JP2016160679A - Support machine of multilayer pipe, addition equipment, addition removal method and addition method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support machine of a multilayer pipe which can facilitate the addition and the addition-removal of the multilayer pipe, and may be an existing multilayer pipe, addition equipment, an addition removal method and an addition method.SOLUTION: A support machine of a multilayer pipe 100 has: an outside pipe attachment implement 2 which is telescopic in an extension direction of the multilayer pipe 100; an inside pipe attachment implement 3 which exposes an end of the multilayer pipe 100 side in a contracted state of the outside attachment implement 2; and an upper-side support implement 4 which can move in the extension direction of the multilayer pipe which rotates around the outside pipe attachment implement 2 and the inside pipe attachment implement 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a multi-tube support machine, an extension facility, an extension method, and an extension method.

  At present, as a ground excavation method, a method using a multiple pipe having a drill bit or the like at the tip is known. In this construction method, the multiple pipe is supported by a support machine that moves in the vertical direction. In addition to moving the multi-pipe up and down, this multi-pipe support machine rotates about its axis.

  When excavating the ground using multiple pipes, depending on the depth of excavation, it is necessary to add multiple pipes (cone joints) or to remove joints (remove cones). For example, when the excavation depth reaches a predetermined length, another multiple pipe (second multiple pipe, second section) is added to the upper side of the multiple pipe (first multiple pipe, first section) being excavated. become. At the time of this addition, the pipes corresponding to each other, that is, the outer pipes and the inner pipes constituting the multiple pipe are connected by inserting a fixing pin or the like.

  However, the inner tube is covered with the outer tube, and a fixing pin or the like cannot be inserted (stabbed) or detached (removed) as it is. Therefore, the shape of the outer tube is devised, and even when the outer tube covers the inner tube, a fixing pin or the like can be inserted into the inner tube or the fixing pin or the like can be detached from the inner tube. It seems that multiple tubes have been invented.

  However, the place where the fixing pin or the like formed on the inner tube is inserted is usually slightly shifted or inclined. Therefore, an operator or the like inserts a fixing pin or the like while taking the deviation into consideration, but the inner tube cannot be visually observed in a form in which the shape of the outer tube is devised. As a result, the actual situation is that the operator cannot take into account the “displacement” of the inner tube and cannot smoothly insert the fixing pin or the like. In the first place, the form of devising the outer tube has a problem that the existing multiple tube cannot be used.

  Therefore, the present inventors considered that it is necessary to devise a support device for the multiple tube, not the multiple tube itself. And it came to refer to patent document 1 as a support machine which makes easy the addition and removal of a multiple pipe | tube. However, the proposal in the publication does not facilitate the addition or removal of multiple tubes.

JP 2006-118182 A

  The main problem to be solved by the invention is to facilitate the addition and removal of multiple tubes, and the multiple tubes may be existing multiple tubes. An object of the present invention is to provide an extension method and an extension method.

The present invention for solving the above problems is as follows.
(Invention of Claim 1)
A multi-tube support machine,
An outer tube fitting that can be expanded and contracted in the extending direction of the multiple tubes;
An inner tube fitting in which the end on the multiple tube side is exposed in a contracted state of the outer tube fitting;
An upper support that is movable in the direction of extension of the multiple tubes that rotates about the outer tube fitting and the inner tube fitting;
A multi-tube support machine comprising:

(Invention of Claim 2)
A telescopic tool is attached to the upper support,
This stretcher is also attached to the outer tube fitting,
The mounting structure for the outer tube fitting is a structure in which the outer tube fitting can rotate about its axis with respect to the telescopic tool and cannot move in the extending direction of the multiple tubes.
The outer tube fitting is configured to expand and contract in conjunction with expansion and contraction of the expansion and contraction tool.
The multi-tube support machine according to claim 1.

(Invention of Claim 3)
A support machine according to claim 1 or 2,
The multiple tube as the first multiple tube, and a tip tool attached to the distal end portion of the second multiple tube added to the first multiple tube,
The second multiple tube has an outer tube and an inner tube;
A position fastener that makes it impossible for the inner tube of the second multiple tube to move in the extending direction relative to the outer tube of the second multiple tube;
Multi-tube extension facility characterized by that.

(Invention of Claim 4)
A first outer pipe comprising a single unit outer pipe or a plurality of unit outer pipes connected in the axial direction to the outer pipe fitting provided in the support machine according to claim 1 or 2. The first inner pipe consisting of one unit inner pipe or the plurality of unit inner pipes connected in the axial direction is attached to the inner pipe fitting provided in the support machine. If
Remove the outer tube fitting and the unit outer tube, or connect the unit outer tubes adjacent to each other,
Shrink the outer tube fitting provided in the support machine to expose the attachment portion between the inner tube fitting and the unit inner tube, or the addition portion between the unit inner tubes adjacent to each other,
In the exposed portion, the inner pipe fitting and the unit inner pipe are removed, or unit inner pipes adjacent to each other are spliced together.
A method of adding multiple pipes characterized by the above.

(Invention of Claim 5)
The removal method according to claim 4, wherein in the excavation position, the outer pipe fitting and the unit outer pipe are removed, or the outer pipes adjacent to each other are joined together,
Further, the inner pipe fitting and the unit inner pipe are removed, or unit inner pipes adjacent to each other are connected to each other,
On the other hand, in a position other than the excavation position, the second multiple pipe provided with the outer pipe and the inner pipe is embedded in the ground,
Move the support machine to the embedded position of the second multi-pipe,
Attaching the inner pipe fitting provided in the support machine and the inner pipe of the second multiple pipe, or adding the unit inner pipe provided in the support machine and the inner pipe of the second multiple pipe,
Elongate the outer tube fitting provided in the support machine,
Attaching the outer pipe fitting provided in the support machine and the outer pipe of the second multiple pipe, or adding the unit outer pipe provided in the support machine and the outer pipe of the second multiple pipe,
While shrinking the outer pipe fitting provided in the support machine, the support machine is moved to the excavation position,
Adding the inner tube of the second multiple tube and the unit inner tube of the first multiple tube;
Elongate the outer tube fitting provided in the support machine,
Adding an outer tube of the second multiple tube and a unit outer tube of the first multiple tube;
A method of adding multiple pipes characterized by the above.

  According to the present invention, it is possible to facilitate the addition and removal of multiple tubes, and the multiple tubes may be existing multiple tubes, a multiple tube support machine, an extension facility, a removal method, and a connection. It becomes a method of addition.

It is a schematic diagram of the support machine of the multi-pipe in the state which the outer side pipe fixture extended. It is a schematic diagram of the support device of a multiple tube in the state where the outer tube fitting contracted and the outer tube was removed. It is a schematic diagram of the multi-tube support machine in a state where the multi-tube support machine moves upward and the inner pipe is removed. It is explanatory drawing of the work position in the case of adding a multiple pipe. It is explanatory drawing which shows the state which removed the outer tube | pipe from the support machine of a multiple tube | pipe. It is explanatory drawing which shows the state which covered the sheet | seat so that the clearance gap between an outer tube | pipe and an inner tube | pipe might be plugged up. It is explanatory drawing which shows the state which removed the inner pipe | tube from the support machine of a multiple pipe | tube. It is explanatory drawing which shows the state which installed the outer-pipe casing mount frame under the support machine of a multi-pipe. It is explanatory drawing which shows the state which has located the existing outer side pipe fixture on the outer pipe casing mount frame. It is explanatory drawing which shows the state which removed the existing outer pipe | tube attachment tool from the support machine of a multiple pipe | tube. It is explanatory drawing which shows the state which installed the inner-pipe casing mount frame under the support machine of a multi-pipe. It is explanatory drawing which shows the state which located the existing inner side pipe fixture on the inner pipe casing mount frame. It is explanatory drawing which shows the state which removed the existing inner pipe | tube attachment tool from the support machine of a multiple pipe | tube. It is explanatory drawing which shows the state which mounted the inner side pipe fixture (upper part) of this form on the inner pipe casing mount frame. It is explanatory drawing which shows the state which made the multi-tube support machine contact | abut the inner side pipe attachment (upper part) of this form. It is explanatory drawing which shows the state which attached the inner side pipe fixture (upper part) of this form to the support machine of a multiple pipe | tube. It is explanatory drawing which shows the state which attached the expansion / contraction tool to the support machine of a multiple tube. It is explanatory drawing which shows the state which attached the lower side support tool to the expansion / contraction tool. It is explanatory drawing which shows the state which attached the inner pipe fitting (lower side part) of this form to the inner pipe fitting (upper part) of this form, and constructed | assembled the inner pipe fitting. It is explanatory drawing which shows the state (1) which attached the holder to the outer side tube attachment of this form, and the state (2) which mounted this on the outer pipe casing mount frame. It is explanatory drawing which shows the state which installed the outer side tube attachment of this form which attached the holder to the downward direction of the support machine of a multiple tube. It is explanatory drawing which shows the state which attached the outer side pipe | tube fixture of this form to the support machine of a multiple pipe | tube. It is explanatory drawing which shows the state which the support machine of the multiple tube supported the 2nd double tube in the deposit position. It is explanatory drawing which shows the state which embedded the 2nd double pipe | tube in the ground. It is explanatory drawing which shows the state which removed the outer pipe | tube of the 2nd double pipe | tube, and attached the position fastener of the inner pipe | tube. It is explanatory drawing which shows the state which removed the inner pipe | tube of the 2nd double pipe. It is explanatory drawing which shows the state which located the support machine of the multiple tube on the 2nd double tube. It is explanatory drawing which shows the state which attached the inner tube fixture of the support machine of a multiple tube, and the inner tube of the 2nd double tube. It is explanatory drawing which shows the state which removed the position fastener of the inner pipe of the 2nd double pipe. It is explanatory drawing which shows the state which attached the outer side pipe | tube fixture of the support machine of a multiple pipe | tube, and the outer pipe | tube of a 2nd double pipe. It is explanatory drawing which shows the state which pulled up the 2nd double pipe. It is explanatory drawing which shows the state which removed the tip tool from the 2nd double tube. It is explanatory drawing which shows the state which has located the 2nd double pipe on the 1st double pipe. It is explanatory drawing which shows the state which added the inner pipe of the 2nd double pipe, and the inner pipe of the 1st double pipe. It is explanatory drawing which shows the state which removed the position fastener of the inner pipe of the 1st double pipe. It is explanatory drawing which shows the state which added the outer pipe of the 2nd double pipe, and the outer pipe of the 1st double pipe. It is a processing flow figure of the double pipe addition method.

Next, a mode for carrying out the present invention will be described by taking as an example a case where the multiple pipe is a double pipe and the excavation direction, that is, the extending direction of the multiple pipe is the vertical direction.
In the present specification, a tube positioned relatively outside is referred to as an “outer tube”, and a tube positioned relatively inside is referred to as an “inner tube”. The outer tube is simply referred to as an “outer tube”, and the relatively inner tube is also referred to as an “inner tube”. In general, the terms “addition” and “removal” are used when the target is a member of the same type (for example, between the outer tube and the inner tube). However, in this specification, the term “addition” or “separation” may be used even when the object is not the same type of members.

(Multi-tube support machine)
As shown in FIG. 1, the support machine 1 according to the present embodiment mainly includes an outer pipe fitting 2, an inner pipe fitting 3, an upper support 4, a telescopic tool 5, and a lower support 6. Have.

  The outer tube fitting 2 is composed of a cylindrical upper part 2A and a cylindrical lower part 2B that slides up and down in the upper part 2A. The outer tube fitting 2 expands and contracts (extends and contracts) in the vertical direction as a whole by sliding the lower side portion 2B.

  The inner pipe fitting 3 is cylindrical and is disposed in the outer pipe fitting 2. As shown in FIG. 2, when the outer tube fitting 2 contracts, the end of the inner tube fitting 3 on the first double tube 100 side, that is, the lower end is exposed. However, unlike the illustrated example, the lower end portion of the inner tube fitting 3 may be exposed even when the outer tube fitting 2 is not contracted.

  The upper support 4 moves in the vertical direction along a support shaft 91 such as a leader. The upper support 4 supports the outer tube attachment 2 and the inner tube attachment 3, and in this support state, the outer tube attachment 2 and the inner tube attachment 3 can be rotated about their respective axes. . This rotational direction may be the same or opposite.

  The telescopic tool 5 has an upper end attached to the upper support 4 and a lower end attached to the lower support 6. The extendable tool 5 expands and contracts in the vertical direction, and the distance between the upper support tool 4 and the lower support tool 6 is changed by the expansion and contraction. The telescopic tool 5 is composed of, for example, a hydraulic cylinder.

  The lower support 6 is attached to the lower end of the telescopic tool 5, and is further attached to the lower part 2 </ b> B of the outer tube fitting 2. The attachment structure of the lower side part 2B and the lower side support tool 6 is such that the outer pipe fitting 2 composed of the upper side part 2A and the lower side part 2B with respect to the telescopic tool 5 and the lower side support tool 6 is around the axis Although it is rotatable, it has a structure incapable of moving in the vertical direction.

  In particular, in this embodiment, a pair of annular projections 2X projecting radially outward are formed on the lower side portion 2B of the outer tube fitting 2, and the lower support 6 is disposed between the pair of projections 2X. The contact portion 6a is inserted. Thereby, the lower side support tool 6 and the lower side part 2B interlock | cooperate to an up-down direction. As a result, the lower part 2B moves in the vertical direction in conjunction with the expansion and contraction of the expansion / contraction tool 5, and the outer tube fitting 2 expands and contracts in the vertical direction as a whole.

  As the lower side portion 2B rotates, frictional heat is generated between the outer peripheral surface of the lower side portion 2B and the inner peripheral surface of the contact portion 6a. Therefore, it is preferable to put oil or the like between them. In this embodiment, since there is no member or the like that covers the space between the outer peripheral surface of the lower side portion 2B and the inner peripheral surface of the contact portion 6a, the construction can be continued smoothly and safely only by applying oil or the like. .

  Unlike this embodiment, the arrangement of the lower support 6 is omitted, and the shape of the expansion / contraction tool 5 is different, so that the expansion / contraction tool 5 is directly attached to the lower side portion 2B of the outer tube fitting 2. It can also be a structure.

(Removal method of double pipe)
Next, a method of removing the double pipe using the above support machine 1 (a method of removing the cone) will be described.
In this description, the first outer tube 101 composed of one unit outer tube or the first outer tube 101 composed of a plurality of unit outer tubes added in the axial direction is attached to the outer tube fitting 2, It is assumed that the first inner pipe 102 made up of one unit inner pipe or the first inner pipe 102 made up of a plurality of unit inner pipes connected in the axial direction is attached to the inner pipe fitting 3. .

  In addition, the removal (separation) location may be the unit outer pipes adjacent to each other or the unit inner pipes adjacent to each other, but in the following, the first outer pipe 101 is one unit outer pipe. The first inner pipe 102 is constructed by one unit inner pipe, and the outer pipe fitting 2 and the unit outer pipe (first outer pipe 101) are connected to the inner pipe fitting 3 and the unit inner pipe. The case where the (first inner pipe 102) is removed and the first double pipe 100 is removed will be described as an example.

  In connecting the first double pipe 100, first, the first outer pipe 101 is removed from the outer pipe fitting 2. Usually, the outer tube fitting 2 and the first outer tube 101 are connected (connected) with a fixing pin or the like as a fastener, and therefore, in this removal, the fixing pin is detached.

  Next, as shown in FIG. 2, the extender 5 provided in the support machine 1 is contracted. By this contraction, the outer tube fitting 2 is also contracted as described above. When the outer tube fitting 2 contracts, the attachment portion between the lower end portion of the inner tube attachment 3 and the upper end portion of the first inner tube 102 is exposed.

  Therefore, the first inner tube 102 is removed from the inner tube fitting 3 at the exposed portion. Usually, since the inner pipe fitting 3 and the first inner pipe 102 are connected (connected) by a fixing pin or the like as a fastener, the fixing pin is detached even in this removal.

  In the conventional removal method, it has been difficult to remove the first inner tube 102. However, when the support machine 1 according to the present embodiment is used, the mounting portion of the first inner pipe 102 can be easily exposed as described above, and therefore the first inner pipe 102 can be easily removed. It becomes work.

  When the fixing pin or the like of the first inner pipe 102 is removed, the entire support machine 1 including the upper support 4 is moved upward as shown in FIG. By this movement, the first inner tube 102 is completely removed, and the first double tube 100 is removed from the support machine 1.

(Double pipe extension facilities and methods)
Next, excavation work is performed using the first double pipe 100, and the second double pipe 200 is attached to the first double pipe 100 using the support machine 1 of the present embodiment during the excavation work. A method of adding (cone connecting methods) will be described. That is, it is a method of adding the second node (second double tube 200) to the upper side of the first node (first double tube 100).

  As shown in FIG. 4, in the method of the present embodiment, there are work at the “excavation position” and work at the “deposit position” that is a position other than the excavation position. Here, the excavation position means a place where excavator 90 and first double pipe 100 are used to excavate or drill ground G. On the other hand, the deposit position means a place where the second double pipe 200 is temporarily placed.

  The excavator 90 is movable, and includes, for example, a base machine 95 that allows the excavator 90 to move, a leader 91 that extends upward from the base machine 95, a backstay 92 that supports the leader 91, and the like. . The excavator 90 moves back and forth between the excavation position and the deposit position.

  The excavator 90 is attached with the support machine 1 according to the present embodiment or an apparatus in which a part of the members constituting the support machine 1 is different. The device in which a part of the members constituting the support machine 1 is different is a conventionally used device that is attached to the excavator 90, supports a double pipe, and rotates around an axis. It is an apparatus in which a part of the member is different from the support machine 1 in the form. Although this device is not suitable for the addition of a double pipe, in the following, for the sake of easy explanation, this device is simply described as “supporting machine 1 having a part of members different”. Sometimes.

  In this embodiment, the support machine 1 is configured such that the upper support 4 directly moves in the vertical direction along the leader 91 by vertical movement means constituted by a wire 93, a hoisting machine, or the like. .

  The support machine 1 supports the first double pipe 100 and rotates around the axis. The distal end of the first double pipe 100 is usually provided with an excavation head 103 for excavating the ground G, a stirring blade 104 for agitating the excavated ground G, and the like. The first double pipe 100 moves in the vertical direction as the support machine 1 moves in the vertical direction.

  Hereinafter, as shown in FIG. 37, the method of removing the first double pipe 100 from the support machine 1 having a part of the members different from each other as shown in FIG. With reference to FIGS. 8 to 22, “Method for constructing the support machine 1 of this embodiment from the support machine 1 having a part of different members” and with reference to FIGS. "Temporary Placement Method", "Method for Recovering Second Double Pipe 200" with reference to FIGS. 27 to 32, and "Second Double Pipe with reference to FIGS. 33 to 36" The method of adding 200 to the first double pipe 100 will be described. In FIGS. 5 to 36, the “work position” (excavation position or deposit position) of the work to be illustrated is shown at the upper end of the drawing.

  When removing the first double pipe 100 from the support machine 1 having a part of the members, first, as shown in FIG. 5, at the excavation position, the fixing pin P, which is a fastener of the outer pipe 101, is removed and the upper support is supported. The tool 4 is moved upward. Thereby, the outer pipe | tube 101 is removed from the outer side pipe attachment (existing outer side pipe attachment) 82 of the support machine 1 from which a part of member differs.

  In this regard, as shown in the illustrated example, when the first double pipe 100 is attached to the support machine 1 having different members, the outer pipe 101 has a special shape when the first double pipe 100 is removed. Unless it is etc., it is necessary to move upward the support machine 1 whole in which the member of a member differs. Therefore, if it is necessary to add the second double pipe 200, it is preferable to start the work by attaching the first double pipe 100 to the support machine 1 of the present embodiment from the beginning of construction.

  When removal of the outer tube 101 is completed, as shown in FIG. 6, the sheet 105 is covered so as to wrap the first double tube 100 so that dirt and the like do not enter between the outer tube 101 and the inner tube 102.

  Then, as shown in FIG. 7, the fixing pin P that is a fastener of the inner tube 102 is detached, and the upper support 4 is moved upward. Thereby, the inner pipe 102 is removed from the inner pipe fitting (existing inner pipe fitting) 83 of the support machine 1 having a part of the member, and the removal of the first double pipe 100 is completed.

  Next, a method for constructing the support machine 1 of the present embodiment from the support machine 1 having a part of members different from each other will be described.

  As described above, when the first double pipe 100 is removed from the support machine 1 having a part of different members, as shown in FIG. 8, the outer pipe casing base 51 is provided below the support machine 1 having a different part of the member. Is installed.

  Here, with respect to the difference in part of the member, in the support machine 1 in which part of the member is different, a conventional outer pipe fitting (existing outer pipe fitting) 82 is used instead of the outer pipe fitting 2 of the present embodiment. And a conventional inner pipe fitting (existing inner pipe fitting) 83 instead of the inner pipe fitting 3 of the present embodiment. Reference numeral 91A denotes a rail member extending in the vertical direction along the leader 91, and the upper support 4 moves in the vertical direction while being restrained by the rail member 91A.

  When the outer pipe casing mount 51 is installed, as shown in FIG. 9, the upper support 4 is moved downward, and the existing outer pipe fitting 82 is positioned on the outer pipe casing mount 51. And in this state, fasteners, such as a volt | bolt and a fixing pin, are removed, and the connection with the upper side support tool 4 and the existing outer tube | pipe attachment 82 is cancelled | released. This disconnection can be performed without using the outer pipe casing mount 51, but the use of the outer pipe casing mount 51 allows the work to proceed safely and smoothly.

  When the connection release of the existing outer tube fitting 82 is completed, the upper support 4 is moved upward as shown in FIG. By this movement, the existing outer tube fitting 82 is removed from the support machine 1.

  Next, the existing outer pipe attachment 82 and the outer pipe casing base 51 are moved to another, and the inner pipe casing base 52 is installed below the support machine 1 as shown in FIG.

  When the inner pipe casing mount 52 is installed, as shown in FIG. 12, the upper support 4 is moved downward, and the existing inner pipe fitting 83 is positioned on the inner pipe casing mount 52. And in this state, fasteners, such as a volt | bolt and a fixing pin, are removed, and the connection with the upper side support tool 4 and the existing inner pipe attachment tool 83 is cancelled | released. This disconnection can be performed without using the inner pipe casing mount 52, but by using the inner pipe casing mount 52, the work can be performed safely and smoothly. The inner pipe casing base 52 is used to replace the existing inner pipe fitting 103 with the inner pipe fitting 3 of the present embodiment. Depending on the shape, size, etc., the outer pipe casing base 51 may be used. It can also be used as it is.

  When the connection release of the existing inner pipe fitting 83 is completed, the upper support 4 is moved upward as shown in FIG. By this movement, the existing inner pipe fitting 83 is removed from the support machine 1.

  Next, the existing inner pipe fitting 83 left on the inner pipe casing base 52 is removed, and the upper part constituting the inner pipe fitting 3 of the present embodiment on the inner pipe casing base 52 as shown in FIG. 3A is placed.

  Then, as shown in FIG. 15, the upper support 4 is moved downward, and fasteners such as bolts and fixing pins are attached to connect the upper portion 3 </ b> A of the inner tube fitting 3 and the upper support 4.

  When this connection is completed, as shown in FIG. 16, the upper support 4 is moved upward, and the inner casing frame 52 is moved to the other. Thus far, the existing inner pipe fitting 83 has been replaced with the inner pipe fitting 3 of the present embodiment.

  Therefore, the outer tube fitting 2 of this embodiment is further attached. Before that, as shown in FIG. 17, the upper support 4 is moved downward again, and the lower end portion of the upper support 4 is moved. Attach the extender 5 to the arm. The extender 5 can be composed of, for example, a hydraulic cylinder. However, when using hydraulic cylinders, as shown in the enlarged front view in FIG. 17, a pair of hydraulic cylinders are attached in the left-right direction, and each hydraulic cylinder starts and ends in the front-rear direction (left-right direction). In a direction orthogonal to the horizontal direction of the paper). By configuring the hydraulic cylinder to rotate, it becomes easy to perform the attachment of the hydraulic cylinder, the attachment of the lower support 6 to be described below, the work in the vicinity of the hydraulic cylinder, and the like.

  When the attachment of the extender is completed, the upper indicator 4 is moved slightly upward as shown in FIG. 18, and the lower support 6 is attached to the lower end of the extender 5. By this attachment, the lower support tool 6 is attached to the upper support tool 4 via the extendable tool 5. Therefore, the lower support 6 moves in the vertical direction in conjunction with the upper support 4. However, the vertical movement means comprised by the wire 93 etc. with which the excavator 90 is equipped is connected with the lower side support tool 6, and the lower side support tool 6 is comprised mainly, and the upper side support tool 4 moves dependently. You can also

  When the attachment of the lower support 6 is finished, the lower part 3B of the inner pipe fitting 3 is attached to the upper part 3A of the inner pipe fitting 3, as shown in FIG. As a result, the inner tube fixture 3 constituted by the upper portion 3A and the lower portion 3B is attached to the upper support 4.

  In this regard, the lower side portion 3B is a member for allowing the lower end portion of the inner tube attachment portion 3 to be exposed from the outer tube attachment portion 2 when the outer tube attachment portion 2 is contracted, and is a so-called long member. It functions as a height adjustment tool (a length adjustment rod in the present embodiment in which the lower side portion 3B is cylindrical). Therefore, the inner pipe fitting 3 does not have to be composed of two or three or more members as in this embodiment, and may be composed of one member. However, there are other devices, piping, and the like below the upper support 4, and work may be limited. Therefore, if it comprises a member separable in the up-and-down direction like this form, attachment of inner pipe fitting 3 will become easy.

  The lower side portion 3B of the inner tube fitting 3 can be manufactured separately, but is similar to the unit inner tube constituting the first inner tube 102 and the second inner tube 202 constituting the second double tube 200. It is preferable to use the body. In this embodiment, the lower side portion 3B of the inner pipe fitting 3 is a leading conduit of the inner pipe.

  When the attachment of the lower side portion 3B is completed, as shown in FIG. 20 (1), the holder 7 is attached to the lower side portion 2B of the outer pipe fitting 2 of the present embodiment at or near the excavation position. The holder 7 is a member that constitutes the contact portion 6a of the lower support 6 described above.

  The holder 7 is, for example, in a cylindrical shape, and the lower portion 2B of the outer tube fitting 2 is positioned in the hollow portion. For example, if the holder 7 can be divided and is configured to connect the divided portions after surrounding the lower portion 2B of the outer tube fitting 2, the attachment becomes easy.

  As shown in (2) of FIG. 20, the outer pipe fitting 2 to which the holder 7 is attached is placed on the outer pipe casing pedestal 51 and brought upright.

  Then, as shown in FIG. 21, the upper support 4 is moved upward, and the outer pipe fitting 2 and the outer pipe casing mount 51 to which the holder 7 is attached are installed below the support machine 1.

  When this installation is completed, as shown in FIG. 22, the upper support 4 is moved downward to connect the upper support 4 and the outer tube fitting 2.

  As described above, the existing outer pipe fitting 82 and the existing inner pipe fitting 83 of the existing apparatus (supporting machine 1 having different members) are respectively connected to the outer pipe fitting 2 and the inner pipe fitting 3 of this embodiment. Thus, the support machine 1 of this embodiment is constructed. This is because existing excavation work that does not require the addition of the second double pipe 200 and excavation work that requires the addition of the second double pipe 200 are performed using the same excavator 90. It is a device to make the best use of the device. However, even in excavation work where it is not necessary to add the second double pipe 200, the support machine 1 provided with the outer pipe fitting 2 and the inner pipe fitting 3 of this embodiment can be used. The above replacement work can be omitted.

Next, a method for placing (temporarily placing) the second double pipe 200 will be described.
In addition, although this temporary placement can also be performed using the support machine 1 from which a part of member differs, below, the case where it performs using the support machine 1 of this form is demonstrated to an example.

  In this embodiment, as shown in FIG. 23, the second double pipe 200 is supported using the support machine 1 at the deposit position. As shown in FIG. 4, the second double pipe 200 has an outer pipe 201 and an inner pipe 202, and the outer pipe 201 is attached to the outer pipe fitting 2 and the inner pipe 202 is attached to the inner pipe fitting 3. It has been.

  In order to facilitate the embedding of the second double pipe 200 at the front end portion of the second double pipe 200 or to prevent intrusion of earth and sand or the like into the second double pipe 200, the front end A tool 203 is attached. The tip tool 203 is provided with a drill bit or the like as necessary. In addition, since the embedding of the second double pipe 200 is not intended for ground improvement, drilling or the like, a stirring blade or the like is not provided.

  The second double pipe 200 is vertically supported at the deposit position and is embedded in the ground G as shown in FIG. For this embedding, for example, the second double pipe 200 is rotated around the axis by the support machine 1.

  When the embedding of the second double pipe 200 is completed, as shown in FIG. 25, the fixing pin P of the outer pipe 201 is detached and the outer pipe fitting 2 provided in the support machine 1 is contracted. As a result, the outer tube 201 is removed from the outer tube fitting 2 of the support machine 1.

  Next, as shown in FIG. 26, the position fastener C is attached to the inner tube 202, the fixing pin P of the inner tube 202 is detached, and the upper support 4 provided in the support machine 1 is moved upward. Thereby, the inner pipe 202 is removed from the inner pipe fitting 3 of the support machine 1.

  Here, the position fastener C is a jig for preventing the inner tube 202 from dropping downward with respect to the outer tube 201. Therefore, if the inner pipe 202 does not drop, this attachment can be omitted.

  Next, a method of collecting the second double pipe 200 temporarily placed as described above before adding it to the first double pipe 100 will be described. In addition, although the above temporary placement can be performed prior to excavation by the first double pipe 100 or after excavation by the first double pipe 100, it is common sense to use the first double pipe 100. Prior to drilling. If it is performed after excavation by the first double pipe 100, it is not necessary to embed it in the ground G, and it becomes a meaningless work.

  In collecting the second double pipe 200, as shown in FIG. 27, first, the support machine 1 is moved to the deposit position and positioned above the second double pipe 200.

  Next, as shown in FIG. 28, the support machine 1 is moved downward, and the inner pipe 202 of the second double pipe 200 is attached to the lower pipe fitting 3 of the support machine 1. This attachment is performed by inserting a fixing pin P or the like. Since this attachment can be performed while observing the inner tube 202, it is extremely easy.

  Next, as shown in FIG. 29, the position fastener C attached to the inner tube 202 is removed. Even if this removal is performed, since the inner tube 202 is already attached to the inner tube fitting 3, there is no possibility that the inner tube 202 falls.

  When the position fastener C is removed, as shown in FIG. 30, the outer pipe fitting 2 is extended, the fixing pin P is inserted into the outer pipe 201, and the outer pipe 201 is attached to the outer pipe fitting 2.

  Then, as shown in FIG. 31, the second double pipe 200 is pulled out from the ground G by moving the support machine 1 upward or the like. At the time of this drawing, the second double pipe 200 may or may not be rotated around the axis.

  The pulled second double pipe 200 may be immediately moved to the excavation position, but as shown in FIG. 32, the fixing pin P of the tip tool 203 is detached near the deposit position, and the second double pipe 200 is removed. The tip tool 203 may be removed from the head.

  Next, a method of adding the second double pipe 200 (second node) pulled out as described above to the first double pipe 100 (first node) will be described.

  As shown in FIG. 33, the extracted second double pipe 200 moves to the excavation position while being supported by the support machine 1 and is positioned above the first double pipe 100.

  Next, the support machine 1 is moved downward, and the inner pipe 102 of the first double pipe 100 and the inner pipe 202 of the second double pipe 200 are added. At the time of this addition, although not specifically shown, a fixing pin or the like is inserted.

  Next, as shown in FIG. 35, when the position fastener C is attached to the inner tube 102 of the first double pipe 100, the position fastener C is removed.

  Then, although not shown in particular, the outer pipe fitting 2 is extended to add the outer pipe 101 of the first double pipe 100 and the outer pipe 201 of the second double pipe 200 as shown in FIG. For this extension, a fixing pin or the like is inserted.

  In this way, the second double pipe 200 is added to the upper side of the first double pipe 100. After that, the excavation work may be advanced by moving the support machine 1 downward. If the excavation depth becomes deeper, the unit double pipes may be sequentially added to the third and fourth sections in the same manner as described above.

  INDUSTRIAL APPLICABILITY The present invention is applicable as a multi-tube support machine, an extension facility, an extension method, and an extension method.

DESCRIPTION OF SYMBOLS 1 Multi-tube support machine 2 Outer tube fitting 2A Upper part 2B Lower part 2X Protrusion 3 Inner pipe attachment 4 Upper support 5 Stretching tool 6 Lower support 6a Abutting part 7 Holding tool 82 Existing outer pipe Attachment 83 Existing inner pipe attachment 90 Excavator 91 Leader 92 Backstay 93 Wire 95 Base machine 100 First double pipe 101 First outer pipe 102 First inner pipe
103 Excavation Head 104 Agitation Blade 200 Second Double Pipe 201 Second Outer Pipe 202 Second Inner Pipe
203 Tip C Position Lock P Fixing Pin

Claims (5)

A multi-tube support machine,
An outer tube fitting that can be expanded and contracted in the extending direction of the multiple tubes;
An inner tube fitting in which the end on the multiple tube side is exposed in a contracted state of the outer tube fitting;
An upper support that is movable in the direction of extension of the multiple tubes that rotates about the outer tube fitting and the inner tube fitting;
A multi-tube support machine comprising: A telescopic tool is attached to the upper support,
This stretcher is also attached to the outer tube fitting,
The mounting structure for the outer tube fitting is a structure in which the outer tube fitting can rotate about its axis with respect to the telescopic tool and cannot move in the extending direction of the multiple tubes.
The outer tube fitting is configured to expand and contract in conjunction with expansion and contraction of the expansion and contraction tool.
The multi-tube support machine according to claim 1. A support machine according to claim 1 or 2,
The multiple tube as the first multiple tube, and a tip tool attached to the distal end portion of the second multiple tube added to the first multiple tube,
The second multiple tube has an outer tube and an inner tube;
A position fastener that makes it impossible for the inner tube of the second multiple tube to move in the extending direction relative to the outer tube of the second multiple tube;
Multi-tube extension facility characterized by that. A first outer pipe comprising a single unit outer pipe or a plurality of unit outer pipes connected in the axial direction to the outer pipe fitting provided in the support machine according to claim 1 or 2. The first inner pipe consisting of one unit inner pipe or the plurality of unit inner pipes connected in the axial direction is attached to the inner pipe fitting provided in the support machine. If
Remove the outer tube fitting and the unit outer tube, or connect the unit outer tubes adjacent to each other,
Shrink the outer tube fitting provided in the support machine to expose the attachment portion between the inner tube fitting and the unit inner tube, or the addition portion between the unit inner tubes adjacent to each other,
In the exposed portion, the inner pipe fitting and the unit inner pipe are removed, or unit inner pipes adjacent to each other are spliced together.
A method for connecting multiple pipes, characterized in that The removal method according to claim 4, wherein in the excavation position, the outer pipe fitting and the unit outer pipe are removed, or the outer pipes adjacent to each other are joined together,
Further, the inner pipe fitting and the unit inner pipe are removed, or unit inner pipes adjacent to each other are connected to each other,
On the other hand, in a position other than the excavation position, the second multiple pipe provided with the outer pipe and the inner pipe is embedded in the ground,
Move the support machine to the embedded position of the second multi-pipe,
Attaching the inner pipe fitting provided in the support machine and the inner pipe of the second multiple pipe, or adding the unit inner pipe provided in the support machine and the inner pipe of the second multiple pipe,
Elongate the outer tube fitting provided in the support machine,
Attaching the outer pipe fitting provided in the support machine and the outer pipe of the second multiple pipe, or adding the unit outer pipe provided in the support machine and the outer pipe of the second multiple pipe,
While shrinking the outer pipe fitting provided in the support machine, the support machine is moved to the excavation position,
Adding the inner tube of the second multiple tube and the unit inner tube of the first multiple tube;
Elongate the outer tube fitting provided in the support machine,
Adding an outer tube of the second multiple tube and a unit outer tube of the first multiple tube;
A method of adding multiple pipes characterized by the above.

Images