JP7404861B2 - Pipe material lowering device and pipe material connection method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a tube lowering device that is applied to a tube having screw mechanisms at both ends thereof, and a method for connecting tubes using the tube lowering device.

Conventionally, various methods have been studied to make a long member by connecting pipe members each having a threaded mechanism at both ends in an upright position.

For example, in Patent Document 1, a preceding steel pipe is inserted into an underground hole in an upright position, and the body of the steel pipe is held by a holder provided above ground. Next, the trailing steel pipe is suspended by a crane via a wire, and the cylindrical male threaded part provided at the bottom end of the trailing steel pipe is fitted into the cylindrical female threaded part provided at the top end of the leading steel pipe. Perform axis alignment. Thereafter, the trailing steel pipe is suspended and rotated, and the cylindrical male threaded portion of the trailing steel pipe is screwed into the cylindrical female threaded portion of the preceding steel pipe, thereby connecting the two.

When connecting a trailing steel pipe to a leading steel pipe using the method described in Patent Document 1, as the rotation work progresses, the trailing steel pipe gradually descends and connects the cylindrical male threaded portion to the cylindrical female thread of the leading steel pipe. Insert it into the section.

Then, as the trailing steel pipe descends, a tensile force is applied to the wire, increasing the hanging load of the crane, which may cause the crane to overturn or the boom to break. Further, the frictional resistance between the cylindrical male threaded portion of the succeeding steel pipe and the cylindrical female threaded portion of the preceding steel pipe will also increase, and the connection work will also require a great deal of effort.

JP 2017-44012 Publication

The above phenomenon can be avoided by taking various measures, such as extending the boom of the crane or setting a long hanging length of the wire, in a construction environment that does not have free head restrictions. It is possible.

However, in a construction environment with low air head, it is difficult to take such measures. For this reason, the work of rotating the trailing steel pipe and the work of keeping the hanging load of the crane within a predetermined range by letting out the wire in stages according to the amount of descent of the steel pipe and adjusting the hanging length are carried out in parallel. The work tends to be complicated and problems arise in terms of construction.

In addition, regardless of whether or not there is an air head restriction, the work of removing the wire after the connection work of the following steel pipe to the preceding steel pipe is completed requires work at height, so it is important to ensure safety of the work and to install work scaffolds. This caused problems, such as additional work required.

The present invention has been made in view of such problems, and its main purpose is to provide a pipe material lowering device and a pipe material connection method that can efficiently connect pipe materials equipped with a screw mechanism in an upright position. It is to be.

In order to achieve such an object, the pipe material lowering device of the present invention includes a connecting cylinder connected to the upper end of the pipe in an upright position, and a hanging material installation part covered with the connecting cylinder. The connecting cylinder includes a threaded portion that is screwed into a threaded mechanism provided at the upper end of the pipe, and the hanging material installation portion includes a plurality of hanging pieces to which hanging materials are attached, and the hanging material. The present invention is characterized in that it includes a hanging beam having a hanging piece provided on the upper surface thereof and surrounded by the connecting cylinder . Alternatively, a hanging material installation part is provided on the connecting cylinder via a fastener. Furthermore, the suspension beam is characterized in that it includes a plurality of beam members extending in a radial direction from a central axis in a plan view.

According to the pipe material lowering device of the present invention, by connecting the connecting cylinder to the upper end of the pipe material and providing a hanging material such as a hanging wire in the hanging material installation part, the pipe material can be easily suspended via the hanging material. I can do it.

In addition, by rotating the pipe material attached to the pipe material lowering device in a suspended state, the pipe material is gradually lowered relative to the pipe material descending device, and after rotating a predetermined number of times, the pipe material is connected to the connecting cylinder. You can also cancel the connection. Therefore, when removing the hanging material from the upper end of the pipe in an upright position, it is possible to save the effort of constructing scaffolding and performing the work at height, and it is possible to simplify the work and improve safety.

Further, the method for connecting pipe materials of the present invention is a method for connecting a plurality of pipe materials in an upright position using the pipe material lowering device of the present invention via screw mechanisms provided at both ends of the pipe materials. Then, the trailing pipe with the pipe lowering device attached thereto is suspended above the leading pipe placed in a predetermined position in an upright position, and the axes of the trailing pipe are aligned. It is characterized in that it is rotated around the axis in a suspended state and connected to the preceding pipe material while being lowered relative to the pipe material lowering device.

According to the pipe connecting method of the present invention, in order to connect the trailing pipe to the leading pipe, when the trailing pipe is rotated around its axis while the leading pipe and the pipe lowering device are not rotating, Since the trailing tube is threadedly connected to the leading tube, it gradually descends, but the tube lowering device is interlocked and can maintain its height position without descending. Thereby, no tensile force that would increase the hanging load is applied to the hanging material attached to the pipe lowering device or the lifting device such as a crane.

Therefore, there is no need to equip the hanging material or lifting device with equipment that assumes an excessive lifting load that exceeds the own weight of the pipe material. In addition, even in a construction environment with low air head, the work of rotating the trailing pipe material and the work of maintaining the lifting load of the lifting device within a predetermined range according to the amount of descent of the pipe material are performed in parallel, which is a complicated task. You can omit some work. This makes it possible to significantly improve workability when connecting multiple pipe bodies in an upright position in any construction environment.

According to the present invention, when the pipe material attached to the pipe material lowering device is rotated around the axis in a suspended state, only the pipe material is lowered relative to the pipe material lowering device, and the hanging material and the lifting device attached to the pipe material lowering device are lowered. When connecting pipes equipped with screw mechanisms in an upright position, a pipe lowering device is attached to the pipes that are rotated around their axis while suspended, so that no tensile force is applied that would increase the hanging load. This makes it possible to significantly improve the efficiency of connection work.

1 is a diagram schematically showing a pipe material lowering device in an embodiment of the present invention. It is a figure showing a suspension beam of a pipe lowering device in an embodiment of the present invention. It is a figure which shows the connection cylinder of the pipe material lowering device in embodiment of this invention. FIG. 2 is a diagram (part 1) showing a method for connecting steel pipe members in an embodiment of the present invention. FIG. 2 is a diagram showing a method for connecting steel pipe members in an embodiment of the present invention (part 2). It is a figure which shows the other example of the connection method of the steel pipe member in embodiment of this invention. It is a figure which shows the other example of the hanging material installation part of the pipe material lowering apparatus in embodiment of this invention. It is a figure which shows the other example at the time of equipping a steel pipe member with the pipe material lowering device in embodiment of this invention.

The present invention is an apparatus and method suitable for connecting a plurality of tube members each having a screw mechanism at both ends in an upright position. Although any pipe material may be used, in this embodiment, a steel pipe member is taken as an example, and its details will be explained below with reference to FIGS. 1 to 6. Note that the pipe material is not limited to steel pipe members, and may be used for columns, piles, structural pillars, etc.

As shown in FIG. 1(a), the steel pipe member 10 is provided with a male threaded pipe 15 constituting a screw mechanism 13 at its lower end, and a female threaded pipe 14 at its upper end. Then, the pipe material lowering device 1 is attached to this female threaded pipe 14, and the hanging wire 16 is attached to the pipe material lowering device 1, so that the steel pipe member 10 is attached to a lifting device such as a crane via the hanging wire 16. It is suspended by.

Then, the steel pipe member 10, which is in an upright position due to being suspended, rotates around the axis by applying a rotational force, gradually descends relative to the pipe material lowering device 1, and rotates a predetermined number of times. Thereafter, as shown in FIG. 1(b), it is removed from the tube lowering device 1. Details of the pipe material lowering device 1 will be explained below with reference to FIGS. 1 to 3.

≪≪Pipe lowering device≫≫
As shown in FIG. 1(b), the pipe material lowering device 1 includes a hanging beam 2 to which a hanging wire 16 is attached, and a connecting cylinder 3 connected to a steel pipe member 10.

As shown in FIG. 2(a), the suspension beam 2 includes a plurality of beam members 21 provided to extend in a radial direction from the central axis C in plan view, and as shown in FIG. 2(b), It includes a plurality of suspension holders 22 provided on the upper surface of the beam member 21 and a central suspension piece 23 similarly provided on the upper surface of the beam member 21.

The beam member 21 may be made of any material as long as it does not bend when the steel pipe member 10 is suspended, and in this embodiment, a steel material such as H-shaped steel is used. Further, a rib plate 211 is provided near the tip in the radial direction for stiffening, and a hanging holder 22 is provided above the rib plate 211.

The suspension holder 22 is a piece of steel fixed to each of the radial ends of the beam member 21, and a suspension piece 221 to which the suspension wire 16 is secured is provided on the upper surface of the suspension piece 221. A similar hanging piece 221 is provided so as to protrude. In addition, in this embodiment, all the hanging holders 22 are provided with hanging pieces 221 provided on the side surfaces.

On the other hand, the hanging pieces 221 provided on the upper surface are provided only at two hanging holders 22 arranged in parallel at equal intervals with the central axis C in between. However, as long as the installation position is such that the steel pipe member 10 can be suspended vertically, it may be installed at a position where it can be supported at 3 or 4 points during sling work, or it may be installed at a position where it can be supported at 3 or 4 points during sling work, or it may be installed at a position where it can be supported at 3 or 4 points during sling work. It may be provided for all.

Furthermore, as shown in FIG. 2(b), a connecting plate 222 made of a steel plate or the like is provided on the lower surface of the hanging holder 22 so as to protrude from the tip of the beam member 21. The connecting plate 222 is provided with a fastener through hole through which a fastener 4 such as a bolt is passed, which is used when joining the connecting cylinder 3 to be described later.

The central hanging piece 23 is a metal fitting to which a hanging fitting 173 such as a hanging ring, shackle, or hook can be attached, and is provided on the upper surface of the beam member 21 and on the central axis C of the hanging beam 2. Note that the installation position of the central hanging piece 23 is not limited to this, and for example, it may be placed at two locations on the upper surface of the beam member 21 with the central axis C of the hanging beam 2 interposed therebetween. Furthermore, the central hanging piece 23 does not necessarily need to be provided.

As shown in FIG. 3(a), the hanging beam 2 having such a configuration is covered with a connecting cylinder 3 made of a cylindrical body, and both are connected via a fastener 4.

As shown in FIG. 3(b), the connecting cylinder 3 includes a beam mounting ring 31 that connects to the hanging beam 2, a threaded cylinder 32 provided on the beam mounting ring 31, and a threaded cylinder 32 provided on the threaded cylinder 32. and a male threaded portion 33.

The beam attachment ring 31 is made of a ring member having a predetermined thickness, and is formed in such a size that its upper surface comes into contact with the lower surface of the connecting plate 222 provided on the suspension beam 2. Further, on the upper surface of the beam attachment ring 31, a plurality of bolt fitting holes into which the fasteners 4 are fitted are provided at intervals in the circumferential direction.

As shown in FIGS. 3(b) and 3(c), the threaded cylinder 32 is a cylinder having approximately the same diameter as the beam attachment ring 31, and its upper surface is joined to the lower surface of the beam attachment ring 31. A male threaded portion 33 is provided on the surface.

The male threaded portion 33 has a shape that is screwed into the female threaded pipe 14 provided at the upper end of the steel pipe member 10, that is, the same shape as the male threaded portion formed on the male threaded pipe 15 (root diameter, mountain diameter, pitch, and thread). The numbers are the same). In addition, the number of threads of the male screw part 33 may be set according to the number of rotations when rotating the steel pipe member 10 and the thread multiplier in order to release the connection between the pipe material lowering device 1 and the steel pipe member 10. .

For example, in a state where the screw mechanism 13 consisting of the female threaded pipe 14 and the male threaded pipe 15 provided in the steel pipe member 10 employs a four thread thread, by rotating the steel pipe member 10 two and a half turns, the pipe material is removed from the steel pipe member 10. If it is desired to remove the descending device 1, the number of threads may be set to 10 (number of threads x number of rotations).

Thereby, the pipe material lowering device 1 screws together the male threaded part 33 formed in the connecting cylinder 3 and the female threaded part of the female threaded pipe 14 provided at the upper end of the steel pipe member 10. is screwed to the female threaded pipe 14 of the steel pipe member 10, and is in a state where it is mounted on the steel pipe member 10. As shown in FIG. 1(a), by attaching the suspension wire 16 to the suspension beam 2, the steel pipe member 10 can be easily suspended via the suspension wire 16.

On the other hand, the steel pipe member 10 is rotated around its axis in a suspended state, so that it gradually lowers with respect to the pipe material lowering device 1, and after rotating a predetermined number of times (two and a half revolutions in this embodiment). 1B, the threaded connection between the connecting cylinder 3 and the female threaded pipe 14 of the steel pipe member 10 is released, and the pipe lowering device 1 can be removed from the steel pipe member 10. Therefore, when removing the hanging material from the upper end of the steel pipe member 10 in an upright position, it is possible to save the time and effort of constructing scaffolding and working at heights, simplifying the work and improving safety. Become.

≪≪How to connect pipe materials≫≫
Using the pipe material lowering device 1 with such a configuration, as shown in FIG. A method of connecting pipes for splicing in an upright position will be described below with reference to FIGS. 4 and 5.

In addition, as shown in FIG. 5(c), the lower steel pipe member 11 is inserted into the underground hole H, with the female threaded pipe 14 provided at the upper end protruding upward from the ground surface. For example, it is held in an upright position via a holder 18 arranged so as to surround the underground hole H.

First, as shown in FIG. 4(a), the upper steel pipe member 12 is placed on the pedestal 19 on the ground in a laid-down position, and then the axes of the upper steel pipe member 12 and the pipe lowering device 1 are aligned. Note that the pipe material lowering device 1 is suspended via a suspension wire 16 attached to the suspension beam 2, for example.

When the axis alignment is completed, as shown in FIG. 4(b), the connecting cylinder 3 of the pipe lowering device 1 is inserted into the female threaded pipe 14 of the upper steel pipe member 12 and screwed together, thereby screwing them together. Then, the pipe lowering device 1 is attached to the upper steel pipe member 12.

Next, as shown in FIG. 4(c), the upper steel pipe member 12 equipped with the pipe lowering device 1 is erected by a crane (not shown) via the hanging wire 16, and the upper steel pipe member 12 in the upright position is lowered. Move it above the side steel pipe member 11.

As shown in FIG. 5(a), after moving the upper steel pipe member 12 in the upright position above the lower steel pipe member 11, the male threaded pipe 15 of the upper steel pipe member 12 is inserted into the female threaded pipe of the lower steel pipe member 11. 14 and bring them into contact with each other, and the axes of the upper steel pipe member 12 and the lower steel pipe member 11 are aligned.

After this, as shown in FIG. 5(b), a rotational force is applied to the suspended upper steel pipe member 12 using the pipe lowering device 1 to rotate it around the axis, and the male screw of the upper steel pipe member 12 is rotated. The pipe 15 is screwed into the female threaded pipe 14 of the lower steel pipe member 11. The male threaded pipe 15 provided at the lower end of the upper steel pipe member 12 gradually penetrates into the female threaded pipe 14 of the lower steel pipe member 11, but the female threaded pipe 14 provided at the upper end is threadedly connected to the connecting cylinder 3. will be gradually lifted.

Therefore, the upper steel pipe member 12 is gradually lowered with respect to the pipe lowering device 1, and the pipe lowering device 1 is maintained at its height position, so that the hanging wire 16 attached to the pipe lowering device 1 and the crane are Therefore, no tensile force is applied that would increase the hanging load.

Therefore, unlike the prior art, there is no need to equip the suspension wire 16 or the crane with equipment that assumes an excessive suspension load that exceeds the own weight of the upper steel pipe member 12. Furthermore, even in a construction environment with low air head, the work of rotating the upper steel pipe member 12 and the work of maintaining the hanging load of the crane within a predetermined range according to the amount of descent of the upper steel pipe member 12 can be performed in parallel. You can omit complicated work. This makes it possible to significantly improve workability when connecting a plurality of steel pipe members 10 in an upright position in any construction environment.

In particular, in construction sites with low air head or narrow spaces, the number of times of connection work increases as the steel pipe members 10 used are also short and small. becomes possible.

Then, when the upper steel pipe member 12 is rotated a predetermined number of times, as shown in FIG. While the pipe 15 and the female threaded pipe 14 of the lower steel pipe member 11 are screwed together, the pipe lowering device 1 is removed from the upper steel pipe member 12.

Therefore, work at a high place for removing the hanging wire 16 from the upper steel pipe member 12 can be omitted, and work efficiency can be further improved. Thereafter, if necessary, the upper steel pipe member 12 is further rotated and the screws are sufficiently tightened, so that the upper steel pipe member 12 and the lower steel pipe member 11 are connected by a screw connection.

The pipe material lowering device 1 and the pipe material connection method of the present invention are not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention.

For example, in the present embodiment, since the female threaded pipe 14 is provided at the upper end of the steel pipe member 10 in the upright position, the male threaded portion 33 is provided on the connecting cylinder 3 constituting the pipe material lowering device 1. It is not necessarily limited to this. When the male threaded pipe 15 is provided at the upper end of the steel pipe member 10, it is preferable to provide the connecting cylinder 3 with a female threaded part that can be screwed into the male threaded pipe 15 in place of the male threaded part 33.

Further, in the present embodiment, the pipe material lowering device 1 is suspended by one hanging wire 16 to suspend and connect the steel pipe members 10, but the present invention is not limited to this.

For example, as shown in FIG. 6, two hanging wires 16 are suspended in parallel from a trolley 172 running on a transverse rail 171 of a portal crane 17, and these are attached to the hanging beam 2 of the pipe material lowering device 1. 10 may be suspended. Note that instead of the hanging wire 16, a hanging fitting 173 as shown in FIG. 2(b) may be used.

In this way, when a rotational force is applied to the steel pipe member 10 and the steel pipe member 10 is rotated around the axis, it is possible to suppress the phenomenon in which the pipe material lowering device 1 rotates together with the steel pipe member 10, so that the steel pipe member 10 can be rotated efficiently, and the pipe material It becomes possible to smoothly release the threaded connection between the connecting cylinder 3 of the descending device 1 and the female threaded pipe 14 of the steel pipe member 10.

Further, in this embodiment, the suspension beam 2 including a plurality of beam members 21 shown in FIG. 2 is employed as the suspension material installation section provided on the connecting cylinder 3 of the pipe material lowering device 1, but the invention is not necessarily limited to this. It's not a thing. For example, as shown in FIG. 7(a), the hanging beam 2 may have only one beam member 21, or as shown in FIG. 7(b), a circular A hanging piece 221, a central hanging piece 23, etc. may be provided on the lid material 24 made of a steel plate, and these may be used as a hanging material installation section. Alternatively, the connecting cylinder 3 may be processed to form a hanging material installation portion.

Furthermore, in this embodiment, when the pipe material lowering device 1 is attached to the upper steel pipe member 12, the upper steel pipe member 12 is placed in a collapsed position as shown in FIG. 4(b), but as shown in FIG. The upper steel pipe member 12 may be placed in an upright position and the pipe lowering device 1 may be attached to its upper end. In this way, while the pipe material lowering device 1 is suspended by a crane (not shown) via the hanging wire 16, by rotating the hanging fitting 173 such as the hook of the crane by the swivel mechanism 174, the upper steel pipe member 12 is suspended. On the other hand, it becomes possible to easily mount the pipe material lowering device 1.

1 Pipe lowering device 2 Hanging beam (hanging material installation part)
21 Beam member 22 Hanging holder 221 Hanging piece 222 Connecting plate 23 Central hanging piece 24 Lid material 3 Connection cylinder 31 Beam mounting ring 32 Threaded cylinder 33 Male thread part (threaded part)
4 Fasteners

10 Steel pipe members (tube materials)
11 Lower steel pipe member (preceding pipe material)
12 Upper steel pipe member (trailing pipe material)
13 Screw mechanism 14 Female threaded pipe 15 Male threaded pipe 16 Hanging wire (hanging material)
17 Gate type crane (lifting device)
171 Traverse rail 172 Trolley 173 Hanging fitting 174 Swivel mechanism 18 Holding tool 19 Frame H Underground hole

Claims (4)

a connecting cylinder connected to the upper end of the pipe in an upright position;
a hanging material installation part in which the connecting cylinder is sheathed ;
A pipe material lowering device comprising:
The connecting cylinder includes a threaded portion that is threaded into a threaded mechanism provided at the upper end of the tube,
The pipe material lowering device is characterized in that the hanging material installation section includes a plurality of hanging pieces to which hanging materials are attached, and a hanging beam having the hanging pieces provided on the upper surface and surrounded by the connecting cylinder. The pipe material lowering device according to claim 1,
A pipe material lowering device, characterized in that a hanging material installation part is provided on the connecting cylinder via a fastener . 2. The tube lowering device according to claim 1, wherein the suspension beam includes a plurality of beam members extending in a radial direction from a central axis in plan view . 4. A method for connecting a plurality of tubes in an upright position using the tube lowering device according to any one of claims 1 to 3 , using a screw mechanism provided at both ends of the tubes. hand,
After suspending the trailing pipe member equipped with the pipe lowering device above the leading pipe member placed at a predetermined position in an upright position and aligning the axis,
A method for connecting pipe materials, characterized in that the following pipe material is connected to the preceding pipe material while being rotated around an axis in a suspended state and lowered relative to the pipe material lowering device.

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