JP2021167030A - Cutting device - Google Patents

Abstract

To provide a cutting device which can speed up a tissue product manufacturing facility.SOLUTION: In a tissue product manufacturing facility, a cutting device CD is used for cutting a tissue product TP of a prescribed length from a continuously fed sheet laminate LS. The cutting device has a first cutting machine C1 arranged on an upstream side along a conveyor for conveying the sheet laminate LS and a second cutting machine C2 arranged on a downstream side. The first cutting machine C1 cuts in each twice length of the tissue product TP so as to obtain a twice length semi-product LP. The second cutting machine C2 cuts the twice length semi-product LP into a half length so as to obtain the tissue product TP of the prescribed length. Both of the first cutting machine C1 and the second cutting machine C2 minimize the number of cutting by reducing the number to half the number of tissue products TP to be manufactured and can follow a line speed even if the line speed is increased.SELECTED DRAWING: Figure 1

Description

The present invention relates to a cutting device. More specifically, it relates to a cutting device used in a tissue product manufacturing facility in which tissue paper is folded into multiple layers. The tissue paper referred to in the present specification includes tissue paper using dry thin paper made from wood pulp as a raw material, and wet tissue made mainly from a non-woven fabric and impregnated with various chemicals.

The schematic configuration of the tissue product manufacturing equipment will be described with reference to FIG. In the figure, (A) shows the main part of the equipment and includes the folding part I and the cutting part II. (B) shows a sheet supply unit III that supplies the raw sheet S to the folding unit I.
In the folding portion I, the strip-shaped sheet S is supplied to the folding plate device F, and is folded into a Z-shape or a W-shape (also referred to as a zigzag shape) by the built-in folding plate. A strip-shaped sheet S is unwound from the original rolls R1 and R2 of the sheet supply unit III shown in FIG. Two raw rolls (R1 and R2) are prepared, and when the amount of paper fed from one raw roll R1 is low, the tip of the sheet of the other raw roll R2 is pulled out and the sheet of the raw roll R1 is pulled out. Paper splicing is performed at the end of S. A paper splicing device JD is provided for this paper splicing. When the remaining amount of the original roll R2 becomes low, a new sheet of the original roll R1 is fed out to perform paper splicing, and this is repeated thereafter.

Several tens of units of the folding plate device F are arranged in series (only four units are shown in the figure). A sheet S is supplied to each of the individual folding plate devices F, and the sheets S are folded into a Z shape or a W shape. Then, the sheet S folded by the folded plate device F on the upstream side is sequentially stacked and meshed in a zigzag shape on the sheet S folded by the folded plate device F on the downstream side. This is a folding process, and usually dozens to hundreds of sheets are folded to obtain a sheet laminated body LS.
The folded long sheet laminate LS is cut to a predetermined length (about 10 cm to 30 cm) by a cutting machine C using a round blade or the like in the cutting portion II to obtain a tissue product TP.
After that, the tissue product TP is stored in a packaging container or a packaging bag and put on the market.

As the prior art of the cutting apparatus, there are those of Patent Documents 1 and 2. In all of the prior arts of Patent Documents 1 and 2, cutting is performed for each product size by using a cutting device such as a round blade. Since the product size is generally about 20 to 30 cm, the cutting must be completed while the sheet moves 20 to 30 cm, and the cutting of the next product must be started.

The cutting method of the prior art will be described with reference to FIG. 101 is a round blade, 102 is a seat retainer, and 103 is a moving bed. The round blade 101, the sheet retainer 102, and the moving bed 103 constitute a cutting device. On the other hand, there is a conveyor 110 that conveys the sheet laminated body LS. The conveyor 110 is a part of the conveyor 50 shown in FIG. 5, and exists downstream in the transport direction.
The sheet laminated body LS moves together with the moving bed 103, and the round blade 101 descends during this movement to cut the sheet laminated body LS. The sheet retainer 102 moves in synchronization with the round blade 101 to press the sheet laminate LS during cutting.

FIG. 3A shows the start of cutting, and the round blade 101 cuts into the sheet laminated body LS. Since the sheet laminate LS is fed by the moving bed 103, the round blade 101 moves at the same speed in the same direction as the transport direction of the moving bed 103, as shown in FIG. After cutting the sheet laminate LS, the round blade 101 rises away from the conveyor as shown in FIG. 3C. Then, as shown in FIG. 3D, the position returns to the original cutting start position.

The above cutting cycle is repeated every time one tissue product TP is cut. In this operation, the vertical motion and reciprocating motion of the round blade 101 are included in one cycle, and the speed of both the vertical motion and the reciprocating motion drops to 0 at the start point and the end point, and accelerates again in the next cycle. It consumes a lot of energy and has difficulty in speeding up.
Moreover, when the tissue paper is a wet tissue impregnated with a chemical solution, if the descent speed of the round blade 101 is increased, the impregnated chemical solution leaks from the wet tissue at the moment when the round blade 101 comes into contact with the wet tissue. A problem occurs. This is because the phenomenon that the wet tissue is compressed rather than cut occurs. In this case, it is not possible to obtain a wet tissue product that meets the quality.

For the above reasons, there is a limit to speeding up the production line in the tissue product manufacturing equipment, and the improvement in productivity has not been sufficient.

Japanese Unexamined Patent Publication No. 2016-112082 JP-A-2018-126541

In view of the above circumstances, an object of the present invention is to provide a cutting device capable of increasing the speed of a tissue product manufacturing facility.

The cutting device of the first invention is a cutting device for cutting a continuously sent sheet laminate into a tissue product having a predetermined length in a tissue product manufacturing facility, and is provided with a conveyor for transporting the sheet laminate. The first cutting machine is composed of a first cutting machine arranged on the upstream side of the conveyor and a second cutting machine arranged on the downstream side, and the first cutting machine is twice the product length of the tissue product. It is a cutting machine that cuts to a length to obtain a double-length semi-finished product, and the second cutting machine cuts the double-length semi-finished product to a half length to obtain a tissue product having a predetermined product length. It is characterized by being a cutting machine.
In the first invention, the cutting device of the second invention includes a slide table, a reciprocating drive source for the slide table, a vertical movement drive source for a round blade, and a controller. The controller has a function of controlling the sheet laminate being conveyed by moving the round blade moving portion up and down every twice the length of the product length of the tissue product and moving the slide table forward according to the conveying speed. It is characterized by having.
In the first invention, the cutting device of the third invention includes a slide table, a reciprocating drive source for the slide table, a vertical movement drive source for a round blade, and a controller. The controller is a double-length semi-finished product cut by the first cutting machine at a half-length position, a round blade cutting operation, a slide table forward operation according to a transport speed, and a round blade detaching operation. It is characterized by having a function of controlling the return operation of the slide table.

According to the first invention, the first cutting machine may be cut to a length twice the predetermined product length, so that the number of cuttings is half the number of tissue products to be manufactured. Since the second cutting machine also needs to cut the double-length and half-finished product in half, the number of cuttings is half the number of tissue products to be manufactured. If the number of cuts is halved, the number of ascending / descending and reciprocating cycles is also halved, so even if the line speed is increased, it can follow. Therefore, the productivity of the tissue product manufacturing equipment is improved.
According to the second invention, the sheet laminate being conveyed can be cut with a round blade every twice the length of the product, and this primary cutting operation can be repeated.
According to the third invention, the double-length semi-finished product cut by the first cutting machine can be cut with a round blade at a half-length position, and this secondary cutting operation can be repeated.

It is explanatory drawing of the cutting apparatus which concerns on one Embodiment of this invention. It is a front view of the 1st cutting machine C1. It is a side view of the 1st cutting machine C1. It is explanatory drawing of the cutting operation by the cutting device of FIG. It is explanatory drawing of the tissue product manufacturing equipment. It is explanatory drawing of the cutting operation by the cutting device of the prior art.

Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows the basic structure of the cutting device CD according to the present embodiment. The cutting device CD includes a first cutting machine C1 and a second cutting machine C2.
The first cutting machine C1 is installed along the first conveyor 51, and the second cutting machine C2 is installed along the second conveyor 52. The first conveyor 51 and the second conveyor 52 form a part of the outer conveyor 50 in the tissue product manufacturing equipment shown in FIG.

The first cutting machine C1 is a cutting machine that cuts every twice the length of a tissue product to obtain a double length semi-finished product LP, and the second cutting machine C2 cuts the double length semi-finished product LP by half. It is a cutting machine that cuts to a length (this is the product length) to obtain a tissue product TP of a predetermined length.

Here, the structure of the first cutting machine C1 will be described with reference to FIGS. 2 and 3.
11 is a fixed bed and 12 is a slide table. The slide table 12 is supported by a slide guide 13 fixed on the fixed bed 11 and is guided by a slide operation.
On the fixed bed 11, a rotary drive shaft 15 for rotating the round blade 1 is supported by two support bases 16 and bearings 17 attached to the upper ends thereof. A motor 18 is connected to one end of the rotary drive shaft 15. The motor 18 is supported on the fixed bed 11 by a support base 19.

The boss portion 21 for the round blade 1 is configured to be allowed to move in the axial direction on the rotary drive shaft 15 but to receive the rotary drive force. Such a configuration can be realized by, for example, an internal gear built in the boss portion 21 and a spline shaft meshing with the internal gear. Further, the boss portion 21 is provided with a pulley or the like that transmits the rotational force received from the rotational drive shaft 15 to the outside.

A boss portion 21 for the round blade 1 is fixed on the slide table 12 via a support base 22. An arm 23 is attached to the boss portion 21. A support shaft 25 of the round blade 1 is rotatably attached to the tip of the arm 23. A belt is wound around the support shaft 25 of the round blade 1 and the pulley or the like in the boss portion 21, and the rotational power of the rotary drive shaft 15 is transmitted to the round blade 1.

A rod of an elevating cylinder 26 composed of an air cylinder or the like is attached to the base end portion of the arm 23, and the cylinder body is fixed to the slide table 12.
With the above configuration, when the rotary drive shaft 15 is rotated by the motor 18, the round blade 1 is rotated, and when the elevating cylinder 26 is moved up and down, the arm 23 is swung to move the round blade 1 up and down.

A support conveyor 30 is attached to the slide table 12. The support conveyor 30 is a conveyor that forms a cutting space 31 for the round blade 1, and is provided with a roller 34 at the bottom of the cutting space 31 between the set of rollers 32 in the forward direction and the rollers 33 in the backward direction. A belt is wrapped around these rollers 32, 33, and 34 to support the tissue product TP being cut from below.

Paper retainers 38 are arranged before and after the round blade 1. The paper retainer 38 is configured to move up and down in synchronization with the round blade 1. The sheet laminate L3 being cut is pressed onto the support conveyor 30, and the shape is prevented from being deformed during cutting by the round blade 1.

When the slide table 12 moves, the round blade 1 also moves on the rotary drive shaft 15. In addition, the support conveyor 30 also moves with the movement of the slide table 12.
The moving distance of the slide table 12 and the support conveyor 30 is set to be twice the product length of the tissue product TP. This setting is realized by a controller configured by a computer or the like.

The second cutting machine C2 shown in FIG. 1 has the same structure and function as the first cutting machine C1 shown in FIGS. 2 and 3. Therefore, in FIGS. 1 and 4, the same members are designated by the same reference numerals. However, the moving distance between the slide table 12 and the support conveyor 30 in the second cutting machine C2 is set to the product length of the tissue product TP.

In the first cutting machine C1, the round blade 1 is moved up and down by a controller (not shown) every time the sheet laminated body LS being conveyed is twice as long as the tissue product TP, and the slide table 12 is moved according to the conveying speed. Controls the forward operation.
The second cutting machine C2 is a slide table 12 that matches the cutting operation and the conveying speed of the round blade 1 at the half length position of the double-length semi-finished product LP cut by the first cutting machine C1 by a controller (not shown). It has a function of controlling the forward operation, the detachment operation of the round blade 1, and the return operation of the slide table 12.

The cutting action of the cutting device CD of the present embodiment will be described with reference to FIG.
(1) Start of cutting As shown in FIG. 3A, the first cutting machine C1 starts cutting the sheet laminated body LS and cuts out a double-length semi-finished product LP. The second cutting machine C2 cuts the double-length semi-finished product LP to half the length. At this time, the paper presser 38 presses the sheet laminate LS, the double-length semi-finished product LP, and the tissue product TP.
(2) Synchronous advance As shown in FIG. 3B, both the first cutting machine C1 and the second cutting machine C2 advance in synchronization with the transport speed of the sheet laminated body LS. Specifically, the slide table 12 and the support conveyor 30 move forward. During this time, the cutting work is continuing.

(3) End of cutting When the cutting of the sheet laminate LS is completed by the first cutting machine C1 and the cutting of the double-length semi-finished product LP is completed by the second cutting machine C2, the round blades 1 of the respective cutting machines C1 and C2 are completed. , 1 retract upward. At this time, the paper retainer 38 is also retracted up and down. The tissue product TP cut to a predetermined product length is discharged from the second cutting machine C2.
(4) Synchronous retreat The round blades 1 and 1 of the first cutting machine C1 and the second cutting machine C2 retreat to the initial stage (cutting start position) with the movement of the support conveyor 30.

As described above, since the first cutting machine C1 may be cut to twice the length of the tissue product TP having a predetermined length, the number of cuttings can be half the number of the tissue product TP to be manufactured. Since the second cutting machine C2 also needs to cut the double-length semi-finished product LP in half, the number of cuttings is half the number of the tissue product TP to be manufactured. When the number of cuttings is halved in this way, the number of cycles of ascending / descending and reciprocating motion of the round blade 1 is also halved, so that it can follow even if the line speed is increased. Therefore, the productivity of the tissue product manufacturing equipment is improved.

The controller that controls the cutting operation of the first cutting machine C1 and the second cutting machine C2 controls the reciprocating operation of the slide table 12, and the reciprocating distance thereof can also be adjusted to be long or short. By adjusting this reciprocating distance, the product length of the tissue product TP can be easily changed. Generally, the product length of a tissue product is about 10 to 20 cm, but this product length can be changed by a simple operation using a touch panel or the like attached to the controller.

C1 1st cutting machine C2 2nd cutting machine 1 Round blade 15 Rotating drive shaft 18 Motor 11 Fixed bed 12 Slide table 13 Slide guide 21 Boss part 25 Support shaft 30 Support conveyor 31 Cut space LS sheet Laminated body LP Double length semi-finished product TP tissue products

The cutting device of the first invention is a cutting device for cutting a long sheet laminate continuously sent into a tissue product having a predetermined length in the long direction in a tissue product manufacturing facility. A conveyor for transporting the sheet laminate is provided, and the first cutting machine is composed of a first cutting machine arranged on the upstream side of the conveyor and a second cutting machine arranged on the downstream side. It is a cutting machine that cuts to twice the length of the product in the tissue product to obtain a double-length and half-finished product, and the second cutting machine is the double-length and half obtained by the first cutting machine. It is a cutting machine that cuts a product in half to obtain a tissue product having a predetermined product length.
In the first invention, the cutting device of the second invention includes a slide table, a reciprocating drive source for the slide table, a vertical movement drive source for a round blade, and a controller. The controller has a function of controlling the sheet laminate being conveyed by moving the round blade moving portion up and down every twice the length of the product length of the tissue product and moving the slide table forward according to the conveying speed. It is characterized by having.
In the first invention, the cutting device of the third invention includes a slide table, a reciprocating drive source for the slide table, a vertical movement drive source for a round blade, and a controller. The controller is a double-length semi-finished product cut by the first cutting machine at a half-length position, a round blade cutting operation, a slide table forward operation according to a transport speed, and a round blade detaching operation. It is characterized by having a function of controlling the return operation of the slide table.

Claims (3)

It is a cutting device for cutting out a tissue product of a predetermined length from a sheet laminate that is continuously sent in a tissue product manufacturing facility.
A conveyor for transporting the sheet laminate is provided, and includes a first cutting machine arranged on the upstream side of the conveyor and a second cutting machine arranged on the downstream side.
The first cutting machine is a cutting machine that cuts to twice the length of the product in the tissue product to obtain a half-length product.
The second cutting machine is a cutting machine for cutting the double-length semi-finished product to a half length to obtain a tissue product having a predetermined product length. The first cutting machine includes a slide table, a reciprocating drive source for the slide table, a vertical motion drive source for round blades, and a controller.
The controller has a function of controlling the sheet laminate being transported by moving the round blade moving portion up and down every twice the length of the product length of the tissue product and moving the slide table forward according to the transport speed. The cutting device according to claim 1, wherein the cutting device has. The second cutting machine includes a slide table, a reciprocating drive source for the slide table, a vertical motion drive source for round blades, and a controller.
The controller is used to cut a double-length semi-finished product cut by the first cutting machine at a half-length position with a round blade cutting operation, a slide table forward operation according to a transport speed, and a round blade detachment operation. The cutting device according to claim 1, further comprising a function of controlling the return operation of the slide table.

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