JPH05116820A - Separated web tail end edge retainer for web winding apparatus - Google Patents

Abstract

PURPOSE:To enable retaining a web tail end edge, separated without using a vacuum device, on the surface of a main take-up drum over a prescribed section thereof, and improve the quality of a take-up product, by arranging a large number of hooks used to hook the web tail end edge, in a groove of the surface of the main take-up drum. CONSTITUTION:At a selected point of time during synchronous rotation of a main take-up drum 5 to a web separation roll 10, a web separator 11 is caused to rush into a groove 12, and a web 1 is torn and separated by a rigid member 13. Within the groove 12, hooks 22 are so mounted that their tooth edges may project into it. The tooth edges of the hooks 22 are so arranged as to direct in a reverse direction to the rotational direction of the main take-up drum 5. Accordingly, a tail end edge 1b of the separated web 1 is retained in a condition of being engaged on a large number of hooks 22 by a pulling force having theretofore acted on the web 1. When the main take-up drum 5 is further rotated by a suitable amount, the tail end edge 1b is disengaged by receiving a force causing the tail end edge to be disengaged from the hooks 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for holding separated web tail ends in a web winding device.

[0002]

2. Description of the Related Art A web winding device for winding a web into a small roll from a large roll of a sheet material such as paper is used, for example, to cut a long web into a desired length. Publication No. 49-41543 and Japanese Patent Publication 1-2218
It is equipped with a web separation (cutting) device as seen in Japanese Patent Publication No. 6 and the like.

All of these web winding devices rotate synchronously as shown in FIGS. 9 and 10 (this drawing is in accordance with the drawing of Japanese Patent Publication No. 1-21886). Main winding drum 35 operatively connected to each other
And a web separating roll 40, and a groove 42 is formed on the surface of the main winding drum 35.
40 has a web separator 41 protruding from its surface such that the groove 42 and the web separator 41 separate the web at a selected point in the synchronous rotation of the main take-up drum 35 and the web separating roll 40. The device 41 is formed on the main take-up drum 35 and the web separating roll 40 so as to project into the groove 42. The web separating device 41 is a rigid member for pushing the web 31 into the groove 42. Having a member 43, the web separator 41 is configured such that when the rigid member 43 penetrates the groove 42, the groove 31 is separated by a distance beyond which the web 31 stretches and stretches the web. Is configured to plunge into and tear the web 31 in the groove 42.

However, in the web take-up device having such a web separating device, as soon as the tip end 31a and the tail end 31b of the separated (cut) web 31 are cut, they are wound up until now. Ita main winding drum 35
Once separated from the surface of the web and free, the tip end 31a of the separated web cannot be moved to a position where it comes into contact with the core for the next winding, and the tail end 31b of the separated web 31. Therefore, it is impossible to keep the core 38, which has the adhesive applied on its surface, from coming into contact with the core 38.

Therefore, in any of the conventional devices as described above, a vacuum device is attached to the main winding drum 35, and even after the separation of the web 31 occurs with the vacuum device, Near the groove 42, both the leading end 31a and the tail end 31b of the web are held on the main winding drum 35 of a predetermined rotation section.

That is, the main winding drum 35 is arranged on the front and rear sides of the groove 42 in the direction of rotation thereof, and a slight space is maintained between the groove 42 and the surface of the main winding drum 35. The suction ports 46 and 50 that are opened are provided, and in these conventional devices, the tip of the separated web is
By sucking 31a and the tail edge 31b respectively into these suction ports 46 and 50, the main winding drum of a predetermined rotation section can be obtained.
It is designed to be held on the surface of 35, and for the tail edge 31b of the separated web, the main take-up drum so that it does not come into contact with the core 38 whose surface is coated with adhesive. It is designed to be held on the surface of 35.

[0007]

In the conventional apparatus, the tail edge 31 of the web separated by the vacuum apparatus as described above is used.
The b is kept in contact with the surface of the main winding drum 35 until it passes the predetermined position, and the tip end 31a of the separated web is also kept in the predetermined position. The main winding drum 35, which is a rotating body, does not rotate as shown in FIGS. 9 and 10 in order to hold it on the surface of the main winding drum 35 until it reaches and to release them at predetermined positions. Two partition walls that are fixed bodies
The vacuum chamber 35 that is always passed through the vacuum source with 51/52
And the atmosphere chamber 54 which is not connected to the vacuum source. The suction ports 46 and 50 are adapted to stop the suction action of the web by the vacuum at the positions of the partition walls 51 and 52. However, such a configuration is such that the vast interior of the main winding drum 35, which is a rotating body, is fixed and held so as not to rotate and its end portion is against the inner peripheral surface of the main winding drum 35. Since it must be divided into two chambers by the partition walls 51 and 52 that are in airtight sliding contact with each other, the configuration becomes large.

However, the disadvantages described above are, for example, that a vacuum chamber is formed in the main winding drum 35 by a partition wall fixed to the drum 35, and the suction ports 46 and 50 are opened to the vacuum chamber. And the main vacuum drum of the vacuum chamber.
If it is configured so that it can be connected to the vacuum source only in a certain rotation section via a valve plate (like a timing plate of an axial piston swash plate type hydraulic motor) arranged on the side surface of 35, that can be solved. However, in that case, unless two vacuum chambers that rotate integrally with the main winding drum 35 are formed, in this case, two suction ports 46 having different phases are provided. It is not possible to configure 50 so that the main winding drum 35 can be released from the vacuum source at a predetermined rotation phase.

Moreover, such a vacuum device has a problem that a large power cost is originally required, and that it is a noise source due to the high noise of the vacuum air. However, there is a problem that the suction port 50 must be cleaned because the suction port 50 with which the tail end 31b contacts does not easily collect paper.

Therefore, according to the present invention, in order to eliminate the above-mentioned disadvantages of the vacuum device, the tail side of the separated web is wound up in a predetermined rotation section without using the vacuum device. It is an object of the present invention to provide a novel web end holding device that can be held on the surface of a drum and that is suitable for high speed operation and that can improve the quality of the wound product.

[0011]

The technical means taken by the present invention to solve the above problems lies in that the separated web tail holding device in the web winding device is constructed as follows. .. That is, the present invention will be described with reference to the drawings. The main winding drum 5 and the web separating roll 10 are operatively connected to each other so as to rotate synchronously, and the surface of the main winding drum 5 is described. The groove 12 is formed in, the web separation roll 10 has a web separator 11 protruding from its surface, the groove 12 and the web separator 11,
The main take-up drum 5 and the web separating roll 10 are arranged so that the web separator 11 plunges into the groove 12 at a selected point in the synchronous rotation of the main take-up drum 5 and the web separating roll 10.
The web separator 11 has a rigid member 13 for pushing the web 1 into the groove 12, and the web separator 11 has the rigid member 13 in the groove. A web take-up device configured to push the web 1 into the groove 12 for a distance exceeding the stretch and tensile limits of the web when the web 1 is rushed into the groove 12 and tear the web 1 in the groove 12. In the case where the separation of the web 1 occurs, means for holding the tail edge 1b of the separated web in the groove 12 in contact with the surface of the main winding drum 5 is
A large number of hooks mounted on the surface of the main winding drum, characterized in that the tips of the hooks are arranged in parallel in the groove.

[0012]

The web tail edge holding device constructed as described above is the main winding drum 5 which constitutes the web winding device.
When the web separator 11 is thrust into the groove 12 at a selected point in the synchronous rotation of the web separator roll 10 and the web separator roll 10, when the rigid member 13 of the web separator 11 thrusts into the groove 12 (see FIGS. 5 and 6), The web 1 is thrust into the groove 12 by a distance exceeding the stretch and tension limits of the web, and is separated in the groove 12 by the rigid member 13 of the web separator 11 so as to be torn. However, in the web winding device according to the present invention, the hook 22 is attached so that the tooth tip projects into the groove 12, and the tooth tip of the hook 22 rotates the main winding drum 5. Since the webs 11 are juxtaposed into the groove 12 by the rigid member 13 of the web separator 11 as described above, the webs 1 are arranged side by side in a rearward direction. Until it is separated (Fig. , The Oen of the web 1,
The tip of the hook 22 is pressed against the tip of the hook 22, and the tip of the hook 22 is forced into the web 1.
At the time of separation by 11 (FIG. 6), the tail edge 1b of the separated web 1 is divided into a large number of pieces by the above-mentioned pulling (tension) acting on the web 1 on the tail edge 1b side. It is caught on the hook 22. Therefore, the tail end 1b of the web 1 does not come into contact with the winding core 8 whose surface is coated with the adhesive, and the main winding drum 5
It is possible to pass between the main winding drum 5 and the winding core 8 while being held on the surface of (1) (FIG. 7). In this way, the tail edge 1b of the web 1 that has passed between the main winding drum 5 and the winding core 8 without contacting the winding core 8 is such that the web 1 rotates in the direction opposite to the main winding drum 5. Winding core 8
Since the tail edge 1b of the web 1 moves away from the main take-up drum 5 when the main take-up drum 5 has further rotated by an appropriate amount, the tail edge of the web 1 moves from the hook 22. The hook 22 is detached from the hook 22 when it receives a force in the direction to pull it out.

[0013]

EXAMPLE An example will be described with reference to FIGS.
The web winding device shown in FIGS. 1 and 2 has a web 1 that has passed between the perforation roll 2 and the anvil roll 3.
Is wound around the main winding drum 5 via the field roll 4, and the leading end of the web 1 passing through the main winding drum 5 passes between the main winding drum 5 and the sub winding drum 6 to wind up the winding space. The winding space 7 composed of the two winding drums 5 and 6 and the nip roll 9 is attached to the winding core 8 fed into
In the above, the tape is wound up to a log having a desired thickness.

The perforation roll 2 and the anvil roll 3 arranged in front of the feed roll 4 described above.
In the perforation forming apparatus, the perforation can be formed at equal intervals on the web 1 when the anvil roll 3 is brought close to the illustrated working position.
When the anvil roll 3 is separated from the perforation roll 2 to the inoperative position (not shown), the perforation is not formed on the web 1. When the log is rolled up to a desired thickness, the web 1 is separated (cut) by the web separator 11 of the web separating roll 10 which is provided opposite to the main winding drum 5. There is.

That is, on the surface of the main winding drum 5,
A groove 12 is formed along the normal direction of the drum 5,
A web separator 11 having a cutter blade 13 along the normal direction of the roll 10 is attached to the surface of the web separating roll 10 and is rotated in synchronization with the main take-up drum 5. When the roll is displaced in the direction of approaching the main winding drum 5 in the phase shown in FIG. 1, the above-mentioned cutter blade 13 (FIG. 2) having a sawtooth-shaped cutting edge is formed in the groove 12 as shown in FIGS. The web 1 that has rushed in and is wound around the surface of the main winding drum 5 is
Of the cutter blade 13 is pushed into the groove 12 by a distance exceeding the stretching and pulling limits, and is cut by the cutting edge of the cutter blade 13 in the groove 12. In FIGS. 2, 5, and 6, 14 is a web separating roll 10.
On the base of the web separator 11 attached to the surface of the cutter blade 13, the cutter blade 13 is detachably attached to the base 14, and the base 14 is placed at a position where the cutter blade 13 is sandwiched, A pair of web holders made of rubber pipes
15 and 15 are installed.

On the surface 5a of the main winding drum 5, even after the separation (cutting) of the web 1 by the web separator 11 has occurred, the vicinity of the tip 12a of the web 1 and the groove 12 are formed. In order to be held on the main winding drum 5, the main winding drum 1 is arranged on the rear side of the groove 12 in the rotation direction thereof and with a slight distance from the groove 12, A large number of rows of suction holes 16 opened on the surface 5a of the main winding drum 1 are formed, and the rows of the suction holes 16 are ducts made of square pipes attached to the inner surface 5b of the main winding drum 5. The main winding drum 5 is connected to a vacuum source (not shown) only via a timing plate (valve plate) 17 (not shown) while the main winding drum 5 is in a predetermined rotation phase.

In FIG. 2, 18 is the suction hole 16 described above.
Is a suction groove connecting the rows of the main winding drum 5 on the surface 1a of the main winding drum 5, and 19 is the surface of the main winding drum 5 between the groove 12 and the suction groove 17 after separation of the web 1 has occurred. Next, when 5a comes into contact with the winding core 8 for winding the leading edge of the web 1, the adhesive applied in stripes along the circumferential direction on the surface of the winding core 8 is exposed. The surface of the main winding drum 5 so as not to be transferred onto the surface 5a of the winding drum 5.
5a is a groove formed in the circumferential direction. Then, even after the separation (cutting) of the web 1 by the web separator 11 occurs on the surface 5a of the main winding drum 5, the tail edge 1b of the web 1 is formed and held in the groove 12. Therefore, Fig. 3 ・ 4
A hook blade 20 as shown in FIG. 1 is arranged on the surface of the main winding drum 5. That is, along the front edge 12a of the groove 12, a recess 21 continuing from the groove 5 is formed on the surface 5a of the main winding drum 5, and the hook blade 20 is attached to the recess 21. However, the surface of the hook blade 20 of this embodiment is the main winding drum 5.
Is formed on an arcuate surface having the same diameter as that of the surface 5a, and one side line 28 is formed on the inside of this arc, and one side edge 20 in the longitudinal direction thereof is formed.
b is formed into a sharp blade, and a large number of hooks 22 are arranged in parallel on the side edge 20b with a large number of U-shaped grooves 23 formed on the back surface of the hook blade 20. Is formed in a closed state.

The hook blade 20 has a surface
The hook blade 20a is mounted on the recess 21 with the surface 20a flush with the surface 5 of the main winding drum 5.
Is arranged with respect to the main winding drum 5 such that the hooks 22 or the tooth tips thereof project into the groove 12, and the tooth tips of the hooks 22 face rearward in the rotation direction of the main winding drum 5. Are arranged in parallel with each other and attached to the main winding drum 5. In addition, in FIGS.
Reference numeral 24 denotes a screw hole for attaching the hook blade 20 to the main winding drum 5, and the hook bouredo 20 is provided in the recess 21 of the main winding drum 5 with a screw 25 inserted into the screw hole 24. Installed.

Since the web tail holding device of this embodiment has the above-mentioned structure, the cutter blade which is a rigid member of the web separator 11 has already been described in the section of the operation.
When 13 enters into the groove 12 of the main winding drum 5, as shown in FIG.
As shown in FIG. 2, the web 1 is thrust into the groove 12 and separated (cut) in the groove 12. However, the web 1 is placed at a position where the cutter blade 13 of the separator is sandwiched. Since the pair of web retainers 15 and 15 as described above are attached, the web 1 is pressed by the pair of web retainers 15 and 15 in front of and behind the portion bridged in the groove 12. In this state, the portion to be the tail edge 1b of the web 1 at this time is pushed into the groove 12, and the portion in contact with the hook 22 is the hook.
It will be strongly pressed against 22 and hook 22
It is supposed to be hooked against.

Next, another embodiment will be described with reference to FIG. In the above-described embodiment, the hook blade 20 is fixed near the groove 12 and only the hook 22 corresponding to the holding means is located in the groove 12, but as shown in FIG. The 20 itself may be inserted into the groove 12 (in this case, the hook 22 naturally goes into the groove) and fixed to the side wall of the groove 12 with the screw 25.

[0021]

The web tail edge holding device of the present invention has the following effects. Without using a vacuum device such as a conventional device, only the separating pressure applied to the web of the web separator is used to hook the tail edge of the separated web on the hook, and the action of this hook alone causes the web to move. Since the tail edge can be held on the surface of the main winding drum of the desired rotation section, the power for the vacuum device which the conventional apparatus required for the web edge holding device is required. The cost can be eliminated, and the noise generated from the vacuum device can be eliminated. Since no vacuum is used, the maintenance is easy in that it does not require the trouble of frequently cleaning the paper dust accumulated in the suction holes of the tail edge of the web as in the conventional apparatus. The holding by the vacuum device may come off due to the centrifugal force during high-speed rotation (especially in the case of toilet paper, the suction force is weak because there are many paper gaps). Since the edge is held, the holding force is strong and the web winding device can be operated at a higher speed. Since the holding device of the present invention utilizes the hooking action of the hook, it does not require power and has a large energy saving effect. Since the tail end of the web, and also the end of the web is held, the appearance of the finished web (for example, the appearance of toilet paper as a product) can be rolled up to the end and the product value is improved. Since the end of the web is held to the end, the tail edge of the web does not touch the adhesive on the outer circumference of the core. When it is rolled up as a product, it will be a toilet paper, and the tail seal will be slightly inside from the end. However, since the portion past the tail-sealed portion does not adhere to the lower layer paper, it can be easily drawn out at the beginning of use. Since the tail end is held in the groove, it does not block the wind during rotation, and it is difficult to hold it, so it is suitable for high-speed rotation.

[Brief description of drawings]

FIG. 1 is a side view schematically showing a web winding device.

FIG. 2 is a vertical cross-sectional side view showing a waist portion of a web separating device and a web tail edge holding device.

FIG. 3 is a rear view of the hook blade.

4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is an operation explanatory view showing the operation of the web cutting device and the web tail edge holding device over time.

FIG. 6 is an operation explanatory view showing the operation of the web cutting device and the web tail edge holding device over time.

FIG. 7 is an operation explanatory view showing the operation of the web cutting device and the web tail edge holding device over time.

FIG. 8 is a side view showing another embodiment of the web trailing edge holding device.

FIG. 9 is an operation explanatory view showing the operation of the conventional holding device for the tail end of the web over time.

FIG. 10 is an operation explanatory view showing the operation of a conventional web tail end holding device over time.

[Explanation of symbols]

 1 web 1b web tail 5 main winding drum 8 core 10 web separation roll 11 web separator 12 groove 13 cutter blade (rigid member) 20 hook blade 22 hook

Claims (1)

[Claims] 1. A main take-up drum and a web separating roll, which are operatively connected to each other so as to rotate synchronously, wherein a groove is formed on the surface of the main take-up drum, and the web separating roll is Having a web separator protruding from the surface,
The groove and the web separator are arranged on the main take-up drum and the web separation roll so that the web separator plunges into the groove at a selected point in the synchronous rotation of the main take-up drum and the web separation roll. And the web separator has a rigid member that pushes the web into the groove such that the web separator stretches and pulls the web when the rigid member enters the groove. A web take-up device configured to be pushed into the groove for a distance exceeding the limit of and to tear the web in the groove after the separation of the web has occurred. The means for holding the end in contact with the surface of the main take-up drum in the groove is a number of hooks mounted on the surface of the main take-up drum, the tips of which are mentioned above. groove Web tail end of the holding device which is separated in a web winding apparatus characterized by being parallel arranged in.