JP2000071032A - Work turning around method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work turning around method and a turning around device which selectively turns around a press forming work or enables the work to turn around fast. SOLUTION: This is referred to a press line in which the first press 11, is set up at an upstream side, and the second press 12 at a down stream side, wherein the first carrying means 21 is set up between the first and second presses 11, 12 having a work adsorption means and an endless conveyer which turns in normal, reverse directions freely, and the second carrying means 22 is set up in a way that the down stream end of the first carrying means 21 is wrapped, having a work adsorption means and an endless conveyer which slides up/down freely at the upstream end so that a work 4 can be turned around fast by the first carrying means 21 and the second carrying means 22. Furthermore, since the construction is simple, the device can be offered at low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a work reversing method and a work reversing device for reversing a work between a plurality of presses installed on a press line.

TECHNICAL FIELD OF THE INVENTION

[0002]

2. Description of the Related Art Conventionally, as this kind of work reversing device,
For example, Japanese Utility Model Publication No. 54-26601 and Japanese Utility Model 1-3
What is described in 3242 gazette is publicly known. The work reversing device disclosed in the former publication intermittently rotates a turn arm having an arm in a cross direction to reverse a work supported by each arm. Arm rods having a vacuum cup to be sucked are arranged back and forth, the work is rotated 90 ° by the front arm rod, and then the work is transferred to the rear arm rod, and the work is further rotated 90 ° by the rear arm rod. To reverse the work.

On the other hand, JP-A-2-295620 discloses that
A work reversing device in which both ends of a work are gripped by gripper attachments installed at positions opposite to a transfer bar and the work is reversed by rotating each gripper attachment by 180 °, and Japanese Patent Application Laid-Open No. Hei 8-25239. The upper and lower pallets are fixed by a pallet fixing device provided in a rotating drum that rotates about a horizontal axis, and the rotating drum is rotated in this state, so that the work placed on one pallet is There is described a work reversing device that reverses a work by transferring the work to a pallet.

Japanese Utility Model Publication No. 5-22348 discloses a work reversing apparatus in which one end of a work is clamped to pull out the work from a mold, and a part of the work is placed on a reversing rope to be reversed. Is described as a conventional example.

[0005]

[Problems to be solved by the invention] However, Shoko 54-2
In the work reversing device described in JP-A-6601, it is not possible to perform selective reversal such as reversing or not reversing a work. For example, right parts of left and right parts such as car door parts are not reversed and left parts are not reversed. There is a problem that parts cannot be selected such as flipping.

[0006] In the work reversing device described in Japanese Utility Model Publication No. 1-333242 and Japanese Patent Laid-Open No. 2-295620,
When the size of the work is changed, it takes a lot of time to change the attachment according to the size of the work or to set up the width, and during that time press work cannot be performed and high speed is difficult. In addition to the low productivity, the work reversing device disclosed in Japanese Patent Application Laid-Open No. 2-295620 discloses that when the work is reversed by clamping positions at both ends of the work,
Since the center position of the work is shifted, there is a problem that an operation of correcting the center position of the work after the reversal is required.

On the other hand, the work reversing device described in Japanese Patent Application Laid-Open No. H8-252639 requires a rotary drum, a pallet fixing device, and the like, and the entire device is complicated and large.
There are drawbacks such as requiring a lot of space for installation and making the apparatus expensive.

In the work reversing device described in the conventional example of Japanese Utility Model Publication No. 5-22348, since one end of the work is clamped to be reversed, the work can be reversed in the case of a large work or a work having low rigidity. There is a problem that the work cannot be performed or the work is deformed during reversal.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a work reversing method and a work reversing apparatus capable of selectively reversing a work to be press-formed or reversing at a high speed. It is assumed that.

[0010]

Means for Solving the Problems and Effects of the Invention To achieve the above object, the invention according to claim 1 is provided between a first press installed on the upstream side and a second press installed on the downstream side. , Endless conveyors, and first and second transfer means having a work suction means are disposed in front and back of the first and second transfer means.
When the work is inverted and carried in when the work is carried into the second press from the first press by the second transport means,
When the work is sucked to the lower side of the first transporting means which has been reversed and transported to the second transporting means, and the workpiece is transferred to the upper side of the second transporting means whose upstream end has been lowered, the forwardly rotated 2
In the case where the work is sucked to the upper side of the transfer means and the work is carried into the second press, and the work is carried in without being inverted, the work is sucked to the upper side of the first transfer means which has been normally rotated and the second work is sucked. When the workpiece is transferred to the upper side of the second transporter, which transports the workpiece to the second transporter and raises the upstream end to almost the same height as the first transporter, the upper edge of the second transporter that has been rotated forward The work is sucked to the side and the work is carried into the second press.

According to the above-mentioned method, since the workpiece can be selectively inverted such as inverted or not, even when processing a part with a wrong right and left such as a door part of an automobile, the rotation of the first and second transfer means can be performed. It is possible to respond only by changing the direction, whereby the setup time can be greatly reduced and the productivity can be improved accordingly.

In addition, since the work can be inverted while being transferred, the work can be transferred at a high speed and reversed at a high speed, thereby improving the operation rate of the press and the productivity associated therewith.

In order to achieve the above object, the invention according to claim 2 comprises an endless conveyor between a first press installed on the upstream side and a second press installed on the downstream side,
In addition, first and second transfer means having a work suction means are arranged in front and rear, and when the first and second press work 4 are loaded by the first and second transfer means, the work is inverted and loaded. In this case, the work is sucked to the upper side of the first transporting means which has been rotated forward, and the workpiece is transported to the second transporting means. When the work is transferred to the upper side of the second transfer means whose end has been lowered, the work is sucked to the upper side of the second transfer means which has been normally rotated, and the work 4 is carried into the second press, and the work is inverted. When carrying in without loading, the work is attracted to the upper side of the first transporting means which has been rotated forward to transport the work to the second transporting means, and the upstream end is raised to almost the same height as the first transporting means. When the work is transferred to the upper side of the Adsorbs workpiece upper side of the second conveying means is rolling into the second press is obtained so as to carry the workpiece.

According to the above-mentioned method, the workpiece can be selectively inverted, such as inverted or not, so that even when processing left and right parts such as automobile door parts, the rotation of the first and second transfer means is performed. Since it is possible to respond only by selecting the direction, the setup time can be significantly reduced, and the productivity can be improved accordingly.

In addition, since the work can be inverted while being conveyed, the work can be conveyed at a high speed and reversed at a high speed, thereby improving the operation rate of the press and the productivity associated therewith.

According to a third aspect of the present invention, there is provided a press line in which a first press is installed on an upstream side and a second press is installed on a downstream side, between the first and second presses. And a first conveying means comprising an endless conveyor rotatable in the normal and reverse directions, and a work adsorbing means provided so that the downstream end of the first conveying means is wrapped. In addition, the second transport means is constituted by an endless conveyor whose upstream end is vertically swingable.

According to the above configuration, it is possible to perform selective reversal, such as reversing or not reversing the work. Therefore, even when processing left and right parts such as car door parts, the rotation of the first and second transfer means is performed. Since it is possible to respond only by changing the direction, the setup time can be significantly reduced, and the productivity can be improved accordingly.

Since the work can be inverted while being transferred, the work can be transferred at a high speed and reversed at a high speed. As a result, the operation rate of the press can be improved and the productivity can be improved accordingly.

Further, the first press is provided between the first press and the second press.
-Since it is only necessary to install the second transport means, it can be easily installed even in a small space, and can be provided at a low cost because of its simple configuration.

In addition, since the work is conveyed while the work is being sucked by the work suction means, the position of the work does not shift during the conveyance, so that the work is carried into the second press without re-alignment. Therefore, a positioning device and a positioning step are not required.

According to a fourth aspect of the present invention, in order to achieve the above object, the work suction means of the first and second transfer means is constituted by an electromagnet.

According to the above configuration, the work can be reliably sucked and released, so that the position of the work does not shift during the transfer of the work.

In order to achieve the above object, the invention according to claim 5 comprises a work suction means of the first and second transfer means, a permanent magnet, and an electromagnet for reversely exciting the permanent magnet.

According to the above configuration, the work can be reliably attracted and released, so that the position of the work does not shift during the transfer of the work, and it is not necessary to constantly supply a current to the electromagnet, so that the power consumption can be reduced.

[0025]

Embodiments of the present invention will be described in detail with reference to the drawings. 1 is a plan view of a press line, FIG. 2 is a front view thereof, FIG. 3 is an enlarged view of a work reversing device, FIG. 4 is a perspective view of the same, FIG. 5 is an enlarged side view of a first conveying means, and FIG. 7 is a sectional view taken along the line AA of FIG. 7, FIG. 7 is a sectional view taken along the line BB of FIG. 4, and (a) and (b) of FIG.

[0026] 1 In these figures a press line, upstream of the workpiece transport direction C, the first press 1 ₁ consisting of blanking press for punching the workpiece 4 from the coil material, and on the downstream side, a plurality of processing A _second transfer press having stations W ₁ , W ₂ ...
Press 1 ₂ is installed, the main body 2 of the work turning device is installed between the first and second press 1 _1, 1 _2. Above the main body 2, the unloader 3 is being installed, so as to convey the workpiece 4 which is molded into the first press 1 ₁ from the main body 2 by the first press 1 _1.

[0027] The above unloader 3 have been laid so as to be parallel with the upright 1a of the first press, the crossbeam 3a which horizontally extends between the second press 1 ₂ uprights 1b guide rail 3b is a work transfer direction C , This guide rail 3b
The carriage 3c is reciprocally supported. From the bottom of the carriage 3c, the vacuum cup arm 3d is being projected obliquely into the first press 1 _one direction, for adsorbing to the tip of the arm 3d, the workpiece 4 that has been completed in forming the first press 1 ₁ work adsorption means 3e is provided as a work 4 adsorbed by the workpiece suction means 3e is, in accordance with the movement of the carriage 3c adapted to be carried into the first transport means 2 _first upper body 2 I have.

[0028] The body 2 is made of the first transport means 2 ₁ and the second transport means 2 ₂ consisting of an endless conveyor such as a chain conveyor. The first conveying means 2 ₁ upstream, and the second conveying unit 2 ₂ is disposed downstream, second conveying means in the first downstream end of the conveying means 2 ₁ of the upstream side and the downstream side 2
The upstream end of _{2 has} an end wrapped to transfer the work 4.

The first transport means 2 ₁ installed on the upstream side, as shown in FIG. 4, and an endless chain 2a of Article 2 spaced apart in the direction perpendicular to the work conveying direction C are provided, these chains 2a is wound around a sprocket 2b which is installed at a distance in the workpiece transfer direction C. Driving means (not shown) is connected to one of the sprockets 2b. The driving means enables the chains 2a to simultaneously rotate forward and backward in the same direction, and to the link 2c constituting each chain 2a. Is provided with, for example, a work suction means 5 composed of an electromagnet one by one.

Each of the work suction means 5 has a channel shape having an open upper surface. When a current is applied to the coil 5a, the work suction means 5 becomes an electromagnet and sucks the work 4 made of a magnetic material. work 4 second conveying means _{2 2}
In Upon reaching the upstream end, by blocking the current of the coil 5a, it is adapted to pass receiving the workpiece 4 to the second conveying unit 2 _2.

The second conveying unit 2 ₂ be composed from an endless conveyor such as a belt conveyor, having an endless belt 2f which is MekuSo the roller 2e disposed at a distance from each other in the work conveying direction C cage, the upstream end is located between the first conveying unit 2 ₁ chain 2a, while the be connected unillustrated drive source for the rollers 2e, endless belt 2f is reversely rotated by the drive source It has become.

Below the upper side of the endless belt 2f,
A work suction means 6 composed of an electromagnet is provided along the work transfer direction C so as to be close to the upper side lower surface, and the work 4 moved on the endless belt 2f is suctioned to the upper side. rotary shaft 2g for supporting the upstream end of the roller 2e or thereto for supporting frame (not shown) be connected lifter 7, the second conveying means 2 ₂
The upper end of the can swing up and down.

The lifter 7 is constituted by a hydraulic cylinder such as a hydraulic cylinder or an air cylinder.
The second upstream end upper surface of the conveying means 2 _2, first transport means 2 ₁ downstream end upper surface substantially the same height and substantially the same height as the first transport means 2 ₁ downstream end lower surface and the second conveying means 2 ₂ the top surface is adapted to the upstream end of the second conveying unit 2 ₂ is switched in three steps in a position higher than the first upper surface of the conveying means 2 _1.

[0034] The while the second press 1 within ₂ installed on the downstream side, the transfer feeder 8 is provided. The transfer feeder 8 has a pair of transfer bars 8a arranged side by side in the workpiece transfer direction C. These transfer bars 8a are two-dimensionally driven by driving means 8b and 8c installed on the upstream side and the downstream side. Alternatively, it is driven in a three-dimensional direction.

Each transfer bar 8a is provided with a plurality of work holding means (not shown) at intervals in the work transfer direction C, and holds the work 4 by these work holding means. is configured to sequentially conveyed 2 press 1 ₂ to each processing stays stations W _1, W 2 _....

Next, a method of inverting the work 4 by the above-configured work reversing device will be described. If you are loading the blanking first press consisting of a press 1 ₁ inverts the workpiece 4 that has been punched by the second press 1 ₂ made of transfer press in the reverses the first conveying means 2 ₁ of the body 2, the second conveying means 2 ₂ is rotated forward by the first transport means 2 ₁ the same speed.

Further first conveying unit _{2 1} from the second conveying means 2
₂ to transfer the work 4 to the second
The upper surface of the upstream end of the conveying means 2 _2, the lifter 7 until substantially the same height as the lower surface of the first transport means 2 ₁ the downstream end,
Lowering the second upstream end of the conveying means 2 _2. Then as to start operation of the press line 1 in this state, the first press 1 ₁ work 4 punched from the coil material by is carried out from the first press 1 within ₁ by unloader 3, first body 2 is placed on the conveying means 2 ₁ upper side, it is adsorbed by the workpiece suction means 5.

[0038] Since the first transport means _{2 1} is reversed,
A first conveying unit 2 ₁ of the lower side is conveyed as shown in (b) of FIG. 8, the second reaches the upstream end of the conveying means 2 _2, the workpiece attracting means 5 to release the workpiece 4 simultaneously, the second adsorbed on the workpiece attracting means 6 of the transporting means 2 _2, it is transferred from the first conveyor means 2 ₁ to the second conveyance means 2 _2. Since the second conveying means 2 ₂ are forward, the workpiece 4 that has been transferred to the second conveying unit 2 ₂ the second upper side of the conveying means 2 ₂ is conveyed, the second press 1 ₂ Work Reach the loading position. When the workpiece attracting means 6 to release the workpiece 4, transfer bars 8a being operated in synchronization with the second press 1 ₂ Operation
Of being retained by the workpiece holding means, each processing stays stations W _1, W 2 _... sequentially conveyed to the molding of the workpiece 4 is carried out by the processing stays stations W _1, W 2 _....

[0039] Although is operation for carrying the second press 1 ₂ by inverting the workpiece 4 punched by the first press 1 _1, when carried without inversion is the next operation.
In the case where the work 4 is not turned over, as shown in FIG.
It rotated forward by the second conveying means ₂ 1, _{2 2} both the same speed, the second
Raising the second conveying means 2 ₂ at the upstream end by the lifter 7 so that the upstream end upper surface of the conveying means 2 ₂ at substantially the same height as the first downstream end upper surface of the conveying means 2 _1.

[0040] Next, when starting the operation of the press line 1 in this state, it is punched by the first press 1 _1, unloader 3
Work 4 carried into the first transport means 2 ₁ of the body 2 by
As is shown in (b) of FIG. 8, it is transported to the first upper side of the conveying means 2 ₁ reaches the second conveying means 2 _2, first transport means 2 ₁ than the second upper side of the conveying means 2 ₂ Will be transferred to Note the time the second upstream end upper surface of the conveying means 2 _2, so as to be higher than the first downstream end upper surface of the conveying means 2 _1, by swinging the second upstream end of the conveying means 2 ₂ vertically each time ,
Passing of the workpiece from the first conveying unit 2 ₁ to the second conveyance means 2 ₂ so can be reliably performed. This was carried into the second press 1 ₂ without inverting the workpiece 4 punched by the first press 1 _1, the second press 1 each working stays stations W ₁ of _2, W 2 _... it can be molded by .

It should be noted in the above embodiment, the case for carrying and inverting the workpiece 4 to the second press 1 _2, the first conveying means 2 ₁
Is reversed, the second conveying unit 2 ₂ is allowed to forward subjected to reversal of the workpiece 4, but the workpiece 4 the first and second transport means 2 _1, 2 ₂ is rotated forward as shown in FIG. 9 May be reversed.

[0042] That is rotated forward the first conveying unit 2 ₁ a workpiece 4 is adsorbed on the first upper side of the conveying means 2 _1, the workpiece 4 is to bypass the downstream end of the first transport means 2 ₁ to the lower side Once wrap around, and release the workpiece 4, is dropped to the second conveyance means 2 a _second upper side to wait below the first conveying means 2 _1, the workpiece 4 is adsorbed on the second upper side of the conveying means 2 ₂ in state by forward second conveying means 2 ₂ intended to carry into the second press 1 _2, in this case, when the workpiece 4 that has reached the first conveying means 2 ₁ of the lower end goes around the lower side, the work 4 to the extent that does not interfere with the second conveying means 2 _2, it is sufficient to provide a gap between the first conveying unit 2 ₁ of the downstream end and the second conveying unit 2 ₂ at the upstream end.

[0043] Also the above in the embodiment, both the first and second transport means ₂ 1, _{2 2} workpiece attracting means 5 provided,
Although the work 6 is constituted by an electromagnet, if the work 4 is a magnetic material, a permanent magnet or vacuum suction means may be used in addition to the electromagnet. If the work 4 is a non-magnetic material, vacuum suction may be used. Can be. For permanent magnets, can not release the workpiece 4 when transferred from the first transport means 2 ₁ to the second conveyance means 2 _2, first and second transport means 2 _1, 2
_When the work 4 reaches the downstream side by installing an electromagnet on the downstream side of _2, the permanent magnet is reversely excited by the electromagnet to release the work 4 from the permanent magnet and drop the work 4 by its own weight. .

[0044] Furthermore, when transferring from the first transport means 2 ₁ to the second conveyance means 2 ₂ without inverting the workpiece 4 while applying a reverse excitation by an electromagnet, the second upper surface of the conveying means 2 ₂ first and higher than the upper surface of the conveying means 2 _1, the first conveying means 2 ₁
The work 4 may be released from the permanent magnet.

[Brief description of the drawings]

FIG. 1 is a plan view of a press line provided with a work reversing device according to an embodiment of the present invention.

FIG. 2 is a front view of a press line provided with a work reversing device according to an embodiment of the present invention.

FIG. 3 is an enlarged view of a work reversing device according to an embodiment of the present invention.

FIG. 4 is a perspective view of a work reversing device according to an embodiment of the present invention.

FIG. 5 is an enlarged side view of a first transporting means constituting the work reversing device according to the embodiment of the present invention.

FIG. 6 is a sectional view taken along line AA of FIG.

FIG. 7 is a sectional view taken along the line BB of FIG. 4;

FIGS. 8A and 8B are explanatory diagrams of the operation of the work reversing device according to the embodiment of the present invention.

FIG. 9 is an operation explanatory view of a work reversing device according to another embodiment of the present invention.

[Explanation of symbols]

1 ₁ 1st press 1 ₂ 2nd press 2 ₁ 1st conveyance means 2 ₂ 2nd conveyance means 4 ... work 5, 6 ... work adsorption means

Claims (5)

[Claims] And 1. A first press 1 ₁ installed on the upstream side,
During the second press 1 ₂ provided on the downstream side and from the endless conveyor, and a having a workpiece attracting means 5,6 1
- second conveying means ₂ 1, _{2 2} are arranged before and after these first
- by the second conveying means 2 _1, 2 ₂ per than the first press 1 ₁ to the second press 1 ₂ to carry the workpiece 4, when carried by inverting the workpiece 4, the first conveying means reversed 2 ₁
When the transported work 4 to the second conveying means 2 ₂ adsorbed on the lower side, and the work 4 to transfer the upstream end to the second conveyance means 2 a _second upper side is lowered, a second that is rotated forward Conveying means 2
To ₂ of upper side to adsorb the workpiece 4 to the second press 1 ₂ while carrying the workpiece 4, when carried without inverting the workpiece 4, the first conveying means 2 ₁ of the upper side that is rotated forward conveying the workpiece 4 the workpiece 4 to the second conveying means 2 ₂ adsorbed and workpiece 4 to the upstream end to the first conveying means 2 ₁ and the second conveyance means 2 a _second upper side almost raised to the same height After transferring a workpiece 4 to the second upper side of the conveying means 2 ₂ is rotated forward
Work turning method characterized by loading the workpiece 4 to the second press 1 ₂ adsorbs. And wherein the first press 1 ₁ installed on the upstream side,
During the second press 1 ₂ provided on the downstream side and from the endless conveyor, and a having a workpiece attracting means 5,6 1
- second conveying means ₂ 1, _{2 2} are arranged before and after these first
- by the second conveying means 2 _1, 2 ₂ per than the first press 1 ₁ to the second press 1 ₂ to carry the workpiece 4, when carried by inverting the workpiece 4, the first conveying means is rotated forward 2 ₁
Of the upper side adsorbs the workpiece 4, to the second conveying means 2 ₂ conveys the workpiece 4, where they work 4 is wrapped around the lower side of the first downstream end of the conveying means 2 _1, lowering the upstream end It was After placing the workpiece 4 to the second conveyance means 2 a _second upper side,
To the second conveyance means 2 a _second upper side which is forward adsorbs the workpiece 4 to the second press 1 ₂ while carrying the workpiece 4, when carried without inverting the workpiece 4, the was forward to first conveying unit 2 _first upper side to adsorb the workpiece 4 to convey the workpiece 4 to the second conveying means 2 _2, and a second conveyance raising the upstream end at substantially the same height as the first transport means 2 ₁ After placing the workpiece 4 to unit 2 ₂ the upper side, characterized in that loading the workpiece 4 by suction the work 4 to the second upper side of the conveying means 2 ₂ is rotated forward to the second press 1 ₂ Work reversal method. Wherein the first press on the upstream side 1 _1, and in a press line in which the second press 1 ₂ is installed on the downstream side, is installed between the first and second press 1 _1, 1 _2,
And which has a workpiece attracting means 5, the first transport means 2 ₁ of a positive reverse rotatable endless conveyors, the first
The downstream end of the conveying means 2 ₁ is installed so as to wrap, and which has a workpiece attracting means 6, and characterized in that the upstream ends and a second conveyor means 2 ₂ made vertically swingable endless conveyor Work reversing device. Wherein the first and second transport means ₂ 1, _{2 2} of the workpiece suction means 5,6, claim 3 comprising constituted by an electromagnet
The work reversing device as described. 5. The first and second transport means 2 _1, 2 ₂ of the workpiece suction means 5, 6, and the permanent magnet, formed by more configuration and electromagnet for inverse excitation permanent magnet according to claim 4, wherein the work turning apparatus.