JPS6030989Y2 - Feed bar clamp/unclamp and lift/down device in transfer press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clamp/unclamp and lift/down device for a feed bar in a transfer press.

Conventionally, as this type of device, there has been a device disclosed in Japanese Patent Application Laid-Open No. 52-22182 by the same applicant.

Since the clamp/unclamp mechanism and the drive mechanism of the lift/down mechanism are housed in the same unit box, the unit box itself becomes large, which becomes an obstacle to taking out the divided feed bar.

In other words, in order to secure a space from which the divided feed bars can be taken out, the frame of the press must be made larger and the dimensions between the columns must be increased.

This invention makes the unit box compact,
This was done to maximize the space for taking out the feed bar.

In other words, the present invention was developed in order to reduce the size between the columns and the frame of the press in relation to the necessary space for taking out the feed bar.

In FIG. 1, the feed bar 26 is divided into a take-out portion and a non-take-out portion, which are removably connected with pins, and are connected to the slider 25 of the transfer unit 24 for advance return movement.

On the other hand, a unit box 27 containing a clamp/unclamp and lift/down mechanism and a drive box 21 for the clamp/unclamp mechanism are assembled to the frame 3.

In FIG. 2, a lift/down cam 1 is provided on one side of the slide of the press.

The lever 4 is rotatably held on the frame 3 of the press,
A roller 2 is rotatably held at one end of the lever 4, and the roller 2 corresponds to the lift/down cam 1.

The other end of the lever 4 is connected to a rod 5.

The rack 6 is connected to the lower end of the rod 5 and meshes with a drive pinion 7 rotatably held in a drive pinion box 38 fixed to the frame.

The drive pinion 7 has a spline hole into which the drive spline shaft 8 is inserted.

(FIG. 5) The crank 9 is fixed to the drive spline shaft 8, and the eccentric portion fits into a long groove provided in the feed bar receiver 10, as shown in FIG.

The feed bar receiver 10 is held by a carrier 13 so as to be vertically slidable.

The wheels 14 are rotatably held by the carrier 13, and are mounted in a unit box 27 provided on the side of the frame 3 of the press.
The structure is such that the train runs on rails that are fixed to the rail.

One end of the spline shaft 11.11' is connected to the crank 9.9'.
The other end is inserted into the spline hole of the equalizer joint 12.

The equalizer joint 12 is rotatably held by a unit box 27.

On the other hand, a clamp/unclamp cam 28 is provided on the other surface of the slide.

The lever 4' is rotatably provided on the frame 3 of the press, and a roller 2' is rotatably held at one end of the lever 4', and the roller 2' corresponds to the clamp/unclamp cam 28. ing.

The other end of the lever 4' is connected to a rod 23.

The rack 6' connected to the lower part of the rod 23 is connected to the pinion shaft 1 which is rotatably held in the drive box 21.
It meshes with 9.

Details of the pinion shaft 19 portion are shown in FIG.

The arm 18 is fixed to the pinion shaft 19 and rotatably connected to the lever 17 by an eccentric drive pin 37 provided at one end.

The other end of the drive lever 17 is connected to a carrier 13'.

A rank 15.15' is connected to the inside of the carrier 13.13', and the racks 15, 15' face each other and mesh with the central equalizer pinion 16.

The equalizer pinion 16 is rotatably held in a unit box 27.

In addition, the feed bar receiver 10.10' moves in the opposite direction.
incorporates a pair of feed bars 26,26.

Next, in Fig. 6, the clamp/unclamp cam 2
8 is held movably in the horizontal direction and is fixed to the piston rod of the cylinder.

The clamp/uncrank cam 28 is for two-dimensional feeding and 3
It has a pair of cam surfaces for dimensional feeding and is used by switching alternately.

Two-dimensional feeding is a method of feeding blank materials, etc. in one plane.
Three-dimensional feeding is a feeding method that adds vertical movement to this, and both methods are used depending on the shape of the product.

The timing of clamping and unclamping (with respect to the rotation of the press) is different between two-dimensional feeding and three-dimensional feeding.

In general, two-dimensional feeding allows longer time for clamping and unclamping.

When the cam surface for two-dimensional feeding is used in the clamp/unclamp cam 28, the lift/down cam 1 must be removed from the roller 2.

In this case, the lever 4 may be rotated clockwise in FIG. 2 by a cylinder (not shown) connected to the rod 5 or rack 6 and fixed at a predetermined release position.

Next, the operation of the device of the present invention will be explained.

In Figure 2, as the slide moves up and down, the lift
The rod 5 reciprocates by a cam/lever mechanism including the down cam 1 and the lever 4.

A rack 6 connected to the rod 5 and a driving pinion 7
, drive spline shaft 8, crank 9, feed bar receiver 1
0, and the other is connected to a pair of feed bars 26.2 via the spline shaft 11, the equalizer joint 12, the spline shaft 11', the crank 9', and the feed bar receiver 10'.
6 engages with the 180° reciprocating rotation of the cranks 9, 9 and moves up and down.

On the one hand, as the clamp/unclamp cam 28 moves up and down, the lever 4', the rod 23, the rack 20, the pinion shaft 19, the arm 18, the drive lever 17, and the carrier 13 are connected to the rack 15' and the equalizer pinion. 16,
A pair of feed bars 26 and 26 perform clamping and unclamping operations via the rack 15, carrier 13, and feed bar receiver 10.

The above operation is for three-dimensional feeding, but in the case of two-dimensional feeding, the roller 2 should not come into contact with the lift/down cam 1, and the two-dimensional feeding cam surface of the clamp/unclamp cam 28 should be used. do.

Therefore, the feed bar 10, 10' only performs clamping and unclamping operations in the lowered state.

In other words, there is no lift-down operation. In FIG. 2, the cylinder 22 moves the drive box 21 in the horizontal direction to adjust the inner width of the clamp.

When the drive box 21 moves in the horizontal direction, the feed bar receiver 10.10' moves by that amount via the pinion shaft 19, arm 18, drive lever 17, etc., and the inner width changes.

The internal width of the clamp can be changed in stages depending on the size of the product to be pressed.

FIGS. 7 and 8 show other embodiments.

Cams for clamping/unclamping and lifting/down are fixed to the crankshaft or other rotating shaft of the press.

Cam 29 is a cam for clamping/unclamping, and lever 3
1 corresponds to a rotatably held roller.

The lever 31 is rotatably held on the frame of the press.

A rod 35 connected to one end of the lever 31 corresponds to the rod 23 described above.

The rod 33 is connected to the lever 31, and the lever 31
The structure is such that the two-dimensional feeding cam surface and the three-dimensional feeding cam surface of the cam 29 can be selected and used by pushing and pulling them with the cylinder 36.

The lever 32 is rotatably held in the frame of the press, and a roller rotatably held at one end is connected to the cam 3.
0, and a rod 34 is connected to the other end.

The rod 34 corresponds to the rod 5 described above.

Since the present invention has the above configuration, (a) the carrier 13, 13' is compact, and therefore the unit box 27 and drive box 21 are also compact, so the space for taking out the feed bar is widened.

(b) It is possible to switch between two-dimensional feeding and three-dimensional feeding.

(c) The inner width of the feed bar can be adjusted.

There are effects such as

[Brief explanation of drawings]

Fig. 1 is an overall plan view of one embodiment of the present invention, and Fig. 2 is an overall plan view of an embodiment of the present invention.
3 is a BB sectional view in FIG. 2, FIG. 4 is a CC sectional view in FIG. 2, FIG. 5 is a DD sectional view in FIG. 2, Figure 6 is a view in the direction of arrow E in Figure 2;
The figure is a cross-sectional view of the crown part in another embodiment, FIG. 8 is a view taken along arrow F in FIG. 7, 1 is a lift/down cam, 2 is a roller, 3 is a frame,
4, 4' are levers, 5 is a rod, 6 is a rack, 7 is a driving pinion, 8 is a driving spline shaft, 9 is a crank, 1
0 is a feed bar receiver, 11 is a spline shaft, 12 is an equalizer joint, 13 is a carrier, 14 is a wheel, 15
is a rack, 16 is an equalizer pinion, 17 is a drive lever, 18 is an arm, 19 is a pinion shaft, 20 is a rack,
21 is a drive box, 22 is a cylinder, 23 is a rod, 24 is a transfer unit, 25 is a slider, 26
is a feed bar, 27 is a unit box, 28 is a clamp/unclamp cam, 29 is a cam, 30 is a cam,
31 is a lever, 32 is a lever, 33 is a rod, 34 is a rod, 35 is a rod, 36 is a cylinder, 37 is a drive eccentric bin, and 38 is a drive pinion box.

Claims (1)

[Scope of claim for utility model registration] A rack at the lower end of a rod that engages with a clamp/unclamp cam provided on one side of the slide of the press and moves up and down;
A driving eccentric pin provided at the end of the arm of a rotating pinion shaft that is pivotally installed in a driving box that engages with the rack and is connected to a fluid cylinder provided on the frame, and a unit fixed to the side of the press frame. A pair of carriers supported so as to be movable left and right inside the box, a feed bar receiver provided inside the carrier so as to be movable up and down, a rack connected to the carrier and sliding oppositely inside the unit box; A clamp/unclamp drive unit consisting of an equalizer pinion provided at the center of a unit box that meshes with the opposing rack and rotates in synchronization, a drive lever that connects the other end of the carrier and the drive eccentric pin, and a slide of the press. A rack at the lower end of the rod that engages with a lift/down cam provided on the other surface to move up and down, and a drive pinion that engages with the rack and rotates while being held in a drive pinion box fixed to the frame. The feed bar holder, which slides up and down in the carrier, has a crank installed through the main body, a spline shaft connected to the crank and provided facing inwardly, and a tip that slides with the opposing spline shaft. a lift/down drive unit comprising an equalizer joint that rotates integrally with the opposing spline shaft; and a drive spline shaft that is coupled to the other end of the penetrating crank and slidably engages with the spline hole of the drive pinion. and,
Feed bar clamp/unclamp and lift/down equipment for transfer presses, which is characterized by being attached.