JPS6111695B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clamp and lift drive in a transfer device. The transfer device is a feeding device for so-called transfer processing of a press.

Conventionally, this type of device has been disclosed in Japanese Patent Application Laid-Open No. 52-22182, ``Workpiece Transfer Device in Three-Dimensional Transfer Press Machine,'' filed by the same applicant. According to this, the trajectory of the eccentric point of the internal gear and the planetary gear that meshes with it is used in two perpendicular directions, one is used for clamping operation, the other is converted into rotational motion, and a crank mechanism is used to lift the gear. It is used for operation. Both movements were driven by axial sliding and rotational movement of the same shaft.
However, as products to be pressed are produced in a wide variety and in small quantities, there are a variety of products, and in order to obtain the optimum feeding condition for each product, it may be necessary to change the lift amount.

In this regard, with conventional systems, the crank mechanism and its related parts must be replaced.
As mentioned above, since the clamp drive shaft and the lift drive shaft are the same, there have been various difficulties in dealing with changes in the lift amount, such as the fact that the members related to the clamp drive are also affected by this. The present invention has been made to solve the above-mentioned problems. below,
The drawings, which are one embodiment of the present invention, will be explained in detail.

``In Figures 1 and 2, the arm 3 is rotatably provided on the fuselage, and the pinion part 3 of the arm 3
A is engaged with a rack 4 that reciprocates in synchronization with the press. A planetary gear 2 is rotatably held in the arm 3 and meshes with an internal gear 1 fixed to the fuselage. An eccentric pin 5 is fixed to the planetary gear 2. internal gear 1
The gear ratio between this and the planetary gear 2 is 4:1. The reason for this is to make the trajectory of the eccentric pin 5 move in two directions at right angles (P, Q in FIG. 1). That is, when the arm 3 is rotated approximately 150 degrees, the eccentric pin 5 will draw a trajectory of P and Q.

The slider 7 is guided by guide rods 9, 9 which are fixed at both ends to the body, so that the slider 7 can freely slide. A rack 6 is slidably held on the slider 7 (in a direction perpendicular to the reciprocating direction of the slider 7). The rack 6 is rotatably held by a slider 7 and meshes with a pinion 8, and an eccentric pin 5 is fitted into a hole in the back of the rack 6. When the eccentric pin 5 draws a trajectory P, the slide 7 moves horizontally (clamping/unclamping movement) guided by the guide rods 9, 9, and when the eccentric pin 5 draws a trajectory Q, the slide 7 moves horizontally (clamping/unclamping). 6 is guided by a slider 7 and moves in the longitudinal direction of the rack 6. While the rack 6 is moving, the slider 7 will stop.
The pinion 8 meshing with the rack 6 rotates.
(Lift-down motion) In FIGS. 3 and 4, a spline is provided on the inner diameter portion of the pinion 8, and the spline shaft 10 is fitted to this spline portion. The spline shaft 10 is connected to one end of the lift shaft 11, and an eccentric pin 17 is fixed to the other end of the lift shaft 11.
The spline shaft 10 and the lift shaft 11 are rotatably held by the machine body. One end of an arm 18 is connected to the eccentric pin 17.
The other end is connected to a rack 19 which is held movably up and down by the machine body. (Figure 6) Rack 19
is a spline shaft 2 rotatably held in the fuselage.
It meshes with pinion 20 of No. 1. pinion 20
is fixed to the spline shaft 21.

In FIGS. 4 and 5, the spline shaft 21
A pinion 22 rotatably held within the movable bodies 13, 13 is fitted into the movable bodies 13, 13. That is, the spline on the inner diameter of the pinion 22 meshes with the spline on the spline shaft 21, and the pinion 22
is slidable in the longitudinal direction of the spline shaft 21. The pinion 22 meshes with a rack 23 held within the movable body 13 so as to be movable up and down.
A feed bar receiver 24 is fixed to the upper part of the rack 23, and a feed bar 25 is fitted to this.
That is, the above is a feed bar lift down structure.

3 and 4, one end of the link 12 is connected to the slider 7, and the other end is connected to the moving body 1.
3 and 13 are connected. Mobile body 13,
Tuning racks 15, 15 are connected to the gear 13, respectively, and each rack 15, 15 has a mechanism that meshes with both sides of a pinion 16, which is rotatably held in the machine body. That is, when one movable body 13 moves by the link 12, the other movable body 13 moves via the rack 15, pinion 16, and rack 15.
move in sync and in opposite directions. This moving body 1
Feed bar 25, 25 by the movement of 3, 13
will perform clamp/unclamp operations.

The effect will be explained below. Figures 1 and 2
In the figure, when the arm 3 reciprocates about 150 degrees by the rack 4 connected to the press and reciprocated, the eccentric pin 5 is moved to P, P, via the planetary gear mechanism.
Draw the trajectory of Q.

The slider 7 moves according to a trajectory P, and the pinion 8 rotates according to a trajectory Q.

3, 4 and 5, when the slider 7 moves, the links 12, racks 15, 15,
The movable bodies 13, 13 move in opposite directions via the pinion 16, giving clamping/unclamping motion to the feed bars 25, 25.

When the pinion 8 rotates, the spline shaft 10,
The feed bars 25, 25 perform a lift-down motion via the lift shaft 11, eccentric pin 17, arm 18, rack 19, pinion 20, spline shaft 21, pinion 22, rack 23, and feed bar receiver 24.

Here, when the eccentric pin 5 repeatedly reciprocates and draws trajectories P and Q, the feed bars 25 and 25 repeatedly perform the movements of clamping, lifting, down, and unclamping.

Since the present invention has the above-described configuration, changing the above-mentioned lift amount can be done by changing the eccentricity of the eccentric pin 17, for example, by simply replacing the member of this part. Therefore, it was possible to provide a clamp and lift device for a transfer device that can handle a wide variety of low-volume production.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the planetary gear mechanism, Fig. 2 is a longitudinal sectional view of the planetary gear mechanism, and Fig. 3 is A--A in Fig. 2.
A sectional view, FIG. 4 is a vertical sectional view of the clamp lift mechanism, FIG. 5 is a cross sectional view of the clamp lift mechanism, and FIG. 6 is an explanation of the connection state of the eccentric pin, arm, rack, and pinion in FIG. 4. Figure, 1 is internal gear, 2 is planetary gear, 3
is an arm, 4 is a rack, 5 is an eccentric pin, 6 is a rack, 7 is a slider, 8 is a pinion, 9 is a guide rod, 10 is a spline shaft, 11 is a lift shaft, 1
2 is a link, 13 is a moving body, 14 is a wheel, 15 is a rack, 16 is a pinion, 17 is an eccentric pin, 18
is arm, 19 is rack, 20 is pinion, 21
is a spline shaft, 22 is a pinion, 23 is a rack, 24 is a feed bar holder, 25 is a feed bar,
26 is a pin.

Claims (1)

[Claims] 1 Internal gear 1 fixed to the fuselage,
The gear ratio of the planetary gear 2 that meshes with this is 4:
1 and an eccentric pin 5 fixed to the planetary gear 2.
and the slider 7 slidably guided by the fuselage,
A rack 6 is slidably guided by the slider 7 in a direction perpendicular to the reciprocating linear motion of the slider 7 and is locked to the eccentric pin 5, and a rack 6 is rotatably held by the slider 7 and is engaged with the rack 6. pinion 3
, means for transmitting the reciprocating linear motion of the slider 7 as a clamp-unclamp motion of the feed bar, and separate means for transmitting the rotational motion of the pinion 8 as a lift-down motion of the feed bar via an eccentric pin 17 whose eccentricity is variable. A clamp and lift drive device for a transfer device, comprising: