JPS6245779Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transfer drive device for a press.

Transfer's advanced return process is
Four operations are repeated: advance, stop, return, and stop.

Conventionally, due to the structure of the transfer drive mechanism, the stop during the transfer advance/return stroke was
The rotation angle of the press crankshaft was approximately 60° or less. In so-called three-dimensional transfer presses, clamp/unclamp operations and lift/down operations are performed during this stoppage, so the stoppage period tends to be insufficient, which is particularly a problem in high-speed transfer presses.

The purpose of the present invention is to provide a transfer drive device that can eliminate this drawback, extend the stop period in the advance return stroke of the transfer, and stably perform other operations of the transfer. . Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 to 3, a drive pinion 1 is fixed to a shaft 1a connected to a drive shaft (not shown) of a press, and rotates in conjunction with the press. The idle gear 2 is rotatably provided on a shaft 2a fixed to the machine body, and meshes with a drive pinion 1, and also meshes with a gear 4 rotatably provided on an eccentric shaft 3 fixed to the machine body. A gear 7 is rotatably provided on the eccentric portion 3a of the eccentric shaft 3. A plate 5 and a plate 6 are fixed to opposing surfaces of the gear 4 and the gear 7, respectively. A pin 24 is provided on the plate 5, and a pin 23 is provided on the plate 6, respectively, protruding upright toward the other side, and these are connected by a link 22, so that the gear 4 and the gear 7
and are connected as a so-called quick return mechanism. That is, in FIG. 3, gear 4 and gear 7 rotate counterclockwise, and the pin 24 of gear 4 is connected by a link 22 so that the pin 24 of gear 4 rotates at a phase that is a required angle ahead of the pin 23 of gear 7. ing. Gear 7 meshes with gear 8. The gear 8 is rotatably provided on a shaft 8a fixed to the body, and the gear 8 rotatably holds the crankshaft 11. A sun gear 9 fixed concentrically to the shaft 8a and a planetary gear 10 fixed to one end of the crankshaft 11 mesh with each other. crankshaft 11
A slider 12 is fitted into the eccentric pin portion 21 of the shaft 8a, and the slider 12 is inserted into the groove 1 provided in the radial direction on the lower surface of the arm 13 rotatably provided on the extension of the shaft 8a.
Complies with 3a. A pin 14 is fixed to the upper surface of the arm 13, and a slider 15 is fitted into it. The slider 15 fits into a groove 16a provided on the lower surface of the slider 16 in a direction perpendicular to the plane of the drawing. The slider 16 is guided by a piston rod 17 fixed to another slider 18 and is movable in the advance and return directions of a feed bar (not shown). The slider 18 is slidably guided in the advance/return direction of the feed bar by a guide rod 19 fixed to the machine body. A pin 20 that fits into a hole in the feed bar is provided on the top surface of the slider 18 so as to be movable in a direction perpendicular to the advance/return direction of the feed bar, that is, in the clamp/unclamp direction of the feed bar.

Next, the operation will be described with reference to FIGS. 4 and 5. In FIG. 4, a circle 24a represents the trajectory of the center of the pin 24 that moves together with the gear 4, and a circle 23a represents the trajectory of the center of the pin 23 that moves together with the gear 7.
If the rotation angle of gear 4 is α and the rotation angle of gear 7 is β, then if the input to this quick return mechanism is α, the output will be β. Set the eccentric direction of eccentric shaft 3 to 0.
If α is taken as a degree every 10 degrees, and β is calculated from the corresponding points 1, 2, etc., and plotted together with the value of (β-α), the result will be as shown on the left side of Fig. 5. α
= 30°, β≒40° and β−α≒10°, that is,
Gear 7 will rotate about 10 degrees more than gear 4. The stroke amount S' of the feed bar with respect to the rotation angle β of the gear 7 is obtained by correcting the stroke amount S without this quick return mechanism by (β - α), and this is illustrated as shown on the right side of Fig. 5. Become. In other words, it can be seen that while the conventional feed bar was stopped while the gear 7 rotated 30 degrees, this quick return mechanism stopped the feed bar while the gear 7 rotated 40 degrees.

As is clear from the above explanation, by providing the quick return mechanism according to the present invention in the drive mechanism of the transfer device, the advance speed of the transfer can be improved.
Since the stop period in the return stroke can be increased by about 33%, the clamp/unclamp operation and lift-down operation of the feed bar can be stably performed during that period, and the practical effects and advantages are extremely large.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional side view of the transfer device;
The figure is a sectional side view of the main part of the present invention, Figure 3 is a partial top view of the main part, Figures 4 and 5 are the angle of the quick return mechanism,
Stroke explanatory diagram, 1 is a drive pinion, 2 is an idle gear, 3 is an eccentric shaft, 4 is a gear, 5 is a plate, 6 is a plate, 7 is a gear, 8 is a gear, 9 is a sun gear,
10 is a planetary gear, 11 is a crankshaft, 12 is a slider, 13 is an arm, 14 is a pin, 15 is a slider, 16 is a slider, 17 is a piston rod,
18 is a slider, 19 is a guide rod, 20 is a pin, 21 is an eccentric pin portion, 22 is a link, 23 is a pin, and 24 is a pin.

Claims (1)

[Scope of utility model registration request] A gear 4 is rotatably supported on an eccentric shaft 3 fixed to the machine body and driven from the press's rotating shaft in the drive mechanism of the transfer device that is driven by the rotating shaft of the press and moves the feed bar in advance return motion. , a gear 7 rotatably supported on the eccentric portion of the eccentric shaft 3 is provided, and the gear 4 and the gear 7 are connected to each other.
A pin 24 and a pin 23 are provided on the opposite surface of the gear 4 to protrude toward the other side, respectively, and the pin 24 of the gear 4 is connected to the gear 7.
A transfer drive device characterized in that a quick return mechanism is provided in which a pin 24 and a pin 23 are connected by a link 22 so that the pin 24 and the pin 23 rotate at a phase that is a predetermined angle ahead of the pin 23.