JPH02243430A - Blank takeout - Google Patents

Abstract

PURPOSE:To make this adjusting work simply and quickly performable by installing a control means for driving a turning drive means according to a stored setting turning angle, and adjusting a position of a suction cup. CONSTITUTION:When either blank is specified, each of turning drive means M1, M2 and M3 is driven by a control means 90 according to setting turning data stored in a memory part 94. This drive rotates a gear, and a clutch member in mesh with this gear is moved in a direction orthogonal with an axis of a lifting shaft. With this movement, a position of a suction cup installed in a rack member is adjustable automatically in a stepless manner. After this adjustment, selector valves 75, 84 are transferred, and upward air is led into one side chamber of cylinder chambers, shifting a piston, and a pressing member is pressed to a rack member supporting block, thereby locking the rack member tight.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a blank take-out device that takes out blanks one by one from a blank supply device. Specifically, the blank extraction device is capable of automatically and steplessly adjusting the position of the suction cup from which the blank is taken out.

[Prior Art] When supplying blanks to a press, the blanks stacked on a blank supply device are sucked and taken out one by one by a blank take-out device, and the blanks are transferred to a feed bar via an intermediate conveyance device. is taken.

By the way, as a blank take-out device, one in which the position of a suction cup can be changed is known so as to be able to handle various irregularly shaped blanks or blanks with holes.

For example, the f-blank take-out device disclosed in Japanese Utility Model Application Publication No. 62-38238 is constructed as follows. That is, the main suction cup is attached to the lower end of the shaft that is moved up and down relative to the blank at a position corresponding to the approximate center of the blank, and the frame is attached at a position slightly above the main suction cup.

The frame is provided with a pair of racks slidably in a direction orthogonal to the axis of the shaft at the upper front and back positions, and a pair of guide rods are provided at the lower front and rear positions so as to be parallel to and slidable with the racks. Racks and guide rods corresponding to the upper and lower sides are formed into sets, respectively, and each set is made to protrude in the left-right direction of the frame. Then, a sub-suction cup is attached to the protruding end of each set.

A binion that meshes with each rack and has a spline hole in the center is rotatably provided on the frame, and a fixing ring with a spline hole in the center is fixed in the frame. A spline shaft is provided that meshes with the binions and only meshes with the spline hole of the binion when the rack is moved.

In such a configuration, if the spline shaft is engaged only with the spline hole of the binion and then the spline shaft is rotated, the rack will move via the binion in a direction perpendicular to the axis of the shaft. The position of the cup, ie the distance from the main suction cup, can be adjusted.

After adjustment, when the spline shaft is engaged with the binion and the fixing ring, the rotation of the binion is regulated via the fixing ring and the spline shaft, so that the rack, that is, the sub-suction cup can be locked in that position.

[Problems to be Solved by the Invention] In the conventional blank take-out device, when adjusting the position of the sub-suction cup, the operator has to manually adjust the position, so there is a problem that the adjustment work is troublesome and time-consuming. Ta.

Moreover, because the structure is such that the spline shaft that meshes with the spline hole of the binion is locked by meshing with the spline hole of the fixing ring, the position of the sub-suction cup can only be adjusted for each tooth pitch of the spline shaft. In such a stepwise adjustment for each tooth pitch, it may be impossible to align the position of the sub suction cup with the irregularly shaped blank, or to move it out of the hole of the perforated blank.

In addition, even in the locked state where the spline shaft is engaged with the binion and fixing ring, backlash between the fixing ring and the spline shaft, between the spline shaft and the binion, and between the binion and the rack can cause the rack to become clogged with the secondary suction cup. The problem is that it cannot be locked reliably.

SUMMARY OF THE INVENTION An object of the present invention is to provide a blank take-out device that can solve the problems of the conventional art, automatically and steplessly adjust the position of a suction cup, and securely lock the suction cup after adjustment. Our goal is to provide the following.

[Means for Solving the Problems] Therefore, the present invention provides an elevating cylinder in which a piston having an elevating shaft moves up and down while air for elevating is constantly supplied during blank takeout operation, and an elevating shaft of this elevating cylinder. a rack member having a support block provided on the support block, a suction cup provided on the support block so as to be slidable in a direction perpendicular to the axis of the lifting shaft, and a rack member meshed with the rack member and attached to the support block. A gear rotatably provided, a rotation drive means for rotating the gear, a cylinder chamber formed in the support block, and a rack member slidably housed in the cylinder chamber and mounted on the support block. A piston having a pressing member for pressing, and one chamber defined within the cylinder chamber by the piston for moving the piston in a direction in which the pressing member presses the rack member, and lifting air supplied to the lifting cylinder. an air supply path that introduces the air through a switching valve, and a storage unit that stores rotation angle setting data of the rotational drive means corresponding to multiple types of blanks, and when any blank is specified, the blank control means for driving the rotation drive means according to set rotation angle data stored in a storage unit corresponding to the above, and then operating the switching valve to introduce the rising air into the one chamber; It is characterized by the following:

[Operation] When any blank is designated, the rotational drive means is driven according to the set rotation angle data stored in the storage unit corresponding to that blank. Then, since the gear rotates, the rack member meshing with the gear is moved in a direction perpendicular to the axis of the elevating shaft. Therefore, the position of the suction cup provided on the rack member can be automatically and steplessly adjusted.

After the adjustment, the switching valve is operated to introduce rising air into one of the cylinder chambers. Then, the piston moves, and the pressing member presses the rack member against the support block to lock the rack member. Therefore, locking after adjustment can be performed reliably.

[Example] Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a longitudinal sectional view, and FIG. 2 is a sectional view taken along the line ■--■ in FIG. In these figures, 11 is an elevating shaft that is moved up and down by a day stack cylinder (71 in FIG. 5) which will be described later. A rotating shaft 13 is connected to the lower end of the lifting shaft 11 via a connecting member 12 so as to be rotatable about the axis of the lifting shaft 11.A rectangular parallelepiped-shaped rotary shaft 13 is connected to the lower end of the lifting shaft 11 so as to be rotatable about the axis of the lifting shaft 11. A support block 14 is fixed.

At the center of the lower surface of the support block 14, that is, on the axis of the elevating shaft 11, a mounting shaft 16 having a flange is provided so as to be slidable in the vertical direction via the cup holder 15. A spring 17 is interposed between the lower end flange of the cup holder 15 and the flange of the mounting shaft 16 to constantly bias the mounting shaft 16 upward.

A main suction cup 18 that opens downward is attached to the lower end of the mounting shaft 16, and the negative pressure air introduced into the air supply pipe 19 of the support block 14 along the central axis direction is A conduit 20 leading to the main suction cup 18 is formed.

Also, a pair of rack members 21A penetrate through both side surfaces of the support block 14 and have racks 22A and 22B on the upper surface side.
, 21B are provided so as to be slidable in a direction perpendicular to the axis of the elevating shaft 11, that is, in the left-right direction in FIG. Each rack member 21A, 21B has a cup holder 23A at its tip.

A sub-suction cup 24A that opens downward via 23B,
24B is attached, and a protrusion 25 is attached to the proximal end.
A and 25B are provided. Each sub-adhesion force/tube 24A
, 24B, negative pressure air is introduced through piping 26A, 26B. The protrusions 25A, 25B slide within guide guides 27A, 27B formed on the support block 14, and stopper surfaces 28A, 28 on the inner wall thereof.
B and serves to prevent each rack member 21A, 21B from falling off.

In addition, the racks 22A and 2 of each rack member 21A and 21B are
Gears 31A and 31B that mesh with 2B are shafts 32A and 32B.
It is rotatably supported within the support block 14 via. The gears 31A, 31B and the shafts 32A, 32B are integrally fixed by screws 33A, 33B, as shown in FIG. Both ends of each shaft 32A, 32B are rotatably supported by the front and rear walls of the support block 14, and the front end surface is provided with a groove 34A, 34B passing through the center of the shaft 32A, 32B.

Output shafts of first and second motors M and M2 fixed to the front side of the support block 14 are engaged with each of the recessed erasers 34A and 34B. Therefore, the first and second motors M,
When M2 is rotated, the gear 3 is rotated through the shafts 32A and 32B.
Since gears 1A and 31B rotate, the gears 31A and 31B
The rack members 21A and 21B that mesh with the rack members 21A and 21B are moved in the left-right direction in FIG. In other words, the sub suction cups 24A, 24B
is moved in the left-right direction in FIG.

Further, a cylinder chamber 41 is formed in the support block 14 at an intermediate position between the gears 31A and 31B. Inside the cylinder chamber 41, a piston 42 is disposed on the lifting shaft 1.
It is housed so as to be slidable in the axial direction of 1. piston 4
A pressing member 43 that straddles the pair of rack members 21A, 21B and presses the rack members 21A, 21B against the bottom wall of the support block 14 is integrally connected to the lower surface of the support block 2. A spring 44 that biases the piston 42 upward is interposed in the lower chamber 41D of the cylinder chamber 41 divided by the piston 42, and a spring 44 is installed in the upper chamber 41U along the central axis direction of the rotation shaft 13. The lower end of the communicating hole 45 formed through the hole is open. Note that the upper end of the communication hole 45 opens into an air distribution chamber 46 formed between the elevating shaft 11 and the rotation shaft 13.

A worm wheel 51 is fixed to the outer periphery of the upper end of the rotating shaft 13, and a worm 52 that meshes with the worm wheel 51 is rotatably provided within the connecting member 12.

A shaft 53 is fixed to the center of the worm 52 with a screw 54, as shown in FIG. A groove 55 passing through the center of the shaft 53 is formed on the front end surface of the shaft 53, and a piston 56 is formed at the rear end. The piston 56 is connected to the cylinder chamber 5 formed in the connecting member 12.
7 and is slidably housed within the holder. One chamber 58 of the cylinder 57 partitioned by the piston 56 is communicated with the air distribution chamber 46 through a conduit 59.

The output shaft of a third motor M fixed to the front side of the connecting member 12 is engaged with the groove 55 . Therefore,
When the third motor M3 is rotated, the worm 52 is rotated via the shaft 53, so that the worm wheel 51 that meshes with the worm 52 is rotated. Then, rotation axis 1
3, the support block 14 is rotated about the axis of the lifting shaft 11. In other words, the sub suction cups 24A, 24
B is rotated about the axis of the lifting shaft 11.

At this time, the rotation angle of the support block 14 is determined from the scale ring 61 fixed to the lower outer circumference of the rotation shaft 13 and having a scale on the outer circumference and the pointer 62 fixed to the connecting member 12. , 24B can be confirmed.

Further, lifting air is introduced into the air distribution chamber 46 through a conduit 70 formed in the lifting shaft 11 to be supplied to a day stack cylinder 71 as a lifting cylinder shown in FIG. In FIG. 5, a piston 72 connected to the upper end of the elevating shaft 11 is slidably housed inside a day stack cylinder 71.

An output port of a 3-bot 2-position switching valve 84 is connected to a lower chamber 71D of the cylinder 71 divided by the piston 72 via a parallel circuit of a variable throttle valve 81 and a check valve 82 and a buffer tank 83. ing. 3-bottom 2-position switching valve 8
4, the air pressure source 77 is connected to the boat via a pressure reducing valve 85.
is connected to the output boat, and a conduit 70 provided on the lifting shaft 11 is also connected to the output boat via an air supply path 86. Therefore, during the blank removal operation when the 3-bottom 2-position switching valve 84 is switched to the Aa position, air from the air pressure source 77 is constantly supplied to the crown 71D of the cylinder 71, and the air is constantly supplied to the cylinder 41 through the air distribution chamber 46. One chamber 58 of the upper chamber 41U and the cylinder chamber 57
Also supplied.

Further, the upper chamber 7 of the cylinder 71 is partitioned by the piston 72.
An output port of a 3-bot 2-position switching valve 75 is connected to 1U via a parallel circuit of a variable throttle valve 73 and a check valve 74. An air pressure source 77 is connected to the input port of the three-bottom, two-position switching valve 75 via a pressure reducing valve 76 . Therefore, with the rising air constantly supplied to the lower chamber 71D of the cylinder 71, the 3-bot 2-position switching valve 75 is
When the piston 72 is switched between the position and the B position, the piston 72 is moved up and down.

FIG. 6 shows the motors MI, M2, Ms and the switching valve 7.
5.84 is shown. In the figure, 91 is a CPU. The CPU 91 has an RO that stores programs via an address/data bus 92.
M93, RAM 94 as a storage unit, input device 95 for specifying any blank, and I10 boat 9
6.97 are connected respectively.

The RAM 94 stores the set rotation angles α1 to α4 of the motor M, the set rotation angles β, to β of the motor M2, and the set rotation angles β, ~β of the motor M, corresponding to the plurality of types of blanks NO1 to N04.
, the set rotation angles γ1 to γ4 are stored, respectively.

In addition to the 3-bottom, 2-position switching valve 75 and the 3-bottom, 2-position switching valve 84, the I10 boat 96 includes a lift limit detection switch 101 that detects when the day stack cylinder 71 has reached its lift limit. and day stack cylinder 7
A lower limit detection switch 102 for detecting that 1 has reached the lower limit is connected to each of the lower limit detection switches 102.

The I10 boat 97 includes each of the motors M1M 2
, Ms, a rotation angle detector 103 that detects the rotation angle of the motor M1, a rotation angle detector 104 that detects the rotation angle of the motor M2, and a rotation angle detector 105 that detects the rotation angle of the motor M3. It is connected.

Note that the operation of the CPU 91 will be explained based on FIG. 7 in the following operation.

Next, the operation of this embodiment will be explained.

During the blank take-out operation, the CPU 91 switches the 3-bot 2-position switching valve 75 with the 3-bot 2-position switching valve 84 switched to the A position, and moves the day stack cylinder 71 up and down to take out the blank. 1 from the blank supply device
When taking out the sheets one by one and adjusting the positions of the sub-suction cups 24A and 24B, the process is executed according to the flowchart shown in FIG.

Okay, when it is recognized that there is a blank designation in step (hereinafter abbreviated as ST) 1, the process proceeds to ST2 and the RAM 94 is
The motor Mr, M2, which corresponds to the specified blank from among them.
Read out the set rotation angle data of Ms. 0 For example, blank N
If o 1 is specified, motors M l, M2, M
Set rotation angle α1°β1. γ1 are respectively read out.

Next, the process proceeds to ST3, where the 3-bot/2-position switching valve 75 is switched to the B position to lower the day stack cylinder 71, and then the process proceeds to ST4, where it is determined whether the day stack cylinder 71 has reached its lowering limit. In other words, the lower limit detection switch 102
Determine whether it is turned on.

In ST4, when it is recognized that the lower limit detection switch 102 is turned on, the process proceeds to ST5 and the three-bottom, two-position switching valve 84 is switched to the B position. Then, the upper chamber 41U of the cylinder chamber 41 is opened to the atmosphere through the air distribution chamber 46, so the piston 42 is moved upward by the action of the spring 44.

That is, the pressing member 43 separates from the rack members 21A, 21B, and the rack members 21A, 21B are released from the locked state. At the same time, one chamber 58 of the cylinder chamber 57 is opened to the atmosphere, so that the worm 52 is released from the locked state.

Next, the process proceeds to ST6 and the first motor M1 is driven.

Then, the gear 31A rotates via the shaft 32A, so
The rack member 21A meshing with the gear 31A is moved in the left-right direction in FIG. In other words, the position of the sub suction cup 24A is adjusted.

Subsequently, in ST7, it is determined whether the rotation angle of the first motor M1 has reached the read set rotation angle. When it is recognized in ST7 that the rotation angle of the motor M has reached the set rotation angle, the process proceeds to ST8 and the first motor M1 is stopped. Therefore, the position of the sub suction cup 24A is automatically adjusted according to the set rotation angle stored in the RAM 94 corresponding to the designated blank.

Subsequently, the process proceeds to ST9 to ST5TII, and the second motor M2 is similarly driven by the set rotation angle.

Therefore, the position of the sub suction cup 24B is automatically adjusted according to the set rotation angle stored in the RAM 94 corresponding to the designated blank.

Next, the process advances to 5T12 and the third motor M is driven. Then, since the worm 52 rotates via the shaft 53, the worm wheel 51 that meshes with the worm 52 is rotated. When the thumb wheel 51 rotates, the support block 14 is rotated about the axis of the lifting shaft 11 via the rotation shaft 13. In other words, the angles of the sub suction cups 24A, 24B are adjusted about the axis of the lifting shaft 11.

Subsequently, at 5T13, it is determined whether the rotation angle of the third motor M3 has reached the read set rotation angle. When it is recognized in 5713 that the rotation angle of the third motor M3 has reached the set rotation angle, the third motor M is stopped in 5T14. Therefore, corresponding to the specified blank, RA
auxiliary suction cup 24A according to the set rotation angle stored in M94.

The angle of 24B is automatically adjusted.

After adjusting the positions and rotation angles of the sub-suction cups 24A and 24B in this way, proceed to 5T15 and set the 3-bottom 2
Switch the position switching valve 84 to the A position. Then, air from the air pressure source 77 is supplied to the crown 71D of the cylinder 71 via the buffer tank 83 and check valve 82.

At the same time, the air supply line 86, the pipe line 70, the air distribution chamber 4
6 to the upper chamber 41U of the cylinder chamber 41 and one chamber 58 of the cylinder chamber 57, respectively.

Then, the piston 42 is lowered against the spring 44 by the air supplied to the upper chamber 41U of the cylinder chamber 41, so that the pressing member 4 connected to the piston 42
3, the pair of rack members 21A and 21B are locked in a pressed state against the bottom wall of the support block 14. On the other hand, since the piston 56 is pressed downward in FIG. 4 by the air supplied to one chamber 58 of the cylinder chamber 57,
The worm 52 is held and locked between the piston 56 and the connecting member 12.

In this state, when the three-bottom, two-position switching valve 75 is operated, the piston 72 of the cylinder 71 is moved up and down, so that the blanks can be taken out one by one by the suction cups 18, 24A, and 24B.

Therefore, according to this embodiment, each motor M1. Drive M2 and Ms, and sub suction cup 2
Since the positions and angles of 4A and 24B are automatically adjusted, adjustment work can be done easily and quickly.

Also, the support block 1 is connected to the lifting shaft 11 via the rotation shaft 13.
4, a main suction cup 18 is provided on this support block 14, and a pair of rack members 21A have sub suction cups 24A and 24B.

21B is provided slidably in a direction perpendicular to the axis of the lifting shaft 11, and gears 31A, 31B that mesh with each rack member 21A, 21B are rotatably provided on the support block 14, so that the gears 31A, 31B When rotated, the sub suction cups 24A, 2 are attached via the rack members 21A, 21B.
4B moves in a direction perpendicular to the axis of the lifting shaft 11, so the position of each sub-suction cup 24A, 24B, that is, the distance from the main suction cup 18, can be adjusted steplessly.

From the main suction cup 18 to each sub suction cup 24A.

After the distance to 24B is adjusted, when the 3-bot 2-position switching valve 84 is switched to the A position, the air pressure 7jI77
Air is supplied to the upper chamber 41U of the cylinder chamber 41. Then, the piston 42 is lowered against the spring 44 by the air supplied to the upper chamber 41U of the cylinder chamber 41, so that the pair of rack members 21A and 21B are pressed against the support block by the pressing member 43 connected to the piston 42. It is locked when pressed to 14. Therefore, locking can be performed easily and reliably.

In addition, the worm wheel 51 is fixed to the rotating shaft 13, and the worm 52 that meshes with the worm wheel 51 is rotatably provided on the connecting member 12, so that when the worm 52 is rotated, Since the moving shaft 13 and the support block 14 rotate around the axis of the elevating shaft 11, the angular position of the sub suction cups 24A, 24B with respect to the main suction cup 18 can be adjusted steplessly.

A secondary suction cup 24A for the main suction cup 18.

After the angular position of 24B is adjusted, when the 3-bot 2-position switching valve 84 is switched to the A position, air from the air pressure source 77 is supplied to one chamber 58 of the cylinder chamber 57. Then, the piston 56 is pressed downward in FIG. 4 by the air supplied to one chamber 58 of the cylinder chamber 57, so that the worm 52 is locked between the piston 56 and the connecting member 12. Ru. Therefore, locking can be performed easily and reliably.

In addition, the upper chamber 41U of the cylinder chamber 41 and the cylinder chamber 5
Since the rising air of the day stack cylinder 71 is used for the air supplied to one chamber 58 of the day stack cylinder 71, in other words, in order to smoothly adsorb the blank, the royal air 71D of the day stack cylinder 71 is always supplied with air during the blank removal operation. Since the supplied lifting air is used, the locked state can be reliably maintained during the blank take-out operation without the need for a special air supply line.

In addition, in the above embodiment, two sub-suction cups 24A, 2
Although we have explained the blank take-out device equipped with 4B, 1
[Effects of the Invention] As described above, according to the present invention, the rotational drive means is operated according to the set rotational angle stored in the storage unit corresponding to a plurality of types of blanks. Since the suction cup is driven and the position of the suction cup is automatically adjusted, adjustment work can be performed easily and quickly. In addition, a rack member having a sub-suction cup is provided on the support block provided on the lift shaft so as to be slidable in a direction perpendicular to the axis of the lift shaft, and a gear meshing with this rack member can be rotated on the support block. At the same time, a piston having a pressing member is slidably housed in a cylinder chamber formed in the support block, and one chamber for moving the piston in a direction in which the pressing member presses the rack member is supplied to the lifting cylinder. Since the lifting air is introduced, the position of the suction cup can be adjusted steplessly, and the suction cup can be reliably locked after adjustment.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a longitudinal sectional view, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a sectional view taken along the line ■-■ in Fig. 1. , FIG. 4 is a sectional view taken along the line IV--IV in FIG. 1, FIG. 5 is a diagram showing the air supply circuit, FIG. 6 is a block diagram showing the control means, and FIG. 7 is a flow chart. DESCRIPTION OF SYMBOLS 11... Lifting shaft, 14... Support block, 21A, 21B... Rack member, 24A, 24B... Sub-suction cup, 31A, 31B... Gear, 41... Cylinder chamber, 41U. ...Upper chamber (one chamber), 42...Piston, 43...Press member, 71...Day stack cylinder, (lifting cylinder), 72...Piston, 84...Switching valve, 86... Air supply path, 90... Control means, 94... RAM (storage unit), M+, M2, Ms... Motor (rotation drive means). Applicant AIDA Engineering Co., Ltd. Agent Patent Attorney Etsuo Nagashima

Claims (1)

[Claims] (1) An elevating cylinder in which a piston having an elevating shaft moves up and down while air for elevating is constantly supplied during blank removal operation; a support block provided on the elevating shaft of this elevating cylinder; a rack member having a suction cup slidably provided in a direction perpendicular to the axis of the elevating shaft; a gear meshed with the rack member and rotatably provided on the support block; a rotational drive means for rotating; a cylinder chamber formed in the support block; a piston that is slidably housed in the cylinder chamber and has a pressing member that presses the rack member against the support block; an air supply path that introduces lifting air to be supplied to the lifting cylinder via a switching valve into one chamber that is partitioned into one chamber and for moving the piston in the direction in which the pressing member presses the rack member; a storage unit storing set rotation angle data of the rotation driving means in correspondence with the seed blank, and when any blank is specified, set rotation angle data stored in the storage unit corresponding to the blank; a control means for driving the rotary drive means according to the above, and then switching the switching valve to introduce the rising air into the one chamber.