JPH0699044B2 - Flexible felt mat work stacking method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a work in the form of a flexible felt mat that is cut to a predetermined size, for example, a work that is a material used for door parts of automobiles by press molding. TECHNICAL FIELD The present invention relates to a method and apparatus for stacking flexible felt mat-shaped works which are conveyed and stacked in a pallet shape.

[Prior Art] Conventionally, stacking of plate-shaped works on a pallet has been performed manually, and mechanically, the plate materials have been sucked by a suction type moving device.

[Problems to be Solved by the Invention] However, the flexible felt mat-like work is permeable to air and cannot be adsorbed and moved by the adsorption type moving device.

Further, when stacking the works, it is extremely difficult to orderly and stack the works by being disturbed by the air between the works and the pallet or the works.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a stacking method and an apparatus for stacking flexible felt mat-shaped works on a pallet in an orderly manner.

[Means for Solving the Problems] In the method according to the present invention, a work conveyed by a conveyor from the front is successively transferred from the trailing edge of the work onto a moving table that can move forward and backward and in reverse in synchronization with the conveyor. Hold and fix the trailing edge of the workpiece at the end of the table
In the initial stage of the advance of the moving table, the trailing edge of the work is lowered onto the pallet to release the holding and fixing, and the work is disturbed by the air between the work and the pallet from the trailing edge side in accordance with the advance of the moving table. Instead, it is placed smoothly on the pallet one by one, then the pallet is sequentially lowered by the thickness of the work and the above operation is repeated to stack the work on the preceding work, and when the predetermined number of works are stacked, the pallet is It is characterized in that it is lowered and carried out by a carry-out conveyor.

The apparatus according to the present invention includes a conveyor for conveying a work from the front, a movable table which can be moved backward and forward in synchronism with the conveyor, a forward-backward moving means for moving the movable table forward and backward, and a rear end of the movable table. On the pallet or on the work stacked on the pallet by gripping and fixing the trailing edge of the work through the notch formed in the trailing edge of the moving table and lowering the trailing edge of the work in the initial stage of advance of the moving table. It is characterized in that a holding means for releasing the pallet, a pallet lowering means for placing the pallet and lowering the pallet, and a carry-out conveyor are provided.

The forward / backward moving means includes a crank rotated by a motor, a link having one end connected to the crank, a lever pivotally attached to a mount and connected to the other end of the link midway, and a tip of the lever. It is preferable that the link lot has one end connected and the other end connected to the trailing edge of the moving table.

Further, the gripping means includes a base that is vertically movable by an air cylinder, a plurality of gripping arms that are provided on the support shaft that is axially supported by the base with a gap therebetween, and an arm that is provided so as to project on the support shaft.
An air cylinder interposed between the arm and the base,
It is preferable to be configured by a frame provided on the base so as to be able to move forward and backward, an air cylinder interposed between the frame and the base, and a gripping piece having the same shape as the gripping arm provided on the frame.

The elevating means includes sprockets provided on the upper and lower portions of both sides of the frame, a chain wound around the upper and lower sprockets, a shelf on the chain for mounting a pallet, and a motor for driving the sprockets. It is preferable that the first table lifter is used.

In addition, a second table lifter similar to the first table lifter is provided in front of the first table lifter, and the lower surfaces of the first and second table lifters have upper surfaces higher than the upper surface of the carry-out conveyor and lock the trailing edge of the pallet. A pulling conveyor equipped with a hook is provided, and a moving conveyor equipped with a hook for moving the raised pallet to the first lifter side is provided above the second table lifter, and the pallet is moved to the second table lifter side on the gantry. At this time, it is preferable to provide a wall body for locking the works stacked on the pallet, pulling out the pallet, and dropping the pallet onto the carry-out conveyor.

[Operation] Therefore, one piece of the work carried out by the conveyor moves from the conveyor to the moving table moving backward, and the trailing edge of the work is gripped by the gripping device at the end of the moving table moving backward. Next, the moving table advances, but when the trailing edge of the work is lowered onto the pallet and the grip of the work is released, the work is gradually placed on the pallet from the trailing edge to the leading edge. That is, the moving table moves forward with the work placed on the pallet and places the next work.

In this way, when one piece of work is placed on the pallet, the rear end thereof is positioned in advance, so that it does not fall freely and is placed smoothly without being obstructed by air.

When one work is placed on the pallet, the work height increases by the thickness of the work, so the work space is lowered by the thickness of the pallet and the work is sequentially stacked in the same manner.

Therefore, the works are orderly stacked on the pallet.
The works stacked in this manner are carried out to a predetermined position by the carry-out conveyor.

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

1 to 3, a stacking device embodying the present invention is configured such that a stacking device includes a feed conveyor 2 provided on an upper front side of a pedestal 1 (hereinafter, a left side in the drawing is a front side), and a front side feeds on an upper beam 1a. The stacking conveyor 3 provided below the conveyor 2 in an overlapping manner, the movable table 4 which is guided by the upper beam 1a and is movable forward and backward between the lower part of the stacking conveyor 3 and a gripping device 30 described later, and a movable table 4. A forward / backward moving device 10 which is a forward / backward moving means, a first table lifter 20 which is a lowering means for placing the pallet P and lowering it from below the moving table 4 at the rear position, and a pallet P for the stacking conveyor. And a pull-out conveyor 40 that pulls out the stacked works W by the movement and drops them on the carry-out conveyor 7 described later, and carries out the dropped works W to the rear. Outgoing conveyor 7, second table lifter 20A that raises the moved pallet P, moving conveyor 43 that moves the raised pallet P to the first table lifter 20, and work that is moved to the last stage of the backward movement of moving table 4. The rear edge of W is composed of a gripping device 30 which is a gripping means for gripping and fixing the trailing edge of W and lowering the trailing edge of the work W onto the pallet P by descending in the initial stage of advance of the moving table 4. The workpieces W that have been conveyed and stacked are taken out.

At this time, the work W may be placed on the table 8 as shown in FIG. 1, but the table 8 may not be used.

The moving table 4 is movably provided inside the upper beams 1a, 1a of the gantry 1, and its rear end is connected to the upper ends of a pair of levers 11 of the forward / backward movement device 10 by a link rod 12. The lever 11 is pivotally attached to the base beam 1b, and the lower side is connected to the crank 13 by a link 14. The crank 13 swings the range between the solid line position and the chain line position to move the movable table 4
Is designed to move forward and backward.

4 to 6, the first and second table lifters 20 and 20A have substantially the same structure, and will be referred to as the first
The table lifter 20 will be described.

The upper beam 1a and the lower beam 1b of the frame 1 have brackets 21a,
Bearings 22 and 22 are fixedly provided via 21b. These bearings 2
The rotary shafts 23a and 23b are rotatably supported by the rotary shafts 2 and 22, respectively.
23b is connected to the drive shaft 25 via bevel gears 24a, 24b. The rotating shafts 23a and 23b have sprockets 26,
26 is fixed, and the chain 27 wound around the sprockets 26, 26 is provided with L-shaped shelves 28 on which the pallets P are placed at a plurality of positions. However, hydraulic drive may be used instead of chain drive, and chain drive and hydraulic drive may be partially used together.

In FIGS. 5 and 6, the gripping device 30 is provided on a base 31 which can be raised and lowered by an air cylinder 32. One end of an air cylinder 33 is pivotally attached to the upper surface of the base 31 while tilting forward, and the other end is pivotally attached to an arm 35 fixed to a support shaft 34 pivotally supported by a protruding portion of the base 31. ing. A plurality of gripping arms 36 are projectingly provided on the support shaft 34 with a gap therebetween, and are expanded and contracted by the air cylinder 33 so as to be rotated between a solid line position and a chain line position. The base 31
A frame 38 that is moved forward and backward by the expansion and contraction of the air cylinder 37 is provided therein. At the front edge of the frame 38, a gripping piece 39 having the same shape as the gripping arm 36 for projecting and fixing the rear edge of the work W in cooperation with the gripping arm 36 at the forward position of the frame 38 is projected. . As shown in FIG. 7, the rear edge of the moving table 4 is provided with a notch 5 which is slightly larger than the shapes of the gripping arm 36 and the gripping piece 39. Reference numeral 6 in the drawing is a magnet. Unless the movement end position of the moving table 4 is defined and the edge portion, that is, the trailing edge portion is positioned at a predetermined position in the movement direction of the works W, the stacking work after the above-mentioned gripping work is not constant. In order to keep the stacking work constant, it is necessary to retract the stopper 50 after it is positioned on the moving table 4 because it interferes with the gripping work. Therefore, as shown in FIG. 7a, this stopper 50 is provided on a bracket 52 pivotally attached to the moving table 4 by a hinge 51. The magnet 6 is attached to the bracket 52
It is provided in. With the movement of the gripping piece 39 (Fig. 6),
The surface 39a of the gripping piece 39 engages with the tapered surface 53 of the bracket 52, and as a result, the magnet 6 loses the attraction force, and the bracket 52 moves downward about the hinge 51. Therefore, the stopper 50 does not project. When the moving table 4 makes a return motion, the roller 39b (FIG. 3) engages with the tapered surface 39c of the bracket 52, the magnet 6 is attracted to the moving table 4, and the stopper 50 projects. Since the stopper 50 is projected and retracted by the magnet 6 in this way, energy for operating the stopper 50 is unnecessary.

In FIG. 8, the pull-out conveyor 40 is provided with a hook 42 for locking the rear edge of the pallet P guided by the guide frame 41, as shown in FIG. Then, when the hooks 42 move forward, the works W stacked on the pallet P are locked by the wall portion 1c provided in the width direction of the frame 1 and pulled out as shown in FIG. It is designed to be dropped and placed on top.

In FIG. 9, the moving conveyor 43 has a pallet P on the upper part of the second table lifter 20A as shown in FIG.
A hook 45 for locking the front edge of the guide rail is provided so as to be guided by the guide rail 44. Reference numeral 46 in the figure is a tension adjuster.

In FIG. 3, M1 is a drive motor for the feed conveyor 2, M2 is a drive motor for the stacking conveyor 3, and M3 is a crank.
13 drive motors, M4 and M5 are motors for the pull-out conveyor 40 and the first table lifter, M6 and M7 are motors for the carry-out conveyor and the second table lifter, and S1 is provided on the rear end inclined portion 3a of the stacking conveyor 3. A photoelectric switch for detecting the workpiece W and moving the moving table 4 forward, S2 a starting position confirmation switch for the moving table 4, S3 a stop switch for the moving table 4, S4 a start switch for the gripping device 30, and S5 a moving conveyor 43. Pallet insertion start switch, S6 and S7 are gripping devices 30
Release switch, S8 is a position confirmation switch for hook 42, S9
Is the pallet extraction start switch of the extraction conveyor 40, S1
0 is a pallet extraction return completion switch of the extraction conveyor 40, S11 is a pallet P extraction completion switch, S12 is a pallet extraction confirmation switch, S13 is a second table lifter 20A lift completion switch, S14 is a pallet P upper limit absence switch, S15 is a hook 45 position confirmation switch, S16 is a return completion switch of the moving conveyor 43, S17 is a pallet P insertion completion switch, S18 is a pallet P insertion confirmation switch, S19 is a stack level photoelectric switch, and S20 is a first switch. A lowering stop switch of the table lifter 20 and a carry-out completion switch S21 of the take-out conveyor 40.

At the time of stacking the works W, one work W that is cut into a width dimension by a slitter and cut into a length dimension by a cutter is sent from the feed conveyor 2 to the stacking conveyor 3.
At that time, the trailing end of the work W hangs down from the trailing end of the feed conveyor 2 onto the stacking conveyor 3, and the entire one work W is gradually moved, but since they are synchronized, there is no wrinkle. . When the photoelectric switch S1 detects the work W on the stacking conveyor 3, the lever 11 rotates rearward, the moving table 4 is moved backward in synchronization with the conveying speed of the stacking conveyor 3, and the work W is moved from the trailing edge thereof to the above-mentioned state. It is received as in the case of the stacking conveyor 3.

It should be noted that the work can be moved smoothly by providing the stacking conveyor 3, but the work W may be moved directly from the feed conveyor 2 to the moving table 4 without providing the stacking conveyor 3. When the moving table 4 comes slightly ahead of the retracted position, the proximity switch S4
The gripping arm 36, which has been rotated upward in response to the detection signal from, rotates downward and cooperates with the gripping piece 39 in the forward position to grip and fix the trailing edge of the work W. Next, when the lever 11 rotates forward and the moving table 4 moves slightly forward, the proximity switch
The air cylinder 32 contracts in response to a detection signal from S7 to lower the base 31 to bring the trailing edge of the work W close to the upper surface of the pallet P, and the detection signal from the proximity switch S6 causes the gripping arm 36 to rotate upward. At the same time, the gripping piece 39 moves backward to place the trailing edge of the work W on the pallet P. Accordingly, the work W is smoothly moved and placed on the pallet P sequentially from the trailing edge side without being obstructed by the air between the work W and the pallet P in response to the forward movement of the moving table 4. Then, the first table lifter 20 is operated to activate the photoelectric switch S19.
When the pallet P is lowered by the thickness of the work W by the detection signal of the
Are sequentially stacked. In this way, the pallet P on which the works W are sequentially stacked may be moved to a predetermined position as it is.

However, it is preferable to circulate the pallet P in order to perform the next work while the pallet P is moving. Therefore, in the preferred embodiment of the present invention, the second table lifter 20 is used.
A is provided. The operation will be described below. When a counter (not shown) counts by the photoelectric switch S1 that the stacking of a predetermined number of W is completed, the first table lifter
20 moves down the first pallet P and the moving conveyor 43 operates backward, and the hook 45 causes the second pallet P previously placed on the uppermost shelf 28 of the second table lifter 20A to move to the second position. 1 Move to the uppermost shelf 28 of the table lifter 20. Next, when the first pallet P that is descending is placed on the pull-out conveyor 40, the switch S9 detects it, the pull-out conveyor 40 operates forward, and the hook 42 moves the pallet P to the second table lifter 20A side. Then, the stacked works W are locked by the wall portion 1c (FIG. 10) of the gantry 1 and pulled out, and are dropped and placed on the transport conveyor 7. Then,
The conveyors 7 are operated to convey the stacked works W to the rear, and the workpieces W are conveyed to the outside of the apparatus while being placed on the conveyor 7 or on the take-out table 8. In this way, by combining the pallet P with the second table lifter 20A and the pulling conveyor 40, efficient work can be performed.

EFFECTS OF THE INVENTION Since the present invention is configured as described above, a flexible mat-like felt-like object is stacked on a pallet in an orderly manner without being disturbed by the air between the pallet or the preceding work. be able to.

[Brief description of drawings]

1 and 2 are a side view and a top view showing the outline of a stacking device for carrying out the present invention, and FIG. 3 is a side view showing the details,
FIG. 4 is a front view showing the table lifter, FIGS. 5 and 6.
The figure is a top view and a side view showing the gripping device, FIG. 7 is a top view including a side sectional view showing the rear part of the moving table, FIG. 7a is a sectional view of FIG. 7, and FIG. 8 is a side view showing a pulling conveyor. Figure,
FIG. 9 is a side view showing the moving conveyor, and FIG. 10 is a side view for explaining a drawing-out state of works stacked on a pallet. P ... Pallet, W ... Work, 1 ... Stand, 2 ... Feed conveyor, 3 ... Stacking conveyor, 4 ... Moving table, 5 ... Notch, 7 ... Unloading conveyor, 10 ... Forward / backward movement Device, 11 …… Lever, 12 …… Link rod, 13 ……
Crank, 14 …… link, 20 …… first table lifter,
20A …… Second table lifter, 27 …… Chain, 28 ……
Shelf, 30 ... Gripping device, 31 ... Base, 32, 33, 37 ... Air cylinder, 34 ... Spindle, 35 ... Arm, 36 ... Gripping arm, 38 ... Frame, 39 ... Gripping piece , 40 …… Pulling conveyor, 42, 45 …… Hook, 43 …… Moving conveyor

Claims (2)

[Claims] 1. A workpiece conveyed by a conveyor from the front is successively transferred from a trailing edge of the workpiece onto a moving table which moves backward and forward in synchronization with the conveyor so as to move the trailing edge of the workpiece at the trailing end of the moving table. Grasping and fixing, the trailing edge of the work is lowered onto the pallet at the initial stage of the advance of the moving table to release the holding and fixing, and the work is moved from the trailing edge side to the air between the work and the pallet according to the advance of the moving table. Place them smoothly on the pallet without interruption, then lower the pallet by the thickness of the work pieces one by one and repeat the above operation to stack the work pieces on the preceding work pieces, and stack the predetermined number of work pieces. When finished, a method of stacking flexible felt mat-like works is characterized in that the pallet is lowered and carried out by a carry-out conveyor. 2. A conveyor for conveying a work from the front,
Through a movable table that can move back and forth in synchronism with the conveyor, a forward-backward moving means for moving the movable table forward and backward, and a notch formed in the rear edge of the moving table at the end of the backward movement of the moving table. Grasping means for gripping and fixing the trailing edge of the work and lowering the trailing edge of the work to release it onto the pallet or the work stacked on the pallet at the initial stage of advance of the moving table, and the pallet is placed and the pallet is lowered. A stacking device for flexible felt mat-like works, which is provided with a pallet lowering means for carrying out and a carry-out conveyor.