Abnormality detection device for loom

Abstract

Provided is a loom abnormality detection device capable of keeping the shooting range of a camera constant. An abnormality detection device (20) for a loom is provided with: a camera (21); a detection unit that detects an abnormality in the loom or weaving on the basis of a captured image captured by the camera (21); a bracket (24) having a camera fixing part (41) to which the camera (21) is fixed; and a bolt (25) inserted through a bolt insertion hole (40a) provided in the bracket (24) and screwed into a screw hole (19) for an eyebolt provided in a side frame (11a) of the loom. The bracket (24) has a restricting portion (43) that restricts the rotation of the bracket (24) by coming into contact with a protruding portion (18), which is a fixed portion, which is a portion of the loom where the position is not changed.

Description

TECHNICAL FIELD

[0001] The present application relates to an abnormality detection device for a loom. BACKGROUND

[0002] There is known an abnormality detection device for a loom, which includes a camera and a detection section that detects an abnormality of a loom or weaving based on a captured image captured by the camera. For example, Patent Literature 1 discloses an opening defect detection device of a loom that detects an opening defect of a warp yarn. In the opening defect detection device of the loom, the camera is installed at a side frame located on one side in a width direction of the loom among a pair of side frames of the loom. The camera captures an image from the one side in the width direction of the loom toward the other side in the width direction.

[0003] Patent Literature 1: Japanese Patent Application Laid-Open No. 2020-196972

[0004] Generally, a pair of side frames are respectively provided with screw holes for lifting eye bolts used when the loom is carried. In the case where the camera is installed at the side frame, for example, it is conceivable to fix the camera with a bolt with respect to the screw holes for the lifting eye bolts.

[0005] However, in the case where the camera continuously captures an image during the operation of the loom, there is a case where the capturing range of the camera is misaligned due to the vibration of the loom. In this case, it is not easy to perform the image processing of the captured image, the comparison of the captured images during the operation of the loom. Further, in the case where the abnormality detection device for a loom is used back and forth among a plurality of looms, if the capturing range of the camera is different for each loom, it is not easy to perform the comparison of the captured images among the plurality of looms. SUMMARY

[0006] An abnormality detection device for a loom for solving the above-described problem point includes a camera, a detection section that detects an abnormality of a loom or weaving based on a captured image captured by the camera, a bracket that has a camera fixing section in which the camera is fixed, and a bolt that is inserted into a bolt insertion hole provided at the bracket and screwed into a screw hole for a lifting eye bolt provided at a side frame of the loom. The gist of the abnormality detection device for the loom is that the bracket has a restriction section that restricts the rotation of the bracket by abutting against a portion in the loom that does not change in position, i.e., a fixed position.

[0007] According to the above structure, if the bracket is to be rotated with respect to the side frame with the bolt as the center, the restriction portion comes into abutment with the fixed portion of the loom, thereby restricting the rotation of the bracket. Therefore, the rotation of the camera fixed at the camera fixing portion of the bracket is also restricted. Thus, it is possible to keep the photographing range of the camera constant. As a result, even if photographing is continuously performed by the camera during the operation of the loom, the photographing range of the camera is less likely to be misaligned, and thus it is easy to perform image processing of the photographed image, comparison of the photographed images during the operation of the loom. Further, in the case where the loom abnormality detection device is used back and forth between a plurality of looms, the photographing range of the camera is less likely to be misaligned for each loom, and thus it is easy to compare the photographed images between the plurality of looms.

[0008] Also, in the loom abnormality detection device described above, a light source that illuminates the photographing range of the camera can be provided, and the bracket can have a light source fixing portion that fixes the light source. According to the above structure, by restricting the rotation of the bracket with the restriction portion, the rotation of the light source fixed at the light source fixing portion of the bracket is also restricted. Thus, it is possible to keep the range illuminated by the light source constant. Further, it is possible to keep the positional relationship between the camera and the light source constant.

[0009] Also, in the loom abnormality detection device described above, the side frame can have a protruding portion that protrudes from the upper surface as the fixed portion, and the protruding portion can have a rectangular shape when viewed from above. The screw hole can be opened at the end surface of the protruding portion, and the restriction portion can restrict the rotation of the bracket by coming into abutment with the side surface of the protruding portion.

[0010] According to the above structure, the restriction portion restricts the rotation of the bracket by coming into abutment with the side surface of the protruding portion that is the fixed portion. The protruding portion is a conventional structure provided in the side frame of the loom as a portion into which the end portion of the hanger bolt is inserted. Thus, it is not necessary to add a fixed portion to the loom. Therefore, it is possible to use the loom abnormality detection device in the existing loom.

[0011] Also, in the loom abnormality detection device described above, the restriction portion can be composed of a pair of restriction plates that are disposed to sandwich the protruding portion. According to the above structure, for example, compared with the case where the restriction portion is composed of the first restriction plate, even if intense vibration during the operation of the loom is applied to the bracket, it is easy to keep the photographing range of the camera constant.

[0012] Also, in the loom abnormality detection device described above, the loom can have an operation portion provided in the side frame as the fixed portion, and the restriction portion can restrict the rotation of the bracket by coming into abutment with the back surface of the housing of the operation portion.

[0013] According to the above structure, the restriction portion restricts the rotation of the bracket by abutting against the housing back surface as the fixing portion of the operation portion. The operation portion is a conventional structure of the loom in which a portion for operating the loom is provided to the side frame. Therefore, it is not necessary to additionally provide a fixing portion to the loom. Therefore, the loom abnormality detection device can be used in the existing loom.

[0014] In the loom abnormality detection device, the adjustment member can be provided to abut against the restriction portion and the fixing portion, respectively, between the restriction portion and the fixing portion, and adjust the angle of the bracket with respect to the left-right direction of the loom.

[0015] According to the above structure, the adjustment member can adjust the angle of the bracket with respect to the left-right direction of the loom. Therefore, the photographing range of the camera fixed to the camera fixing portion of the bracket can be adjusted. Further, if the bracket is to be rotated with respect to the side frame around the bolt as the center, the restriction portion abuts against the fixing portion of the loom via the adjustment member, and thus the rotation of the bracket is restricted. Therefore, the photographing range of the camera can be kept constant.

[0016] According to the present application, the photographing range of the camera can be kept constant. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a plan view of a loom.

[0018] Figure 2 is a perspective view of a protruding portion.

[0019] Figure 3 is a perspective view of a loom abnormality detection device according to an embodiment.

[0020] Figure 4 is a side view of a loom abnormality detection device according to an embodiment.

[0021] Figure 5 is a plan view of a loom abnormality detection device according to an embodiment.

[0022] Figure 6 is a plan view of a modification of a loom abnormality detection device.

[0023] Figure 7 is a plan view of a modification of a loom abnormality detection device.

[0024] Figure 8 is a plan view of a modification of a loom abnormality detection device.

[0025] Figure 9 is a perspective view of a modification of a loom abnormality detection device.

[0026] Description of Reference Numerals

[0027] 10...loom; 11a...side frame (first side frame); 17...operating portion serving as a fixing portion; 17b...housing; 18...protrusion serving as a fixing portion; 18a...side surface; 18b...side surface; 19...screw hole; 20...abnormality detection device for loom; 21...camera; 22...light source; 23...detection portion; 24...bracket; 25...bolt; 26...adjustment member; 40a...bolt insertion hole; 41...camera fixing portion; 42...light source fixing portion; 43...restriction portion; 43a...restriction plate; 43b...restriction plate; 110...upper surface; 170...back surface; 180...end surface; B...eye bolt. DETAILED DESCRIPTION

[0028] The following, according to Figures 1-5 An embodiment of a loom abnormality detection device will be described. The loom abnormality detection device of this embodiment is used in an air jet loom. The loom abnormality detection device of this embodiment detects abnormality in the shedding of warp yarns as a weaving abnormality.

[0029] Loom

[0030] like Figure 1 As shown, the loom 10 includes a frame 11. The frame 11 includes a pair of side frames 11a and 11b. The side frames 11a and 11b are located at both ends of the loom 10 in the left-right direction. Of the side frames 11a and 11b, the first side frame 11a is located at the left end, and the second side frame 11b is located at the right end. The side frames 11a and 11b are fixed portions of the loom 10 whose positions do not change.

[0031] A plurality of warp yarns T are arranged in the left-right direction of the loom 10. Each warp yarn T extends in the front-to-back direction of the loom 10. The warp yarns T are drawn from a supply roller (not shown) located at the rear of the frame 11. After being woven into a fabric W, the warp yarns T are taken up by a take-up roller (not shown) located at the front of the frame 11. The warp yarns T travel from rear to front in the front-to-back direction of the loom 10.

[0032] The loom 10 has a warp opening device 12 that opens the warp T. The warp opening device 12 has, for example, two harness frames 12a, 12b. The two harness frames 12a, 12b are arranged in the front-rear direction of the loom 10. A plurality of heddles, not shown, are provided on each of the harness frames 12a, 12b. The plurality of heddles are arranged in the left-right direction of the loom 10. A part of the plurality of warps T arranged in the left-right direction of the loom 10 are inserted through the heddles of one of the harness frames 12a, and the other warps T are inserted through the heddles of the other harness frame 12b. Each of the harness frames 12a, 12b is reciprocally moved in the up-down direction of the loom 10. When one of the harness frames 12a is moved upward, the other harness frame 12b is moved downward. When one of the harness frames 12a is moved downward, the other harness frame 12b is moved upward. Thus, the opening of the warp T is formed by the warp T inserted through the heddles of one of the harness frames 12a and the warp T inserted through the heddles of the other harness frame 12b. The opening of the warp T has an inlet T1 and an outlet T2. The inlet T1 is located at the left end of the opening in the left-right direction of the loom 10. The outlet T2 is located at the right end of the opening in the left-right direction of the loom 10.

[0033] The loom 10 has a weft insertion device 13. The weft insertion device 13 has a main nozzle 14 and a plurality of sub nozzles 15. The main nozzle 14 is attached to the first side frame 11a. The main nozzle 14 wefts the weft Y with respect to the opening of the warp T in the left-right direction of the loom 10 by ejecting air. The weft Y enters the opening from the inlet T1. The weft Y is threaded in the opening in the left-right direction of the loom 10 and then exits the opening from the outlet T2. The direction in which the weft Y is wefted by the main nozzle 14 is referred to as a weft insertion direction. The weft insertion direction is a direction from the left side toward the right side in the left-right direction of the loom 10.

[0034] The plurality of sub nozzles 15 are arranged in the front-rear direction of the loom 10 further forward than the warp opening device 12. The plurality of sub nozzles 15 are arranged in the weft insertion direction further downstream than the main nozzle 14. The plurality of sub nozzles 15 are arranged in the left-right direction of the loom 10. Each of the sub nozzles 15 ejects air toward the weft Y wefted to the opening of the warp T.

[0035] The loom 10 has a reed 16 that beats up the weft Y wefted to the opening of the warp T. The reed 16 is arranged between the warp opening device 12 and the plurality of sub nozzles 15 in the front-rear direction of the loom 10. The reed 16 is arranged further downstream than the main nozzle 14 in the weft insertion direction. A weft threading passage 16a is formed in the reed 16. The weft threading passage 16a is located in the opening of the warp T when the weft Y is wefted. The weft Y wefted to the opening of the warp T is threaded in the weft threading passage 16a.

[0036] The loom 10 performs weaving by repeatedly moving the warp yarn T from the rear of the loom 10 in the front-rear direction toward the front, while performing the opening action of the warp yarn T by the warp yarn opening device 12, the weft insertion action of the weft yarn Y by the weft insertion device 13, and the beating-up action by the reed 16.

[0037] The loom 10 is provided with an operation section 17. The operation section 17 is provided to the first side frame 11a. In the front-rear direction of the loom 10, the operation section 17 is provided more to the front than the main nozzle 14. The operation section 17 has a display section 17a that displays an operation screen of the loom 10 and a housing 17b that houses the display section 17a. The operation section 17 is a fixed part of the loom 10.

[0038] As shown in Figure 1 and Figure 2 , the first side frame 11a has a protruding section 18 that protrudes from the upper surface 110. The protruding section 18 is formed integrally with the first side frame 11a. In the front-rear direction of the loom 10, the protruding section 18 is disposed between the main nozzle 14 and the operation section 17. As described above, each of the pair of side frames 11a, 11b is a fixed part of the loom 10. Therefore, the protruding section 18 that is formed integrally with the first side frame 11a is also a fixed part of the loom 10.

[0039] As shown in Figure 2 , a screw hole 19 is provided at the protruding section 18. The screw hole 19 opens at the end surface 180 of the protruding section 18. The screw hole 19 is screwed into a lifting eye bolt B used when the loom 10 is lifted by a crane at the time of transportation of the loom 10. That is, the screw hole 19 for the lifting eye bolt B used at the time of transportation of the loom 10 is provided to the first side frame 11a. The lifting eye bolt B is removed from the screw hole 19 at times other than the time of transportation of the loom 10.

[0040] The protruding section 18 of the present embodiment is a quadrangular prism shape. In plan view, the protruding section 18 is rectangular. The protruding section 18 has a pair of side surfaces 18a, 18b. In the left-right direction of the loom 10, the pair of side surfaces 18a, 18b are paired.

[0041] <LOOM ABNORMALITY DETECTION DEVICE>

[0042] As shown in Figure 1 and Figure 3 , the loom abnormality detection device 20 is provided with a camera 21, a light source 22, a detection section 23, a bracket 24, and a bolt 25.

[0043] The camera 21 is a digital camera. The camera 21 has a photographing element. Examples of the photographing element include a CCD image sensor (Charge Coupled Device image sensor) and a CMOS image sensor (Complementary Metal Oxide Semiconductor image sensor). The camera 21 photographs an object detected by the loom abnormality detection device 20 to determine whether an abnormality has occurred. The object in this embodiment is the opening of the warp yarn T. Therefore, the camera 21 photographs the opening of the warp yarn T. In addition, the camera 21 in this embodiment photographs the opening of the warp yarn T, and also photographs the main nozzle 14, the sub-nozzle 152 located at the second position from the upstream side in the weft insertion direction among the multiple sub-nozzles 15, and the reed 16.

[0044] The light source 22 is, for example, an LED light. The light source 22 illuminates the shooting range of the camera 21. The light source 22 of this embodiment illuminates the opening of the warp yarn T. Figure 1 As shown, the detection unit 23 has a processor 23a and a storage unit 23b. As the processor 23a, for example, a CPU (Central Processing Unit), a GPU (Graphics Processing Unit) and a DSP (Digital Signal Processor) can be cited. The storage unit 23b includes a RAM (Random Access Memory) and a ROM (Read Only Memory). The storage unit 23b stores program codes or instructions configured to enable the processor 23a to perform processing. The storage unit 23b, i.e., the computer-readable medium, includes all available media that can be accessed by a general-purpose or special-purpose computer. Alternatively, the detection unit 23 is composed of hardware circuits such as an ASIC (Application Specific Integrated Circuit) and an FPGA (Field Programmable Gate Array). The detection unit 23 as a processing circuit may include one or more processors, one or more hardware circuits such as an ASIC, an FPGA, or a combination thereof that act in accordance with a computer program.

[0045] The detection unit 23 is connected to the camera 21. The detection unit 23 acquires an image captured by the camera 21. The detection unit 23 detects whether an abnormality has occurred in the loom 10 or during weaving based on the image captured by the camera 21. The detection unit 23 of this embodiment detects whether an abnormality has occurred in the shedding of the warp yarns T based on the image captured by the camera 21.

[0046] Bracket

[0047] As shown in Figure 3 the bracket 24 has a base portion 40, a camera fixing portion 41 for fixing the camera 21, and a light source fixing portion 42 for fixing the light source 22.

[0048] As shown in Figure 4 the base portion 40 is a flat plate. A bolt insertion hole 40a is provided in the base portion 40. The bolt insertion hole 40a penetrates the base portion 40 in the thickness direction. The camera fixing portion 41 extends from the first end portion of the base portion 40 in the thickness direction of the base portion 40. The light source fixing portion 42 extends from the second end portion of the base portion 40 in the thickness direction of the base portion 40. The direction in which the camera fixing portion 41 extends from the base portion 40 is the same direction as the direction in which the light source fixing portion 42 extends from the base portion 40.

[0049] The bracket 24 is fixed to the protruding portion 18 by screwing the bolt 25 inserted into the bolt insertion hole 40a of the base portion 40 into the screw hole 19 of the protruding portion 18. Thus, the camera 21 and the light source 22 are fixed to the first side frame 11a via the bracket 24. As described above, in the front-rear direction of the loom 10, the protruding portion 18 is located between the main nozzle 14 and the operating portion 17. Therefore, in the front-rear direction of the loom 10, the bracket 24, the camera 21, and the light source 22 are located between the main nozzle 14 and the operating portion 17. The camera fixing portion 41 and the light source fixing portion 42 each extend upward from the base portion 40.

[0050] As shown in Figure 5 the long direction of the base portion 40 coincides with the left-right direction of the loom 10. In the left-right direction of the loom 10, the camera fixing portion 41 and the camera 21 are located at the left side of the bolt 25. In the left-right direction of the loom 10, the light source fixing portion 42 and the light source 22 are located at the right side of the bolt 25.

[0051] In the present embodiment, in the left-right direction of the loom 10, the camera 21 captures an image from the left side toward the right side. In other words, the camera 21 captures an image from the upstream side toward the downstream side in the weft insertion direction of the weft yarn Y. Further, the direction in which the camera 21 captures an image is inclined with respect to the left-right direction of the loom 10. The camera 21 captures an image from the front side toward the rear side in the front-rear direction of the loom 10.

[0052] In the left-right direction of the loom 10, the light source 22 emits light from the left side toward the right side. In other words, the light source 22 emits light from the upstream side toward the downstream side in the weft insertion direction of the weft yarn Y. Further, the direction in which the light source 22 emits light is inclined with respect to the left-right direction of the loom 10. The light source 22 emits light from the front side toward the rear side in the front-rear direction of the loom 10. Further, the direction in which the light source 22 emits light is inclined with respect to the horizontal direction. In the up-down direction of the loom 10, the light source 22 emits light from the upper side toward the lower side.

[0053] <Restriction portion>

[0054] As shown in Figure 4 and Figure 5 , the bracket 24 has a restriction portion 43. The restriction portion 43 of the present embodiment is composed of a pair of restriction plates 43a, 43b. Each of the pair of restriction plates 43a, 43b is flat plate-shaped. Each of the pair of restriction plates 43a, 43b protrudes from the lower surface of the base portion 40. In the longitudinal direction of the base portion 40, the first restriction plate 43a of the pair of restriction plates 43a, 43b is located at the first end side than the bolt insertion hole 40a, and in the longitudinal direction of the base portion 40, the second restriction plate 43b is located at the second end side than the bolt insertion hole 40a.

[0055] The pair of restriction plates 43a, 43b are arranged so as to sandwich the protruding portion 18 in the left-right direction of the loom 10. The inner surface of the first restriction plate 43a of the pair of restriction plates 43a, 43b abuts against one of the pair of side surfaces 18a, 18b of the protruding portion 18. The inner surface of the second restriction plate 43b of the pair of restriction plates 43a, 43b abuts against the other of the pair of side surfaces 18a, 18b of the protruding portion 18. Thus, the restriction portion 43 abuts against the fixed portion of the loom 10, that is, the protruding portion 18. The restriction portion 43 restricts the rotation of the bracket 24 by abutting against the protruding portion 18.

[0056] [Effects of the present embodiment]

[0057] The effects of the present embodiment will be described.

[0058] If the bracket 24 is to be rotated with respect to the first side frame 11a with the bolt 25 as the center, the pair of restriction plates 43a, 43b come into contact with the pair of side surfaces 18a, 18b of the protruding portion 18, thereby restricting the rotation of the bracket 24. Thus, the rotation of the camera 21 fixed at the camera fixing portion 41 of the bracket 24 is also restricted, and therefore, it is possible to keep the photographing range of the camera 21 constant.

[0059] [Effects of the present embodiment]

[0060] The effects of the present embodiment will be described.

[0061] (1) The loom abnormality detection device 20 includes a camera 21, a detection unit 23, a bracket 24, and a bolt 25. The detection unit 23 detects an abnormality of the loom 10 or weaving based on a captured image captured by the camera 21. The bracket 24 has a camera fixing portion 41 in which the camera 21 is fixed. The bolt 25 is inserted into a bolt insertion hole 40a provided in the bracket 24 and is screwed into a screw hole 19 provided in the first side frame 11a for a lifting eye bolt B. The bracket 24 has a restriction portion 43 that restricts rotation of the bracket 24 by abutting against a protruding portion 18 that is a fixing portion of the loom 10.

[0062] According to this structure, if the bracket 24 is to be rotated with respect to the first side frame 11a with the bolt 25 as the center, the restriction portion 43 abuts against the protruding portion 18, thereby restricting rotation of the bracket 24. Therefore, rotation of the camera 21 fixed to the camera fixing portion 41 of the bracket 24 is also restricted. Thus, the captured range of the camera 21 can be kept constant. As a result, even if continuous capturing is performed by the camera 21 during operation of the loom 10, the captured range of the camera 21 is less likely to be misaligned, and thus, image processing of the captured image and comparison of the captured image during operation of the loom 10 are easily performed. Further, in a case where the loom abnormality detection device 20 is used back and forth among a plurality of looms 10, the captured range of the camera 21 is less likely to be misaligned for each of the looms 10, and thus, comparison of the captured image among the plurality of looms 10 is easily performed.

[0063] (2) The loom abnormality detection device 20 includes a light source 22 that illuminates the captured range of the camera 21. The bracket 24 has a light source fixing portion 42 in which the light source 22 is fixed. According to this structure, rotation of the light source 22 fixed to the light source fixing portion 42 of the bracket 24 is restricted by the restriction portion 43 restricting rotation of the bracket 24. Thus, the range illuminated by the light source 22 can be kept constant. Further, the positional relationship between the camera 21 and the light source 22 can be kept constant.

[0064] (3) The first side frame 11a has the protruding portion 18 that is a fixing portion protruding from the upper surface 110. The protruding portion 18 is rectangular in plan view. The screw hole 19 is opened at a distal end surface 180 of the protruding portion 18. The restriction portion 43 restricts rotation of the bracket 24 by abutting against a pair of side surfaces 18a, 18b of the protruding portion 18. The protruding portion 18 is a conventional structure provided in the first side frame 11a of the loom 10 as a portion into which a distal end portion of the lifting eye bolt B is inserted. Thus, no additional fixing portion needs to be provided for the loom 10. Thus, the loom abnormality detection device 20 can be used in the existing loom 10.

[0065] (4) The restriction portion 43 is composed of a pair of restriction plates 43a, 43b. The pair of restriction plates 43a, 43b is provided so as to sandwich the protruding portion 18. According to this structure, for example, compared with the case where the restriction portion 43 is composed of the first restriction plate, even if intense vibration at the time of operation of the loom 10 is applied to the bracket 24, it is easy to keep the photographing range of the camera 21 constant.

[0066] (5) The screw hole 19 into which the bolt 25 of the loom abnormality detection device 20 is screwed is an existing screw hole provided for the sling bolt B use at the time of carrying of the loom 10. Therefore, it is not necessary to additionally provide a screw hole for fixing the bracket 24 to the first side frame 11a on the loom 10. Therefore, it is possible to use the loom abnormality detection device 20 in the existing loom 10.

[0067] (6) The camera 21 is fixed to the first side frame 11a by the bolt 25. Therefore, for example, compared with the case where the camera 21 is mounted to the first side frame 11a by a magnetic arm or the like, it is easy to further keep the photographing range of the camera 21 constant.

[0068] [Modification Example]

[0069] In addition, the above-described embodiment can be modified as follows. The above-described embodiment and the following modification example can be implemented in combination with each other within a range in which there is no technical contradiction.

[0070] * In the above-described embodiment, the restriction portion 43 is composed of a pair of restriction plates 43a, 43b, but can be composed of either one of the pair of restriction plates 43a, 43b, or can be composed of three or more restriction plates.

[0071] * In the above-described embodiment, the restriction portion 43 is composed of a pair of restriction plates 43a, 43b protruding from the lower surface of the base portion 40, but is not limited thereto. Furthermore, the restriction portion 43 restricts the rotation of the bracket 24 by abutting against the protruding portion 18 which is a fixing portion, but is not limited thereto.

[0072] For example, it can be that the rotation of the bracket 24 is restricted by the side surface of the base portion 40 of the bracket 24 abutting against the back surface 170 of the housing 17b of the operation portion 17 which is a fixing portion of the loom 10. In this case, the side surface of the base portion 40 is the restriction portion 43.

[0073] The operation portion 17 is an existing structure in which the loom 10 is provided at the first side frame 11a as a portion for operating the loom 10. Therefore, it is possible to restrict the rotation of the bracket 24 even without additionally providing a fixing portion with respect to the loom 10. Therefore, it is possible to use the loom abnormality detection device 20 in the existing loom 10.

[0074] In the above embodiment, the protrusion 18 is rectangular in plan view, but the shape of the protrusion 18 is not limited thereto. Figure 6 However, in this case, if the restricting portion 43 is composed of the pair of restricting plates 43a and 43b of the above embodiment, it will be difficult to restrict the rotation of the bracket 24. Therefore, the restricting portion 43 is configured as follows.

[0075] As an example, the restricting portion 43 is constituted by a pair of restricting protrusions 43c and 43d protruding from the side surface of the base 40 toward the operating portion 17. The pair of restricting protrusions 43c and 43d respectively abut against the back surface 170 of the housing 17b of the operating portion 17, which is a fixed portion of the loom 10.

[0076] In this case, if the bracket 24 attempts to rotate relative to the first side frame 11a in the first direction about the bolt 25, the first restricting protrusion 43c abuts against the back surface 170 of the housing 17b, thereby restricting the rotation of the bracket 24. Furthermore, if the bracket 24 attempts to rotate relative to the first side frame 11a in the second direction, which is opposite to the first direction, about the bolt 25, the second restricting protrusion 43d abuts against the back surface 170 of the housing 17b, thereby restricting the rotation of the bracket 24.

[0077] As another example, when the restricting portion 43 is composed of a pair of restricting plates 43a and 43b protruding from the lower surface of the base 40, the inner surfaces of the pair of restricting plates 43a and 43b are formed into a curved shape along the outer peripheral surface of the protrusion 18.

[0078] The first side frame 11a may not include the protruding portion 18. The screw hole 19 for the eyebolt B may be provided in the first side frame 11a so as to open on the upper surface 110 of the first side frame 11a.

[0079] ○ Such as Figure 7 As shown, the abnormality detection device 20 for the loom may also include an adjustment member 26, and the adjustment member 26 is used to adjust the angle θ of the bracket 24 relative to the left and right direction of the loom 10. An imaginary straight line passing through the center of the bolt 25 and extending in the left and right direction of the loom 10 is set as the first imaginary line L1. An imaginary straight line passing through the center of the bolt 25 and extending in the long side direction of the base 40 of the bracket 24 is set as the second imaginary line L2. The angle θ of the bracket 24 relative to the left and right direction of the loom 10 is the inclination angle of the second imaginary line L2 relative to the first imaginary line L1. Figure 7In the illustrated example, the pair of side surfaces 18a, 18b of the protrusion 18 are in a pair direction (in other words, a direction in which the side surfaces 18a, 18b are aligned, or a direction in which the side surfaces 18a, 18b face each other) that coincides with the left-right direction of the loom 10. Therefore, by adjusting the inclination angle of the long edge direction of the base 40 of the bracket 24 with respect to the pair direction of the pair of side surfaces 18a, 18b of the protrusion 18, the angle Θ of the bracket 24 with respect to the left-right direction of the loom 10 is adjusted.

[0080] In Figure 7 In the illustrated example, the adjustment member 26 is composed of a pair of spacers 26a, 26b. The pair of spacers 26a, 26b are each in a triangular prism shape. The first spacer 26a is disposed between the inner surface of the first restriction plate 43a and one side surface 18a of the protrusion 18. The first spacer 26a is in abutment with the inner surface of the first restriction plate 43a and one side surface 18a of the protrusion 18, respectively. The first spacer 26a is in a wedge shape in which the width decreases as it approaches from the front side to the rear side in the front-rear direction of the loom 10.

[0081] The second spacer 26b is disposed between the inner surface of the second restriction plate 43b and the other side surface 18b of the protrusion 18. The second spacer 26b is in abutment with the inner surface of the second restriction plate 43b and the other side surface 18b of the protrusion 18, respectively. The second spacer 26b is in a wedge shape in which the width increases as it approaches from the front side to the rear side in the front-rear direction of the loom 10.

[0082] In this way, the adjustment member 26 is disposed in abutment with the restriction 43 and the protrusion 18 between the restriction 43 and the protrusion 18, respectively. By the adjustment member 26, the long edge direction of the base 40 of the bracket 24 is inclined with respect to the pair direction of the pair of side surfaces 18a, 18b of the protrusion 18. Therefore, the long edge direction of the base 40 of the bracket 24 is inclined with respect to the left-right direction of the loom 10.

[0083] According to this structure, by the adjustment member 26, the angle Θ of the bracket 24 with respect to the left-right direction of the loom 10 can be adjusted. Therefore, the photographing range of the camera 21 of the camera fixing portion 41 fixed to the bracket 24 can be adjusted. Further, if the bracket 24 is to be rotated with the bolt 25 as the center with respect to the first side frame 11a, the restriction 43 is in abutment with the adjustment member 26 and the adjustment member 26 is in abutment with the protrusion 18, thereby restricting the rotation of the bracket 24. That is, if the bracket 24 is to be rotated with the bolt 25 as the center with respect to the first side frame 11a, the restriction 43 is in abutment with the protrusion 18 via the adjustment member 26, thereby restricting the rotation of the bracket 24. Therefore, it is possible to keep the photographing range of the camera 21 constant.

[0084] The "limiting portion 43 that limits the rotation of the bracket 24 by abutting against the fixed portion of the loom 10" includes not only the limiting portion 43 that limits the rotation of the bracket 24 by directly abutting against the fixed portion as in the above-mentioned embodiment, but also the limiting portion 43 that limits the rotation of the bracket 24 by abutting against the fixed portion via the adjustment member 26 as in the above-mentioned example.

[0085] Alternatively, the first spacer 26a may be wedge-shaped with a width increasing from the front to the rear in the longitudinal direction of the loom 10, and the second spacer 26b may be wedge-shaped with a width decreasing from the front to the rear in the longitudinal direction of the loom 10.

[0086] Alternatively, the angle formed between the surface of each of the spacers 26a and 26b that contacts the restricting portion 43 and the surface that contacts the protrusion 18 may be appropriately changed. As the angle formed between the surface of each of the spacers 26a and 26b that contacts the restricting portion 43 and the surface that contacts the protrusion 18 increases, the inclination angle of the longitudinal direction of the base 40 of the bracket 24 relative to the direction in which the pair of side surfaces 18a and 18b of the protrusion 18 form a larger angle increases.

[0087] Alternatively, the direction in which the pair of side surfaces 18a and 18b of the protruding portion 18 form a pair may be inclined relative to the left-right direction of the loom 10. In this case, for example, the longitudinal direction of the base portion 40 of the bracket 24 may coincide with the left-right direction of the loom 10. In other words, the angle θ of the bracket 24 relative to the left-right direction of the loom 10 may be 0 degrees.

[0088] ○ Such as Figure 8 As shown in FIG. 1 , the abnormality detection device 20 for a loom may include an adjustment member 26 for adjusting the angle θ of the bracket 24 relative to the left-right direction of the loom 10. Figure 8 In the example shown, the back surface 170 of the housing 17b extends in the left-right direction of the loom 10. Therefore, by adjusting the inclination angle of the long side direction of the base 40 of the bracket 24 relative to the back surface 170 of the housing 17b, the angle θ of the bracket 24 relative to the left-right direction of the loom 10 is adjusted. Figure 8 In the example shown, the adjustment member 26 has a triangular prism shape.

[0089] The adjustment member 26 is disposed between the distal ends of the pair of restricting protrusions 43c and 43d and the back surface 170 of the housing 17b of the operating unit 17. The adjustment member 26 abuts against the distal ends of the pair of restricting protrusions 43c and 43d and the back surface 170 of the housing 17b, respectively. The adjustment member 26 has a wedge shape that increases in width from the left side toward the right side in the left-right direction of the loom 10.

[0090] Thus, the adjustment member 26 is disposed between the restriction portion 43 and the housing 17b of the operating unit 17 so as to abut against the restriction portion 43 and the housing 17b, respectively. The adjustment member 26 tilts the longitudinal direction of the base 40 of the bracket 24 relative to the rear surface 170 of the housing 17b. Consequently, the longitudinal direction of the base 40 of the bracket 24 tilts relative to the left-right direction of the loom 10.

[0091] According to this structure, the angle θ of the bracket 24 relative to the left-right direction of the loom 10 can be adjusted using the adjustment member 26. Therefore, the imaging range of the camera 21 fixed to the camera fixing portion 41 of the bracket 24 can be adjusted. Furthermore, when the bracket 24 attempts to rotate relative to the first side frame 11a about the bolt 25, the restricting portion 43 abuts the adjustment member 26, and the adjustment member 26 abuts the housing 17b, thereby restricting the rotation of the bracket 24. In other words, when the bracket 24 attempts to rotate relative to the first side frame 11a about the bolt 25, the restricting portion 43 abuts the housing 17b via the adjustment member 26, thereby restricting the rotation of the bracket 24. Therefore, the imaging range of the camera 21 can be maintained constant.

[0092] Alternatively, the adjustment member 26 may be wedge-shaped, with its width decreasing from the left side to the right side in the left-right direction of the loom 10. Alternatively, the angle formed between the surface of the adjustment member 26 that contacts the restricting portion 43 and the surface that contacts the back surface 170 of the housing 17b may be appropriately changed. The greater the angle formed between the surface of the adjustment member 26 that contacts the restricting portion 43 and the surface that contacts the back surface 170 of the housing 17b, the greater the inclination angle of the longitudinal direction of the base 40 of the bracket 24 relative to the back surface 170 of the housing 17b.

[0093] Alternatively, the back surface 170 of the housing 17b may be inclined relative to the left-right direction of the loom 10. In this case, for example, the longitudinal direction of the base 40 of the bracket 24 may coincide with the left-right direction of the loom 10. In other words, the angle θ of the bracket 24 relative to the left-right direction of the loom 10 may be 0 degrees.

[0094] The adjustment member 26 may not be in the shape of a triangular prism. The adjustment member 26 may be in the shape of a rectangular parallelepiped, for example.

[0095] ○In Figure 7 In the example shown, the first spacer 26 a of the adjustment member 26 may be integrally formed with the first restriction plate 43 a of the restriction portion 43 , and the second spacer 26 b of the adjustment member 26 may be integrally formed with the second restriction plate 43 b of the restriction portion 43 .

[0096] ○In Figure 8 In the illustrated example, the adjustment member 26 may be formed integrally with the restriction portion 43 of the bracket 24 .

[0097] ○As Figure 9 shown, the bracket 24 can have an arm 44 that stands upward from a front side end portion of the base 40 in the front-rear direction of the loom 10 and extends in the left-right direction of the loom 10. In Figure 9 the example shown, the camera fixing portion 41 extends from a first end portion of the arm 44 toward the rear in the front-rear direction of the loom 10. The light source fixing portion 42 extends from a second end portion of the arm 44 toward the rear in the front-rear direction of the loom 10. In this case, the length of the base 40 in the left-right direction of the loom 10 can be shortened, and thus, even if a component exists around the protruding portion 18, the base 40 can be prevented from interfering with the component.

[0098] In Figure 9 the example shown, the restriction portion 43 is composed of a pair of restriction plates 43a, 43b that extend from the lower surface of the base 40, but is not limited thereto. The rotation of the bracket 24 can be restricted by the front surface of the arm 44 abutting against the back surface 170 of the housing 17b of the operation portion 17. In this case, the arm 44 is the restriction portion 43, and thus, the pair of restriction plates 43a, 43b can not exist.

[0099] Although not shown, the arm 44 can stand upward from a rear side end portion of the base 40 in the front-rear direction of the loom 10 and extend in the left-right direction of the loom 10. The camera fixing portion 41 can extend from a first end portion of the arm 44 toward the front in the front-rear direction of the loom 10, for example. The light source fixing portion 42 can extend from a second end portion of the arm 44 toward the front in the front-rear direction of the loom 10, for example. In this case, the length of the base 40 in the left-right direction of the loom 10 can be shortened, and thus, even if a component exists around the protruding portion 18, the base 40 can be prevented from interfering with the component.

[0100] Although not shown, the arm 44 can have a first arm portion that extends upward from the base 40 and a second arm portion that extends in the left-right direction of the loom 10 from an upper end portion of the first arm portion. The camera fixing portion 41 can extend downward from a first end portion of the second arm portion. The light source fixing portion 42 can extend downward from a second end portion of the second arm portion. In this case, the length of the base 40 in the left-right direction of the loom 10 can be shortened, and thus, even if a component exists around the protruding portion 18, the base 40 can be prevented from interfering with the component.

[0101] ○In the above-described embodiment, the camera fixing portion 41 and the camera 21 are disposed on the left side of the bolt 25 in the left-right direction of the loom 10, and the light source fixing portion 42 and the light source 22 are disposed on the right side of the bolt 25 in the left-right direction of the loom 10, but are not limited thereto.

[0102] For example, it can also be that the camera fixing portion 41 and the camera 21 are disposed to the right of the bolt 25 in the left-right direction of the loom 10, and the light source fixing portion 42 and the light source 22 are disposed to the left of the bolt 25 in the left-right direction of the loom 10.

[0103] For example, it can also be that the camera fixing portion 41, the light source fixing portion 42, the camera 21, and the light source 22 are disposed to the right or left of the bolt 25 in the left-right direction of the loom 10.

[0104] It can also be that the loom abnormality detection device 20 does not have the light source 22.

[0105] It can also be that the camera 21 and the light source 22 are unitized and fixed to the bracket 24 in the unitized state. In this case, the camera fixing portion 41 doubles as the light source fixing portion 42.

[0106] It can also be that the light source 22 is fixed to the first side frame 11a by being fixed to a bracket different from the bracket 24 in which the camera 21 is fixed.

[0107] The loom abnormality detection device 20 of the above-described embodiment detects an abnormality of the opening of the warp yarn T, but can also detect an abnormality other than the opening of the warp yarn T.

[0108] For example, the loom abnormality detection device 20 can detect an abnormality of the loom 10 such as the main nozzle 14, the series nozzle, the EDP (length measuring cylinder), the ABS (weft yarn tension correction device), the cutter, and the like. In this case, as with the above-described embodiment, the bracket 24 is fixed to the first side frame 11a by screwing the bolt 25 inserted through the bolt insertion hole 40a of the base 40 into the bolt hole 19 for the eye bolt B provided in the first side frame 11a. Therefore, the camera 21 and the light source 22 fixed to the bracket 24 are also fixed to the first side frame 11a.

[0109] For example, the loom abnormality detection device 20 can detect an abnormality of the opening of the warp yarn T from the outlet T2 side, and can also detect an abnormality of a weft yarn arrival sensor that detects whether the weft yarn Y has arrived at the outlet T2 of the opening of the warp yarn T. In this case, the bracket 24 is fixed to the second side frame 11b by screwing the bolt 25 inserted through the bolt insertion hole 40a of the base 40 into a not-illustrated bolt hole for the eye bolt B provided in the second side frame 11b. Therefore, the camera 21 and the light source 22 fixed to the bracket 24 are also fixed to the second side frame 11b.

[0110] The loom abnormality detection device 20 can also be used in looms other than air-jet looms such as water-jet looms.

[0111] [Postscript]

[0112] The following describes the technical ideas that can be grasped from the above embodiments and modifications.

[0113] <Note 1>

[0114] An abnormality detection device for a loom, comprising: a camera; a detection unit that detects an abnormality of a loom or weaving based on a captured image captured by the camera; a bracket having a camera fixing portion for fixing the camera; and a bolt that is inserted into a bolt insertion hole provided at the bracket and screwed into a screw hole for a hanger bolt provided at a side frame of the loom, wherein the bracket has a restriction portion that restricts rotation of the bracket by abutting against a fixed portion that does not change in position in the loom.

[0115] <Note 2>

[0116] In the abnormality detection device for a loom according to Note 1, a light source that illuminates a range of the camera is provided, and the bracket has a light source fixing portion for fixing the light source.

[0117] <Note 3>

[0118] In the abnormality detection device for a loom according to Note 1 or Note 2, the side frame has a protruding portion that protrudes from an upper surface as the fixed portion, the protruding portion is rectangular in plan view, the screw hole is open at an end surface of the protruding portion, and the restriction portion restricts rotation of the bracket by abutting against a side surface of the protruding portion.

[0119] <Note 4>

[0120] In the abnormality detection device for a loom according to Note 3, the restriction portion is composed of a pair of restriction plates that are disposed to sandwich the protruding portion.

[0121] <Note 5>

[0122] In the abnormality detection device for a loom according to Note 1 or Note 2, the loom has an operation portion provided at the side frame as the fixed portion, and the restriction portion restricts rotation of the bracket by abutting against a back surface of a housing of the operation portion.

[0123] <Note 6>

[0124] In the abnormality detection device for a loom according to any one of Notes 1 to 5, an adjustment member is provided that is configured to abut against the restriction portion and the fixed portion, respectively, between the restriction portion and the fixed portion, and adjust an angle of the bracket with respect to a left-right direction of the loom.

Claims

1. An abnormality detection device for a loom, comprising: a camera; a detection unit that detects an abnormality of a loom or weaving based on a captured image captured by the camera; a bracket having a camera fixing portion for fixing the camera; and a bolt that is inserted into a bolt insertion hole provided at the bracket and is screwed into a screw hole for a hanger bolt provided at a side frame of the loom, the abnormality detection device for the loom being characterized in that the bracket has a restriction portion that restricts rotation of the bracket by abutting against a fixed portion that is a portion of the loom whose position does not change.

2. The abnormality detection device for the loom according to claim 1, characterized in that a light source that illuminates a range of the camera to be captured is provided, and the bracket has a light source fixing portion for fixing the light source.

3. The abnormality detection device for the loom according to claim 1 or 2, characterized in that the side frame has a protruding portion that is the fixed portion and protrudes from an upper surface, the protruding portion is rectangular in plan view, the screw hole is open at an end surface of the protruding portion, and the restriction portion restricts rotation of the bracket by abutting against a side surface of the protruding portion.

4. The abnormality detection device for the loom according to claim 3, characterized in that the restriction portion is composed of a pair of restriction plates, and the pair of restriction plates are provided so as to sandwich the protruding portion.

5. The abnormality detection device for the loom according to claim 1 or 2, characterized in that the loom has an operation portion that is the fixed portion and is provided at the side frame, and the restriction portion restricts rotation of the bracket by abutting against a back surface of a housing of the operation portion.

6. The abnormality detection device for the loom according to any one of claims 1 to 5, characterized in that an adjustment member that is configured to abut against the restriction portion and the fixed portion, respectively, between the restriction portion and the fixed portion, and adjust an angle of the bracket with respect to a left-right direction of the loom is provided. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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