JPH0665498U - Guide device - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the edges of running endless felt from wearing and to adjust the deviation of the felt. A metal body or a metal oxide 12 is attached to an edge portion of a felt 4 traveling in a traveling direction on a guide roll 8, and the metal body or the metal oxide 12 is used as a detection means using a magnetic field, that is, a magnetic field. It is detected by providing the proximity switches 1 and 1 '. And this detection makes felt 4
Is detected to be biased to the front side or the rear side, this detection signal is sent to the controller 2 and the controller 2
Sends a signal to the servo motor 3, the screw shaft 11 is rotated by the servo motor 3, and the suspension arm 15 is rotated to move the guide roll 8 in the front-rear direction and adjust the deviation of the felt 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a guide device applied to a paper machine.

[0002]

[Prior art]

 FIG. 2 shows a conventionally proposed guide device for detecting the position of the felt in the width direction and moving the felt in the front-rear direction. A guide roll 8 for supporting the belt-shaped felt 4 is provided. One end a of the shaft 8a of 8 is rotatably supported by a suspension arm 15. Further, the central portion and the lower end portion of the suspension arm 15 are connected to the rod 7a of the diaphragm 7 and the compression spring 6 which have an axis substantially parallel to the flow direction of the felt 4. Further, a palm 5 is provided on the entrance side of the guide roll 8 and on the diaphragm 7 side. The palm 5 hits the edge of the felt 4 and is hingedly connected to the air valve 16 so as to be movable in the width direction thereof. . Further, the diaphragm 7 and the air valve 16 of the palm 5 are connected by an air pipe 9 and are also connected to an air source. In the figure, 10 indicates a stand for the suspension arm 15, the diaphragm 7, and the spring 6. The guide roll 8 and its shaft 8a are, for example, spline-engaged (not shown), and the coaxial 8a is rotatably supported by a suspension arm 15. For example, the suspension arm 15 is centered around the shaft 8a. When rotated in the direction, the guide roll 8 is pushed backward by the shaft 8a by a cam or the like (not shown) and moves in a direction away from the palm 5 together with the felt 4. Conversely, when the suspension arm 15 rotates counterclockwise, The guide roll 8 is designed to move together with the felt 4 with respect to the shaft 8a in the opposite direction to the above by a spring or the like not shown.

In the above configuration, the palm 5 pressed against the edge of the traveling felt 4 is pushed forward as the felt 4 moves in the direction of the palm 5, and the air valve 16 at the root thereof is pushed. The valve is gradually opened to reduce the pressure of the air pipe 9 connected to the valve. The lower end of the suspension arm 15 that normally supports one end a of the guide roll (felt roll) 8 is pushed out by the spring 6 in the direction away from the stand 10 side, and at the same time, the central portion of the suspension arm 15 is moved by the diaphragm 7 to the rod. By pushing 7a from the stand 10, the suspension arm 15 is balanced without rotating in any direction. Here, when the pressure of the air pipe 9 connected to the diaphragm 7 decreases, the rod 7a of the diaphragm 7 loses the force to push out the suspension arm 15, so the lower end of the suspension arm 15 is pushed by the spring 6 and the suspension arm 15 Rotates clockwise. Therefore, the guide roll 8 is moved rearward by a cam or the like (not shown), and as a result, the felt 4 is moved in a direction away from the palm 5. On the contrary, when the felt 4 moves away from the palm 5, the felt 4 operates in a direction reverse to the above operation, and the guide roll 8 is pushed to the front side by a spring, for example, so that the felt 4 is moved toward the palm 5. As described above, the felt 4 is guided so as to travel at a fixed position in the width direction.

[0004]

[Problems to be solved by the device]

 In recent years, the speed of paper machines has been steadily increasing, so in the felt edge detecting device in which the felt 4 and the palm 5 are in contact with each other as in the past, the felt 4 or the palm 5 is rapidly worn. , There was a drawback that its life is reduced. Moreover, the fact that the felt 4 was in contact with the par 5 contained the risk of an accident. Further, in the conventional device, the air pipe 9 is provided between the felt end detecting means and the roll movement actuator including the diaphragm 7, and the signal transmission is performed by the change of the air pressure. The time constant was large, resulting in felt 4 meandering. Although a means for optically detecting the felt edge has been proposed in the past, it was extremely unreliable in a bad environment (high temperature, high humidity, paper dust). The present invention is intended to solve the above conventional problems.

[0005]

[Means for Solving the Problems]

 Therefore, the present invention is a guide device for a traveling endless felt, in which a metal body or a metal oxide is attached to the edge of the felt, and the metal body or the metal oxide is detected in a non-contact manner using a magnetic field. Means for detecting the deviation of the felt by the detecting means, and also for adjusting the deviation of the felt when the deviation of the felt is detected by the detecting means. Then, this is the means to solve the problem.

[0006]

[Action]

 The position in the width direction of the felt is detected by detecting the metal body or the metal oxide attached to the edge of the felt by the detecting means using a magnetic field in a non-contact manner, and this detecting signal is sent to the adjusting means. This adjusting means corrects the position of the felt according to the input signal. As described above, the non-contact detection means utilizing the magnetic field has no fear of the felt being worn and the deviation of the felt is adjusted.

[0007]

【Example】

 The present invention will be described below with reference to the embodiments of the drawings. FIG. 1 shows an embodiment of the present invention. In FIG. 1, the same parts as those in FIG. 2 will be described using the same reference numerals. In the figure, a is one end of the guide roll 8, 4 is a felt, 10 is a stand, and 15 is a suspension arm, which are the same as in FIG. Explaining the points different from FIG. 2, one end of a screw shaft 11 which is substantially parallel to the flow direction of the felt 4 is screw-engaged with the lower end of the suspension arm 15 for suspending the guide roll 8. The other end of the screw shaft 11 is connected to the servomotor 3. When the screw shaft 11 rotates in one direction and the suspension arm 15 rotates, for example, in the clockwise direction, the guide roll 8 is pushed by the cam or the like (not shown) with respect to the shaft 8a and moves rearward in the figure, so that the suspension arm 15 is rotated. When is rotated in the opposite direction, the guide roll is moved forward by a spring or the like (not shown). Further, a metal body or a metal oxide 12 is attached to the edge of the felt 4 on the front side of the guide roll 8, and the position in the width direction of the felt 4 is located above the edge of the felt 4 on the entrance side. A detection means for detecting using a magnetic field, that is, a proximity switch 1, 1'using a magnetic field is provided. The proximity switches 1, 1'and the servomotor 3 are connected to a controller 2 which is a control means. Therefore, the metal body or metal oxide 12 on the edge of the felt 4 is detected by the proximity switches 1, 1 ′, and the detection signal is sent to the servomotor 3 via the controller 2. As a method of attaching a metal body or a metal oxide to the felt 4, a method of weaving a metal or metal oxide wire, a method of adhering a metal or metal oxide tape, a metal or metal oxide powder, or A method of applying a resin agent containing metal or metal oxide powder may be considered.

In the above configuration, the proximity switches 1, 1 ′ for detecting the ends of the felt 4 have a biased felt, and when the metal body or the metal oxide 12 crosses the detection range of the proximity switches 1, 1 ′, The detection signal is sent to the controller 2. Here, when the detection signal of the inner proximity switch 1 is cut off, the controller 2 rotates the screw shaft 11 in a direction to rotate the suspension arm 15 clockwise, for example, with respect to the servo motor 3 connected by the screw shaft 11. A signal is sent and the servomotor 3 rotates in that direction. As a result, the guide roll 8 moves rearward with respect to the shaft 8a by a cam or the like (not shown). Therefore, the felt 4 moves to the center side, but when the metal body or the metal oxide 12 is removed from the detection range of the proximity switch 1 ′ on the outside, the felt 4 moves to the front side again by the reverse operation. Then, the controller 2 adjusts the servo motor 3. Therefore, the edge of the felt is always in the vicinity of the detection range of the proximity switches 1 and 1'and is guided with high accuracy.

Here, the detection range of the proximity switches 1, 1 ′ may be selected to have an appropriate size according to the finished state of the edge of the felt 4 and the linearity. Further, the number of proximity switches may be three or more, and instead of the proximity switches, a displacement sensor using a magnetic field for detecting the displacement of the metal body or the metal oxide in the lateral direction of the felt 4 may be used. Further, although the servo motor 3 and the screw shaft 11 are used in the above-mentioned embodiment, a normal electric motor, an air motor, a hydraulic cylinder, or an air cylinder may be used respectively.

[0010]

[Effect of device]

 As described in detail above, according to the present invention, the felt position can be detected by non-contact using a magnetic field, the maintenance is facilitated, and the felt can be used in a bad environment. Further, the bias of the felt can be easily adjusted by the adjusting means according to the detection signal of the felt position. Therefore, even during high-speed operation, high guide performance can be maintained, reliability and operation efficiency are improved, and since there is no contact, there is no problem of wear unlike conventional guide devices.

[Brief description of drawings]

FIG. 1 is a perspective view of a guide device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an example of a conventional guide device.

[Explanation of symbols]

 1, 1'Proximity switch using magnetic field 2 Controller 3 Servo motor 4 Felt 8 Felt roll 10 Stand 11 Screw shaft 12 Metal body or metal oxide 15 Suspension arm

Claims (2)

[Scope of utility model registration request] 1. A traveling guide device for an endless felt, wherein a metal body or a metal oxide is attached to an edge of the felt, and the metal body or the metal oxide is detected in a non-contact manner by using a magnetic field. And a guide device for detecting the bias of the felt by the detecting means. 2. The guide device according to claim 1, further comprising adjusting means for adjusting the deviation of the felt when the deviation of the felt is detected by the detecting means.