JPH0530047Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a device for stacking and piling a large number of various sheet materials (cut plates) such as aluminum plates and steel plates.

Conventional technology Sheet materials such as aluminum plates manufactured through a predetermined process are stacked on pallets and then packed and packed.
Generally, it is handled by shipping or temporarily storing it in a warehouse, and piling equipment for this purpose has conventionally been vacuum suction type equipment such as vacuum pads, air piling equipment, or so-called foldable guide roller type equipment. It has been known.

That is, FIG. 3 is a schematic diagram of a vacuum adsorption type piling device using a vacuum pad, in which a vacuum pad 3 is applied to a sheet material 2 that is sent to its terminal end by a conveyance table 1 such as a roller table. While pressing, vacuum suction is applied, and the thus-adsorbed sheet material 2 is lifted from the conveyance table 1 and carried above the pallet 4 placed in front of it, where the adsorption is released and the sheet material 2 is allowed to fall or is adsorbed. The sheet material 2 is stacked on the pallet 4 by releasing the suction after descending while holding the sheet material 2.

FIG. 4 is a schematic diagram of a conventional air piling device, in which the sheet material 2 that has been carried to the end of the conveying table 1 is floated up from the conveying table 1 by high pressure air 5 supplied to the lower side of the sheet material 2. At the same time, the pallets are moved to above the pallet 4 in front of the pallet 4, and then dropped onto the pallet 4 and stacked.

Further, FIGS. 5A and 5B are schematic diagrams showing a conventional so-called collapsible guide roller type piling device,
The sheet material 2 carried to its terminal end by the conveying table 1 is once placed on the retractable guide rollers 6 arranged on both sides of its lower surface, and then the guide rollers 6 are rotated in the direction of the arrow in FIG. 5A. Accordingly, the sheet material 2 is removed from the lower surface of the sheet material 2, and the sheet material 2 is dropped onto a pallet 4 and stacked.

By the way, in Utility Model Publication No. 53-20378, there is
A piling device as schematically shown in the figure has been proposed. That is, in the apparatus shown in FIG. 6, the sheet material 2 fed by the conveyor 30 is
It slides on the tilting table 31 along the tilting direction and is stopped in the tilted state by a receiver 32 provided in front of the tilting table 31, and while the tilting table 31 maintains its tilted state, the air cylinder 33 so that the sheet material 2 is dropped onto the pallet 4. Note that the receiver 32 is rotatable so as to be able to release the engagement with the leading end of the sheet material 2.

Furthermore, the sheet material piling process of the apparatus shown in FIG. 6 is exploded and shown in FIGS. 7A to 7D.

As already mentioned, the sheet material 2 that has slid down on the tilting table 31 stops when its tip abuts against the receiver 32 (FIG. 7A), and then the tilting table 31 slides down as shown in FIG. 7B. If the tip of the tilting table 31 comes off the rear end of the sheet material 2 while maintaining the tilted state as shown in FIG. Then, as shown in FIG. 7D, the rear end side of the sheet material 2 falls downward, and then, as shown in FIG.
The tip side of the is dropped.

On the other hand, Japanese Utility Model Publication No. 56-27163 proposes a piling device as schematically shown in FIG.
In the apparatus shown in FIG. 8, the sheet material 2 fed by the conveyor 30 slides on the loading platform 35 maintained in an inclined state along the inclination direction, and is placed in front of the loading platform 35. flat stopper 3
6, the loading platform 35 is then returned to a horizontal state by a guide device (not shown) and is moved backward by the air cylinder 33, so that the sheet material 2 is dropped onto the pallet 4. . Note that 37 is a scraper for preventing the sheet material 2 from retreating when the loading platform 35 is retreating.

Furthermore, the sheet material piling process of the apparatus shown in FIG. 8 is exploded and shown in FIGS. 9A to 9D.

As described above, the sheet material 2 that has slid down on the inclined loading platform 35 is stopped by contacting the stopper 36 with its leading end (FIG. 9A), and then the loading platform 35 is moved to the first position. As shown in Figure 9B, it retreats while becoming horizontal. At this time, the rear end of the sheet material 2 is prevented from retreating by the scraper 37. When the center of gravity of the sheet material 2 deviates from the tip of the loading table 35, the sheet material 2 falls from the tip side as shown in FIG. If it comes off, the rear end side of the sheet material 2 will fall down.

On the other hand, Utility Application No. 56-17249 (Utility Application No. 54-99157)
) and Utility Model Application No. 120544 (Sho 56-6880)
In this system, an inclined conveyor driven by a motor or the like is used as a device (automatic plate receiving machine) for stacking hard plate-shaped objects such as printed wiring boards, and the distance between the axes of the inclined conveyor is A device has also been proposed in which the tip position of an inclined conveyor is moved forward or backward by expanding and contracting the conveyor.

Problems to be solved by the invention Among the conventional devices mentioned above, vacuum suction type devices such as the piling device using a vacuum pad shown in Fig. 3, similar vacuum feeders and vacuum conveyors, etc. In addition to a vacuum pump that generates a high vacuum sufficient to pull up the sheet material 2, a mechanism to attract and move the sheet material 2, and a control device to accurately adsorb and release the sheet material 2 are required. As a result, the overall structure becomes complicated and large, resulting in high cost, high failure rate, and the problem of requiring a large installation space. In addition, the surface of the sheet material 2 will have traces of suction tools such as the vacuum pad 3, and the back surface of the sheet material 2 will have scratches such as rollers from the conveyance table 1, so that the appearance of both the front and back sides of the sheet material 2 will be affected. There was a drawback that the product was damaged.

Furthermore, in the conventional air piling device shown in FIG. 4, when a thin plate is targeted, the wider the width, the more easily it bends, so there is a problem in that it is difficult to eject air uniformly and pile without trouble. Furthermore, when dealing with thick plates, it is necessary to increase the air volume in accordance with the increase in the weight of the sheet material, which increases equipment costs, increases noise, and raises surrounding dust. There is a drawback that it may penetrate between the materials 2 or into other equipment. Furthermore, the air piling device has a problem in that it is difficult to control the sheet material 2 to float properly.

Furthermore, since the foldable guide roller type device schematically shown in FIGS. 5A and 5B has a structure in which the sheet material 2 is supported on both sides, the central part of a thin plate with a wide width will bend due to its own weight. Therefore, it is difficult to use it for piling wide thin plates. In other words, if the central portion of a wide thin plate flexes significantly due to its own weight, the position of the sheet material 2 will shift due to the flexure, and the stacking position will vary greatly. Furthermore, when the sheet materials are dropped from a horizontal state, the sheet materials slide sideways due to the wind pressure caused by the air on the lower surface of the sheet materials, resulting in a problem that the stacking position is shifted. Furthermore, when a long material is to be used, there is a problem in that the number of guide rollers 6 must be increased.

In the case of the apparatus shown in FIGS. 6 and 7A to 7D, when the tip of the tilting table 31 is retracted to near the rear end of the sheet material 2 as shown in FIG. Similar to the situation shown in Figure A,
The sheet material 2 is supported only at its both ends, and therefore, in the case of a wide thin plate, the central portion is largely bent by its own weight, causing a problem that the sheet material is warped. Also, from the state shown in Fig. 7B,
When transitioning to the state shown in Figure C, that is, when the sheet material 2 is removed from the tip of the tilting table 31, the sheet material suddenly falls from an upwardly inclined position to a downwardly inclined position from the horizontal. Such a fall often damages the edges of the sheet material and also damages the surface of other sheet materials already loaded. Furthermore, while falling from the upward tilted position to the downward tilted position as described above, the sheet material passes through a horizontal state, as already described for the apparatuses shown in FIGS. 5A and B. The air on the bottom side of the stacks 2 cannot be removed smoothly, and the wind pressure of the air on the bottom side may cause the stacks to slide sideways, causing the stacking position to shift.

On the other hand, in the case of the apparatus shown in FIGS. 8 and 9A to 9D, the loading platform 35 must be moved back while converting from an inclined state to a horizontal state, which makes the device configuration complicated and failures likely to occur. In addition to the following problems, there are also the following problems. That is,
When transitioning from the state shown in FIG. 9B to the state shown in FIG. 9C, the sheet material 2 in the horizontal position falls down, causing the sheet material 2 to shift, resulting in a shift in the stacking position. In addition, especially in the case of a wide thin plate, when the state changes from Figure 9B to Figure 9C, the leading edge side of the sheet material flexes, and the position of the leading edge of the sheet material shifts by the amount of flexure, and the amount of flexure is not necessarily constant. Therefore, there is a problem in that the amount of deviation in the tip position also changes, and as a result, the stacking position also changes.

On the other hand, the aforementioned Utility Model No. 56-17249, Utility Model Application No. 57-
The device of No. 120544 requires a complicated mechanism such as a pantograph mechanism to extend and retract the inclined conveyor, which increases costs and makes it more likely to malfunction. I had a problem like this.

In other words, in the former device, the inclination conveyor expands and contracts in the inclination direction while maintaining its inclination angle constant, so the distance between the tip of the incline conveyor and the surface to be piled changes, which is especially true for the incline conveyor. Therefore, when the inclined conveyor is reduced after the sheet material reaches the piling position, the distance between the tip position of the inclined conveyor and the surface to be piled increases, so that the rear end of the sheet material is bends significantly, which causes the sheet material to warp. Also, when the sheet material is suddenly released from a greatly bent state,
There is a problem in that the trailing end of the sheet material drops suddenly, causing the pile position to fluctuate or damage to other sheet materials underneath.

On the other hand, in the latter device, the inclined conveyor is configured to expand and contract so that the tip of the inclined conveyor moves in a direction parallel to the piling surface, and as a result, the inclination angle of the inclined conveyor itself fluctuates. Therefore, when the inclined conveyor is contracted after the sheet material has reached the piling position by the inclined conveyor, the inclination angle of the inclined conveyor increases, so the rear end portion of the sheet material placed on the inclined conveyor becomes inclined. There is a risk that the sheet material will be deflected significantly along the angle of the conveyor, resulting in warping of the sheet material.

In view of the above-mentioned circumstances, this invention is not only applicable to many types of sheet materials with different widths and thicknesses, but also eliminates the risk of damaging the sheet materials and allows them to be stacked in a stable and uniform position. It is an object of the present invention to provide a piling device which can be easily bent, does not cause warping of the sheet material even when the sheet material is easily bent, and has a relatively simple structure and is inexpensive.

Means for Solving the Problems The sheet material piling device of this invention has a mechanism that lowers the sheet material toward the front end of the conveying table for conveying the sheet material so that the sheet material slides down due to its own weight. A tilted table reciprocates horizontally while maintaining a tilted state at a constant tilt angle between a forward position above the pallet on which sheet materials are stacked and a retreat position set back from the forward position in the conveyance direction. A sheet material is placed in contact with the front of the tilting table in the forward position to prevent the sheet material from moving forward and to allow the tip of the abutted sheet material to slide downward. The device is characterized in that a stopper is disposed, and a detector is further provided for detecting a sheet material that comes into contact with the stopper and outputting a signal for retracting the tilting table.

Effect: Therefore, the sheet material sent from the transport table onto the tilting table in the forward position descends diagonally along the top surface of the tilting table, hits the stopper and stops, and the detector detects the sheet material. To detect. Based on the output signal of the detector by detecting the sheet material, the tilting table moves backward in the horizontal direction while maintaining its tilted state. At this time,
Since the stopper allows the tip of the sheet material in contact with it to slide downward, the sheet material falls in an inclined state and is stacked on the pallet. In this way, the sheet material falls in an inclined state, so
Even if the sheet material is a wide thin sheet, the air on the lower surface side of the sheet material can be smoothly removed during falling, so that the sheet material falls onto the pallet without causing sideways sliding.
Further, when the sheet material falls, the tip of the sheet material comes into contact with the stopper and falls while sliding, so that the sheet material does not slip forward. Therefore, there is extremely little risk that the stacked positions on the pallet will shift. Further, even if the sheet material has a large area and a thin surface that is easy to bend, the leading end of the sheet material is regulated by the stopper while the rear end side falls down, so that displacement due to bending is prevented. In particular, since the tilting table retreats while maintaining a constant tilt angle, the distance between the tip position of the tilting table and the piling surface does not change. Since it is smoothly dropped onto the piling surface, there is little possibility that the sheet material will warp due to deflection due to its own weight. Furthermore, since the sheet material falls from the rear end side with its leading edge in contact with the stopper, the impact when it falls is extremely small, and therefore, the impact when the end of the sheet material hits the surface of the loaded sheet material is There is also very little risk of scratches occurring.

Embodiment Hereinafter, an embodiment of this invention will be described with reference to FIGS. 1 and 2.

FIG. 1 is a schematic plan view showing an embodiment of this invention, and FIG. 2 is a view taken along the - line,
A conveying table 11 for conveying an aluminum plate 10, which is a target sheet material, is configured by arranging roller tables 13 having drive rolls 12 in multiple rows in anticipation of the maximum width of the aluminum plate 10, The tilting table 15 transports the aluminum plates 10 sent by the table 11 to above the pallets 14 and stacks them on the pallets 14. and a position shown in FIG. 2) and a predetermined retracted position which is retracted from the forward position in the transport direction of the aluminum plate 10. That is, the tilting table 15 has a structure in which a plurality of free roller tables 17 each having a large number of freely rotating rollers 16 are arranged in parallel with each other, and each free roller table 17 is located between the roller tables 13 and horizontally arranged. The rear end of each free roller table 17 is attached to the movable table 18 so as to rotate around the axis, and a lever 19 is provided protruding from the rear end of each free roller table 17.
The tip of the lever 19 is screwed into a screw shaft 20 attached to the screw shaft 20, so that by rotating the screw shaft 20 with a handle 21 at its upper end,
The tip of the lever 19 is moved up and down, and as a result, the free roller table 17, which is integrated with the lever 19, is tilted downward to the front side and its tilt angle is adjusted. On the other hand,
The movable table 18 moves back and forth on the lower side of the conveyance table 11 in parallel to the feeding direction of the aluminum plate 10, and has wheels 23 engaged with guide rails 22 arranged on both left and right sides of the conveyance table 11. By connecting the air cylinder 24 as a drive device to the central part, the air cylinder 2
4, the aluminum plate 10 is moved back and forth in the feeding direction,
Therefore, the tilting table 15 integrated therewith is configured to reciprocate between the forward position and the retracted position described above.

Furthermore, the aluminum plate 10 is brought into contact with the front side of the tilting table 15 in the forward position, and the pallet 14 is
A stopper 25 for stopping above the tilting table 15 is arranged over almost the entire width of the tilting table 15. As is clear from the figure, the stopper 25 is configured to prevent the aluminum plate 10 from moving forward, but to allow the tip of the aluminum plate 10 in contact with it to slide downward. A phototube 26 serves as a detector for detecting the aluminum plate 10 brought into contact with the stopper 25 and stopped.
is arranged near the stopper 25, and the air cylinder 24
is operated to move the tilting table 15 to the backward position. Note that after the aluminum plate 10 in contact with the stopper 25 comes to rest, the tilting table 1
5, a delay device such as a timer (not shown) is incorporated into the control device that controls the forward and backward movement of the tilting table 15.
After detecting the aluminum plate 10, the tilting table 15 is moved back after a certain period of time has elapsed. Further, the return of the tilting table 15 to the forward position is, for example, when the tilting table 15 reaches the backward position.
This is done by operating a limit switch (not shown), which causes the air cylinder 24 to operate in the opposite direction.

Aluminum plate 10 produced by the apparatus of the above embodiment
The piling process will be explained. For reference, the outline of the piling process is broken down and shown in Figures 10 and 11.
In the figure, the feeding direction of the aluminum plate as the sheet material to be loaded is the same as in the conventional example shown in Figures 7 and 9, so the left and right directions are opposite to those in Figures 1 and 2. ing. Moreover, FIGS. 10A to 10D show the case where the aluminum plate 10 as a sheet material is a plate that is relatively hard to bend, and FIG. 11 shows the case where the aluminum plate 10 is a plate that is easy to bend.

First, referring to FIGS. 10A to 10D, the aluminum plate 10 sent from the previous process is transferred to the tilting table 15 in the forward position by the conveyance table 11.
However, since the tilting table 15 is constituted by a free roller table 17 and is tilted downward toward the front end, the aluminum plate 10 moves forward on the tilting table 15 by its own weight, and the stopper 25 It hits and stops (see Figure 10A). The phototube 26 detects the aluminum plate 10 sent above the pallet 14 in this way and outputs a signal. After the plate 10 stops vibrating and comes to rest, the tilting table 15 rapidly moves backward together with the movable base 18 by the air cylinder 24 while maintaining its tilted state (FIG. 10B). As a result, the aluminum plate 10 loses its support from the lower surface side, so the tip falls while sliding on the surface of the stopper 25 (FIG. 10 B → C → D), and the pallet 1
Stacked on top of 4. At this time, aluminum plate 10
Since the plate falls in an inclined state towards the stopper 25 side, even in the case of a thin plate, the air underneath is smoothly removed and the plate falls straight without any sideways sliding movement. Furthermore, even if the aluminum plate 10 is thin and may move even with slight wind pressure, the force will act in the direction of the front end of the sheet material (to the left in Fig. 10), and the stopper 25 will be located in that direction. Therefore, the aluminum plate 10 will not shift. Furthermore, the stopper 25 naturally prevents the aluminum plate from shifting forward due to its own weight when it slides down from the tilting table 15. On the other hand, the tilting table 15 which has reached the retracted position where it does not interfere with the fall of the aluminum plate 10 is moved by the air cylinder 24.
is returned to the forward position by operating in the opposite direction to the previous one, in preparation for piling the subsequent aluminum plate 10.

On the other hand, when the aluminum plate 10 has a large area and a thin wall that easily bends, the front part of the aluminum plate 10 that is detached from the tilting table 15 bends downward due to its own weight, and the piling surface It will be on top. At this time, displacement due to deflection is prevented by the stopper 25, so even in the case of the aluminum plate 10, which is easily deflected, it can be uniformly aligned without causing any particular positional shift. When the tilting table 15 retreats, the tilting angle of the tilting table 15 does not change, and the distance between the tip of the tilting table 15 and the lower piling surface also does not change, so the tilting table 15 retreats. At times, the amount of deflection of the rear end portion of the aluminum plate 10 remaining on the tilting table 15 does not become particularly large, and therefore there is little risk of warping occurring due to the deflection of the aluminum plate 10. That is,
Since the tilting table moves horizontally while maintaining its original tilted state, the rear end of the aluminum plate 10 falls smoothly onto the piling surface, causing warping due to bending. Not only is there little risk, but the pile position will not shift in the width direction or rearward due to sudden dropping, and there will be no damage.

As described above, the aluminum plate 10 is advanced by the conveyance table 11 and the tilting table 15 so that its tip comes into contact with the stopper 25, and the tilting table 15 is moved backward while maintaining its tilted state. are dropped and stacked on a pallet 14, the entire aluminum plate 10 is supported by a tilting table 15, and the tilting table 15 is moved back horizontally while maintaining the original tilt angle. Therefore, there is no risk of suction marks being left on the aluminum plate 10 and damaging its appearance, and the simple control of simply moving the tilting table 15 back and forth without restrictions on plate thickness or width ensures that the aluminum plate 10 is always correct. Piling can be performed in an aligned manner, and even in the case of the aluminum plate 10, which is particularly susceptible to bending, there is little risk of warping due to bending due to its own weight.

In the above embodiment, the phototube 26 was used as a detector, but this invention is not limited to the above embodiment, and can be applied to a switch that operates by being pushed by a sheet material, a switch that operates by the approach of a sheet material, etc. Various types of equipment can be used as detectors. Further, the drive device that moves the tilting table 15 back and forth is
The air cylinder 24 is not limited to the air cylinder 24, and means conventionally used in various fields such as a motor or a hydraulic cylinder can be employed.

Effects of the invention As is clear from the above explanation, the device of this invention has a tilting table that moves back and forth in the horizontal direction while maintaining a tilted state at a constant tilt angle, and an aluminum plate that slides down on the tilting table. Since the structure uses a stopper that abuts the tip of the sheet material such as a plate and prevents it from moving forward, but allows the tip of the sheet material to slide downward, a suction mark is created on the surface of the sheet material. Not only is there no risk of damaging the appearance, but the sheet materials can always be stacked in a uniform and correct position in an aligned manner, and even when applied to sheet materials that are easily warped, such as wide and thin sheets, it is possible to stack them correctly. In addition, there is less risk of unnecessary warping of the sheet material due to deflection due to its own weight when the tilting table retreats, and there is also less risk of damaging the surface of the sheet material when dropping the sheet material. It is ideal for materials that require good surface appearance characteristics, and furthermore, it is easy to control and simplifies the overall configuration, since all you need to do is move the tilting table back and forth. effect can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view showing an embodiment of this invention, FIG. 2 is a view taken along the - line in FIG. 1, and FIG. 3 is a schematic plan view showing a conventional vacuum pad type device.
Fig. 4 is a schematic diagram showing a conventional air piling device, Fig. 5 is a diagram showing a conventional collapsible guide roller type device, A is a schematic front view thereof, B is a plan view of the same, and Fig. 6 7 is a schematic diagram showing an example of another conventional piling device, FIGS. 7A to D are schematic diagrams showing an exploded piling process using the device in FIG. 6, and FIG. 8 is an example of still another conventional piling device. 9A-D are schematic diagrams showing an exploded piling process using the apparatus of FIG. 8, and FIGS. 10A-D
1 and 2 are schematic diagrams showing an exploded piling process using a device according to an embodiment of this invention, and FIG. 11 shows a method for piling sheet materials that are particularly easy to bend using the device according to the above embodiment. FIG. 10...Aluminum plate, 11...Transportation table, 1
4... Palette, 15... Inclined table, 24...
...Air cylinder, 25...Stopper, 26...
...Phototube.

Claims (1)

[Scope of utility model registration request] At the front end of the conveyance table for transporting sheet materials, there is an inclined table that is tilted so that it descends toward the front in the conveyance direction so that the sheet materials slide down due to their own weight. The seat is arranged to reciprocate horizontally while maintaining the tilted state at a constant tilt angle between the forward position and the retracted position in the forward direction, and a sheet is placed in front of the tilting table in the forward position. A stopper is arranged to abut the sheet material and prevent the sheet material from moving forward, while also allowing the tip of the abutted sheet material to slide downward.Furthermore, the stopper detects the sheet material that comes into contact with the stopper and stops. A piling device for sheet material, characterized in that the device is provided with a detector that outputs a signal for retracting a tilting table.