JPH0333618B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for transporting sheet-like objects such as bags and paper to other locations one by one, and a machine used therefor.

In the process of manufacturing bags, printing on paper, etc., it may be necessary to transport these bags, sheets of paper, etc. one by one to another location.

Conventionally, as shown in FIGS. 1 to 4, such a sheet conveying machine includes a lifting device 3 having a fork 2 at the front end of a conveying belt 1.
A suction cup device 4 is provided above, and an auxiliary support device 6 having a fork 5 is provided on the upper side of the lifting device 3.

First, as shown in FIG. 1, a plurality of stacked sheets A, which are sequentially conveyed by the conveyor belt 1, are supported and lifted by the fork 2 of the lifting device 3, and a suction device provided above the sheet material A is lifted. 4, and feeds the sheet-like material A one by one to another conveyor belt (another location) 7.

In this way, the sheet material A is transferred to the conveyor belt 7.
Then, when the stacked sheet material A on the forks 2 of the lifting device 3 reaches a certain amount or less, an auxiliary support provided on the upper side of the lifting device 3 is moved as shown in FIG. The fork 5 of the device 6 is projected under the laminated sheet material A to temporarily support it.

During this time, the fork 2 of the lifting device 3 is lowered to support the next stacked sheet material A to be conveyed, as shown in FIG. During this time, the sheet-like material A supported by the fork 5 of the auxiliary support device 6 is sucked by the suction cup device 4, and is fed one by one to another conveyor belt 7.

After that, as shown in FIG. 4, the next laminated sheet material A supported by the fork 2 of the lifting device 3 is raised and brought into contact with the remaining upper sheet material A. Pull back the fork 5 of the auxiliary support device 6 to the same state as shown in FIG. It is being transported.

By the way, when the stacked sheet material A on the fork 2 of the elevating device 3 reaches a certain amount or less in the process of transporting the sheet material, the fork 5 is pushed out under the stacked sheet material A to temporarily move the sheet material A. In order to prevent the protruding fork 5 from penetrating the side surface of the stacked sheet material A, the supporting operation by the auxiliary support device 6 is performed so that the protruding fork 5 does not pierce the side surface of the stacked sheet material A, as shown in FIG. A suitable gap α is provided between the fork 5 and the fork 5, and the stacked sheet material A is supported by protruding the fork 5.

However, if such a margin is provided, when the fork 2 of the lifting device 3 is lowered, the sheet-like object A will fall to the position of the fork 5, and the suction reference surface t will become the lower surface of the sheet-like object A. There is a problem in that the sheet material A is lowered by the gap α between it and the fork 5, and therefore the suction by the suction cup device 4 becomes unreliable, and the sheet-like material A cannot be smoothly conveyed to the other conveyor belt 7.

Therefore, it is best to leave no gap α between the lower surface of the sheet-like object A and the fork 5, but sheet-like objects A such as paper bags generally have some unevenness due to the material, etc. Due to these reasons, as shown in FIG. 6, the fork 5 may pierce the side surface of the laminated sheet material A, causing breakage or damage.

Therefore, it is necessary to provide an appropriate gap α between the lower surface of the sheet material A and the fork 5.
As a result, it is inevitable that the suction reference surface t of the sheet-like object A will be lowered from the predetermined position, making the suction of the sheet-like object A uncertain, or that the sheet-like object A will not be suctioned at all. There was a problem in which the sheet material A could not be sent smoothly and reliably one by one to another location.

The present invention has been made to solve this problem, and by keeping the suction reference surface constant at all times, the present invention provides a sheet-shaped material that can be smoothly and reliably fed to other locations one by one. The purpose of this invention is to provide a method for transporting objects and a machine used therefor.

Hereinafter, the present invention will be explained in detail based on the drawings.

FIG. 7 to FIG. 11 show an embodiment of the sheet-like material conveying method according to the present invention in the order of steps.

(a) As shown in Fig. 7, a plurality of laminated sheets A, such as paper bags, are sequentially conveyed from the rear end to the front end using a conveyor belt 8, with a desired amount of laminated paper bags being conveyed. Laminated paper bags A,
The transport belt 8 is supported and raised by forks 10 of a lifting device 9 provided at the front end thereof.

(b) Starting from the time when the uppermost paper bag of the stacked paper bags A that is rising reaches a predetermined position, that is, the suction reference surface t, the paper bag A is suctioned using the suction cup device 11 provided above the lifting device 9. Each sheet is sent to another location, for example, another conveyor belt 12.

(c) Then, when the stacked paper bags A on the fork 10 of the lifting device 9 reach a certain amount or less, the eighth
As shown in the figure, the forks 14 of the auxiliary support device 13 provided on the upper side of the lifting device 9 are pushed out diagonally below the remaining stacked paper bags A supported on the forks 10 of the lifting device 9. ,
Thereafter, as shown in FIG. 9, the fork 14 of the auxiliary support device 13 was corrected horizontally and the paper bags A were stacked.
temporarily support. In this operation, an auxiliary support device 13 having a fork 14 provided in a part of the sheet-like material conveying machine is moved to a guide plate 16 that rotates about a shaft 15 as a fulcrum.
4 and a fork with a cam 17 provided at the lower part of the guide plate 16, for example, the rotation of the motor is transmitted to the fork 14 by a rack and pinion, and as shown in FIG. The forks 14 of the auxiliary support device 13 are projected diagonally from the guide plate 16 which is tilted downwardly under the stacked paper bags A, and then the cam 17 provided at the lower part of the guide plate 16 is rotated as shown in FIG. The stacked paper bags A are temporarily supported by correcting them horizontally. A tension coil spring 18 is provided at the tip of the guide plate 16 so that the cam 17 is always in contact with the guide plate 16 and the movement of the cam 17 is well transmitted to the guide plate 16.

In this way, the fork 1 of the auxiliary support device 13
4 in a diagonal direction under the stacked paper bag A,
After that, by supporting the fork 14 horizontally, the fork 14 will not pierce the side surface of the stacked paper bags A, and the position of the suction reference surface t of the uppermost paper bag of the stacked paper bags A will not change at all. It does not decline and remains almost constant.

(d) During this time, as shown in FIG. 10, the forks 10 of the lifting device 9 are lowered and the next stack of paper bags A, which is being conveyed by the conveyor belt 8, is supported by the forks 10 of the lifting device 9 and lifted up. .
During that time, the paper bag A supported by the fork 14 of the auxiliary support device 13 is moved to the suction cup device 11.
The paper is adsorbed and sent one by one to another conveyor belt 12. The support of the auxiliary support device 13 by the fork 14 ensures that the position of the suction reference surface t of the uppermost paper bag of the stacked paper bags A is always maintained in a substantially constant state, so that suction by the suction cup device 11 is ensured. Paper bags A can be reliably sent one by one to another conveyor belt 12.

(e) After that, as shown in FIG.
The next stacked paper bag A supported by the fork 10 of
the fork 1 of the auxiliary support device 13.
Contact the remaining upper paper bag A supported by 4.

(f) In this state, the fork 14 of the auxiliary support device 13
is pulled back from between the stacked paper bags A, the cam 17 provided at the bottom of the guide plate 16 is further rotated, and the state shown in FIG. 7 is achieved by the action of the tension coil spring 18, and then (a) The operation shown in (a) and then the operation shown in (b) are performed, and the same operations are repeated again to continuously convey the paper bags A one by one to the other conveyor belt 12.

If paper bag A is transported using this method,
There is no need to leave a gap at all between the bottom surface of the paper bag A and the fork 14 of the auxiliary support device 13.
Even if the auxiliary support device 1 has some unevenness due to the material etc. or is slightly deformed due to moisture etc.
The fork 14 of No. 3 will not pierce the side of the stacked paper bags A and cause breakage or damage.

Moreover, since the position of the suction reference surface t of the uppermost paper bag of the stacked paper bags A is always maintained almost constant, the suction of the paper bag A by the suction cup device 11 is always good, and the suction of the paper bag A is improved. There is no possibility that the paper bag A will not be attracted or that it will not be picked up, and the paper bag A can be reliably and accurately fed to the other conveyor belt 12. Therefore, subsequent work becomes extremely smooth.

In the above embodiment, the auxiliary support device 13 having the fork 14 of the machine used in this method is provided with the fork 14 guided by the guide plate 16 that rotates about the shaft 15 as a fulcrum, and the fork 14 is attached to the lower part of the guide plate 16. A cam 17 is provided so that, for example, the fork 14 is projected diagonally below the stacked paper bags A using a rack and pinion.
The means for protruding the fork 14 in an oblique direction is not limited to this, but may be a crank mechanism or the like. Also, the fork position adjusting means for leveling the fork 14 that has protruded diagonally is not based on a cam, but may be an air A cylinder, oil cylinder, solenoid, etc. are used.

In addition, although the above embodiment shows an example in which the present invention is applied to the conveyance of paper bags, it goes without saying that the present invention is applicable not only to the conveyance of paper bags but also to the conveyance of other sheet-like objects such as synthetic resin bags, sheets, and paper. stomach.

As described above, according to the present invention, the forks of the auxiliary support device do not pierce the side surfaces of the stacked sheets, and the suction reference surface on the top of the stacked sheets is always kept constant. This ensures the suction by the suction cup device and allows each sheet-like object to be smoothly and accurately conveyed to another location.

[Brief explanation of the drawing]

Figures 1 to 4 are schematic side views of each process showing a conventional sheet-like material conveying method in order of process;
The figure is a schematic side view showing a state in which a stacked sheet-like object is supported by the forks of a conventional auxiliary support device, and Figure 6 shows a state in which the side surface of a stacked sheet-like object is pierced with a fork of a conventional auxiliary support device. FIGS. 7 to 11 are schematic side views showing each process in order of process in an embodiment of the sheet-like material conveying method of the present invention. 8, 12... Conveyor belt, 9... Lifting device, 1
0,14...fork, 11...suction cup device, 13
... Auxiliary support device, 15 ... Shaft, 16 ... Guide plate, 17 ... Cam, 18 ... Tension coil spring, A
...sheet-like object (paper bag), t...suction reference surface.

Claims (1)

[Scope of Claims] 1. The laminated sheets that are being conveyed one after another are lifted by a fork of a lifting device and sucked by a suction cup device provided above the lifting device, so that the sheet-like objects are separated one by one from other sheets. When the stacked sheets on the fork of the lifting device reach a certain amount or less, the fork of the auxiliary support device provided on the upper side of the lifting device is pushed out below the stacked sheet. During this time, the next stack of sheets conveyed by the lifting device is lifted up, and during this time, the sheets supported by the forks of the auxiliary support device are lifted one by one using a suction cup device. In a method of transporting sheet-like materials in which the sheet-like material is continuously transported by transporting the sheet-like material to another location, when the amount of stacked sheets on the fork of the lifting device reaches a certain level or less, the lifting device is stopped. The fork was pushed out diagonally under the stacked sheet-like material supported on the fork by a pushing means provided on the auxiliary support device, and then the fork was corrected horizontally by the fork correction means provided on the auxiliary support device and then stacked. The sheet-like object is temporarily supported, and then the next laminated sheet-like object supported by the fork of the lifting device is raised to come into contact with the remaining sheet-like object supported by the fork of the auxiliary support device. A method for conveying a sheet-like object, characterized in that the uppermost suction reference surface of the stacked sheet-like objects is held constant by pulling back the fork of the auxiliary support device in this state. 2. The stacked sheet materials that are being conveyed one by one are lifted by a fork of a lifting device, sucked by a suction cup device provided above the lifting device, and the sheet materials are conveyed one by one to another location, and the When the amount of stacked sheets on the fork of the lifting device reaches a certain level or less, the fork of the auxiliary support device provided on the upper side of the lifting device is protruded below the stacked sheet to temporarily support it. During this time, the next stack of sheets conveyed by the lifting device is raised, and during this time, the sheet materials supported by the forks of the auxiliary support device are conveyed one by one to another location using the suction cup device. In a machine used for a sheet-like material conveying method in which the sheet-like material is continuously conveyed using A method for conveying a sheet-like object, characterized in that a means for projecting a fork in an oblique direction, and a fork position correction means for horizontally correcting the fork projecting at an angle to temporarily support the stacked sheet-like object are provided. A machine used for