the above-mentioned.   2. The resin molded product according to claim 1, wherein the rib is formed at each of both end portions in the width direction of the distal end portion of the second wall portion. 3.   3. The protruding dimension from the second wall portion is gradually reduced at a boundary portion between the tip portion of the second wall portion and a portion where the rib is not formed. A resin molded product characterized by   The second wall according to any one of claims 1 to 3, wherein the second wall portion is disposed on a surface of the first wall portion on a side where the second wall portion is located, on both sides of the second wall portion. A resin molded product, wherein first protrusions are formed to face each other through a distance equal to a width dimension of a wall portion.   5. The resin molded product according to claim 1, wherein a second protrusion is formed on a surface of the first wall portion where the second wall portion is located. A damper device using the resin molded product defined in any one of claims 1 to 5 as a frame,
The first wall portion is formed between the first wall portion and the second wall portion so as to rotate around an intersection of the first wall portion and the second wall portion. And a baffle capable of selectively opening and closing the second opening formed in the second wall portion.   In the manufacturing method of the resin molded product prescribed | regulated in any one of Claim 1 thru | or 5, the surface by which the said 1st wall part is located in the said 2nd wall part is an out-of-plane direction perpendicular | vertical to the said surface A method for producing a resin molded product, characterized in that it is molded by a slide mold having a width dimension equal to that of the second wall portion.

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