Shooting fixture

Abstract

To provide an imaging fixture for positioning a camera at a joint between pipes.SOLUTION: An imaging fixture (1) is provided, comprising peripheral surface contacts (11) to be in contact with an outer peripheral surface of a first pipe (210), a frame shaft (12) supported by the peripheral surface contacts, a connecting bar (14) configured to rotate about a rotation shaft (13) provided on the frame shaft, and an end contact (15) having a contact surface (15a) to be in contact with an end surface of a socket of the first pipe, the contact surface having a tapered shape.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an imaging tool for mounting a camera for imaging a joint between pipes. [Background technology]

[0002] Conventionally, for water supply pipes, sewerage pipes, etc., a so-called push-on type pipe joint structure has been adopted, in which the insertion port of one pipe is inserted into the receiving port of the other pipe and a sealing material is compressed between the inner surface of the receiving port and the outer surface of the insertion port.

[0003] Pipes with this type of pipe joint structure are inspected to see if the pipes are properly joined. For example, Patent Document 1 discloses a pipe inspection photography jig that includes an annular portion to which multiple cameras are attached, and that is arranged to surround the periphery of the pipe to photograph the inside of the socket from the axial direction of the pipe. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2016-50770 A Summary of the Invention [Problem to be solved by the invention]

[0005] Here, it is necessary to join the pipes so that the bending angle at the joint is within an allowable range. However, the technology of Patent Document 1 takes images from the axial direction of the pipes, so it is sometimes difficult to apply it to inspecting the bending angle at the joint.

[0006] One aspect of the present invention has been made in consideration of the above-mentioned problems in the conventional art, and its object is to provide a photography tool that can position a camera radially relative to a joint between pipes and photograph the joint. [Means for solving the problem]

[0007] In order to solve the above problems, one embodiment of the present invention provides a photographing jig for photographing a joint between a first tube and a second tube inserted into a receiving port of the first tube, the photographing jig comprising: a circumferential abutment portion that abuts against the outer peripheral surface of the first tube; a frame axis supported by the circumferential abutment portion; a connecting bar that rotates around a rotation axis provided on the frame axis; an end surface abutment portion that has an abutment surface that abuts against an end surface of the receiving port and is provided at the tip of the connecting bar; and a support portion that supports a camera so as to image the joint from the radial direction of the first tube and is fixed to the frame axis, the abutment surface having a tapered shape that is inclined toward the first tube relative to the connecting bar. Effect of the Invention

[0008] According to one aspect of the present invention, it is possible to provide an imaging tool capable of positioning a camera radially relative to a joint between pipes and imaging the joint. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a diagram showing the overall configuration of an imaging tool. [Diagram 2] FIG. 4 is a front view showing the configuration of a peripheral contact portion. [Diagram 3] 13 is a side view showing the configuration of a rotating shaft, a connecting bar, and an end surface abutment portion. FIG. [Figure 4] FIG. 2 is a plan view showing the configuration of a first specific example of a support portion. [Diagram 5] FIG. 5 is an end view of line VV in FIG. [Figure 6] FIG. 13 is a diagram showing an example of use of the photographing tool. [Figure 7] FIG. 2 is a diagram showing the configuration of the lower part of the handle. [Figure 8] FIG. 2 is a diagram showing the configuration of a first specific example of a handle. [Figure 9] FIG. 11 is a plan view showing the configuration of a second specific example of a support portion. [Figure 10] 10 is a cross-sectional view taken along line XX in FIG. [Figure 11] FIG. 11 is a plan view showing the configuration of a third specific example of a support portion. [Figure 12] 13A to 13C are diagrams showing the outline of the configurations of a locking member and a releasing member in a third specific example of a support portion. [Figure 13] FIG. 13 is a plan view showing the configuration of a fourth specific example of a support portion. [Figure 14] 13A to 13C are diagrams showing the outline of the configurations of a locking member and a releasing member in a fourth specific example of a support portion. [Figure 15] FIG. 13 is a plan view showing the configuration of a fifth specific example of a support portion. [Figure 16] 13A and 13B are diagrams showing the outline of the configuration of a release member in a fifth specific example of a support portion. [Figure 17] 13A to 13C are diagrams showing a state in which a user operates an operation portion in a fifth specific example of the support portion. [Figure 18] FIG. 13 is a plan view showing the configuration of a sixth specific example of the support portion. [Figure 19] 13A to 13C are side views showing the operation of a locking portion in the sixth specific example of the support portion. [Figure 20] FIG. 13 is a diagram showing the configuration of a second specific example of a handle. [Figure 21] 11A and 11B are diagrams illustrating the movement of a handle when a lever is operated. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] [Embodiment 1] An embodiment of the present invention will be described in detail below with reference to Figures 1 to 8. However, the following description is an example of an imaging tool according to the present invention, and the technical scope of the present invention is not limited to the illustrated example. Three directions indicated by arrows in each figure are the front-back direction (axial direction) X, the up-down direction (radial direction) Y, and the left-right direction (radial direction) Z.

[0011] (Configuration of shooting jig 1) Fig. 1 is a diagram showing the overall configuration of the photographing jig 1. In Fig. 1, reference numeral 101 is a perspective view, and reference numeral 102 is a top view. As indicated by reference numeral 102 in Fig. 1, the photographing jig 1 is for photographing a joint between a first pipe 210 and a second pipe 220 inserted into a socket 211 of the first pipe 210. As shown in Fig. 1, the photographing jig 1 includes a peripheral surface abutment portion 11, a frame shaft 12, a rotating shaft 13, a connecting bar 14, an end surface abutment portion 15, and a support portion 16.

[0012] The circumferential surface abutment parts 11 abut against the outer circumferential surface of the first tube 210. In the example shown in Fig. 1, the photographing jig 1 includes two circumferential surface abutment parts 11 arranged along the tube axis 212 of the first tube 210. However, the photographing jig 1 may include three or more circumferential surface abutment parts 11 arranged along the tube axis 212. The specific configuration of the circumferential surface abutment parts 11 will be described later.

[0013] The frame shaft 12 is supported by the peripheral surface abutment portion 11. The frame shaft 12 functions as a main body portion to which other portions of the photographing jig 1 are connected. The frame shaft 12 has a square prism shape that fits along the first tube 210. However, the shape of the frame shaft 12 is not limited to this, and may be, for example, a cylindrical shape.

[0014] 1, the frame axis 12 overlaps with the tube axis 212 of the first tube 210 in a plan view when the imaging tool 1 is in use. Therefore, it is easier for a user to place the imaging tool 1 on the first tube 210, compared to a case where the frame axis 12 is offset from the tube axis 212 in a plan view when the imaging tool 1 is in use.

[0015] The pivot shaft 13 is provided on the frame shaft 12. The connecting bar 14 pivots around the pivot shaft 13. The end face abutment portion 15 is provided at the tip of the connecting bar 14. The end face abutment portion 15 has an abutment surface 15a that abuts against the end face of the socket 211.

[0016] The contact surface 15a has a tapered shape that is inclined relative to the connecting bar 14 in a direction approaching the first pipe 210. The specific configurations of the rotating shaft 13, the connecting bar 14, and the end surface contact portion 15 will be described later.

[0017] The support part 16 supports the camera 110 so as to capture an image of the joint between the first pipe 210 and the second pipe 220 from the radial direction of the first pipe 210. The support part 16 is fixed to the frame shaft 12. Specifically, the support part 16 is fixed to the frame shaft 12 so that the camera 110 supported by the support part 16 is disposed at a position radially spaced from the socket 211 in a state in which the abutment surface 15a abuts against the end face of the socket 211. The specific configuration of the support part 16 will be described later.

[0018] The photographing jig 1 further includes a handle 17 for allowing a user to move the photographing jig 1 along the axial direction of the first tube 210 with the peripheral surface contact portion 11 in contact with the outer circumferential surface of the first tube 210. An upper portion of the handle 17 is omitted in the reference numeral 101 in Fig. 1. A specific configuration of the handle 17 will be described later.

[0019] (Configuration of peripheral contact portion 11) Fig. 2 is a front view showing the configuration of the circumferential surface abutment portion 11. Fig. 2 also shows the outer circumferential surfaces of first tubes 210 of a plurality of diameters that abut against the circumferential surface abutment portion 11. However, in Fig. 2, for ease of visibility, only some of the first tubes 210 are labeled with reference numerals. As shown in Fig. 2, the circumferential surface abutment portion 11 includes a first abutment portion 11a and a second abutment portion 11b.

[0020] The first contact portion 11a contacts the side surface of the first tube 210 in a plane perpendicular to the axis of the first tube 210 when the diameter of the first tube 210 is less than a predetermined value. The second contact portion 11b contacts the side surface of the first tube 210 in a plane perpendicular to the axis of the first tube 210 when the diameter of the first tube 210 is equal to or greater than a predetermined value. The predetermined value may be determined by the designer of the imaging jig 1 according to the expected range of diameters of the first tube 210 and the ratio of the number of first tubes 210 for each diameter, and may be, for example, 150 mm.

[0021] In the example shown in Fig. 2, the circumferential surface contact portion 11 has two second contact portions 11b. The two second contact portions 11b are located on both sides of the first contact portion 11a. However, the circumferential surface contact portion 11 only needs to have at least two second contact portions 11b, and may have three or more. When the circumferential surface contact portion 11 has three or more second contact portions 11b, it is sufficient that at least two of them are located on both sides of the first contact portion 11a.

[0022] The first contact portion 11a is formed so as to be recessed more toward the outside in the radial direction of the first tube 210 than the second contact portion 11b. Furthermore, the interval between the second contact portions 11b located on both sides of the first contact portion 11a is larger than the minimum diameter assumed for the first tube 210. The first tube 210 having a diameter smaller than the interval between the second contact portions 11b enters between the second contact portions 11b and abuts against the first contact portions 11a. On the other hand, the first tube 210 having a diameter equal to or larger than the interval between the second contact portions 11b abuts against the second contact portions 11b without entering between the second contact portions 11b.

[0023] Therefore, according to the peripheral surface abutment portion 11, as the diameter of the first tube 210 increases, the distance between the first tube 210 and the camera 110 increases. Therefore, the difference in size of the first tube 210 in the image captured by the camera 110 caused by the difference in diameter of the first tube 210 is reduced. That is, an image of the first tube 210 can be captured at a size appropriate for inspecting the joint between the first tube 210 and the second tube 220.

[0024] (Configuration of end face abutment portion 15) 3 is a side view showing the configuration of the rotating shaft 13, the connecting bar 14, and the end surface abutment portion 15. The rotating shaft 13 extends in the left-right direction. As described above, the frame axis 12 on which the rotating shaft 13 is provided overlaps the tube axis 212 of the first tube 210 in a plan view. Therefore, the connecting bar 14 and the end surface abutment portion 15 rotate around the rotating shaft 13 within a plane including the tube axis 212.

[0025] As described above, the contact surface 15a has a tapered shape that is inclined toward the first tube 210 with respect to the connecting bar 14. Specifically, the tapered shape of the contact surface 15a is a shape in which the angle between the contact surface 15a and the connecting bar 14 is greater than 90°. The "angle between the contact surface 15a and the connecting bar 14" here refers to the angle between the contact surface 15a and one of the side surfaces of the connecting bar 14 that extends from the connection point between the contact surface 15a and the connecting bar 14 toward the rotation shaft 13.

[0026] Because abutment surface 15a has such a tapered shape, even if the diameter of first tube 210 fluctuates, the boundary between abutment surface 15a and connecting bar 14 abuts against the outer periphery of the end face of socket 211 of first tube 210. Therefore, the fluctuation in the horizontal distance between the pivot shaft 13 and the position where abutment surface 15a and the end face of socket 211 abut, which is caused by the fluctuation in the diameter of first tube 210, can be reduced.

[0027] Furthermore, the angle formed between the abutment surface 15a and the connecting bar 14 may be 120° or less. In particular, the angle formed between the abutment surface 15a and the connecting bar 14 may be 100° or less, for example, 95°. If the angle formed between the abutment surface 15a and the connecting bar 14 is within such a range, as described above, it is possible to reduce the variation in the horizontal distance between the pivot shaft 13 and the position where the abutment surface 15a and the end face of the socket 211 abut against each other, which is caused by the variation in the diameter of the first tube 210.

[0028] 1, the end face abutment portion 15 includes an aiming pin 15b. The aiming pin 15b extends in the radial direction of the first tube 210 when the end face abutment portion 15 abuts against the end face of the first tube 210. In the axial direction of the first tube 210, the position of the aiming pin 15b is substantially equal to the position of the abutment surface 15a. The aiming pin 15b extends to a position farther away from the axis of the first tube 210 than the end of the support portion 16 in a plan view.

[0029] When the photographing jig 1 is in use, the end face abutment portion 15, particularly the abutment surface 15a, may be located in the shadow of the support portion 16 and may not be visible to the user. Even in such a case, the aiming pin 15b extends to the above-mentioned position, so that the user can see the aiming pin 15b.

[0030] Therefore, the user can recognize the position of the contact surface 15a in the tube axis direction of the first tube 210 from the position of the aiming pin 15b. Therefore, the user can easily bring the contact surface 15a into contact with the end surface of the socket 211 of the first tube 210.

[0031] 1, the aiming pin 15b extends on both sides of the end surface abutment portion 15 in the left-right direction. However, the aiming pin 15b may extend on only one side of the end surface abutment portion 15 in the left-right direction.

[0032] (Configuration of Support Part 16) Fig. 4 is a plan view showing the configuration of a support part 16-1, which is a first specific example of the support part 16. As shown in Fig. 4, the support part 16-1 includes a placement part 16a, a fixed claw 16b (fitting part), and a deforming claw 16c (pushing part).

[0033] The mounting portion 16a is a platform on which the camera 110 is placed. An opening 16aa that opens toward the first pipe 210 is formed in the mounting portion 16a.

[0034] FIG. 5 is a VV line end view in FIG. 4. FIG. 5 shows the shapes of both side surfaces of the opening 16aa in the left-right direction. The shapes of both side surfaces of the opening 16aa in the front-rear direction are the same as the shapes of both side surfaces in the left-right direction. As shown in FIG. 5, the wall surface of the opening 16aa has a shape that spreads from the camera 110 toward the first tube 210. In other words, the opening 16aa has a shape that spreads from the upper side toward the lower side in the up-down direction. Therefore, the reflected light caused by the flash light reflected by the wall surface of the opening 16aa during shooting by the camera 110 is reduced. Therefore, the deterioration of the inspection accuracy caused by the reflected light being reflected in the image captured by the camera 110 is also reduced.

[0035] The fixed claw 16b is a claw-shaped member protruding upward from the side of the mounting portion 16a. The fixed claw 16b has a barb 16ba near the tip thereof that extends in a substantially horizontal direction relative to the mounting portion 16a. The fixed claw 16b has an opposing surface 16bb below the barb 16ba that faces the side surface of the camera 110.

[0036] The deforming claw 16c is a claw-shaped member protruding upward from the side of the mounting portion 16a. The deforming claw 16c has a barb 16ca near the tip, which extends in a substantially horizontal direction relative to the mounting portion 16a. The deforming claw 16c has a pressing surface 16cb below the barb 16ca, which presses the side surface of the camera 110 toward the facing surface 16bb.

[0037] The deformable claw 16c has a leaf spring at the attachment point to the mounting portion 16a. Specifically, the attachment point of the deformable claw 16c to the mounting portion 16a is divided into three parts along the outer edge of the mounting portion 16a. The parts at both ends are fixed to the mounting portion 16a, and the central part bends to exert elastic force.

[0038] When camera 110 is placed on placement portion 16a of support portion 16-1, deformable claw 16c presses camera 110 toward opposing surface 16bb due to the elastic force of the leaf spring, resulting in camera 110 being supported by fixed claw 16b and deformable claw 16c.

[0039] In the example shown in FIG. 4, the support portion 16-1 includes three fixed claws 16b and two deformed claws 16c. Two of the three fixed claws 16b are disposed at positions abutting against the long sides when the camera 110 is viewed in a plan view. The remaining fixed claw 16b is disposed at a position abutting against the short sides when the camera 110 is viewed in a plan view. One of the two deformed claws 16c is disposed at a position abutting against the short sides that the fixed claws 16b do not abut when the camera 110 is viewed in a plan view. The remaining deformed claw 16c is disposed at a position abutting against the long sides that the fixed claws 16b do not abut when the camera 110 is viewed in a plan view.

[0040] However, the number of fixed claws 16b provided on support portion 16-1 is not limited to this, and it is sufficient that at least one fixed claw 16b abuts on each of one short side and one long side when viewed in a plan view of camera 110. In addition, the number of deformed claws 16c provided on support portion 16-1 is not limited to this, and it is sufficient that at least one deformed claw 16c abuts on each of the short side and long side that are not abutted by fixed claws 16b when viewed in a plan view of camera 110.

[0041] (Structure of handle 17) Fig. 6 is a diagram showing an example of use of the photographing jig 1. For example, as shown in Fig. 6, the photographing jig 1 is used in a state in which the first pipe 210 and the second pipe 220 are installed in the excavation trench 230. In Fig. 6, reference numerals 601 and 602 indicate an example in which the user 240 uses the photographing jig 1 from different sides of the excavation trench 230.

[0042] The handle 17 has a support 17a and a gripping portion 17b. The gripping portion 17b is a portion that is gripped by a user 240. The support 17a is a columnar portion that connects the gripping portion 17b to the frame axis 12. The user 240 grips the gripping portion 17b and moves the imaging jig 1 along the first pipe 210.

[0043] The grip portion 17b and the support 17a are, for example, cylindrical or rectangular prism shaped. The support 17a is connected to a side surface of the cylindrical or rectangular prism shaped grip portion 17b. The connection portion of the grip portion 17b with the support 17a is a portion that is difficult for the user 240 to grip.

[0044] For this reason, it is preferable that the connection point of the grip portion 17b of the handle 17 with the support pillar 17a is changeable. For example, the grip portion 17b may be slidable relative to the support pillar 17a. Alternatively, the grip portion 17b may be rotatable around the axis of the support pillar 17a. With the handle 17 having such a configuration, as shown in FIG. 6, the user 240 can easily grip the grip portion 17b regardless of which side of the excavation trench 230 the user 240 is on.

[0045] 7 is a diagram showing the configuration of the lower part of the handle 17. At the lower part of the handle 17, the support post 17a is connected to the frame shaft 12 via a first handle rotation shaft 17c. The first handle rotation shaft 17c is a rotation shaft parallel to the axial direction of the first pipe 210. The handle 17 is rotatable around the first handle rotation shaft 17c.

[0046] The handle 17 has a configuration capable of maintaining a state rotated to either ±7.5° or ±15°, with a state in which the handle is not rotated to either the left or right being 0°. In FIG. 7, reference numeral 701 indicates a state in which the handle 17 is not rotated to either the left or right. Reference numeral 702 indicates a state in which the handle 17 is rotated 7.5° in one direction. Reference numeral 703 indicates a state in which the handle 17 is rotated 15° in one direction. However, the handle 17 may have a configuration capable of maintaining a state rotated to an angle different from the above.

[0047] The photographing jig 1 further includes a stopper 17d. The handle 17 is engaged with the stopper 17d, thereby stopping the rotation of the handle 17 around the first handle rotation shaft 17c. The stopper 17d is a plate-like member having a plurality of openings 17e.

[0048] Fig. 8 is a diagram showing the configuration of handle 17-1, which is a first specific example of handle 17. As shown in Fig. 8, in handle 17-1, support 17a is provided with protrusion 17f that fits into one of a plurality of openings 17e. When protrusion 17f fits into one of openings 17e, handle 17-1 is locked by stopper 17d. As a result, handle 17-1 can be maintained in a state rotated to one of the angles described above.

[0049] 8, reference numeral 801 indicates a state in which the support column 17a is not tilted, and reference numeral 802 indicates a state in which the support column 17a is tilted. The handle 17-1 has a configuration that allows the support column 17a to be tilted with respect to the stopper 17d.

[0050] Specifically, the handle 17-1 can rotate around a lower end 17g (second handle rotation shaft) of the support 17a. The lower end 17g has a curved shape that abuts against the frame shaft 12. When the support 17a is not tilted with respect to the stopper 17d, the handle 17-1 is engaged with the stopper 17d as shown by reference numeral 801. When the support 17a is tilted with respect to the stopper 17d, the handle 17-1 is not engaged with the stopper 17d as shown by reference numeral 802. That is, the handle 17-1 can be switched between a state where it is engaged with the stopper 17d and a state where it is not engaged with the stopper 17d by rotating around the lower end 17g.

[0051] The procedure for changing the angle of the handle 17-1 around the first handle rotation shaft 17c is as follows. First, the user 240 tilts the support 17a relative to the stopper 17d so that the handle 17-1 is not engaged with the stopper 17d. Next, the user 240 rotates the handle 17-1 around the first handle rotation shaft 17c to a desired angle while keeping the support 17a tilted relative to the stopper 17d. After that, the user 240 releases the support 17a from being tilted relative to the stopper 17d.

[0052] 6, the angle of the handle 17-1 around the first handle rotation shaft 17c can be changed to an appropriate angle according to the position of the user 240. Therefore, the convenience of the photographing jig 1 is improved.

[0053] (Method of positioning camera 110 using photographing tool 1) The method for positioning the camera 110 using the photographing jig 1 is as follows. First, the user places the photographing jig 1 on the outer circumferential surface of the first pipe 210. At this time, the circumferential surface abutment portion 11 abuts against the outer circumferential surface of the first pipe 210. Also, at this time, the user positions the end surface abutment portion 15 forward of the end surface of the socket 211 of the first pipe 210.

[0054] Next, the user grips the handle 17 and moves the photographing jig 1 backward. At this time, the end face abutment portion 15 and the connecting bar 14 rotate around the rotation shaft 13, so that the abutment surface 15a abuts against the end face of the socket 211. This completes the positioning of the camera 110 with respect to the joint between the first pipe 210 and the second pipe 220.

[0055] (Effect of shooting jig 1) As described above, in the photographing jig 1, the peripheral contact portion 11 is brought into contact with the outer circumferential surface of the first pipe 210, and the contact surface 15a of the end contact portion 15 is brought into contact with the end surface of the socket 211 of the first pipe 210. Since the contact surface 15a has a tapered shape, even if the diameter of the first pipe 210 varies, the change in the positional relationship between the camera 110 supported by the support portion 16 and the socket 211 is small. Therefore, according to the photographing jig 1, for first pipes 210 of a plurality of diameters, the camera 110 can be positioned at an appropriate position with respect to the joint between the first pipe 210 and the second pipe 220, and the joint can be photographed. Specifically, a single photographing jig 1 can accommodate first pipes 210 of a wide range of diameters, for example, from 75 mm to 450 mm.

[0056] In addition, the photographing jig 1 improves the accuracy of inspection of the suitability of joints between pipes using images taken by the camera 110. This improves the efficiency of laying water pipes, etc. This can contribute to the achievement of goals 6 and 7 of the Sustainable Development Goals (SDGs).

[0057] [Embodiment 2] Other embodiments of the present invention will be described below. In embodiment 2, a specific example of the support part 16 different from that of embodiment 1 will be described. For convenience of explanation, the same reference numerals will be given to members having the same functions as those described in the above embodiment, and the explanations thereof will not be repeated.

[0058] Fig. 9 is a plan view showing the configuration of a support part 16-2, which is a second specific example of the support part 16. As shown in Fig. 9, the support part 16-2 includes a placement part 16a, a side wall 16d, a pressing member 16e (fitting part), and a locking member 16f (pushing part).

[0059] Side wall 16d abuts against a side of camera 110 placed on placement section 16a. Side wall 16d has a shape that abuts against one long side and both short sides of camera 110 when viewed from above. However, side wall 16d does not necessarily have to abut against the entire long side and the entire short side when camera 110 is viewed from above.

[0060] The holding member 16e holds down from above a part of the camera 110 placed on the placement portion 16a. The holding member 16e is disposed on both ends of a portion of the side wall 16d that abuts against a long side of the camera 110 when viewed in a plan view.

[0061] Fig. 10 is a cross-sectional view taken along line XX in Fig. 9. Fig. 10 shows an insertion space in pressing member 16e into which camera 110 is inserted. Pressing member 16e has an opposing surface 16ea that faces the side surface of camera 110 on the inner side of the insertion space.

[0062] In support portion 16-2, the insertion space becomes smaller along the direction in which camera 110 is inserted. Specifically, as shown in Fig. 10, when the height of the insertion space on the front side in the direction in which camera 110 is inserted is H1 and the height of the insertion space on the back side is H2, H1>H2.

[0063] Because the fitting space has such a shape, camera 110 pushed into the fitting space by locking member 16f is clamped between mounting portion 16a and pressing member 16e. Therefore, camera 110 can be fixed more firmly than if the fitting space did not have such a shape.

[0064] The locking member 16f presses the camera 110 toward the pressing member 16e. The locking member 16f protrudes upward from the end of the mounting portion 16a. A barb is formed near the tip of the locking member 16f and extends in a substantially horizontal direction relative to the mounting portion 16a.

[0065] The locking member 16f is attached to the mounting portion 16a via a helical spring 16fa. The helical spring 16fa biases the locking member 16f in a direction toward the mounting portion 16a. In addition, by applying a force to the locking member 16f in a direction away from the mounting portion 16a, the helical spring 16fa can be deformed and the locking member 16f can be displaced.

[0066] When placing the camera 110 on the placement portion 16a of the support portion 16-2, the user moves the locking member 16f away from the placement portion 16a and fits the camera 110 into the holding member 16e. In this state, by returning the locking member 16f to its original position, the elastic force of the helical spring 16fa presses the camera 110 toward the opposing surface 16ea.

[0067] [Embodiment 3] Other embodiments of the present invention will be described below. In embodiment 3, a specific example of the support portion 16 different from the above embodiments will be described.

[0068] Fig. 11 is a plan view showing the configuration of a support part 16-3, which is a third specific example of the support part 16. As shown in Fig. 11, the support part 16-3 has the same configuration as the support part 16-2, except that the support part 16-3 includes a locking member 16g (push-in part) and a release member 16h instead of the locking member 16f.

[0069] Locking member 16g presses camera 110 toward retaining member 16e in the same manner as locking member 16f. Release member 16h receives an operation by the user to release camera 110 pressed by locking member 16g.

[0070] Fig. 12 is a diagram showing the outline of the configuration of the lock member 16g and the release member 16h. As shown in Fig. 12, the lock member 16g includes a contact portion 16ga, a support 16gb, and a helical spring 16gc. The release member 16h includes a block 16ha and a helical spring 16hb.

[0071] The contact portion 16ga is a portion that contacts the camera 110. The support pillar 16gb is a portion that is fixed to the contact portion 16ga. The helical spring 16gc is a spring having one end attached to the support pillar 16gb and the other end attached to the mounting portion 16a. The helical spring 16gc biases the contact portion 16ga in a direction away from the mounting portion 16a, opposite to the helical spring 16fa biasing the contact portion 16ga against the locking member 16f.

[0072] The block 16ha is a portion that comes into contact with the support 16gb. The helical spring 16hb is a spring having one end attached to the block 16ha and the other end attached to a member separate from the block 16ha. The other end of the helical spring 16hb may be attached to, for example, the mounting portion 16a. The helical spring 16hb biases the block 16ha in a direction toward the support 16gb.

[0073] An uneven portion 16gd is formed on the portion of the pillar 16gb where the block 16ha abuts. An uneven portion 16hc is formed on the portion of the block 16ha where the pillar 16gb abuts. The uneven portion 16gd and the uneven portion 16hc mesh with each other when the abutment portion 16ga abuts against the camera 110.

[0074] When the camera 110 is supported by the support portion 16-3, the lock member 16g is pushed in so that the contact portion 16ga contacts the camera 110 with the camera 110 fitted under the pressing member 16e. As described above, the contact portion 16ga is biased by the helical spring 16gc in a direction away from the mounting portion 16a. However, when the contact portion 16ga contacts the camera 110, the uneven portion 16hc of the block 16ha biased by the helical spring 16hb meshes with the uneven portion 16gd of the support 16gb. As a result, the contact portion 16ga is not displaced when it contacts the camera 110.

[0075] When removing the camera 110 from the support 16-3, the block 16ha is displaced in a direction away from the support 16gb, and the engagement between the uneven portion 16gd and the uneven portion 16hc is released. As a result, the contact portion 16ga biased by the helical spring 16gc is displaced in a direction away from the camera 110, and the camera 110 can be removed. Therefore, according to the support 16-3, the camera 110 can be removed by only one action of displacing the block 16ha in a direction away from the support 16gb.

[0076] [Embodiment 4] Other embodiments of the present invention will be described below. In embodiment 4, a specific example of the support portion 16 different from the above embodiments will be described.

[0077] Fig. 13 is a plan view showing the configuration of a support part 16-4, which is a fourth specific example of the support part 16. In Fig. 13, reference numeral 1301 is a top view of the support part 16-4, and reference numeral 1302 is a bottom view of the support part 16-4. As shown in Fig. 13, the support part 16-4 differs from the support part 16-3 in that it includes a lock member 16i (push-in part) and a release member 16j instead of the lock member 16g and the release member 16h.

[0078] Locking member 16i, like locking member 16f, presses camera 110 toward retaining member 16e. Release member 16j receives an operation by the user to release camera 110 pressed by locking member 16f.

[0079] In addition, the shape of the side wall 16d of the support portion 16-4 is different from the shape of the side wall 16d of the support portion 16-2 and the support portion 16-3. Specifically, the side wall 16d of the support portion 16-4 does not contact the entire long side of the camera 110, but only a part of it. In other words, there is a gap in a part of the area of ​​the side wall 16d facing the camera 110.

[0080] When removing the camera 110 from the support portion 16-4, the long side of the camera 110 can be pushed through the gap in the side wall 16d to move the camera 110. Therefore, the camera 110 can be removed more easily.

[0081] Fig. 14 is a diagram showing the outline of the configuration of the lock member 16i and the release member 16j. As shown in Fig. 14, the lock member 16i includes a contact portion 16ia, a support 16ib, and a helical spring 16ic. The release member 16j includes a block 16ja and a helical spring 16jb.

[0082] In the lock member 16i, the contact portion 16ia and the helical spring 16ic are the same as the contact portion 16ga and the helical spring 16gc in the lock member 16g, respectively. The support pillar 16ib is different from the support pillar 16gb in that it does not have a portion corresponding to the uneven portion 16gd.

[0083] 14, the support 16ib includes a detachment prevention portion 16ie. The detachment prevention portion 16ie prevents the lock member 16i from detaching from the mounting portion 16a by the biasing force of the helical spring 16ic. In the support portion 16-4, the mounting portion 16a has a stopper (not shown) that engages with the detachment prevention portion 16ie so that the abutment portion 16ia does not detach. In the support portion 16-3 described above, the support 16gb may also include a component equivalent to the detachment prevention portion 16ie.

[0084] In the release member 16j, the helical spring 16jb is the same as the helical spring 16hb in the release member 16h. The block 16ja is different from the block 16ha in that the block 16ja has a friction material 16jd instead of the uneven portion 16hc at the portion where the block 16ja abuts against the support 16ib. The friction material 16jd is a cushion material made of resin. Examples of resin include urethane and rubber.

[0085] In the support portion 16-4, the friction material 16jd is provided on the block 16ja, and therefore durability is improved compared to the block 16ha on which the uneven portion 16hc is formed. Even if the friction material 16jd of the block 16ja in the support portion 16-4 wears out, it is possible to replace only the friction material 16jd.

[0086] In addition, in the support 16-3, the fixing position of the contact portion 16ga is limited to the position where the uneven portion 16gd and the uneven portion 16hc mesh with each other. In contrast, in the support 16-4, the contact portion 16ia is fixed in a state where it is in contact with the camera 110 by the frictional force between the support 16ib and the friction material 16jd. Therefore, the contact portion 16ia can be fixed at any position.

[0087] 13, in the support portion 16-4, the contact portion between the lock member 16i and the release member 16j is exposed only on the lower side of the mounting portion 16a, and not on the upper side. This reduces the possibility that sand or the like will get into the contact portion between the lock member 16i and the release member 16j and adhere to the friction material 16jd, causing a decrease in the frictional force between the friction material 16jd and the support 16ib.

[0088] [Embodiment 5] Other embodiments of the present invention will be described below. In embodiment 5, a specific example of the support portion 16 different from the above embodiments will be described.

[0089] Fig. 15 is a plan view showing the configuration of a support part 16-5, which is a fifth specific example of the support part 16. In Fig. 15, reference numeral 1501 is a top view of the support part 16-5, and reference numeral 1502 is a bottom view. As shown in Fig. 15, the support part 16-5 differs from the support part 16-4 only in that it includes a release member 16k instead of the release member 16j.

[0090] Fig. 16 is a diagram showing an outline of the configuration of the release member 16k. As shown in Fig. 16, the release member 16k includes a block 16ka, a helical spring 16kb, and an operating portion 16ke. The block 16ka is the same as the block 16ja in the release member 16j. The helical spring 16kb is the same as the helical spring 16jb in the release member 16j. The friction material 16kd is the same as the friction material 16jd.

[0091] The operating unit 16ke is a handle disposed on the opposite side of the block 16ka from the friction material 16kd. As shown in Fig. 15, the operating unit 16ke extends to a position where it is visible when the support unit 16-5 is viewed from above. This allows the user to easily remove the camera 110 from the support unit 16-5.

[0092] In Fig. 16, the helical spring 16kb is disposed on the opposite side of the operation portion 16ke to the block 16ka. However, as described above, Fig. 16 is a diagram showing an outline of the configuration of the release member 16k. Therefore, the position of the helical spring 16kb is not limited to the position shown in Fig. 16. The same applies to the release members 16h and 16j described above.

[0093] Fig. 17 is a diagram showing a state in which the user operates the operation unit 16ke in the support unit 16-5. In Fig. 17, reference numeral 1701 is a top view, and reference numeral 1702 is a bottom view. As shown in Fig. 17, when the user performs an operation to displace the operation unit 16ke in a direction away from the mounting unit 16a, the block 16ka moves away from the support 16ib. As a result, the state in which the contact portion 16ia contacts the camera 110 is released.

[0094] [Embodiment 6] Other embodiments of the present invention will be described below. In embodiment 6, a specific example of the support part 16 different from the above embodiments will be described.

[0095] Fig. 18 is a plan view showing the configuration of a support part 16-6, which is a sixth specific example of the support part 16. As shown in Fig. 18, the support part 16-6 differs from the support part 16-2 in that it includes a lock part 16l (push-in part) instead of the lock member 16f.

[0096] Fig. 19 is a side view showing the operation of locking portion 16l. As shown in Fig. 19, locking portion 16l includes a contact portion 16la and a locking portion rotation shaft 16lb. The contact portion 16la is a portion that contacts camera 110. The contact portion 16la has a substantially flat plate shape with a main surface facing camera 110. The contact portion 16la contacts camera 110 in a state in which the main surface is perpendicular to the mounting surface of mounting portion 16a.

[0097] The contact portion 16la rotates around a locking portion rotation shaft 16lb. In the support portion 16-6, the placement portion 16a has an elongated hole 16ab extending in the vertical direction. The locking portion rotation shaft 16lb is inserted into the elongated hole 16ab.

[0098] Reference numerals 1901 and 1902 in Fig. 19 show a state in which the locking portion pivot shaft 16lb is located above the long hole 16ab. When the locking portion pivot shaft 16lb is located above the long hole 16ab, the abutting portion 16la pivots around the locking portion pivot shaft 16lb, so that the main surface of the abutting portion 16la can be switched between a state in which the main surface is parallel to the mounting surface of the mounting portion 16a and a state in which the main surface is perpendicular to the mounting surface.

[0099] Reference numeral 1903 in FIG. 19 illustrates a state in which the locking portion pivot shaft 16lb is located below the long hole 16ab. The locking portion pivot shaft 16lb can be displaced below the long hole 16ab only when the main surface of the abutment portion 16la is perpendicular to the mounting surface of the mounting portion 16a. When the locking portion pivot shaft 16lb is located below the long hole 16ab, the abutment portion 16la cannot pivot around the long hole 16ab. That is, the user can fix the angle of the abutment portion 16la around the locking portion pivot shaft 16lb by displacing the locking portion pivot shaft 16lb below the long hole 16ab. The long hole 16ab may have a shape in which the width decreases from the top to the bottom. The locking portion pivot shaft 16lb may have an elliptical cross section in which the major axis is parallel to the main surface of the abutment portion 16la. In this case, the short axis of the ellipse is less than the width of the bottom end of the long hole 16ab, and the long axis is equal to or greater than the width of the bottom end of the long hole 16ab and less than the width of the top end. The structure of the locking portion 16l is not limited to this, and can be realized in various forms, for example, by providing ribs on the side surface of the locking portion 16l or the long hole 16ab.

[0100] Reference numeral 1904 in Fig. 19 is an enlarged view of the portion of reference numeral 1903 where the contact portion 16la contacts the camera 110. The contact portion 16la has an inclined surface 16lc. The inclined surface 16lc is a surface that is continuous with the upper side of the main surface of the contact portion 16la when the main surface of the contact portion 16la is perpendicular to the mounting surface of the mounting portion 16a. The inclined surface 16lc is inclined so as to form an angle smaller than 180° with the main surface of the contact portion 16la.

[0101] At abutment portion 16la, lock portion rotation shaft 16lb is displaced downward of elongated hole 16ab, so that inclined surface 16lc abuts against camera 110. At this time, camera 110 is pressed toward retainer member 16e by inclined surface 16lc, so that camera 110 is supported by support portion 16-6.

[0102] When supporting the camera 110 by the support portion 16-6, the user places the camera 110 on the mounting portion 16a and rotates the abutment portion 16la around the lock portion rotation shaft 16lb to make the abutment portion 16la perpendicular to the mounting portion 16a. In this state, the user displaces the lock portion rotation shaft 16lb from the upper side to the lower side of the long hole 16ab.

[0103] When removing the camera 110 from the support portion 16-6, the user displaces the lock portion rotation shaft 16lb to the upper side of the long hole 16ab. In this state, the abutment portion 16la is rotated around the lock portion rotation shaft 16lb so that the main surface is horizontal to the mounting portion 16a.

[0104] The support portion 16-6 can be molded integrally with the mounting portion 16a, for example, using a 3D printer. When the support portion 16-6 is molded using a 3D printer, the portion of the long hole 16ab is molded using a removable support material after the entire portion is molded. In this case, it is possible to prevent the lock portion 16l from coming off the mounting portion 16a. However, the manufacturing method of the support portion 16-6 is not limited to the method using a 3D printer.

[0105] [Embodiment 7] Other embodiments of the present invention will be described below. In embodiment 7, a specific example of the handle 17 different from the above embodiments will be described.

[0106] Fig. 20 is a diagram showing the configuration of a handle 17-2, which is a second specific example of the handle 17. As shown in Fig. 20, the handle 17-2 includes a wire 17h and a lever 17i (operating portion) in addition to the configuration of the handle 17-1.

[0107] In the handle 17-2, the wire 17h is connected to a protrusion 17f. In the handle 17-2, the protrusion 17f can be switched between a state in which it protrudes from inside the support 17a and a state in which it does not protrude. The protrusion 17f is biased in a direction in which it protrudes from inside the support 17a by a spring (not shown). The wire 17h can apply tension to the protrusion 17f in a direction in which it does not protrude from inside the support 17a.

[0108] The lever 17i is for a user to operate the locking state of the handle 17-2 with respect to the stopper 17d. The lever 17i is connected to the protrusion 17f via a wire 17h. The lever 17i is located near the grip portion 17b.

[0109] Fig. 21 is a diagram showing the operation of the handle 17-2 by operating the lever 17i. In Fig. 21, reference numeral 2101 indicates a state in which the lever 17i is not operated, and reference numeral 2102 indicates a state in which the lever 17i is operated.

[0110] As shown by the reference numeral 2101, when the lever 17i is not operated, the protrusion 17f protrudes from inside the support 17a. In this state, the protrusion 17f is fitted into one of the openings 17e of the stopper 17d. Therefore, the handle 17-2 is engaged with the stopper 17d.

[0111] As shown by the reference numeral 2102, when the lever 17i is operated, it does not protrude from the inside of the support column 17a. In this state, the handle 17-2 is not engaged with the stopper 17d.

[0112] When changing the angle of the handle 17-2, the user first operates the lever 17i to bring the handle 17-2 into a state where it is not locked to the stopper 17d. Next, the user rotates the handle 17-2 around the first handle rotation shaft 17c to a desired angle. After that, the user releases the operation of the lever 17i to bring the handle 17-2 into a state where it is locked to the stopper 17d. Therefore, in the handle 17-2, the user can change the angle of the handle 17-2 by operating the lever 17i.

[0113] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. [Explanation of symbols]

[0114] 1. Shooting fixture 11 Peripheral surface contact part 11a 1st contact part 11b Second contact part 12 Frame axis 13 Rotating shaft 14 Connecting bar 15 End surface contact part 15a Contact surface 15b Aiming pin 16, 16-1, 16-2, 16-3, 16-4, 16-5, 16-6 Support part 16a Placement section 16aa opening 16b Fixed claw (fitting part) 16bb, 16ea opposite side 16c Deformed claw (push-in part) 16e Retaining member (insertion part) 16f, 16g, 16i Locking parts (push-in parts) 17, 17-1, 17-2 Handle 17c First handle rotation shaft 17d Stopper 17g Bottom end (second handle rotation axis) 17i Lever (operating part)

Claims

1. An imaging tool for imaging a joint between a first pipe and a second pipe to be inserted into a socket of the first pipe, a peripheral surface abutment portion that abuts against an outer peripheral surface of the first pipe; A frame shaft supported by the peripheral surface abutment portion; A connecting bar that rotates around a rotation axis provided on the frame axis; an end surface abutment portion provided at a tip of the connecting bar and having an abutment surface that abuts against an end surface of the receiving port; a support portion that supports a camera so as to capture an image of the joint from a radial direction of the first pipe and is fixed to the frame axis; The contact surface has a tapered shape that is inclined toward the first tube relative to the connecting bar.

2. The photographing jig according to claim 1 , wherein the tapered shape is a shape in which an angle formed between the contact surface and the connecting bar is greater than 90°.

3. The photographing tool according to claim 1 , wherein the end face contact portion further includes an aiming pin extending in a radial direction of the first tube when the end face contact portion is in contact with the end face.

4. the support portion has a mounting portion on which the camera is mounted, The placement portion has an opening portion that opens toward the first tube, The photographing tool according to claim 1 , wherein a wall surface of the opening has a shape that expands from the camera toward the first tube.

5. The support portion is a fitting portion into which the camera is fitted; The photographing tool according to claim 1 , further comprising: a push-in portion that, when the camera is inserted, pushes the camera toward an opposing surface that faces a side surface of the camera.

6. The photographing tool according to claim 5 , wherein a fitting space in the fitting portion into which the camera is fitted becomes smaller along a direction in which the camera is fitted.

7. a handle rotatable about a first handle rotation axis parallel to the axial direction of the first pipe and a second handle rotation axis parallel to the radial direction of the first pipe, so as to move the peripheral surface abutment portion along the axial direction of the first pipe while the peripheral surface abutment portion is in contact with the outer circumferential surface; a stopper that stops the rotation of the handle around the first handle rotation shaft by engaging the handle; The photographing tool according to claim 1 , wherein the handle is switchable between a state where the handle is engaged with the stopper and a state where the handle is not engaged with the stopper by rotating around the second handle rotation shaft.

8. a handle rotatable about a first handle rotation axis parallel to the axial direction of the first pipe to move the peripheral surface abutment portion along the axial direction of the first pipe while the peripheral surface abutment portion is in contact with the outer circumferential surface; a stopper that stops the rotation of the handle around the first handle rotation shaft by engaging the handle; The photographing tool according to claim 1 , wherein the handle includes an operating portion for operating a locking state of the handle relative to the stopper.

9. In a state where the peripheral surface abutment portion abuts against the outer circumferential surface, the peripheral surface abutment portion has a surface perpendicular to the axis of the first tube, a first contact portion that contacts a side surface of the first tube when the diameter of the first tube is less than a predetermined value; and at least two second contact portions that contact a side surface of the first tube when a diameter of the first tube is equal to or greater than a predetermined value, The at least two second abutment portions are located on both sides of the first abutment portion, The first contact portion is formed to be recessed outward in a radial direction of the first pipe relative to the second contact portion, The imaging tool according to claim 1 , wherein the distance between the at least two second contact portions is greater than a minimum anticipated diameter of the first tube.

Images