JP2001159513A - Inspection method and inspection device for parallel blade group - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device capable of measuring, with high accuracy in a short time, a pitch or fall of a blade group arranged in parallel, such as a blade group of reeds used for a loom. SOLUTION: This device is equipped with a holding stand for holding the parallel blade group, a sensor carrier moving relatively in the blade arrangement direction (the weft insertion direction in the case of the reeds) of the parallel blade group held on the holding stand, two pairs of floodlights for projecting a first laser beam 8 and a second laser beam 9 from the front to the back of the parallel blade group, and a light receiver. The floodlights and the light receiver are loaded on the sensor carrier, and the first laser beam and the second laser beam are projected at different angles relative to an axis in the blade arrangement direction of the parallel blade group. The first and second laser beams are projected toward the blades, and simultaneously the sensor carrier is scanned in the blade arrangement direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for inspecting a group of blades arranged in parallel, for example, a group of reed blades used in a loom, and more particularly to a method and an apparatus for detecting the pitch and inclination of each blade. is there.

[0002]

2. Description of the Related Art The role of a reed in a loom is to drive a weft and align warps. The quality of the woven fabric depends on the accuracy of the reed (reed), and if the reed is rough or the reed falls, the warp spacing will be irregular, There is a possibility that the contact resistance is increased and the yarn fluff or glue drop occurs.

In recent years, in particular, due to the increase in the density of the fabric, the increase in the number of revolutions of the loom, and the appearance of delicate yarns, minute defects in the reeds have a great effect on the fabric, resulting in the occurrence of reed streaks and fluffing. The occurrence of defective fabrics tends to increase. Further, in the textile industry at present, production of many kinds and small lots is increasing, so that the occurrence of defective fabrics due to the above-mentioned causes is a very serious problem.

On the other hand, in order to solve the above-mentioned weaving problem, efforts have been made to make the reeds as uniform as possible during the production of reeds. However, the only way to inspect the manufactured reeds and check the accuracy is to use a hand-held device such as a protractor or an electronic ruler. Therefore, there is a problem that it takes a lot of time and labor to inspect all the reeds. In addition, such a method makes it difficult to find minute defects, and in particular, there is a difference in the uniformity of the reed spacing between the reeds and in the detection accuracy of the fall of the reeds between the skilled and unskilled persons, which makes a difference in the quality of the fabric. Cause it to occur.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method and an apparatus for inspecting a group of parallel blades capable of measuring the reed spacing between reeds and the reed feathers with high accuracy in a short time. It is an issue.

[0006]

An apparatus for inspecting a group of parallel blades according to the present invention, which has solved the above-mentioned problems, comprises a group of parallel blades 1.
, A sensor carrier 5 that relatively moves in a blade arrangement direction (weft insertion direction in the case of a reed) of the parallel blade group held by the holding table, and a first from rear to front of the parallel blade group. There are provided two pairs of light emitters 10 and 11 and light receivers 12 and 13 for projecting the laser light 8 and the second laser light 9. The light emitters 10, 11 and the light receivers 12, 13 are mounted on the sensor carrier 5, and the first laser light 8 and the second laser light 9 have different angles with respect to the axis of the parallel blade group in the blade arrangement direction. Projected at

The projection angles of the first and second laser beams are not particularly limited as long as the two laser beams are always transmitted between adjacent blades. 90 to the axis in the blade array direction
Projection at an angle of degrees and projecting the other with a slight inclination, or two laser beams are projected at an angle equal to the left and right with respect to a plane perpendicular to the axis of the parallel blade group in the blade arrangement direction. It is reasonable. The two laser beams are
A structure for irradiating the same point of the parallel blade group on the holding table is preferable in terms of signal processing and measurement accuracy.

Further, according to the inspection method for a parallel blade group of the present invention, the first and second laser beams 8, 9 having different projection angles with respect to the axis in the blade arrangement direction of the parallel blade group are projected toward each blade. The first and second laser beams are scanned at the same speed in the blade array direction of the parallel blade group while detecting the laser beam that has passed through the gap. While the scanning width 14 when the laser light is shielded by one blade during scanning and the light receiving width 15 when the laser light is detected, the arrangement interval and inclination of the blades are detected, and the first and second blades are detected. The direction in which the blade falls down is detected based on the difference between the light blocking width or the light receiving width of the laser light.

Since the laser beam can be projected as a very narrow beam of light, the laser beam is moved in the direction of the blade array of the parallel blade group, and the laser beam passing between the blades is detected by a photodetector or the like. Then, the laser beam is shielded at the portion where the blade exists, and the laser beam passes through and detected at the portion between the blades. Continuously over the entire blade array direction of the group,
And it can measure quickly. Since the thickness of the blade is known in advance, the inclination angle of the blade can be detected from the difference between the light blocking width 14 and the thickness of the blade. However, when measurement is performed using only one laser beam, it is not possible to detect in which direction the blade is tilted.

In the present invention, since the measurement is performed by projecting the first and second laser beams having different projection angles with respect to the axis of the parallel blade group in the blade arrangement direction, the first and second laser beams are shielded. Widths 14 and 14a (or light receiving widths 15 and 15)
From the difference in a), the direction of blade fall can be detected. For example, when the first laser beam 8 is projected at an angle of 90 degrees with respect to the axis of the parallel blade group in the blade arrangement direction, and the second laser beam 9 is projected at a slight angle, the first laser beam is blocked. If the light shielding width 14a of the second laser light is smaller than the width 14, it is understood that the blade is tilted in the irradiation direction of the second laser light. When there is no tilt, the light-blocking width of the second laser light becomes wider than the light-blocking width of the first laser light. Can be calculated.

There is no particular limitation on the angles at which the first and second laser beams are projected, but the angle range must be such that the laser beams must pass between adjacent blades. In terms of processing of the detected signal, a method of projecting one of the laser beams at 90 degrees to the axis of the parallel blade group in the blade array direction and projecting the other at a slight angle (see FIG. 2), It is advantageous to use a method in which the projection is performed at an angle equal to the left-right symmetry (see FIG. 6).

[0012]

FIG. 1 is a side view showing an embodiment of a parallel blade group inspection apparatus according to the present invention, showing an example of a reed inspection apparatus. The holding table 2 of the reed 1 is formed in a frame shape on the upper surface of a fixed frame 3, and the reed 1 is supported by the holding table 2 at upper and lower channel portions. Frame 3
Behind the lower part of the reed 1, two rails 4 are fixed in the width direction of the reed 1, and a sensor carrier 5 is provided movably along the rails. The sensor carrier 5 includes a lower portion 6 located below the holding table 2 and an upper portion 7 located above. The first laser beam 8 and the second laser beam passing through the reed 1 are located on the upper and lower portions. It comprises light emitters 10 and 11 for light 9 and light receivers 12 and 13.

In the illustrated embodiment, the first laser beam 8
Is projected at an angle of 90 degrees with respect to the vertical axis of the reed 1, and the second laser light 9 is substantially emitted in order to avoid interference between the light emitters 10 and 11 and the light receivers 12 and 13. The first laser beam 8 and the second laser beam 9 pass through the same position of the reed 1 at an angle of 30 degrees. FIG.
FIG. 4 is a front view showing a positional relationship between two light projectors 10 and 11 and light receivers 12 and 13 with respect to the width direction of the reed 1 (the left-right direction in FIG. 2). 9
The second laser light 9 is projected at an angle of 0 degree and is slightly inclined in the width direction of the reed.

When the sensor carrier 5 is moved while the first and second laser beams 8 and 9 are projected by the light projectors 10 and 11, the first laser beam receiver 12 is moved to the position shown in FIG. As shown in (b) and (c), a light-shielding width 14 and a light-receiving width 15 having a width corresponding to the fall of the reed and the interval are detected.
If the reed falls, the light-shielding width 14 becomes wider and the light-receiving width 1
5 narrows. The light-shielding width 14 when the reed feather does not fall down is
Equal to the thickness of the reed.

On the other hand, the photodetector 13 for receiving the second laser light 9 detects the light-shielding width 14a and the light-receiving width 15a as shown in FIG. 4 when passing through the same position of the reed. Therefore, the light-blocking width 14a of the second laser beam with respect to the same
By comparing the light-shielding width 14 of the laser light with the light-shielding width 14, it is possible to detect the direction of the fall of the reed. The falling angle of the reed can be calculated by a trigonometric formula based on the dimension obtained by subtracting the reed's thickness from the light-shielding width 14 of the first laser beam and the reed's width.

The sensor carrier 5 is moved at a constant speed using, for example, a ball screw, or a linear scale for detecting the movement stroke of the sensor carrier is provided. The reed spacing 16 and the reed feather fall 17 over the entire width of the reed 1
And the light-shielding widths 14 and 14a and the light-receiving width 1
5 and 15a, as shown in FIG. 5, it is possible to display or print, so that the finishing accuracy of the reed can be inspected with very high accuracy without requiring the skill of the operator, By correcting the interval and the inclination of the reed wings as necessary, it is possible to provide a highly accurate reed.

The above is an example of an apparatus for inspecting the arrangement of reeds of a reed used in a loom. The arrangement of many blades arranged in parallel, such as a rectifying blade for rectifying the flow of a fluid, is inspected. The present invention can be used in an apparatus for performing the above.

[Brief description of the drawings]

FIG. 1 is a side view schematically showing one embodiment of the apparatus of the present invention.

FIG. 2 is a front view showing irradiation directions of two laser beams in the width direction of the reed in the apparatus of FIG. 1;

FIG. 3 is an explanatory diagram showing a relationship between a reed feather falling down, a first laser beam receiving interval, and a light blocking width.

FIG. 4 is an explanatory diagram showing a light receiving interval and a light shielding width of a second laser beam.

FIG. 5 is a diagram schematically showing an example of a detection result.

FIG. 6 is a view similar to FIG. 2, showing an example in which a first laser beam and a second laser beam are symmetrically projected.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reed 2 Holder 5 Sensor carrier 8 1st laser beam 9 2nd laser beam 10,11 Projector 12,13 Receiver 14 Shielding width 15 Receiving width

Claims (3)

[Claims] 1. A holding table (2) for holding a group of parallel blades (1).
A sensor carrier (5) relatively moving in the blade array direction of the parallel blade group held by the holding table; and a first laser beam (8) and a second laser beam ( 9) and two pairs of projectors (10, 11) and a receiver
(12, 13), wherein the projector and the receiver are mounted on a sensor carrier (5), and the first laser light (8) and the second laser light (9) are arranged in a blade array direction of a parallel blade group. An inspection apparatus for a group of parallel blades, which is projected at different angles with respect to the axis of the blade. 2. An angle between the optical axis of the first laser beam (8) and the axis of the parallel blade group in the blade arrangement direction is 90 degrees, and the first laser beam (8) and the second laser beam are formed. The inspection device for a parallel blade group according to claim 1, characterized in that the (9) and (9) are irradiated to the same point of the parallel blade group held by the holding table (2). 3. The laser beam, which projects first and second laser beams (8, 9) having different projection angles with respect to the axis in the arrangement direction of the parallel blade group toward the parallel blade group, and passes between the blades. The first and second laser beams are scanned at the same speed in the blade array direction of the parallel blade group while detecting the laser beam, and the light shielding width (14) when the laser beam is blocked by the blade during the scanning and the laser beam Width when light is detected (15)
Detecting the interval and inclination of each blade by means of the above, and detecting the direction of inclination of the blade based on the difference between the light-blocking width or the light-receiving width of the first and second laser beams. .