JP2565658Y2 - Web cutting device in web roll manufacturing machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a web roll manufacturing machine for manufacturing a web roll by winding a web fed from a raw roll by a predetermined length, and more particularly to such a web roll manufacturing machine. The present invention relates to a web cutting device for separating a web wound body in a manufacturing machine.

[0002]

2. Description of the Related Art Generally, a web roll manufacturing machine for manufacturing a web roll such as toilet paper forms a roll by winding a web fed from a raw roll by a predetermined length by a winding device. Moving the wound body from the winding position to the temporary receiving position while the web is continuous, and then cutting the web stretched between the winding position and the temporary receiving position by a cutting device. The web is cut off from the web to produce a web roll.
2. Description of the Related Art A web cutting apparatus used in a web roll manufacturing machine of this type generally employs a cutting method in which a web is cut by moving a blade from an upper retreat position to a cutting position. In such a blade cutting type web cutting apparatus, the web can be cut simultaneously over the entire width by moving the cutting blade down once.

[0003] In recent years, webs mixed with nylon fibers have become widespread in recent years with a view to improving the texture and the wet strength of the product, with the trend toward higher quality products. Such a web containing nylon fibers has good texture and water wet strength, but has a property that it is difficult to cut when the wound body is separated from the web.

[0004]

However, in the above-described conventional web-cutting apparatus of a web roll manufacturing machine, a vertical cutting type web-cutting apparatus needs to simultaneously cut the entire width of the web. Although a normal web made of pulp alone can be cut relatively easily, there is a problem that the web containing nylon fibers cannot be cut well as described above. Conventionally, when cutting such a web containing nylon fibers, there has been an example in which the blade is manually moved in the width direction of the web. At the same time, work efficiency decreases.

The present invention has been made in view of the above-mentioned conventional problems,
For example, it is an object of the present invention to provide a web cutting apparatus in a web roll manufacturing machine capable of automatically and reliably cutting even a web containing nylon fibers which is difficult to cut.

[0006]

The invention of claim 1 of the present application provides:
The web fed from the raw roll is wound up by a predetermined length by a winding device to form a wound body, and the wound body is moved from the winding position to the temporary receiving position while the web is continuous, and then Web cutting device in a web roll manufacturing machine in which a web stretched between a winding position and a temporary receiving position is cut by a cutting device to separate a wound body from the web and manufacture a web roll. A supporting table provided with a slit for moving a blade having a length extending over the entire width of the web and capable of supporting the web stretched between the winding position and the temporary receiving position from the lower surface thereof; A blade provided so as to be movable in the web width direction in the slit in a state protruding from the upper surface of the table, a blade driving device for moving the blade in the web width direction, and a web stretched on the receiving table for the slit. On both front and rear edges A pressing member having two pressing portions for pressing with an interval, and a pressing member driving device for moving the pressing member up and down between a web pressing position and an upper retreat position are provided, between the winding position and the temporary receiving position. It is characterized in that the web can be cut by moving the blade while the stretched web is pressed by each pressing portion of the pressing member.

[0007] The invention of claim 2 of the present application is based on claim 1 described above.
In the web cutting device in the web roll manufacturing machine according to the above, each pressing portion of the pressing member is formed of an elastic body that can be flexed in a direction close to and away from each other, and each pressing portion is directed outward in the front-rear direction. It is characterized by being formed in a state of being inclined downward.

[0008]

According to the web roll manufacturing machine of the present invention,
The wound body having taken up the web by a predetermined length at the winding position is moved from the winding position to the temporary receiving position, and the web is placed on a receiving table provided between the winding position and the temporary receiving position. Is installed. Next, the web cutting device is operated. First, the pressing member at the upper retreat position is moved downward by the pressing member driving device, and the two pressing portions of the pressing member straddle the slit of the receiving table back and forth. In each position the web is pressed onto the cradle. Subsequently, in this state, the blade driving device operates, and the blade moves in the web width direction in the slit, and cuts the web at the intermediate portion of the portion fixed by the two pressing portions over the entire width. . According to this web cutting apparatus, the cutting operation is performed smoothly because the blade is mechanically moved to cut the web in a state where the web is fixed by the two pressing portions of the pressing member.

Further, according to the web cutting device in the web roll manufacturing machine of the present invention, the two pressing portions of the pressing member are formed of an elastic body, and each of the pressing portions is directed outward in the front-rear direction. Since each pressing portion is pressed onto the receiving table via the web, each pressing portion is elastically deformed toward the outside, whereby the pressing portion is elastically deformed. The web between the pressing portions is tensioned in the front-rear direction. As described above, when the web at the cutting position is tensed in the front-rear direction, the web is not pushed by the blade when the blade is moved there, and the web does not bend, so that the cutting operation is performed more smoothly.

[0010]

According to the present invention, in a web cutting apparatus in a web roll manufacturing machine according to the present invention, a web fixed between two pressing portions is formed with a web width in a state where the web is pressed onto a receiving table by two pressing portions. Since the cutting is performed with a cutting tool running in the direction, the web can be easily cut, and for example, even a web containing nylon fibers can be cut smoothly, and the cutting action can be automatically performed. This has the effect.

Further, in the web cutting device in the web roll manufacturing machine according to the second aspect of the present invention, when each pressing portion of the pressing member presses the web onto the receiving table, each pressing portion is moved back and forth by its elastic action. By deforming outwardly, the web between the pressing portions can be strained back and forth, and the blade can cut the web in the strained state, so that the web can be more reliably cut. There is.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 to 5. The web roll manufacturing machine of this embodiment is a web feeding device 1 for feeding a web Q from a raw roll P. FIG.
And a winding device 3 for winding the fed web Q around the winding core S by a predetermined length, and supplying the winding cores S one by one to the web winding position A side of the winding device 3. And a winding body R formed by winding a web of a predetermined length around a winding core S at a web winding position A of the winding device 3 for discharging from the winding position A. Body discharging device 8 for
And a temporary receiving device 6 for temporarily holding the wound body R discharged from the winding position A, and web cutting for separating the wound body R held at the temporary receiving position B from the web Q. Device 4
It is comprised including.

The web feeding device 1 intermittently feeds a web Q from a web roll P by one unit length, and its start / stop operation is performed in conjunction with the winding device 3.

The take-up device 3 includes two take-up rolls (a first take-up roll 31 and a second take-up roll 32) that are rotated in the same direction in a state of being brought close to each other, and the two take-up rolls. A press roll 33 for pressing the wound body R formed between the winding rolls 31 and 32 from above, and a web winding position A formed between the three rolls (31, 32, 33).
, The web Q can be wound around the core S. The presser roll 33 is configured to be swung up and down by a cylinder (not shown), and is sequentially moved upward while pressing the upper surface side of the winding body R that is gradually winding at the winding position A, Further, after winding the web Q of a predetermined length at the winding position A (after the winding operation is stopped), the web Q is moved upward as shown by a chain line 33 'in FIG. The operation is performed so that the body R can be discharged. When the web leading end cut around the core S is wound, the presser roll 33 moves down to a position where it comes into contact with the upper surface of the core S as shown by a solid line in FIG.

The core supply device 2 supplies the cores S stocked on the core mounting table 21 to the position immediately before the winding position A one by one by the rotary drum 22 and the elevating device 23. Has become. The winding core S supplied to a position immediately before the winding position A is extruded to the winding position A by the wound body discharging device 8.

The wound body discharging device 8 uses a cylinder 81, and the cylinder 81 extends immediately after the web winding at the winding position A is completed, and stands by in front of the pusher 82. By extruding the core S, the core S
The wound body R at the winding position A is discharged from the winding position A via the. The wound body R discharged from the winding position A rolls to the temporary receiving device 6 via the receiving table 7 (described later) while the web Q is continuous. When the winding body R is discharged from the winding position A, the pressing roll 33 moves down immediately after that, and the next winding core S is pressed and held at the winding position A. Also, the pusher 82 of the cylinder 81
Is retracted to the rear evacuation position about the same time as pressing the core S supplied to the winding position A with the presser roll 33.

The temporary receiving device 6 is installed at a position appropriately spaced from the winding device 3. The temporary receiving devices 6 are arranged side by side at intervals such that the wound bodies R can be placed and held thereon.
It has two rolls (a first roll 61 and a second roll 62). The first and second rolls 61 and 62 are rotated at a low speed in the left rotation direction by the motor 63,
The wound body R placed on the temporary receiving device 6 is rotated in the web winding direction (right rotation direction). In a state where the web Q is continuous with the wound body R placed on the temporary receiving device 6, the web Q is tensioned between the winding position A and the temporary receiving position B, and the wound body R The web Q is rotated between the winding position A and the temporary receiving position B by the cutting device 4 without rotating.
When the web is cut, the wound body R is rotated so that the cut web end is wound around the wound body R.

Winding device 3 (winding position A) and temporary receiving device 6
The web cutting device 4 is provided between the (temporary receiving positions B). The web cutting device 4 includes a winding position A and a temporary receiving position B.
A receiving table 7 for supporting a web Q stretched between the receiving table 7 from the lower surface side thereof, a blade 41 provided on the lower surface side of the receiving table 7 so as to be movable in the web width direction, and And a web holding device 5 that presses and fixes a web Q stretched on the receiving table 7 above the receiving table 7.

A slit 71 is formed at an intermediate portion in the front-rear length direction of the receiving table 7 in a range longer than the entire width of the web Q stretched on the receiving table 7. The slit 71 has a narrow width of, for example, about 10 mm.

In this embodiment, a disk blade is used as the blade 41. The blade 41 is supported by a slider 43 guided by a guide rail 42. The guide rail 42 is installed in parallel with the slit 71 of the receiving table 7. The blade 41 is rotatably mounted on a side surface of a bracket 44 provided on the slider 43 with a shaft 45. The blade 41 is set in a state in which the blade 41 faces the inside of the slit 71 from the lower surface side of the receiving table 7 and the cutting edge slightly protrudes from the upper surface of the receiving table 7. Then, the blade 41 is attached to the slider 4
By reciprocating the member 3 along the guide rail 42, the member 3 can be reciprocated in the slit 71 of the receiving table 7.

In this embodiment, when the blade 41 reciprocates, the blade 41 is automatically rotated. That is, as shown in FIGS. 4 and 5, a roller 91 is attached concentrically to the blade 41, and the left and right sides of the bracket 44 are separate from the blade-side roller 91.
Two rollers 92, 93 are attached, and one end belt 94 having both ends 94a, 94a (FIG. 2) fixed to the body side plates 11, 11, respectively, is wound around the three rollers 91, 92, 93. I have. The end belt 94 extends in parallel with the guide rail 42. When the slider 43 moves along the guide rail 42, the blade-side roller 91 rotates due to the frictional force between the blade-side roller 91 and the belt 94, and the blade 41 is also rotated. That is, in FIG. 2, when the slider 43 moves from the right position to the left, the blade 41 moves while rotating clockwise. Conversely, when the slider 43 moves from the left to the right, the blade 41 moves while rotating left. I will be. .

In this embodiment, the blade driving device 47 employs a cylinder 48, and the slider 43 can be moved forward or backward with respect to the guide rail 42 by the expansion and contraction operation of the cylinder 48. In another embodiment, the blade driving device 47 may employ a driving method using, for example, a motor instead of the cylinder 48.

The web holding device 5 includes a pressing member 51 for holding the web Q stretched on the receiving table 7 and a pressing member driving device 57 for moving the pressing member 51 up and down.

The pressing member 51 has a horizontally long elastic body 53 made of rubber or the like attached to the lower surface of a horizontally long reinforcing member 52. The elastic body 53 has a length slightly longer than the web width. On the lower surface side of the elastic body 53, two (two) pressing portions 55, 55 projecting downward in a bifurcated manner with a space portion 54 in the center portion are integrally formed. The interval between the pressing portions 55, 55 is the width of the slit 71 (10 mm).
) (For example, about 50 mm). Further, the pressing portions 55, 55 can be bent in the directions of approaching / separating from each other. Further, each pressing portion 5
5, 55 are formed in a state where they are inclined downward toward the front and rear outer sides, respectively. In other words, each of the pressing portions 55 has a shape that opens downward.

The pressing member driving device 57 has a pair of left and right cylinders 58,58. These cylinders 58, 5
Numeral 8 supports and fixes each end of the pressing member 51 (each end of the reinforcing member 52) in a vertically oriented state. When the cylinders 58, 58 are in the contracted state, the pressing members 51
Is lifted to the upper retreat position (the position shown by the solid line in FIGS. 1 and 2), and when the cylinders 58, 58 are in the extended state, the pressing members 51 push the pressing members 55, 55 into the slits 7 of the receiving base 7.
1 can be moved down to the position where the web Q on the receiving table 7 is pressed (the position shown in FIGS. 3 and 4) at the position straddling back and forth. In a state where the pressing member 51 is lifted to the upper retreat position, a space is formed between the lower surface of the pressing member 51 and the upper surface of the receiving table 7 so as to allow the web winding body R to pass therethrough. It has become.

The above-described web cutting device 4 operates as follows. First, during the web winding operation at the winding position A, the pressing member 51 is at the upwardly retracted position as shown in FIGS. When the web winding operation is completed, the wound body R formed at the winding position A is moved to the temporary receiving position B by the wound body discharging device 8 while the web is continuous. In this state, the web Q is stretched on the cradle 7. Subsequently, the pressing member 51 is moved downward, and the web Q is pressed onto the receiving table 7 at a position where each pressing portion 55, 55 straddles the slit 71 back and forth.
At this time, the pressing portions 55, 55 act to tension the web Q between the pressing portions 55, 55 back and forth by their elasticity, and press the web at the cutting position in a tensioned state.・ Become fixed. That is, each pressing portion 5
4, when they are simply brought into contact with the web Q, they are in the state of chain lines 55 ', 55' in FIG. 4, but when they are further pushed down, the pressing parts 55, 55 expand outward to the state shown by the solid lines, respectively. And then the two pressing portions 5
The web between 5 and 55 is pushed back and forth and fixed in that state. Then, the blade 41 is moved in the web width direction while rotating, and the web Q in the tension state on the slit 71 is cut by the blade 41. In this manner, when the web Q is cut and tensioned and fixed by the pressing member 51 and the cutting tool 41 is moved to cut the web Q smoothly and reliably, for example, even a web containing nylon fibers. be able to.

When the web Q is cut between the winding position A and the temporary receiving position B, each of the rolls 61, 6 of the temporary receiving device 6 is cut.
As the 2 rotates, the web cut end on the winding body side is wound around the outer circumference of the winding body R.

The cut web end on the raw roll side is wound at a winding position A by an end winding device (not shown).
Is wound around the outer periphery of the next winding core S which is waiting at the next time, and subsequently, the respective rolls (both winding rolls 31 and 32 and the presser roll 33) of the winding device 3 are driven to take up the next web winding. Work is performed.

The web roll placed on the temporary receiving device 6 is moved from the temporary receiving device 6 to the next process side by moving the first roll 61 upward as indicated by reference numeral 61 'in FIG. Is discharged.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a web roll manufacturing machine provided with a web cutting device according to an embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrows II-II in FIG.

FIG. 3 is a partial state change diagram of FIG. 1;

FIG. 4 is a partially enlarged view of FIG. 3;

FIG. 5 is a sectional view taken along line VV of FIG. 4;

[Explanation of symbols]

3 is a winding device, 4 is a cutting device, 5 is a web holding device, 6
Is a temporary receiving device, 7 is a receiving stand, 41 is a blade, 47 is a blade driving device, 51 is a pressing member, 55 is a pressing portion, 57 is a pressing member driving device, 71 is a slit, A is a winding position, and B is a temporary winding position. The receiving position, P is a raw material roll, Q is a web, and R is a wound body.

Claims (2)

(57) [Scope of request for utility model registration] 1. A web (Q) unwound from a web roll (P) is wound by a winding device (3) by a predetermined length to form a roll (R), and the roll (R) is formed. ) Is moved from the winding position (A) to the temporary receiving position (B) while the web (Q) is continuous, and then tension is applied between the winding position (A) and the temporary receiving position (B). In a web roll manufacturing machine, a web (Q) provided is cut by a cutting device (4) to separate a wound body (R) from the web (Q) to manufacture a web roll. Position (A)
(Q) stretched between the temporary receiving position (B)
(7) provided with a slit (71) for moving the blade, which can support the blade from the lower surface side thereof and has a length over the entire width of the web (Q), and the cutting edge protrudes from the upper surface of the tray (7). A blade (41) provided so as to be movable in the web width direction in the slit (71) in a state in which the blade is driven, a blade driving device (47) for moving the blade (41) in the web width direction, and the pedestal ( 7) Pressing the web (Q) stretched on the front and rear edges of the slit (71) at an interval.
Pressing member (51) having two pressing portions (55, 55)
And a pressing member driving device (57) for moving the pressing member (51) up and down between a web pressing position and an upward retreat position, wherein the winding position (A) and the temporary receiving position (B) are provided. The web (Q) can be cut by moving the blade (41) in a state where the web (Q) stretched between the pressing members (51, 55) of the pressing member (51) is pressed. A web cutting device in a web roll manufacturing machine, characterized in that: 2. The configuration of the invention according to claim 1, wherein each of the pressing portions (55, 55) of the pressing member (51) is formed of an elastic body that can be flexed in a direction of approaching / separating from each other.
The web cutting device in a web roll manufacturing machine, wherein each of the pressing portions (55, 55) is formed to be inclined downward toward the outside in the front-rear direction.