JPH09217729A - Resin molding with hinge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin molding with a high having a pivotally supporting structure with high accuracy without making looseness. SOLUTION: In a resin molding with a hinge whose movable part 3 is rotatably connected to a hinge part, a large diameter hole 9a and a small diameter hole 9b communicated with the large diameter hole 9a are formed on both side parts of a main body part 2, the movable part 3 is projectingly formed near one side of the main body 2, each loosely engaging shaft part 10 is provided with the inside of the large diameter hole 9a formed integratedly with both sides of the movable part, the movable part 3 is fitted by moving the shaft part 10 from the large diameter hole 9a to the small diameter hole 9b. It is, thus, possible to form a rotatable manufacture shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin molded product with a hinge part in which a movable part is rotatably connected to a main body part through a hinge part.

[0002]

2. Description of the Related Art As shown in FIG. 10, a resin molded body to which the present invention is applied has a structure in which a movable portion b is rotatably connected to a main body portion a through a hinge portion c. This is a structure in which the shaft portion e on the movable portion b side is fitted in the through hole d provided on the side portion of the main body portion a. In this type of resin molded body, the body part a and the movable part b are individually molded and then assembled, and the molding die is devised (mold construction described in Japanese Patent Publication No. 6-74802). It is also possible to mold integrally with the state or in one shot. Since the latter is molded into a product shape, it is easy to handle and has the advantage of reducing the number of assembly steps.

[0003]

However, in the latter case of the resin molded body structure with the hinge part, the ring-shaped auxiliary mold is provided in the molding mold having the molding surfaces corresponding to the main body part a and the movable part b. Since the shaft portion e is formed so as to be loosely fitted in the through hole d, a relatively large gap is structurally formed between the through hole d and the shaft portion e, and the shaft portion e is It becomes easy to rattle. Therefore, as the resin molded body, even if the movable portion b is rotatable through the fitting of the through hole d and the shaft portion e, in terms of quality in terms of accuracy due to the rattling,
It was not possible to adopt it, or the product accuracy was not satisfied.

The present invention has been made in order to solve the above-mentioned problems, and its purpose is to preform that the main body and the movable portion are integrally or one-shot molded with a resin material, and the hinge portion is loose. A structural object of the present invention is to provide a resin molded body with a hinge portion, which is structurally eliminated and can be provided with a highly accurate pivotal structure. Other purposes will be clarified in the following description.

[0005]

To achieve the above object, according to the present invention, a main body portion and a movable portion are integrally or one-shot molded, and the movable portion is rotated with respect to the main body portion via a hinge portion. In the resin molded body with a hinge portion that is operably connected, a large diameter hole for forming a hinge portion and a small diameter hole communicating with the large diameter hole are formed on both sides of the main body portion, while the main body is formed. A shaft portion for forming a hinge portion, which is formed so as to approach one side of the movable portion so as to project, and is integrally formed on both sides of the movable portion and is loosely fitted in the corresponding large-diameter hole. The movable portion is configured to move into the small diameter hole from the large diameter hole and fit into the small diameter hole so that the movable portion has a rotatable product shape.

According to the above construction, in the molded state,
The movable portion is formed so as to protrude from both side walls and the lower wall of the main body portion with a gap, and the shaft portion of the movable portion is loosely fitted in the large diameter hole on the main body portion side. Therefore, in order to obtain a product shape, the shaft portion is moved and fitted so as to be dropped from the large diameter hole to the small diameter hole. As a result, the movable portion is rotatably assembled to the main body portion through the fitting of the shaft portion and the small diameter hole.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 9 show an embodiment of a resin molded product with a hinge portion according to the present invention, and FIGS. 1 (a) and 1 (b) are enlarged views of the main structure in the state of FIGS. It is a figure. 2 to 5 show a resin molded body in a molded state, FIG. 7 shows a product shape in which a movable portion is rotatable at a regular position, and FIG. 8 shows a procedure for attaching an accessory component. FIG. 9 schematically shows the usage of the resin molded body.

1 to 7, a resin molded body 1 with a hinge portion is an example of a support frame for slidably holding an automobile door glass, and is made of polystyrene (PS).
It is injection molded as one part with resin material such as. Structurally, the main body 2 and the movable portion 3 rotatably provided on the main body 2 are provided, and the movable portion 3 is projected from one side of the main body 2 to the outside in a molded state. There is. Further, in this resin molded body 1, in particular, the arrangement of the main body portion 2 and the movable portion 3 and the pivotal support structure of the movable portion 3 are devised. Hereinafter, the entire structure in the molded state will be described in detail, and the structure of the main part will be clarified while explaining the method of assembling the product shape and the usage state.

(Structure of Main Body) The main body 2 has a substantially rectangular plate shape and is composed of a main portion 2a and both side portions 2b and 2c. The main portion 2a is provided on a cylindrical locking portion 4 formed to project in the center of the inner surface (or the upper surface), a standing wall portion 5 formed to project along the front side edge of the inner surface, and an outer center portion of the standing wall portion 5. The stepped locking portion 5a formed therein, the introduction hole 6 formed at the inner lower edge of the standing wall portion 5 and penetrating between the side portions 2b and 2c, and the rear side with respect to the side portions 2b and 2c. The side portion (the movable portion 3 side) has a cutout portion 2d that is cut out in a U shape. Further, the main portion 2a is thinner than both side portions 2b and 2c, the inner surface (or the upper surface) side is formed to be substantially flush, and the outer surface (or the lower surface) side forms a step.

The rear side of each of the side portions 2b and 2c has a bulge portion 7 which is provided so as to stand up on the rear portion, with the notch portion 2d located between them. Each bulging portion 7 is provided with a round hole 8 penetrating in the width direction. This daruma hole 8 is provided in the shaft portion 1 provided in the movable portion 3 as shown in FIG.
0 has a large diameter hole 9a located on the lower side and a small diameter hole 9b located above the large diameter hole 9a and communicating with the large diameter hole 9a. The large-diameter hole 9a is provided in the shaft portion 10
The diameter is set larger than the diameter of due to the constraints of the mold. On the other hand, the small diameter hole 9b is set without being restricted by the molding die, and is formed to be substantially equal to or slightly larger than the shaft portion 10. The boundary between the large-diameter hole 9a and the small-diameter hole 9b is set to the minimum-diameter locking hole portion 9c, and the shaft portion 10 is loosely fitted in the large-diameter hole 9a so that the large-diameter hole 9a can be engaged with the locking hole. After being pushed into the portion 9c and moved to the small diameter hole 9b, the small diameter hole 9b is rotatably fitted into the small diameter hole 9b so as not to accidentally come out.

(Movable Portion Structure) The movable portion 3 is formed so as to project in a direction substantially parallel to and opposite to the main body portion 2 from between the cutout portions 2d, and has a size to be superposed on the main body portion 2 as shown in FIG. It has a plate shape. An engaging shaft 11 is provided at the main portion 3a so as to protrude substantially in the center thereof and is pushed into the cylinder 4a of the locking portion 4.
And a standing wall portion 12 protruding from the intermediate edge portion on the rear side of the inner surface, and an engaging claw 12a as an engaging portion formed at the tip of the standing wall portion 12 and engaged with and disengaged from the locking portion 5a of the standing wall portion 5. And an introduction hole 13 formed in a portion of the main portion 3a near the standing wall portion 12 so as to penetrate between the both side portions 3b and 3c. The main portion 3a located directly below the engaging claw 12a
A through hole for die cutting is formed in the portion.

The sides of the side portions 3b, 3c approaching the main body portion 2 are notched so that the bulging portion 7 is accommodated together with a part of the main portion 3a. The side of the main portion 3a that approaches the main body portion 2 is located between the bulging portions 7 and 7, and the thick portion 3 is formed on the inner surface (or upper surface) thereof.
d is formed one step higher in the width direction. A shaft portion 10 that protrudes toward the inside of the large diameter hole 9a is provided on each end surface on both sides of the thick portion 3d. The shaft portion 10 is loosely fitted in the large diameter hole 9a.

The thick portion 3d and the main portion 2 of the main body portion 2
A gap L is set between a and a, as shown in FIG.
After the molding, the shaft portion 10 is prevented from hitting each other when being moved from the large diameter hole 9a to the small diameter hole 9b or when the movable portion 2 is rotated. Further, in molding, in addition to the molding die having the molding surfaces corresponding to the main body portion 2 and the movable portion 3, the shaft portion 10 is arranged in the large diameter hole 9a so as to be molded in the state described above. Auxiliary type is also used.
In terms of mold structure, it is also possible to mold the resin molded body 1 in a state where the main body portion 2 and the movable portion 3 are separated as shown in FIG. However, in terms of mold accuracy, the movable part 5 and the main body part 2
There is a case where a portion approached with is connected by a molten resin, but such a connecting portion has a thin wall shape that is easy to be crushed. Therefore, after molding, the shaft portion 10 is moved in the arrow direction of FIG. When moved to, it is easily damaged by stress.

(Procedure for Assembling into Product Shape) The resin molded body 1 with a hinge part as described above has a shaft part 10 in a molded state.
While protruding into the large diameter hole 9a on the main body 2 side,
The movable portion 3 is in a state of protruding from the rear portion of the main body portion 2 in the direction opposite to the main body portion 2. Therefore, when the resin molded body 1 is formed into a product shape as shown in FIGS. 1B and 7, for example, the movable portion 3 is pressed while the main body portion 2 is pressed.
Is pressed in the direction of the arrow in FIG. 7, that is, upward. Then, in the movable portion 3, the shaft portion 10 moves from the large diameter hole 9a to the locking hole portion 9
It is moved so that it is forcedly passed through c to be dropped into the small diameter hole 9b, and is fitted. Once fitted into the small diameter hole 9b, the shaft portion 10 is prevented from being inadvertently moved to the large diameter hole 9a side due to the existence of the locking hole portion 9c. As a result, the movable portion 3 is assembled to the main body portion 2 with the shaft portion 10 as a pivot fulcrum.

(Procedure for Assembling to Use State) As shown in FIG. 8, the hinge-shaped resin molded body 1 having the product shape has the cushion material 19 arranged on the outer surface of the main portion 2a of the main body portion 2, and The flocked member 20 is attached. As shown in FIG. 2, the flocked member 20 has a flocked part 2 on one side of the base cloth 21.
2 is formed in a predetermined range. A mounting hole 23 corresponding to the engagement shaft 11 and a mounting hole 24 corresponding to the locking portion 4 are provided on both sides of this. The flocked member 20 has one end drawn from the introduction hole 6 of the main body 2 to the locking part 4 side, and the attachment hole 24 is engaged with the locking part 4, while the other end side is movable part 3. The mounting hole 23 is engaged with the engaging shaft 11 by being pulled in from the introduction hole 13 toward the engaging shaft 11 side. The flocked portion 22 is provided in a wide portion excluding both sides of the base cloth 21, but it may be provided at least in a base cloth portion that covers the cushion material 19.

FIG. 8 shows a state in which the flocked member 20 is arranged on the resin molded body 1 in this way, and in this state it is incorporated on the door panel side of an automobile or the like. Although this door panel is not shown, a mounting bracket 26 is provided along the width direction of the door glass 25 as shown in FIG. The mounting bracket 26 has such a size and thickness that it can be sandwiched between the inner surface of the main body 2 and the inner surface of the movable portion 3, and
A mounting hole 26a into which the locking portion 4 can be inserted is provided. Therefore, the resin molding 1 with the flocked member 20 is
The main surface 2a of the main body 2 is opposed to the mounting bracket 26, and the locking portion 4 is inserted into the mounting hole 26a to be engaged and positioned. After that, the movable part 3
Is rotated toward the main body 2 with the shaft 10 fitted in the small diameter hole 9b as a fulcrum. In addition, the movable portion 3 and the main body portion 2
When and are pushed in the overlapping direction, the engagement shaft 11 engages with the inside of the cylinder 4a of the engaging portion 4 and the engaging claw 12a engages with the engaging portion 5a of the main body 2. The movable portion 3 is securely engaged with the main body portion 2 at two places. Further, the resin molded body 1 is mounted in a state where the mounting bracket 26 is sandwiched between the movable portion 3 and the main body portion 2, and the locking portion 4 is engaged with the mounting hole 26a. In this state, as shown in FIG. 9, the flocking member 20 is arranged with a predetermined tension on the outer surfaces of the main parts 2a, 3a of the main body part 2 and the movable part 3, and the part corresponding to the main part 2a is the door glass 25. It is brought into contact with the glass surface. As a result, the door glass 25 is held without rattling even when it is moved up and down.

The resin molding 1 of the present invention is not limited to a support frame for door glass, and may be any one as long as it meets the requirements of claim 1, and can be applied to various products or parts. It is a thing.

[0018]

As described above, the resin molded body with the hinge portion of the present invention has the following effects in addition to the advantages of the prior art in which the movable portion is integrally molded with the main body portion and the resin material. doing. For product shape, when the shaft moves from the large diameter hole to the small diameter hole and is fitted, the movable part can rotate with respect to the main body through the fitting of the shaft and the small diameter hole. Be assembled into. Therefore, the size of the small-diameter hole is not restricted during molding due to the relationship with the shaft portion, and can be set to a value with which the shaft portion can be fitted accurately. As a result, it is possible to obtain highly accurate fitting in the product shape, and it is possible to eliminate rattling of the movable portion. As described above, according to the present invention, the backlash of the movable portion can be structurally eliminated, so that the quality of applicable products can be improved and applicable products can be expanded.

[Brief description of drawings]

FIG. 1 is an enlarged side view showing a main structure of a resin molded body with a hinge portion according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the resin molded body together with auxiliary components in a molded state.

FIG. 3 is a top view showing the resin molded body in a molded state.

FIG. 4 is a view of the resin molded body of FIG. 3 as viewed from the left and right directions.

5 is a view of the resin molded body of FIG. 3 viewed from the side.

6 is a cross-sectional view taken along the line AA of FIG.

FIG. 7 is a view showing the resin molded body in a product shape.

FIG. 8 is a cross-sectional view showing an assembly of accessory parts after the resin molded body is formed into a product shape.

FIG. 9 is a side view showing a usage state of the resin molded body.

FIG. 10 is a side view for explaining an example of a conventional resin molded body with a hinge portion.

[Explanation of symbols]

 1 Resin Molded Body with Hinge Part 2 Main Part 2a Main Part 2b, 2c Side Part 3 Movable Part 3a Main Part 3b, 3c Side Part 4 Locking Part 7 Swelling Part 8 Daruma Hole 5a Locking Part 9a Large Diameter Hole 9b Small Diameter Hole 10 Shaft 11 Engagement shaft (engagement part) 12a Engagement claw (engagement part)

Claims (4)

[Claims] 1. A resin molded body with a hinge part, wherein a main body part and a movable part are integrally or one-shot molded, and the movable part is rotatably connected to the main body part via a hinge part. A large-diameter hole for forming a hinge portion and a small-diameter hole communicating with the large-diameter hole are formed on both sides of the main body portion, while the movable portion is protruded by approaching one side of the main body portion. In addition, each of the movable parts has a shaft part for forming a hinge part that is integrally formed on both sides of the movable part and is loosely fitted in the corresponding large diameter hole. A resin molded body with a hinge part, wherein the resin molded body with a hinge portion has a product shape that can be rotated by moving and fitting from the inside of the small diameter hole into the inside of the small diameter hole. 2. The resin molded body with a hinge portion according to claim 1, wherein the large diameter hole and the small diameter hole are formed in bulging portions protruding from both side portions of the main body portion. 3. A locking portion that allows the main body portion and the movable portion to engage with each other when the movable portion is rotated and overlapped on the main body portion side via the hinge portion in the product shape state. The resin molded body with a hinge part according to claim 1, wherein one of the engaging part and the engaging part is integrally formed. 4. The hinged resin molded body according to claim 1, wherein the resin molded body is a support frame that is attached to a door panel side of a vehicle and holds a door glass slidably.