JP2014190852A - Clothes inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the height dimension of a clothes inspection device combined with a folding machine.SOLUTION: A clothes inspection device is combined with a folding machine, and inspects abnormality such as dirt on the surface or inside of expanded clothes. The clothes inspection device includes: a conveyor conveying the expanded clothes; a camera photographing an image from above the clothes conveyed by the conveyor and outputting it; and a reflector arranged above the conveyor and bending an optical path between the expanded clothes and the camera.

Description

  The present invention relates to a cloth inspection apparatus for detecting abnormalities such as dirt or tears on the surface or inside of an expanded cloth carried out from an iron roller or the like in a cloth laundry factory or the like.

  In cloth washing factories, after washing cloths such as sheets and bedding covers used in hospitals and hotels, etc., they are stretched by a stretcher in a semi-dry state, sent to an iron roller, ironed, and a folding machine It is folded and supplied again to hospitals and hotels.

  Therefore, if there is an abnormality such as dirt or tear on the surface or inside of the cloth during the washing process, it is necessary to remove the cloth from the above-described normal washing processing line and separately process it. For this reason, the applicant of the present application has conventionally proposed, for example, one described in Patent Document 1 as a cloth inspection device for detecting abnormalities such as dirt or tear on the surface or inside of a cloth.

  This cloth inspection device inspects both the front and back surfaces of a cloth in combination with a folding machine arranged on the downstream side of the iron roller, and is used for the cloth conveyed on the first belt conveyor connected to the iron roller. Take a picture of the upward surface (usually the back side is facing the iron roller, so the back side when the iron roller comes out) with the first camera from the top, then from the end of the first belt conveyor to the bottom With the second belt conveyor facing each other, turn the cloth hanging from the end of the first belt conveyor over, and then transport the cloth sandwiched between the first belt conveyor and the second belt conveyor, During the delivery from the end of the second belt conveyor to the third belt conveyor, the other side of the cloth (usually the front side) is moved to the second camera. From the photographed, taken with these camera images, cloth for detecting the dirt, the dirt is detected on both surfaces of the textiles are excluded from the normal washing process line.

  And the folding machine combined with the cloth inspection device has a swing claw located under the terminal part of the third belt conveyor from the terminal part of the length of about 1/4 of the total length of the cloth. Of the cloth that hangs down along the back side facing the end portion of the cloth and then hangs down on the back side of the swinging claw with the lower end of the swinging claw as a shaft. Hold the 1/4 part between the fixed part and then hang down the part of the cloth about 1/2 length along the front of the swinging claw in a U shape. The upper end of the swing claw is swung between the fourth belt conveyor facing the lower end of the third belt conveyor and the third belt conveyor, and the third belt conveyor. Place the cloth on the upper end about 1/4 and 3/4 in the longitudinal direction of the third belt conveyor. The cloth which has been pushed in between the belt and the fourth belt conveyor and folded into a laterally folded state is sandwiched between the third belt conveyor and the fourth belt conveyor, and the fourth belt conveyor is conveyed. Delivered onto two fifth belt conveyors parallel to each other at the end of the belt conveyor, and the four folded fabrics transported on the two fifth belt conveyors are transferred to the two fifth belt conveyors. The pushing blades extending along the belt between the conveyors are lowered and pushed in between the belt conveyors while being folded in two vertically. Drain downward.

JP 2009-285109 A

  By the way, when the applicant of the present application has further studied the conventional cloth inspection apparatus, the conventional cloth inspection apparatus uses a first camera disposed above the first belt conveyor of the folding machine. In order to capture the entire width of a wide cloth such as a futon cover, the first camera is arranged in the width direction of the cloth and the entire width is shared by the two, but the first camera is still Since the first camera is supported by a post at a high position above the first belt conveyor, the overall height of the apparatus is large. As a result, it has been found that there is an inconvenience that the restrictions on the installation location are large.

This invention solves the problems of the conventional cloth inspection apparatus as described above, and the cloth inspection apparatus of this invention
In a cloth inspection device that is combined with a folding machine and inspects abnormalities such as dirt on the surface or inside of the expanded cloth,
A conveyor for conveying the spread fabric;
A camera that captures and outputs an image from above the cloth being conveyed by the conveyor;
A reflector disposed above the conveyor and bending a light path between the spread fabric and the camera;
It is characterized by comprising.

  In the cloth inspection apparatus according to the present invention, since the reflecting mirror bends the optical path between the cloth being conveyed by the conveyor and the camera that captures the image and outputs the image, the camera is high. A camera for photographing the entire width of the cloth can be arranged at a position away from the cloth without being supported by the support at the position. Therefore, according to the cloth inspection apparatus of the present invention, the height dimension of the entire apparatus can be reduced, so that restrictions on the installation location can be reduced.

  In the cloth inspection apparatus according to the present invention, the bending direction of the optical path by the reflecting mirror is the extending direction of the conveyor, and the camera is mounted with a camera frame extending from the vicinity of the reflecting mirror to the vicinity of the camera. And supporting at least two portions of the camera frame separated in the extending direction of the camera frame by a common column, and the angle formed between the incident light and the reflected light in the optical path is determined by the operation of the folding machine. It is preferable that the camera frame and the camera frame are set to angles that vibrate in the same direction. In this way, when the vibration generated by the operation of the folding claw of the folding machine is transmitted to the conveyor and the camera frame, the conveyor and the camera frame vibrate synchronously in the same direction. The camera shake with respect to the cloth can be reduced, and a clear image of the cloth can be obtained. In addition, since at least two portions of the camera frame that are spaced apart in the extending direction of the camera frame are supported by a common column, it is easy to incline the column so that the space above the conveyor is easily opened and the cloth on the conveyor is You can work on a kind.

  Here, if the angle (reflection angle) between the incident light and the reflected light in the optical path is set within a range of 40 degrees to 51 degrees, the conveyor and the camera frame can be vibrated in good synchronization. preferable.

  Further, it is preferable that the camera frame is supported by the common support column so as to be tiltable about an axis extending in parallel with the reflecting mirror. In this way, by performing an operation test at a position where the camera frame is tilted little by little, the angle formed by the incident light and the reflected light in the optical path is an angle at which the conveyor and the camera frame vibrate in synchronization with each other. Can be set easily.

It is a side view which shows the structure of one Example of the cloth inspection apparatus of this invention in the state combined with the folding machine. It is a side view which shows the part of the cloth inspection apparatus of the said Example. It is the arrow line view seen from the arrow A direction of FIG. 2 which shows one of the combination of the two reflecting mirrors of the cloth inspection apparatus of the said Example, two camera frames, and two cameras. It is explanatory drawing which expands and shows the reflective mirror periphery part of the cloth inspection apparatus of the said Example of the B section of FIG. (A), (b), and (c) are the front views, top views, and side views which show the camera peripheral part of the cloth inspection apparatus of the said Example of the C section of FIG. (A) And (b) is explanatory drawing which each shows the relationship between the structure of the cloth inspection apparatus of the said Example, and the vibration of a camera. (A)-(e) is explanatory drawing which shows the change of the image of a camera at the time of changing the structure of the cloth inspection apparatus of the said Example.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view showing the configuration of an embodiment of the cloth inspection apparatus according to the present invention combined with a folding machine, and FIG. 2 is a side view showing a portion of the cloth inspection apparatus of the above embodiment. In the figure, reference numeral 1 denotes a normal folding machine, and 2 denotes a cloth inspection apparatus of this embodiment combined with the folding machine 1. In the figure, motors for driving the conveyor belts of the respective belt conveyors are not shown.

  The cloth inspection apparatus 2 according to this embodiment is for inspecting cloth from one side in combination with the folding machine 1 arranged on the downstream side of the iron roller in a cloth laundry factory or the like. The first belt conveyor 3 of the folding machine 1 connected to an iron roller (not shown) located on the left side has an upward surface of the cloth S to be conveyed rightward as indicated by an arrow in FIG. The two video cameras 4 lined up in the width direction of 3 are photographed in half in the width direction of the cloth, and from the images photographed by these video cameras 4 by image processing, Abnormalities such as tears are detected, and cloths in which abnormalities such as dirt and tears are detected are automatically removed from the normal washing processing line by the folding machine 1 in the middle of conveyance.

  The folding machine 1 is a second belt conveyor 5 facing from the terminal end of the first belt conveyor 3 to the lower part, and reaches the terminal end of the first belt conveyor 3 and hangs the cloths hanging from there. After turning over, the cloth is sandwiched between the first belt conveyor 3 and the second belt conveyor 5 and conveyed to the left as shown by the arrow in FIG. 1, and then the end of the second belt conveyor 5. To a back surface of the swinging claw 6 located below the end portion of the cloth toward the side opposite to the end portion (left side in FIG. 1). The swinging claw 6 is swung to the back side (left side in FIG. 1) with the air cylinder 7 around the lower end of the swinging claw 6 as a shaft, and is approximately 1 / of the cloth hanging down to the back side. 4 is a fixing portion 13a provided on a body frame 13 to be described later. And then hang a substantially half length of the cloth along the front surface of the swinging claw 6 in a U-shape, and then the upper end of the swinging claw 6 is The air cylinder 7 is swung between the second belt conveyor 5 and the third belt conveyor 8 facing each other from the end to the bottom of the second belt conveyor 5, and the swinging claw 6 The position of about 1/4 and 3/4 in the longitudinal direction of the cloth hanging on the upper end of the belt is pushed between the lower part of the second belt conveyor 5 and the third belt conveyor 8, so that the cloth is folded into four sides. The resulting cloth is sandwiched between the second belt conveyor 5 and the third belt conveyor 8 and conveyed to the right as shown by arrows in FIG.

  Furthermore, this folding machine 1 delivers the cloths folded in the above-mentioned lateral state onto two fourth belt conveyors 9 parallel to each other connected to the terminal end of the third belt conveyor 8. In FIG. 1, four-fold cloths that are conveyed to the right as shown by arrows in FIG. 1 extend along and above the four fourth belt conveyors 9. The pushing blades 12 that are moved together with the cloth by the operation of the other belt conveyors 10 and are lowered by being urged by the air cylinder 11 are pushed in between the belt conveyors 9 while being folded in half. The cloths in the folded state are discharged below the fourth belt conveyor 9. The cloths are further folded by a similar folding mechanism (not shown) to be, for example, 32 folded, stacked by a stacker (not shown), and carried out by a conveyor (not shown).

  The folding machine 1 supports the belt conveyors 3, 5, 8, 9, 10 and the swing claws 6, the air cylinders 7, 11 and the pushing blade 12, as shown in the upper part of FIG. The cloth inspection apparatus 2 of this embodiment has a substantially rectangular parallelepiped frame-like main body frame 13 that also supports other folding mechanisms. The cloth inspection apparatus 2 of this embodiment has two lower ends pivotally supported on the upper end of the main body frame 13. A gate-shaped photographic frame 14 in which two intermediate struts (not shown) arranged in parallel with the outer struts and the outer struts are connected by a girder extending in the width direction of the first belt conveyor 3; The lighting brackets 15 fixed to the iron roller side (leftward in FIG. 2) surfaces of the two outer supports of the photographing frame 14, and both ends supported by the lighting brackets 15 are the first. Belt Two lighting units 16 that are arranged side by side in the extending direction of the conveyor 3 and that extend in the width direction of the first belt conveyor 3 to illuminate the cloth on the belt conveyor, and a photographing frame A main camera support member 17 which is fixed above the iron roller side (left side in FIG. 2) of the two outer struts 14 and the two intermediate struts 14 and located above the illumination bracket 15; A secondary camera support member 18 fixed to the opposite side of the iron roller side of the two outer support columns and the two intermediate support columns (toward the right in FIG. 2). Note that the lower ends of the front ends of both illumination brackets 15 are detachably fixed to the main body frame 13 with bolts, whereby the photographing frame 14 stands up across the first belt conveyor 3 in the width direction. In addition, it is possible to tilt rightward in FIG. 2 by removing the bolt.

  FIG. 3 is an arrow view as seen from the direction of arrow A in FIG. 2, showing one of a pair of two reflectors, two camera frames, and two cameras of the cloth inspection apparatus of this embodiment. FIG. 2 is an explanatory view showing, in an enlarged manner, the reflection mirror peripheral portion of the cloth inspection apparatus of the above-described embodiment, which is shown in FIG. 2B. Reflector brackets 20 are mounted on the main camera support members 17 fixed to the intermediate struts via anti-vibration rubbers 19 in the illustrated example, and the first belt is attached to these reflector brackets 20. Via two support shafts 21 extending horizontally in the width direction of the conveyor 3 and positioned on the same axis line, between one outer column and the adjacent intermediate column and adjacent to the other outer column Two so that each is located between the middle struts The projecting mirror unit 22 is supported, and these two reflecting mirror units 22 are directed obliquely downward (in the diagonally downward direction in FIG. 2) in the extending direction of the first belt conveyor 3, and the first belt conveyor 3. It has a reflecting mirror 23 extending in the width direction, and is fixed to the reflecting mirror bracket 20 so that its inclination angle can be changed around the support shaft 21.

  In the illustrated example, two arm members 24 and one intermediate member 25 are connected to each of the two support shafts 21 of each reflector unit 22 by three girder members 26 to form a camera frame. The distal end portions of the two arm members 24 are also supported so as to be rotatable around their support shafts, and the intermediate portion of the two arm portions 24 of the camera frame 27 is prevented by the connecting member 28 and the illustrated example. The camera frame 27 is supported by two sub-camera support members 18 via vibration rubbers 29, whereby the camera frame 27 is supported at two locations in the extending direction by a common outer support column that can tilt on the main body frame 13. A camera mount 30 is disposed on the beam portion 25 of the camera frame 27 farthest from the reflecting mirror unit 22.

  5A, 5B, and 5C are a front view, a plan view, and a side view showing a camera peripheral portion including the camera mount 30 in the portion C of FIG. 2, and the front view is shown in the illustrated example. On the substantially L-shaped camera mount 30, the video camera 4 described above is mounted toward the reflecting mirror unit 22, and the camera mount 30 is a combination of three members, and the front view is substantially omitted in the illustrated example. Through a U-shaped camera bracket 31 having a substantially L shape in a plan view and a side view, and a reinforcing member 32 having a substantially triangular shape in a side view, the girder portion 25 is attached so that the inclination angle can be changed.

  As a result, the two video cameras 4 reach the reflecting mirror 23 in the reflecting mirror unit 22 from the video cameras 4, and are refracted at an acute angle by the reflecting mirror 23 and extend vertically through the gap between the two lighting units 16. The cloth piece crossing the optical path LP is repeatedly photographed in a straight line in the width direction of the first belt conveyor 3 through the optical path LP to the first belt conveyor 3, and an image processing device (not shown) A linear image of the video camera 4 is connected in the width direction and the movement direction of the cloth to generate a two-dimensional image of the cloth. Here, the first belt conveyor 3 includes a plurality of conveyor belts arranged with a gap therebetween in the width direction, a guide plate 33 rising obliquely from the gap between the conveyor belts, and the first belt conveyor 3 connected thereto. And an inspection plate 34 that is coated in black and white or three primary colors across the width direction of the belt conveyor 3 and is conveyed by the first belt conveyor 3, It rides on the guide plate 33 and passes over the inspection plate 34, whereby an abnormal part such as dirt or tear is photographed with clear contrast due to reflection from the inspection plate 34. In addition, as a method for detecting abnormalities such as cloth stains and tears by performing image processing on an image captured by a camera, for example, the method disclosed by the applicant of the present application in Japanese Patent Application Laid-Open No. 2008-256402 and other suitable publicly known methods This method can be used.

  Therefore, according to the cloth inspection apparatus of this embodiment, the reflecting mirror 23 of the reflecting mirror unit 22 captures the cloth conveyed by the first belt conveyor 3 and the video camera 4 that outputs the image. Since the optical path LP between the two is bent, the video camera 4 for photographing the entire width of the cloth is arranged at a position away from the cloth without the video camera 4 being supported by the support column 14 at a high position. can do. Therefore, according to the cloth inspection apparatus of this embodiment, since the height dimension of the entire apparatus can be reduced, restrictions on the installation place can be reduced.

  By the way, in the folding machine 1, vibration is generated by swinging of the swinging claw 6 and raising / lowering of the pushing blade 10, particularly swinging of the swinging claw 6, and the vibration is transmitted from the main body frame 13 to the first belt conveyor 3. And is transmitted to the video camera 4 through the two outer columns of the gate-shaped photographing frame 14 and the camera frame 27, and the first belt conveyor 3 and the cloths on the conveyor belt, the video The camera 4 vibrates. If the directions, magnitudes and timings of the vibrations are different from each other, the video camera 4 vibrates relative to the first belt conveyor 3, causing camera shake in the photographed cloth image, resulting in a clear image. It becomes difficult to get.

  Therefore, the inventor variously changes the configuration of the cloth inspection device, photographs the cloth being conveyed by the first belt conveyor 3 with the video camera 4 during the operation of the folding machine 1, and detects the cloth. The test was performed by measuring the R-square value of the magnitude of the outline shake with respect to the approximate curve (the order is small) of the outline at the side edge of the image as the vibration value, and evaluating the vibration value. Therefore, in this test, the closer the vibration value is to 1.000, the smaller the vibration, that is, the less the camera shake, and the clearer the image. Each of the vibration directions described above is three-dimensional. In this test, the vibration value in the width direction of the first belt conveyor 3 is measured from the image of the video camera 4, and the vibration value is evaluated. doing.

The test results are shown in Table 1 below and FIGS. 6 (a) and 6 (b).

  In the above test, as shown in the upper part of FIG. 1, a gate-type shooting frame 14 ′ having a high column is used, and first, one video camera 4 ′ is supported at a high position of the shooting frame 14 ′. The structure (standard attachment) of the cloth inspection apparatus is used, and the camera frame 27 is supported at a low position corresponding to the above-described embodiment of the photographing frame 14 ′, and the other video camera 4 is supported by the camera frame 27. And it was set as the structure (reflective attachment) similar to the cloth inspection apparatus of the said Example. Further, the anti-vibration rubbers 19 and 29 are used to support the camera frame 27 as shown in FIG. 2, and the anti-vibration rubbers 19 and 28 are soft and the reflection angle θ is set to 78 degrees (camera frame 27 Is nearly horizontal). Then, when trying to compare the vibration values with the images of the video cameras 4 and 4 ′, the vibration isolating rubber 29 is greatly deformed in the configuration of the cloth inspection apparatus of the above embodiment, and the camera frame 27 is firmly supported. could not.

  Therefore, when the anti-vibration rubbers 19 and 29 were replaced with hard ones while maintaining the reflection angle θ at 78 degrees, the camera frames 27 were firmly supported. The vibration value was measured twice using the anti-vibration rubbers 19 and 29, respectively. Further, the reinforcing member 32 is not used in the group a, but the camera mount 30 is fixed to the girder portion 25 via the camera bracket 31 and the reinforcing member 32 after the group b. Next, in the group c and later, the anti-vibration rubber 19 is removed to support the reflector bracket 20 on the main camera support member 17 and the anti-vibration rubber 29 is removed to support the connecting member 28 on the sub camera support member 18. The measurement was performed seven times while maintaining the reflection angle θ at 78 degrees.

  In the first four measurements of the next group d, the reflection angle θ was set to 40 degrees by changing the inclination of the reflector unit 22 and changing the inclination of the camera frame 27. As a result, the vibration value is very close to 1.000, and camera shake is almost eliminated. Therefore, in the latter four measurements of the group d, the other video camera 4 ′ also has the configuration of the cloth inspection apparatus of the above embodiment. As (reflective mounting), the cloth was photographed with the optical path LP supported by the camera frame 27 and bent by the reflecting mirror 23 of the reflecting mirror unit 22.

  In subsequent groups e, f, and g, the inclination of the reflector unit 22 is changed and the inclination of the camera frame 27 is changed so that the reflection angle θ is 51 degrees (group e), 62 degrees (group f), and 46 degrees. Each (group g) was set, and measurement was performed 5 times. 7 shows images of the video cameras 4 and 4 ′ obtained by these measurements. FIG. 7A shows the video camera 4 ′ attached as standard, FIG. 7B shows the video camera 4 of group a, and FIG. 7C is an image of the video camera 4 of the group b, FIG. 7D is an image of the video camera 4 of the group c, and FIG. 7E is an image of the video camera 4 of the group d. The border between the black part and the black part indicates the outline of the side edge of the cloth. The larger the contour wave, the greater the camera shake.

  From the result of this test, when the reflection angle θ is changed, the variation of the vibration value changes. In the configuration of the above embodiment, the group d in which the reflection angle θ is set to 40 degrees is closest to 1.000. It was found that the groups g and e set at 46 degrees and 51 degrees were close to 1.000 next to the group d. This is because when the reflection angle θ is made smaller, the center of gravity of the entire cloth inspection apparatus above the photographing frame 14 is moved more toward the ironing roller side with respect to the photographing frame 14 and the entire cloth inspection apparatus is moved. And the cloth inspection device and the first belt conveyor 3 are more integrated, and are generated by the operation of the folding machine 1, particularly the operation of the swinging claw 6, and are first from the main body frame 13. The direction and magnitude of the vibration transmitted to the belt conveyor 3 and the direction and magnitude of the vibration transmitted from the main body frame 13 to the video cameras 4 and 4 ′ via the photographing frame 14 and the camera frame 27 are better matched. The timing of the vibrations transmitted to the first belt conveyor 3 and the vibrations transmitted to the video cameras 4 and 4 'are better synchronized. It is believed that became.

  Therefore, according to the cloth inspection apparatus 2 of this embodiment, when the vibration generated by the operation of the folding claw 6 of the folding machine 1 is transmitted to the first belt conveyor 3 and the camera frame 27, they are mutually connected. Since it vibrates synchronously in the same direction, the shake of the video camera 4 with respect to the cloth on the first belt conveyor 3 can be reduced and substantially eliminated, and a clear image of the cloth can be obtained. In addition, since the camera frame 27 is spaced apart in the extending direction of the camera frame 27 and is supported by the common outer column of the photographing frame 14, the first belt conveyor 3 can be easily tilted. It is possible to work on the cloths on the first belt conveyor 3 by leaving a space above the upper part of the belt, or to replace the fluorescent lamps of the two lighting units 16 with new ones.

  Furthermore, according to the cloth inspection apparatus 2 of this embodiment, the angle (reflection angle) formed by the incident light and the reflected light on the optical path LP is within a range from 40 degrees to 51 degrees (groups d, e, g), In particular, by setting the angle to 40 degrees (group d), the first belt conveyor 3 and the camera frame 27 can be vibrated in good synchronization, and camera shake can be well prevented.

  Further, according to the cloth inspection apparatus 2 of this embodiment, the camera frame 27 can be tilted around the support shaft 21 having an axis extending in parallel with the reflecting mirror unit 22 with the common outer column of the photographing frame 14. Since the operation is tested as described above at the position where the camera frame 27 is tilted little by little, the angle formed by the incident light on the optical path and the reflected light (reflection angle) is the first belt conveyor. 3 and the camera frame 27 can be easily set to an angle at which they vibrate in synchronization with each other.

  Although the present invention has been described based on the illustrated examples, the present invention is not limited to the above-described examples and can be appropriately changed within the scope of the claims. For example, in the above-described embodiments, the entire width of the cloth However, the two video cameras 4 supported by two camera frames 27 may be shared, and the two video cameras 4 may be supported together by one camera frame 27. Depending on the width of the field of view of the camera 4 and the width of the cloth to be handled, the entire width of the cloth may be taken by one video camera 4.

  Further, in the above embodiment, the photographing frame 14 having the support column is formed in a gate shape and the camera frame 27 is formed in a frame shape, but the support column and the camera frame are not limited to these, and may have other configurations. In addition, in the above embodiment, the video camera 4 inspects only from one side of the cloth. However, another video camera may inspect from the opposite side of the cloth. .

  Thus, according to the cloth inspection apparatus of the present invention, the reflecting mirror bends the optical path between the cloth being conveyed by the conveyor and the camera that captures the image and outputs the image. Even if it is not supported by a column, the camera for photographing the entire width of the cloth can be placed at a position away from the cloth, thereby reducing the overall height of the apparatus, so that the installation location Can be reduced.

DESCRIPTION OF SYMBOLS 1 Folding machine 2 Cloth inspection apparatus 3 1st belt conveyor 4 Video camera 5 2nd belt conveyor 6 Swing claw 7 Air cylinder 8 3rd belt conveyor 9 4th belt conveyor 10 Other belt conveyors 11 Air cylinder DESCRIPTION OF SYMBOLS 12 Push blade 13 Main body frame 13a Fixed part 14 Shooting frame 15 Illumination bracket 16 Illumination unit 17 Main camera support member 18 Sub camera support member 19 Anti-vibration rubber 20 Reflector bracket 21 Support shaft 22 Reflector unit 23 Reflector 24 Arm material 25 Intermediate material 26 Girder material 27 Camera frame 28 Connecting member 29 Anti-vibration rubber 30 Camera mount 31 Camera bracket 32 Reinforcement member 33 Guide plate 34 Inspection plate LP Optical path θ Reflection angle S Cloth

Claims (4)

In a cloth inspection device that is combined with a folding machine and inspects abnormalities such as dirt on the surface or inside of the expanded cloth,
A conveyor for conveying the spread fabric;
A camera that captures and outputs an image from above the cloth being conveyed by the conveyor;
A reflector disposed above the conveyor and bending a light path between the spread fabric and the camera;
A cloth inspection device characterized by comprising: While the bending direction of the optical path by the reflecting mirror is the extending direction of the conveyor,
Supporting the camera with a camera frame extending from near the reflector to near the camera;
Supporting at least two locations of the camera frame spaced apart in the extending direction of the camera frame with a common support;
The angle between the incident light and the reflected light in the optical path is set to an angle at which the conveyor and the camera frame vibrate synchronously in the same direction by the operation of the folding machine. The cloth inspection device described.   The cloth inspection apparatus according to claim 1 or 2, wherein an angle formed by incident light and reflected light in the optical path is set within a range of 40 degrees to 51 degrees.   The cloth inspection apparatus according to any one of claims 1 to 3, wherein the camera frame is supported by the common column so as to be tiltable about an axis extending in parallel with the reflecting mirror. .

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