JPS61267655A - Web end detecting device for winding roll - Google Patents

Abstract

PURPOSE:To detect the end of a web of a winding roll, by opposing a pair of contact elements at the periphery of the winding roll, and furnishing a detector to detect the relative displacement between the contact elements. CONSTITUTION:The end of a web WE first passes a roller 1L of the contact rollers 1L and 1R, that is, the web end WE passes the position of the roller 1L, and comes between the rollers 1L and 1R. Therefore, at the beginning, only the roller 1L and a vertical rod 3L go down, but the roller 1R and a vertical rod 3R don't. Consequently, the rollers 1L and 1R, and, the rods 3L and 3R are displaced relatively, and, a limit switch 7 of the rod 3L contacts the tip of the rod 3R. In that, the switch 7 acts and the relative displacement of the rollers 1L and 1R can be detected. Therefore, the web end WE of the winding roller R can be detected by he switch 7.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a web end detection device for a take-up roll.

Structures of conventional examples and their problems For example, a slitter that shreds a continuous web such as paper into a plurality of strips and winds the shredded web onto a take-up roll is generally used. In the case of this slitter, normally
Once the web has been wound, tape is applied to the ends of the web to prevent the continuous web from unwinding from the take-up roll. The ends of the web of the take-up roll may also be treated in other ways.

In winding machines such as this type of slitter, it has recently been desired to automate the processing of the end of the web of the winding roll. However, to automate the processing of the web end, it is necessary to detect the web end of the take-up roll. Conventionally, the end of the web on the take-up roll could not be detected, and the process could not be automated. Currently, each time the web is wound, the end of the web is manually wrapped.

OBJECT OF THE INVENTION Accordingly, the present invention has been made for the purpose of detecting the end of a web on a take-up roll.

Structure of the Invention According to the present invention, a pair of contacts are arranged opposite to each other on the outer circumferential surface of a take-up roll, and each contact is arranged at intervals in the circumferential direction of the take-up roll. Further, each contact is movably guided toward the outer peripheral surface of the take-up roll, and each contact is brought into contact with the outer peripheral surface of the take-up roll by its own weight or elastic means. The present invention is characterized in that a detector is provided between each contact to detect the relative displacement between the two, and the end of the web of the take-up roll is detected by this detector.

Description of examples Embodiments of the present invention will be described below with reference to the drawings.

In the figure, the take-up roll (R) is a continuous web of paper or the like, which has an end (WE) of the web, and a surface-driven roller to allow rotation around an axis (C). It is supported by a rotary drive mechanism.

This device has a contactor that contacts the outer peripheral surface of the take-up roll (R). The contact element is a pair of left and right contact rollers (IL), (
IR) and a contact roller (IL).

(IR) are arranged above the take-up roll (R) so as to face the outer circumferential surface of the take-up roll (R), and are arranged at intervals in the circumferential direction of the take-up roll (R). Furthermore, a contact roller (IL),
A pair of left and right presser rollers (2L), (2
R) and a presser roller (2L).

(2R) is also arranged above the take-up roll (R) so as to face its outer peripheral surface.

The contact rollers (IL), (IR) are connected to a pair of vertical rods (3
L) and (3R), and the axis of the take-up roll (R) (
It is rotatably guided around an axis (C5) parallel to C). Also, vertical rods (3L), (3R) are inserted into bearings (5) in the holes of the carriage (4) and guided so as to be able to rise and fall, contact rollers (lL), (lR
) is movably guided toward the outer peripheral surface of the take-up roll (R). Vertical rod (3L).

(3R) has a stopper (6) that limits its descent. Furthermore, a limit switch (7) is used as a detector to detect the relative displacement of the contact rollers (IL), (IR), and the limit switch (7) is connected to the right vertical rod (3).
R) and is fixed to the left vertical rod (3L). Presser roller (2L), (2
R) is supported directly on the carriage (4), and the take-up roll (R
) is rotatably guided around an axis (C2) parallel to the axis (C) of

Furthermore, the device has a cylinder (8) for raising and lowering the carriage (4). The cylinder (8) and the carriage (4) are connected to each other by the bottle (9). The bin (9) has a take-up roll (R) and a contact roller (IL).
), (lR) and presser roller (2L).

The carriage (4) extends parallel to the axes (C), (C,), (C,) of (2R) and is swingably guided around the bin (9). Also, the bottle (9) is attached to a contact roller (lL
), (lR> and a contact roller (I L) located on the intermediate surface (Y) of the presser rollers (2L), (2R).

(IR) and presser rollers (2L), (2R) are on the surface (Y
) are arranged symmetrically on both sides. Vertical rod (3L
), (3R) are arranged parallel to the intermediate plane (Y).

In the device configured as described above, the cylinder (8)
When the carriage (4) is lowered by
2L) and (2R) move integrally with the carriage (4),
It descends toward the outer peripheral surface of the take-up roll (R). Also,
Before lowering the carriage (4), vertical rod (3, (3R)
The contact rollers (IL) and (IR) are pulled down by their own weight, and the stoppers (6) of the vertical rods (3L) and (3R) are pulled down by the carriage (4).
) is engaged with. Therefore, when the carriage (4) and presser rollers (2L), (2R) descend, the contact rollers (IL), (IR) also move together with the carriage (4), and the outer peripheral surface of the take-up roll (R) descend towards.

First, the contact rollers (IL) and (IR) come into contact with the outer peripheral surface of the take-up roll (R). Then the carriage (4
) and presser rollers (2L) and (2R) are lowered,
Contact rollers (LL), (IR) and vertical rods (3L
), (3R> are not lowered. Therefore, as shown, the stoppers (3R) of the vertical rods (3L), (3R)
6) is separated from the carriage (4) and the vertical rod (3L),
<3R) and contact roller (IL).

(IR)'s own weight acts on the contact rollers (IL) and (IR>.Then, the presser rollers (2L) and (2R) come into contact with the outer peripheral surface of the take-up roll (R). ), (IR) are movably guided toward the outer peripheral surface of the take-up roll (R), and vertical rods (3L), (3
R> and the weight of the contact rollers (IL) and (IR), and is kept in contact with the outer peripheral surface of the take-up roll (R).

Next, when the take-up roll (R) is rotated around the axis (C), the presser rollers (2L), (2R) and contact rollers (LL>, (IR) follow the take-up roll (R). ,
They rotate around the axes (C,) and (C2), respectively.

Therefore, the friction is small and the take-up roll (R) is not damaged.

Further, as the take-up roll (R) rotates, the ends (WE>) of the web are connected to each presser roller (2L).

(2R) and the position of the contact roller (IL), <IR). A certain level difference is formed depending on the thickness of the end of the web, and the contact rollers (IL) and (IR) are affected by it. Therefore, the vertical rod (3L),
(3R) and the contact roller (IL), <IR) are pushed down by their own weight,
Contact rollers (IL), (IR) are vertical rods (3L),
'(3R) and descends by a distance corresponding to the thickness of the web end (WE). Vertical rod (3L)
, (3R) move along the bearing (5) of the carriage (4), which in turn moves along the vertical rod (3L), (
3R) and a contact roller (IL).

(IR).

Furthermore, among the contact rollers (IL) and (IR), the end of the web (WE) passes through the left contact roller (IL) first, and the end of the web (WE) passes through the left contact roller. (IL) and each contact roller (IL>
, (IR). Therefore, first, only the left contact roller (IL) and vertical rod (3L) are lowered, and the right contact roller (IR) and vertical rod (3R) are lowered.
does not descend. Therefore, each contact roller (IL), (
IR) and the vertical rods (3L) and (3R) are relatively displaced, and the limit switch (7) of the vertical rod (3L) comes into contact with the tip of the vertical rod (3R). This operates the limit switch (7), and the contact roller (IL), (
IR) is detected. Therefore, the end (WE) of the web of the take-up roll (R) can be detected by the limit switch (7). Then, when the web end (WE) passes the position of the right contact roller (IR), the right contact roller (IR) and the vertical rod (3R) also descend, and the tip of the vertical rod (3R) (3L) away from the limit switch (7).

Also, this device is not affected by the diameter and curvature of the take-up roll (R). Regardless of the diameter and curvature of the take-up roll (R), the contact rollers (LL), (IR) and presser rollers (2L>, (2R) can be brought into contact with the outer peripheral surface of the take-up roll (R), The end of the web (WE) of the take-up roll (R) can be detected by the limit switch (7). Also, if the contact rollers (IL>, (IR)) and the take-up roll (R) are misaligned, For example, contact roller (IL), intermediate surface (Y) of (IR>
When the position of the take-up roll (R) is shifted to the right side, the contact roller (IL), <IR) and the presser roller (2
When lowering L>, (2R), each presser roller (2L)
, (2R), the right presser roller (2R) first comes into contact with the outer peripheral surface of the take-up roll (R>).Then, the carriage (4) swings around the bin (9), and the left The presser roller (2L) contacts the outer peripheral surface of the take-up roll (R).

As a result, the contact rollers (IL), (IR) and presser rollers (2L), (2R) are arranged so that their intermediate surfaces (Y) pass through the axis (C) of the take-up roll (R), and the Vertical rods (3L), (3R) of rollers (IL), (IR)
is arranged parallel to the plane (Y) passing through the axis (C) of the take-up roll (R). Therefore, so to speak, the winding roll (R)
The contact rollers (I L) and (I R
) and vertical rods (3L) and (3R) can achieve self-centering action. Therefore, the take-up roll (R)
As the end of the web (WE) passes through the positions of the contact rollers (IL) and (IR) as the web rotates, the contact rollers (IL) and (IR) are accurately displaced relative to each other, and the limit switch (7) is activated. can be operated reliably. Therefore, the web end (WE) of the take-up roll (R) can be accurately detected.

Therefore, for example, after detecting the web end (WE), the take-up roll (R) can be rotated by a certain angle and a tape can be applied to the web end (WE). Other methods of processing the web end (WE) are possible, and it is possible to automate this.

Furthermore, when unwinding the continuous web from the take-up roll (R), it is also possible to detect the web end (WE) of the take-up roll (R) and automate the unwinding of the continuous web. Therefore, it is also possible to automate the entire process of a winder such as a slitter and its related equipment.

In addition, in this example, a vertical rod (3L) is used.

(3R) and the contact rollers (IL), (IR)'s own weight is applied to the contact rollers (IL), (IR), and the contact rollers (IL), (IR) are brought into contact with the outer peripheral surface of the take-up roll (R). Although the explanation has been given on a device in which the elasticity of an elastic means such as a spring is applied to the contact roller (IL), (IR)
may be made to act. In addition, contact rollers (IL), (I
R), but other structures of contacts may be used. Furthermore, a detector such as a differential transformer may be used instead of the limit switch (7). Instead of the cylinder (8), a lifting/lowering operation mechanism having another structure may be used. In short, a pair of contacts are arranged at intervals in the circumferential direction of the take-up roll (R). Furthermore, each contact is movably guided toward the outer circumferential surface of the take-up roll (R), and each contact is moved toward the take-up roll (R) by its own weight or elastic means.
It is sufficient if it is brought into contact with the outer circumferential surface of =(R). If a detector is provided between each contact to detect the relative displacement between the two, the end (WE) of the web of the take-up roll (R) can be detected by this detector, and the same effect can be obtained. be able to.

DETAILED DESCRIPTION OF THE INVENTION As described above, the present invention is capable of detecting the end of a web on a take-up roll by a detector such as a limit switch. Therefore, the processing at the end of the web can be automated and the intended purpose can be achieved.

When unwinding a continuous web from a take-up roll, it is also possible to detect the end of the web on the take-up roll and to automate the unwinding of the continuous web.

[Brief explanation of drawings]

The drawings are explanatory diagrams showing one embodiment of the present invention. (R)--------------------------------Take-up roll (WE)--------------------------------------
・Web end (IL), (IR)・・・Contact roller (7)・・・・・・・・・・・・・・・・・・・・・
・Limit switch patent applicant Co., Ltd.
Nishimura Seisakusho representative: Ken Zanmi
Department (1 outside person)

Claims (1)

[Claims] A pair of contacts are arranged opposite to each other on the outer peripheral surface of the take-up roll, each of the contacts is arranged at intervals in the circumferential direction of the take-up roll, and each of the contacts is directed toward the outer peripheral surface of the take-up roll. A detector is provided between each of the contactors for detecting relative displacement between the contactors by movably guiding the contactors to bring them into contact with the outer peripheral surface of the take-up roll by their own weight or elastic means, A web end detection device for a take-up roll, characterized in that the detector detects the end of the web of the take-up roll.