JPH0811835A - Apparatus for cutting off corrugated fiberboard sheet in packing machine - Google Patents

Abstract

PURPOSE:To obtain a sheet cutter for sequentially cutting off stacked corrugated fiberboard sheets from an upper face to supply to a packing machine. CONSTITUTION:When corrugated fiberboard sheets 6 stacked on a pallet 7 are transferred to a lower position of a cutting arm 10 and a sheet upper face is detected by an upper face detecting sensor 11, the cutting arm 10 stops lowering, a needle 20 comes out to cut off a predetermined number of the sheets, and a hook 21 holds the cut sheets. Then when a final take-out B sensor 12 activates before the sensor 11 activates during lowering of the cutting arm 10, it continues to lower until a separately provided final take-out A sensor 13 activates, and when the sensor 13 activates the cutting arm 10 stops to have the sheet cut of. Finally, the sheets are cut off at an activation position of a final take-out sensor 14 with memory of cutting at a position of the final take-out A sensor 13 unconditionally.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet cutting device for cutting a pile of corrugated cardboard sheets sequentially from the upper surface thereof and supplying them to a packaging machine.

[0002]

2. Description of the Related Art A conventional device will be described with reference to FIGS. 1 to 3. A detaching arm 10 of a sheet detaching device 2 in which corrugated cardboard sheets 6 stacked on a pallet 7 are arranged so as to face the upper surface of the sheet. By driving the motor and lowering it onto the corrugated cardboard sheet 6, a fixed number of the corrugated cardboard sheets that have been stacked are separated by a needle and a hook provided in the device, and the separated corrugated cardboard sheets are held by the separating arm 10 and raised. The operation of moving the corrugated cardboard sheet held onto the sheet conveying device 3 is repeated, and the corrugated cardboard sheet is separated from the top in order.

As shown in FIG. 3, the separating arm 10 descends, and when the upper surface detecting sensor 11 attached to the arm detects the upper surface of the corrugated cardboard sheet 6, the separating arm 10
Stops descending and the upper surface detection sensor 11 of the arm 10
The needle 20 comes out from a position below the position to separate a certain number of corrugated cardboard sheets, and the hook 21 holds the separated sheets.

In this way, the separating arm 10 is gradually lowered to separate the corrugated board sheet 6 from the upper part, and at the time of the final separation, the separating work is completed at the position where the final take-out sensor 14 shown in FIG. 3 operates.

Therefore, the final number of separated sheets does not reach a fixed number.

[0006]

By the way, it is necessary to constantly supply a fixed number of corrugated cardboard sheets to a packaging machine. In the above-mentioned prior art, however, a pile of corrugated cardboard sheets is sequentially arranged from the upper side as shown in FIG. When cutting out, the final number of cuts will vary.

If the number of separated corrugated cardboard sheets is small, such as a few corrugated cardboard sheets, the corrugated cardboard sheets meander during the process of conveying the corrugated cardboard sheets to the packaging machine on the side of supply, which prevents normal conveyance.

Further, even if the corrugated board can be conveyed, the corrugated board sheets supplied to the packaging machine on the supplied side are few, so that the corrugated board sheets become insufficient by the time the corrugated board sheets on the next pallet 7 are supplied. There is a risk of waiting for the packaging machine.

The present invention solves each of these problems and ensures stable conveyance of corrugated cardboard sheets, and has high productivity.
It is an object of the present invention to provide a corrugated board sheet separating device that can obtain a packaging machine with good work efficiency.

[0010]

As a structure for achieving the above object, a corrugated board sheet separating device in a packaging machine according to the present invention comprises a corrugated board sheet piled on a pallet, which is moved up and down to separate the separating arm. Separate a fixed number of sheets from the top surface of the cardboard sheet detected by the top surface detection sensor with the needle and hook attached to
In the corrugated board sheet cutting device for feeding to the corrugated board sheet magazine in the next step, a distinguishing sensor that secures a certain number or more of the corrugated cardboard sheets on the pallet at the end is provided above the final take-out sensor. It is a thing.

[0011]

According to the corrugated board sheet separating device of the present invention having the above-described structure, the piled corrugated boards are separated in order from the top by the operation of the upper surface detecting sensor as in the prior art. Even if there is a variation in the number of separated sheets before separation, the discrimination sensor (Fig. 3
Since the final take-out B sensor 12) shown in is installed, it is possible to secure a fixed number of final cut-off sheets by the operation of the sensor 12.

If the final take-out B sensor 12 operates before the upper face detection sensor 11 operates, the operation of the upper face detection sensor is ignored and the detection of the final take-out A sensor 13 provided separately as shown in FIG. Separate with.

Further, after the final take-out A sensor 13 takes out, the final take-out sensor 14 separates.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall view of a corrugated board sheet feeding device according to an embodiment of the present invention, in which (a) is a plan view and (b) is a side view. 2 is a process explanatory view of the same device, FIG. 3 is a schematic plan view of a corrugated board sheet separating device, FIG. 4 is a flow chart in the case of the conventional device and the device of the present invention, FIG. ) Indicates the case of the device of the present invention.

In these figures, the corrugated cardboard sheets 6 are piled up on the pallet 7 and transferred by the actual pallet conveyor 4 to a position below the sheet separating device 2 together with the pallet.

As shown in FIG. 3, the sheet separating device 2 faces the upper surface of the corrugated cardboard sheet 6 and separates the separating arm 10.
Are provided in the horizontal direction, and the separating arm 1
No. 0 is a needle 20 that operates by facing the side of the corrugated cardboard sheet 6.
Also, the hook 21 is mounted so that it can be freely moved in and out. Reference numeral 22 is a cylinder device for rotating the hook 21.

Reference numeral 11 denotes a detaching arm 1 as in the conventional device.
An upper surface detection sensor attached to 0 detects the upper surface of the corrugated board sheet 6 by the sensor 11.

Reference numeral 12 denotes a final take-out B sensor newly provided in the present invention, and reference numeral 13 denotes a new finally take-out A sensor, which is arranged at a side surface position of the separating device. The sensor 12 is arranged above the sensor 13.

Reference numeral 14 denotes a final take-out sensor similar to the conventional apparatus, which is disposed below the sensors 12 and 13 as shown in FIG.

Final take-out A sensor 13, final take-out B
The sensor 12 is a sensor that operates when the detaching arm 10 descends like the final take-out sensor 14.

Next, the operation of this apparatus will be described with reference to FIGS. 4 and 3. FIG. 4B shows the method of the present invention.
(A) shows a conventional method. Cardboard sheet is pallet 7
When the sheets are piled up and transferred to the sheet separating device position, the separating arm 10 attached to the device descends.

If the upper surface detection sensor 11 operates before the final take-out B sensor 12 operates while the separating arm 10 is descending, the separating arm 10 stops at that point and performs the separating operation. In this case, c shown in FIG. 3 is the number of separated sheets.

Next, while the detaching arm 10 is descending, before the upper surface detecting sensor 11 operates, the final take-out B
When the sensor 12 operates, it continues descending until the final take-out A sensor 13 operates, and when the final take-out A sensor 13 operates, the detaching arm 10 stops and the detaching operation is performed. In this case, the number of separated sheets is the number shown in b of FIG. 3 at the minimum number and the total number of b and c in the figure at the maximum number.

Next, at the final time, the memory is separated at the position of the final take-out A sensor 13 to unconditionally disconnect at the operating position of the final take-out sensor 14. The number of separated sheets in this case is a shown in FIG.

FIG. 2 illustrates the steps of the corrugated board sheet feeder according to the present invention described in the above description of operation.
The required number of sheets are cut off from the upper surface of the sheet by the sheet separating device and transferred to the corrugated cardboard sheet magazine 8 by the sheet conveying device 3 shown in FIG. 1, and the empty pallet after the separation is similarly separated by the sheet conveying device 3 shown in FIG. The state of being transferred to the empty pallet storage device 5 installed in this case is shown. In addition, 9 shows the storage state of an empty pallet.

The sheet sent to the sheet dropping device 1 shown in FIG. 1 is dropped into the cardboard sheet magazine 8 as shown in FIG.

The part indicated by the alternate long and short dash line in the flow chart of the conventional system shown in FIG. 4 (a) shows the part controlled by the new system adopted in the present invention, and FIG. 4 (b) shows this part on an enlarged scale. It is a thing.

Although one embodiment of the present invention has been briefly described above, the present invention is not limited to the above embodiment, and various design changes can be made within the scope of the technical idea of the present invention. It belongs to the technical scope of the invention.

[0029]

As described above, the corrugated board sheet separating device in the packaging machine of the present invention has the following effects. (1) When the number of sheets to be cut off at the end is almost constant or more than the minimum number, the packaging machine on the side where the corrugated board is supplied until the next corrugated board on the pallet is supplied. It can be operated without stopping.

(2) Since the number of separated corrugated cardboard sheets does not decrease to about two or three, corrugated corrugated sheets are not meandered in the corrugated cardboard sheet conveying step, and the corrugated cardboard sheet conveyance is normally stabilized.

[Brief description of drawings]

FIG. 1 is an overall view of a corrugated board sheet feeder according to an embodiment of the present invention, in which (a) is a plan view and (b) is a side view.

FIG. 2 is a process explanatory diagram of the apparatus of FIG.

3 is a schematic side view of a corrugated board sheet separating device in the device of FIG.

FIG. 4 is a flow chart for comparing and explaining the operations of the conventional device and the device of the present invention.
(B) shows the case of the present invention.

[Explanation of symbols]

 1 sheet dropping device 2 sheet separating device 3 sheet conveying device 4 actual pallet conveyor 5 empty pallet storage device 6 corrugated cardboard sheet 7 pallet 8 corrugated cardboard sheet magazine 9 empty pallet storage 10 separation arm 11 upper surface detection sensor 12 final ejection B sensor 13 final ejection A Sensor 14 Final take-out sensor

Claims (1)

[Claims] 1. A corrugated cardboard sheet piled up on a pallet is moved up and down with a separating arm, and a fixed number of sheets are separated from the upper surface of the corrugated cardboard sheet detected by an upper surface detection sensor by a needle and a hook attached to the separating arm. In the corrugated cardboard sheet separating device for supplying to the corrugated cardboard sheet magazine, a packaging machine is provided above the final take-out sensor with a discrimination sensor that secures a certain number or more of the corrugated cardboard sheets on the pallet at the end. Corrugated sheet separating device in.