JPH0649379Y2 - Material stand for press machine - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is to mount a material sent by a material feeding device for feeding to a press machine, and to deliver the material to a feed bar. Regarding the device.

[Prior Art] A material to be supplied to a press machine, that is, a blank material is transferred from a destack feeder to a material feeding apparatus, and this material feeding apparatus performs a blank material conveying operation including forward and backward movement and vertical movement. It consists of a repeating vacuum cup.By the blank material conveying operation of this vacuum cup, the blank material is sent to the final idle stage through each idle stage, after which the blank material is passed to the feed bar of the press machine and pressed. It The final idle stage is composed of a material cradle device that places a blank material, and a blank material of a size corresponding to the molded product is sent to this material cradle device every time the mold is replaced,
The material cradle device is required to be capable of effectively mounting blank materials of various sizes.

That is, even if a large area of blank material is sent, if the blank material receiving portion of the material receiving device is small, the end of the blank material hangs down, and the finger of the feed bar cannot clamp the blank material. on the other hand,
If the blank receiving portion of the material receiving device is large despite the fact that a small area blank is sent, the fingers interfere with the material receiving device during clamping, and the fingers and the like are damaged.

Therefore, conventionally, there has been proposed a device capable of changing the size of the blank material receiving portion in accordance with the size of the blank material. 57-76938 shows a device that moves the moving cradle with respect to the fixed cradle with a two-stage cylinder or a feed screw shaft. A device for selectively retracting a pin in a cylinder is shown. In addition to this, conventionally, there is also known a material cradle device in which a plurality of blank material cradles are attached by bolts and removable.

[Problems to be solved by the device]

Since the devices shown in JP 57-76938 and JP 58-102234 require a special drive source to drive the cylinder and feed screw shaft, these devices are not suitable for large press machines. Suitable and not suitable for small press machines. On the other hand, a device in which a plurality of blank material holders are attached by bolts and which can be removed does not require a special drive source, and thus can be used for a small press machine.

However, with this device, the worker has to use a tool to attach and detach the blank material cradle, which requires much labor and time, and there is a problem in workability. . It is also necessary to store and manage the removed blank material cradle.In addition, in order not to forget to remove the blank material cradle and operate the press machine, attach the blank material cradle,
There is also a problem that a sensor for interlocking the operation of the press machine is required when the removal is detected and attached.

The object of the present invention is that the size of the blank material receiving portion can be manually changed according to the size of the blank material without requiring a special drive source, and the blank material receiving portion can be removed without removing the parts. An object of the present invention is to provide a material cradle device for a press machine in which the size of the part can be changed and the workability is improved.

[Means for Solving the Problems]

Therefore, in the material receiving device of the press machine according to the present invention, the material sent by the material feeding device is placed, and in the material receiving device of the press machine that delivers this material to the feed bar, the central fixed receiving device is used. And a rotary pedestal arranged on both sides of the fixed pedestal so as to be rotatable in a vertical plane, and a rotary pedestal positioning means for holding the rotated pedestal in two vertical positions. The rotation center of the rotary pedestal is eccentric from the central portion in the height direction of the rotary pedestal.

The rotary pedestal positioning means includes, for example, a V groove formed in the end surface of the rotary pedestal in the height direction of the rotary pedestal and a ball urged by a spring, and the ball is fitted into the V groove. It is composed of a ball plunger.

[Action]

When the rotary pedestal is manually rotated by 180 degrees and the rotary pedestal positioning means positions and holds the rotary pedestal in two vertical positions, the center of rotation of the rotary pedestal is offset from the central portion in the height direction of the rotary pedestal. Because of this, the height position of the rotary pedestal changes by twice the amount of eccentricity, and as a result, the size of the blank material receiving portion of the material pedestal device can be easily adjusted by rotating the rotary pedestal. The size can be changed to correspond to the size of the blank material.

Further, when the rotary pedestal positioning means is composed of the V groove and the ball plunger described above, the rotary pedestal is forgotten to rotate even though the blank material having a small area is being sent. Even if the table is at a high position, if this finger interferes with the rotary pedestal when clamping the blank material with the fingers of the feed bar, the rotary pedestal will rotate while retracting the ball against the spring, so that the finger It will be possible to prevent damage to the etc.

〔Example〕

FIG. 1 is a plan view of a press machine 1 to which a material cradle device according to an embodiment of the present invention is applied. The blank material supplied to the press machine 1 is a vacuum cup from a destack feeder (not shown). The material is fed to the material cradle device 3 which constitutes the final idle stage by the material feeding device 2 constituted by the above. The press machine 1 is provided with processing stages 4 to 8 in order following the material cradle device 3. The two parallel feed bars 9 are approached, separated, raised, and lowered by a feed bar receiving member 12 connected to the drive units 10 and 11. The feed bar 9 moves forward (moves to the right in FIG. 1) and moves backward with respect to the feed bar receiving member 12 by a drive mechanism (not shown).

The feed bar 9 repeats the blank material conveying operation of sequentially approaching, ascending, advancing, descending, unclamping and retracting the feed bar 9 to clamp the blank material with the fingers 13, so that the blank material is transferred from the material receiving device 3 to the processing stage. Four
Further, it is sent to the processing stages 5 to 8 in order and pressed by vertical movement of a slide (not shown).

The material cradle device 3 according to the present embodiment is installed on the upper surface of the drive unit 10. The specific structure is shown in FIG. 2 and subsequent figures.

The material cradle device 3 is formed in a quadrangular shape in its overall shape, and its frame 14 is arranged at a distance in the blank material conveying direction.
It is composed of individual side members 15 and a bottom member 16 shown in FIG.
As shown in FIG. 2, a fixed pedestal 17 is fixedly installed at the central portion in the length direction of the two side members 15, and rotary pedestals 18 are provided on both sides of the fixed pedestal 17 in the direction perpendicular to the blank material conveying direction. 19 are arranged symmetrically.

As shown in FIG. 3, the upper surface of the fixed pedestal 17 projects from the upper surface of the side member 15, and a sensor for detecting that the blank material has been sent to the material pedestal device 3 on the upper surface of the fixed pedestal 17 as shown in FIG. The proximity switch 20 and the electromagnet 21 for adsorbing and holding the blank material on the material receiving device 3 are arranged.

As shown in FIG. 4, a horizontal central shaft 2 is provided at both ends of the rotary pedestals 18 and 19.
The tip screw portion 22A of 2 is screwed and fixed, and the head portion 22B having a circular cross section of the central shaft 22 is rotatably inserted into the hole 23 of the side member 15. As a result, the rotary pedestals 18 and 19 can rotate about the central axis 22 in a vertical plane. The center of rotation A of the rotary pedestals 18 and 19 by the central shaft 22 is eccentric by a from the center B in the height direction of the rotary pedestals 18 and 19.

Further, V-grooves 24 are provided on both end surfaces of the rotary pedestals 18 and 19, respectively.
Are formed continuously in the height direction. A ball plunger 25 is screwed and fixed to each of the side members 15,
The ball plunger 25 has a ball 27 which is constantly urged by a spring 26 toward the end faces of the rotary pedestals 18 and 19. When the rotary pedestals 18 and 19 are rotated about the center axis 22 and the balls 27 are fitted into the V grooves 24, the rotary pedestals 18 and 19 are positioned and held at the rotation angle. Therefore, in this embodiment, the V groove 24
The rotary pedestal positioning means 28 for positioning the rotary pedestals 18 and 19 is constituted by the ball plunger 25 and the ball plunger 25.

The fitting of the ball 27 into the V-shaped groove 24 is performed in two vertical positions in which the rotary pedestals 18 and 19 are rotated by 180 degrees, and this state is the fourth position.
This is shown in FIGS. Rotating pedestal at this time
Due to the eccentricity of B from A, a difference of 2a occurs at the height positions of 18 and 19, as shown in FIG. When the rotary pedestals 18 and 19 are brought into the state shown in FIG. 4, the upper surfaces of the rotary pedestals 18 and 19 reach the same height as the upper surface of the fixed pedestal 17.

Next, the operation will be described.

When the large-area blank material B ₁ shown in FIG. 2 is sent from the material feeding device 2 to the material receiving device 3, the rotary receiving devices 18, 19 are set in the state shown in FIG. As a result, the blank material B ₁ can be placed on the material cradle device 3 while preventing the ends from hanging down, and the blank material B ₁ can be reliably clamped by the fingers 13 when the two feed bars 9 approach each other. Can be done.

On the other hand, when the blank material B ₂ having a small area is sent to the material cradle device 3, the operator manually rotates the rotary cradle 18, 19 by 180 degrees to obtain the state of FIG. As a result, the rotary cradle 1
Since the height position of the 8 and 19 is low, the blank B ₂ is clamped by the fingers 13 of the feed bar 9 the adjustment of the approach distance (the inner width adjustment) is performed size of the blank B ₂ and correspondingly At this time, the finger 13 can be clamped without interfering with the rotary pedestals 18 and 19.

When a blank material of an intermediate size between the large-area blank material B ₁ and the small-area blank material B ₂ is sent, the rotary receiving table 18 is set to the state shown in FIG. The state shown in FIG. 5 may be set.

Even if blank materials of different sizes are sent to the material cradle device 3 as described above, the size of the blank material receiving portion of the material cradle device 3 can be increased by the simple operation of rotating the rotary cradle units 18 and 19. The workability can be improved by changing the height and performing the work easily and in a short time. Further, since the rotary pedestals 18 and 19 are only rotated and are not removed from the work cradle device 3, there is no need to store and manage the rotary pedestals 18 and 19. Furthermore, although the blank material B ₂ having a small area is sent to the material cradle device 3, the rotary cradle
Even when the rotation of the balls 18 and 19 is forgotten and the state shown in FIG. 4 is set, the fingers 13 interfere with the rotation receiving bases 18 and 19 when the feed bar 9 approaches the rotation receiving bases 18 and 19, so that the balls 27 can be moved. Since it rotates while retracting against the spring 26, it is possible to prevent the fingers 13 and the like from being damaged, and
Sensors for interlocking the operation of the press machine are no longer necessary.

In the above embodiment, the rotary pedestals 18 and 19 are arranged in the direction orthogonal to the blank material conveying direction with respect to the fixed pedestal 17, but this arrangement is the direction in which the fixed pedestal is orthogonal to the blank material conveying direction. If it is long, it may be the same direction as the blank material conveying direction, or may be a combination of both, and may be determined according to the direction in which the size of the blank material sent changes. .

Further, in the above-described embodiment, the rotary pedestal positioning means 28 for positioning and holding the rotary pedestals 18 and 19 in two vertical positions is V.
Although it is composed of the groove 24 and the ball plunger 25, the groove 24 and the ball plunger 25 may be composed of, for example, an insertable / removable pin so as to non-rotatably position and hold the rotation receiving base. However, if it is configured as in the above-mentioned embodiment, the above-mentioned effects can be obtained.

[Effect of device]

According to the present invention, the size of the blank material receiving portion can be manually changed to correspond to the size of the blank material, and this changing work can be performed by a simple operation of rotating the rotary table. This can be done and there is no need to attach or remove parts, so workability is improved.

[Brief description of drawings]

FIG. 1 is a plan view of a press machine to which the device according to the embodiment of the present invention is applied, FIG. 2 is a plan view showing the device according to the embodiment, FIG. 3 is a side view of FIG. 2, and FIG. FIG. 5 is a partially sectional front view of FIG. 2, and FIG. 5 is a view similar to FIG. 4 showing a state where the rotary pedestal is rotated. 1 ... Press machine, 2 ... Material feeding device, 3 ... Material receiving device, 4-8 ... Processing stage, 9 ... Feed bar, 13 ... Finger, 17 ... Fixed receiving device, 18, 19 …… Rotary pedestal, 22 …… Center axis, 24 …… V groove, 25 …… Ball plunger, 28 …… Rotary pedestal positioning means, A …… Rotation center,
B: central part in the height direction of the rotary pedestal, B ₁ , B ₂ ... a blank material.

Claims (1)

[Scope of utility model registration request] 1. A material cradle device of a press machine, on which a material fed by a material feeding device is placed and which delivers the material to a feed bar, in a central fixed cradle and on both sides of the fixed cradle. A rotation pedestal rotatably arranged in the plane,
Rotating pedestal positioning means for holding the rotated pedestal in two vertical positions, and the center of rotation of the rotative pedestal is eccentric from the central portion in the height direction of the rotative pedestal. Material support device for press machines.