JPH0220629A - Two blank discharging mechanism - Google Patents

Abstract

PURPOSE:To quickly discharge a blank and to miniaturize a device by arranging a group of inclined rollers under a shoot at a position facing an opening and projecting the group of rollers into the upper part of a shoot in turning and inclining the shoot. CONSTITUTION:A sucking tool 4R are provided on vertical plates 13 of the shoot 10 and a central opening part 16 is formed between the vertical plates 13. Then, a lifting table 31 is provided so that it can go up and down and plural group 40 of inclined rollers are arranged under the table. When two blanks W detected are positioned in the center of a stage center P2, a table 31 rises and the sucking tool 4 sucks the blank W. Then, when the table 31 falls, the blank W moves to the projecting group 40 of rollers and is discharged to a bucket 6. Since the blank W is discharged by the group of rollers through natural fall, the discharge is quickened. Since the angle of inclination is small, the total device is miniaturized.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a two-sheet ejection mechanism.

In particular, it is used as a component of a blank supply device that supplies blanks to a press machine.

[Prior Art] Transfer presses and the like are equipped with a blank supply device in order to improve production and automate the production.

One such feeding device is one that combines a day stack feed means and an intermediate conveyance means.

The day stack feed means takes out one blank from a plurality of stacked blanks using a suction means and delivers it to the intermediate conveyance means. On the other hand, the intermediate conveyance means pitch-feeds the taken blanks and conveys them sequentially to the press. do.

By the way, no matter how elaborately the daystack feed means is configured, two or more blanks may be adsorbed by the adsorption means depending on conditions such as the form and surface condition of the blanks.

Therefore, a two-sheet detection means is installed near the suction means, and when it is detected that two or more blanks are suctioned,
A two-sheet ejection mechanism is configured to eject the blanks.

Here, the conventional two-sheet ejection mechanism is generally formed to include a flat chute for placing blanks, one end of which is rotatably supported by the machine body, and a driving means for rotating and tilting this chute. .

Therefore, when a plurality of blanks are placed on the chute, the driving means is activated. As a result, the blanks slide on the surface of the inclined chute and fall into packets for collection.

[Problems to be Solved by the Invention] However, the conventional two-sheet ejection mechanism described above has the following problems.

That is, since the blank is slid and discharged while making surface contact with the inclined chute, the inclination angle of the chute must be wide, for example, 30 degrees.
Therefore, the installation space is large, and this also affects the layout of the separation device and the intermediate conveyance means that constitute a part of the day stack feed means, leading to an increase in the size of the equipment.

Furthermore, depending on the surface condition and form of the blank, its natural falling condition varies and is unstable. As a solution to this problem, it may be possible to further increase the angle of inclination of the chute.

However, in this case, the movable stroke of the drive means becomes excessive, resulting in an increase in installation space.

In particular, from the viewpoint of the current demand for speeding up press working, widening the angle of inclination and increasing the movable stroke of the drive means prolongs the two-sheet ejection time and is not a fundamental solution.

SUMMARY OF THE INVENTION An object of the present invention is to provide a two-sheet ejecting mechanism that requires a small installation space and can perform high-speed followability and smooth ejection.

[Means for Solving the Problems] The present invention focuses on the fact that reducing the angle of inclination of the chute is extremely effective in reducing the installation space and achieving high-speed tracking.
It is designed so that it can be smoothly discharged while reducing its size.

That is, in a two-sheet discharge mechanism formed to include a chute for placing blanks, one end of which is rotatably supported by the machine body, and a driving means for rotating and tilting this chute, the chute has an opening of a predetermined width extending in the blank transport direction. forming a section, and disposing a group of pre-inclined rollers below the chute at a position facing the opening, and when the chute is rotated and tilted by the driving means, the roller group passes through the opening and exits the chute. It is also configured to protrude upward to achieve the above object.

[Effect]

According to the present invention having the above configuration, when the chute is tilted by the driving means, the roller group, which is arranged in advance at a small angle, projects upward from the opening of the chute. The blank is transferred from the chute to a set of rollers. Therefore, the blank is discharged downward stably and smoothly at high speed by utilizing the rolling motion of the roller group.

[Embodiment] Hereinafter, a preferred embodiment of the two-sheet ejection mechanism according to the present invention will be described in detail with reference to the drawings.

First, in order to understand the usage and essential functions of this mechanism, an outline of the blank feeding device in this embodiment will be described.

In FIG. 4, the blank supply device is roughly divided into a day stack feed means 50 and an intermediate conveyance means 60, and supplies blanks one by one to a transfer press 70 at predetermined timings.

The day stack feeding means 50 has a transfer device 52 consisting of a chain conveyor that horizontally transfers a plurality of blanks W from a replenishment position C to a day stack center P1. and a lift table 5 that can be raised and lowered to the day stack center P1.
5 is provided. Further, a front stopper adjusting device 253 and a centering device 54 are arranged opposite to each other with the day stack center P1 at the center. In addition, these devices 53.
On the upper side of 54 is a blank quantitative holding device 56. A blank separating device 57 is provided.

A suction device 59 consisting of a vacuum cup that can be moved up and down along the day stack center P1 holds the uppermost single blank W separated by the separation device 57 on the conveyance line L.

The two-sheet detection device 58 detects whether the number of blanks W held by the suction device 59 on the conveyance line L is two or more, and when it is detected that the number is two or more, This is to give a drive signal to the two wood ejector #J5.

Therefore, from the replenishment position C, the lifter 51. Transfer device 52
The blank W supplied using the lift table 55
The front stopper adjustment device 5 is lifted upward as shown in the figure.
3 and the centering device 54 cooperate with each other. Thereafter, the samples are held in a quantitative holding device 56 and separated one by one by a separating device 57. The separation device 57 of this embodiment includes a plurality of magnets.

The magnetically separated uppermost blank W is sucked by the vacuum cup of the suction device 59 that has descended, and is pulled up to the conveyance line L. Here, the two-sheet detection device 59 is activated to check the number of blanks that are being sucked.

When there is only one sheet, the sheet is conveyed in pitch by the intermediate conveyance means 60 to a transfer press 70 (in the figure, 71 is a transfer feed means, 72 is a mold, and 73 is a bolster).

In other words, the intermediate conveyance means 60 moves the blank W that has been adsorbed by the suction device 59 and the elevating body 63 that moves the movable body 62 and vacuum cup 64 up and down between the conveyance line L and the holding member 61, which reciprocates with a constant stroke. It is composed of gripping jaws 65 and the like. Therefore, each idle stage center P2 . P3. The workpiece W can be transported at a predetermined pitch for each P4. The transfer feed means 71 transports the press from the final idle stage P5 to the press first stage center S.

Here, the first idle stage P2 is provided with a two-sheet discharge mechanism 5, which discharges two or more stacked blanks W onto a baguette 6. 2
and 3 are the support and bracket of the fuselage, respectively.

Now, as shown in FIG. 1, which is a side view, and FIG.
0, and a group of pre-inclined rollers 40.

The chute 10 consists of horizontal frames 11, 14 extending in the width direction (horizontal direction in FIG. 2) and a plurality of vertical plates 13, 13 . It is formed from ... and has a structure similar to a flat plate as a whole.

Under normal conditions, it is maintained at the same height as the flat plate-shaped holding member 61 (see FIG. 4).

Rollers 12 , 12 are provided at both ends of the horizontal frame 11 for rotationally supporting the support 2 which is a part of the fuselage 1 .
A rotating shaft 15 for rotationally connecting with the driving means 20 is formed on one side of the rotating shaft 15 .

The plurality of vertical plates 13, 13... are spaced apart in the width direction in order to form a plurality of openings 16, 16... that penetrate vertically. The vertical plate 13 is provided with suction devices (electromagnetic magnets in this embodiment) 4R, 4R, . . . symmetrically with respect to the second idle stage center P2.

In addition, a plurality of electromagnetic magnets 4 are provided in the central opening 16.
An elevating table 31 to which V, 4V, . . . is fixed is arranged to be movable up and down. That is, the elevating table 31 forming the elevating device 30 is lifted to the conveying line L to pick up the blank W held between the grip jaws 65 of the intermediate conveying means 60, and after being attracted by the electromagnetic magnets 4V, 4V... , the blank W is lowered so as to be placed on each vertical frame 13.

The lifting table 31 is raised and lowered by a cylinder 32 (rod 33) that is not attached to the lower end 17 that forms a part of the chute 10.
(through hole 19). In addition, 34
．． 34 is a guide rod that is slidably guided by the bushing 18.18, and 35.35 is a cushioning material.

The driving means 20 also includes a cylinder 22 whose base end is rotatably supported by a support shaft 24 on a bracket 3 that is a part of the m body 1, and a rod 21 whose distal end has a hole 23 into which the rotation shaft 15 is fitted.
It consists of a cylinder device formed from. The illustrated state in FIG. 1 shows the normal state in which the chute 10 is maintained horizontally. Therefore, if the rod 21 is made to protrude from this normal state, the chute 10 will rotate around the roller 12 as shown by the two-dot chain line. Can be tilted.

Next, the roller group 40 is composed of a plurality of rollers 42, 42, . Each roller group 40 is disposed below the chute 10 under normal conditions and is tilted in advance at a position facing each opening 16 . In this embodiment, as shown in FIG.
is said to be 5 degrees.

Therefore, if the chute 10 is tilted by the driving means 20 and the tilt angle θ is 5 degrees or more, each roller group 40 will project upwardly from the chute 10 through each opening 60 as shown by the dotted chain line. be able to.

In addition, 56 is a cylinder device arranged closely.

A schematic configuration of a blank quantitative holding device including a guide rod etc. is shown.

Next, the operation of this embodiment will be explained.

It is assumed that two or more blanks W detected by the two-sheet detection device 58 are positioned on the transport line L with the first idle stage center P2 as the center by the intermediate transport means 60.

Further, it is assumed that the chute 10 is in a normal state.

Then, the elevating device 30 is driven based on a signal from a control device (not shown), and the elevating table 31 is moved to the position shown in FIG.
). Subsequently, an electromagnetic magnet, which is a suction tool 4V attached to the elevating table 31, is activated to suction the blank W held between the gripper J-65. Cylinder device 30 (32, 33) after adsorption
operates in reverse to lower the elevating table 31. The blank W is placed on the chute 10 and the electromagnetic magnets 4R, 4
6 electromagnetic magnets 4V, 4V stably held in a predetermined position by R... are inoperative, and the lifting table 31
lowers into position. That is, the state shown in FIG. 3(B) is reached.

Then, in the normal case, the intermediate conveying means 60
The blank W is pitch-conveyed to the second idle stage center P3, but since the two-sheet detection device 58 has previously detected and determined that two or more sheets overlap, the blank W is discharged to the baguette 6. There must be.

Here, as shown in FIG. 3(C), the driving means 20 is operated to tilt the chute 10 and to disable the electromagnetic magnets 4V, 4V, . . . . shoot 10
When the inclination angle becomes close to the inclination angle (5 degrees) of the inclined roller group 40, the rollers 12 of each roller group 40 sequentially close the opening 16.
It protrudes above the chute 10 through it. At this stage, even if there is residual magnetism in the electromagnetic magnets 4V, 4V, the blank W can be pulled away from the top of the chute 10 by the protruding action of each roller 42, and as a result, the blank W can be pulled away from the top of the chute 10 by the rollers. It can be transferred onto group 40.

Therefore, the blank W naturally falls smoothly and quickly in the direction of the arrow Y in a stable posture due to the rolling motion of each roller 42, and is discharged onto the baguette 6.

According to this embodiment, since the inclined roller group 40 is provided which protrudes upward from the chute 10 when the chute 10 is tilted, the blank can be stabilized at high speed by rolling motion of the rollers 42. The emission of W can be achieved.

Furthermore, since it utilizes rolling motion, when comparing the same blank, the inclination angle of the conventional chute was, for example, 30 degrees, but it was possible to allow it to fall smoothly and naturally at an inclination angle of 5 degrees. Therefore, it is possible to reduce the size and the installation space, and it is also possible to reduce the size of the entire supplying device without placing excessive restrictions on the layout of, for example, the quantitative holding device.

Also, since the inclination angle can be reduced to 1/6 or less of the conventional one,
This is not only economical but also allows for faster speeds without increasing the size of the drive means 20, etc., so the loss time of the blank feeding device as a whole is shortened, and as a result, it is extremely effective for speeding up press processing6. When Spm (number of continuous strokes) is 3O3pm, the blank must be accepted into the chute 10, discharged into the packet 6, and returned to the steady state of the chute 10 within 2 seconds. For small projects, these time requirements can be easily met. Moreover, the driving means 2
0 etc. can also be miniaturized and is economically advantageous.

Furthermore, since the roller group 40 or the roller group 40 protrudes through its opening 16 as the chute 10 inclines, even if the electromagnetic magnets 4R, 4R, .
Even if there is residual magnetism, the blank W can be easily separated from the chute 10, and from this point of view as well, the free fall of the blank W can be ensured and facilitated.

In the above embodiment, the inclination angle of the inclination roller group 40 was set to 5 degrees, but these numerical values and the number of installations are not limited to the above disclosed range and can be arbitrarily determined.

Moreover, the inclination angle of the roller group 40 can also be formed to be adjustable.

[Effects of the Invention] As is clear from the above description, the present invention has a structure in which a group of rollers is preliminarily disposed at an angle below a chute having an opening so as to be able to project upward from the chute, so that the following effects are achieved.

■ Since it utilizes the rolling motion of the roller group, stable, reliable and quick blank ejection can be achieved.

■ Since the inclination angle of the roller group is small, the driving means can be downsized, and the chute can be tilted and reciprocated at high speed. As a result, it can greatly contribute to speeding up press processing.

■ It can be quickly discharged without being affected by the residual magnetism of the electromagnetic magnet in the chute, and the inclination angle of the roller group and the chute can be made small, so there is no restriction on the layout of the blank metering holding device, etc., and the entire blank feeding device can be Miniaturization can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of the two-sheet ejection mechanism according to the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a diagram for explaining the operation, and FIG. 4 is a diagram of the present mechanism. FIG. 2 is a side view of the entire blank supply device incorporating the. ■...Body, 5...Two-sheet ejection mechanism, 6...Packet, 10...Chute, 16...Opening, 20...
- Drive means, 30... Elevating device, 31... Elevating table, 40... Roller group, 42... Roller, 50...
... day stack feed means, 60 ... intermediate conveyance means, 70 ... transfer press. Figure 3

Claims (1)

[Claims] (1) In a two-sheet discharge mechanism formed by including a chute for placing blanks, one end of which is rotatably supported by the machine body, and a drive means for rotating and tilting this chute, the chute has a predetermined width extending in the blank transport direction. an opening is formed, a group of rollers inclined in advance is disposed below the chute at a position facing the opening, and when the chute is rotated and tilted by the driving means, the roller group passes through the opening and the chute A two-sheet ejecting mechanism characterized by being configured to protrude upwards.