JP3387114B2 - Winding device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to printing, film production,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding device used in the manufacture of papermaking, adhesive tape, magnetic tape, or the like, and more particularly to a winding device capable of winding a magnetic tape cut to a predetermined width at a high speed without any disturbance. 2. Description of the Related Art In the process of manufacturing a magnetic recording medium, a magnetic tape having a magnetic layer formed on a non-magnetic support is generally subjected to a predetermined surface treatment or the like and then to a predetermined width or length. And wound by a winding device on a winding core (hub) having a predetermined standard. Conventionally, the magnetic tape wound on the hub as described above is often automatically taken out of the winding device from the viewpoint of workability and the like. For this reason, as the winding device, a device in which the rotation shaft of the hub is arranged coaxially with the rotation shaft of a drive system for rotating the hub is widely used. For example, in this winding device, as shown in FIG. 2, a hub 23 is held on a peripheral surface of a rotation shaft 21 which is connected to a motor (not shown) and is driven to rotate by the motor. The hub holder 22 is supported, and the hub holder 22 is driven to rotate in accordance with the rotation of the rotation shaft 21. This hub holder 2
2 is detachably attached to the rotating shaft 21 so that it can be automatically taken out from the rotating shaft 21. Accordingly, in this winding device, a magnetic tape 24 cut to a predetermined width is rolled on the outer peripheral surface of the hub 23 which is driven to rotate together with the hub holder 22 according to the rotation of the rotating shaft 21. It is wound up. [0006] By the way, when the magnetic tape cut into a predetermined width as described above is wound,
It is required that the magnetic tape be wound up without any disturbance. Therefore, in the winding device, the rotating shaft 21 and the hub holder 22 have a so-called slip clutch structure, and apply, for example, a lateral pressure to a pair of bearings 25a and 25b provided in contact with the rotating shaft 21. Such a mechanism is arranged in the hub holder 22 or
Alternatively, a constant tension is always applied to the running direction of the magnetic tape 24 by incorporating a permanent magnet and a copper plate in the hub holder 22 and utilizing an eddy current generated thereby. As described above, the bearings 25a, 25
When a lateral pressure is applied to b or an eddy current is generated by the permanent magnet and the copper plate, the rotation speed N ₀ of the hub 23 is made equal to the feed speed of the magnetic tape 24, and the magnetic tape 24 does not slack. The hub 2 without being pulled too much
3 and at the same time, the rotation speed N _{0 of the} hub 23 is controlled to be lower at a fixed rate than the rotation speed N ₁ of the rotating shaft 21, and the winding is performed. A predetermined winding tension is always applied to the magnetic tape 24 to be applied. [0008] However, if the thus controlled the rotational speed N ₀ of the hub 23, since the rotational speed N ₀ of the hub 23 is lower than the rotational speed N ₁ of the rotating shaft 21, the take-up device Always have two rotation speeds N ₀ and N ₁ . On the other hand, these rotation speeds N ₀ , N ₁
Varies depending on the shaft diameter, the feed speed of the magnetic tape, the tension applied to the magnetic tape, and the like, so that a phase shift occurs between the rotational speed N _{0 of the} hub 23 and the rotational speed N ₁ of the rotating shaft 21. Resonance occurs. [0009] When such resonance occurs, a streak-like pattern due to a winding deviation in the width direction appears on the side surface of the wound roll-shaped magnetic tape (so-called pancake), and the magnetic tape is well wound up. You will not be able to do it. Further, such a phenomenon becomes more conspicuous as the operation speed of the apparatus increases, which causes a problem in improving the productivity and also causes inconvenience such as necessity of a rewinding operation. Further, during the rewinding operation, there is a possibility that the portion of the magnetic tape where the winding deviation has occurred may be damaged and quality characteristics may be degraded. Accordingly, the present invention has been proposed in view of the above-described conventional circumstances, and has as its object to provide a winding device that does not have winding disturbance and can be wound up in a good shape. The winding device of the present invention has been proposed to achieve the above-mentioned object. That is, the present invention
A fixed shaft having a predetermined diameter, and a hub holder is rotatably mounted on the fixed shaft. The hub holder is held by the hub holder, and the outer peripheral surface of the hub is a rolled sheet cut to a predetermined width. An object is wound up, and a bearing is disposed between the hub holder and the fixed shaft in contact with the fixed shaft, and a hub held by the hub holder is positioned directly above the bearing. A torque clutch for indirectly driving the hub holder holding the hub in parallel with the fixed shaft is provided, and rotation of a driving source is transmitted to an input shaft of the torque clutch. The hub is driven to rotate along the peripheral surface of the fixed shaft together with the hub holder. A hub is mounted around a fixed shaft having a predetermined diameter, and the hub is indirectly driven to rotate, whereby the hub rotates around the fixed shaft with the fixed shaft as a rotation shaft. It is made to do. For this reason, in such a winding device, two rotation speeds do not exist in the device as in the case of the conventional slip clutch structure, and the occurrence of resonance is prevented. Therefore, the object to be wound can be wound up without any deviation in the width direction due to resonance. Embodiments of the present invention will be described below in detail with reference to the drawings. In this embodiment,
This is an example of a winding device used when a magnetic tape on which a magnetic layer is formed is cut into a predetermined width and then the magnetic tape is wound. In this winding device, as shown in FIG. 1, a fixed shaft 1 having a predetermined diameter is provided, and a hub holder 2 is rotatable on the peripheral surface of the fixed shaft 1 and is detachable. Attached to. The hub holder 2 holds a hub 3 having dimensions of about 114 mm in outer diameter and about 76 mm in inner diameter (according to the standard of the NAB hub). The hub 3 is driven to rotate together with the hub holder 2 as described later, and the magnetic tape 4 running at a predetermined speed is wound around the outer peripheral surface of the hub 3.
In the present embodiment, the hub holder 2 having a flange is used. However, the present invention is not limited to this, and a hub having no flange may be used. On the other hand, a torque clutch 6 is provided in parallel with the fixed shaft 1. The torque clutch 6 is connected to a motor (not shown), and the rotation of the motor is transmitted to an input shaft of the torque clutch 6. The torque clutch 6 and the hub holder 2
A drive belt 7 is hung between the belt hanger mechanisms 2a provided on the sides of the drive belt 7. Thereby, the torque generated by the torque crack 6 is transmitted to the hub holder 2 via the drive belt 7, and the hub holder 2 is rotationally driven along with the hub 3 along the peripheral surface of the fixed shaft 1. It has been made like that. At this time, a bearing 8 is provided between the hub holder 2 and the peripheral surface of the fixed shaft 1 in contact with the fixed shaft 1.
Are arranged so that the hub holder 2 is rotationally driven with good slip. The hub 3 held by the hub holder 2 is located right above the bearing 8. In this embodiment, a drive belt 7 is used as a mechanism for transmitting the torque generated by the torque clutch 6.
However, other drive transmission mechanisms such as gears and pulleys can be used. However, in this case, it is desirable to use a drive transmission mechanism that does not easily generate dust. Therefore, in this winding device, the magnetic tape 4 cut to a specified tape width by the cutting machine is sent out from the unwinding side at a predetermined speed, and the rotation of the motor is controlled by the torque clutch 6 and the drive. Torque is transmitted to the hub holder 2 via the belt 7, and the hub 3 is driven to rotate together with the hub holder 2, and the magnetic tape 4 is sequentially wound around the outer peripheral surface of the hub 3 in a roll 4 a. When the hub 3 is rotationally driven indirectly by the torque clutch 6 and the driving belt 7, the shaft for supporting the hub 3 can be fixed, and at the same time, the torque clutch 6, the hub 3
The rotational speed N ₀ of can be controlled to be equal to the feed speed of the magnetic tape 4. Accordingly, the winding device having such a configuration does not have two or more rotation speeds in the device as in the case of having the conventional slip clutch structure, so there is no possibility that resonance occurs. . For this reason, it is possible to prevent the occurrence of winding deviation in the width direction of the magnetic tape 4, which is very advantageous in increasing the speed of the apparatus. Further, in the winding apparatus, it is possible to control the rotational speed N ₀ of the hub 3 by setting the rotational speed N ₀ of the torque clutch 6 as appropriate, without slackening the magnetic tape 4 In addition, winding can be performed while always applying a constant tension so as not to pull too much.
Therefore, unlike the conventional winding device, there is no need to provide a mechanism for generating a constant winding tension in the hub holder, so that the hub holder 2 can be made compact. On the contrary, since the dimensions of the hub 3 are fixed according to the standard, the diameter of the fixed shaft 1 can be increased by the size of the hub holder 2. Therefore, the width of the magnetic tape 4 is increased,
Accordingly, even when the width of the hub 3 for winding the magnetic tape 4 is increased, the strength of the fixed shaft 1 for supporting the hub 3 can be secured to some extent. It is possible to suppress bending of the fixed shaft 1 and perform favorable winding. In this embodiment, the winding device is used to wind a magnetic tape cut to a predetermined width. However, the winding device of the present invention may be, for example, a printed material, a film, papermaking, an adhesive tape, or the like. It can be used when winding any winding object. As is clear from the above description, in the present invention, since the hub mounted on the fixed shaft is indirectly driven to rotate, the hub is controlled by controlling the rotation speed of the hub. Winding can be performed while applying a constant tension to the wound material. Therefore, with such a device configuration, there is no possibility that resonance occurs, and therefore, it is possible to wind up to a large diameter without any deviation in the width direction from the start to the end of winding. . In addition, if resonance does not occur as described above, it is very advantageous to increase the speed of the apparatus. Further, according to the present invention, since the material to be wound can be wound without being disturbed as described above, a rewinding operation is not required, and productivity can be remarkably improved. Furthermore, according to the present invention, during the so-called decorative winding operation in the conventional manufacturing process of the magnetic tape, the edge portion of the magnetic tape which has been caused due to the above-mentioned winding deviation is eliminated, so that the magnetic tape having excellent quality is provided. Can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic sectional view showing a configuration of a winding device to which the present invention is applied. FIG. 2 is a schematic sectional view showing a configuration of a conventional winding device. [Description of Signs] 1 ... Fixed shaft 2 ... Hub holder 3 ... Hub 4 ... Magnetic tape 6 ... Torque clutch 7 ... Drive belt

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65H 18/08

Claims (1)

(57) [Claim 1] A fixed shaft having a predetermined diameter and a c
The holder is rotatably mounted, and the hub holder is
The hub holds a hub, and the outer peripheral surface of the hub
The width of the material to be wound can be wound up.
Between the hub holder and the fixed shaft.
A bearing is arranged in contact with the fixed shaft, and
The hub held by the hub holder is located directly above,
A hub holder that holds the hub in parallel with the fixed shaft
A torque clutch that indirectly drives the
The rotation of the drive source is transmitted to the input shaft of the torque clutch.
The hub and the hub holder
A winding device, both driven to rotate along the peripheral surface of the fixed shaft .