JPS6119377B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for supplying wheel train parts used in automatic assembly work and the like. When assembling gear parts that mesh with each other by inserting them into a shaft hole, etc., it is necessary to insert and assemble the gear parts in a state where the teeth of the gear parts mesh with the teeth of the other gear, especially in automatic assembly equipment. It is essential that the teeth of the inserted part be automatically engaged with the mating gear when assembled.

The present invention provides a method of meshing and assembling gear parts that is extremely effective in achieving the above object, particularly in the automatic assembly of small wheel train parts.

As shown in Fig. 1, the gear parts 1, 2, and 3 of the gear train are assembled with each gear part meshing between the lower plate 4 and the upper plate 5, and the gear parts 1, 2, and 3 of the gear train are assembled with each gear meshing between the lower plate 4 and the upper plate 5. It is necessary that each gear part is inserted into each of the shaft holes 4a, 4b, 4c of the lower plate 4, and the parts are assembled with the teeth meshing.

FIG. 2 shows an embodiment of the present invention, in which a gear is placed in a shaft hole 10a of a lower plate 10 placed on a jig (not shown) in mesh with a gear 11 that has already been inserted into another shaft hole. A method for inserting the component 12 will be described.

The gear part 12 is fixed to a holding device 13 having a shaft center guide part 13a that holds the shaft center position 12a by a suction means 14 having an air suction hole, and is conveyed from a predetermined position and lowered at a predetermined shaft center position, and is moved to the shaft hole of the lower plate. 10a
The lower shaft 12b is slightly inserted, and the fixation of the holding device 13 is released when the lower surface of the toothed portion 12c is at a predetermined position near the upper surface of the toothed portion 11c of the gear 11. At this time tooth part 1
If the gear parts 1c and the tooth part 12c are in a meshing position, the gear part 12 will be lowered by its own weight to the final lowered position and assembled, but if the crests of the teeth are in contact with each other even slightly, the gear part 12 will not remain in that state. It does not become engaged. Therefore, the fixation of the gear part 12 is released by the holding device 13, and air is injected from the nozzles 15, 15 provided on the holding device 13 while the holding device is stopped at the open position. By injecting this air in the circumferential direction to the outer periphery of the gear part 12 (FIG. 2a), the tooth portion 12c is rotated, and the tooth portion 11 that meshes with the tooth portion 12c is rotated.
When the gear part 12 reaches a position in which it is in mesh with C, the gear part 12 is lowered by its own weight and assembled in a mesh state. The holding device 13 is raised and transported again to the initial position. It is also possible to use a collect chuck system for the fixing device having the axial guide portion of the holding device 13. By directing air from the nozzle tip in the circumferential direction of the teeth and slightly downward, it is possible to help the weight fall after engagement. When rotating the gear part 12, the lower shaft 12b is rotated with the toothed part 12c placed on the upper surface of the toothed part 11c.
is inserted into the shaft hole 10a, and the upper shaft part 12a is held by the shaft center guide part 13a, and the rotation center is supported by the upper and lower shafts. When the gear 17 is assembled, it may not be necessary to maintain the axial center position of the upper shaft portion after it is released from the holding device.

As explained above, in the present invention, a gear component is fixed to a holding device with the axis position as a reference, and after being inserted into a predetermined position, the fixation of the gear component is released and air is injected from a nozzle provided in the holding device. At the very least, the gear parts are rotated and assembled in a meshing state.It is particularly effective in assembling small gear parts such as watch train parts, and has a simple structure that makes it suitable for use in automatic assembly work, etc. The effect is great.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an embodiment of the invention to explain the combination of wheel train parts, and FIGS. 2 and 3 are cross-sectional views of essential parts of the embodiment of the present invention. 10a...Shaft hole, 12...Gear parts, 13...
Holding device, 15...nozzle.

Claims (1)

[Claims] 1. A method for supplying gear parts in mesh with other gear parts in the assembly work of wheel train parts,
The lower end of the insertion part of a predetermined gear part is fitted into a predetermined shaft hole or shaft by a holding device that holds, fixes and transports the axial center position of the gear part, and the teeth of the gear are already assembled. After the predetermined gear part is lowered until it is located above the teeth of the other gear, the fixation of the predetermined gear part by the holding device is released and the predetermined gear part is supported so as to stand upright, and the predetermined gear part is A method for meshing and assembling gear parts, in which the gear parts are rotated by injecting air in the circumferential direction to the outer periphery of the gear parts, and the gear parts are meshed with other already assembled gear parts and fixed at a final lowered position.