JPH0577898U - Antistatic device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an antistatic device capable of completely removing electrostatic charges and completely preventing sparks at a separation portion between a photosensitive web and an interleaving web. [Structure] In a charge removing device for removing a charge by disposing a charge eliminator at a peeling portion of both webs when a coil wound by superposing a photosensitive web and an interleaving web is unwound, It has a movement detecting means for detecting the movement of the peeling portion due to the decrease, and a static electricity eliminator moving means for moving the static eliminator following the movement of the peeling portion by a signal from the movement detecting means.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a destaticizing device for removing static electricity charged on a photosensitive web and an interleaving web when unwinding a coil wound by being superposed on the web.

[0002]

[Prior Art]

 When static electricity is generated on the photosensitive web and the interleaving web that protects the photosensitive web when they are unwound from the coil that is wound and wound, the photosensitive web and the interleaving web may be separated from each other. Sparks may occur at the peeling part due to peeling electrification. When such a spark is generated at the peeling portion, static marks appear on the photosensitive web, so-called fogging occurs.

Conventionally, in order to prevent fogging of the photosensitive web due to such a spark, as shown in FIG. 4, a static eliminator 3 such as a metal molding is provided on the interleaving web 2 separated from the photosensitive web 1. The charge is removed by contact.

Further, Japanese Patent Application Laid-Open No. 62-131500 discloses a structure in which a material having a positive charge and a material having a negative charge due to frictional charging with a web are alternately combined in a web carrying direction as a web carrying roller. There is disclosed a technique of removing the electrostatic charge by using the above.

[0005]

[Problems to be solved by the device]

 It is preferable to attach the static eliminator 3 as close as possible to the peeling portion 4 where the spark is generated. However, since the position of the peeling portion 4 moves due to the decrease in the diameter of the coil 5, in the conventional device, the static elimination is performed. Since the body 3 had to be attached at a position away from the peeling portion 4, a sufficient charge eliminating effect could not be obtained, and fogging of the photosensitive web due to spark could not be completely prevented.

The present invention has been made in order to eliminate the drawbacks of the above-described conventional charge removing device. That is, it is an object of the present invention to provide an antistatic device that can completely remove electrostatic charges and can completely prevent sparks at the peeling portion between a photosensitive web and an interleaving web.

[0007]

[Means for achieving the object]

 In order to achieve the above-mentioned object, this invention removes static electricity by disposing a charge eliminator at the peeling part of both webs when a coil wound by overlapping a photosensitive web and an interleaving web is unwound. In the static eliminator, movement detecting means for detecting movement of the peeling part due to reduction of the coil diameter, and movement of the charge removing body for moving the charge eliminating body in accordance with the movement of the peeling portion by a signal from the movement detecting means. It is characterized by having means.

As an embodiment of the present invention, the movement detecting means is a coil lower surface detection roll which is urged upward by a weight suspended via a wire and abuts against a lower portion of the coil. The static eliminator moving means is a guide member for guiding the static eliminator along the moving direction of the weight and the wire connecting the weight and the static eliminator, or the movement detecting means is a proximity sensor. Alternatively, it is an electric linear motion mechanism that moves the photo sensor and this sensor along the moving direction of the peeling section, and the static eliminator moving means moves the static eliminator along the moving direction of the peeling section based on the detection signal from the sensor. An electrification removing device, which is an electric direct drive mechanism, is included.

[0009]

[Action]

 According to the above-described charge removing device of the present invention, the static eliminator removes the static electricity charged on the photosensitive web and the interleaf web at the peeling part where the web is unwound from the coil and the photosensitive web is removed. Generation of sparks due to peeling charge is prevented. Then, when the movement detecting means detects the movement of the peeling section due to the decrease in the coil diameter, the static eliminator is moved by the static eliminating body moving means so as to follow the movement of the peeling section, and the static eliminator is always positioned at the peeling section. By doing so, the generation of sparks due to peeling electrification is completely prevented.

[0010]

【Example】

 Hereinafter, the present invention will be described in more detail based on the embodiments shown in the drawings.

In FIGS. 1 and 2, a coil lower surface detection roll 10 has an axial direction parallel to the axial direction of the coil 5 below the coil 5 in which the photosensitive web 1 and the interleaving web 2 are superposed and wound. The coil lower surface detection roll 10 is supported by a slide guide 12 vertically fixed to a frame 11 at a lower portion of the coil 5 so that both ends thereof can be lifted and rotated. ..

One end of the wire 14 wound around the upper side of the guide rollers 13 a and 13 b rotatably supported on the lateral side of the coil 5 is connected to both ends of the coil lower surface detection roll 10. The other end of the wire 14 is connected to the weight 15 and the weight 15 is suspended. Therefore, the coil lower surface detection roll 10 comes into contact with the lower outer peripheral surface of the coil 5 by being urged upward by the weight 15 through the wire and moving up along the slide guide 12. There is.

In the vicinity of the peeling portion 4 between the photosensitive web 1 and the interleaving paper web 2 of the coil 5, a static eliminator (in this embodiment, a silver molding is used) so as to come into contact with the upper surface of the peeled interleaving paper web 2. 16) is installed sideways, and this static eliminator 16 is slidable on a slide guide 17 which is fixed to the frame 11 and whose both ends intersect the vicinity of the peeling portion 4 and extend substantially in the radial direction of the coil 5. It is supported.

As in the case of the coil lower surface detection roll 10, both ends of the static eliminator 16 are wound around the upper side of the guide rollers 13c and 13b rotatably supported on the side portions of the coil 5. One end of the connected wire 18 is connected, and the other end of the wire 18 is connected to the weight 15.

The lengths of the wire 14 connected to the coil lower surface detection roll 10 and the wire 18 connected to the static eliminator 16 are set such that the coil lower surface detection roll 10 is urged by the weight 15 and the outer peripheral surface of the coil 5 is lower. The static eliminator 16 is adjusted so as to be located on the interleaving paper web 2 in the vicinity of the peeling section 4 when being abutted against the.

In the above charge removing device, the static eliminating member 16 removes the static electricity charged on the photosensitive web 1 and the interleaving web 2 at the peeling section 4 which is unwound from the coil 5 and peels off the web 2. Prevents the generation of sparks due to peeling charging.

When the diameter of the coil 5 decreases due to the unwinding of the web from the coil 5, the coil lower surface detection roll 10 ascends while keeping contact with the coil 5, and the weight 15 Goes down. When the wire 18 is pulled by the lowering of the weight 15, the static eliminator 16 ascends along the slide guide 17 accordingly. That is, the static eliminator 16 moves in accordance with the movement of the peeling portion 4 by the decrease in the diameter of the coil 15, and the static eliminator 16 is always located near the peeling portion 4.

As another embodiment of the present invention, as shown in FIG. 3, the proximity sensor or photo sensor 19 detects the movement of the peeling portion, and the static eliminator 16 is electrically driven based on the detection of this sensor. There is provided a device that is moved by the moving mechanism 20 and the sensor is also moved by the electric linear moving mechanism 21.

In this device, when the sensor 19 detects the movement of the peeling section 4 due to the decrease in the diameter of the coil and outputs a signal, the electric linear motion mechanisms 20 and 21 are driven by this signal, and the static eliminator is discharged. 16 and the sensor 19 are moved following the movement of the peeling unit 4, and when the sensor 19 moves to the position after the movement of the peeling unit 4, the output of the detection signal is stopped, and the driving of the respective electric linear motion mechanisms 20 and 21 is stopped. The static eliminator 16 is stopped, and the static eliminator 16 is again positioned at the peeling section 4. By repeating such a series of movements / stops of the static eliminator 16, even if the peeling portion 4 moves due to the decrease in the diameter of the coil 5, the static eliminator 16 is always positioned in the peeling portion 4, and thus the peeling is performed. It is possible to completely prevent the generation of sparks due to electric discharge.

As the static eliminator, other high-conductivity material moldings such as gold molding or a static eliminator cloth may be used in addition to the silver molding.

[0021]

[Effect of the device]

 As described above, according to the present invention, since the static eliminator moves following the movement of the stripping part due to the decrease in the coil diameter, the static eliminator can always be positioned near the stripping part, and sufficient static erasing is possible. By doing so, it is possible to completely prevent the generation of sparks due to peeling electrification, and generally, as the web unwinding speed from the coil increases, the number of sparks increases, but the static eliminator Since it follows the peeling part regardless of the unwinding speed of the web, it is possible to increase the unwinding speed of the web without the risk of sparks and prevent so-called fogging on the photosensitive web. ..

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention,

FIG. 2 is a side view showing the embodiment,

FIG. 3 is a perspective view showing another embodiment,

FIG. 4 is a perspective view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Photosensitive material web 2 ... Interleaving paper web 4 ... Separation part 5 ... Coil 10 ... Coil lower surface detection roll 12 ... Slide guides 13a, 13b, 13c ... Guide rollers 14, 18 ... Wire 15 ... Weights 16 ... Static electricity remover 17 ... Slide Guide 19 ... Sensor 20 ... Electric direct drive mechanism 21 ... Electric direct drive mechanism

[Procedure amendment]

[Submission date] June 3, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

Claims (3)

[Scope of utility model registration request] 1. A static elimination device for removing static electricity by disposing a static eliminator at a peeling portion of both webs when a coil obtained by superposing a photosensitive web and an interleaving web on each other is unwound. It is characterized by having a movement detecting means for detecting movement of the peeling portion due to a decrease in diameter, and a static eliminator moving means for moving the static eliminator following the movement of the peeling portion by a signal from the movement detecting means. Antistatic device. 2. A movement detecting means is a coil lower surface detecting roll which is urged upward by a weight suspended via a wire and abuts against a lower portion of the coil, and the static eliminator moving means is the weight and this weight. The charge removing device according to claim 1, wherein the charge removing device is a guide member that guides the wire that connects the charge removing body and the charge removing body along the moving direction of the peeling portion. 3. The movement detecting means is a proximity sensor or a photosensor and an electric linear motion mechanism for moving the sensor along the moving direction of the peeling section, and the charge removing body moving means removes the charge removing body based on a detection signal from the sensor. The charge removing device according to claim 1, wherein the charge removing device is an electric linear motion mechanism that moves along the moving direction of the peeling portion.