JP2003117741A - Assembly method for molded product with transmission parts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assembly method for a molded product with a transmission part that can maintain stable performance without requiring an exclusive device such as an aligning unit, a conveying unit or catching equipment. SOLUTION: A plurality of members 13, 14 are molded by a molding die 10 having relatively slidable sliding dies 15, 16, and the sliding dies 15, 16 are slidingly moved by a prescribed space to open a space between the members 13, 14, thus securing a built-in space for an intermediate member 33. The intermediate member 33 is supplied into the built-in space, and the molded members 13, 14 and the intermediate member 33 are assembled as a transmission part 30 on the molding die 10. Finally, the transmission part 30 is assembled as it is in the assembled state directly into a built-in device 34.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling a molded article having a transmission component, and more particularly, to assembling a transmission component comprising a plurality of members. A molding having a transmission component suitable for application to assembling of a gear unit of a gear motor or the like, in which after being performed on a molded molding die, the transmission component is incorporated in an assembling apparatus in an assembled state. It relates to a method of assembling a product. 2. Description of the Related Art As shown in FIG. 7, a conventional gear train 4 to which a plurality of resin gears are assembled is assembled by a first gear 1, a second gear 2 and a third gear 3 Are molded by individual injection molding machines 5, 6 and 7, respectively, and stocked. Then, it is transported to the assembling step, and is assembled by manually or using a dedicated robot and arranging it at a predetermined position on the dedicated assembling jig 8. A first gear 1, a second gear 2 and a third gear 3
Are the large gears 1a, 2a, 3a and the small gears 1b, 2b,
3b is formed by integrally molding a synthetic resin.
The small gear 1b of the gear 1, the large gear 3a of the third gear 3, and the third
The small gear 3b of the gear 3 and the large gear 2a of the second gear 2 mesh with each other and are combined to form a gear train 4. The assembling jig 8 includes a first movable base 9 and a second movable base 10 which are slidable in a direction approaching or moving away from each other. And a fixed base 11 disposed therebetween. First
The movable table 9 has a storage chamber 9a for storing the large gear 1a of the first gear 1. In addition, the second movable base 10 includes:
A storage chamber 10a for storing the small gear 2b of the second gear 2 is formed. In addition, a support shaft 11 a that rotatably supports the third gear 3 is provided at the tip of the fixed base 11. In the assembling by a dedicated robot, the stocked first gear 1, second gear 2 and third gear 3 are aligned in a predetermined direction by an aligning device, and then assembled by a transfer device. The first movable table 9 and the second movable table 10 are conveyed to the jig 8 and slid in a direction away from each other to supply the first movable table 9 and the second movable table 10 to a predetermined position of the assembling jig 8 in which an assembling space is secured. That is, the first gear 1, the second gear 2 and the third gear 3 are held one by one by the chucking equipment, and the large gear 1a of the first gear 1 is stored in the storage chamber 9a. The small gear 2b of the second gear 2 is stored in the storage chamber 10a.
To be stored. After the center hole of the third gear 3 is rotatably fitted to the support shaft 11a, the first movable table 9 and the second movable table 10 are slid toward the fixed table 11 in the direction of the arrow. Thereby, the first gear 1, the second gear 2 and the third gear
The gear train 4 has been assembled by meshing the gears 3 with each other. [0006] When the above-mentioned conventional gear train is assembled manually, it is difficult to visually discriminate the type of each gear if the gears are small and precise. In addition, an assembly error may occur, making it difficult to grasp during alignment, transport, and chucking, resulting in poor workability,
There are problems that it is difficult to improve production efficiency and that a large labor cost is required. In addition, in the assembly by a robot, an alignment unit, a transport unit and a chucking facility are individually required for each type of gear to be assembled, and a dedicated assembling jig is required for each gear train to be assembled. There is a problem that not only an installation space is required for installation, but also a large facility cost is required.
Further, the alignment unit, the transport unit, the chucking equipment, and the dedicated assembling jig have a drawback in that a dedicated one must be manufactured for each gear, or a complicated adjustment must be made according to the gear. [0007] Further, since the assembling is performed through many steps, there is a problem that the gear is contaminated, dust adheres, and the gear is damaged during handling of the gear. There is a problem that it is difficult to secure stable performance. SUMMARY OF THE INVENTION In view of the above problems, the present invention does not require a dedicated device such as an alignment unit, a transfer unit, and a chucking facility, and assembles a molded product having a transmission component capable of maintaining stable performance. It is intended to provide a way. A method of assembling a molded article having a transmission component according to the present invention is an assembling method of a molded article having a transmission component, comprising: an upper die and a lower die of a molding die. After molding a plurality of members by a molding die including a slide die relatively slidable in a horizontal direction perpendicular to the opening / closing direction of the slide die, the slide die is relatively slid by a predetermined interval. Moving, disposing an intermediate member separately formed between the plurality of members, and sliding the slide mold relatively to an original position, thereby transmitting parts including the plurality of members and the intermediate member. Is mounted on the molding die, and further, the transmission component is mounted at a predetermined position in a mounting device with the transmission component being mounted. According to the method of assembling a molded article having the transmission component having the above-described configuration, a plurality of members to be assembled are formed in a molding die, and the slide die is slid relatively horizontally to move the plurality of members. An intermediate member separately formed is arranged between the members. Then, by sliding the slide mold relatively to the original position, a transmission component including a plurality of members is assembled on the mold. Next, since the transmission component is mounted at a predetermined position in the mounting device while being mounted, the molding process and the mounting process of the molded product can be performed in a series of continuous operations. Therefore, it is possible to eliminate the need for a special device such as a special alignment unit, a transfer unit, and a chucking facility. Moreover, the installation space and installation cost of the apparatus can be significantly reduced. Also, since the gear train is assembled immediately after molding without going through a complicated assembling process, and further, the assembling is performed in the assembling device of the transmission component. Damage and the like can be prevented. Therefore, the failure rate of the assembled product can be significantly reduced, and a highly reliable gear train having stable rotation performance can be easily produced. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a method for assembling a molded article having a transmission part according to the present invention will be described in detail below with reference to FIGS. FIG. 1 shows a method of assembling a molded product having a transmission component according to the present invention, and is a partial cross-sectional view of a molding die showing a state where an upper die is opened after molding a first gear and a second gear. FIG. 2 is a partial cross-sectional view showing a state in which the slide mold is slid in the lateral direction in FIG. 1, and FIG. 3 is a cross-sectional view of a main part showing a state in which the mold is opened in FIG. 4 is a cross-sectional view of a main part of FIG. 3 showing a sliding state in which a slide mold is separated, and FIG. 5 is a cross-sectional view of a main part showing a state of assembling a gear train in FIG. FIG. 6 is a process diagram showing a process of assembling into the gear case in FIG. First, the configuration of a molding die 10 for forming a gear and assembling a gear train will be described. As shown in FIG. 1, the molding die 10 is composed of an upper die 11 and a lower die 12, and is a set-up die in which the first gear 13 and the second gear 14 can be injection-molded simultaneously. . Lower mold 12
Are a first slide mold 15 and a second slide mold 16
And an intermediate mold 17, and are respectively provided on the base 18. The first slide mold 15 and the intermediate mold 17 are configured to be slidable in the horizontal direction with respect to the base 18, and the second slide mold 16 is fixed to the base 18. The first slide mold 15 has a first gear 13
The second slide die 16 is provided with a cavity 15a for forming the second gear 14, and the cavity 15a for forming the second gear 14 is provided in the second slide die 16. The first slide die 15 is provided with a mounting hole 15b with a step in the slide movement direction, and the screw 19 is loosely inserted into the mounting hole 15b in a state where the screw head 19a is stored in the large diameter portion of the mounting hole 15b. The intermediate mold 17 and the first slide mold 15 are connected to each other by being fitted and screwed to the intermediate mold 17. Also, the bottom 15c of the large diameter portion and the screw head 19a
A gap C0 is provided between the spring chamber 1 and the spring chamber 1 on the surface of the first slide mold 15 facing the intermediate mold 17.
5d is provided. In the spring chamber 15d, a compression spring 20 is disposed between the compression mold 20 and the intermediate mold 17, and an urging force is applied in a direction for always separating the first slide mold 15 and the intermediate mold 17. Further, a cylinder shaft 22 of a cylinder device 21 is connected to the first slide mold 15, and by operating the cylinder device 21, the first slide mold 15 is placed on the base 18 in the figure. Slide left and right. The intermediate mold 17 is provided with a small-diameter support shaft 17a at the tip, and is fitted in a center hole 33a of a third gear 33 described later to rotatably support the third gear 33. When the first gear 13 and the second gear 14 are injection-molded, the cylinder shaft 22 of the cylinder device 21 is extended to press the first slide die 15, and the first slide die 15, the intermediate die The mold 17 and the second slide mold 16 are positioned in close contact with each other. Then, the upper mold 11
Is lowered, the mold is clamped, and injection molding is performed. At this time, the center distance of each of the first gear 13, the second gear 14, and the support shaft 17a of the intermediate mold 17 in the closely contacted state is the same as the center distance when the gear train 30 is configured. Is set. As shown in FIG. 2, when the cylinder device 21 is operated to retract the cylinder shaft 22, the first slide die 15 slides on the base 18 in the direction of arrow C. Then, the screw head 19 a contacts the bottom 15 c of the large diameter portion, and the intermediate mold 17 is pulled via the screw 19.
Thus, the first slide die 15 and the intermediate die 1 are slid on the base 18 in the direction of arrow C and separated from each other.
7, and a gap C2 between the intermediate mold 17 and the second slide mold 16. That is, as shown in FIGS. 3 to 6, according to the method of assembling a molded product having the transmission component of the present embodiment, the opening and closing directions of the upper die 11 and the lower die 12 of the molding die 10 are orthogonal to each other. Forming die 10 including slide dies 15, 16 slidable relatively in the horizontal direction.
Thus, the members 13 and 14 are formed. Thereafter, the slide dies 15, 16 are slid by a predetermined distance, the intermediate member 33 is disposed between the members 13, 14, and then the slide dies 15, 16 are slid to the original positions. Thus, the transmission component 30 including the plurality of members 13, 14, and 33 is assembled on the molding die 10, and the transmission component 30 is still assembled in the transmission component installation device 34. It is a method of assembling. The operation of the present embodiment will be described. 3 to 6 are process diagrams showing a process of manufacturing a gear train 30 including three gears. As shown in FIG.
0, the first gear 13, the second gear 14, and the third gear 33 are the large gears 13a, 14a, 33a and the small gear 1 respectively.
3b, 14b, and 33b are integrally formed of synthetic resin, and the small gear 13b of the first gear 13, the large gear 33a of the third gear 33, the small gear 33b of the third gear 33, and the second gear 1 are formed.
The four large gears 14a mesh with each other and are combined to form a gear train 30. The procedure from molding to assembling of each gear of the gear train 30 will be described. As shown in FIGS. 1 and 3, the molding die 10 is set in the injection molding apparatus, the cylinder shaft 22 of the cylinder device 21 is extended, and the first slide die 15 is pressed. The intermediate mold 17 and the second slide mold 16 are positioned in close contact with each other. Thereafter, the upper mold 11 is lowered to clamp the upper mold 11 and the lower mold 12, and the synthetic resin is injected into the cavities 15a and 16a, and the first gear 13 and the second gear 1 are injected.
Then, the upper mold 11 is raised in the direction of the arrow, and the molding die 10 is opened. Next, as shown in FIGS. 2 and 4, when the cylinder device 21 is operated and the cylinder shaft 22 is retracted,
The first slide die 15 slides on the base 18 in the direction of arrow C. Then, the screw head 19a comes into contact with the bottom portion 15c of the large diameter portion, and the intermediate mold 17 is pulled via the screw 19 to slide on the base 18 in the direction of arrow C. Accordingly, the first slide mold 15 and the intermediate mold 17 are relatively moved with respect to the second slide mold 16, and the gap C1 between the first slide mold 15 and the intermediate mold 17 and the intermediate mold are provided. A gap C2 between the mold 17 and the second slide mold 16
Is formed. Thereby, the first gear 13 and the second gear 1
4 are separated from each other to form a mounting space for the third gear 33,
The center hole of the third gear 33 separately formed by the injection molding device is rotatably fitted to the support shaft 17 a on the intermediate mold 17. Next, as shown in FIGS. 5 and 6, the first slide mold 15 and the intermediate mold 17 are respectively slid in the direction of the arrow, and are moved to the original positions in close contact with the intermediate mold 17. Due to this sliding movement, the small gear 13 b of the first gear 13 and the large gear 33 a of the third gear 33, and the small gear 33 b of the third gear 33 and the large gear 14 a of the second gear 14 mesh with each other to form a gear train 30. Is assembled on the molding die 10. That is, the third gear 33 is rotatably fitted to the support shaft 17a, and the first gear 13 and the third gear 33 approach the second gear 14 from the left side in FIG. Mesh. Therefore, even if the gear train phases in the rotation direction of the gears do not match, the third gear 33 rotates and the phase is automatically adjusted. Therefore, the gear trains are smoothly assembled without interference, and the gears are not damaged or damaged. The cavities 15 provided in the first slide mold 15 and the second slide mold 16 are provided.
Needless to say, the phases of the rotation directions a and 16a are set such that the third gear 33 can be engaged at the same time. Finally, as shown in FIG.
The gear train 30 assembled above includes the first gear 13, the third gear
While the gear 33 and the second gear 14 are assembled,
Dies 15, 16, 17 by a transfer jig such as an air chuck
It is picked up from above and is directly installed in the gear case 34 which is an installation device of the transmission component. In addition, with respect to the taking-out means of the gear train 30, the plurality of projecting pins (not shown) provided on the molding die 10 protrude upward in the figure, and
The gear case 34 can be moved onto the gear train 30 and assembled. As described above, according to the method of assembling a molded article having a transmission component according to the present invention, the member to be assembled is formed by the molding die and the slide die is moved to move the member. An intermediate member is disposed therebetween, and a transmission component composed of a plurality of members is assembled on the molding die. Then, the transmission component is assembled in an assembling apparatus of the transmission component in an assembled state. Therefore, the molding and assembling steps of the molded product can be continuously performed on the same mold, and a special device such as a special alignment unit, a transport unit, and a chucking facility can be eliminated. Therefore, the installation space and installation cost of the manufacturing apparatus and the assembling apparatus can be significantly reduced. Further, since the gear train is assembled immediately after molding without going through a complicated assembling process, and further, the assembling process is directly assembled into the assembling device of the transmission component, so that the assembling process can be simplified. Accordingly, it is possible to prevent the gear from being contaminated during the process, to adhere dust, and to prevent the gear itself from being damaged or damaged, thereby reducing the defective rate of the assembled product. In addition, a gear train having stable rotation performance can be easily and inexpensively manufactured.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a method of assembling a molded product having a transmission component according to the present invention, and shows a state in which an upper mold is opened after molding a first gear and a second gear. It is a partial sectional view. FIG. 2 is a partial cross-sectional view showing a state in which a slide mold is slid in a lateral direction in FIG. FIG. 3 is a cross-sectional view of a main part showing a state in which the mold is opened in FIG. 1; FIG. 4 is a cross-sectional view of a main part of FIG. 3, showing a slide state in which a slide mold is separated. FIG. 5 is a cross-sectional view of a main part of FIG. 4, showing a state where the gear train is assembled. FIG. 6 is a process diagram showing a process of assembling into a gear case in FIG. 5; FIG. 7 is a process diagram showing a conventional method of assembling a molded article having a transmission component, and showing an assembling step of a gear train. [Description of Signs] 10 Molding die 11 Upper die 12 Lower die 13 First gear (Molded member) 14 Second gear (Molded member) 15 First slide die 16 Second slide die 17 Middle metal Mold 19 Screw 20 Elastic member 30 Gear train (transmission part) 33 Third gear (intermediate member) 34 Gear case (embedded device)

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Junichi Hamamoto             Yazaki, 206-1 Nunobikihara, Haibara-cho, Haibara-gun, Shizuoka Prefecture             Parts Co., Ltd. (72) Inventor Shogo Matsuoka             Yazaki, 206-1 Nunobikihara, Haibara-cho, Haibara-gun, Shizuoka Prefecture             Parts Co., Ltd. (72) Inventor Inoue et al.             1-7-1 Yokoi, Shimada City, Shizuoka Prefecture Yazaki Kei             Kiki Co., Ltd. (72) Inventor Kiyofumi Uchida             1-7-1 Yokoi, Shimada City, Shizuoka Prefecture Yazaki Kei             Kiki Co., Ltd. (72) Inventor Tomoaki Murayama             1-7-1 Yokoi, Shimada City, Shizuoka Prefecture Yazaki Kei             Kiki Co., Ltd. F-term (reference) 3C030 CA00                 3J009 DA13 EA04 EA05 EA11 EA23                       EA32 EB06 EC02 FA16 FA21

Claims (1)

Claims 1. A method for assembling a molded article having a transmission component, wherein the method is relatively slidable in a horizontal direction orthogonal to an opening and closing direction of an upper mold and a lower mold of a molding die. After forming a plurality of members by a forming die including a slide die, the slide die is relatively slid by a predetermined interval, and an intermediate member separately formed between the plurality of members. Is arranged, and the slide die is relatively slid to the original position, thereby assembling the transmission component including the plurality of members and the intermediate member on the molding die, and further including the transmission component. The method for assembling a molded article having a transmission component, wherein the transmission component is assembled at a predetermined position in an installation device for the transmission component while the transmission component is assembled.