JPH0444280Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a transfer press machine in which the feed bar is divided into three parts so that the central bar can be taken out when changing molds. This invention relates to a device for preventing a lifted bar returned to its position from colliding with a remaining bar and falling off a bar holder.

[Conventional technology]

3 to 5 show a transfer press machine in which the feed bar is divided into three parts. As shown in FIG.
B, 20C, 21B, and 21C, and the lifting bars 20A and 21A to which fingers (not shown) for clamping the workpiece are attached are brought out to the mold changing position when changing the mold so that the fingers can be replaced. Residual bars 20B, 20C, 21
B and 21C can be connected to and separated from each other at a connecting portion 22.

As shown in FIG.
4, and these connectors 23 and 24 are vertically symmetrical in shape. That is, the tapered convex portions 2 are provided on the distal ends of the connectors 23 and 24.
5. A tapered recess 26 is provided, and a tapered protrusion 27 and a tapered recess 28 are provided on the base end side, and these are connected by an inclined surface 29. Takeout bar 20
By moving A and 21A up and down, the take-out bar and the remaining bar are connected and separated.

As shown in Fig. 4, during press work when these are connected, residual bars 20B, 20C, 21B, 21
The feed bars 20 and 21 perform a three-dimensional movement for conveying the workpiece by means of the device 31 of the bar holding member 30 that holds C, and the workpiece is conveyed to each processing stage in sequence.

A common plate 33 is placed on the bolster 32, and the bolster 3 is connected via this common plate 33.
The lower mold 34 is placed on the mold 2. Common plate 33
Four pillars 35 are erected at both ends of the bar 20A, 21A directly below the carry-out bars 20A, 21A, and a bar holder 36 is fixed to the top of each pillar 35.
As shown in FIG. 6, this flat bar holder 36 is provided with a protrusion 37.
1A is provided with a hole 38 into which the protrusion 37 is fitted.

As shown in FIG. 4, a die lifter 39 is incorporated inside the bolster 32, and this die lifter 39 has a cylinder 40 that moves a rail 41 with rollers up and down. As shown in Figure 5, there are two roller rails 42 and 4 at the front and rear of the transfer press machine, respectively.
3 are connected, and these rails 42, 43
It extends to the mold exchange positions B and C shown in the figure.

As shown in FIG. 5, drive devices 44 and 45 are provided in parallel with the rails 42 and 43, and these drive devices 4
Reference numerals 4 and 45 are, for example, chains that reciprocate and are provided with hook members. The common plate 33 is locked to a hook member by a drive device 44 and reciprocated between a press work position A and a mold exchange position B shown in FIG. ' is locked by a hook member and reciprocated between a press work position A and a mold exchange position C by a drive device 45.

When replacing the mold after pressing work, lower the slide 46 to the bottom dead center, transfer the upper mold 47 onto the lower mold 34, raise the slide 46, and then replace the mold with the rail 41 of the die lifter 39. Slightly push the common plate 33 up from the bolster 32. As a result, the mold consisting of the upper and lower molds 34 and 47 rises, and the bar holder 36 also rises, and the protrusion 37 fits into the hole 38, and the take-out bars 20A and 21A placed on the bar holder 36 rise. and separate it from the remaining bars 20B, 20C, 21B, and 21C.

After this, the drive device 44 drives the common plate 3
3 in a direction perpendicular to the longitudinal direction of the feed bar and run on the rail 42, the mold and the take-out bars 20A, 21A are transported to the mold exchange position B. At the same time, the mold to be used for the next press operation and the take-out bars 20A, 2
The common plate 33' on which the bar holders 36' carry the take-out bars 20A' and 21A' in place of the bar 1A is carried to the press work position A, and the next press work is performed.

During this press operation, the common plate 33 is loaded with the next press operation die for die exchange at die exchange position B, and the fingers of the carry-out bars 20A, 21A are exchanged for those corresponding to the new die. After the press operation, the common plate 33' carrying the die and the carry-out bars 20', 21' is carried out to the die exchange position C, and the exchanged die and the carry-out bars 20A, 21A at the die exchange position B are driven by the drive unit 44.
The common plate 33 is moved to the pressing position A by the movement of the common plate 33, and after the common plate 33 is transferred to the rail 41 of the die lifter 39, the rail 41 is lowered. As a result, the lower die 34 is placed on the bolster 32 via the common plate 33, and the upper die 47 is attached to the lowered slide 46. Furthermore, the extension bars 20A and 21A
The remaining bar 20B,
It is connected to 20C, 21B, and 21C.

[Problem that the invention attempts to solve]

In the above, when the take-out bars 20A, 21A or 20A', 21A' are carried into the press work position A, the common plate 33 or 3
If there is a positional shift in the longitudinal direction of the feed bar due to an error in the arrangement position of the connectors 23, 24, etc.
The end portions of the take-out bar and the remaining bar collide with each other, and the take-out bar falls off from the bar holder 36. If the height of the carry-out bar is set sufficiently high and the bar is carried into the press work position A, the collision will not occur, but for this purpose the cylinder 40 of the die lifter 39 must have a large stroke.

However, since the cylinder 40 is built into the inside of the bolster 32, a cylinder with a large stroke cannot be used, and a stroke for the protrusion 39 to fit into the hole 38 is also required. The vertical stroke that can be applied to the shaft is small.

In a transfer press machine in which a die lifter 39 is provided on such a bolster 32, and the bar holder 36 is moved up and down by the die lifter 39, the take-up bar can be connected to and separated from the remaining bar at will. It is necessary to detect in advance the displacement of the take-out bar in the longitudinal direction of the feed bar during transport to prevent the take-out bar from falling off the bar holder 36 due to collision with the remaining bar.

The purpose of this invention is to detect when there is a displacement in the longitudinal direction of the feed bar being carried into the press work position, and to prevent the take-out bar from falling off the bar holder due to collision with the remaining bar. The feed bar is equipped with a safety device.

[Means for solving problems]

For this reason, in the device according to the present invention, the feed bar is divided into three parts, consisting of a central take-out bar and residual bars on both ends, and a die lifter installed on the bolster on which the common plate is placed allows the feed bar to stand up against the common plate and the common plate. The provided bar holder is movable up and down, and the take-out bar placed on the bar holder and moved up and down is connected to and separated from the remaining bar, and the take-out bar is placed on the bar holder. The common plate on which the mold is mounted is transported by a drive device in the direction perpendicular to the longitudinal direction of the feed bar from the press work position to the mold exchange position, and after the mold exchange, the common plate is transported from the mold exchange position to the press work position. In the Apress machine, a displacement of the feed bar in the longitudinal direction of the take-out bar is detected in the residual bar, and the drive of the drive device is stopped by detecting this displacement when the feed bar is carried into the press work position. This device is characterized by being provided with a detection means.

[Operation] If the take-out bar carried into the press work position deviates from the predetermined position in the feed bar longitudinal direction, this positional deviation is detected by the detection means, and the drive device is activated before the take-out lever collides with the remaining bar. The drive is stopped and the loading of the take-out bar is also stopped.

〔Example〕

FIG. 1 is a sectional front view of a main part showing an apparatus according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line -- in FIG. In the following description, the same members and the like as already described are given the same reference numerals, and the description thereof will be simplified or omitted.

Remaining bar 20 of the feed bars 20 and 21
Detection means 1 is provided on the upper surface of the ends facing the take-out bars 20A and 21A in B, 20C, 21B, and 21C.
The detection means 1 provided in 1B is shown, and the detection means 1
The main components are a detector 2 and a rod-shaped dog 3 for operating the detector 2.

As shown in FIG. 2, three pillars 4 are erected on the upper surface of the residual bar 21B, and as shown in FIG.
The plate-shaped mounting member 5 placed on the bolt 6
It is connected to the remaining bar 21B together with the strut 4.
The detector 2 is fixed to the back surface of the mounting member 5 with a bolt 7, and the detector 2 has an operating rod 9 having a rotatable roller 8 at its tip. The actuating rod 9 can move forward and backward in the longitudinal direction of the feed bar, and is always biased toward the take-out bar 21A.

A guide member 11 is fixed to the lower surface of the end of the mounting member 5 on the side of the lifting bar 21A with a bolt 10, and this guide member 11 is connected to the guide groove 12 of the dog 3.
Fits in. The dog 3 has a guide member 11 and a guide groove 1 between the residual bar 21B and the mounting member 5.
The guide action of 2 allows the foot bar to slide freely in the direction perpendicular to the longitudinal direction of the foot bar.

As shown in FIG. 2, a V-shaped notch 13 is provided on the side surface of the dog 3 facing the detector 2.
3 engages with the roller 8 of the actuating rod 9. The dog 3 has a length larger than the width dimension of the remaining bar 21B, and when the roller 8 is engaged with the notch 13, the dog 3 is carried from the mold exchange position B to the press work position A. the common plate 33;
It protrudes by L from the remaining bar 21B toward the mold. Also, as shown in Figure 1, dog 3 is the residual bar 2.
1B and the connector 24 constituting the connector 22, and the end of the dog 3 on the side of the take-out bar 21A protrudes into the tapered recess 28 of the connector 24.

In the above, the dog 3 of the remaining bar 21C is at the mold exchange position B, as is the dog 3 of the remaining bar 21B.
Although it protrudes to the side by L, the remaining bar 20B, 20
The dog 3 of C protrudes by L toward the mold exchange position C side.

Next, we will discuss the effect.

In this embodiment, as in the prior art shown in FIGS. 3 to 7, the mold consisting of the upper and lower molds 34, 47 is moved to the mold exchange position B by the common plates 33, 33'.
C, and the bolster 32 is no longer a moving bolster.

The molds exchanged at the mold exchange position B and the take-out bars 20A and 21A placed on the bar holder 36 and having fingers exchanged are moved to the drive device 44.
The common plate 33 is moved to the press work position A by the movement of the common plate 33. If the take-out bars 20A, 21A are in the correct predetermined position at the time of carrying in, the take-out bars 20A, 21A
The connectors 23 at both ends of 1A do not touch the dock 3,
Connectors 23 and 24 connect the take-out bar and the remaining bar.

On the other hand, at the time of carrying in, the take-out bars 20A, 21
If A is shifted to the left in Figure 1,
The connector 23 at the left end of the take-out bar 20A comes into contact with the dog 3 of the detection means 1 provided on the remaining bar 21B, and pushes this dog 3.
When the take-out bars 20A and 21A are shifted to the right in FIG. Dotsugu 3
You will have to press Therefore, the dog 3 moves in a direction perpendicular to the longitudinal direction of the feed bar, and as a result of this movement, the actuating rod 9 is pushed in via the roller 8.
The positional deviation of A will be detected. The drive of the drive device 44 is stopped by the detection signal from the detector 2, and therefore the conveyance of the common plate 33, mold, and take-out bars 20A, 21A to the press work position A is stopped.

Here, after the detector 2 sends a detection signal, the common plate 33 and the like move somewhat due to inertia due to their own weight, but as mentioned above, the dog 3 protrudes a distance L toward the mold exchange position B. Therefore, the connector 23 of the takeout bar 20A is connected to the remaining bars 21B, 21.
The take-out bar 20 before colliding with the connector 24 of C
The movement of the bars A and 21A can be stopped, and it is possible to prevent the take-out bars 20A and 21A from falling off the bar holder 36.

As described above, the drive of the drive device 44 is stopped by the detection signal from the detector 2, and the take-out bar 20 is
After stopping the movement of A and 21A, the arrangement position of the common plate 33 etc. is corrected and the take-out bar 20
After eliminating the misalignment of A and 21A, the drive device 44 is driven again to connect the take-out bar and the remaining bar.

The above was a case where the common plate 33 was used to transport the take-out bars 20A', 21A from the mold exchange position B to the press work position A.
When carrying A' from the mold exchange position C to the press work position A, if there is a positional shift in the take-out bars 20A' and 21A', this positional shift is caused by the residual bar 2
It is detected by the detection means 1 provided at 0B and 20C, and the take-out bars 20A' and 20A' are detected as in the above case.
The movement of 21A' is stopped.

As described above, according to this embodiment, the bolster 32
Cylinder 4 of die lifter 39 incorporated in
Since the stroke of 0 cannot be made large, the amount of vertical movement of the take-out bar cannot be increased, so the take-out bar is placed on the bar holder 36 at a height position where it collides with the remaining bar and is carried into the press work position A. However, since the detection means 1 can detect the displacement of the feed bar in the longitudinal direction of the feed bar, the driving of the drive devices 44 and 45 can be stopped, and the ends of the take-out bar and the remaining bar provided with the connectors 23 and 24 can be stopped. Collisions between parts can be prevented,
It is possible to prevent the carry-out bar from falling off the bar holder 36.

[Effect of idea]

According to the present invention, if there is a positional shift in the feed bar longitudinal direction in the take-out bar being carried into the press work position, this can be detected, and the take-out bar collides with the remaining bar and the take-out bar falls off the bar holder. It will be possible to prevent this.

[Brief explanation of the drawing]

1 and 2 show an apparatus according to an embodiment of the present invention, FIG. 1 is a cross-sectional front view of the main part of the connection part between the take-out bar and the remaining bar, and FIG. 2 is the −-
Line sectional view, Figure 3 is a side view of the transfer press machine, Figure 4 is a front view of the same, Figure 5 is a plan view of the same, Figure 6 is a front sectional view of the bar holder, and Figure 7 is a conventional It is a front view of the connection part of the take-out bar and the residual bar in an example. 1...Detection means, 2...Detector, 3...Dog, 20, 21...Feed bar, 20A, 21
A...Takeout bar, 20B, 20C, 21B,
21C...Residual bar, 22...Connection part, 32...
Bolster, 33...Common plate, 34...Lower die, 36...Bar holder, 39...Die lifter,
44, 45... Drive device, 46... Slide, 4
7...Upper mold, A...Press working position, B, C...
Mold exchange position.

Claims (1)

[Scope of utility model registration request] The feed bar is divided into three parts, consisting of a central lifting bar and residual bars on both ends, and a die lifter installed on the bolster on which the common plate is placed allows the common plate and the bar holder installed on the common plate to be moved up and down. The common plate is configured such that the take-out bar, which is placed on the bar holder and moves up and down, can be connected to and separated from the remaining bar, and the mold is placed on the take-out bar while the take-out bar is placed on the bar holder. In a transfer press machine, the feed bar is transported from the press work position to the mold exchange position in a direction perpendicular to the longitudinal direction of the feed bar by a drive device, and after the mold exchange, the feed bar is transported from the mold exchange position to the press work position. , a dog that is movable in a direction perpendicular to the longitudinal direction of the feed bar, and which is contacted by the take-out lever when the take-out bar is displaced in the longitudinal direction of the feed bar; and a position shift that is activated by the movement of this dog to stop the driving of the drive device. a detector for transmitting a signal, and the dog has a length that projects from the residual bar toward the take-out bar carried into the press work position. Feed bar safety device.