JPH04348202A - Detecting apparatus of seam of band-like continuous body - Google Patents

Abstract

PURPOSE:To obtain a seam detecting apparatus for a band-like continuous body which can be mounted regardless of the shape of the existing stage and is not necessary to be adjusted even if the thickness of the band-like continuous body is changed. CONSTITUTION:This detecting apparatus has rollers 24, 26 and a detecting means 30. The rollers 24, 26 are provided in arms 20, 22 which are movable independently of each other in a manner that the axis of each roller is at right angles to the running direction of a band-like continuous body 4 to be inspected and that the outer surface thereof is able to touch with the surface of the band-like continuous body 4. The detecting means 30 detects a seam 6 of the body 4 by detecting the relative displacement of the arms 20, 22. The rollers 24, 26 have different radii, and are arranged so that the extension line of a contact line when the outer peripheral surface of each roller 24, 26 is in line contact with the continuous body 4 becomes the same where the rollers 24, 26 are in the normal state without contact, with the seam 6 of the body 4. When the rollers 24, 26 are pressed in touch with the seam 6 of the continuous body 4, the displacement with a time difference of the rollers 20, 22 resulting from the difference of the radii of the rollers is detected by the detecting means 30, whereby the seam 6 is detected.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting seams in continuous strips of cloth, leather, etc.

0002

2. Description of the Related Art Conventionally, there is a device disclosed in Japanese Utility Model Application Laid-open No. 134108/1983 as a device for detecting seams in continuous strips of cloth, leather, etc. The joint detection device is composed of two parts: a base with a smooth upper surface on which the continuous strip can run horizontally, and a shaft arranged to cross at right angles to the running direction of the continuous strip. are resting on the other side, each base end is rotatably attached to a shaft, each free end is equipped with a roller rotatable in contact with the surface of the strip-like continuous body, Arms having different lengths so that the rollers are arranged in front and back with respect to the running direction of the continuous strip, a detection means for reading a change in the relative position of the two arms, and a means for determining the thickness of the continuous strip. It consists of an adjustment bolt that adjusts the distance between the two arms so that good detection can be obtained regardless of the When each roller moves up and down, the detection means reads the relative position change that occurs between the two arms to which each roller is attached, thereby detecting the seam in the continuous strip. It is.

0003

SUMMARY OF THE INVENTION However, the above-mentioned conventional seam detection device for continuous strips has the following problems. First, since the seam detection rollers are arranged forward and backward with respect to the running direction of the continuous strip, the continuous strip must remain horizontal in the portion where at least two rollers come into contact with each other. Therefore, the existing base is a pipe,
If it is a roller, etc., installation becomes impossible. Next, since the lengths of the two arms are different, there is a problem in that each time the thickness of the strip-like continuous body changes, the adjustment bolt must be adjusted each time so that good seam detection can be performed. Therefore, an object of the present invention is to provide a joint detection device for a continuous strip that can be installed regardless of the shape of an existing base and that does not require adjustment even if the thickness of the continuous strip changes. .

0004

[Means for Solving the Problems] In order to solve the above problems, the present invention has the following configuration. That is, a plurality of arms that are movable independently of each other, and to the plurality of arms,
Relative displacement between a plurality of rollers, each of which is rotatable and whose axis is perpendicular to the traveling direction of the continuous strip to be inspected, and whose outer peripheral surface can come into contact with the surface of the continuous strip, and the plurality of arms. In the continuous band-shaped body seam detection device, the plurality of rollers are formed to have different radii, and the plurality of rollers are formed to have different radii, and detect the seam of the continuous band-shaped body by detecting In a normal state where the rollers do not contact each other, the outer peripheral surface of each roller and the continuous strip are arranged so that the extended line of contact is the same line, and when the plurality of rollers come into contact with the seam of the continuous strip, It is characterized in that a displacement accompanied by a time difference between the arms due to a difference in the radius of the rollers is detected via the detection means.

[0005]

[Action] The action will be explained. Under normal conditions, the extension lines of the contact lines of multiple seam detection rollers with the strip-shaped continuous body are arranged on the same line, so even if the existing base is cylindrical or flat, it can be installed easily. It is possible and
Further, even if the thickness of the continuous strip changes, the relative position between the two arms to which the seam detection rollers are attached does not change, so no adjustment is necessary.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of the shaft portion of the present invention, and FIG. 2 is a side view. First, the configuration will be explained with reference to FIGS. 1 and 2. 2 is a cylindrical base;
On this upper surface, a continuous band-like body, such as a cloth 4, runs in the direction of the arrow so as to be perpendicular to the axial direction of the base 2. Note that 6 is a seam of the cloth 4. Reference numeral 8 denotes a pipe, which is rotatably supported by a bearing 12 on the wall of the main body 10, and is positioned above the cloth 4 so as to cross at right angles to the running direction of the cloth 4. ing. A shaft 14 is inserted into the pipe 8, and by inserting a spacer 16 between the shaft and the pipe 8, the shaft is rotatably supported without being affected by the rotation of the pipe 8. There is. Further, the shaft 14 and the spacer 16 are prevented from coming off by a stopper 18. 20 is a second arm, consisting of an arm component 20a, an arm component 20b, and an arm component 20c,
The arm component 20a has a U-shaped cross section, and one end is fixed to the pipe 8. Arm component 20b
The arm component 20c has a U-shaped cross section and is fixed to the lower surface of the other end of the arm component 20a by screws, welding, or the like. A first arm 22 has a U-shaped cross section, and one end is fixed to the shaft 14. The first arm 22 and the second arm 20 are arranged such that the first arm 22 and the second arm 20 are each centered on the center line of the bearing 12 of the main body 10 with the first arm 22 resting on the second arm 20. is connected to the second arm 2 by the shaft 14.
0 is rotatably supported by a pipe 8. A first roller 24, a second roller 26, and a third roller 28 are rotatably attached to the other end of the first arm 22, the arm component 20b, and the arm component 20c, respectively. The radius of the roller 26 and the third roller 28 are the same, and the radius of the first roller 24 is the same as that of the second roller 26.
, is larger than the third roller 28 radius. Regarding the mounting position of each roller, the axes of the second roller 26 and the third roller 28 are arranged on the same straight line parallel to the axial direction of the base 2, and the cloth 4 is placed on the same contact line with the first roller 24. It is attached to each arm so that it is in contact with the 30 is a coil as a detection means, and the coil 30 is attached to the mounting plate 3.
It is fixed to 2. The mounting plate 32 is attached to the second arm 2
0, it is fixed to the pipe 8. 34 is a metal plate, and like the first arm 22, it is fixed to the shaft 14. A change in the relative position of the first arm 22 and the second arm 20 is measured by a change in inductance when the metal plate 34 crosses the magnetic field lines of the coil 30. Further, as the detection means, a method for detecting a change in capacitance, a method for detecting a change in luminous flux, a method for detecting a change in air pressure, etc. can be appropriately selected and used.

Next, the operation will be explained with reference to FIGS. 3 and 4 (simplified model diagrams). The center points of the first roller 24 and the second roller 26 are designated as A and B, and each roller is arranged so as to contact the cloth 4 at the same contact point. Further, the first arm 22 and the second arm 20 are rotatably attached to the center axis D of the shaft 14. In FIG. 3, as the cloth 4 travels in the direction of the arrow, the convex seam 6 on the cloth 4 first comes into contact with the first roller 24 having a large radius, causing the first roller 24 to move upward. push up to Immediately before the seam 6 comes into contact with the second roller 26, the first roller 24 rises from the position drawn by the dashed line in FIG. A is at the position of a. Similarly, the first arm 22 also changes from the position shown by the dashed line to the position shown by the solid line, and the second arm 20 to which the second roller 26, which has not yet come into contact with the seam 6, is pivoted.
A change in relative position occurs between the two, and the seam 6 can be detected by reading this change with the detection means.

Next, when the joint 6 has a concave shape as shown in FIG. 4, the second roller 26 first engages the joint 6 and moves downward, and the center point B of the second roller 26 is It will be in position b. At this time, since the first roller 24 has a large radius, it maintains its original position, and as in the example of FIG.
A change in relative position occurs between the second arm 22 and the second arm 20, allowing the seam 6 to be detected. In this embodiment, one ends of the first arm 22 and the second arm 20 are pivotally attached to the shaft 14 and the pipe 8, which have the same central axis, so that when the thickness of the cloth 4 changes, Although there will be a slight misalignment between the contact points of the first roller 24, the second roller 26, and the third roller 28 to the cloth 4, the first roller 24,
The radius of the second roller 26 and the first arm 22, the second
By taking into account the length of the arm 20, the deviation of the contact point due to changes in the thickness of the cloth 4 can be ignored in practice.

Various preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments. For example, the first arm and the second arm may be provided with separate shafts. , for example, is pivotally supported by a first shaft and a second shaft, and the center point of the first roller, the center point of the second roller, the first shaft, and the second shaft form a parallelogram. The first arm and the second arm may be arranged so as to be suspended perpendicularly to the traveling direction of the cloth and move independently, without departing from the spirit of the invention. Of course, many modifications can be made within the scope.

0010

[Effects of the Invention] By using the belt-like continuous body joint detection device according to the present invention, it becomes possible to mount the continuous body without being influenced by the shape of the existing base. Further, even if the thickness of the strip-like continuous body changes, there is no need to readjust the seam detection device.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a shaft portion of a seam detection device for a continuous strip according to the present invention.

FIG. 2 is a side view of the seam detection device for the strip-like continuous body of FIG. 1;

FIG. 3 is a simplified model diagram of the seam detection device for the strip-like continuous body of FIG. 1, in the case where the seam is convex.

FIG. 4 is a simplified model diagram of the seam detection device for the strip-shaped continuous body of FIG. 1, in the case where the seam is concave.

[Explanation of symbols]

2 Base 4 Cloth as a continuous strip 6 Seam 20 Second arm 22 First arm 24 First roller 26 Second roller 28 Third roller 30 Coil as detection means 34 Metal plate

Claims (1)

[Claims] Claims: 1. A plurality of arms movable independently of each other; each of the plurality of arms is provided rotatably and with its axis perpendicular to the traveling direction of the strip-shaped continuous body to be inspected; Detection of joints in a continuous strip, comprising: a plurality of rollers capable of contacting the surface of the continuous strip; and detection means for detecting a joint in the continuous strip by detecting relative displacement between the plurality of arms. In the apparatus, the plurality of rollers are formed to have different radii, and the extension line of the contact line where the outer circumferential surface of each roller and the continuous strip contact in a normal state where they do not come into contact with the seams of the continuous strip is When the plurality of rollers are arranged in the same line and come into contact with the seam of the continuous strip, the displacement with a time difference between the arms caused by the difference in the radius of the rollers is detected through the detection means. A seam detection device for a band-shaped continuous body that detects the seam by detecting the seam.