JP2019210994A - Tool, tube with tool, method for using tool and method of transporting tube - Google Patents

Abstract

To accurately deform a tube.SOLUTION: A tool 10 is disposed in a tube 50, the tool 10 having an expansion/contraction part 12 that expands and contracts in first direction Z, and a pair of contact parts 15 that are disposed on both sides in second direction X crossing the first direction Z, with respect to the expansion/contraction part 12, and fixed to the expansion/contraction part 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a jig, a pipe with a jig, a method for using the jig, and a method for transporting the pipe.

  Conventionally, for example, when a pipe is transported, it may be desired to deform the pipe using a jig (see Patent Document 1 below). This jig suppresses the tube from being flattened by its own weight, and maintains a perfect circle of the tube.

Japanese Utility Model Publication No.59-172894

  The jig has room for improvement in accurately deforming the tube.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to accurately deform a pipe.

In order to solve the above problems, the present invention proposes the following means.
The jig according to the present invention is a jig disposed in a pipe, and is disposed on both sides of a stretchable portion that expands and contracts in a first direction and a second direction that intersects the first direction with respect to the stretchable portion. And a pair of contact portions fixed to the expansion / contraction portion.

  A jig is disposed in the tube in a state where the pair of contact portions are not in contact with each other. Thereafter, the expansion / contraction part is extended in the first direction in a state where both ends of the expansion / contraction part abut against the inner peripheral surface of the pipe. Thereby, the tube can be contracted in the second direction while extending in the first direction. As a result, the pair of abutting portions abuts on the inner peripheral surface of the pipe. For example, at this time, by stopping the extension of the expansion / contraction part, the deformation amount of the tube can be stabilized with reference to the distance in the second direction between the pair of contact parts. Thereby, a pipe | tube can be deform | transformed accurately.

  You may provide the moving mechanism which moves the said expansion-contraction part and said pair of contact part.

  The moving mechanism moves the expansion / contraction part and the pair of contact parts. Therefore, for example, a jig disposed in the tube from the end of the tube can be easily moved to the center of the tube. Thereby, workability etc. can be improved.

  The contact portion may be movable in the second direction with respect to the extendable portion.

  The abutting portion is movable in the second direction with respect to the extendable portion. Therefore, it is possible to adjust the distance in the second direction between the pair of abutting portions that serves as a reference for the deformation amount of the tube. Thereby, the pipe can be accurately deformed to various deformation amounts.

  The contact portion may include a wheel.

  The pipe | tube with a jig | tool which concerns on this invention is equipped with the pipe | tube and the said jig | tool, The both ends of the said expansion-contraction part and the said pair of contact part are contact | abutted to the internal peripheral surface of the said pipe | tube.

  The method of using the jig according to the present invention is a method of using the jig, the step of arranging the jig in a state where the pair of contact portions are not in contact with each other in the tube, and the telescopic portion The both ends of the tube are abutted against the inner peripheral surface of the tube, and the stretchable portion is expanded in the first direction, so that the tube is contracted in the second direction while extending in the first direction, And a step of bringing a pair of abutting portions into contact with the inner peripheral surface of the tube.

  In the method for transporting a pipe according to the present invention, a pipe in which a jig having an expansion / contraction part is disposed is transported by a vehicle in a state where the pipe is flattened in the vertical direction by extending the expansion / contraction part.

  According to the present invention, the tube can be deformed with high accuracy.

It is a front view of the jig (tube, pipe with a jig) concerning one embodiment of the present invention. It is the II-II arrow sectional view shown in Drawing 1, and is the figure which looked at the expansion-contraction part side. It is a front view of the jig | tool shown in FIG. 1, Comprising: It is a figure which shows the state which contracted the expansion-contraction part. It is the IV-IV arrow directional cross-sectional view shown in FIG. 3, Comprising: It is the figure which looked at the expansion-contraction part side. It is a front view of the transport vehicle which transports the pipe | tube shown in FIG. It is a figure explaining the transportation method of the pipe | tube shown in FIG. 1, Comprising: It is a figure which shows the state which loaded the pipe | tube on the transport vehicle.

Hereinafter, a jig according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6.
The jig 10 is disposed in the tube 50. The jig 10 is used when the pipe 50 is transported from a factory to a construction site, for example. Examples of the pipe 50 include a reinforced plastic pipe (FRP pipe), a reinforced plastic composite pipe (FRPM pipe), a steel pipe, a cast iron pipe, and a PVC pipe. In the present embodiment, the tube 50 is a reinforced plastic composite tube including an outer surface protective layer, an outer surface FRP layer, a resin mortar layer, an inner surface FRP layer, and an inner surface protective layer in order from the surface.

The pipe 50 is, for example, a circular pipe (for example, φ2400 or more), and is arranged in a state extending in the horizontal direction. Hereinafter, the horizontal direction in a front view when the tube 50 is viewed along the tube axis direction is referred to as a width direction W1 of the tube 50.
The jig 10 forcibly extends the pipe 50 in the vertical direction Z. As a result, the tube 50 contracts in the width direction W1. In other words, the jig 10 is arranged so that the tube 50 is formed in the tube 50 so that the tube 50 has a vertically flat shape (in the illustrated example, an elliptical shape long in the vertical direction Z) that is large in the vertical direction Z and small in the width direction W1. Force deformation from.

  When the jig 10 forcibly deforms the tube 50, the tube 50 becomes smaller in the width direction W1. Thereby, for example, the pipe 50 can be transported even on a narrow road where the pipe 50 before deformation cannot be transported. In addition to the case where the pipe 50 cannot physically pass through the road, there are cases where the pipe 50 cannot legally pass through in the country to which the present application belongs. For example, in Japan, various dimensions such as the width of a vehicle (transport vehicle 60) are defined as general limit values by the Road Law Vehicle Restriction Order. Therefore, before transporting the pipe 50, the transport vehicle 60 that is a general vehicle or the transport vehicle 60 that is a special vehicle is selected depending on the size of the pipe 50 in the width direction W1, for example.

  When the jig 10 is used for transportation as described above, and the tube 50 has a receiving port, the jig 10 is preferably provided in the receiving port or in the tube 50 near the receiving port. That is, since the receiving port is the widest in the pipe 50, for example, it is easy to realize transportation on a narrow road by reducing (narrowing) the width direction W1 of the wide receiving port. it can. If the width direction W1 of the receiving port is narrowed so as to be loaded on the transport vehicle 60 having a width of 2.5 m or less, it is not necessary to arrange a special vehicle, and the burden of permission application and transport cost can be reduced. Moreover, since the axis | shaft (tube axis | shaft) of the pipe | tube 50 can be loaded toward the front-back direction of a vehicle (transport vehicle 60), the long pipe | tube 50 can be carried and a transport efficiency improves by extension.

  As shown in FIGS. 1 to 4, the jig 10 includes a jig main body 11, a telescopic part 12, a regulation mechanism 13, a moving mechanism 14, and a pair of contact parts 15. In the description of the jig 10, the direction that becomes the tube axis direction when the jig 10 is arranged in the tube 50 is referred to as the front-rear direction Y, and the direction that is the width direction W 1 is referred to as the left-right direction X. The direction that becomes the direction is called the circumferential direction. The left-right direction X intersects (orthogonally) both the up-down direction Z and the front-rear direction Y.

As shown in FIG. 2, the jig body 11 includes a pair of front and rear base frames 16 and a connection frame 17 that connects the pair of front and rear base frames 16.
As shown in FIG. 1, the base frame 16 is formed in a hollow regular hexagonal shape when viewed from the front when viewed from the front-rear direction Y. As shown in FIG. 2, a first through hole 18 is formed in each portion of the base frame 16 located on both upper and lower sides.

  A plurality (six in the illustrated example) of the connection frames 17 are provided at intervals in the circumferential direction. The connecting frame 17 connects the corners (six corners in the illustrated example) of the pair of front and rear base frames 16 in the front-rear direction Y. The jig body 11 may be provided with a level not shown.

The expansion / contraction part 12 expands and contracts in the vertical direction Z (first direction). The stretchable part 12 penetrates the jig body 11 in the vertical direction Z. The expansion / contraction part 12 extends and contracts in the vertical direction Z while maintaining a state longer than the jig body 11 in the vertical direction Z.
As shown in FIG. 2, the stretchable portion 12 includes a stretchable body 19 that stretches in the vertical direction Z, a pair of upper and lower holding members 20 provided at both ends in the vertical direction Z of the stretchable body 19, and each holding member 20. A pair of upper and lower abutting members 21 held and an adjusting mechanism 22 for adjusting the amount of expansion / contraction of the expansion / contraction body 19 are provided.

The elastic body 19 includes a pair of front and rear extension units 23 and connecting members 24 a and 24 b that connect the pair of front and rear extension units 23.
Each telescopic unit 23 penetrates the base frame 16 in the vertical direction Z. Each expansion / contraction unit 23 protrudes from the inside of the base frame 16 to the outside (outside in the vertical direction Z) through the first through hole 18.

Each telescopic unit 23 includes a first member 25 and a second member 26.
The first member 25 is formed in a cylindrical shape extending in the vertical direction Z. The first member 25 is formed with a second through hole 27 that penetrates in the front-rear direction Y.
The second member 26 is disposed in the first member 25 so as to be movable in the vertical direction Z. The second member 26 protrudes upward (vertical direction Z) from the first member 25. The expansion / contraction amount of the stretchable body 19 changes according to the protrusion amount of the second member 26 with respect to the first member 25.

  The connecting members 24 a and 24 b include a first connecting member 24 a that connects the pair of front and rear first members 25, and a second connecting member 24 b that connects the pair of front and rear second members 26. The first connecting member 24a connects the upper ends of the first member 25 to each other. The second connecting member 24b is positioned below the first connecting member 24a and connects the lower ends of the second member 26 to each other. The second connecting member 24b passes through the second through hole 27 in the front-rear direction Y.

  The holding member 20 is formed of a channel material extending in the front-rear direction Y. End portions in the vertical direction Z of the expansion / contraction unit 23 are connected to both front and rear end portions of the holding member 20. As shown in FIG. 1, the holding member 20 is formed in a U-shape (upright U-shape or inverted U-shape) that opens in the up-down direction Z when viewed from the front-rear direction Y.

  The abutting member 21 is attached (fitted) to each holding member 20. As shown in FIG. 2, the abutting member 21 is formed in a rectangular parallelepiped shape that is long in the front-rear direction Y. The abutting member 21 is longer in the front-rear direction Y than the holding member 20. The abutting material 21 is made of, for example, wood (square material). The hardness of the abutting member 21 is lower than the hardness of the stretchable body 19.

  The adjusting mechanism 22 connects the first connecting member 24a and the second connecting member 24b in the vertical direction Z. In the illustrated example, the adjustment mechanism 22 is formed of a so-called lever block (registered trademark). The adjustment mechanism 22 includes a winding part 28, a chain 29, and an operation lever 30. The chain 29 is wound around the winding portion 28. The operation lever 30 adjusts the winding amount of the chain 29 around the winding portion 28.

  As shown in FIG. 2, the adjustment mechanism 22 ensures a short distance in the vertical direction Z between the first connecting member 24a and the second connecting member 24b when the amount of winding of the chain 29 relative to the winding portion 28 is large. The distance in the vertical direction Z between the connecting members 24a and 24b is kept short. As a result, the second member 26 is greatly protruded from the first member 25, and the telescopic body 19 is extended.

  As shown in FIG. 4, the adjustment mechanism 22 has the first connecting member 24 a and the second connecting member when the amount of winding of the chain 29 around the winding portion 28 is small (when the chain 29 is unwound long). The distance in the up-down direction Z with respect to 24b is allowed to be long, and the distance in the up-down direction Z between the connecting members 24a, 24b is ensured long. As a result, the amount of protrusion of the second member 26 from the first member 25 is suppressed, and the expandable body 19 is contracted.

  As shown in FIGS. 1 to 4, the regulating mechanism 13 regulates the amount of expansion / contraction of the expansion / contraction part 12. The restriction mechanism 13 is provided in the telescopic part 12. The restriction mechanism 13 includes an extension restriction part 31 and a shrinkage restriction part 32. The extension restricting portion 31 restricts further extension of the extendable portion 12 when the extendable portion 12 is in the most extended state. The shrinkage restricting portion 32 restricts further shrinkage of the stretchable portion 12 when the stretchable portion 12 is in the most contracted state.

  As shown in FIGS. 1 and 2, a pair of extension restricting portions 31 are arranged at intervals in the vertical direction Z. Both extension restricting portions 31 are disposed inside the base frame 16. Both extension restricting portions 31 are engaged with the inner peripheral surface of the base frame 16 in a state where the stretchable portion 12 is most extended. Of the two extension restricting parts 31, the extension restricting part 31 located on the upper side is locked to a part located on the upper side of the base frame 16. The extension restriction part 31 positioned on the lower side of the both extension restriction parts 31 is locked to the lower part of the base frame 16. In addition, the expansion-contraction part 12 contact | abuts to the internal peripheral surface of the pipe | tube 50 in the state extended most.

  As shown in FIG. 3 and FIG. 4, a pair of the shrinkage restricting portions 32 are arranged at intervals in the vertical direction Z. Both contraction restricting portions 32 are disposed outside the base frame 16. Both shrinkage restricting portions 32 are engaged with the outer peripheral surface of the base frame 16 in a state where the stretchable portion 12 is most contracted. Of the two shrinkage restriction parts 32, the shrinkage restriction part 32 positioned on the upper side is locked to a part of the base frame 16 positioned on the upper side. The shrinkage restricting portion 32 located on the lower side of the both shrinkage restricting portions 32 is engaged with the portion located on the lower side of the base frame 16. The stretchable part 12 is separated from the inner peripheral surface of the pipe 50 in the most contracted state.

As shown in FIG. 1, the pair of contact portions 15 are disposed on both sides in the left-right direction X (second direction) with respect to the stretchable portion 12. Each contact portion 15 is movable in the left-right direction X with respect to the stretchable portion 12.
Each contact portion 15 is fixed to the extendable portion 12 via the jig body 11. The pair of abutting portions 15 are disposed in the central portion of the jig main body 11 in the vertical direction Z. The pair of contact portions 15 are arranged on the same straight line extending in the left-right direction X.

  The contact part 15 is formed of a so-called caster. The contact portion 15 includes a bracket 33 that is fixed to the frame, and a first wheel 34 that is rotatably fixed to the bracket 33. A long hole 35 extending in the left-right direction X is formed in the bracket 33. The long hole 35 penetrates the bracket 33 in the front-rear direction Y.

  The rotation axis of the first wheel 34 extends in the front-rear direction Y. The first wheel 34 protrudes from the bracket 33 to the outside in the left-right direction X (on the opposite side of the jig body 11). The first wheel 34 is movable along the elongated hole 35 with respect to the bracket 33. The first wheel 34 can be switched between a first state in which the position in the left-right direction X is movable and a second state in which the position in the left-right direction X is substantially immovable.

The moving mechanism 14 moves the expansion / contraction part 12 and the pair of contact parts 15. In the present embodiment, the moving mechanism 14 moves the expansion / contraction part 12 and the pair of contact parts 15 via the jig body 11.
The moving mechanism 14 includes a pair of left and right second wheels 36 that are rotatably fixed to the base frame 16. The pair of second wheels 36 sandwich a portion of the extendable portion 12 that protrudes downward from the base frame 16 in the left-right direction X. The rotation axis of each second wheel 36 extends in the left-right direction X. Each second wheel 36 rolls in the front-rear direction Y and moves the jig body 11 in the front-rear direction Y.

  A method for transporting the tube 50 using the jig 10 will be described with reference to FIGS.

In the present embodiment, a transport vehicle 60 as shown in FIG. 5 is used for transport. Prior to the description of the transport method, the transport vehicle 60 will be described first.
The transport vehicle 60 is an automobile having a loading platform 61. A tube 50 is placed on the loading platform 61. At this time, the pipe 50 is placed so that the width direction W1 of the pipe 50 coincides with the vehicle width direction W2 of the transport vehicle 60, and the tube axis direction of the pipe 50 coincides with the traveling direction of the transport vehicle 60. On the loading platform 61, a temporary pawl 62 for supporting the pipe 50 before forming the above-described vertical flat shape and a main pawl 63 for supporting the pipe 50 after forming the vertical flat shape are provided movably. Yes.

  The temporary pawl 62 and the main pawl 63 are each provided with a pair of blocks 62a and 63a arranged at intervals in the vehicle width direction W2. Each of the blocks 62a and 63a is formed in a right triangle shape when the transport vehicle 60 is viewed from the front direction. In a state before the pipe 50 is placed on the transport vehicle 60, the temporary pawl 62 is disposed between the pair of blocks 63 a of the pawl 63.

  In the front view, the angle θ1 formed by the hypotenuse of the block 62a in the temporary pawl 62 with respect to the horizontal line extending in the vehicle width direction W2 is greater than the angle θ2 formed by the hypotenuse of the block 63a in the main pawl 63 with respect to the horizontal line. small. Thereby, the temporary pawl 62 can stably support the tube 50 before forming the vertical flat shape, and the main pawl 63 can stably support the tube 50 after forming the vertical flat shape.

  Next, a method for transporting the pipe 50 will be described. In the present embodiment, the pipe 50 in which the jig 10 is disposed is transported in a state where the pipe 50 is flattened in the up-down direction Z by extending the stretchable part 12. Below, it demonstrates from the state before putting the pipe | tube 50 on the transport vehicle 60. FIG.

  First, the restricting mechanism 13 and the adjusting mechanism 22 are used to bring the expansion / contraction part 12 of the jig 10 into the most contracted state. Further, the position of the contact portion 15 in the left-right direction X is set. The position of the contact portion 15 is adjusted according to the degree of vertical flatness that the jig 10 aims. At this time, the distance between the pair of contact portions 15 is smaller than the inner diameter of the tube 50.

Next, as shown in FIG. 3, the jig 10 is disposed in the tube 50 in a state where the pair of contact portions 15 are not in contact. At this time, the jig 10 is moved in the tube axis direction in the tube 50 by using the moving mechanism 14.
Then, the expansion / contraction part 12 is extended using the adjustment mechanism 22, and both end portions of the expansion / contraction part 12 are brought into contact with the inner peripheral surface of the pipe 50. At this time, the tube 50 is not flattened, but only at a stage where the expandable portion 12 is simply brought into contact with the tube 50. Therefore, a gap in the left-right direction X is provided between the contact portion 15 and the inner peripheral surface of the pipe 50.

The above-mentioned jig-equipped tube 50 </ b> A is placed on the platform 61 of the transport vehicle 60. At this time, first, the tube 50 is placed on the temporary pawl 62 as shown by a two-dot chain line in FIG.
When the level is provided, the jig 10 may be centered using the level. That is, even if the expansion / contraction part 12 of the jig 10 extends in a state inclined with respect to the vertical direction Z, the pipe 50 is extended and deformed in the inclined direction. By using the level, the stretchable part 12 can be oriented in the vertical direction Z with high accuracy, and the tube 50 can be extended and deformed (vertically flattened) in the vertical direction Z with high accuracy.

  In the illustrated example, the contact portion 15 is formed by the first wheel 34. Therefore, even when the contact portion 15 hits the inner surface of the pipe 50 when the jig 10 is centered (change in orientation), the first wheel 34 rotates. Therefore, the contact portion 15 is not easily caught on the inner surface of the tube 50. As a result, the operation of centering the jig 10 is restricted, and the inner surface of the tube 50 is suppressed from being damaged.

  Thereafter, the expansion / contraction part 12 is extended in the vertical direction Z in a state where both ends of the expansion / contraction part 12 are abutted against the inner peripheral surface of the pipe 50, so that the pipe 50 is forcibly extended in the vertical direction Z and the width direction W <b> 1. The pair of contact portions 15 are brought into contact with the inner peripheral surface of the tube 50. At this time, both end portions of the stretchable portion 12 and the pair of contact portions 15 are in contact with the inner peripheral surface of the tube 50. As a result, further contraction deformation of the tube 50 in the width direction W <b> 1 is restricted by the contact portion 15. At this time, the load acting on the contact portion 15 from the pipe 50 is smaller than the load acting on the abutting member 21 from the pipe 50. Although depending on the thickness of the tube 50, if the tube 50 is an FRP tube or an FRPM tube, the width in the width direction W1 can be reduced to, for example, 5% of the diameter of the initial cross-sectional circle.

Thereafter, the temporary pawl 62 is removed and the block 63 a of the main pawl 63 is moved inward in the width direction W <b> 1, and the tube 50 is supported by the pawl 63. Further, the tube 50 is tightened with a nylon sling or the like. Thereby, preparation for transportation of the pipe 50 is completed.
After the pipe 50 is transported by the transport vehicle 60, the telescopic portion 12 is contracted before the tube 50 is lowered from the transport vehicle 60. At this time, the pipe 50 is restored and deformed by the restoring force of the pipe 50. Thereafter, the pipe 50 is lowered from the transport vehicle 60 and the jig 10 is removed, whereby the transport of the pipe 50 is completed.

  As described above, according to the jig 10 according to the present embodiment, after the jig 10 is disposed in the tube 50 in a state where the pair of contact portions 15 are not in contact with each other, both end portions of the stretchable portion 12 are disposed. The tube 50 can be vertically flattened by extending the stretchable portion 12 in the up-down direction Z in a state where the tube 50 is abutted against the inner peripheral surface of the tube 50. When the pair of abutment portions 15 abut on the inner peripheral surface of the tube 50, the expansion of the expansion / contraction portion 12 is stopped, whereby the deformation amount of the tube 50 is changed in the width direction W1 (left and right) between the pair of abutment portions 15. The distance in the direction X) can be stabilized. Thereby, the pipe | tube 50 can be deform | transformed accurately.

The contact portion 15 is movable in the width direction W1 with respect to the stretchable portion 12. Therefore, it is possible to adjust the distance in the width direction W1 between the pair of abutting portions 15 serving as a reference for the deformation amount of the tube 50. Thereby, the pipe | tube 50 can be accurately deformed to various deformation amounts.
The moving mechanism 14 moves the expansion / contraction part 12 and the pair of contact parts 15. Therefore, for example, the jig 10 disposed in the tube 50 from the end of the tube 50 can be easily moved to the center of the tube 50 or the like. Thereby, workability etc. can be improved.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

The contact portion 15 may not include the first wheel 34. For example, the contact portion 15 may be formed of square material or the like, similar to the abutting portion. The contact portion 15 may not be movable in the left-right direction X. When the jig 10 is used for transporting the tube 50, the contact portion 15 may not be provided.
The moving mechanism 14 may not be provided.
The expansion / contraction part 12 may use a screw mechanism as power for expansion / contraction. A hydraulic jack or a laboratory jack may be employed for the extendable portion 12.

  In addition, it is possible to appropriately replace the constituent elements in the embodiment with known constituent elements without departing from the gist of the present invention, and the above-described modified examples may be appropriately combined.

DESCRIPTION OF SYMBOLS 10 Jig 12 Expansion-contraction part 14 Movement mechanism 15 Contact part 50 Pipe | tube 50A Pipe | tube X with a jig | tool
Z Vertical direction (first direction)

Claims (7)

A jig arranged in a pipe,
A stretchable part that stretches in a first direction;
A jig provided with a pair of contact portions disposed on both sides in a second direction intersecting the first direction with respect to the stretchable portion and fixed to the stretchable portion.   The jig according to claim 1, further comprising a moving mechanism that moves the stretchable part and the pair of contact parts.   The jig according to claim 1 or 2, wherein the contact portion is movable in the second direction with respect to the expansion and contraction portion.   The jig according to any one of claims 1 to 3, wherein the contact portion includes a wheel. Tube,
A jig according to any one of claims 1 to 4,
The jig-attached tube in which both end portions of the expansion and contraction portion and the pair of contact portions are in contact with the inner peripheral surface of the tube. A method of using the jig according to any one of claims 1 to 4,
Placing the jig in the tube in a state where the pair of contact portions are not in contact with each other;
The both ends of the expansion / contraction part are abutted against the inner peripheral surface of the tube, and the expansion / contraction part is expanded in the first direction, so that the tube contracts in the second direction while extending in the first direction. And a step of bringing the pair of contact portions into contact with the inner peripheral surface of the tube.   A method for transporting a pipe, in which a pipe having a telescopic part disposed therein is transported by a vehicle in a state where the pipe is flattened vertically by extending the telescopic part.

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