JPH039868Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transfer bar dividing device for dividing a transfer bar of a transfer device in its longitudinal direction.

A transfer bar of a transfer device is provided between uprights in a press to transport a workpiece between processes and into and out of the press.

Since this transfer bar is longer than the distance between the uprights, it cannot be placed on the bolster and ejected from the press together with the mold when replacing the mold.

Therefore, conventionally, as shown in FIG. 1, the transfer bar a is divided into three parts: a left transfer bar a', a center transfer bar a'', and a right transfer bar a'', and these are connected to each other so that they can be freely approached and separated. When replacing the mold, the transfer bars a′, a″, a
The central transfer lever a'' is placed on a bolster and discharged from the press together with the mold. In Fig. 1, b is an upright.

And to split this transfer server,
This is done by a dividing device fixed to the upright b of the press, or by a feed mechanism that moves the transfer bar forward and backward.

However, in the former case, since the splitting device is fixed to the upright, there are space constraints such as molds, and there are restrictions on the installation location and size of the splitting device, which is undesirable. ,
Since it is a feed mechanism that controls the advance and return movements of the transfer lever, the movement stroke of the transfer lever is constant, but when dividing the transfer lever into many parts, the dividing stroke is insufficient, and in some cases, division is not possible. This may cause other problems.

The present invention was devised in view of the above-mentioned circumstances, and is free from restrictions on installation space due to molds, etc., and can be used even when the transfer bar is divided into many parts. It is an object of the present invention to provide a transfer fiber dividing device that can obtain a stroke.

Embodiments of the present invention will be described below with reference to FIG. 2 and subsequent figures.

FIG _. 2 is a plan _view showing the relationship between the transfer bar and _the uprights. The transfer bar 2 includes third uprights A' ₁ , A' ₂ , A' ₃ , and the transfer bar 2 includes a left transfer bar 2L, a left center transfer bar 2'L, a center transfer bar 2C, and a right center transfer bar 2'R.
and the right transfer bar 2R, each of which is connected by a connecting device B so as to be freely accessible and detachable.

A pair of left and right dividing devices C, C are provided at both ends of the transfer bar 2.

The dividing device on the right side will be explained below.

FIG. 3 is a schematic front view, in which the left transfer lever 2L is provided on the left lift/clamp mechanism 1L, and the right transfer lever 2R is provided on the right lift/clamp mechanism 1R.

3 is a feed mechanism in which a feed lever 6 is brought into contact with a feed cam 5 provided on a camshaft 4, and a feed carrier 8 connected to the feed lever 6 via a rod 7 is moved to a position above the right lift/clamp mechanism 1R to transfer the feed lever 6 to the right transfer lever 2R. It is connected above.

The details will be explained below with reference to FIG. 4 and subsequent figures.

As shown in FIGS. 4 and 5, a pair of guide rails 5 are provided on the inner end surfaces of the pair of third uprights A ₃ and A' ₃ on the right side in the front and back (direction perpendicular to the feed direction).
0 and 50 are fixedly installed opposite each other, and the feed carrier 8 is horizontally supported across a pair of guide rails 50 and 50 so as to be movable left and right (in the feed direction) via rollers 52. A front sub-carrier 53 and a rear sub-carrier 54 are respectively mounted on the holder so as to be movable back and forth via rails 55 and rollers 56. Each subcarrier 53, 54 has a pair of front and rear feed pins 57,
58 is suspended, and each feed pin 57, 58 is
It is fitted into the pair of right transfer bars 2R, 2R via a bush 59 so as to be vertically movable. Reference numeral 4 denotes a camshaft, and a pair of front and rear feed cams 5 are fixed to the camshaft 4. Each feed cam 5 abuts on a pair of front and rear feed levers 6 that are swingably supported. The feed levers 6 are pivotally connected to the front and rear sides of the feed carrier 8 via a multi-stage cylinder mechanism D, and each feed lever 6 is urged to swing counterclockwise in the figure by a pair of air cylinders 64.

The lift/clamp mechanism 1 also includes a lift carrier 7 that is vertically movable, as shown in FIG.
0, and a pair of clamp carriers 71 and 7 which are provided on the lift carrier 70 so as to be movable back and forth and support the transfer bar 2 so as to be movable in the longitudinal direction.
1, and the lift carrier 70 and clamp carrier 71 are moved up and down and moved toward and away from each other by a conventionally known mechanism, for example, a rack and pinion as shown in FIG.

As shown in FIG. 7 and subsequent figures, the multistage cylinder mechanism D includes a cylinder body 10 fixed to the feed carrier 8, a first piston 12 fitted into a cylinder hole 11 of the cylinder body 10, and a first piston 1.
The second piston 1 inserted into the cylinder hole 13 of No. 2
4 and a piston rod 15 provided on the second piston 14
The first piston 12 reciprocates between a first position where the stepped portion 12a abuts the stepped portion 11a of the cylinder hole 11 and a second position where the stepped portion 12a abuts the lid 16, and the first piston 12 ₁ and the second chamber ₁₁₂ , and the second piston 14 is located in the cylinder hole 1.
The chamber reciprocates between a first position in which it abuts against the stepped portion 13a on one side of the third side and a second position in which it abuts against the stepped portion 13b on the other side, and constitutes third and fourth chambers 13 ₁ and 13 ₂ . .

A pin 18 is fixed to one end of the piston rod 15 via a yoke 17, and this pin 18 is connected to a pair of side plates 19, 19 fixed to the feed carrier 8.
The piston rod 15 is relatively slidable along the guide hole 20 and connected to the rod 7, and the other end of the piston rod 15 faces between a pair of vertical plates 21, 21 fixed to the feed carrier 8. A pinion 23 meshes with the rack teeth 22, and the pinion 23 is connected via a shaft 24 to a pinion provided in the multi-stage cylinder mechanism D on the opposite side. D and D are synchronized. 25 is a guide roller.

The first chamber 11 ₁ and the second chamber 11 ₂ open to the first port 26 and the second port 27 formed in the cylinder body 10, and the third chamber 13 ₁ and the fourth chamber 13 2 open to the first port 26 and the second port 27 formed in the cylinder body _10.
is open to a third port 28 formed in the piston rod 15 and a fourth port 29 formed in the first piston 12.

FIG. 11 is a hydraulic circuit diagram, in which the pressure oil discharged from the hydraulic source 30 is divided into the first and second main circuits 31 and 32,
The first main circuit 31 is connected and controlled to the first and second ports 26 and 27 via a first switching valve 33, and
The main circuit 32 is connected to the third and fourth switching valves via the second switching valve 34.
Connection to ports 28 and 29 is controlled.

The first switching valve 33 connects the first main circuit 31 to the first port 26 and connects the second port 27 to the drain 3.
5, the second main circuit 31 is connected to the second
and a second position (b) that connects to the port 27 and connects the first port 26 to the drain 35, and can be switched by energizing the first and second solenoids 33 ₁ and 33 ₂ .

The second switching valve 34 connects the second main circuit 32 to the third port 28 and connects the fourth port 29 to the drain 3.
5, the second main circuit 32 is connected to the fourth
and a second position E which connects the port 29 and the third port 28 to the drain 35, and can be switched by energizing the first and second solenoids 34 ₁ and 34 ₂ .

Next, the operation will be explained.

During normal operation of the transfer bar 2, that is, when a plurality of unit transfer bars 2L, 2'L, 2C, 2'
When moving the transfer valve 2 left and right with R and 2R connected by the connecting device B, the first and second switching valves 33 and 34 shown in FIG. 11 are set to the first positions A and D, respectively. 1. Second piston 1
2 and 14 are at the right position, respectively, as shown in FIG.

In this state, the camshaft 4 that constitutes the feed mechanism 3
When the cam 5 is rotated, the feed lever 6 swings clockwise against the air cylinder 64, and the feed carrier 8 is moved to the right via the rod 7 and the multi-stage cylinder mechanism D. As the feed carrier 8 moves to the right, the transfer bar 2 is moved to the right via the sub-carriers 53, 54 and feed pins 57, 58 (advance movement). The end of rightward movement of the feed carrier 8 (maximum rightward stroke) is detected by the first proximity switch _LS1 shown in FIG.

Then, the cam 5 further rotates and the cam 5
As the feed lever 6 rotates toward the bottom 5a, the feed lever 6 is swung counterclockwise because it is biased by the air cylinder 64, causing the rod 7 to move the feed carrier 8 to the left, as described above. , move the transfer bar 2 to the left in the figure (return movement). The end of movement (maximum leftward stroke) of the feed carrier 8 is detected by a fourth proximity switch _LS4 shown in FIG.

This allows advance return movement (feed) of the pair of transfer servers 2, 2.

Furthermore, when the transfer bar 2 is lifted down, the bush 59 slides up and down along the feed pins 57 and 58, so the feed carrier 8 does not move up and down, and when the transfer bar 2 is moved to clamp/unclamp, the feed pin 5
Since the sub-carriers 53 and 54 move back and forth along the feed carrier 8 via the feed carriers 7 and 58, the feed carrier 8 does not move back and forth.

Next, a case where the transfer server 2 is divided will be explained.

First, the central transfer bar 2C is fixed by some means, the connecting device B between the central transfer bar 2C and the right central transfer bar 2'R is disconnected, and the first switching valve 33 shown in FIG. 11 is moved to the second position. By supplying pressure oil to the second chamber ₁₁₂ ,
The cylinder body 10 is moved to the right in the figure relative to the first piston 12.

As a result, the cylinder body 10 is connected to the piston rod 15.
is relatively displaced by L ₁ shown in Fig. 8,
Since the feed carrier 8 moves to the right by L ₁ , the right center transfer lever 2'R and the right transfer lever 2R move to the right by L ₁ , and the 12th
As shown in the figure, the center transfer bar 2C and the right center transfer bar 2'R are separated. The position of the feed carrier 8 at this time is detected by the third proximity switch _LS3 shown in FIG.

Next, the connecting device B between the right-side center transfer bar 2'R and the right-side transfer bar 2R is disconnected, the second switching valve 34 shown in _FIG . By supplying , the first piston 12 is moved to the right in the figure relative to the second piston 14.

As a result, the cylinder body 10 is attached to the piston rod 1.
5 is displaced by L ₂ shown in Figure 8,
Since the feed carrier 8 moves to the right by _L2 , the right transfer lever 2R moves to the right by _L2 , and as shown in FIG. Ru. The position of feed carrier 8 at this time is
The proximity switch LS ₂ shown in Figure 1 detects this.

In the above-mentioned embodiment, the right side dividing device C was explained, but the left side dividing device is also the same, and the left side transfer bar 2L, the left side center transfer bar 2'L, and the center transfer bar 2C are divided in the same way. .

As described above, in the transfer bar dividing device according to the present invention, a pair of transfer bars 2 formed by connecting a plurality of unit transfer bars so as to be able to move toward and away from each other in the longitudinal direction using a connecting device B are arranged in the front and rear of the press. On the other hand, guide rails 50, 5 provided in the press
A front sub-carrier 53 and a rear sub-carrier 54 are mounted on the front and rear sides of the feed carrier 8, which is movable in the left-right direction along 53 and the rear sub-carrier 54, a multi-stage cylinder mechanism D is fixed to the feed carrier 8, and the maximum movable piston portion of the multi-stage cylinder mechanism D is connected to a feed mechanism fixed near the end of the transfer bar 2. 3. Therefore, if the feed mechanism 3 is operated with the multi-stage cylinder mechanism D made non-extensible, the movement of the feed mechanism 3 will be transferred to the transfer bar 2 via the feed carrier 8, the front sub-carrier 53, and the rear sub-carrier 54. The transfer lever 2 moves in normal advance and return motions, and when the transfer bar 2 is divided into unit transfer bars, the multistage cylinder mechanism D is reduced while the feed mechanism 3 is stopped. By setting the number of cylinder stages of the multi-stage cylinder mechanism D according to the number of divisions of the transfer bar 2, that is, the number of unit transfer bars, each unit transfer bar can be stopped at a predetermined division position. Moreover, since such division is performed by retracting the multi-stage cylinder mechanism D fixed to the feed carrier 8 while the feed mechanism 3 is stopped, the feed mechanism 3, For example, this can be easily done with just enough force to operate the unit transfer lever without being affected by an air cylinder or the like that urges the feed lever to constantly contact the drive cam, and furthermore, The multi-stage cylinder mechanism D can be made small and inexpensive,
In addition, the multi-stage cylinder mechanism D has a feed carrier 8.
Since it is fixedly installed, it does not get in the way and is not subject to any restrictions on installation space due to molds, etc.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional example, Fig. 2 and subsequent figures show embodiments of the present invention, Fig. 2 is a schematic plan view of a transfer bar and an upright, Fig. 3 is an overall schematic front view, and Fig. Fig. 4 is a plan view of the feed carrier, Fig. 5 is a front view, Fig. 6 is a longitudinal sectional view, Fig. 7 is a longitudinal sectional view of the multistage cylinder, and Fig. 8 is a transverse sectional view.
Figures 9 and 10 are the - and - lines in Figure 7.
11 is a hydraulic circuit diagram, FIGS. 12 and 13 are operation explanatory diagrams, and FIG. 14 is an explanatory diagram showing a conventional lift/clamp mechanism. 2 is a transfer bar, 3 is a feed mechanism, 8 is a feed carrier, 50 is a guide rail, 53 is a front subcarrier, 54 is a rear subcarrier, and D is a multistage cylinder mechanism.

Claims (1)

[Scope of Claim for Utility Model Registration] A transfer bar 2 is formed by connecting a plurality of unit transfer bars so as to be able to move toward and away from each other in the longitudinal direction by a connecting device B, and a pair of the transfer bars 2 are arranged at the front and rear in a press, Feed carrier 8 that is movable left and right along guide rails 50, 50 provided inside the press.
A front sub-carrier 53 and a rear sub-carrier 54 are respectively mounted on the front and rear sides of the feed carrier 8 so as to be movable in the front-rear direction, and the ends of the pair of front and rear transfer bars 2 are attached to the front and rear sub-carriers 53 and rear sub-carriers. 54
A multi-stage cylinder mechanism D is connected to the feed carrier 8, respectively.
A transfer bar dividing device characterized in that: the maximum movable piston portion of the multistage cylinder mechanism D is connected to a feed mechanism 3 fixed near an end of the transfer bar 2.