JP2014112035A - Cloth inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cloth inspection device having an inspection capacity higher than as in the past.SOLUTION: The cloth inspection device for inspecting the anomaly such as a stain of the surface or the inner part of a spread cloth includes: a delivery conveyor and a receiving conveyor which convey the spread cloth, respectively; jump means for making the spread cloth jump from the delivery conveyor to the receiving conveyor; and a camera for imaging the cloth and outputting the image thereof by at least a light beam having transmitted the cloth from among a light beam from a light source radiated on the spread cloth having jumped a gap between the delivery conveyor and the receiving conveyor and transmitted the spread cloth, and a light beam reflected from the cloth.

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 apparatus includes four belt conveyors arranged between an ironing roller and a folding machine, and the second belt conveyor is directed to the first belt conveyor connected to the ironing roller. In addition, by turning the first belt conveyor up to the upper side of the second belt conveyor, the cloth on the first belt conveyor is sandwiched between them and turned over. I put it on the conveyor and photographed the surface of the cloth turned upside down with the first camera.

  In this apparatus, the second belt conveyor is faced to the third belt conveyor, and the second belt conveyor is turned up to the upper side of the third belt conveyor, thereby the second belt conveyor. The cloth placed on the conveyor is put between them, turned over, placed on the third belt conveyor, and the turned-up cloth transferred from the third belt conveyor to the fourth belt conveyor toward the folding machine. The surface of the cloth is photographed with the following cameras, and dirt on both surfaces of the cloth is detected from the images photographed with these two cameras, and the cloth on which the dirt is detected is detected from the normal washing processing line. Eliminated.

JP 2004-177143 A

  By the way, when the applicant of the present application further researched on the conventional cloth inspection apparatus, the conventional cloth inspection apparatus can inspect both sides of the cloth, In addition to abnormalities such as tearing, it has been found that abnormalities such as dirt on the surface of the same color as the cloth cannot be detected sufficiently. In order to solve this problem, it is conceivable that the cloth is passed through a transparent table and inspected with transmitted light. However, this method deteriorates the inspection capability due to dirt or scratches on the transparent table. There was a problem that it was easy. Therefore, in recent years, it has been desired to develop a cloth inspection apparatus having a higher inspection ability.

This invention solves the problems of the conventional cloth inspection apparatus as described above, and the cloth inspection apparatus of this invention
In cloth inspection equipment that inspects abnormalities such as dirt on the surface or inside of expanded cloth,
A delivery conveyor and a delivery conveyor for respectively conveying the spread fabric;
Jumping means for jumping the cloth spread from the sending conveyor to the receiving conveyor;
At least the light transmitted from the light source to the expanded cloth jumping through the gap between the delivery conveyor and the receiving conveyor and transmitted through the cloth, and at least the light reflected from the cloth A camera that shoots the cloth with light transmitted through the cloth and outputs an image;
It is characterized by comprising.

  In the cloth inspection apparatus according to the present invention, the jump means causes the spread cloth to jump from the delivery conveyor that conveys the spread cloth to the reception conveyor, and the feeding conveyor and the receiving conveyor. The light that has been spread from the light source to the spread cloth that is jumping through the gap between the light and the light that has passed through the cloth and the light that has been reflected from the cloth has been transmitted by at least the light that has passed through the cloth. The cloth is photographed by a camera and an image is output.

  Therefore, according to the cloth inspection apparatus of the present invention, the spread cloth jumping by the jump means in the gap between the sending conveyor and the receiving conveyor is irradiated from the light source and transmitted through the cloth. Because the cloth spread can be inspected based on the image output from the camera that has photographed the cloth with the light reflected from the cloth at least through the light transmitted through the cloth. Ability to detect abnormalities such as stains and tears inside the fabric as well as abnormalities such as stains on the surface of the same color as the fabric, and passing the fabric on a transparent table Since the inspection is not performed with transmitted light, the inspection ability is not deteriorated due to dirt or scratches on the transparent table, and the high inspection ability can be maintained for a long time.

  The cloth inspection apparatus according to the present invention further includes a camera that shoots the cloth with light reflected from the surface of the cloth and outputs an image by irradiating the spread cloth with a light source. It is preferable that even near-transparent dirt that is transmitted by transmitted light can be detected on the basis of the image output from the further camera, so that a higher inspection capability can be exhibited.

  Moreover, in the cloth inspection apparatus of this invention, the said jump means is provided in the sending side edge part of the said delivery conveyor toward the receiving side edge part of the said receiving conveyor, and the said expanded cloth is seen from the bottom. It is preferable to have a jump base that supports and spreads the expanded fabric from the tip, since the expanded fabric can be jumped with a simple and inexpensive configuration.

  Furthermore, in the cloth inspection apparatus according to the present invention, the jump means is provided at the receiving end of the receiving conveyor toward the jump base, and receives the expanded cloth jumped from the jump base. It is preferable to have a receiving table that is handed over to the receiving conveyor because the receiving conveyor can receive and convey the cloth spread more securely without dropping.

  And in the cloth inspection apparatus of this invention, the said cradle is a cloth penetration inspection position which leaves the predetermined space | interval of the horizontal direction between the said jump stand, and the said jump stand more than the cloth transmission inspection position. If it is possible to move between approaching cloth fall prevention positions, inspection with transmitted light, such as oil cloth, is unnecessary, and the transport speed is slow. It is preferable because it is possible to prevent the cloth from jumping from the jump stand and falling from the gap between the jump stand and the cradle because the speed is low and the cloth cannot jump sufficiently.

It is a side view which shows the structure of one Example of the cloth inspection apparatus of this invention. It is explanatory drawing which expands and shows the A section of the cloth inspection apparatus of the said Example. (A) And (b) is the top view and side view which show the structure of the jump stand and cradle of the cloth inspection apparatus of the said Example. It is explanatory drawing which shows the function of the jump stand and cradle of the cloth inspection apparatus of the said Example. It is explanatory drawing which shows operation | movement when there is no said jump stand. It is explanatory drawing which shows operation | movement when there is no said cradle. It is explanatory drawing which shows the structure and function of a modification 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. Here, FIG. 1 is a side view showing the configuration of one embodiment of the cloth inspection apparatus of the present invention, FIG. 2 is an explanatory view showing an enlarged A portion of the cloth inspection apparatus of the embodiment, and 3 (a) and 3 (b) are a plan view and a side view showing the configuration of the jumping table and the receiving table of the cloth inspection apparatus of the above embodiment, where reference numeral 1 denotes a normal ironing roller, 2 Is a normal folding machine, and 3 is a cloth inspection apparatus of this embodiment.

  The cloth inspection apparatus 3 of this embodiment is also disposed between the ironing roller 1 and the folding machine 2 in a cloth washing factory or the like, and is carried out of the ironing roller 1 and conveyed to the folding machine 2 during the washing process. The cloth inspection apparatus 3 in this embodiment is a frame-like support frame 4 having side plates on both sides, and a support frame 4 for detecting abnormalities such as dirt or tear on the surface or inside of the cloth F. In FIG. 1, a delivery conveyor 5 is provided on the left side and receives the expanded fabric F carried out from the ironing roller 1 and transports it to the right in FIG. A receiving conveyor 6 which is provided on the right side and which conveys the spread fabric F fed from the feeding conveyor 5 to the right in FIG. 1 and delivers it from the folding machine 2 to the loading conveyor 2a protruding forward. , To jump the spread was cloth F from the conveyor 5 feeding the to the receiving conveyor 6, which comprises a jump 7 and cradle 8 of the jump means.

  Here, as shown in the plan view of FIG. 3 (a), each of the delivery conveyor 5 and the reception conveyor 6 has a narrow conveyor belt 9 arranged side by side with a gap therebetween, The base 7 is shown in an enlarged manner in FIG. 2 and as shown in the plan view and the side view of FIGS. 3A and 3B, it protrudes from the delivery side end (right end in FIG. 1) of the delivery conveyor 5. The jump stand 7 includes a comb-like portion 7a projecting a large number of support portions from a gap of the conveyor belt 9 toward a receiving side end portion (left end portion in FIG. 1) of the receiving conveyor 6, and a feeding conveyor. 5 has a connecting portion 7b that extends in a horizontal direction orthogonal to the extending direction 5 (a direction orthogonal to the paper surface in FIG. 1) and connects the tips of the support portions of the comb-like portion 7a.

  Here, the cradle 8 is also shown in an enlarged view in FIG. 2 and, as shown in the plan view and the side view of FIGS. 3 (a) and 3 (b), the receiving side end of the receiving conveyor 6 (FIG. 1). In this case, the cradle 8 protrudes from the gap of the conveyor belt 9 toward the delivery side end (the right end in FIG. 1) of the delivery conveyor 5 and supports the support. The comb-shaped member which connected the front-end | tips by the connection part similar to the connection part 7b is provided. A gap G is provided in the horizontal direction between the tip of the jump base 7 and the tip of the cradle 8, and a slight height difference is also provided in the vertical direction. It is located slightly higher than the tip of the base 8.

  Further, the cloth inspection apparatus 3 of this embodiment is arranged by being arranged near the sending conveyor 5 and the receiving conveyor 6 obliquely below the gap G, and the LED 10 as the transmission light source arranged obliquely above the gap G. LED 11 as a reflected light source, a video camera 13 as a camera attached to a side of the support frame 4 on the receiving conveyor 6 side via a bracket 12, and a reflection disposed at the center in the support frame 4 The optical axis L1 of the video camera 13 passes through the gap between the LEDs 11 and the gap G via the reflecting mirror 14 and is directed to the LED 10 as a transmission light source.

  Furthermore, the cloth inspection apparatus 3 of this embodiment is arranged on the delivery conveyor 5 so as to extend in a horizontal direction perpendicular to the extension direction of the delivery conveyor 5 (in the direction perpendicular to the paper surface in FIG. 1). A blackboard 15 as a dark portion supported by a support member protruding from the gap of the conveyor belt 9 and a comb protruding upstream of the blackboard 15 in order to move the expanded fabric F on the blackboard 15 Attached to the upper portion of the support frame 4 via brackets 18 are LED-like members 16, LEDs 17 serving as other reflection light sources arranged obliquely above the blackboard 15 and close to the sending conveyor 5 and the receiving conveyor 6. A video camera 19 as a further camera, and the optical axis L2 of the video camera 19 passes between the LEDs 17 and is directed to the blackboard 15.

  In the fabric inspection apparatus 3 of this embodiment having such a configuration, the jump base 7 supports the expanded fabric F from below as shown on the left side of FIG. As shown in the right side of FIG. 4, the delivery cloth F is made to jump, and the spread cloth F jumped from the jump stand 7 is received and delivered to the reception conveyor 6 as shown in the right side of FIG. 5, the spread fabric F is jumped from the delivery conveyor 5 to the receiving conveyor 6, while the spread fabric F is jumping through the gap G between the delivery conveyor 5 and the receiving conveyor 6 as shown in FIG. 2. Light transmitted from the transmission light source 10 and transmitted through the cloth F, and light spread from the reflection light source 11 and reflected from the cloth F to the expanded cloth F jumping through the gap G. By both Was the cloth F camcorder 13 is taken to output the image of the cloth F.

  Therefore, according to the cloth inspection apparatus 3 of this embodiment, the spread cloth F jumping through the gap G between the sending conveyor 5 and the receiving conveyor 6 is irradiated from the transmission light source 10 to the cloth F. A video camera that captures the cloth F by both the light transmitted through F and the light reflected from the cloth F irradiated from the reflection light source 11 to the expanded cloth F jumping through the gap G Since the lower surface and the inside of the cloth F can be inspected in an enlarged view of the cloth F by an ordinary image processing apparatus or the like based on the image output from the cloth 13, the inside of the cloth F can be obtained with high inspection ability. In addition to abnormalities such as stains and tears on the fabric, abnormalities such as stains on the surface of the same color as the fabric F can be sufficiently detected, and the fabric F is passed through a transparent table and inspected with transmitted light. Do not do the dirt and scratches on the transparent base Since there is no fact that the inspection capacity decreases due like, can be maintained for a long time its high inspection capability.

  Further, according to the cloth inspection apparatus 3 of this embodiment, the cloth F taken on the delivery conveyor 5 is photographed by the light irradiated from the reflection light source 17 and reflected from the surface of the cloth F. Since the video camera 17 is further provided to output an image, even in the case of the cloth F which has been expanded, even on the lower and upper surfaces, even near transparent stains which are transmitted by transmitted light, etc. Since it can be detected by a normal image processing device or the like based on the images output from the two video cameras 13 and 19, respectively, higher inspection capability can be exhibited.

  Furthermore, according to the cloth inspection apparatus 3 of this embodiment, the jump means is provided at the sending side end portion of the sending conveyor 5 toward the receiving side end portion of the receiving conveyor 6, and the spread cloth F is provided. Since it has the jump stand 7 which supports from the bottom and jumps the expanded fabric F from the tip, the expanded fabric F can be jumped with a simple and inexpensive configuration.

  As shown on the left side of FIG. 5, when there is no jumping base 7, as shown on the right side of FIG. The cloth F, such as a heavy sheet, is wound down on the lower end of the delivery conveyor 5 without being peeled off from the conveyor belt, and the sheet F or the sheet attached with the string is attached. In the case of the fabric F, the string-like portion is caught at the tip of the delivery conveyor 5, and in any case, when the feeding speed of the delivery conveyor 5 is low, the reception conveyor 6 may not be jumped.

  On the other hand, as shown in FIG. 6, even when there is no cradle 8, if the tip of the jump pedestal 7 is sufficiently higher than the receiving side end of the receiving conveyor 6, the above-described fabrics can be used even if the feeding speed of the feeding conveyor 5 is slow. There is a high possibility that F can jump to the receiving conveyor 6.

  Furthermore, according to the cloth inspection apparatus 3 of this embodiment, the jumping means is provided at the receiving end of the receiving conveyor 6 toward the jumping base 7 and the expanded cloth jumping from the jumping base 7 is provided. Since it has the receiving stand 8 which receives F and delivers to the receiving conveyor 6, it can receive and convey more reliably the cloth F which the receiving conveyor 6 was expanded without dropping.

  FIG. 7 is an explanatory view showing the configuration and function of a modified example of the cloth inspection apparatus of the above embodiment. In the cloth inspection apparatus 3 of this modification, the receiving side end of the receiving conveyor 6 is shown in the figure. As shown by the arrows, it can move toward and away from the delivery side end of the delivery conveyor 5 so that the cradle 8 is spaced apart from the jump pedestal 7 in the horizontal direction on the right side of FIG. It is possible to move between the cloth penetration inspection position shown and the cloth fall prevention position shown in FIG. 7 closer to the jump stand 7 than the cloth transmission inspection position.

  Therefore, according to the cloth inspection apparatus 3 of this modified example, when the cloth cloth is not required to be inspected by transmitted light, and the conveyance speed is slow and soft cloth is conveyed, the feeding speed of the delivery conveyor 5 is increased. It is possible to prevent the cloth F from falling from the gap between the jump base 7 and the cradle 8 without being able to sufficiently jump from the jump base 7 at a later time.

  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 embodiment, the upper side of the delivery conveyor 5 In addition, a further video camera 17 is provided which shoots the cloth with light reflected from the surface of the cloth F by being irradiated from the reflection light source 17 to the spread cloth F and outputs an image. Alternatively or additionally, a similar video camera 17 may be provided above the receiving conveyor 6.

  Further, in the above-described embodiment, the video camera 13 jumps not only the light transmitted from the transmission light source 10 above the spread fabric F jumping through the gap G and transmitted through the fabric F, but also jumps through the gap G. The cloth F is also photographed by the light reflected from the cloth F that is irradiated from the reflected light source 11 below the gap G to the spread cloth F that is spread. The cloth F may be photographed only with the light irradiated from 10 and transmitted through the cloth F, and the transmission light source 10 is arranged below the gap G and the video camera 13 is arranged above the gap G. You may make it do.

  And in the said Example, although the two belt conveyors of the sending conveyor 5 and the receiving conveyor 6 are provided, the cloth inspection apparatus of this invention is not restricted to this, You may provide more conveyors, Alternatively, two portions of one belt conveyor may be configured as the delivery conveyor 5 and the reception conveyor 6. Further, the jumping means in the cloth inspection apparatus of the present invention may be appropriately changed in shape and configuration from the jumping base 7 in the above embodiment as required, and the receiving base 8 can be omitted.

  Thus, according to the cloth inspection apparatus of the present invention, the light that has been irradiated from the light source to the spread cloth jumping by the jump means through the gap between the sending conveyor and the receiving conveyor and transmitted through the cloth, High inspection capability because the spread fabric can be inspected based on the image output by the camera that captured the fabric with at least the light reflected from the fabric and transmitted through the fabric In addition to abnormalities such as stains and tears inside the cloth, it is possible to detect abnormalities such as dirt on the surface of the same color as the cloth, and the cloth can be passed through a transparent table. Since the inspection is not performed with the transmitted light, the inspection ability is not deteriorated due to dirt or scratches on the transparent table, and the high inspection ability can be maintained for a long time.

DESCRIPTION OF SYMBOLS 1 Ironing roller 2 Folding machine 3 Cloth inspection apparatus 4 Support frame 5 Sending conveyor 6 Receiving conveyor 7 Jump stand 7a Comb portion 7b Connecting portion 8 Receiving stand 9 Conveyor belt 10, 11, 17 LED
12, 18 Bracket 13, 19 Video camera 14 Reflector 15 Blackboard 16 Comb-shaped member F Cloth L1, L2 Optical axis

Claims (5)

In cloth inspection equipment that inspects abnormalities such as dirt on the surface or inside of expanded cloth,
A delivery conveyor and a delivery conveyor for respectively conveying the spread fabric;
Jumping means for jumping the cloth spread from the sending conveyor to the receiving conveyor;
At least the light transmitted from the light source to the expanded cloth jumping through the gap between the delivery conveyor and the receiving conveyor and transmitted through the cloth, and at least the light reflected from the cloth A camera that shoots the cloth with light transmitted through the cloth and outputs an image;
A cloth inspection device characterized by comprising:   2. The camera according to claim 1, further comprising: a camera that shoots the cloth with light emitted from a light source and reflected from a surface of the cloth and outputs an image. Cloth inspection device.   The jump means is provided at the sending side end of the sending conveyor toward the receiving side end of the receiving conveyor, supports the spread cloth from below, and spreads the cloth from the tip. The cloth inspection apparatus according to claim 1, further comprising a jumping base for jumping.   The jump means has a receiving table provided at the receiving end of the receiving conveyor toward the jumping table, and receives the expanded fabric jumped from the jumping table and delivers it to the receiving conveyor. The cloth inspection apparatus according to claim 3, wherein   The cradle moves between a cloth permeation inspection position with a predetermined horizontal interval between the cradle and the cloth fall prevention position closer to the jump base than the cloth permeation inspection position. The cloth inspection device according to claim 4, wherein the cloth inspection device is made possible.

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