Abnormality detection device for loom

Abstract

To provide an abnormality detection device for a loom capable of keeping a photographic range by a camera constant.SOLUTION: An abnormality detection device 20 for a loom includes: a camera 21; a detection part for detecting abnormality of a loom or weaving on the basis of a photographed image by the camera 21; a bracket 24 having a camera-fixing part 41 fixed with the camera 21; and a bolt 25 which is inserted into a bolt-inserting hole 40a provided on the bracket 24, and screwed into a screw hole 19 for an eyebolt provided on a side frame 11a of the loom. The bracket 24 has a restriction part 43 for restricting rotation of the bracket 24 by touching a protruded part 18 as a stationary part of a part which dose not change a position on the loom.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an abnormality detection device for a loom. [Background technology]

[0002] There is known an abnormality detection device for a loom that includes a camera and a detection unit that detects abnormalities in the loom or weaving process based on images captured by the camera. For example, Patent Document 1 discloses a loom shedding defect detection device that detects improper shedding of warp yarns. In the loom shedding defect detection device, the camera is attached to one of a pair of side frames of the loom that is located on one side in the width direction of the loom. The camera takes images from one side to the other side in the width direction of the loom. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-196972 Summary of the Invention [Problem to be solved by the invention]

[0004] Generally, each of the pair of side frames is provided with a threaded hole for an eyebolt used when transporting the loom. When attaching a camera to the side frame, for example, it is conceivable to fix the camera to the threaded hole for the eyebolt with a bolt.

[0005] However, when continuous camera photography is performed while a loom is in operation, the camera's photography range may shift due to loom vibration. This makes it difficult to process the photographed images or compare the images taken while the loom is in operation. Furthermore, when a loom abnormality detection device is used on multiple looms, it becomes difficult to compare the photographed images between multiple looms if the camera's photography range differs for each loom. [Means for solving the problem]

[0006] The gist of the abnormality detection device for a loom that solves the above problems is that it comprises a camera, a detection unit that detects abnormalities in the loom or weaving based on images captured by the camera, a bracket having a camera fixing unit to which the camera is fixed, and a bolt that is inserted into a bolt insertion hole provided in the bracket and screwed into a screw hole for an eyebolt provided in a side frame of the loom, wherein the bracket has a regulating unit that regulates rotation of the bracket by abutting against a fixed portion that is a part of the loom whose position does not change.

[0007] According to the above configuration, when the bracket attempts to rotate around the bolt relative to the side frame, the restricting portion abuts against the fixed portion of the loom, restricting the rotation of the bracket. This restricts the rotation of the camera fixed to the camera fixing portion of the bracket. This allows the camera's imaging range to be kept constant. As a result, even if the camera continuously takes images while the loom is operating, the camera's imaging range is less likely to shift, facilitating image processing of the captured images and comparison of images taken during the loom's operation. Furthermore, when the loom abnormality detection device is used on multiple looms, the camera's imaging range is less likely to vary from loom to loom, facilitating comparison of images taken between multiple looms.

[0008] The above-described loom abnormality detection device may further include a light source that illuminates a range photographed by the camera, and the bracket may have a light source fixing portion to which the light source is fixed. According to the above configuration, the rotation of the bracket is restricted by the restricting portion, which also restricts the rotation of the light source fixed to the light source fixing portion of the bracket. Therefore, the range illuminated by the light source can be kept constant. Also, the positional relationship between the camera and the light source can be kept constant.

[0009] In the above-mentioned abnormality detection device for a loom, the side frame may have a protrusion as the fixing portion protruding from the upper surface, the protrusion having a rectangular shape in a plan view, the screw hole opening at the tip surface of the protrusion, and the regulating portion may regulate rotation of the bracket by abutting against a side surface of the protrusion.

[0010] According to the above configuration, the restricting portion restricts rotation of the bracket by abutting against the side surface of the protruding portion serving as a fixing portion. The protruding portion is an existing component of the loom that has been provided on the side frame as a portion into which the tip of the eyebolt is inserted. This eliminates the need to provide a new fixing portion for the loom. Therefore, the loom abnormality detection device can be used on existing looms.

[0011] In the above-described abnormality detection device for a loom, the regulating portion may be configured by a pair of regulating plates, and the pair of regulating plates may be arranged to sandwich the protruding portion. According to the above configuration, for example, compared to when the regulating section is configured by a single regulating plate, it is easier to keep the camera's shooting range constant even if severe vibrations are applied to the bracket when the loom is in operation.

[0012] In the above-mentioned abnormality detection device for a loom, the loom may have an operating unit as the fixed portion provided on the side frame, and the regulating unit may regulate the rotation of the bracket by abutting against the back surface of a housing of the operating unit.

[0013] According to the above configuration, the restricting portion restricts rotation of the bracket by abutting against the rear surface of the housing of the operating portion, which serves as a fixed portion. The operating portion is an existing component of the loom that has been previously provided on the side frame as a portion for operating the loom. Therefore, it is not necessary to provide a new fixed portion for the loom. Therefore, the loom abnormality detection device can be used on existing looms.

[0014] The above-mentioned abnormality detection device for a loom may further include an adjustment member that is arranged between the regulating portion and the fixed portion so as to abut against each of the regulating portion and the fixed portion, and that adjusts the angle of the bracket relative to the left-right direction of the loom.

[0015] According to the above configuration, the angle of the bracket relative to the left-right direction of the loom can be adjusted by the adjustment member. This allows the camera fixed to the bracket's camera fixing portion to adjust its shooting range. Furthermore, when the bracket attempts to rotate relative to the side frame around the bolt, the restricting portion abuts against the fixing portion of the loom via the adjustment member, thereby restricting the bracket's rotation. This allows the camera's shooting range to be kept constant. [Effects of the Invention]

[0016] According to the present invention, the imaging range of the camera can be kept constant. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a plan view of a loom. [Figure 2] FIG. 2 is a perspective view showing the protrusion. [Figure 3] FIG. 3 is a perspective view showing an abnormality detection device for a loom according to an embodiment. [Figure 4] FIG. 4 is a side view showing the abnormality detection device for a loom according to the embodiment. [Figure 5] FIG. 5 is a plan view showing an abnormality detection device for a loom according to an embodiment. [Figure 6] FIG. 6 is a plan view showing a modified example of the abnormality detection device for a loom. [Figure 7] FIG. 7 is a plan view showing a modified example of the abnormality detection device for a loom. [Figure 8] FIG. 8 is a plan view showing a modified example of the abnormality detection device for a loom. [Figure 9] FIG. 9 is a perspective view showing a modified example of an abnormality detection device for a loom. DETAILED DESCRIPTION OF THE INVENTION

[0018] An embodiment of a loom abnormality detection device will be described below with reference to Figures 1 to 5. The loom abnormality detection device of this embodiment is used in an air jet loom. The loom abnormality detection device of this embodiment detects abnormalities in the shedding of warp yarns as weaving abnormalities.

[0019] <Loom> As shown in Figure 1, the loom 10 includes a frame 11. The frame 11 has a pair of side frames 11a, 11b. The pair of side frames 11a, 11b are located at both ends of the loom 10 in the left-right direction. Of the pair of side frames 11a, 11b, one side frame 11a is located at the left end, and the other side frame 11b is located at the right end. Each of the pair of side frames 11a, 11b is a fixed portion, which is a portion whose position on the loom 10 does not change.

[0020] A plurality of warp threads T are arranged in the left-right direction of the loom 10. Each warp thread T extends in the front-rear direction of the loom 10. The warp threads T are drawn out from a supply roll (not shown) provided at the rear of the frame 11. After being woven into a fabric W, the warp threads T are wound up by a take-up roll (not shown) provided at the front of the frame 11. The warp threads T move from the rear to the front in the front-rear direction of the loom 10.

[0021] The loom 10 is equipped with a warp shedding device 12 that sheds warp threads T. The warp shedding device 12 has, for example, two heald frames 12a, 12b. The two heald frames 12a, 12b are aligned in the front-to-rear direction of the loom 10. Each heald frame 12a, 12b is provided with a plurality of healds (not shown). The plurality of healds are arranged in the left-to-right direction of the loom 10. Of the plurality of warp threads T aligned in the left-to-right direction of the loom 10, some warp threads T are threaded through the healds of one heald frame 12a, and the other warp threads T are threaded through the healds of the other heald frame 12b. Each heald frame 12a, 12b moves back and forth in the up-and-down direction of the loom 10. When one heald frame 12a moves upward, the other heald frame 12b moves downward. When one heald frame 12a moves downward, the other heald frame 12b moves upward. As a result, a shed for the warp threads T is formed by the warp threads T threaded through the healds of one heald frame 12a and the warp threads T threaded through the healds of the other heald frame 12b. The shed for the warp threads T has an entrance T1 and an exit T2. The entrance T1 is located at the left end of the shed in the left-right direction of the loom 10. The exit T2 is located at the right end of the shed in the left-right direction of the loom 10.

[0022] The loom 10 is equipped with 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 one of the side frames 11a. The main nozzle 14 ejects air to insert the weft Y in the left-right direction of the loom 10 into the shed of the warp threads T. The weft Y enters the shed from the entrance T1. The weft Y travels through the shed in the left-right direction of the loom 10, and then exits the shed from the exit T2. The direction in which the weft Y is inserted by the main nozzle 14 is called the weft insertion direction. The weft insertion direction is from the left to the right in the left-right direction of the loom 10.

[0023] The multiple sub-nozzles 15 are arranged forward of the warp shedding device 12 in the front-to-rear direction of the loom 10. The multiple sub-nozzles 15 are arranged downstream of the main nozzle 14 in the weft insertion direction. The multiple sub-nozzles 15 are arranged in the left-to-right direction of the loom 10. Each sub-nozzle 15 sprays air onto the weft Y inserted into the shed for the warp T.

[0024] The loom 10 is equipped with a reed 16 that beats the weft Y inserted into the shed for the warp T. The reed 16 is arranged between the warp shedding device 12 and the multiple sub-nozzles 15 in the front-to-rear direction of the loom 10. The reed 16 is arranged downstream of the main nozzle 14 in the weft insertion direction. The reed 16 is formed with a weft flight path 16a. When the weft Y is inserted, the weft flight path 16a is located within the shed for the warp T. The weft Y inserted into the shed for the warp T flies within the weft flight path 16a.

[0025] The loom 10 weaves by moving the warp thread T from the rear to the front in the longitudinal direction of the loom 10, while repeating the shedding operation of the warp thread T by the warp shedding device 12, the weft insertion operation of the weft thread Y by the weft insertion device 13, and the beating operation by the reed 16.

[0026] The loom 10 is equipped with an operating unit 17. The operating unit 17 is provided on one of the side frames 11a. The operating unit 17 is provided forward of the main nozzle 14 in the front-to-rear direction of the loom 10. The operating unit 17 has a display unit 17a that displays the operating screen of the loom 10, and a housing 17b that houses the display unit 17a. The operating unit 17 is a fixed part of the loom 10.

[0027] As shown in Figures 1 and 2, one of the side frames 11a has a protrusion 18 that protrudes from the upper surface 110. The protrusion 18 is integrally formed with the one of the side frames 11a. The protrusion 18 is disposed between the main nozzle 14 and the operating unit 17 in the front-to-rear direction of the loom 10. As described above, each of the pair of side frames 11a, 11b is a fixed part of the loom 10. Therefore, the protrusion 18 that is integrally formed with the one of the side frames 11a is also a fixed part of the loom 10.

[0028] As shown in Fig. 2, the protrusion 18 has a threaded hole 19. The threaded hole 19 opens at a tip end surface 180 of the protrusion 18. An eyebolt B, which is used to hoist the loom 10 by a crane when transporting the loom 10, is screwed into the threaded hole 19. That is, one of the side frames 11a has a threaded hole 19 for the eyebolt B, which is used when transporting the loom 10. When the loom 10 is not being transported, the eyebolt B is removed from the threaded hole 19.

[0029] In this embodiment, the protrusion 18 has a quadrangular prism shape. The protrusion 18 has a rectangular shape in a plan view. The protrusion 18 has a pair of side surfaces 18a, 18b. The pair of side surfaces 18a, 18b form a pair in the left-right direction of the loom 10.

[0030] <Loom malfunction detection device> As shown in FIGS. 1 and 3, the loom abnormality detection device 20 includes a camera 21, a light source 22, a detection unit 23, a bracket 24, and a bolt 25.

[0031] The camera 21 is a digital camera. The camera 21 has an imaging element. Examples of imaging elements 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 for which the loom abnormality detection device 20 detects whether an abnormality has occurred. In this embodiment, the object is the shedding of the warp threads T. Therefore, the camera 21 photographs the shedding of the warp threads T. In this embodiment, the camera 21 also photographs the main nozzle 14, the sub-nozzle 152, which is the second sub-nozzle from the upstream side in the weft insertion direction among the multiple sub-nozzles 15, and the reed 16, in addition to the shedding of the warp threads T.

[0032] The light source 22 is, for example, an LED light. The light source 22 illuminates the area to be photographed by the camera 21. The light source 22 in this embodiment illuminates the opening for the warp threads T. As shown in FIG. 1, the detection unit 23 includes a processor 23a and a storage unit 23b. The processor 23a may be, for example, a central processing unit (CPU), a graphics processing unit (GPU), or a digital signal processor (DSP). The storage unit 23b includes a random access memory (RAM) and a read-only memory (ROM). The storage unit 23b stores program code or instructions configured to cause the processor 23a to execute processing. The storage unit 23b, i.e., a computer-readable medium, includes any available medium accessible by a general-purpose or special-purpose computer. The detection unit 23 may be configured by a hardware circuit such as an application-specific integrated circuit (ASIC) or a field-programmable gate array (FPGA). The detection unit 23, which is a processing circuit, may include one or more processors operating according to a computer program, one or more hardware circuits such as ASICs or FPGAs, or a combination thereof.

[0033] The detection unit 23 is connected to the camera 21. The detection unit 23 acquires images captured by the camera 21. The detection unit 23 detects whether or not an abnormality has occurred in the loom 10 or weaving based on the images captured by the camera 21. The detection unit 23 of this embodiment detects whether or not an abnormality has occurred in the shedding of the warp threads T based on the images captured by the camera 21.

[0034] <bracket> As shown in FIG. 3, the bracket 24 has a base 40, a camera fixing portion 41 to which the camera 21 is fixed, and a light source fixing portion 42 to which the light source 22 is fixed.

[0035] As shown in FIG. 4, the base 40 is flat. A bolt insertion hole 40a is provided in the base 40. The bolt insertion hole 40a penetrates the base 40 in the thickness direction. The camera fixing portion 41 extends in the thickness direction of the base 40 from a first end portion in the longitudinal direction of the base 40. The light source fixing portion 42 extends in the thickness direction of the base 40 from a second end portion in the longitudinal direction of the base 40. The direction in which the camera fixing portion 41 extends from the base 40 and the direction in which the light source fixing portion 42 extends from the base 40 are the same.

[0036] The bracket 24 is fixed to the protruding portion 18 by threading the bolt 25, which is inserted into the bolt insertion hole 40a of the base 40, into the screw hole 19 of the protruding portion 18. As a result, the camera 21 and the light source 22 are fixed to one of the side frames 11a via the bracket 24. As described above, the protruding portion 18 is located between the main nozzle 14 and the operation unit 17 in the front-to-rear direction of the loom 10. Therefore, the bracket 24, the camera 21, and the light source 22 are located between the main nozzle 14 and the operation unit 17 in the front-to-rear direction of the loom 10. The camera fixing portion 41 and the light source fixing portion 42 each extend upward from the base 40.

[0037] 5, the longitudinal direction of the base 40 coincides with the left-right direction of the loom 10. The camera fixing part 41 and the camera 21 are located to the left of the bolt 25 in the left-right direction of the loom 10. The light source fixing part 42 and the light source 22 are located to the right of the bolt 25 in the left-right direction of the loom 10.

[0038] In this embodiment, the camera 21 takes images from left to right in the left-right direction of the loom 10. In other words, the camera 21 takes images from the upstream side to the downstream side in the weft insertion direction of the weft yarn Y. The camera 21 takes images in a direction inclined with respect to the left-right direction of the loom 10. The camera 21 takes images from the front to the rear in the front-to-rear direction of the loom 10.

[0039] The light source 22 emits light from left to right in the left-right direction of the loom 10. In other words, the light source 22 emits light from upstream to downstream in the weft insertion direction of the weft yarn Y. The direction of light emitted by the light source 22 is inclined with respect to the left-right direction of the loom 10. The light source 22 emits light from the front to the rear in the front-to-rear direction of the loom 10. The direction of light emitted by the light source 22 is inclined with respect to the horizontal direction. The light source 22 emits light from the top to the bottom in the up-down direction of the loom 10.

[0040] <Regulation Department> As shown in Figures 4 and 5, the bracket 24 has a restricting portion 43. In this embodiment, the restricting portion 43 is configured by a pair of restricting plates 43a, 43b. Each of the pair of restricting plates 43a, 43b is flat. Each of the pair of restricting plates 43a, 43b protrudes from the lower surface of the base 40. Of the pair of restricting plates 43a, 43b, one restricting plate 43a is located closer to the first end than the bolt insertion hole 40a in the longitudinal direction of the base 40, and the other restricting plate 43b is located closer to the second end than the bolt insertion hole 40a in the longitudinal direction of the base 40.

[0041] The pair of regulating plates 43a, 43b are arranged to sandwich the protrusion 18 in the left-right direction of the loom 10. Of the pair of regulating plates 43a, 43b, the inner surface of one of the regulating plates 43a abuts against one of the pair of side surfaces 18a, 18b of the protrusion 18. Of the pair of regulating plates 43a, 43b, the inner surface of the other of the pair of regulating plates 43a, 43b abuts against the other of the pair of side surfaces 18a, 18b of the protrusion 18. Therefore, the regulating portion 43 abuts against the protrusion 18, which is a fixed portion of the loom 10. The regulating portion 43 restricts the rotation of the bracket 24 by abutting against the protrusion 18.

[0042] [Operation of this embodiment] The operation of this embodiment will be described. When bracket 24 attempts to rotate relative to one side frame 11a around bolt 25, a pair of restriction plates 43a, 43b come into contact with a pair of side surfaces 18a, 18b of protrusion 18, thereby restricting the rotation of bracket 24. This also restricts the rotation of camera 21 fixed to camera fixing portion 41 of bracket 24, making it possible to keep the shooting range of camera 21 constant.

[0043] [Effects of this embodiment] The effects of this embodiment will be described. (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 abnormalities in the loom 10 or weaving based on images captured by the camera 21. The bracket 24 has a camera fixing unit 41 to 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 threaded hole 19 for an eyebolt B provided in one of the side frames 11a. The bracket 24 has a restriction unit 43 that restricts rotation of the bracket 24 by abutting against a protrusion 18 that serves as a fixing portion of the loom 10.

[0044] With this configuration, when the bracket 24 attempts to rotate around the bolt 25 relative to one of the side frames 11a, the restricting portion 43 abuts against the protrusion 18, thereby restricting the rotation of the bracket 24. This also restricts the rotation of the camera 21 fixed to the camera fixing portion 41 of the bracket 24. This allows the image capture range of the camera 21 to be kept constant. As a result, even if the camera 21 continuously captures images while the loom 10 is in operation, the image capture range of the camera 21 is unlikely to shift, making it easier to process the captured images and compare the images captured during the operation of the loom 10. Furthermore, when the loom abnormality detection device 20 is used on multiple looms 10, the image capture range of the camera 21 is unlikely to vary from loom to loom, making it easier to compare the images captured between multiple looms 10.

[0045] (2) The loom abnormality detection device 20 is equipped with a light source 22 that illuminates the range photographed by the camera 21. The bracket 24 has a light source fixing portion 42 to which the light source 22 is fixed. With this configuration, the rotation of the bracket 24 is restricted by the restricting portion 43, and thus the rotation of the light source 22 fixed to the light source fixing portion 42 of the bracket 24 is also restricted. Therefore, the range illuminated by the light source 22 can be kept constant. Furthermore, the positional relationship between the camera 21 and the light source 22 can be kept constant.

[0046] (3) One side frame 11a has a protrusion 18 as a fixing portion that protrudes from the upper surface 110. The protrusion 18 is rectangular in plan view. The screw hole 19 opens at the tip surface 180 of the protrusion 18. The restricting portion 43 restricts rotation of the bracket 24 by abutting against a pair of side surfaces 18a, 18b of the protrusion 18. The protrusion 18 is an existing component of the loom 10 that has been previously provided on one side frame 11a as a portion into which the tip of the eyebolt B is inserted. This eliminates the need to provide a new fixing portion for the loom 10. Therefore, the loom abnormality detection device 20 can be used on an existing loom 10.

[0047] (4) The restricting portion 43 is composed of a pair of restricting plates 43a, 43b. The pair of restricting plates 43a, 43b are arranged to sandwich the protruding portion 18. With this configuration, compared to when the restricting portion 43 is composed of a single restricting plate, for example, it is easier to keep the shooting range of the camera 21 constant even when intense vibrations are applied to the bracket 24 during operation of the loom 10.

[0048] (5) The threaded holes 19 into which the bolts 25 of the loom abnormality detection device 20 are screwed are existing threaded holes provided for the eyebolts B used when transporting the loom 10. This eliminates the need to provide new threaded holes in the loom 10 for fastening the bracket 24 to one of the side frames 11a. This means that the loom abnormality detection device 20 can be used in existing looms 10.

[0049] (6) The camera 21 is fixed to one of the side frames 11a by the bolts 25. Therefore, it is easier to keep the shooting range of the camera 21 constant compared to when the camera 21 is attached to one of the side frames 11a by a magnetic arm or the like, for example.

[0050] [Example of change] The above embodiment can be modified as follows: The above embodiment and the following modifications can be combined with each other within the scope of technical compatibility.

[0051] In the above embodiment, the regulating portion 43 is composed of a pair of regulating plates 43a, 43b, but it may be composed of either one of the pair of regulating plates 43a, 43b, or it may be composed of three or more regulating plates.

[0052] In the above embodiment, the restricting portion 43 is configured by a pair of restricting plates 43a, 43b protruding from the lower surface of the base 40, but this is not limited to this. Also, the restricting portion 43 restricts the rotation of the bracket 24 by abutting against the protruding portion 18 serving as a fixing portion, but this is not limited to this.

[0053] For example, the rotation of the bracket 24 may be restricted by the side surface of the base 40 of the bracket 24 coming into contact with the back surface 170 of the housing 17b of the operation unit 17, which serves as a fixed portion of the loom 10. In this case, the side surface of the base 40 is the restricting portion 43.

[0054] The operating unit 17 is an existing component of the loom 10 that has been previously provided on one of the side frames 11a as a part for operating the loom 10. Therefore, the rotation of the bracket 24 can be restricted without providing a new fixing portion to the loom 10. Therefore, the loom abnormality detection device 20 can be used on existing looms 10.

[0055] In the above embodiment, the protrusion 18 has a rectangular shape in a plan view. However, the shape of the protrusion 18 is not limited to this. For example, as shown in Fig. 6, the protrusion 18 may be cylindrical in shape, which is circular in plan view. However, in this case, if the restricting portion 43 is configured with the pair of restricting plates 43a, 43b of the above embodiment, it would be difficult to restrict the rotation of the bracket 24. Therefore, the restricting portion 43 is configured as follows.

[0056] As an example, the restricting portion 43 is configured by a pair of restricting protrusions 43c, 43d that protrude from the side surface of the base 40 toward the operating unit 17. The pair of restricting protrusions 43c, 43d each abut against the back surface 170 of the housing 17b of the operating unit 17, which serves as a fixed portion of the loom 10.

[0057] In this case, when bracket 24 attempts to rotate about bolt 25 relative to one side frame 11a in a first direction, one restricting protrusion 43c abuts against rear surface 170 of housing 17b, thereby restricting the rotation of bracket 24. Furthermore, when bracket 24 attempts to rotate about bolt 25 relative to one side frame 11a in a second direction, which is the opposite direction to the first direction, the other restricting protrusion 43d abuts against rear surface 170 of housing 17b, thereby restricting the rotation of bracket 24.

[0058] As another example, when the restricting portion 43 is configured by a pair of restricting plates 43a, 43b protruding from the lower surface of the base 40, the inner surfaces of the pair of restricting plates 43a, 43b are each formed in a curved shape that follows the outer peripheral surface of the protruding portion 18.

[0059] One of the side frames 11a does not have to have the protrusion 18. The screw hole 19 for the eyebolt B may be provided in one of the side frames 11a so as to open on the top surface 110 of the one of the side frames 11a.

[0060] As shown in FIG. 7 , the loom abnormality detection device 20 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. A first imaginary line L1 is an imaginary line that passes through the center of the bolt 25 and extends in the left-right direction of the loom 10. A second imaginary line L2 is an imaginary line that passes through the center of the bolt 25 and extends in the longitudinal direction of the base 40 of the bracket 24. The angle θ of the bracket 24 relative to the left-right direction of the loom 10 is the inclination angle of the second imaginary line L2 relative to the first imaginary line L1. In the example shown in FIG. 7 , the pair of side surfaces 18a, 18b of the protrusion 18 are aligned in the left-right direction of the loom 10. Therefore, the angle θ of the bracket 24 relative to the left-right direction of the loom 10 is adjusted by adjusting the inclination angle of the longitudinal direction of the base 40 of the bracket 24 relative to the pair of side surfaces 18a, 18b of the protrusion 18.

[0061] 7, the adjustment member 26 is made up of a pair of spacers 26a and 26b. Each of the pair of spacers 26a and 26b has a triangular prism shape. One spacer 26a is disposed between the inner surface of one regulating plate 43a and one side surface 18a of the protruding portion 18. One spacer 26a abuts against both the inner surface of one regulating plate 43a and one side surface 18a of the protruding portion 18. One spacer 26a is wedge-shaped and its width decreases from the front to the rear in the front-to-rear direction of the loom 10.

[0062] The other spacer 26b is disposed between the inner surface of the other restricting plate 43b and the other side surface 18b of the protruding portion 18. The other spacer 26b abuts against both the inner surface of the other restricting plate 43b and the other side surface 18b of the protruding portion 18. The other spacer 26b is wedge-shaped and its width increases from the front to the rear in the longitudinal direction of the loom 10.

[0063] In this way, the adjustment member 26 is disposed between the restriction portion 43 and the protrusion 18 so as to abut against both the restriction portion 43 and the protrusion 18. The adjustment member 26 causes the longitudinal direction of the base 40 of the bracket 24 to be inclined with respect to the paired direction of the side surfaces 18a, 18b of the protrusion 18. Therefore, the longitudinal direction of the base 40 of the bracket 24 is inclined with respect to the left-right direction of the loom 10.

[0064] According to this configuration, the angle θ of the bracket 24 with respect to the left-right direction of the loom 10 can be adjusted by the adjustment member 26. This makes it possible to adjust the shooting range of the camera 21 fixed to the camera fixing portion 41 of the bracket 24. Furthermore, when the bracket 24 attempts to rotate relative to one of the side frames 11a around the bolt 25, the restricting portion 43 abuts against the adjustment member 26, and the adjustment member 26 abuts against the protrusion 18, thereby restricting the rotation of the bracket 24. In other words, when the bracket 24 attempts to rotate relative to one of the side frames 11a around the bolt 25, the restricting portion 43 abuts against the protrusion 18 via the adjustment member 26, thereby restricting the rotation of the bracket 24. This makes it possible to maintain a constant shooting range of the camera 21.

[0065] The "regulating portion 43 that regulates the rotation of the bracket 24 by abutting against a fixed portion of the loom 10" includes not only the regulating portion 43 that regulates the rotation of the bracket 24 by directly abutting against the fixed portion as in the above embodiment, but also the regulating portion 43 that regulates the rotation of the bracket 24 by abutting against the fixed portion via the adjustment member 26 as in the above example.

[0066] In addition, one spacer 26a may be wedge-shaped with a width that increases from the front to the rear in the fore-and-aft direction of the loom 10, and the other spacer 26b may be wedge-shaped with a width that decreases from the front to the rear in the fore-and-aft direction of the loom 10.

[0067] The angle formed between the surface of each spacer 26a, 26b that abuts against the restricting portion 43 and the surface that abuts against the protrusion 18 may be changed as appropriate. The larger the angle formed between the surface of each spacer 26a, 26b that abuts against the restricting portion 43 and the surface that abuts against the protrusion 18, the larger the inclination angle of the longitudinal direction of the base 40 of the bracket 24 with respect to the direction in which the pair of side surfaces 18a, 18b of the protrusion 18 form a pair.

[0068] The pair of side surfaces 18a, 18b of the protrusion 18 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.

[0069] As shown in Fig. 8, the loom abnormality detection device 20 may include an adjustment member 26 for adjusting the angle θ of the bracket 24 with respect to the left-right direction of the loom 10. In the example shown in Fig. 8, the back surface 170 of the housing 17b extends along the left-right direction of the loom 10. Therefore, the angle θ of the bracket 24 with respect to the left-right direction of the loom 10 is adjusted by adjusting the inclination angle of the longitudinal direction of the base 40 of the bracket 24 with respect to the back surface 170 of the housing 17b. In the example shown in Fig. 8, the adjustment member 26 is triangular prism-shaped.

[0070] The adjustment member 26 is disposed between the tip surfaces of the pair of restricting protrusions 43c, 43d and the back surface 170 of the housing 17b of the operation unit 17. The adjustment member 26 abuts against the tip surfaces of the pair of restricting protrusions 43c, 43d and the back surface 170 of the housing 17b. The adjustment member 26 is wedge-shaped and its width increases from left to right in the left-right direction of the loom 10.

[0071] In this way, the adjustment member 26 is disposed between the restriction portion 43 and the housing 17b of the operation unit 17 so as to abut against both the restriction portion 43 and the housing 17b. The adjustment member 26 causes the longitudinal direction of the base 40 of the bracket 24 to be inclined with respect to the back surface 170 of the housing 17b. Therefore, the longitudinal direction of the base 40 of the bracket 24 is inclined with respect to the left-right direction of the loom 10.

[0072] According to this configuration, the angle θ of the bracket 24 with respect to the left-right direction of the loom 10 can be adjusted by the adjustment member 26. This makes it possible to adjust the shooting range of the camera 21 fixed to the camera fixing portion 41 of the bracket 24. Furthermore, when the bracket 24 attempts to rotate around the bolt 25 relative to one of the side frames 11a, the restricting portion 43 abuts against the adjustment member 26, which in turn abuts against the housing 17b, thereby restricting the rotation of the bracket 24. In other words, when the bracket 24 attempts to rotate around the bolt 25 relative to one of the side frames 11a, the restricting portion 43 abuts against the housing 17b via the adjustment member 26, thereby restricting the rotation of the bracket 24. This makes it possible to maintain a constant shooting range of the camera 21.

[0073] The adjustment member 26 may be wedge-shaped and have a width that decreases from the left side to the right side in the left-right direction of the loom 10. The angle formed between the surface of adjustment member 26 that abuts against restricting portion 43 and the surface that abuts against back surface 170 of housing 17b may be changed as appropriate. The greater the angle formed between the surface of adjustment member 26 that abuts against restricting portion 43 and the surface that abuts against back surface 170 of housing 17b, the greater the inclination angle of base 40 of bracket 24 in the longitudinal direction with respect to back surface 170 of housing 17b.

[0074] The back surface 170 of the housing 17b may be inclined with respect 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 with respect to the left-right direction of the loom 10 may be 0 degrees.

[0075] The adjustment member 26 does not have to be in the shape of a triangular prism. For example, the adjustment member 26 may be in the shape of a rectangular parallelepiped. In the example shown in Figure 7, one spacer 26a of the adjustment member 26 may be formed integrally with one regulating plate 43a of the regulating portion 43, and the other spacer 26b of the adjustment member 26 may be formed integrally with the other regulating plate 43b of the regulating portion 43.

[0076] In the example shown in FIG. 8, the adjustment member 26 may be formed integrally with the restriction portion 43 of the bracket 24. As shown in Fig. 9, the bracket 24 may have an arm 44 that stands upright from the front end of the base 40 in the front-to-rear direction of the loom 10 and extends in the left-to-right direction of the loom 10. In the example shown in Fig. 9, the camera fixing part 41 extends from a first end of the arm 44 toward the rear in the front-to-rear direction of the loom 10. The light source fixing part 42 extends from a second end of the arm 44 toward the rear in the front-to-rear direction of the loom 10. In this case, the length of the base 40 in the left-to-right direction of the loom 10 can be shortened, and therefore, even if a component is present around the protrusion 18, the base 40 can be prevented from interfering with the component.

[0077] 9, the restricting portion 43 is configured by a pair of restricting plates 43a, 43b extending from the underside of the base 40, but is not limited to this. The front surface of the arm 44 may abut against the rear surface 170 of the housing 17b of the operation unit 17, thereby restricting the rotation of the bracket 24. In this case, since the arm 44 is the restricting portion 43, the pair of restricting plates 43a, 43b may be omitted.

[0078] Although not shown, the arm 44 may be erected upward from the rear end of the base 40 in the front-to-rear direction of the loom 10 and extend in the left-to-right direction of the loom 10. The camera fixing part 41 extends, for example, from a first end of the arm 44 toward the front in the front-to-rear direction of the loom 10. The light source fixing part 42 extends, for example, from a second end of the arm 44 toward the front in the front-to-rear direction of the loom 10. In this case, too, the length of the base 40 in the left-to-right direction of the loom 10 can be shortened, so that even if a component is present around the protrusion 18, the base 40 can be prevented from interfering with the component.

[0079] Although not shown, the arm 44 may have a first arm portion extending upward from the base 40 and a second arm portion extending from the upper end of the first arm portion in the left-right direction of the loom 10. The camera fixing portion 41 extends downward from the first end of the second arm portion. The light source fixing portion 42 extends downward from the second end of the second arm portion. In this case, too, the length of the base 40 in the left-right direction of the loom 10 can be shortened, so even if parts are present around the protrusion 18, the base 40 can be prevented from interfering with those parts.

[0080] In the above embodiment, the camera fixing portion 41 and the camera 21 are positioned to the left 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 positioned to the right of the bolt 25 in the left-right direction of the loom 10, but this is not limited to this.

[0081] For example, the camera fixing part 41 and the camera 21 may be positioned to the right of the bolt 25 in the left-right direction of the loom 10, and the light source fixing part 42 and the light source 22 may be positioned to the left of the bolt 25 in the left-right direction of the loom 10.

[0082] For example, the camera fixing part 41, the light source fixing part 42, the camera 21, and the light source 22 may be disposed to the right or left of the bolt 25 in the left-right direction of the loom 10. The loom abnormality detection device 20 does not have to include the light source 22.

[0083] The camera 21 and the light source 22 may be unitized and fixed to the bracket 24. In this case, the camera fixing portion 41 also serves as the light source fixing portion .

[0084] The light source 22 may be fixed to one of the side frames 11a by being fixed to a bracket separate from the bracket 24 to which the camera 21 is fixed. The loom abnormality detection device 20 in the above embodiment detects an abnormality in the shedding of the warp threads T. However, it may detect an abnormality other than the shedding of the warp threads T.

[0085] For example, the loom abnormality detection device 20 may detect abnormalities in the loom 10, such as the main nozzle 14, the tandem nozzle, the EDP (measuring drum), the ABS (weft tension compensation device), or the cutter. In this case, as in the above embodiment, the bracket 24 is fixed to one of the side frames 11a by threading the bolt 25 inserted into the bolt insertion hole 40a of the base 40 into the threaded hole 19 for the eyebolt B provided in one of the side frames 11a. Therefore, the camera 21 and the light source 22 fixed to the bracket 24 are also fixed to one of the side frames 11a.

[0086] For example, the loom abnormality detection device 20 may detect an abnormality in the shed of the warp yarn T from the outlet T2 side, or may detect an abnormality in a weft arrival sensor that detects whether the weft yarn Y has reached the outlet T2 of the shed of the warp yarn T. In this case, the bracket 24 is fixed to the other side frame 11b by threading the bolt 25 inserted into the bolt insertion hole 40a of the base 40 into a screw hole for an eyebolt B (not shown) provided in the other side frame 11b. Therefore, the camera 21 and the light source 22 fixed to the bracket 24 are also fixed to the other side frame 11b.

[0087] The loom abnormality detection device 20 may be used in looms other than air jet looms, such as water jet looms. [Note] The technical ideas that can be understood from the above-described embodiment and modifications will be described below.

[0088] <Appendix 1> An abnormality detection device for a loom comprising: a camera; a detection unit that detects abnormalities in the loom or weaving based on images captured by the camera; a bracket having a camera fixing unit to which the camera is fixed; and a bolt that is inserted into a bolt insertion hole provided in the bracket and screwed into a screw hole for an eyebolt provided in a side frame of the loom, wherein the bracket has a regulating unit that regulates rotation of the bracket by abutting against a fixed portion that is a part of the loom whose position does not change.

[0089] <Appendix 2> 2. The abnormality detection device for a loom according to claim 1, further comprising a light source that illuminates the range of photography by the camera, and the bracket having a light source fixing portion to which the light source is fixed.

[0090] <Appendix 3> The side frame has a protruding portion as the fixing portion protruding from an upper surface, the protruding portion has a rectangular shape in a plan view, the screw hole opens at a tip surface of the protruding portion, and the restricting portion restricts rotation of the bracket by abutting against a side surface of the protruding portion.

[0091] <Appendix 4> The abnormality detection device for a loom according to Appendix 3, wherein the regulating portion is constituted by a pair of regulating plates, and the pair of regulating plates are arranged to sandwich the protrusion.

[0092] <Appendix 5> The loom has an operation unit as the fixed portion provided on the side frame, and the restriction unit restricts rotation of the bracket by abutting against a back surface of a housing of the operation unit.

[0093] <Appendix 6> The abnormality detection device for a loom described in any one of appendices 1 to 5 further includes an adjustment member that is arranged between the regulating portion and the fixed portion so as to abut against each of the regulating portion and the fixed portion, and that adjusts the angle of the bracket with respect to the left-right direction of the loom. [Explanation of symbols]

[0094] 10...loom, 11a...side frame, 17...operating part as fixed part, 17b...housing, 18...protruding part as fixed part, 18a...side surface, 18b...side surface, 19...screw hole, 20...abnormality detection device for loom, 21...camera, 22...light source, 23...detection part, 24...bracket, 25...bolt, 26...adjustment member, 40a...bolt insertion hole, 41...camera fixing part, 42...light source fixing part, 43...regulating part, 43a...regulating plate, 43b...regulating plate, 110...top surface, 170...rear surface, 180...tip surface, B...eyebolt.

Claims

1. A camera and a detection unit that detects abnormalities in the loom or weaving based on the images captured by the camera; a bracket having a camera fixing portion to which the camera is fixed; a bolt that is inserted into a bolt insertion hole provided in the bracket and screwed into a threaded hole for an eyebolt provided in a side frame of the loom; An abnormality detection device for a loom comprising: The bracket has a restricting portion that restricts rotation of the bracket by abutting against a fixed portion that is a portion of the loom that does not change position.

2. a light source that illuminates a photographing range of the camera; The abnormality detection device for a loom according to claim 1, wherein the bracket has a light source fixing portion to which the light source is fixed.

3. the side frame has a protrusion as the fixing portion protruding from an upper surface, The protrusion has a rectangular shape in a plan view, the screw hole is open at a tip end surface of the protrusion, The abnormality detection device for a loom according to claim 1, wherein the restricting portion restricts rotation of the bracket by abutting against a side surface of the protruding portion.

4. The restricting portion is composed of a pair of restricting plates, The abnormality detection device for a loom according to claim 3, wherein the pair of regulating plates are arranged to sandwich the protruding portion.

5. The loom has an operation unit as the fixed portion provided on the side frame, The abnormality detection device for a loom according to claim 1, wherein the restricting portion restricts rotation of the bracket by abutting against a rear surface of a housing of the operating portion.

6. 2. The abnormality detection device for a loom according to claim 1, further comprising an adjustment member disposed between the regulating portion and the fixed portion so as to abut against each of the regulating portion and the fixed portion, the adjustment member adjusting the angle of the bracket relative to the left-right direction of the loom.

Images