JP2015094174A - Detection device detecting filling situation of fluid and hollow tube equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detection device which can detect accurately a filling situation of fluid after filling the fluid in a sphere to be filled with the fluid.SOLUTION: A detection device which is installed in a sphere to be filled with fluid and detects the filling situation of the fluid comprises a tubular body and a detection part which is disposed in the tube of the tubular body and detects the filling situation of the fluid, and the inside of the tube is turned to a sealed space through blocking the opening end part of the tubular body by the fluid. The detection device is fitted in the hollow tube to be filled with the fluid. In that case, the opening end part of the tubular body of the detection device faces the hollow part of the hollow tube.

Description

  The present invention relates to a detection device for detecting the state of filling of the fluid in a region where the fluid is filled, and a hollow tube to which the detection device is attached.

  Since concrete has a characteristic of being strong in compressive force and weak in tensile force, it is assumed that the compressive force is applied to the concrete member (prestress) before the load is applied using PC steel, and when the load is received A PC method for preventing the tensile stress from being generated in concrete or controlling the tensile stress is used in many construction works.

  In this PC construction method, a PC sheath pipe is embedded in a concrete structure, a PC steel wire passed through the PC sheath pipe is tensioned, and prestress is introduced into the concrete. Then, in a state in which the PC steel wire is in tension, the PC sheath tube is filled with a grout material and cured to protect the PC steel wire from corrosion.

  Here, when the grout material is filled in the PC sheath tube, air may remain in the PC sheath tube, and a void may be generated in the PC sheath tube. When the PC steel wire is exposed to the residual air in the gap, corrosion occurs due to moisture contained in the residual air from a portion in contact with the residual air in the PC steel wire. Become. As a result, the PC steel wire is deteriorated or broken, and the strength of the concrete structure into which the prestress is introduced is lowered.

  Therefore, it is necessary to detect that the grout material is completely filled in the PC sheath tube. In the PC construction method, a detection device (Patent Document 1) for detecting the filling state of the grout material in the PC sheath tube is used.

JP 2000-230915 A

  In the detection device for detecting the state of filling of the grout material in the PC sheath tube described in Patent Document 1, a pair of electrodes are provided in the branch tube of the PC sheath tube. In this detection device, the electrical resistance value between the electrodes when the electrodes are attached is measured, and then water is injected into the PC sheath tube, and the electrical resistance value between the electrodes in a state where water is injected is measured. Then, a grout material is injected while discharging water from the PC sheath tube, and an electric resistance value between the electrodes in a state where the grout material is injected is measured. By comparing the electrical resistance values between the electrodes obtained by these measurements, it is detected whether or not the grout material is filled in the PC sheath tube.

  In this method, it is necessary to inject water into the PC sheath tube, and even if the water is discharged, moisture remains in the PC steel wire and may corrode. For this reason, in order to prevent corrosion of the PC steel wire, it is necessary to inject a grout material without injecting water into the PC sheath tube and to check the filling state of the grout material in the PC sheath tube.

  For example, referring to FIGS. 22A to 23B, a detection device 78 is provided in the PC sheath tube 76 so that the pair of electrodes are exposed toward the inside of the PC sheath tube 76 (see FIG. 22A). (See FIG. 22A). As shown in FIG. 23B, when the grout material 80 is injected into the PC sheath tube 76, the grout material 80 contacts the pair of electrodes of the detection device 78. As a result, a change occurs in the electrical resistance value between the electrodes, and the detection device 78 detects that the grout material 80 is filled in the PC sheath tube 76.

  However, as shown in FIG. 23A, after the grout material 80 is filled in the PC sheath tube 76, residual air in the PC sheath tube 76 may form a gap 82 in the vicinity of the detector 78. At this time, as shown in FIG. 23B, a part of the highly viscous grout material may remain adhered between the pair of electrodes of the detection device 78. As a result, there is a possibility that the electrical resistance value between the electrodes in the detection device 78 may be maintained as the electrical resistance value detected as being filled with the grout material 80, and the void 82 is formed in the PC sheath tube 76. There is a possibility that the detection device 78 cannot detect this.

  Further, in the case where a branch pipe is provided in the PC sheath pipe 76 as in Patent Document 1 and the detection device 78 is provided in the branch pipe, when the air gap 82 is formed by residual air in the PC sheath pipe 76, A grout film may be formed in the opening on the inner surface side of the PC sheath tube 76 in the branch tube. That is, by forming a film of the grout material at the opening on the inner surface side, the energized state between the electrodes of the detection device 78 is maintained, and the liquid surface of the grout material is positioned at the opening on the inner surface side. If this is the case, there is a possibility that the detection device 78 may make a false detection.

  The present invention has been made in view of the above problems, and provides a detection device capable of accurately detecting the filling state of the fluid after filling the fluid in a region where the fluid is filled. Objective.

  In order to achieve the above object, a detection device according to a first aspect of the present invention is a detection device that is installed in a region where a fluid is filled and detects the filling state of the fluid, and includes a tubular body, A detection unit that is disposed in a cylinder of the cylindrical body and detects a filling state of the fluid, and the cylinder is hermetically sealed by closing an opening end of the cylindrical body by the fluid. It is characterized by being a space.

  According to this aspect, the detection unit is disposed in the cylinder of the cylindrical body. Then, when the fluid is filled in the region filled with the fluid, the opening end portion of the cylindrical body is closed by the fluid, so that the inside of the cylinder becomes a sealed space. When the fluid tries to enter the cylinder, the air in the sealed space is compressed because the cylinder is a sealed space. Since the compressed air prevents the fluid from entering the cylinder, it is possible to prevent the fluid from adhering to the detection portion disposed in the cylinder. As a result, the detection capability of the detection unit is not impaired by the attachment of the fluid. Accordingly, when the gap is formed in the vicinity of the opening end, for example, the detection unit does not detect the fluid, or the detection position of the fluid from a correct filling position is detected. If it leaves | separates in the further away direction, the detection intensity in the said detection part will fall rather than the detection intensity in the said correct filling position. Therefore, an operator engaged in the work of filling the hollow tube with the fluid is that the fluid is not filled in the correct filling position in the vicinity of the opening end, that is, in the vicinity of the opening end. It can be confirmed that voids are formed.

  In addition, the compressed air in the cylinder of the cylindrical body tends to flow into the gap from the inside of the cylinder when the gap is formed, so that a film of the fluid is formed at the opening end. Can be prevented. Therefore, the filling state of the fluid can be accurately detected in the detection unit.

  The detection device according to a second aspect of the present invention is characterized in that, in the first aspect, the distance between the opening end portion of the cylindrical body and the detection portion is not uniform.

  Here, the “distance from the detection unit” indicates the distance from the detection unit arranged in the cylinder in the axial direction of the cylindrical body to an arbitrary point in the circumferential portion of the opening end. .

  Further, here, “the distance is not uniform” means that the distance from the detection unit in the cylinder to an arbitrary position in the circumferential direction of the opening end of the cylindrical body, and the opening end from the detection unit in the cylinder This means that the distance to the other position in the circumferential direction of the part is not the same. That is, in the axial direction of the cylindrical body, the opening end is not parallel to a plane orthogonal to the axial direction of the cylindrical body. Accordingly, the distance between the opening end portion and the detection portion is not uniform. The state where the opening end portion is inclined with respect to the orthogonal surface or the opening end portion is V with respect to the orthogonal surface. The state formed in the shape of a letter, U-shape, etc. is also included.

  According to this aspect, since the opening end portion of the cylindrical body is not uniform in distance from the detection portion, a position where the distance from the detection portion is far from the detection end portion in the opening end portion is generated. Here, since the detection device detects the filling state of the fluid, that is, the liquid level and the like, the axial direction of the detection device is along the direction of gravity, or the fluid does not enter the sealed space. The detection device is installed in a region filled with the fluid in a state inclined to the gravity direction.

  Accordingly, when a gap is formed in the vicinity of the opening end, gravity acts on the fluid attached to the opening end, so that the fluid moves from the close position of the opening end to the far position. And drops on the liquid surface of the fluid, or a part of the fluid is attached to the far position. And the sealed state in the said cylinder is eliminated. Thereby, the said detection part can detect that the said space | gap was formed in the said opening edge part vicinity, ie, the filling condition of the said fluid.

  In addition, when the fluid film is formed at the opening end, gravity acts on the fluid film, so that the film thickness at the close position of the opening end is reduced and the distant position is formed. The film thickness becomes thicker. As a result, the film thickness of the fluid becomes non-uniform and its own weight becomes non-uniform at the opening end, so that the film of the fluid is easily broken at the opening end. As a result, the sealed state in the cylinder is eliminated. Thereby, the said detection part can detect that the said space | gap was formed in the said opening edge part vicinity, ie, the filling condition of the said fluid.

  The detection device according to a third aspect of the present invention is characterized in that, in the second aspect, the opening end portion is inclined with respect to a plane orthogonal to the axial direction of the cylindrical body.

  According to this aspect, since the opening end portion is inclined with respect to a plane orthogonal to the axial direction of the cylindrical body, the fluid attached to the opening end portion moves along the inclined opening end portion. It becomes easy to do. Further, when a gap is formed in the vicinity of the opening end, the fluid moves along the inclined opening end, and the fluid gathers at a position far from the detection unit. It becomes a drop by weight and easily drops on the liquid surface of the fluid. As a result, it is possible to more reliably detect the filling state of the fluid in the detection unit.

  In addition, since the opening end is inclined with respect to a plane orthogonal to the axial direction of the cylindrical body, the thickness of the fluid is not uniform even if the fluid film is formed on the opening end. And the weight of the fluid becomes uneven at the opening end, so that the fluid film is easily broken at the opening end. As a result, the sealed state in the cylinder is eliminated. Thereby, the said detection part can detect that the said space | gap was formed in the said opening edge part vicinity, ie, the filling condition of the said fluid.

The detection device according to a fourth aspect of the present invention is characterized in that, in the second aspect, the opening end is stepped.
According to this aspect, since the opening end is formed in a step shape, it is possible to suppress the formation of the fluid film at the opening end. As a result, since the film of the fluid is difficult to be formed at the opening end, it is possible to more reliably detect the filling state of the fluid in the detection unit.

  In the detection device according to the fifth aspect of the present invention, in any one of the first to fourth aspects, an attachment portion is provided on the cylindrical body.

  Here, the “attachment portion” is formed on the outer surface of the cylindrical body or in the cylinder, for example, for directly attaching the detection device to the hollow tube, or via a branch pipe provided in the hollow tube. Includes for mounting hollow tubes.

  As an example, the detection device may be attached to the PC sheath tube via a branch tube provided in the PC sheath tube. When the opening end in the branch pipe is attached in a state of being retracted from the inner surface of the PC sheath pipe, the fluid level of the fluid is formed in the opening on the inner face side of the PC sheath pipe in the branch pipe, The opening end is not blocked by the fluid.

  Here, the distance between the attachment portion and the opening end of the cylindrical body is set to the distance between the opening on the inner surface side of the PC sheath tube and the opening on the opposite side in the branch tube. Thus, when the detection device is attached to the branch pipe, it can be prevented that the opening end is attached in a state of being retracted into the branch pipe. Therefore, the opening end is closed by the fluid. In this aspect, by attaching the detection device to the branch pipe, the position of the opening end in the branch pipe is set to a position where the opening end is blocked by the fluid. Therefore, the attachment of the detection device can be facilitated.

  The detection device according to any one of the first to fifth aspects is attached to the hollow tube filled with the fluid according to the sixth aspect of the present invention, and the open end is formed on the hollow tube. It faces the hollow part.

  According to this aspect, the detection device is attached to the hollow tube in a direction intersecting with the axial direction of the hollow tube, and the opening end of the cylindrical body of the detection device is connected to the hollow tube. Facing the hollow part. That is, the inside of the cylindrical body communicates with the hollow portion of the hollow tube. Accordingly, when the hollow tube is filled with the fluid, the opening end of the cylindrical body is closed by the fluid, so that the inside of the cylinder becomes a sealed space. Thereby, since the fluid is prevented from entering the cylinder, the fluid can be prevented from adhering to the detection unit. As a result, when a void is formed by residual air in the vicinity of the position where the detection device is provided in the hollow tube, for example, the detection unit does not detect the fluid, or the filling position of the fluid When the distance from the correct filling position is away from the detection unit, the detection intensity at the detection unit is lower than the detection intensity at the correct filling position. Therefore, an operator engaged in the work of filling the hollow tube with the fluid is that the fluid is not filled in the correct filling position in the vicinity of the opening end, that is, in the vicinity of the opening end. It can be confirmed that voids are formed.

  The hollow tube to which the detection device according to the seventh aspect of the present invention is attached, in the sixth aspect, the opening end is inclined with respect to a plane orthogonal to the axial direction of the cylindrical body, and the opening The farthest position from the detection part at the end protrudes from the inner surface of the hollow tube into the hollow part, the closest position from the detection part is located on the same plane as the inner surface of the hollow tube, and at the opening end The direction of inclination is a direction intersecting with the axis of the hollow tube.

  According to this aspect, the position farthest from the detection unit at the opening end projects from the inner surface of the hollow tube to the hollow portion, and the position closest to the detection unit is a step with respect to the inner surface of the hollow tube. The opening end is inclined in a direction intersecting the axis of the hollow tube. Therefore, when the hollow tube is filled with the fluid, the inclined opening end portion of the cylindrical body is closed by the fluid, so that the inside of the cylinder becomes a sealed space. Therefore, the fluid can be prevented from entering the cylinder.

  Furthermore, the inclination direction of the opening end is a direction intersecting the axis of the hollow tube. Here, for example, when the inclined direction of the open end is the axial direction of the hollow tube, that is, in the state where the open end is open toward the direction in which the fluid flows. However, depending on the inclination angle of the hollow tube, the fluid may enter the hollow portion from the opening end.

  According to this aspect, since the inclined direction of the open end is a direction intersecting the axis of the hollow tube, the open end is not open in the direction in which the fluid flows, and the flow When the body flows along the axial direction of the hollow tube, the fluid can be prevented from flowing into the hollow portion.

The hollow tube to which the detection device according to the eighth aspect of the present invention is attached is, in the sixth aspect,
The opening end is stepped, and a position farthest from the detection unit at the opening end projects from the inner surface of the hollow tube to the hollow portion, and a position closest to the detection unit is an inner surface of the hollow tube. The step at the opening end is formed along the axial direction of the hollow tube.

  According to this aspect, since the opening end is formed in a step shape, it is possible to suppress the formation of the fluid film at the opening end. As a result, when a void is formed in the hollow tube, it is difficult to form a film of the fluid at the opening end, so that the detection state of the fluid can be more reliably detected at the detection unit.

The perspective view of the detection apparatus which concerns on a 1st Example. Sectional drawing of the detection apparatus which concerns on a 1st Example. (A) is a sectional side view of the hollow tube in a state where the detection device according to the first embodiment is attached to the hollow tube, and (B) is a diagram illustrating the detection device according to the first embodiment as a hollow tube. Sectional drawing in the direction which cross | intersects the axial direction of the said hollow tube in the state attached to the. (A) is a sectional side view showing a first state when a fluid is filled in the hollow tube to which the detection device according to the first embodiment is attached, and (B) is a diagram of the first embodiment. The sectional side view which shows the 2nd state at the time of filling the hollow body with which the said detection apparatus was attached with the fluid. (A) is a sectional side view showing a third state when a fluid is filled in the hollow tube to which the detection device according to the first embodiment is attached, and (B) is a diagram of the first embodiment. The sectional side view which shows the 4th state at the time of filling a fluid with the said hollow tube which attached the detection apparatus which concerns. (A) shows a state when the hollow tube is filled with a fluid in a state where the detection device according to the first embodiment is attached to the front side of the opening on the inner surface side of the hollow tube in the branch tube. It is a sectional side view, (B) shows the state at the time of filling the said hollow tube with the fluid in the state which attached the detection apparatus which concerns on 1st Example so that it might protrude in the hollow part of a hollow tube. FIG. The perspective view of the detection apparatus which concerns on a 2nd Example. Sectional drawing of the detection apparatus which concerns on a 2nd Example. (A) is a sectional side view of the hollow tube in a state where the detection device according to the second embodiment is attached to the hollow tube, and (B) is a diagram illustrating the detection device according to the second embodiment. Sectional drawing in the direction which cross | intersects the axial direction of the said hollow tube in the state attached to the. (A) is a sectional side view of the hollow tube in a state in which the detection device according to the second embodiment is attached to the hollow tube so that the opening end faces the direction in which the grout material flows, (B) These are sectional side views which show the state at the time of filling a hollow tube with a grout material in the state which attached the detection apparatus as shown to (A). (A) is a sectional side view of the hollow tube when the grout material is filled in the state where the detection device according to the second embodiment is attached to the hollow tube, and (B) is the second embodiment. Sectional drawing in the direction which cross | intersects the axial direction of the said hollow tube at the time of filling the grout material in the state which attached the detection apparatus to the hollow tube. (A) is sectional drawing which shows the state by which the closed space was formed in the detection apparatus when it filled with the grout material in the state which attached the detection apparatus which concerns on 2nd Example to the hollow tube, (B) Sectional drawing which shows the state in which the space | gap was formed in the said hollow tube, after filling a grout material in the state which attached the detection apparatus which concerns on a 2nd Example to the hollow tube. Sectional drawing of the detection apparatus which concerns on the example of a change of a 2nd Example. (A) is a perspective view of the detection apparatus which concerns on a 3rd Example, (B) is sectional drawing of the detection apparatus which concerns on a 3rd Example. Sectional drawing in the direction which cross | intersects the axial direction of the said hollow tube in the state which attached the detection apparatus which concerns on a 3rd Example to the hollow tube. The perspective view of the detection apparatus which concerns on a 4th Example. (A) is a perspective view of the detection apparatus which concerns on a 5th Example, (B) is sectional drawing of the detection apparatus which concerns on a 5th Example. (A) is a sectional side view of the hollow tube in a state where the detection device according to the fifth embodiment is attached to the hollow tube, and (B) is a diagram illustrating the detection device according to the fifth embodiment. Sectional drawing in the direction which cross | intersects the axial direction of the said hollow tube in the state attached to the. (A) is a side sectional view showing a first state when a fluid is filled in the hollow tube to which the detection device according to the fifth embodiment is attached, and (B) is a fifth embodiment. The sectional side view which shows the 2nd state at the time of filling the hollow body with which the said detection apparatus was attached with the fluid. (A) is a sectional side view showing a third state when a fluid is filled in the hollow tube to which the detection device according to the fifth embodiment is attached, and (B) is a fifth embodiment. The sectional side view which shows the 4th state at the time of filling a fluid with the said hollow tube which attached the detection apparatus which concerns. (A) is a sectional side view showing the state of the open end when the sealed state in the hollow part is eliminated in the first embodiment, and (B) is the sealed inside in the hollow part in the second example. The sectional side view in the direction which cross | intersects the axial direction of the said hollow tube which shows the state of the opening edge part when a state is eliminated. (A) is a side sectional view showing a first state when a fluid is filled in a hollow tube to which a detection device in the prior art is attached, and (B) is a view in which a detection device in the prior art is attached. The sectional side view which shows the 2nd state at the time of filling a fluid in an empty pipe. (A) is a sectional side view showing a third state when a fluid is filled in a hollow tube to which a detection device in the prior art is attached, and (B) is an enlarged view of the vicinity of the detection device in the third state. Figure. (A) is a perspective view of the detection apparatus which concerns on a 6th Example, (B) is a perspective view of the hollow tube which concerns on a 6th Example. (A) is a perspective view which shows the state which attached the detection apparatus which concerns on a 6th Example to a hollow tube, (B) in the state which attached the detection apparatus which concerns on a 6th Example to the hollow tube Sectional drawing in the direction which cross | intersects the axial direction of the said hollow tube.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, about the same structure in each Example, the same code | symbol is attached | subjected and it demonstrates only in the first Example, The description of the structure is abbreviate | omitted in a subsequent Example.

<<<< first embodiment >>
A detection apparatus 10 according to the first embodiment will be described with reference to FIGS. 1 and 2. The detection device 10 includes a cylindrical body 12 constituting a device main body and a detection unit 14. The cylindrical body 12 has a hollow portion 16 as “inside the cylinder” formed therein, and one side (the −Z axial direction side in FIG. 1) is opened. Further, the opened portion of the cylindrical body 12 is formed as an open end 18. In this embodiment, the cylindrical body 12 is made of a resin material (vinyl chloride resin, fluororesin, acrylic resin, etc.), but may be made of a metal material or the like. Alternatively, the hollow portion 16 and the opening end portion 18 of the cylindrical body 12 may be coated with a fluororesin or the like to be water repellent.

  The detection unit 14 is disposed in the hollow portion 16. Specifically, the detection unit 14 is attached to the inner surface 20 formed on the side opposite to the one side that is the opening end 18 side (the + Z axial direction side in FIG. 1) in the hollow portion 16. In the present embodiment, the detection unit 14 is configured as an optical proximity object detection sensor. As an example, the detection part 14 is comprised from a pair of optical fiber.

  The detection unit 14 will be specifically described. One optical fiber irradiates light on the −Z-axis direction side in FIG. 1, that is, on the opening end 18 side. If an object exists in the vicinity of the opening end 18 on the optical axis of the light, the light is reflected and enters the other optical fiber. The detection unit 14 can detect the presence of an object in the vicinity of the opening end 18 based on the intensity of reflected light incident on the other optical fiber. Here, the detection unit 14 can set the detection distance by setting the intensity of the reflected light as a threshold value. Note that the detection unit 14 may be a proximity object detection sensor that irradiates an object with laser light and detects the presence of the object by the reflected light, or may be a proximity object detection sensor using ultrasonic waves.

  In the present embodiment, the object detection position of the detection unit 14 is set to the position of the opening end 18 in the Z-axis direction in FIG. Thereby, it is set so that the presence of the object can be detected at the position of the opening end 18 on the extension line in the Z-axis direction of the detection unit 14. In addition, the detection distance of the detection part 14 can be set suitably. In the present embodiment, the detection unit 14 is connected to a display unit (not shown), and is configured to display detection information on the display unit when the presence of the object is detected.

  Further, in the present embodiment, the opening end portion 18 is set to have a uniform distance in the Z-axis direction from the inner surface 20 of the hollow portion 16, that is, the detection portion 14. In the present embodiment, the opening end 18 is orthogonal to the axial direction of the cylindrical body 12 at a position spaced from the detection unit 14 along the axial direction of the cylindrical body 12 as shown in FIGS. 1 and 2. It is configured as a surface.

  The detection of the grout material 32 as the “fluid” of the detection apparatus 10 will be described with reference to FIGS. 3 (A) to 5 (B). 3A to 5B, the detection device 10 is attached to a branch pipe 24 provided in the hollow pipe 22. In this embodiment, the hollow tube 22 is configured as a PC sheath tube, and is embedded in the concrete 26.

  A PC steel wire 28 is disposed in the hollow tube 22 along the axial direction of the hollow tube 22. In addition, in FIG. 3 (A) thru | or FIG. 5 (B), the PC steel wire 28 arrange | positioned in the hollow tube 22 exists in the tension | tensile_strength state. Therefore, in this embodiment, the concrete 26 is in a state where prestress is introduced.

  Further, as shown in FIG. 3A, the detection device 10 is attached to a branch pipe 24 provided in the hollow pipe 22. The opening end 18 of the detection device 10 is located at the opening on the inner peripheral surface 22a side of the hollow tube 22 in the branch tube 24 in the Z-axis direction of FIG. That is, in this embodiment, the open end 18 is attached so that no step is formed on the inner peripheral surface 22 a of the hollow tube 22 from the inner peripheral surface 22 a. The open end 18 faces the hollow portion 30 of the hollow tube 22.

  That is, as shown in FIGS. 3A and 3B, the hollow portion 16 of the cylindrical body 12 is in communication with the hollow portion 30 of the hollow tube 22. The case where the position of the opening end 18 is shifted in the Z-axis direction in the branch pipe 24 will be described later.

  Next, as shown in FIG. 4A, the grout material 32 is caused to flow into the hollow tube 22, and the hollow tube 22 is filled with the grout material 32. When the hollow tube 22 is filled with the grout material 32 as shown in FIG. 4B, the opening end 18 is closed by the grout material 32 in the detection device 10, and the opening end 18 is grouted. A liquid surface 33 is formed by the material 32. As a result, the hollow portion 16 of the cylindrical body 12 is in a sealed state. At this time, the opening end 18 is blocked by the grout material 32, and the liquid surface 33 is formed at the opening end 18, so that the detection unit 14 detects that the grout material 32 is filled at the correct filling position.

  Further, when the grout material 32 is further flowed into the hollow tube 22 in this state, the pressure in the hollow tube 22 increases, and the grout material 32 tends to enter the hollow portion 16 that is in a sealed state. However, the air in the hollow portion 16 is compressed by the grout material 32 that attempts to enter the hollow portion 16 (see FIG. 4B), and the pressure in the hollow portion 16 increases. As a result, the compressed air in the hollow portion 16 presses the liquid level 33 of the grout material 32 that tries to enter the hollow portion 16 from the opening end portion 18, so that the grout material 32 enters the hollow portion 16. To prevent.

  Therefore, since the grout material 32 does not enter the hollow portion 16, it is possible to prevent the grout material 32 from adhering to the detection unit 14. And the detection function of the detection part 14 is maintained.

  Next, when the grout material 32 is filled in the hollow tube 22, air may remain in the hollow tube 22. And these residual air gathers in the hollow tube 22, and forms the space | gap 34. FIG. In FIG. 5A, a gap 34 is formed in the hollow tube 22 in the vicinity of the branch tube 24, that is, in the vicinity of the detection device 10. Further, when the gap 34 is formed, the film 35 of the grout material 32 is likely to be formed at the opening end 18 as shown in FIG. And the air gap 34 try to flow out from the hollow portion 16 into the air gap 34 so that the air pressures of the air gap 34 and the air gap 34 become equal, so that the compressed air repels the grout material 32 adhering to the opening end 18. Therefore, it is difficult to form the film 35 of the grout material 32 at the opening end 18.

  As shown in FIG. 5A, when the gap 34 is formed in the vicinity of the branch pipe 24, the opening end 18 that has been closed by the grout material 32 is reopened, and the hollow portion 16 that has been in a sealed state is It communicates with the gap 34. In this state, the detection unit 14 detects that the grout material 32 is not present at the opening end 18. That is, in the detection unit 14, the grout material 32 is not detected.

  That is, in the display unit where the detection information from the detection unit 14 is displayed, the presence of the grout material 32 is detected by closing the opening end 18 with the grout material 32, and the detection information of the grout material 32 is displayed. However, after that, the opening 34 is reopened due to the formation of the gap 34 and the presence of the grout material 32 cannot be detected, and it is displayed that the grout material 32 has not been detected. Therefore, an operator who is engaged in the work of filling the hollow tube 22 with the grout material 32 can confirm that the void 34 is generated in the hollow tube 22.

  Then, the operator again injects the grout material 32 into the hollow tube 22, and the opening end portion 18 is closed again by the grout material 32 (see FIG. 5B). 14 can detect that the grout material 32 is correctly filled in the hollow tube 22. Thereby, the operator can confirm that the residual air is expelled from the hollow tube 22 in the hollow tube 22 and the hollow tube 22 is filled with the grout material 32. .

  To summarize the above description, when the grout material 32 is filled in the hollow tube 22, the open end 18 of the cylindrical body 12 is closed by the grout material 32, so that the hollow portion 16 becomes a sealed space. And when the grout material 32 tries to enter into the hollow part 16, since the hollow part 16 is a sealed space, the air in the sealed space is compressed. The compressed air prevents the grout material 32 from entering the hollow portion 16, so that the grout material 32 can be prevented from adhering to the detection unit 14 disposed in the hollow portion 16. As a result, the detection capability of the detection unit 14 is not impaired by the adhesion of the grout material 32. Therefore, the detection unit 14 can detect that the grout material 32 is filled in the correct filling position.

  Further, when the air gap 34 is generated in the vicinity of the open end 18 due to the residual air in the hollow tube 22 filled with the grout material 32, for example, the detection unit does not detect the fluid, or the fluid is filled. When the position moves away from the correct filling position in a direction away from the detection unit, the detection intensity at the detection unit is lower than the detection intensity at the correct filling position. Therefore, an operator engaged in the work of filling the hollow tube with the fluid is that the fluid is not filled in the correct filling position in the vicinity of the opening end, that is, in the vicinity of the opening end. It can be confirmed that voids are formed.

  Further, the air compressed in the hollow portion 16 of the cylindrical body 12 can prevent the film 35 of the grout material 32 from being formed on the opening end portion 18. Therefore, the detection unit 14 can accurately detect the filling state of the grout material 32.

  Here, with reference to FIG. 6 (A) and FIG. 6 (B), the attachment position of the detection device 10 to the branch pipe 24 will be described. FIG. 6A shows that in the branch pipe 24, the position of the opening end 18 of the detection device 10 is in the + Z-axis direction from the opening on the inner peripheral surface 22 a side of the hollow pipe 22 in the branch pipe 24. positioned. That is, the position of the opening end 18 is a position deeper in the branch pipe 24 than the opening on the inner peripheral surface 22 a side of the hollow pipe 22 in the branch pipe 24.

  In this state, when the grout material 32 is filled in the hollow tube 22, the liquid surface 33 of the grout material 32 is formed in the opening portion of the branch tube 24 on the inner peripheral surface 22 a side of the hollow tube 22, and the opening end 18. The liquid level 33 is not formed on the surface. Therefore, the opening end 18 is not blocked by the grout material 32, and the liquid surface 33 of the grout material 32 is not formed at the opening end 18, so that the detection unit 14 cannot detect the grout material 32.

  Here, the detection distance of the detection unit 14 in the Z-axis direction in FIG. 6A can be changed by changing the setting of the threshold value of the intensity of the reflected light in the detection unit 14. Specifically, the detection position in the detection unit 14 can be set to the −Z axis direction side in FIG. Thereby, even when the position of the opening end 18 of the detection device 10 is in a position deeper in the branch pipe 24 than the opening on the inner peripheral surface 22a side of the hollow pipe 22 in the branch pipe 24, The detection unit 14 can detect that the liquid surface 33 of the grout material 32 is formed in the opening on the inner peripheral surface 22 a side of the hollow tube 22.

  On the other hand, as shown in FIG. 6B, in the configuration in which the open end 18 protrudes into the hollow portion 30 of the hollow tube 22, the open end 18 is blocked by the grout material 32, and the open end 18 is grouted. Since the liquid level 33 of the material 32 is formed, the detection unit 14 can detect the grout material 32.

  That is, when the detection position of the detection unit 14 is set in the vicinity of the opening end 18 as in the present embodiment, the attachment position of the detection device 10 to the hollow tube 22 is the inner peripheral surface of the hollow tube 22 in the branch tube 24. PC steel in which the opening end 18 is arranged in the hollow tube 22 from the position where the opening on the 22a side, that is, the opening end 18 does not form a step with the inner circumferential surface 22a on the inner circumferential surface 22a of the hollow tube 22. It is within the range up to the position where it protrudes into the hollow portion 30 of the hollow tube 22 to the extent that it does not contact the line 28.

  The detection device 10 is attached to the hollow tube 22 in a direction intersecting the axial direction of the hollow tube 22, and the opening end 18 of the cylindrical body 12 of the detection device 10 is connected to the hollow portion 30 of the hollow tube 22. Facing. Therefore, when the hollow tube 22 is filled with the grout material 32, the open end 18 of the cylindrical body 12 is closed by the grout material 32, so that the hollow portion 16 becomes a sealed space. Thereby, since the grout material 32 is prevented from entering the hollow portion 16, the grout material 32 can be prevented from adhering to the detection unit 14. Therefore, the detection unit 14 can detect that the grout material 32 is filled in the correct filling position.

<<< second embodiment >>>
Next, the detection apparatus 36 according to the second embodiment will be described with reference to FIGS. 7 to 9B. The detection device 36 according to the second embodiment differs from the first embodiment in that the distance from the detection unit 14 at the opening end 38 is not uniform.

  The detection device 36 includes a cylindrical body 40 and a detection unit 14. The cylindrical body 40 has a hollow portion 42 formed therein, and one side (the −Z-axis direction side in FIG. 7) is opened. Further, the opened portion of the cylindrical body 12 is formed as an open end 38. Also in this embodiment, the detection unit 14 is arranged in the hollow portion 42 as in the first embodiment.

  In the present embodiment, the opening end 38 is configured such that the distance from the detection unit 14 is not uniform. Specifically, as shown in FIGS. 7 and 8, a position 38 a far from the detection unit 14 in the axial direction of the cylindrical body 40 and a position 38 b near the distance are formed in the opening end 38. Yes.

  In the present embodiment, the opening end portion 38 is configured as an inclined surface 38c that connects a position 38a that is far from the detection section 14 and a position 38b that is close to the distance. As shown in FIG. 8, the inclination angle of the inclined surface 38c is an angle θ with respect to a virtual surface 39 (X-axis direction in FIG. 8) orthogonal to the axial direction (Z-axis direction in FIG. 8) of the cylindrical body 40. It is configured to be within the range. The angle θ is desirably set in the range of 5 ° to 30 °, but the inclined surface 38c only needs to be inclined with respect to the virtual surface 39.

  Further, by configuring the opening end 38 as the inclined surface 38c, the grout material 32 attached to the opening end 38 is located at the position 38a far from the position 38b near the distance along the inclined surface 38c at the opening end 38. Moving. As a result, since the grout material 32 moves away from the detection unit 14, erroneous detection of the detection unit 14 due to the grout material 32 attached to the opening end 38 can be suppressed. That is, the detection unit 14 can reliably detect that the liquid level 33 of the grout material 32 is formed at the opening end 38.

  9A and 9B show a state in which the detection device 36 is attached to the branch tube 24 of the hollow tube 22. In the present embodiment, a position 38 b at a distance from the detection unit 14 in the opening end 38 is attached to the opening on the inner peripheral surface 22 a side of the hollow tube 22 in the branch tube 24. Further, a position 38 a at a distance from the detection unit 14 at the opening end 38 protrudes toward the hollow portion 30 of the hollow tube 22. The detection device 36 is preferably attached to the hollow tube 22 such that the position 38 a far from the open end 38 protrudes most into the hollow portion 30 of the hollow tube 22.

  Further, in the present embodiment, the inclination direction of the inclined surface 38c is set in the X-axis direction. That is, the inclination direction of the inclined surface 38c is set so as to intersect the axial direction of the hollow tube 22 (Y-axis direction in FIG. 9B).

  Here, for example, as shown in FIGS. 10 (A) and 10 (B), the detection device 36 is arranged so that the inclined surface 38c extends in the axial direction of the hollow tube 22 (X-axis direction in FIG. 10 (A)). The state attached to the branch pipe 24 will be described.

  When the grout material 32 is injected into the hollow tube 22 as shown in FIG. 10A, the grout material 32 moves from the + X axis direction side in FIG. 10A to the −X axis direction side. That is, the grout material flows toward the −X axis direction. In the detection device 36 attached to the branch pipe 24, the inclined surface 38c of the opening end 38 faces the + X axis direction side. That is, the opening end 38 opens to the + X axis direction side.

  As a result, when the grout material 32 continues to be injected into the hollow tube 22, the flow direction of the grout material 32 and the opening direction of the opening end 38 face each other, so that the grout as shown in FIG. Part of the material 32 enters the hollow portion 42 beyond the open end 38. However, in the detection device 36, the open end 38 is closed by the grout material 32, and there is no escape route for air in the hollow portion 42, so that the hollow portion 42 is sealed and the air is compressed in the hollow portion 42. .

  The air compressed in the hollow portion 42 hinders the inflow of the grout material 32 in the + Z-axis direction from the position 38 b where the distance from the detection portion 14 at the opening end portion 38 is closer in the axial direction of the detection device 36. As a result, the liquid level 33 of the grout material 32 is formed at a position 38b where the distance from the detection unit 14 is short in the Z-axis direction. At this time, the opening end portion 38 is blocked by the grout material 32, and the liquid surface 33 is formed at the opening end portion 38. Therefore, the detection unit 14 detects that the grout material 32 is filled at the correct filling position. The detection unit 14 detects that the open end 38 is in a state of being blocked by the grout material 32. Further, in this state, the compressed air in the hollow portion 42 presses the liquid surface 33, so that the liquid surface 33 formed at the position 38b close to the detection portion 14 in the Z-axis direction is displaced in the + Z-axis direction. Disturb.

  On the other hand, as shown in FIGS. 11A and 11B, the opening end 38 flows in the direction in which the grout material 32 flows, that is, the axial direction of the hollow tube 22 (X-axis direction in FIG. 11A). If the grouting material 32 is injected into the hollow tube 22, the possibility that the grouting material 32 enters the hollow portion 42 from the opening end 38 can be suppressed. As a result, since the possibility that the grout material 32 adheres to the detection unit 14 can be reduced, the detection function of the detection unit 14 can be maintained.

  Next, as shown in FIG. 12 (A), the opening end 38 intersects the axial direction of the hollow tube 22 (X-axis direction in FIG. 12 (A)) (Y-axis direction in FIG. 12 (A)). When the hollow tube 22 is filled with the grout material 32 in a state where the detection device 36 is attached to the branch pipe 24 so as to open toward the surface, the opening end portion 38 is blocked by the grout material 32, and the inclined surface A liquid surface 33 of the grout material 32 is formed along 38c.

  Thereby, the hollow part 42 becomes a sealed space, and the air compressed in the hollow part 42 presses the liquid surface 33, thereby reducing the grout material 32 from entering the hollow part 42. In this state, the detection unit 14 detects that the grout material 32 has been filled up to the opening end 38.

  Next, as shown in FIG. 12B, when the air gap 34 is formed in the vicinity of the detection device 36 by the residual air in the hollow tube 22, the liquid level 33 of the grout material 32 is separated from the opening end 38. . As a result, the sealed state of the hollow portion 42 is eliminated.

  Further, when the gap 34 is formed, the film 35 of the grout material 32 is likely to be formed at the opening end 38 as shown in FIG. 21 (B), but the compressed air in the hollow portion 42 is contained in the hollow portion 42. And the air gap 34 try to flow out from the hollow portion 42 to the air gap 34 so that the air pressures of the air gap 34 and the air gap 34 become equal, so that the compressed air repels the grout material 32 adhering to the opening end portion 38. Therefore, it is difficult to form the film 35 of the grout material 32 at the opening end 38.

  Further, even if the film 35 of the grout material 32 (see FIG. 21B) is formed on the opening end 38, gravity acts on the film 35 of the grout material 32, and the grout material 32 is far from the opening end 38. Since the films gather at the position 38a, the film thickness at the position 38b near the opening end 38 is thin, and the film thickness at the far position 38a is thick. As a result, the thickness of the film 35 of the grout material 32 becomes non-uniform, and its own weight becomes non-uniform at the opening end 38, so that the film 35 of the grout 32 is easily broken at the opening end 38. As a result, the sealed state in the hollow portion 42 is eliminated.

  Further, when the gap 34 is formed, a part of the grout material 32 may remain as a droplet 32 a on the inclined surface 38 c of the opening end 38. At this time, since gravity acts on the droplet 32a in the axial direction of the detection device 36, that is, in the direction of gravity (the −Z axis direction in FIG. 12B), the detection unit at the opening end 38 along the inclined surface 38c. 14 moves from a position 38b near the distance 14 to a position 38a far away, and accumulates at a position 38a far away. Then, when the accumulated droplets 32a become a certain amount or more at the far position 38a, they drop onto the liquid surface 33 of the grout material 32.

  Here, the droplet 32a of the grout material 32 moves from the position 38b near the distance from the detection unit 14 at the opening end 38 to the position 38a far from the detection unit 14, and thus moves away from the detection unit 14. That is, the droplet 32a of the grout material 32 moves in a direction in which the detection sensitivity in the detection unit 14 becomes weak.

  Therefore, by setting the detection sensitivity of the grout material 32 in the detection unit 14 so that it is not detected at the position 38a where the distance is long, even if the droplet 32a is attached to the opening end 38, the distance of the droplet 32a of the grout material 32. Is not detected by the movement to the far position 38a. Accordingly, since the grout material 32 at the position 38a far from the opening end 38 is not detected by the detection unit 14, an operator engaged in the work of filling the grout material 32 into the hollow tube 22 can be It can be confirmed that voids 34 are generated in the surface.

  Then, the operator again injects the grout material 32 into the hollow tube 22, and the open end portion 38 is again closed by the grout material 32 (see FIG. 12A). 14 can detect that the grout material 32 is correctly filled in the hollow tube 22. Thereby, the operator can confirm that the residual air is expelled from the hollow tube 22 in the hollow tube 22 and the hollow tube 22 is filled with the grout material 32. .

  In the present embodiment, the inclination direction of the inclined surface 38c is preferably a direction that intersects the axial direction of the hollow tube 22, but when the grout material 32 flows into the hollow portion 42 as described with reference to FIG. Since the sealed state is formed in the hollow portion 42, the inclined direction may be a direction along the axial direction of the hollow tube 22.

  To summarize the above description, in the second embodiment, the opening end 38 of the cylindrical body 40 is not evenly spaced from the detection unit 14, so that the opening end 38 is far away from the detection unit 14. A position 38b close to 38a occurs. Here, since the detection device 36 detects the filling state of the grout material 32, that is, the liquid level 33, the axial direction of the detection device 36 is along the direction of gravity, or the grout material 32 does not enter the hollow portion 42. The detector 36 is installed in the hollow tube 22 filled with the grout material 32 in a state tilted to the extent of the gravity.

  Therefore, when the gap 34 is formed in the vicinity of the opening end 38, gravity acts on the grout material 32 adhering to the opening end 38, so that it moves from a position 38b near the opening end 38 to a position 38a far away. Then, the liquid drops on the liquid surface 33 of the grout material 32, or a part of the grout material 32 is attached to the distant position 38a. And the sealing state in the hollow part 42 is eliminated. Thereby, the detection part 14 can detect that the space | gap 34 was formed in the opening edge part 38, ie, the filling condition of the grout material 32. FIG.

  Further, in this embodiment, when the gap 34 is formed, the compressed air in the hollow portion 42 tends to flow into the gap 34, so that the film 35 of the grout material 32 is hardly formed on the opening end 38, or the opening Even if the grout film 35 is formed at the end 38, the thickness of the film 35 becomes non-uniform and easily lost, so that the sealed state in the hollow portion 42 is eliminated. As a result, the detection unit 14 can detect the formation of the gap 34 in the vicinity of the opening end 38, that is, the filling state of the grout material 32.

  Further, the opening end 38 is inclined with respect to a virtual surface 39 orthogonal to the axial direction of the cylindrical body 40, that is, an inclined surface 38 c is formed with respect to the virtual surface 39 orthogonal to the opening end 38. It becomes easy for the grout material 32 adhering to 38 to move along the inclined surface 38c. Further, when the gap 34 is formed in the vicinity of the opening end 38, the grout material 32 moves along the inclined surface 38 c, and the grout material 32 gathers at a position 38 a far from the detection unit 14. It becomes the drop 32a by weight, and it becomes easy to drop on the liquid level 33 of the grout material 32. As a result, it is possible to more reliably detect the filling state of the grout material 32 in the detection unit 14.

  In the second embodiment, the position 38 a farthest from the detection unit 14 at the opening end 38 protrudes from the inner peripheral surface 22 a as the “inner surface” of the hollow tube 22 to the hollow portion 30, and is the closest position from the detection unit 14. 38 b is located in the opening of the branch pipe 24 on the inner peripheral surface 22 a side of the hollow tube 22, and the opening end 38 is inclined in a direction intersecting the axis of the hollow tube 22. Accordingly, when the hollow tube 22 is filled with the grout material 32, the inclined opening end portion 38 of the cylindrical body 40 is closed by the grout material 32, so that the hollow portion 42 becomes a sealed space. As a result, the grout material 32 can be prevented from entering the hollow portion 42.

  Furthermore, the inclination direction of the open end 38 is a direction intersecting the axis of the hollow tube 22. Here, for example, when the inclined direction of the open end 38 is the axial direction of the hollow tube 22, that is, in the state where the open end 38 is open toward the direction in which the grout material 32 flows, the hollow tube 22. However, depending on the inclination angle of the hollow tube 22, the grout material 32 may enter the hollow portion 42 from the open end 38.

  In the second embodiment, since the inclined direction of the opening end 38 is a direction intersecting the axis of the hollow tube 22, the opening end 38 is not open toward the direction in which the grout material 32 flows, and the grout When the material 32 flows along the axial direction of the hollow tube 22, it is possible to prevent the grout material 32 from flowing into the hollow portion 42.

<<< Modified Example of Second Embodiment >>>
A modification of the second embodiment will be described with reference to FIG. The modification of the second embodiment differs from the detection device 36 of the second embodiment in that the configuration of the detection unit is different. Other configurations are the same as those of the second embodiment.

  The detection device 44 includes a cylindrical body 40 and a detection unit 46. In this embodiment, the detection unit 46 is configured as a pair of electrodes 46a and 46b instead of an optical proximity sensor. Specifically, the detection unit 46 is disposed in the hollow portion 42. One electrode 46 a extends to the side of the position 38 a farthest from the inner surface 48 in the hollow portion 42 at the open end 38. The other electrode 46b extends at the open end 38 to the position 38b closest to the inner surface 48 in the hollow portion 42.

  When the grout material level 33 (see FIG. 12A) is formed at the open end 38, the one electrode 46a and the other electrode 46b are electrically connected via the grout material 32. As a result, the detection unit 46 can detect that the grout material 32 blocks the opening end portion 38 and the hollow portion 42 is in a sealed state.

  Further, when the liquid level of the liquid surface 33 of the grout material 32 is lowered (see FIG. 12B), the open end 38 is opened. At this time, even if the grout material 32 adheres to each of the one electrode 46a and the other electrode 46b, the distance between the two electrodes is long, so it is not electrically connected, and the detection state of the grout material 32 Must not. Therefore, also in this embodiment, the operator can confirm that the gap 34 is formed in the hollow tube 22.

<<< Third embodiment >>>
The third embodiment differs from the first embodiment in that an attachment portion 50 is provided. Other configurations are the same as those of the first embodiment.

  As shown in FIG. 14A, the detection device 52 includes a cylindrical body 54 constituting the device main body and the detection unit 14. The cylindrical body 54 has a hollow portion 56 formed therein, and one side (the −Z axial direction side in FIG. 14A) is opened. Further, the opened portion of the cylindrical body 54 is formed as an open end 58. Further, an attachment portion 50 is formed on the outer peripheral surface 54a of the cylindrical body 54 on the side opposite to the opening end portion 58 (the + Z axis direction side in FIG. 14A). The detection unit 14 is disposed in the hollow portion 56.

  As shown in FIG. 14B, the distance between the attachment portion 50 and the open end 58 in the Z-axis direction is set to L1. Here, as shown in FIG. 15, in the portion where the branch tube 24 of the hollow tube 22 is provided, the opening portion on the inner peripheral surface 22a side of the branch tube 24, and the opening portion located on the opposite side to the inner peripheral surface 22a Is set to L1. That is, the distance between the attachment portion 50 and the opening end 58 in the detection device 52 is the same as the distance between the opening portion on the inner peripheral surface 22a side of the branch pipe 24 and the opening portion located on the opposite side to the inner peripheral surface 22a. Set to distance.

  Therefore, as shown in FIG. 15, when attaching the detection device 52 to the branch pipe 24, the attachment portion 50 is attached to the opening portion located on the opposite side of the inner peripheral surface 22 a in the branch pipe 24. It is possible to prevent the step 58 from forming a step with respect to the inner peripheral surface 22 a of the hollow tube 22. That is, when the hollow tube 22 is filled with the grout material 32, the detection device 52 can be easily attached to the branch tube 24 so that the open end portion 58 is blocked by the grout material 32 and the hollow portion 56 is sealed. Can be attached to.

  In summary, in the present embodiment, the cylindrical body 54 is provided with an attachment portion 50. When the opening end 58 is attached in the branch pipe 24 in a state of being retracted from the inner peripheral surface 22 a of the hollow tube 22, the grout material 32 is formed in the opening on the inner peripheral surface 22 a side of the hollow tube 22 in the branch pipe 24. The liquid surface 33 may be formed, and the opening end 58 may be blocked by the grout material 32.

In the present embodiment, the distance L1 between the mounting portion 50 and the opening end 58 of the cylindrical body 54 is set such that the opening on the inner peripheral surface 22a side of the hollow tube 22 and the opening on the opposite side of the branch tube 24 By setting the distance L1 therebetween, when the detection device 52 is attached to the branch pipe 24, the opening end portion 58 can be positioned on the same plane so as not to cause a step difference from the inner peripheral surface 22a of the hollow pipe 22. it can. Therefore, by attaching the detection device 52 to the branch pipe 24, the position of the opening end 58 in the branch pipe 24 is blocked by the grout material 32 when the grout material 32 is filled in the hollow tube 22. Since it can set to the position which peels, the attachment to the hollow tube 22 of the detection apparatus 52 can be made easy.

<<<< Modification of the third embodiment >>>>
(1) In the present embodiment, the distance L1 between the attachment portion 50 and the opening end 58 of the cylindrical body 54 is set so that the opening on the inner peripheral surface 22a side of the hollow tube 22 and the opening on the opposite side in the branch tube 24. However, instead of this configuration, depending on the setting of the detection distance of the detection unit 14 in the detection device 52, the distance between the attachment unit 50 and the opening end 58 of the cylindrical body 54 is set. The distance L1 may be changed as appropriate.
(2) In the present embodiment, the attachment portion 50 is configured so that the detection device 52 can be attached to the hollow tube 22 via the branch tube 24, but instead of this configuration, the detection device 52 is directly connected to the hollow tube 22. You may comprise the attaching part 50 so that it may attach to.

<<< Fourth embodiment >>>
A detection apparatus 60 according to the fourth embodiment will be described with reference to FIG. The detection device 60 includes a cylindrical body 62 constituting the device main body and the detection unit 14. The cylindrical body 62 has a hollow portion 64 formed therein, and one side (the −Z axial direction side in FIG. 16) is opened. Further, the opened portion of the cylindrical body 62 is formed as an open end portion 66.

  Positions 66a and 66b that are far from the detection unit 14 and positions 66c and 66d that are close to each other are formed in the opening end 66. In the present embodiment, along the circumferential direction of the opening end portion 66, a position 66a with a long distance, a position 66c with a short distance, a position 66b with a long distance, and a position 66d with a short distance are alternately arranged. In this embodiment, when the opening end portion 66 is viewed from the side in a direction connecting the position 66c having a short distance and the position 66d having a close distance, the opening 66 is formed in an inverted V shape.

  That is, the opening end 66 includes an inclined surface 66e extending from the positions 66c and 66d having a short distance to the position 66a far from the distance, and an inclined surface 66f extending from the positions 66c and 66d having a short distance to a position 66b far from the distance. .

  Therefore, also in this embodiment, as in the second embodiment, when the opening end portion 66 is closed by the grout material 32 and then the gap 34 is formed in the vicinity of the opening end portion 66, the inclined surfaces 66e and 66f are formed. Even if the grout material 32 is adhered, the grout material 32 can be moved along the inclined surfaces 66e and 66f from the positions 66c and 66d having a short distance to the positions 66a and 66b having a long distance. Therefore, in the present embodiment, the grout material 32 can be reliably moved away from the detector 14 along the inclined surfaces 66e and 66f.

<<<< Modification Example of Fourth Embodiment >>>>
In this embodiment, the position 66a far from the detection unit 14 and the position 66b far from the detection unit 14 are set to have the same distance from the detection unit 14, but either distance is set longer than this configuration. Or you may set short. Similarly, the position 66c close to the distance and the position 66d close to the distance may be set so that either of the distances is set longer or shorter.

<<< Fifth embodiment >>>
Next, a detection apparatus 68 according to a fifth embodiment will be described with reference to FIGS. 17 (A) to 20 (B). The detection device 68 according to the fifth embodiment is different from the first embodiment in that the opening end portion 70 is formed in a step shape.

  The detection device 68 includes a cylindrical body 72 and a detection unit 14. The cylindrical body 72 has a hollow portion 74 formed therein, and one side (the −Z axial direction side in FIG. 17B) is opened. Further, the opened portion of the cylindrical body 72 is formed as an open end portion 70. Also in this embodiment, the detection unit 14 is arranged in the hollow portion 74 as in the first embodiment.

  In this embodiment, the opening end portion 70 is formed in a step shape having a plurality of steps in the Z-axis direction. Specifically, as shown in FIGS. 17A and 17B, the opening end 70 is a position that is close to the position 70 a far from the detection unit 14 in the axial direction of the cylindrical body 72. 70b is formed, and a stepped portion 70c is provided between a position 70a having a long distance and a position 70b having a short distance.

  18A and 18B show a state in which the detection device 68 is attached to the branch tube 24 of the hollow tube 22. In the present embodiment, the position 70 b at which the distance from the detection unit 14 in the opening end 70 is short is attached to the opening on the inner peripheral surface 22 a side of the hollow tube 22 in the branch tube 24. Further, the position 70 a far from the detection unit 14 at the opening end 38 projects toward the hollow portion 30 of the hollow tube 22.

  Further, in a state where the detection device 68 is attached to the branch pipe 24 of the hollow tube 22, the stepped portion 70 c of the stepped opening end 70 is in the axial direction of the hollow tube 22 (X-axis direction in FIG. 18A). ). Therefore, at least a part of the opening portion of the opening end 70 opens along the axial direction of the hollow tube 22 (see FIG. 18B).

  Next, as shown in FIG. 19A, the grout material 32 is caused to flow into the hollow tube 22, and the hollow tube 22 is filled with the grout material 32. When the hollow tube 22 is filled with the grout material 32 as shown in FIG. 19B, the grout material starts from a part of the opening end portion 70 that is open along the axial direction of the hollow tube 22. A part of 32 enters the hollow portion 74 beyond the open end portion 70. However, in the detection device 68, the open end 70 is blocked by the grout material 32, and there is no escape route for air in the hollow portion 74, so that the hollow portion 74 is sealed and the air is compressed in the hollow portion 74. .

  The air compressed in the hollow portion 74 hinders the inflow of the grout material 32 in the + Z-axis direction from the position 70 b where the distance from the detection portion 14 at the opening end portion 70 is closer in the axial direction of the detection device 68. As a result, the liquid level 33 of the grout material 32 is formed at a position 70b where the distance from the detection unit 14 is short in the Z-axis direction. At this time, since the opening end portion 70 is closed by the grout material 32, the detection unit 14 can detect that the grout material 32 is correctly filled in the hollow tube 22. Further, in this state, the compressed air in the hollow portion 74 presses the liquid surface 33, so that the liquid surface 33 formed at the position 70b near the distance from the detection unit 14 in the Z-axis direction is displaced in the + Z-axis direction. Disturb.

  Next, as shown in FIG. 20, the air gap 34 is formed by the air remaining in the hollow tube 22. In FIG. 20A, a gap 34 is formed in the hollow tube 22 in the vicinity of the branch tube 24, that is, in the vicinity of the detection device 68. Further, in the present embodiment, the opening end portion 70 is formed in a step shape. Even if the film 35 of the grout material 32 is formed so as to cover the opening end portion 70, the film 35 becomes non-uniform, so that the film 35 is easily broken. Therefore, the film 35 of the grout material 32 is difficult to be formed at the opening end portion 70.

  Further, when the gap 34 is formed, a part of the grout material 32 adhering to the opening end portion 70 is a position 70a far from the position 70b near the distance from the detection unit 14 at the opening end portion 70 due to the action of gravity. Move to. Accordingly, the grout material 32 moves from the position 70 b near the distance from the detection unit 14 in the opening end 38 to the position 70 a far from the detection unit 14, and thus moves away from the detection unit 14. That is, the grout material 32 moves in a direction in which the detection sensitivity in the detection unit 14 becomes weak.

  That is, the grout material 32 becomes difficult to be detected by the detection unit 14 or is not detected. Accordingly, since the grout material 32 at the position 70a far from the opening end 70 is not detected by the detection unit 14, an operator engaged in the work of filling the grout material 32 in the hollow tube 22 can be It can be confirmed that voids 34 are generated in the surface.

  Then, the worker again injects the grout material 32 into the hollow tube 22. As a result, the liquid level 33 is formed at a position 70b near the distance from the detection unit 14 in the Z-axis direction at the opening end 70, and the opening end 70 is blocked by the grout material 32 (see FIG. 20B). ) Therefore, the detection unit 14 can detect the grout material 32 again. Thereby, the operator can confirm that the residual air is expelled from the hollow tube 22 in the hollow tube 22 and the hollow tube 22 is filled with the grout material 32. .

  That is, according to the present embodiment, since the opening end portion 70 is formed in a stepped shape, the formation of the film 35 of the grout material 32 at the opening end portion 70 can be suppressed. As a result, since the film 35 of the grout material 32 is hardly formed on the opening end portion 70, the filling state of the grout material 32 can be detected more reliably in the detection unit 14.

<<< Sixth embodiment >>>
Next, with reference to FIGS. 24A to 25B, a detection apparatus according to a sixth embodiment will be described. The detection apparatus according to the sixth embodiment is different from the fifth embodiment in that the cylindrical body 72 is provided with an attachment portion 84 that covers a part of the outer peripheral surface of the hollow tube 22.

  Referring to FIG. 24A, the detection device 86 includes a cylindrical body 72, the detection unit 14, and an attachment unit 84. The configurations of the cylindrical body 72 and the detection unit 14 are the same as those in the fifth embodiment. The attachment portion 84 is provided on the cylindrical body 72 and is configured to be curved along the outer peripheral surface of the hollow tube 22.

  As shown in FIG. 24B, the hollow tube 22 in this embodiment is provided with an opening 88. The diameter of the opening 88 is defined corresponding to the diameter of the outer peripheral surface of the cylindrical body 72 of the detection device 86. That is, the opening 88 is configured so that the cylindrical body 72 of the detection device 86 is attached.

  As shown in FIG. 25A, when the detection device 86 is attached to the hollow tube 22, the attachment portion 84 covers a part of the outer peripheral surface of the hollow tube 22 and is in close contact with the outer peripheral surface (FIG. 25). (See (A)). Further, the opening end portion 70 of the cylindrical body 72 is in a state of protruding through the opening 88 and projecting into the hollow portion 30 of the hollow tube 22 when the detection device 86 is attached to the hollow tube 22 (FIG. 25 ( B)). That is, the attachment state of the detection device 86 to the hollow tube 22 in the sixth embodiment is the same as the state in which the detection device 68 of the fifth embodiment is attached to the hollow tube 22. Therefore, the description when the grout material 32 is filled in the hollow tube 22 is the same as that of the fifth embodiment, and the description is omitted.

  In this embodiment, the opening end portion 70 of the detection device 86 is formed in the same step shape as in the fifth embodiment, but instead of this configuration, the opening end portion 70 is replaced with the first embodiment. May be formed in a flat shape (see FIGS. 1 and 2), an inclined shape in the second embodiment (see FIGS. 7 and 8), or a V shape in the fourth embodiment (see FIG. 16). .

<<<< Modification Example in Each Example >>>>
(1) In each of the embodiments, the cylindrical bodies 12, 40, 54, 62, and 72 are configured as cylinders. However, instead of this configuration, the cylindrical bodies may be configured as rectangular cylinders, or configured as polygonal cylindrical bodies. May be.
(2) In each embodiment, the detection devices 10, 36, 44, 52, 60 and 68 are configured to be attached to the branch pipe 24 of the hollow tube 22, but may be configured to be directly attached to the hollow tube 22.
(3) In this embodiment, the detection devices 10, 36, 44, 52, 60, and 68 are configured as detection devices that detect the filling state of the grout material 32 in the hollow tube 22. For example, when forming a concrete floor It may also be configured as a sensor that detects the filling state of the concrete with the liquid level of the concrete surface.

To summarize the above description, the detection devices 10, 36, 44, 52, 60, 68, 86 in this embodiment are installed in the hollow tube 22 filled with the grout material 32, and detection is performed to detect the filling state of the grout material 32. Constructed as a device, arranged in the hollow bodies 16, 42, 56, 64, 74 of the cylindrical bodies 12, 40, 54, 62, 72 and the cylindrical bodies 12, 40, 54, 62, 72, and grout material And detecting units 14 and 46 for detecting 32 filling states. Since the open end portions 18, 38, 58, 66, and 70 of the cylindrical bodies 12, 40, 54, 62, and 72 are closed by the grout material 32, the hollow portions 16, 42, 56, 64, and 74 are sealed spaces. It becomes.
A detection device characterized by that.

  The opening ends 38, 66, and 70 of the cylindrical bodies 40, 62, and 72 are not uniformly spaced from the detection units 14 and 46. The open end 38 is inclined with respect to a virtual surface 39 orthogonal to the axial direction of the cylindrical body 40. Alternatively, the open end 70 is stepped. A mounting portion 50 is provided on the cylindrical body 54.

  Detection devices 10, 36, 44, 52, 60, 68, 86 are attached to the hollow tube 22 filled with the grout material 32 in a direction intersecting with the axial direction of the hollow tube 22. The open ends 18, 38, 58, 66, 70 face the hollow part 30 of the hollow tube 22.

  In the hollow tube 22 to which the detection device 36 is attached, the open end 38 of the detection device 36 is inclined with respect to a virtual plane 39 orthogonal to the axial direction of the cylindrical body 40. A position 38 a farthest from the detection unit 14 at the opening end 38 protrudes from the inner peripheral surface 22 a of the hollow tube 22 to the hollow portion 30, and a position 38 b closest to the detection unit 14 is the same as the inner peripheral surface 22 a of the hollow tube 22. The direction of inclination at the open end 38 is a direction that intersects the axis of the hollow tube 22.

  In the hollow tube 22 to which the detection devices 68 and 86 are attached, the opening end portion 70 has a stepped shape, and the position 70a farthest from the detection portion 14 in the opening end portion 70 is hollow from the inner peripheral surface 22a of the hollow tube 22. A position 70 b that protrudes into the portion 30 and is closest to the detection unit 14 is located on the same plane as the inner peripheral surface 22 a of the hollow tube 22, and a stepped portion 70 c at the open end 70 is formed along the axial direction of the hollow tube 22. Has been.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say.

10, 36, 44, 52, 60, 68, 86 Detector, 12, 40, 54, 62, 72 Cylindrical body, 14, 46 Detector, 16, 42, 56, 64, 74 Hollow part,
18, 38, 58, 66, 70 Open end, 20 inner surface, 22 hollow tube, 22a inner peripheral surface,
24 branch pipe, 26 concrete, 28 PC steel wire, 30 hollow part,
32, 80 grout material, 32a droplet, 33 liquid level, 34, 82 void,
38a, 66a, 66b, 70a Distanced distance, 38b, 66c, 66d, 70b Distanced distance, 38c, 66e, 66f Inclined surface, 39 Virtual surface, 46a, 46b Electrode, 48 Inner surface, 50, 84 Mounting part, 54a outer peripheral surface, 70c stepped portion, 76 hollow sheath tube, 78 detector, 88 opening, L1 distance, θ angle

Claims (8)

A detection device that is installed in a region to be filled with a fluid and detects a filling state of the fluid,
A tubular body;
A detection unit that is arranged in a cylinder of the cylindrical body and detects a filling state of the fluid;
With
When the opening end of the cylindrical body is closed by the fluid, the inside of the cylinder becomes a sealed space.
A detection device characterized by that. The detection device according to claim 1, wherein the opening end portion of the cylindrical body is not uniform in distance from the detection portion.
A detection device characterized by that. The detection device according to claim 2, wherein the opening end portion is inclined with respect to a plane orthogonal to the axial direction of the cylindrical body.
A detection device characterized by that. The detection device according to claim 2, wherein the opening end is stepped.
A detection device characterized by that. In the detection device according to any one of claims 1 to 4,
The cylindrical body is provided with a mounting portion,
A detection device characterized by that. A hollow tube filled with a fluid,
The detection device according to any one of claims 1 to 5 is attached to the hollow tube,
The open end faces the hollow portion of the hollow tube;
A hollow tube having a detection device attached thereto. In the hollow tube to which the detection device according to claim 6 is attached,
The open end is inclined with respect to a plane orthogonal to the axial direction of the cylindrical body,
The position farthest from the detection unit at the opening end protrudes from the inner surface of the hollow tube into the hollow part, and the closest position from the detection unit is located on the same plane as the inner surface of the hollow tube,
The direction of inclination at the open end is a direction intersecting the axis of the hollow tube.
A hollow tube having a detection device attached thereto. In the hollow tube to which the detection device according to claim 6 is attached,
The open end is stepped,
The position farthest from the detection unit at the opening end protrudes from the inner surface of the hollow tube into the hollow part, and the closest position from the detection unit is located on the same plane as the inner surface of the hollow tube,
The step at the opening end is formed along the axial direction of the hollow tube.
A hollow tube having a detection device attached thereto.

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