JP5241797B2 - Tool holding jig inside the steel pipe - Google Patents

Description

  The present invention relates to a holding jig for a tool inside a steel pipe, and is particularly useful when applied to a case where an internal investigation tool for a steel pipe tower is held at the axial center position in the steel pipe.

  Some transmission line towers have steel pipes formed as structural materials. In recent steel pipe towers, it has become clear that corrosion has occurred on the inner peripheral surface of the steel pipe tower. Since corrosion of the inner peripheral surface of the steel pipe tower is likely to have a serious impact on the tower strength, it is necessary to take measures to prevent corrosion. When taking such anti-corrosion measures, it is important to understand the mechanism of this type of corrosion. As part of this, it is necessary to investigate the environment inside the steel pipe tower, that is, to continuously measure the temperature, humidity, etc. inside the steel tower steel pipe over a long period (for example, one year) and accumulate the data.

  FIG. 5 is an explanatory view conceptually showing an example of a transmission line tower using a steel pipe as a structural material. As shown in the figure, the transmission line tower I is configured by connecting a plurality of types (eight types are shown) of steel pipes 01A to 01H having an inner diameter (for example, about 100 mm to 600 mm). Each of the steel pipes 01A to 01H is connected so that the inner diameter gradually increases from the tip toward the ground. Therefore, the connection parts 02A-02G of several places (seven places in a figure) of the different diameter steel pipe for connecting each steel pipe 01A-01H are formed. In addition, an inclination change point (a connecting portion 02C in the drawing) in which the inclination angle of the steel pipes 01A to 01H with respect to the ground is changed is formed in the middle. In FIG. 5B, the connecting portion 02B and the connecting portion 02C that is also the inclination change point are extracted and enlarged.

  When conducting an environmental investigation in the steel pipes 01A to 01H in the transmission line tower I, as shown in FIG. 5C, in the steel pipe 01A at the tip of the transmission line tower I, a lid ( (Not shown), the rope 04 is inserted into the steel pipe 01A from the opening 03, and the weight of the weight 05 connected to the tip of the rope 04 is used to lower the steel pipes 01B to 01H. It is conceivable that a plurality of measuring instruments 06A and 06B are arranged at predetermined intervals. Here, the measuring instruments 06A and 06B have a function of accumulating data such as temperature and humidity in a predetermined period.

  However, when the measuring instruments 06A and 06B are directly fixed to the rope 04 in this way, the rope 04 is lowered or installed in the steel pipes 01A to 01H along with the installation work of the measuring instruments 06A and 06B into the steel pipes 01A to 01H. When the rope 04 ascends during the take-out operation, there may be a case where the measuring instruments 06A and 06B collide with the inner peripheral surfaces of the steel pipes 01A to 01H due to the swing of the rope 04. Since the measuring instruments 06A and 06B are generally precision machines, it is necessary to avoid an impact caused by a collision or the like as much as possible. Moreover, it is desirable that the measuring instruments 06A and 06B be installed at the central portion in the axial direction of the steel pipes 01A to 01H. This is because the center portion best reflects the state of the environment (temperature, humidity, etc.) in the steel pipes 01A to 01H. Therefore, a holding jig for holding the measuring instruments 06A and 06B in a predetermined position is required.

  A holding jig as shown in FIG. 6 has been proposed as this kind of holding jig. As shown in the figure, the holding jig 07 includes a rod-shaped main body 07A, a guide 07B, and an opening / closing part 07C. The main body 07A is fixed to a rope 04 to which 06A and 06B are fixed. The guide 07B is two rod-like members of the same length formed so as to protrude from the main body 07A to the left and right from the main body 07A toward the inner peripheral surface of the steel pipe 01B. It comes to contact. Thus, the main body 07A, the rope 04 whose position is regulated by the main body 07A, and the measuring instruments 06A and 06B can be positioned at the center in the axial direction of the steel pipes 01A and 01B.

  Here, the opening / closing part 07C is interposed between the main body 07A and the guide 07B, and has a function of opening and closing the guide 07B with respect to the main body 07A. Such an opening / closing part 07C is suitably formed by interposing a spring that applies a force in a direction in which the guide 07B always opens, or by opening / closing it with an operating mechanism such as hydraulic pressure (see, for example, Patent Document 1). can do. FIG. 6B shows the state where the guide 07B is closed in the holding jig 07, and FIG. 6C shows the opened state.

JP 2004-286114 A (see FIG. 3 and paragraphs [0039] to [0041])

  When the opening / closing part 07C of the holding jig 07 according to the related art as described above is configured to be opened by a spring, there is a concern that trouble may occur when the measuring instruments 06A and 06B using the rope 04 are moved up and down. In the case of the transmission line tower I, since the inner diameters of the steel pipes 01A to 01H change stepwise, it is necessary to flexibly expand according to each inner diameter. In the case of a spring, the connecting portion 02A is inserted when the measuring instruments 06A and 06B are inserted and removed. This is because smooth passage in the connecting portions 02A to 02D may be hindered, such as being caught by a step portion formed on ~ 02D. As described above, when the opening / closing part 07C is formed of a spring, the guide 07B always rubs against the inner peripheral surfaces of the steel pipes 01A to 01H, so that the inner peripheral surface is not only damaged but also easily caught. In particular, in the connecting part 02A of the steel pipes 01A and 01B having different diameters, the steel pipes 01A and 01B are easily caught by the level difference of the connecting part 02A.

  On the other hand, when the guide 07B is opened or closed by hydraulic pressure or electricity, the operation mechanism of the opening / closing portion 07C is complicated and easily broken, and a separate power source is required. For this reason, when installing for a long time, an operation | movement part adheres by rust etc., The guide 07B cannot be folded at the time of removal, and removal may become impossible.

  In view of the above-mentioned problems of the prior art, the present invention does not require a special driving means such as a power source, and reliably places an instrument such as a measuring instrument suspended on a rope with a simple configuration at the central portion in the axial direction of the steel pipe. It is an object of the present invention to provide a holding jig for a tool in a steel pipe that can be positioned and can be well installed and removed through the rope of the tool.

According to a first aspect of the present invention, there are a main body to which a lifting rope is connected and suspended by the rope, and a plurality of parts that are orthogonal to the axial direction of the rope and are equally spaced around the rope axis. And a plurality of guide members made of flexible members each projecting radially from the main body in the same direction and each base end being attached to the outer peripheral surface of the main body, and the main body is a rod-shaped member The same number of grooves as the guide members are formed on the outer peripheral surface at equal intervals in the circumferential direction and extending in the axial direction of the rope, and both end portions of the guide members are fitted into the grooves. And a holding jig for the appliance inside the steel pipe, wherein the jig is an arcuate member formed so as to be movable in the axial direction along the groove .

According to a second aspect of the present invention, in the holding jig for an instrument inside the steel pipe described in the first aspect, the main body is positioned at one of the both ends fitted into the groove at a position between the other end. The steel pipe has a stopper that is fixed and that restricts the positions of the both ends by bringing the one and the other into contact with each other as the guide members move along the grooves. In the tool holding jig.

According to a third aspect of the present invention, there is provided a holding jig for an instrument inside a steel pipe according to the first or second aspect , wherein a bearing is disposed at a tip portion of each guide member. In the tool holding jig.

According to a fourth aspect of the present invention, in the holding jig for an instrument inside a steel pipe according to any one of the first to third aspects , both end portions of the guide members are formed in the grooves through bearings. It is in the holding jig of the instrument in the steel pipe characterized by being inserted.

  According to the present invention, each of the plurality of guide members can be appropriately bent, so that even if the diameter of the steel pipe changes, the distal end portion of each guide member can be flexibly followed by the inner peripheral surface of the steel pipe. It can be made to contact. Here, since the distance between the tip of the guide member and the main body is formed at an equal distance, an instrument such as a measuring instrument fixed to the rope defined at the position of the main body is always attached to the central portion in the axial direction of the steel pipe. Can be located.

  At this time, since the holding at the predetermined position uses the elastic force of the guide member, a special drive source or the like is not required, and structural simplification can be achieved as much as possible.

It is a figure which shows the holding jig of the instrument in the inside of the steel pipe which concerns on embodiment of this invention, (a) is a top view, (b) is a perspective view. It is a perspective view which shows the modification of a part of holding jig | tool shown in FIG. It is explanatory drawing which shows the aspect at the time of installation of the measuring device using the holding jig shown in FIG. It is explanatory drawing which shows the aspect at the time of removal of the measuring device using the holding jig shown in FIG. It is a figure regarding a steel pipe tower, (a) is explanatory drawing which shows the whole steel pipe tower, (b) is a perspective view which extracts and shows a part of (a), (c) is a steel pipe of a steel pipe tower through a rope via a rope It is sectional drawing which shows the aspect in the case of installing a measuring device. It is a figure which shows the holding jig of the instrument inside the steel pipe which concerns on a prior art, (a) is sectional drawing which shows the mode at the time of the installation, (b) is explanatory drawing which shows the state which closed the guide, (c) is a guide It is explanatory drawing which shows the state which opened.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1A and 1B are views showing a holding jig according to an embodiment of the present invention, in which FIG. 1A is a plan view thereof and FIG. 1B is a perspective view thereof. As shown in both drawings, the holding jig 1 includes a main body 2 and a plurality (four in this embodiment) of guide members 3A, 3B, 3C, 3D. The main body 2 is a cylindrical member suspended by a lifting rope 04 (not shown in FIG. 1; the same shall apply hereinafter), and its outer peripheral surface is axially spaced at equal intervals around its axis. The same number of grooves 4A, 4B, 4C and 4D as the guide members 3A to 3D are formed. The guide members 3A to 3D are formed of a flexible linear material such as resin or metal, and both end portions thereof are fitted into the grooves 4A to 4D so as to be movable in the axial direction along the grooves 4A to 4D. Is formed. Thus, the guide members 3 </ b> A to 3 </ b> D are formed as arcuate members whose shapes change according to the force acting on the tip, and as clearly shown in FIG. 1 (a), the axial direction of the main body 2. The same amount is projected radially in a plurality of directions (four directions in this embodiment) orthogonal to (the axial direction of the rope 04).

  Here, although not shown, it is desirable that both end portions of the guide members 3A, 3B, 3C, and 3D are fitted into the grooves 4A to 4D through slide members such as bearings. This is because the guide members 3A to 3D can smoothly move along the grooves 4A to 4D. Furthermore, as shown in FIG. 2, it is desirable to dispose a bearing 6 also at the tip of each guide member 3A to 3D. Friction between the inner peripheral surface and the front end portions of the guide members 3A to 3D when the respective front end portions contact the inner peripheral surface of the steel pipe via the bearing 6 (this will be described in detail later). This is because the smooth movement of the holding jig 1 relative to the inner peripheral surface can be ensured by reducing as much as possible.

  As shown in FIG. 1B, the stopper 5 is fixed to the main body 2 at the center in the axial direction. Thus, the stopper 5 is fixed to the main body 2 at a position between one and the other of the respective end portions of the respective guide members 3A to 3D fitted in the respective grooves 4A to 4D. With the movement along the grooves 4A to 4D at both ends, the one and the other are brought into contact with each other to regulate the positions of the both ends. That is, in the state shown in FIG. 1B, one of the end portions cannot move downward in the figure beyond the stopper 5, and the other cannot move upward in the figure beyond the stopper 5. .

  FIG. 3 is an explanatory view showing an aspect at the time of installation of the measuring instrument using the holding jig according to the present embodiment, and FIG. 4 is an explanatory view showing an aspect at the time of removal. The usage mode of the holding jig 1 according to the present embodiment will be described with reference to both drawings. Such a usage mode is a case where a measuring instrument for measuring the environment (temperature, humidity, etc.) inside the steel pipe constituting the transmission line tower I as shown in FIG. 5 is installed or removed.

  As shown in FIG. 3, at the time of installation of the measuring instrument 06, the transmission line tower I (FIG. 5 (FIG. 5 (FIG. 5 (C))) is attached with the weight 04 (see FIG. 5 (c)) tied to the rope 04 to which the measuring instrument 06 is fixed. Inserted by its own weight into the inside of the steel pipes 7, 8, 10 and 11 from the top opening of a). Here, the steel pipes 7, 8, 10, and 11 are members constituting the power transmission line tower I, and are different diameter steel pipes to be measured that are connected by the connecting portions 9 and 12, respectively.

  At this time, in the steel pipe 8 having a relatively large diameter as shown in FIG. 3 (a), the guide members 3A and 3B (note that the guide members 3C and 3D are also provided in directions orthogonal thereto, respectively, The same applies to the following, and the tip ends are brought into contact with the inner peripheral surface of the steel pipe 8. Similarly, in the steel pipe 11 having a relatively large diameter as shown in FIG. 3B, each of the guide members 3A and 3B is deformed into a flat elliptical shape in a horizontal direction in a direction orthogonal to the axial direction. The tip is brought into contact with the inner peripheral surface of the steel pipe 11.

  Here, since the guide members 3A and 3B are deformed symmetrically with respect to the main body 2 and have the same amount of protrusion from the main body 2, the main body 2 is positioned at the center in the axial direction of the steel pipes 8 and 11. Further, since the guide members 3A and 3B are flexible members, the inner peripheral surfaces of the steel pipes 8 and 11 are pressed by a predetermined reaction force accompanying deformation, so that a predetermined center position can be stably secured. As a result, the position of the measuring instrument 06 can be stably occupied at the predetermined axial center position via the position of the rope 04, and predetermined environmental data can be stably collected over a long period of time. Further, since the position of the rope 04 is regulated by the holding jig 1 according to the present embodiment at the time of installation, the rope 04 is shaken and the measuring instrument 06 collides with the inner peripheral surface of the steel pipes 7, 8, 10, 11 and is damaged. Such inconveniences can be prevented in advance.

  FIG. 4 is an explanatory view showing an aspect when the measuring instrument using the holding jig according to this embodiment is removed. This figure shows a mode in which a connecting portion 9 between a relatively large diameter steel pipe 8 and a relatively small diameter steel pipe 7 is passed. First, when the guide members 3A and 3B reach the position shown in FIG. 4A by pulling up the rope 04, the guide member 3A is deformed into an ellipse and the tip is in contact with the inner peripheral surface of the steel pipe 8. , 3B is caught by the stepped portion of the connecting portion 9. If tension is continuously applied to the rope 04 and pulled up in such a state, the guide members 3A and 3B are deformed as shown in FIG.

  When the rope 04 is further pulled up in such a state, the guide members 3A and 3B are deformed into a shape corresponding to the inner diameter of the steel pipe 7 as shown in FIG. Even in such removal work, the axial position of the measuring instrument 06 is continuously held at a predetermined position by the holding jig 1 via the rope 04, so that the collision with the inner peripheral surfaces of the steel pipes 8 and 7 can be prevented.

  As described above, according to the present embodiment, the holding at the predetermined position uses the elastic force of the guide member, so that a special drive source such as a power source is not required.

  In the above embodiment, the guide members 3A to 3D are arc-shaped members, but the present invention is not limited to this. In principle, any flexible member that protrudes from the main body 2 at a right angle to the axial direction may be used. Moreover, in the said embodiment, although the number of guide members 3A-3D was four, it is not restricted to this. The larger the number, the more stable the holding function as a holding jig, but it is sufficient that there are at least two, preferably three or more.

  Furthermore, in the said embodiment, although the measuring instrument 06 was demonstrated as an instrument, it is not restricted to this. In addition, it is useful as a positioning / holding jig for instruments such as cameras and coating devices that are inserted into steel pipes to perform predetermined operations.

  The present invention can be used in the industrial field where maintenance and management of steel pipe towers and construction are performed.

DESCRIPTION OF SYMBOLS 1 Holding jig 2 Main body 3A-3D Guide member 4A-4D Groove 5 Stopper 6 Bearing 7,8 Steel pipe 9 Connection part 04 Rope 06 Measuring instrument

Claims (4)

A main body to which a rope for raising and lowering is connected and suspended from the rope;
Each base end portion is attached to the outer peripheral surface of the main body by projecting radially from the main body in a plurality of directions that are orthogonal to the axial direction of the rope and at equal intervals around the rope axis. And having a plurality of guide members made of flexible members ,
The main body is a rod-shaped member, and the same number of grooves as the guide member are formed on the outer circumferential surface thereof at equal intervals in the circumferential direction and extending in the axial direction of the rope.
An instrument holding jig inside a steel pipe, wherein both ends of each guide member are arc-shaped members that are fitted in the groove and are formed so as to be movable in the axial direction along the groove . In the holding jig of the instrument inside the steel pipe according to claim 1 ,
The one and the other are fixed to the main body at a position between one and the other of the both ends fitted into the groove, and the movement of the guide members along the grooves at the both ends. A holding jig for an appliance inside a steel pipe, characterized by having stoppers for restricting the positions of the both end portions by bringing them into contact with each other. In the holding jig of the instrument inside the steel pipe according to claim 1 or claim 2 ,
A holding jig for an instrument inside a steel pipe, wherein a bearing is disposed at the tip of each guide member. In the holding jig of the instrument inside the steel pipe according to any one of claims 1 to 3 ,
The holding jig of the instrument in the steel pipe characterized by the fact that both ends of each guide member are fitted into the grooves through bearings.

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