JPH06288751A - Position detection of sliding body and its device - Google Patents

Abstract

PURPOSE:To directly detect the displacement of a sliding body itself by way of eliminating necessity of an installation space of a detection body and a sensor. CONSTITUTION:A slice lip 2 as a sliding body is made to slide by closely making contact with and along the slide surface of a front wall 3 as a fixed part. In order correctly detect the displacement of the slice lip 2, agains a standard surface A, a detection body 5 is buried in the slice lip 2. An analog position sensor 6 for detecting the detection body 5 is buried in the front wall 3 by being faced to the detection body 5. By detecting the position of the detection body 5 displaced together with the slice lip 2 when it slides by the position sensor 6, it is possible to directly know the displacement amount of the slice lip 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding member which comes into contact with a fixed side and slides in a device used for adjusting a flow rate and the like in a papermaking machine or a coating machine of a papermaking machine or other machines. The present invention relates to a slide body position detection method and device for detecting displacement.

[0002]

2. Description of the Related Art As an example, a papermaking machine will be described. For example, as in a wet part in a papermaking machine of a papermaking machine, a raw material (paper material) is made to flow on a wire part as a uniform thin film-like water stream for dehydration. In addition, where the wet paper is transferred from the wire part to the press part and squeezed water,
A head box is used as a raw material supply device for flowing the raw material into a uniform thin film on the wire part.

As shown in FIGS. 5 and 6, the head box is provided with a slice a extending in the lateral direction at the lower end of the front wall.
A slice lip b having a length corresponding to the length of the slice a for adjusting the opening degree of the slice a is provided slidably in the vertical direction, and the slice lip b is provided on the front wall surface c of the head box. The lower end portions of a plurality of slice rods d that are arranged at appropriate intervals in the lateral direction are connected, each rod d is connected to a motor e on the front wall surface c, and the slice rod d is connected by the motor e. By moving the slice lip b up and down via this, the opening amount of the slice a can be partially adjusted. f is a plow net and g is a raw material.

Conventionally, when detecting the sliding amount of the slice lip b used in the head box of such a paper machine, it is not possible to directly detect the moving amount (displacement amount) of the slice lip b itself as a sliding body. It has not been carried out. A sensor is attached to a portion of the slice rod d or a joint portion of the rod d and the slice lip b to detect the movement of the slice rod d itself, and the displacement of the slice lip b is deduced from the detected value. The actual situation is to detect the.

In order to directly detect the displacement of the sliding body, it is possible to attach the detecting body to the sliding body and the sensor to the fixed side. Conventionally, the detecting body and the sensor are used. When detecting the displacement of the sliding body, the general idea is to attach the detecting body to the sliding body and the sensor to the fixed portion from the outside.

[0006]

However, in a paper-making machine or other machine such as manufacturing or working, when the position of the sliding body on the upstream side is determined depending on the state of the downstream side to form a pattern, It is necessary to accurately detect the displacement amount of the sliding body so that the pattern can be obtained, but none of the conventional methods can detect the accurate displacement amount of the sliding body.

That is, as shown in FIGS. 5 and 6, as an example, when the slice lip b of the head box is used as a sliding body and the displacement of the slice lip b is detected to adjust the opening of the slice a, When it is known from which flow pattern of the raw material on the side to adjust the opening of the slice a, it is possible to know exactly how the slice lip is deformed in order to obtain the pattern. However, in the conventional method, the displacement of the slice lip b as a sliding body is not directly detected, but the displacement of the slice rod d itself is detected and then the displacement of the slice lip b is estimated by estimation. Therefore, the deformation of the slice lip b between the adjacent slice rods d cannot be accurately detected,
Further, since the slice rod d itself has a backlash and an accurate value cannot be obtained, it is not applicable to a place where the opening degree of the slice a is automatically adjusted from the situation on the downstream side as described above. It is possible.

Further, in the case of the method of directly detecting the sliding body by using the detecting body and the sensor, in the conventional technique, the idea is to attach the detecting body to the sliding body and the sensor to the fixed portion from the outside. Therefore, it is practically difficult to attach the detection body to the sliding body itself due to the limitation of the mounting space, and it is difficult to adopt it in places where it is necessary to obtain an accurate displacement amount in a narrow space. In the environment, consideration must be given to the detection body and sensor so that it can withstand a bad environment, and it is generally expensive. In the case of attaching the detection body to the sliding body from the outside, the sliding body and its Since the detector is attached to the intermediate part of the drive unit to detect the movement of a part a little away from the sliding body, there is "backlash" or "increase" that is inherent between the detecting body and the final sliding body. Chijimiibitsu "and" twist "
, The detection error due to will always come out, and the true detection value cannot be obtained.If the sensor is attached to the outside of the fixed part, it will be bulky, the mechanism will be complicated, and the processing cost will be increased, etc. However, there is a problem in that it cannot be used for a device that requires accurate detection of the amount of displacement of the sliding body depending on the downstream conditions.

Therefore, according to the present invention, the operation of the equipment on the upstream side is controlled from the situation on the downstream side, and the displacement amount of the sliding body on the upstream side is directly detected to accurately adjust the sliding body. In addition to being able to accurately detect the displacement of the sliding body, it can be mounted on the sliding body in a narrow space by eliminating the restriction on the mounting space of the detecting body and the sensor. Even below, it is intended to eliminate the need to take measures against the adverse environment on the sensor and the detection body.

[0010]

In order to solve the above-mentioned problems, the present invention has one or a plurality of detectors embedded in a sliding body that slides along the surface of a fixed portion. A sensor corresponding to the detection body is embedded in the fixed portion side toward the side on which the slide body slides so that the displacement of the slide body can be directly detected.

When the sliding body is an elongated and elastic body and slides in a direction perpendicular to the longitudinal direction, a plurality of detection bodies are arranged at a fine pitch along a direction orthogonal to the sliding direction or The sensor is embedded continuously, and the sensor is embedded in the fixed portion in association with the detection body so as to detect the displacement amount of each portion of the long sliding body.

[0012]

When the sliding body moves, the amount of movement is detected by the sensor, so that the position of the sliding body can be detected immediately.
Since both the sensor and the detection body are embedded, there is no need for a mounting space, and no consideration is given to withstand a bad environment even when used in a bad environment.

[0013]

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

FIGS. 1 to 3 show an embodiment of the present invention, and show a case where a slice lip of a head box of a paper machine is used as a sliding body and its displacement is detected.

A slice lip 2 as a sliding member made of an elastic body having a length corresponding to the length of the slice 1 for adjusting the opening of the slice 1 extending in the lateral direction is attached to a front wall 3 which is a fixed portion. Along the front of the slice lip 2, the lower ends of the slice rods 4 arranged at appropriate intervals are attached to the front face of the slice lip 2, respectively.
The upper end of each slice rod 4 is independently connected to a motor (not shown) installed on the front wall 3 so that the slice lip 2 can be vertically displaced via the slice rod 4 by each motor. At
A large number of detection bodies (magnets or magnetic bodies) 5 are aligned at a fine pitch with a slight interval in the longitudinal direction of the slice lip 2 as the above-mentioned sliding body and embedded as shown in the drawing, and on the front wall 3 serving as a fixed portion. , A plurality of analog position sensors (magnetic sensors or proximity sensors) 6 corresponding to the respective detection bodies 5 in the slice lip 2 are embedded respectively toward the slice lip 2 side as a sliding body as shown in the figure, and as fixed parts. The relative displacement between the front wall 3 and the slice lip 2 as a sliding body, that is, the amount of displacement of the slice lip 2 in the direction perpendicular to the longitudinal direction can be detected by the output value of the sensor 6.

The sensor 6 for detecting the position of the detection body 5 embedded in the slice lip 2 is connected to an arithmetic unit 8 via an amplifier 7 as shown in FIG. 3, and amplifies the signal detected by each sensor 6. After that, the input to the arithmetic unit 8 is made possible, and the opening of the slice 1
When the lower surface of the is the reference surface A, the distance between the lower surface of the slice lip 2 and the lower surface until the displacement of the slice lip 2 with respect to the reference surface A is a set value 9
When the signal from the sensor 6 is input to the arithmetic unit 8 which is input as, the displacement amount of the slice lip 2 with respect to the reference plane A is calculated and displayed on the display unit 10. There is.

Although FIG. 1 shows a case where the necessary number of detecting bodies 5 are embedded in the slice lip 2 as a sliding body at a fine pitch, the detecting bodies 5 are embedded continuously in the longitudinal direction of the slice lip 2. But it's okay.

When each slice rod 4 is moved by the same amount at the same time, the slice lip 2 is displaced by the same amount in the longitudinal direction, and when an arbitrary slice rod 4 is moved more than other slice rods 4, The slice lip 2 is partially deformed.

When the slice lip 2 is slid in the direction of closing the slice 1, the detection body 5 embedded therein is also displaced at the same time. Therefore, by detecting the displacement of the detection body 5 with the sensor 6, the slice lip 2 The displacement at each position in the longitudinal direction of 2 can be directly detected, and
It is possible to know the profile of the displacement amount of the slice lip 2 in the longitudinal direction.

In the above, when the detection body 5 is a magnet, the magnet is embedded so that the S pole and the N pole are in the sliding direction. As a result, when the slice lip 2 slides and the magnet passes through the position of the sensor 6 embedded in the fixed portion side, the displacement amount of the slice lip 2 itself is accurately determined by the output value of the sensor 6 that changes due to the magnetic force. Can be detected.

When the detector 5 and the sensor 6 are embedded as in the embodiment shown in FIGS. 1 and 2, there is no mounting space as compared with the method of attaching the detector and the sensor from the outside. Not only can it be realized in parts, but it can be used without problems even if there is a request that the sensor 6 and the detection body 5 are not damaged by water, oil, etc., and consideration must be given to withstand a bad environment. It will be unnecessary.

Next, FIG. 4 shows another embodiment of the present invention. For example, a spline or the like can be used so that the slider 11 in the fine adjustment device can be slid only in the axial direction in the casing 12 which is the fixed portion. The screw shaft 14 connected to the motor 13 is screwed into the female screw portion 15 provided at the shaft center portion of the slider 11, and the motor 13 rotates the screw shaft 14 in the forward or reverse direction to move the slider 11 in place. In the structure in which the casing 12 is moved in and out to be displaced, the detection body 5 is embedded in a required portion of the slider 11 and the position sensor 6 is provided in the casing 12.
Is attached so as to face the detection body 5, and the displacement amount of the slider 11 displaced by the motor 13 can be directly known by detecting the position of the detection body 5 which is simultaneously displaced by the position sensor 6. It is the one.

The present invention is not limited to the above-described embodiments. For example, in each of the above-mentioned embodiments, the slice lip 2 or slider 11 as a sliding body is used.
The case of embedding a detection body in the above is shown, but as long as the sliding body itself can be given magnetic properties and can be used as a detection body, it will be possible to carry out without embedding a detection body separately. Further, as an example, the case where the slice lip 2 in the head box of the paper machine is used as a sliding body has been described. What kind of object is one-dimensionally sliding along the fixed surface in any field with respect to the fixed side? It is needless to say that the present invention can be applied to all those for the purpose of knowing whether it is in the position, and that various changes can be made without departing from the scope of the present invention.

[0024]

As described above, according to the present invention, in order to detect the displacement of the sliding body sliding on the surface of the fixed portion with respect to the fixed portion, one or a plurality of detection bodies are embedded in the sliding body. Moreover, since the position sensor for detecting the position of the detection body is embedded in the fixed portion in correspondence with the detection body and the displacement of the sliding body is directly detected, the following excellent effects can be obtained. . (i) Since the detection body is displaced simultaneously with the movement of the sliding body, the displacement amount of the sliding body itself can be accurately detected by detecting the displacement of the detection body with the sensor. This is effective for those that require direct detection of the amount of displacement of the sliding body. (ii) Since the detection body and the sensor are embedded, there is no restriction on the mounting space, and it can be easily applied to those that cannot be mounted from the outside. (iii) Since the detection body and the sensor are embedded, it is not necessary to use a detection body and a sensor having waterproof and anticorrosion properties, and the cost can be reduced. (iv) Sliding body is long and slender, and a plurality of detection bodies are embedded in the longitudinal direction at a fine pitch, or the detection bodies are embedded in succession, while a plurality of sensors corresponding to the detection bodies are provided in the fixed portion. By embedding, the displacement amount of each part when the sliding body slides in the direction perpendicular to the longitudinal direction can be detected by each sensor, and the longitudinal position pattern can be easily known. become.

[Brief description of drawings]

FIG. 1 is a front view showing an example applied to detect a movement amount of a slice lip of a head box of a paper machine as an embodiment of the present invention.

2 is a cut side view of FIG. 1. FIG.

FIG. 3 is a circuit diagram of a sensor.

FIG. 4 is a sectional view showing another embodiment of the present invention.

FIG. 5 is a side view showing an example of a head box of a paper machine.

FIG. 6 is a front view of FIG.

[Explanation of symbols]

 1 Slice 2 Slice lip (sliding body) 3 Front wall (fixed part) 4 Slice rod 5 Detecting body 6 Analog position sensor (position sensor) 8 Computing device 11 Slider (sliding body) 12 Casing (fixed part)

Claims (3)

[Claims] 1. A method for detecting the position of a sliding body, wherein the sliding body is arranged so as to closely contact the sliding surface of a fixed portion so as to slide one-dimensionally, and the position of the sliding body is detected. ,
A detection body is installed by embedding it at a position close to the fixed portion of the sliding body, and a position sensor that detects the detection body is embedded in the fixed portion so as to correspond to the detection body, and the position sensor is displaced with the sliding body. A method for detecting the position of a sliding body, wherein the position of the sliding body is detected by obtaining a displacement amount with a position sensor. 2. The sliding body is composed of an elongated elastic body, and the sliding body slides in a direction perpendicular to the longitudinal direction, and a plurality of detection bodies are arranged at a fine pitch in the longitudinal direction of the sliding body. The position of the sliding body according to claim 1, wherein the sliding body is embedded continuously, and the position sensor is embedded in the fixed portion so as to correspond to the detection body, and detects the amount of displacement in the direction perpendicular to the longitudinal direction of each part in the longitudinal direction of the elongated sliding body. Detection method. 3. One or a plurality of detection bodies are embedded and installed in a sliding body arranged so as to closely slide along a sliding surface of the fixed portion so as to slide one-dimensionally. In addition, a position sensor for detecting the detection body is embedded and installed so as to correspond to the detection body, and the detection body and the sensor are arranged close to each other across the surface of the fixed portion and face each other. Position detector for sliding body.