JPH0337797Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a transfer feeder device mounted on a press machine.

BACKGROUND ART A pair of feed bars are moved three-dimensionally in the feed direction, the clamp direction, and the lift direction by a feed lever that is swung by a feed cam, a clamp lever that is swung by a clamp cam, and a lift lever that is swung by a lift cam.
A transfer feeder device is known in which a cam shaft to which each cam is attached is connected to a slide drive source to move a feed bar three-dimensionally in synchronization with the vertical movement of the slide.

In addition, in a press machine, the feed bar is divided into three or five parts into a longitudinal middle part, one longitudinal end part, and the other longitudinal end part, and these parts are connected in the longitudinal direction with a connecting device so as to be cuttable. When changing molds, etc., move the feed bar longitudinally, disconnect the connecting device, divide it into three or five parts, and move only the middle part in the longitudinal direction to the outside of the press machine together with the movable bolster to separate the upright from the feed bar. is trying not to interfere.

In addition, when replacing the mold, the slide is moved downward, the upper mold touches the lower mold of the moving bolster, the upper mold is removed from the slide, the slide is moved upward, and the upper and lower molds are moved with the moving bolster out of the press machine. There is.

Problems to be Solved by the Invention As described above, when changing molds, the feed bar moves to move the slide up and down, so conventionally the clamp lever was forcibly swung in the direction away from the clamp cam to move the pair of feed bars. The lift lever is moved outward from the normal unclamping position for forced unclamping, and the lift lever is forcibly swung in a direction away from the lift cam to move the pair of feed bars below the normal down position for forced downing. Even if the clamp cam and lift cam rotate, the feed bar is prevented from moving in the clamp direction and lift direction.

However, when the slide is moved up and down in the above-mentioned condition, the feed bar moves in the feed direction, so the feed bar cannot be divided as described above, and the slide must be moved up and down to take out the upper and lower molds and separate the feed bar separately. Mold exchange time becomes longer.

Means and operation for solving the problem A locking mechanism that locks the feed lever while in contact with the large diameter portion of the feed cam or a locking mechanism that locks the lift lever while in contact with the large diameter portion of the lift cam is provided, This prevents the feed lever or lift lever from swinging even when the camshaft rotates.

Embodiment FIG. 4 is an overall schematic diagram showing a two-post press, and since the same applies to a three-post press, illustration is omitted. The bed 1 and the crown 2 are connected by an upright 3, and the upright A slide 4 is provided along the bed 1 so as to be movable up and down.
A transfer feeder device 8 is provided above, in which a movable bolster 5 can run freely, and a pair of feed bars 6 are moved in three dimensions by a drive mechanism 7, and the feed bars 6 have an intermediate portion 6a, one end portion 6b, and the other end portion 6c.
and can be connected by a connecting device 9.

The drive mechanism 7 includes a box-shaped housing 10 attached to the upright 3 as shown in FIGS. 1 and 2.
A camshaft 11 is rotatably supported horizontally on the housing 10, and a feed cam 12, a lid cam 13, and a clamp cam (not shown) are attached to the camshaft 11. It is connected to a slide drive source (not shown) via a mechanism 14.

An intermediate portion of a feed lever 15 is swingably supported on the upper part of the housing 10 by a pin 16.
A cam follower 17 provided at the lower end is in contact with the feed cam 12, and the housing 10 is in contact with the feed cam 12.
The lower end of the lift lever 18 is attached to a pin 19 at the bottom of the
A cam follower 20 provided in the middle thereof is in contact with the lift cam 13.

A rod 2 is attached to the upper end of the feed lever 15.
A feed carrier 22 is connected to the feed carrier 22 through the feed carrier 1, and a sub-carrier 23 is provided on the feed carrier 22 so as to be movable in the clamping direction. A feed bar 6 is fitted and attached so as to be vertically movable, and the feed carrier 22 is movable longitudinally along a guide bar 25 and is connected to the lift lever 18 via a link 26. A rod 27 is connected to the feed bar 6 via a mechanism that converts reciprocating motion into vertical motion.

An intermediate portion of the auxiliary lever 28 is swingably supported on the housing 10 by a pin 29, and a reaction cylinder 31 is pivotally connected to the upper end of the auxiliary lever 28 by pins 32 and 33, and a lever 30 fixed to the pin 16. A cam follower 34 provided at the lower end of the auxiliary lever 28 is in contact with the feed cam 12.

A lock mechanism 35 is provided between the feed lever 15 and the housing 10, and this lock mechanism 35 includes a bracket 36 fixed to the feed lever 15 and a lock pin 38 that is moved in and out by a cylinder 37 provided in the housing 10. The feed lever 15 is locked by fitting into the hole 39 of the bracket 36.

Next, the operation will be explained.

The illustrated state shows the standby point (that is, when the slide 4 stops almost to the top dead center), and the feed cam 1
The cam follower 17 of the feed lever 15 is in contact with the second large diameter portion 12a, the feed lever 15 is rocking clockwise, and the feed carrier 22 is moving to the right.

In this state, the cylinder 37 locks the lock pin 3.
8 into the hole 39 of the bracket 36, the feed lever 15 is locked in that position.
Even if the camshaft 11 is rotated and the feed cam 12 is rotated, the auxiliary lever 28 only swings and compresses the reaction cylinder 31, but the feed lever 15 does not swing. At this time, the feed cam 12 moves away from the cam follower 17, so the feed lever 15
There is no problem in locking the .

For this reason, the feed carrier 22 does not move and the feed bar 6 does not move in the feed direction.

Therefore, in order to replace the mold, slide 4
lower to bring upper mold A and lower mold B into close contact,
When removing (unclamping) the upper mold A from the slide 4, the feed bar 6 does not move in the feed direction even if the camshaft 11 rotates together with the slide 4, so the feed bar can be separated at an early stage. There is now a place where the automatic die chaining process can be performed at the same time, making it possible to change molds in a short time.

Note that, at this time, even if the camshaft rotates due to forced unclamping or forced down, the feed bar is prevented from moving in the clamping direction or lifting direction, as in the conventional case.

That is, without the locking mechanism 35 for the feed bar 6, the feed bar 6 would move when the slide 4 is lowered to remove the upper mold A, and the feed bar would be divided in subsequent steps, which would take a long time.

This also applies to the case where the feed bar 6 is connected when it is attached (clamped) to a new upper mold A slide 4.

The above embodiments are for the case where the cam follower of the feed lever is in contact with the large diameter part of the feed cam at the standby point, and when the cam follower of the feed lever is in contact with the small diameter part of the feed cam at the standby point, FIGS. As shown in FIG. 8, a lift lever locking mechanism 50 may be provided to prevent the lift lever from swinging and to lock the feed lever from moving in the lifting direction.

That is, a lock pin 53 facing the hole 52 of the protrusion 51 provided on the upper part of the lift lever 18 is provided in the housing 10 so as to be freely removable by the cylinder 54, and the lock pin 53 is connected to the hole 52 and the hole 56 of the bracket 55 fixed to the housing 10. The structure is such that the lift lever 18 is locked by fitting together.

Effects of the invention If the feed lever 15 is locked while in contact with the large diameter portion 12a of the feed cam 12, the feed lever 15 will not swing even when the camshaft 11 rotates, so even if the slide is moved up and down when replacing the mold. The work of taking out the upper and lower molds and the work of dividing the feed bar 11 can be done at the same time by moving the slide up and down without moving the feed bar 11 in the feed direction, so that the mold exchange time can be shortened.

If the lift lever 18 is locked while it is in contact with the large diameter part of the lift cam 13, the lift lever 18 will not swing even if the camshaft 11 rotates, so even if the slide is moved up and down when replacing the mold, the feed bar 11 will not move. Even if the feed bar 11 moves in the feed direction without moving in the feed direction, it does not get in the way so much, making it easier to replace the upper and lower molds, and the mold replacement time can be shortened accordingly.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a front view, FIG. 2 is a side view, FIG. 3 is a sectional view taken along the line -- in FIG. 1, FIG. 4 is an overall schematic diagram, and FIG. 6 is a side view, and FIG. 7 is a plan view of the embodiment.
FIG. 8 is a sectional view taken along the - line in FIG. 7. 11 is a camshaft, 12 is a feed cam, 13 is a lift cam, 15 is a feed lever, and 18 is a lift lever.

Claims (1)

[Scope of utility model registration request] A feed lever 15 and a lift lever 18 are oscillated by a feed cam 12 and a lift cam 13 provided on a camshaft 11, and the feed bar 6 is connected to the feed bar 15 and lift lever 18 via a coupling mechanism.
In the transfer feeder device connected to
The transfer shaft is characterized by being provided with a locking mechanism that locks the feed lever 15 in a state in which it is in contact with the large diameter portion 12a of the feed cam 12, or a mechanism that locks the lift lever 18 in a state in which it is in contact with the large diameter portion of the lift cam 13. Afida device.