JPH10180677A - Origin-positioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple origin-positioning device for positioning a workpiece to the origin in a shortened period while preventing dust from sticking to the suction surface of its suction tool. SOLUTION: A positioning device is provided with a suction tool supporter 23 for vertically guiding a suction pad 21 such that the supporter is moved back and forth in the substantially horizontal direction and is pressed froward by means of springs 43. The forward movement of a rod 53 of a horizontally driving cylinder 51 in the positioning device moves the supporter forward by means of the pressing force of the springs until the suction pad reaches a position corresponding to an opening 9 formed in a table 1. The forward movement of the rod then operates a suction tool lifting/lowering device 59 to lift the suction pad, which in turn attracts a workpiece. After the positioning of the workpiece to the origin, the backward movement of the cylinder rod operates the lifting/lowering device to lower or separate the suction pad from the workpiece. A lock member 61 engaging with the supporter moves the supporter back to the retreated position of the suction pad against the pressing force of the springs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for positioning a work origin in a plate processing machine such as a punch press or a laser processing machine.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Utility Model Publication No. Sho 56-30415, an origin positioning device 101 of a plate material processing machine supports a workpiece W as shown in FIG. Opening 1 on table 103
05 is provided to allow the work W to freely protrude from the lower side to the opening 105 and to move the work W in the direction of the origin so as to attract the work W on the table 103 and strike against a predetermined origin such as the locate pin 107. An electromagnet 109 is provided. At the bottom of the table 103 is the table 103
A cylinder 111 is provided that operates substantially parallel to the surface of
A vertically operating cylinder 115 is fixed to the tip of a rod 113 of the cylinder 111. The above-described electromagnet 1 is attached to the tip of the piston rod 117 of the cylinder 115.
09 is fixed.

The piston rod 117 rises from the lower side of the opening 105 of the table 103, and the electromagnet 109
Work S on the table 103 is sucked. Thereafter, the cylinder 111 operates to move the electromagnet 109 in a predetermined origin direction such as the locate pin 107 and the like, and the work W is abutted against the locate pin 107 to position the origin.

[0004] As another example, as disclosed in Japanese Utility Model Publication No. Hei 7-31856, referring to FIG.
The lifting cylinder 121 is fixed to the end of the cylinder 9, and the piston rod 123 of the lifting cylinder 121 is attached to the table 1.
03 can be moved up and down toward the table 103 from above. The piston rod 123 of the lifting cylinder 121
At the lower end, a drawing cylinder 127 provided with a piston rod 125 that operates substantially in parallel with the table 103 is provided. At the tip of the piston rod 125 of the pulling cylinder 127, a suction pad 131 is provided via a pad guide 129 to suck the work W on the table 103.

[0005] A number of free bears 133 are provided on the surface of the table 103, and a locate pin 135 serving as an origin position of the work W is provided so as to be able to protrude and retract upward from the top of the free bear 133.

The work W is transported by a work loading unit (not shown), and is placed on the free bear 133 of the table 103. The work W on the free bear 133 is sucked by the suction pad as the piston rod 123 of the elevating cylinder 121 descends.
Next, the pulling cylinder 127 moves the work W in the direction of the origin so that the work W abuts on the origin position of the locate pin 135. The work W abutted on the locate pin 135 is clamped by the work clamp device 137.

After the suction pad 131 releases the workpiece W, the piston rod 123 of the lifting / lowering cylinder 121 rises and the pulling cylinder 127 returns to the original position, so that the suction pad 131 returns to the original position.

[0008]

In the above-mentioned conventional origin positioning apparatus 101, the electromagnet 1
Since 09 (adsorbing tool) is always in the opening 105 of the table 103, dust, dust such as scraps, whiskers (string-shaped scraps), iron powder, and the like easily accumulate on the attracting surface of the electromagnet 109. Decrease the adsorptivity of
There was a problem that the work W was damaged during the suction.

The latter origin positioning apparatus 101 has the following problems.

Actually, in order to reduce the line tact of the plate material processing line, it is necessary to shorten each step tact of the processing line as much as possible. The origin positioning step of the work W is also a step which affects the line tact of the processing line. The latter origin positioning device 101 has to increase the vertical stroke of the vertical cylinder 121 in order to avoid interference with the work W loading unit. Therefore, there is a problem that it takes a long time for the origin positioning process.

Further, for the reasons described above, there are problems that the cost of the origin positioning device 101 increases and it is difficult to save space.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to reduce the time required for an origin positioning step and to prevent attachment of foreign matter such as dust on the suction surface of a suction tool. Another object of the present invention is to provide an origin positioning device which can be reliably operated by a simple mechanism.

[0013]

According to the first aspect of the present invention, there is provided an origin positioning apparatus according to the first aspect of the present invention, which is capable of protruding from the lower side with respect to an opening provided in a table for supporting a work and is provided on the table. An origin positioning device comprising a suction device for sucking and moving a workpiece in the direction of the origin, wherein the suction device supports the suction device so as to be vertically movable at a position corresponding to the opening, A body is provided so that the body can be moved forward and backward so as to move to a position corresponding to the opening and a retracted position retracted from immediately below the opening, and a bouncing device for urging the suction member support in a forward direction. A positioning device main body including an advance / retreat driving cylinder having a cylinder rod that is movable in the same direction as the advancing / retreating direction of the suction device support; and a work sucked by the suction device to the positioning device main body. A suction cylinder connected to move in the direction of the origin, and a suction tool elevating device for converting a forward movement of the cylinder rod into a lifting movement of the suction tool and converting a retreating movement of the cylinder rod into a downward movement of the suction tool; A locking member that is provided on the support, and engages with the suction support after the suction lowers below the opening to retract the suction support against the urging force of the elastic machine. It is characterized by being provided on the cylinder rod.

Therefore, when the cylinder rod of the advance / retreat drive cylinder moves forward, the suction tool support moves forward by the urging force of the elastic machine, and the suction tool support stops at the position corresponding to the opening. When the cylinder rod further advances, the advancing movement of the cylinder rod is converted into a lifting movement of the suction tool by the suction tool lifting / lowering device, and the suction tool sucks the work on the table. The pulling cylinder pulls the positioning device body to move the work in the direction of the origin.

When the cylinder rod retreats, the retracting movement of the cylinder rod is converted into a downward movement of the suction tool by the suction tool lifting device, and the suction tool separates from the work. After the suction tool is lowered below the opening, the locking member of the cylinder rod is engaged with the suction tool support, and the lowering movement of the suction tool is stopped. The suction tool retreats in opposition and moves to the retreat position from immediately below the opening. The positioning device main body is returned to the original position by the operation of the pulling cylinder.

By the reciprocating motion of the reciprocating drive cylinder, the two operations of the operation of moving the suction tool up and down at a position corresponding to the opening and the operation of retreating and advancing between the position immediately below the opening and the retreat position are reliably performed in order. Done. In addition, since the suction tool moves to the retracted position after the origin positioning is completed, it is difficult for foreign substances such as dust to adhere to the suction surface of the suction tool.

According to a second aspect of the present invention, there is provided an origin positioning apparatus according to the first aspect, wherein the suction device lifting / lowering device is configured to move the suction device below the suction device via a link composed of two arms. And a tip of the cylinder rod connected to a support shaft of the link at a position.

Accordingly, when the cylinder rod moves forward, the two arms of the link extend in a direction approaching a straight line, the suction device rises, and when the cylinder rod retreats, the two arms of the link move.
One of the arms contracts in a direction away from the straight line, and the suction device descends.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an origin positioning device in a sheet material processing machine according to the present invention will be described below with reference to the drawings.

Since plate processing machines such as a punch press, a laser processing machine, and a shearing machine according to the embodiment of the present invention are already known, the description thereof will be omitted, and the origin positioning apparatus according to the embodiment of the present invention will be described. Then, referring to FIG. 1, the plate material processing machine (not shown) is provided with a table 1 on which the work W is placed, and the table 1 has an origin positioning device 3 for positioning the work W at the origin.
Is provided.

A large number of free bears 5 are provided on the upper surface of the table 1, and a locating pin 7 is provided in front of the table 1 in the work loading direction so as to be able to move up and down from the top of the free bear 5 of the table 1. In addition, an origin positioning device 3 is provided near the locate pin 7.

Referring to FIGS. 1 and 2, the table 1 is provided with an opening 9 penetrating downward. The origin positioning device 3 is located near the opening 9 and below the table 1. Is provided.
In the example of the present embodiment, a positioning device main body 13 having an L-shaped cross section is provided on the upper surface of the support member 11 so as to run on the linear guide 15, and the pulling cylinder 17 is also fixed to the upper surface of the support member 11. The positioning device main body 13 is connected to the piston rod 19 of the pulling cylinder 17 so as to be drawn.

The traveling direction of the positioning device body 13 is X
In the axial direction, in front of the X-axis direction (leftward in FIG. 1), a suction tool support 23 that guides the suction pad 21 (suction tool) so as to be able to move up and down is provided so as to be able to advance and retreat in the X-axis direction. The suction tool support 23 has a position where the suction pad 21 corresponds to the opening 9 described above and the opening 9 as a whole.
Can be moved forward and backward so as to move to the retracted position retracted from immediately below.

More specifically, in the example of the present embodiment, the lower part of the suction pad 21 has a suction tool shaft 2 extending downward.
5 are provided integrally. The suction tool support 23 has an inverted U-shaped section, and a pad elevating guide 29 such as a stroke bearing is provided on the upper piece 27 of the inverted U-shaped vertical section.

The suction device shaft 25 of the suction pad 21
Is provided so as to be movable up and down by being guided by a pad elevating guide 29, and the suction surface 31 of the suction pad 21 is configured to be able to protrude from the lower side of the opening 9 of the table 1 upward from the top of the free bear 5 on the upper surface of the table 1. Have been.

Further, the central piece 3 of the suction tool support 23
A plurality of linear shafts 35 project from the front of the linear shaft 35, and the distal end of the linear shaft 35 is inserted into a through hole 39 provided in the wall surface of the vertical piece 37 of the positioning device main body 13, and each linear shaft 35. A stopper 41 having a size larger than the size of the through hole 39 is provided at the front end (rear end).

A spring 43 is wound around each linear shaft 35 as an elastic machine.
The urging tool support 23 is urged forward (to the left in FIG. 1) in the X-axis direction by this, and this urging force is applied to each linear shaft 3.
5 is stopped by the stopper 41. In this stop position, the suction pad 21 of the suction tool support 23 is positioned at a position corresponding to the opening 9 described above.

Further, the lower part of the suction pad 21 is connected to the upper surface of a lower piece 49 of the suction tool support 23 via a link 47 comprising two arms 45. In other words,
One end of one arm 45 of the link 47 is journalled below the suction pad 21, and one end of the other arm 45 of the link 47 is connected to the upper surface of the lower piece 49 of the suction tool support 23.

Further, a cross section L of the positioning device main body 13 is shown.
An advancing / retracting drive cylinder 51 is fixed to the rear wall surface of the vertical piece 37 of the character, and a cylinder rod 53 of the advancing / retracting drive cylinder 51 is provided so as to be able to advance and retreat in the same direction as the advancing / retreating direction of the suction tool support 23. . The tip of the cylinder rod 53 is inserted through the insertion hole 55 of the central piece 33 of the suction tool support 23, and the support shaft 5 of the two arms 45 of the link 47 described above.
7.

The above link mechanism and the forward / backward drive cylinder 51 connected to the link mechanism are connected to the cylinder rod 5
An adsorber lifting / lowering device 59 that converts the forward movement of the suction rod 3 into the upward movement of the suction pad 21 and converts the backward movement of the cylinder rod 53 into the downward movement of the suction pad 21.

That is, when the cylinder rod 53 moves forward, the two arms 45 of the link 47 extend in a direction approaching a straight line to raise the suction pad 21, and the cylinder rod 53
Retreats, the two arms 45 of the link 47 contract in the direction away from the straight line, and lower the suction pad 21.

Further, the cylinder rod 53 is provided with a locking member 61 which engages with the central piece 33 of the suction tool support 23. For example, after the suction pad 21 descends below the opening 9 of the table 1 due to the retraction of the cylinder rod 53, the locking member 61 that abuts on and engages with the wall surface of the central piece 33 of the suction tool support 23. It is fixed to a cylinder rod 53. Therefore, the suction tool support 23
When the cylinder rod 53 is further retracted, it is pressed by the locking member 61 against the urging force of the spring 43, so that the cylinder rod 53 is retracted.

In the above-described embodiment, the suction pad is used as the suction tool. However, another suction tool such as an electromagnet can be used. The suction tool can suction and release the work W. What is necessary is just a thing, and it does not specifically limit.

According to the above configuration, for example, a work positioning device (not shown) provided with a clamp device (not shown) for clamping a work W is provided in a plate material processing machine, and the work W clamped by the clamp device is a work. The table is conveyed on the free bear 5 of the table 1 by traveling of the positioning device. When the tip of the work W comes close to the locate pin 7, the movement of the work positioning device stops, and the clamp device releases the work W.

At this time, as shown in FIG. 3A, the cylinder rod 53 of the advance / retreat driving cylinder 51 is in a retracted state, the suction tool support 23 is also retracted, and the positioning device main body 13 is also moved to the drawing cylinder 17. And the suction pad 21 is located at a retreat position (original position) where the suction pad 21 retreats from immediately below the opening 9. And the suction pad 2
The inside of 1 is already sucked through a pipe communicating with the suction surface 31 and is in a suction-enabled state.

As shown in FIG. 3B, the piston rod 19 of the pulling cylinder 17 advances, the positioning device body 13 advances on the linear guide 15, and the cylinder rod 53 of the advance / retreat driving cylinder 51 advances. I do. When the cylinder rod 53 moves forward, the locking member 6
1 is advanced, the adsorber support 23 is moved by the urging force of the spring 43 to the stopper 41 of the linear shaft 35.
Moves forward until it comes into contact with the wall surface of the vertical piece 37 of the positioning device body 13, and the suction tool support 23 stops at the position where the suction pad 21 corresponds to the opening 9.

As shown in FIG. 3C, the cylinder rod 53 is further advanced and the two arms 4 of the link 47 are moved.
5 extends in a direction approaching the straight line, the suction pad 21 rises, and sucks the work W on the table 1.

Next, as shown in FIG. 3D, the operation of the pulling cylinder 17 causes the positioning device main body 13 to move.
Is pulled back on the linear guide 15 in the X-axis direction, and the work W is moved in the direction of the origin and hits the locate pin 7.

The work W positioned at the origin is clamped by the clamp device, the suction pad 21 releases the work W, and thereafter, the work W is moved and positioned by the work positioning device to the processing section of the sheet material processing machine and processed.

While the workpiece W is being processed, the suction pad 21 of the origin positioning device 3 moves to a retreat position (original position) where the suction pad 21 retreats from immediately below the opening 9.

That is, as shown in FIG.
When the cylinder rod 53 retreats, the two arms 45 of the link 47 contract in a direction away from the straight line, the suction pad 21 descends, and separates from the work W. Suction pad 2
1 is lowered below the opening 9, the locking member 61 of the cylinder rod 53 is moved to the center piece 3 of the suction tool support 23.
3, and the lowering movement of the suction pad 21 is stopped.

At the same time, as shown in FIG. 3A, the suction tool support 23 retreats against the urging force of the spring 43, and the suction pad 21 is retracted from immediately below the opening 9. Move towards. Positioning device body 13
The linear guide 15 is moved by the operation of the pulling cylinder 17.
Since it retreats upward, the suction pad 21 returns to the original position of the retreat position.

As described above, the suction pad 21 is moved up and down at a position corresponding to the opening 9 by the reciprocating operation of one reciprocating drive cylinder 51, and the suction pad 21 is retracted between the position immediately below the opening 9 and the retracted position. -The two operations of moving forward are performed in order and reliably. By the way, conventionally, 1
Only the operation of raising and lowering the suction pad 21 by the two lifting cylinders is performed.

After completion of the origin positioning, the suction pad 2
1 moves to the retreat position below the table 1, so that it is difficult for foreign substances such as dust to adhere to the suction surface 31 of the suction pad 21.

In the above-described embodiment, the suction device elevating device 59 uses a link mechanism. However, as shown in FIGS. 4 and 5, the suction pad 21a is driven up and down by a cam mechanism. A suction device elevating device 59a can also be used. Except for the suction device elevating device 59a, the configuration is the same as that of the above-described embodiment, and only the portions different from those in FIGS. 1 and 2 will be described below.

The upper piece 27 and the lower piece 49 of the suction tool support 23
Is provided with a pinion 63 via a bearing 65 so as to be rotatable in the horizontal direction. The center of the pinion 63 is provided with an insertion hole 6.
The cam roller 6 is provided in the insertion hole 67.
9 or a cam ball (steel ball). On the other hand, a suction tool shaft 71 extending downward is integrally fixed to a lower portion of the suction pad 21a, and a spiral cam groove 73 is formed on an outer peripheral surface of the suction tool shaft 71. The cam groove 73 of the suction tool shaft 71 is engaged with the pinion 63 via a cam roller 69 or a cam ball.

A rack 75 is integrally fixed to the tip of the cylinder rod 53 of the advance / retreat drive cylinder 51 fixed to the positioning device main body 13 so as to extend in the advance / retreat direction of the cylinder rod 53. .

The rack 75 is engaged with the pinion 63, and the cylinder rod 53 of the reciprocating drive cylinder 51
As the pinion 63 rotates forward and backward, the suction shaft 71 is guided by the cam roller 69 of the pinion 63 via the cam groove 73 to move up and down.

The suction pad 21a is configured so that its suction surface 31a can protrude from the lower side of the opening 9 of the table 1 upward from the top of the free bear 5 on the upper surface of the table 1.

The center piece 3 of the suction tool support 23 is attached to the cylinder rod 53 in the same manner as in the embodiment described above.
3 is provided with a locking member 61 that is engaged with the third member 3.

The present invention is not limited to the above-described embodiment, but can be implemented in other modes by making appropriate changes.

[0052]

As will be understood from the above embodiment, according to the first aspect of the present invention, when the cylinder rod of the advance / retreat drive cylinder moves forward, the suction tool support is moved by the urging force of the elastic machine. By moving the suction tool forward, the suction tool support can be stopped at a position corresponding to the opening of the table. By further advancing the cylinder rod, the advancing movement of the cylinder rod is converted into a lifting movement of the suction tool by the suction tool lifting device, the suction tool sucks the work on the table, and the pulling cylinder pulls the positioning device body. Work can be moved in the direction of the origin.

When the cylinder rod moves backward,
The retracting movement of the cylinder rod is converted into the downward movement of the suction tool by the suction tool lifting device, and the suction tool can be separated from the work. After the suction tool is lowered below the opening, the locking member of the cylinder rod is engaged with the suction tool support, and the lowering movement of the suction tool is stopped. Since the suction device retreats in opposition, the suction tool can be moved to the retreat position from immediately below the opening.

Therefore, the two operations of the operation of moving the suction tool up and down at the position corresponding to the opening and the operation of retreating and moving forward immediately below the opening and the retreat position by the reciprocating movement of the reciprocating drive cylinder are performed in order. It can be performed reliably.

Further, as compared with the case of a device in which advancing / retreating and raising / lowering driving are performed by two cylinders, the device of the present invention can reduce the number of actuators and has high operation reliability. Easy to control.

After the end point positioning is completed, the suction tool is retracted to the retracted position, so that it is difficult for foreign substances such as dust to adhere to the suction surface of the suction tool.

According to the second aspect of the present invention, when the cylinder rod moves forward, the two arms of the link extend in a direction approaching a straight line, and the suction tool rises, and when the cylinder rod retreats, the suction tool elevating device moves. This is a simple mechanism in which one arm contracts in a direction away from the straight line and the suction device descends.

[Brief description of the drawings]

FIG. 1 shows an example of an embodiment of the present invention and is a front view including a vertical cross section of a main part of an origin positioning device.

FIG. 2 shows an example of an embodiment of the present invention and is a plan view of an origin positioning device.

FIGS. 3A to 3E are schematic explanatory views showing the operation of the origin positioning device of the present invention.

FIG. 4 shows another example of the embodiment of the present invention, and is a front view including a vertical cross section of a main part of an origin positioning device.

FIG. 5 is a plan view showing a cross section taken along line VV of FIG. 4;

FIG. 6 is a schematic view of a conventional origin positioning device.

FIG. 7 is a schematic diagram of another origin positioning device of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Table 3 Origin positioning device 7 Locating pin 9 Opening 11 Support member 13 Positioning device main body 17 Pulling cylinder 21 Suction pad (suction device) 23 Suction device support 31 Suction surface 35 Linear shaft 43 Spring (elastic machine) 47 Link 51 Elevating drive cylinder 53 Cylinder rod 57 Support shaft (of arm 45) 59 Suction device elevating device 61 Locking member

Claims (2)

[Claims] 1. An origin positioning device comprising: a suction tool for adsorbing a work on a table and moving in the direction of an origin by freely projecting from a lower side with respect to an opening provided in a table for supporting the work. An adsorber support for guiding the adsorber up and down at a position corresponding to the opening; and evacuation of the adsorber support from the position corresponding to the opening and directly below the opening. An advancing / retracting drive cylinder having a reciprocatingly movable cylinder and a resilient device for urging the adsorber support in the forward direction, and having a cylinder rod movable in the same direction as the adsorber support retreats A pulling cylinder connected to the positioning device main body to move the work sucked by the suction tool in the direction of the origin; and a forward movement of the cylinder rod. A suction device lifting / lowering device that converts the upward movement of the suction device and the retraction movement of the cylinder rod into a downward movement of the suction device is provided on the suction device support, and suction is performed after the suction device descends below the opening. An origin positioning device, characterized in that a locking member is provided on the cylinder rod for engaging the tool support and retreating the suction tool support against the urging force of the elastic machine. 2. The suction device lifting / lowering device connects the suction device to a suction device support at a position below the suction device via a link composed of two arms, and the cylinder rod is attached to a support shaft of the link. 2. The origin positioning device according to claim 1, wherein the distal ends are connected.