JPH08252639A - Work reversing device - Google Patents

Abstract

PURPOSE: To continuously execute pallet transfer work and work reversing work by arranging a pallet transfer mechanism in a rotary drum. CONSTITUTION: In a rotary drum 1 rotating around a horizontal axis 15, a first transport device 11 for position fixing and a second transport device 12 driven by a cylinder 13 are placed in the direction coinciding with the same direction as a horizontal axis 15, pallet fixing devices 20, 21, by which a pallet P is disengaged and fixed to the transport devices 11, 12, are incorporated into each pallet transport device 11, 12. After the pallet P is fixed to the first/ second transport devices 11, 12 by the pallet fixing devices 20, 21, a work W together with the pallet P is held with both transport devices 11, 12 and then reversed with rotation of the rotary drum 1, after reversing, an upper side pallet P is separated from the upper face of work W and is made wait at upside and then is supplied to the upper face of the work W carried in next.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work reversing device for reversing a work stacked on a pallet together with the pallet.

[0002]

2. Description of the Related Art For example, in a press working line for a side member of an automobile body, generally, a work of the same shape is cut (blanking) from a coil material, and then either the work for the right side member or the work for the left side member is performed. One of them is inverted by an inversion device and sent to the press machine. Conventionally, as the reversing device, one in which a work clamping means is disposed in a rotary drum which is rotationally driven around a predetermined axis is generally used, and a work stacked on a pallet is clamped by the work clamping means together with the pallet. By rotating the rotary drum,
The work of 50 to 200 sheets was turned over.

By the way, in the above-mentioned reversal of the work, the work must be placed on the pallet and conveyed to the pressing process even after the reversal as in the case before the reversal. Therefore, the work is pinched in the reversing device. It is necessary to place the pallet on the laminated work in advance. Also,
In order to prevent the work from being scratched by the pallet during transportation, it is necessary to remove the pallet from the stacked work after reversing. However, in the past, the loading and unloading work of these pallets has generally been carried out using a forklift, which requires a lot of time and sacrifices productivity. There was a problem such as scratches on the surface, or dust on the work from the pallet, which deteriorates the appearance quality of the subsequent pressed product.

Therefore, for example, in the apparatus described in Japanese Utility Model Laid-Open No. 4-105017, a pallet transfer device is provided adjacent to the reversing device, and the pallet transfer device stacks the work before and after the work is loaded into the reversing device. The work of placing the pallet on the work and removing the pallet from the stacked work is carried out. According to this, various problems associated with the use of the forklift can be solved.

[0005]

However, according to the apparatus described in the above publication, since the pallet transfer apparatus has to be installed independently of the reversing apparatus, the entire apparatus becomes large and the installation space is enlarged. There is an unavoidable problem, and in addition, there is a problem that it takes time from the pallet transfer work to the reversing work, and the productivity cannot be increased as expected.

The present invention has been made in view of the above-mentioned problems of the prior art. An object of the present invention is to provide a pallet transfer mechanism in a rotary drum to continuously perform pallet transfer work and work reversal work. Therefore, it is possible to reduce the installation space and improve the productivity.

[0007]

In order to solve the above-mentioned problems, a work reversing device according to the present invention has a work clamping means disposed in a rotary drum which is driven to rotate about a predetermined axis. In a work reversing device for holding a work by a holding means via upper and lower pallets and reversing the work by rotation of the rotating drum, the holding means engages and disengages the upper and lower pallets to hold each pallet. The pallet fixing means for fixing to the means is additionally provided.

In the present invention, the work holding means is
It can be composed of two conveying devices arranged so that the mutual distance can be varied. In this case, it is preferable that the pallet fixing means includes guide means extending in the carrying direction of the carrying device and engageable with a groove provided on the back surface of the pallet.

[0009]

In the work reversing device configured as described above, the upper and lower pallets are fixed to the work holding means by the pallet fixing means before the work is turned over, so that the work holding means after the work is turned over is released. By the clamping operation, the pallet is separated from the upper surface of the work and is in an upper standby state, and the pallet can be quickly supplied onto the work that is loaded on the pallet because it is inverted.

Further, when the work holding means is composed of two transporting devices having variable mutual distances, not only the work can be automatically carried in and out of the rotary drum, but also the work can be carried in and out promptly. It can be performed stably. Further, when the pallet fixing means is provided with a guide means that extends in the carrying direction of the carrying means and is engageable with the groove provided on the back surface of the pallet, positioning of the pallet at the time of loading the work is easy. become.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 and 2 show the entire structure of a work reversing device according to the present invention. In both figures,
Reference numeral 1 denotes a rotary drum, which is composed of a pair of front and rear ring-shaped main body frames 2 and 2, a plurality of connecting frames 3 for connecting the main body frames 2 and 2, and a reinforcing frame 4 that bridges each main body frame 2 vertically and horizontally. . The rotating drum 1 includes a plurality of (four in front and back, left and right) support rollers 7 rotatably attached to a support plate 6 installed on a base 5, and a body frame 2 thereof.
By mounting, it is possible to rotate about a predetermined shaft 15 extending in the horizontal direction or a direction close to this. A power transmission member 8 such as a chain is wound around one of the front and rear body frames 2, and the power transmission member 8 is driven by a motor (not shown) installed on the base 5 to drive wheels 9 and a slave. By transmitting power via the driving wheel 10, the rotary drum 1 rotates left or right.

In the rotary drum 1, two transfer devices as work clamping means, that is, a first transfer device 11 whose installation position is fixed and a movable second transfer device 12 are parallel to each other. In addition, it is arranged so that the conveying direction coincides with the direction of the shaft 15. First transport device 11
Is fixedly mounted on the reinforcing frame 4 of the rotating drum 1, while the second conveying device 12 is provided with a plurality of (four in front and rear, left and right) lifting cylinders 13 suspended from the main body frame 2 of the rotating drum 1. It is mounted and fixed on the lift table 14 attached to the rod end of the. That is, the second transfer device 12 is moved toward and away from the first transfer device 11 when the lift table 14 is lowered or raised by the operation of the cylinder 13.

First carrier device 11 and second carrier device 12
Means that at the shortened end of the lifting cylinder 13, the respective transport surfaces are equidistantly spaced from the shaft 15, and therefore the rotation of the rotary drum 1 causes the second transport device 12 to move downward. By moving the first transfer device 11 to the first transfer device 12 and shortening the lifting cylinder 13, the transfer surface of the second transfer device 12 is positioned at the same height level as the transfer surface of the first transfer device 11. Further, when the lifting cylinder 13 is shortened, the maximum distance between the two transfer devices 11 and 12 is further predetermined to a value obtained by adding the thickness of two stacked pallets P to the stacking height of the works W to be reversed. The size is set to allow for the margin.

On one side of the rotary drum 1, a transfer device 16 for transferring the pallet P on which the works W are stacked between the blanking process and the rotary drum 1 is installed.
The transfer surface of the transfer device 16 is set at the same height level as the transfer surface of the first transfer device 11 positioned on the lower side, which allows the transfer device 16 to move from the blanking process.
The pallet P on which the works W are stacked and transported by
Can be transferred onto the second transport device 12 positioned on the lower side by the rotation of the first transport device 11 positioned on the lower side or the rotary drum 1 and the shortening of the lifting cylinder 13. become.

Here, the first and second transfer devices 11 and 12
As shown in FIG. 3, each of them comprises a three-piece chain conveyor 17 and a series of receiving rollers 18, and two of them are on the left side of the transport center C, and one of them is a chain conveyor. The receiving roller 17 and the receiving roller 18 are arranged on the right side of the conveyance center C, respectively. In this way, the three-piece chain conveyor 17 and the series of receiving rollers 1
8 and 8 are provided for a plurality of types of works W having different sizes.
This is for the purpose of carrying a small work Wa as shown in FIG. 3 by using the two-piece chain conveyor 17 near the carrying center C, and
Three-piece chain conveyor 1 for large workpieces Wb
By using 7 and a series of receiving rollers 18, the conveyance can be performed. The receiving roller 18 is simply the work W.
Although it has only the function of receiving the (pallet P), the reason why the receiving roller 18 is used is that if this is a chain conveyor, the movement of a stopper member 19 (which will be described later) that restricts the work W from slipping off is improper. Because it will be possible
The receiving rollers 18 are arranged with a gap 18a that allows the stopper member 19 to move.

Each of the first and second transfer devices 11 and 12 is provided with a pallet fixing device 20 or 21 for engaging and disengaging the pallet P and fixing the pallet P onto the transfer device 11 or 12. Has been done. Each pallet fixing device 2
0 and 21 are extended in parallel with the axis 15 along the transport center C, as shown in detail in FIGS.
A guide bar (guide means) 23 engageable with a V-shaped groove 22 formed on the back surface of the pallet and a T-shaped groove 24 formed on the back surface of the pallet P so as to be movable up and down. A pair of clamp cylinders 26 provided with engageable clamp claws 25 at the rod tip, a tilting cylinder 27 for raising and lowering each of the clamp cylinders 26, and a position detecting hole 28 formed in the pallet P are detected. And a sensor (proximity switch) 29. A guide groove 24a that facilitates the movement of the clamp claw 25 into the T-shaped groove 24 is formed on the back surface of the pallet P.

The pallet fixing device 20 on the side of the first transfer device 11 is arranged on a support frame 30 bridged between the reinforcing frames 4 of the main body frame 2 constituting the rotary drum 1, while the second transfer device 11 is provided. Side pallet fixing device 2
1 is arranged on the lifting table 14. Further, each guide bar 23 is supported by columns 31 extending from the support frame 30 and the elevating table 14, and is also supported by a reinforcing member 32 arranged in a mountain shape. The reinforcing member 32 on the side of the first transport device 11 is mounted on a supporting plate 34 (FIG. 5) bridged between a pair of auxiliary frames 33 supported by the reinforcing frame 4 and extending parallel to the shaft 15. It is arranged.

In such pallet fixing devices 20 and 21, the guide bar 23 has the first and second conveying devices 1.
By engaging with the V-shaped groove 22 of the pallet P on the first and the second pallets 12, the movement of the pallet P in the lateral direction (direction orthogonal to the transport direction) is restricted. Further, when the pallet P is positioned at a predetermined position on each of the transfer devices 11 and 12, the clamp cylinder 26 is erected by the operation of the tilting cylinder 27, so that the clamp claw 25 at the tip of the pallet P moves.
The locking member 25 pulls down the pallet P and the pallet P is positioned with respect to each of the transport devices 11 and 12 by entering the T-shaped groove 24 of FIG. Fixed.

A pair of support frames 35 are bridged in the vicinity of the center of the connecting frame 3 located on the side of the first transfer device 11 as shown in FIG.
The stopper member 19 (hereinafter, referred to as a first stopper member) is slidably attached to one side of the member 5. Each first stopper member 19 is attached to each support frame 35.
2 is operatively connected to a traverse cylinder 36 (FIG. 2) fixed to the side surface of the supporting frame 35.
It is designed to cross along. The first stopper member 19 plays a role of preventing the work W from slipping off by coming into contact with the side end of the work W which is the lower side at the time of reversing. It moves horizontally between the solid line position and the dotted line position shown in FIG. The solid line position abuts the side end of the large work Wb, and the dotted line position abuts the side end of the small work Wa. When the first stopper member 19 moves between the position indicated by the solid line and the position indicated by the dotted line, the gap 1 between the series of receiving rollers 18 constituting the conveying devices 11 and 12 as described above.
8a will be passed.

On the other hand, the reinforcing member 3 of the pallet fixing device 20.
A second stopper member 37 is provided on each of both ends of the pair of auxiliary frames 33 that support the two. As shown in detail in FIGS. 8 to 10, the second stopper member 37 is slidably fitted to a guide cylinder 39 slidably attached to a slide rail 38 provided at a side end of each auxiliary frame 33. Has been inserted. In addition, the second stopper member 3
The position of 7 is fixed by a locking member 41 extending from a locking cylinder 40 fixed to the side surface of the auxiliary frame 33 and laterally inserted into the guide cylinder 39. The guide cylinders 39 located at both ends of the auxiliary frame 33 are operatively connected to traveling cylinders 42 fixed on both upper and lower surfaces of the auxiliary frame 33.
The pair of front and rear second stopper members 37 serve as the guide tube 3
9 and 9, the cylinders 42 are synchronously operated to move horizontally relative to each other. This second stopper member 37
Is for contacting the front and rear ends of the work W on the first and second transfer devices 11 and 12 to prevent the work W from being displaced, and the solid line positions shown in FIGS. And the dotted line position. The solid line position abuts on the front and rear ends of the large work Wb, and the dotted line position abuts on the front and rear ends of the small work Wa.

The second stopper member 37 is arranged in the carrying direction of the first and second carrying devices 11, 12.
Therefore, when the work W (pallet P) is carried in and out of the transfer device 16 from the transfer device 16, the second stopper member 37 needs to be retracted from the transfer surfaces of the transfer devices 11 and 12. In view of this, in this embodiment, a stopper raising / lowering device 43 is provided below the position-fixed first conveying device 11, and the stopper raising / lowering device 43 causes the second raising / lowering device 43 to move as needed.
The stopper member 37 is pulled down from the transport surface of the first transport device 11.

FIGS. 11 and 12 show details of the stopper raising / lowering device 43. The rail 45 is attached to a support frame 44 which is bridged between the main body frame 2 of the rotary drum 1 and the reinforcing frame 4, and the rail 45. A sliding member 47 slidably mounted on the rail 45 and having an engaging portion 46 at the upper end that can be engaged with and disengaged from the lower end of the second stopper member 37, and a tip of a rod 48a supported by the main body frame 2 slides on the sliding member 47. The cylinder 48 is connected to the moving member 47. The engaging portion 46 of the sliding member 47 is formed with a T-shaped groove 46a into which the T-shaped engaging piece 37a (FIG. 8) provided at the lower end of the second stopper member 37 can be inserted. T-shaped groove 46a
The sliding member 47 and the second stopper member 37 are connected to each other by inserting the engaging piece 37a into the sliding member 47. Therefore, if the rod 48a of the cylinder 48 is shortened in this connected state, the second stopper member 3 is integrated with the sliding member 47.
7 descends and sinks from the transport surface of the first transport device 11.

Here, the engaging portion 46 of the sliding member 47 is
Is arranged so that the T-shaped groove 46a is directed in the horizontal movement direction of the second stopper member 37, and at the extension end of the rod 48a of the cylinder 48, the T-shaped groove 46a is formed.
Is positioned at the same height level as the T-shaped engaging piece 37a at the lower end of the second stopper member 37 fixed to the rising end by the locking cylinder 41. Therefore, if the second stopper member 37 is lifted with the rod 48a of the cylinder 48 as the extension end and the second stopper member 37 is fixed at that position by the operation of the lock cylinder 41, the traveling cylinder 42 (FIG. 12). ), The engaging piece 37 at the lower end of the second stopper member 37
a is automatically disengaged from the T-shaped groove 46a of the sliding member 47,
The horizontal movement of the second stopper member 37 is free. Of course, by the reverse operation, the engaging piece 37a is automatically inserted into the T-shaped groove 46a, and the second stopper member 37 and the sliding member 47 are rejoined.

The operation of the above embodiment will be described below. Before starting the reversing work, only the pallet P is placed on the transfer device 16 in advance, and the pallet P is transferred from the rotary drum 1 by the cooperation of the transfer device 16 and the first transfer device 11 in the rotary drum 1. Stop at a predetermined position (reverse position). At this time, the guide bar 23 of the pallet fixing device 20 engages with the V-shaped groove 22 of the pallet P, and the pallet P is positioned in the left-right direction orthogonal to the transport direction. The pallet P is stopped by the sensor 29 detecting the positioning hole 28 on the back surface of the pallet P. When the pallet P stops, the tilting cylinder 27 of the pallet fixing device 20 operates toward the shortening side, the clamping cylinder 26 stands up, the clamp claw 25 at the rod end thereof enters the T-shaped groove 24 of the pallet P, and The clamping cylinder 26 operates toward the shortening side, and the pallet P is fixed on the chain conveyor 17 or the receiving roller 18 of the first transport device 11.

Next, the rotary drum 1 is rotated clockwise by the operation of a motor (not shown). During this rotation, since the guide bar 23 of the pallet fixing device 20 is engaged with the V-shaped groove 22 of the pallet P, the pallet P does not fall off. The rotary drum 1 is stopped by rotating 180 degrees, whereby the first transport device 11 is positioned on the upper side and the second transport device 12 is positioned on the lower side.
The second transfer device 12 is previously positioned at the rising end (FIGS. 1 and 2) by the shortening operation of the lifting cylinder 13, and the transfer surface of the second transfer device 12 is in the state of being moved to the lower side.
It will be at the same level as the transfer surface.

After that, the pallet P in which a large number of works W are stacked is transferred from the blanking process by the transfer device 16 and carried in the above-mentioned inversion position in the rotary drum 1 in cooperation with the second transfer device 12. . At this time, the pallet P is positioned by the guide bar 23 of the pallet fixing device 21 in the left-right direction orthogonal to the transport direction, and the stop position of the pallet P is controlled by the signal from the sensor 29, as described above. . At this time, the transfer device 1
The second stopper member 37 on the sixth side is lowered outside the interference with the pallet P by the operation of the stopper cylinder 48. Then, at the same time when the pallet P stops,
By the operation of the tilting cylinder 27 and the clamping cylinder 26 of the pallet fixing device 21, the pallet P on which the works W are stacked is fixed on the chain conveyor 17 or the receiving roller 18 of the second transfer device 12.

Next, the elevating cylinder 13 extends, the second carrier 12 moves up together with the elevating table 14, and the upper surface of the laminated work W is pressed against the pallet P waiting on the upper side.
The work W is sandwiched between the first transfer device 11 and the second transfer device 12 via two pallets P. continue,
By the operation of the traverse cylinder 36, the first stopper member 1
9 moves to the work W side and contacts the side end of the stacked work W, and at the same time, the rod 4 of the stopper cylinder 48
8a extends, the second stopper member 37 rises and largely projects to the side of the work W, and then each traveling cylinder 4
By the operation of 2, the front and rear second stopper members 37 move to the work W side and contact the front and rear ends of the stacked work W.

Next, the rotary drum 1 rotates (reverses) in the counterclockwise direction shown in FIG. 1 and stops at 180 degrees. As a result, the first transfer device 11 moves downward and the second transfer device 1 moves downward.
2 are respectively positioned on the upper side, and the work W is inverted. At this time, the displacement of the work W is prevented by the holding force of the first and second transfer devices 11 and 12 and the movement restriction of the work W by the first and second stopper members 19 and 37.
The work W is stably inverted. Simultaneously with the completion of the reversal of the work, the first and second stopper members 19 and 37 are retracted to their original positions by the operation of the corresponding cylinders 36 and 42, and the second stopper member 37 on the transfer device 16 side is stopped. The operation of the working cylinder 48 lowers the interference with the pallet P. Next, the elevating cylinder 13 operates toward the shortening side, and the second transfer device 12 and the pallet fixing device 21 on the upper side are moved.
And the pallets P move upward (the unclamping operation is performed), and the upper pallet P separates from the upper surface of the stacked work W. On the other hand, the clamping cylinder 26 and the tilting cylinder 27 of the lower pallet fixing device 20 are sequentially operated, the clamp claw 25 is disengaged from the engaging groove 24 of the pallet P, and the pallet P is released from the fixation. Then, the work W is driven by driving the first transfer device 11.
The pallet P on which is placed is transferred onto the transfer device 16 and is transferred by the transfer device 16 to the delivery place for the pressing process.

However, since the pallet P to be placed on the next work W is suspended and held by the pallet fixing device 21 on the upper side in the rotary drum 1, after that, the pallet P in which the works W are stacked is placed. The next work W can be reversed by carrying in the rotary drum 1 from the transfer device 16 and repeating the above operation. Particularly in this embodiment, since the conveying devices 11 and 12 are arranged in the direction of the shaft 15 which is the rotating shaft of the rotating drum 1, even if the work W sticks out from the side surface of the rotating drum 1, the work W can be inverted and can be a target. The types of workpieces expand. Moreover, since a thin rotating drum 1 can be used, the installation space can be reduced as much as possible. Further, in this embodiment, one of the two transporting devices 11 and 12 is fixed in position and only the other transporting device 12 is movable, so that only the movable transporting device 12 is position-controlled. Good, the control mechanism is simple.

The transfer devices 11 and 12 may be arranged in the diametrical direction of the rotary drum 1 so that the work can be carried in and out of the rotary drum from the side. In this case, the guide bar 23 in the pallet fixing device 20, 21 is supported by the elevating means so as to be raised after the pallet is loaded. Further, the guide bar 23 as a guide means for engaging with and positioning the groove 22 on the back surface of the pallet P can be replaced by a conveying device such as the chain conveyor 17, but the present invention is the guide means. The (guide bar 23) may be omitted. Furthermore, it goes without saying that both the transport devices 11 and 12 may be movable.

[0032]

As described in detail above, according to the work reversing device of the present invention, the pallet fixing device for removably fixing the pallet to the work holding means provided in the rotary drum is provided. Therefore, the pallet transfer work and the reversal work can be continuously performed in the rotary drum without separately providing a pallet transfer device, and the installation space can be reduced and the productivity can be improved. In addition, when the work holding means is formed of two transfer devices having variable mutual distances,
Not only the work can be automatically carried in and out of the rotary drum, but also the work can be carried in and out quickly and stably, and the utility value is improved. Further, when the pallet fixing means is provided with a guide means that extends in the carrying direction of the carrying means and is engageable with the groove provided on the back surface of the pallet, positioning of the pallet at the time of loading the work is easy. Therefore, the reliability of the device is further improved.

[Brief description of drawings]

FIG. 1 is a front view showing the overall structure of a work reversing device according to the present invention.

FIG. 2 is a side view showing the overall structure of the work reversing device.

FIG. 3 is a schematic diagram showing an arrangement relationship between a transport device and a stopper member in the present work reversing device.

FIG. 4 is a side view showing the structure of a pallet fixing device that constitutes the present work reversing device.

FIG. 5 is a front view showing the structure of a pallet fixing device that constitutes the present work reversing device.

FIG. 6 is a plan view showing the structure of a pallet.

FIG. 7 is a front view showing the structure of a pallet.

FIG. 8 is a side view showing a stopper member and its mounting structure constituting the present work reversing device.

FIG. 9 is a plan view showing the stopper member and its mounting structure.

FIG. 10 is a front view showing the stopper member and its mounting structure.

FIG. 11 is a front view showing a lifting mechanism for the present stopper member.

FIG. 12 is a side view showing a lifting mechanism for the present stopper member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotary drum 7 support roller 11 1st conveyance apparatus (work holding means) 12 2nd conveyance apparatus (work holding means) 13 lifting cylinder 15 shaft 16 transfer device 17 chain conveyor 19 first stopper member 20 pallet fixing device 21 Pallet fixing device 22 Pallet groove 23 Guide bar (guide means) 26 Clamping cylinder C Transfer center P Pallet W Work

Claims (3)

[Claims] 1. A work clamping means is disposed in a rotary drum which is rotationally driven around a predetermined axis, and the work clamping means is configured to clamp a work through an upper pallet and a lower pallet so that the rotary drum rotates. A work reversing device for reversing a work, wherein the work clamping means is provided with pallet fixing means for engaging and disengaging the upper and lower pallets and fixing each pallet to the work clamping means. . 2. The work reversing device according to claim 1, wherein the work gripping means is composed of two transfer devices arranged so as to be variable in mutual distance. 3. The pallet fixing means is provided with guide means extending in the carrying direction of the carrying device and engageable with a groove provided on the back surface of the pallet. Work reversing device.