JP3683238B2 - Vertical shaft construction machine and its width reduction method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shaft construction machine that rotates and press-fits a steel pipe or the like and a method for reducing the width thereof.
[0002]
[Prior art]
Conventionally, many shaft construction machines that rotate steel pipes and press-fit into a predetermined position are used. The shaft construction machine includes a base having an opening for penetrating steel pipes, a plurality of lifting means standing on the upper surface of the base, a frame that is a non-rotating part that is lifted and lowered by the lifting means, and the frame An annular body that is supported so as to be able to move up and down integrally, and to be rotatable about an axis that passes through the opening and is parallel to the lifting direction of the frame body, and is formed so as to be bendable. A C-shaped band for fastening the supported steel pipes and a rotation drive unit that is supported by the frame and rotates the annular body are provided.
[0003]
In order to construct the shaft, it is necessary to transport the shaft construction machine from the storage location to the construction location by means of transportation such as a truck. When a general road is used for transporting the equipment, the current road traffic law requires that the width of the transported material be within 3200 mm, and the diameter of the steel pipe or the like is 2500 mm or less when trying to match the outer shape of the shaft construction machine. However, in recent years, the diameter of the steel pipe to be used has increased, and there are cases in which a diameter exceeding 2500 mm is required.
[0004]
FIG. 9 is a plan view of a conventional steel pipe press-fitting and drawing apparatus.
As shown in FIG. 9, for example, a steel pipe press-fitting / extracting device 70 described in Japanese Patent Laid-Open No. 2001-073731 includes an upper frame 71 and a lower frame 72 that vertically penetrate a steel pipe, and are relatively moved up and down by a hydraulic cylinder 74. It is provided as possible. A rotating body 73 that penetrates the steel pipes is disposed on the upper frame 71.
[0005]
The upper and lower frames 71 and 72 are formed in a U-shape and are arranged to be opposed to each other, and both ends of the lower frame pieces 75 and 76 are connected by connecting members 77 and 78, respectively, so that the upper and lower frames are rectangular. It is formed in a frame shape. In the rotating body 73, arcuate gear pieces 79 and 80 having a central angle smaller than 180 degrees are arranged to face each other with a gap. The arcuate gear pieces 79 and 80 mesh with the gears 81a and 81b respectively provided on both sides of the small gear 81 that is provided on each of the pair of two upper frame pieces 75 and rotates synchronously. Yes.
[0006]
The distance L2 between the meshing portions of the gear 81a and the gear 81b with respect to the arcuate gear pieces 79, 80 is formed wider than the interval L1 of the arcuate gear pieces 79, 80 during rotation. 80 is configured to always mesh with one of the gear 81a and the gear 81b.
[0007]
The steel pipe press-fitting / pulling-out device 70 can fix a plurality of C-shaped bands (not shown) fixed to the arcuate gear pieces 79 and 80 to the outer periphery of the steel pipe (not shown) and rotate together with the steel pipe. it can. In addition, the upper and lower frames 71 and 72 and the rotating body 73 can be reduced in the width direction to reduce the width during transportation.
[0008]
[Problems to be solved by the invention]
However, since the conventional steel pipe press-fitting and drawing device 70 abuts both end portions of the arcuate gear pieces 79 and 80 when the width is reduced, if the reduction width is increased, the arcuate gear pieces 79 and 80 Naturally, the length is shortened, and the interval L1 between the arcuate gear pieces 79 and 80 during rotation is increased. If the distance L1 is longer than the distance L2, the gear 81a and the gear 81b are not engaged with the arcuate gear pieces 79 and 80, and the driving force is not transmitted, so that the steel pipe cannot be rotated. For this reason, the width at the time of reduction does not become very small.
[0009]
Further, when changing the width, a device for moving the upper and lower frame pieces 75, 76 to the side is required outside, and if the connecting members 77, 78 are constituted by a hydraulic cylinder or the like, the weight increases.
[0010]
Accordingly, the problem to be solved by the present invention is to provide a shaft construction machine capable of reducing the width at the time of reduction and a width reduction method that can be easily reduced using a lightweight mechanism.
[0011]
[Means for Solving the Problems]
In order to solve the above problems, the shaft construction machine of the present invention has a base frame having an opening that can penetrate the cylindrical member, and an opening that is provided in the base frame and can penetrate the cylindrical member. A shaft construction machine comprising a gripping mechanism that supports the cylindrical member so as to be movable up and down, and the base frame and the gripping mechanism are divided into two divided base frames and divided parts, and both the divided bases The frames are connected by hinges provided at both ends.
[0012]
Both split base frames can be rotated about the hinge axis, rotate about 180 degrees, and are folded in half. The divided part of the gripping mechanism divided into two is folded together with both divided base frames, and the shaft construction machine has a half width as a whole.
[0013]
The gripping mechanism includes an elevating means, an inner ring fixed to the elevating means so as to be movable up and down, an outer ring rotatably provided on the inner ring, a rotation driving device that rotates the outer ring, and a fixed to the outer ring. It is preferable that a fastening member for fastening the cylindrical member is provided, and each of the inner ring, the outer ring, and the fastening member is divided into two.
As an inner ring | wheel and an outer ring | wheel, what divided into 2 the bearing which provided the rolling member between them can be used, for example.
[0014]
When the cylindrical member is fixed to the fastening member and the rotation driving device is driven, the cylindrical member rotates through the outer ring and the fastening member. The ground is excavated by the lower end of the cylindrical member. At this time, the outer ring is supported by the inner ring, and the shift of the center position is prevented.
[0015]
Further, when the elevating means is operated, the cylindrical member is raised and lowered via the inner ring, the outer ring, and the fastening member. After the ground member is excavated by the rotation of the cylindrical member, the lifting / lowering means is lowered, and after the lifting / lowering means moves to the lower end position, the fastening member is loosened and the upper position of the cylindrical member is fastened again. This is repeated to embed the cylindrical member in the ground.
[0016]
It is preferable that a hook member is provided on each of the hinges, and winches are provided in at least one place on both sides of the dividing line.
After hanging the rope from the hanging member placed above the hook member, hanging the rope from the winch to the hanging member and lifting the shaft construction machine, the both ends of the base frame are centered on the hinge by pulling the rope from the winch Rotate and fold. And the vertical shaft construction machine can be mounted on conveyance means, such as a truck, as it is.
[0017]
The method for reducing the width of a shaft construction machine according to the present invention includes a base frame having an opening that can penetrate a cylindrical member, a bearing that is provided in the base frame and rotatably supports the cylindrical member, and the cylinder. A gripping mechanism having lifting means for supporting the shape member so as to be lifted and lowered, and the base frame and the bearing of the gripping mechanism are divided into two split base frames and split bearings, and both the splits A method for reducing the width of a shaft construction machine in which base frames are connected by hinges provided at both ends of the shaft, wherein engagement members are provided on both hinges, and winches are provided at at least one place on both sides of the dividing line. by manipulating Te, and both the hinge of the vertical shaft construction machine, and a one by one place on both sides of the division line hung respectively, under hanging One by one place on both sides of the dividing line of the vertical shaft construction machine is state is lowered relative the hinge.
[0018]
When the hinge is lifted while the shaft construction machine is suspended, or when one part on each side of the dividing line is lowered, the ends of the divided base frame and the divided bearing are separated from each other, and the ends are moved upward. Folded to face.
Since the hinge is used, the mechanism becomes simple, and the folding work can be done when it is suspended while being loaded onto the transport means after the work is completed, so it can be easily reduced without using a special external device. can do.
Further, the split bearing has a large number of rolling elements between the inner ring and the outer ring, but since the divided end portions face upward, the rolling elements do not spill out during folding.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
FIG. 1 is a plan view of a shaft construction machine of the present invention, FIG. 2 is a front sectional view of the shaft construction machine, and FIG. 3 is a side sectional view of the shaft construction machine.
[0020]
As shown in FIGS. 1-3, the shaft construction machine 1 of this invention is the base frame 3 which has the circular opening part which can penetrate the steel pipe 2 (refer FIG. 6) which is an example of a cylindrical member, and this base. A gripping mechanism 4 is provided that is provided in the frame 3 and has a circular opening that can penetrate the steel pipe 2 and supports the steel pipe 2 so as to be movable up and down.
The base frame 3 is a plate-like member whose outer shape is rectangular, and the opening is formed at the center. The divided base frames 5 and 6 are formed in a semicircular shape by dividing the opening into two parts, and the lower surfaces of both end portions that are in contact with each other are connected by hinges 13 and 14.
[0021]
The gripping mechanism 4 includes hydraulic lifting cylinders 7 which are examples of lifting means provided at the four corners of the base frame 3, an inner ring 9 fixed to the lifting cylinders 7 via a lifting frame 8, and the inner ring 9. The outer ring 10 is rotatably provided, a hydraulic motor 11 which is an example of a rotation drive device that rotates the outer ring 10, and a fastening member 12 that is fixed to the outer ring 10 and fastens the steel pipe 2. The gripping mechanism 4 is divided into two parts to form two divided parts.
[0022]
The lifting frame 8 is formed in the same shape as the base frame 3 and is divided along the dividing line of the base frame 3 to form divided lifting frames 15 and 16.
The inner ring 9 and the outer ring 10 are formed so as to be relatively rotatable via a large number of spheres 17 therebetween. A bearing 18 is constituted by the inner ring 9, the outer ring 10 and the spherical body 17, and the inner side of the inner ring 9 of the bearing 18 serves as an opening of the gripping mechanism 4. Further, the inner ring 9 and the outer ring 10 fixed to the elevating frame 8 are divided into two along the dividing line of the elevating frame 8 to form divided inner rings 9a and 9b and divided outer rings 10a and 10b.
[0023]
The upper surface of the inner ring 9 is fixed to the lifting frame 8, and the outer ring 10 can rotate around the inner ring 9.
The fastening member 12 is formed in an annular shape, and is attached to the lower part of the outer ring 10 by connecting and fixing about ¼ of the entire circumference and separating the remaining ¾. A part of the fastening member 12 is provided with a fastening cylinder 19 whose length can be adjusted. By moving the rod of the fastening cylinder 19 forward and backward, the steel pipe 2 fitted inside can be fastened and loosened.
The fastening member 12 is divided along the dividing line of the base frame 3 and the lifting frame 8.
[0024]
FIG. 4 is a partial side sectional view of the shaft construction machine of the present invention.
As shown in FIGS. 1 and 4, rectangular holes 22 and 23 having a predetermined depth are formed on the upper surface of the divided elevating frame 15 and in the vicinity of the portion in contact with the divided elevating frame 16. And the side wall of the rectangular holes 22 and 23 and the edge part of the division | segmentation raising / lowering frame 16 are fastened and fixed with the volt | bolt 20 so that attachment or detachment is possible. In addition, the connection part (not shown) of the division | segmentation base frames 5 and 6 is also fixed with the same structure.
[0025]
One set of positioning blocks 24 and 25 is provided below the both end portions of each of the split outer rings 10a and 10b and between the fastening members 12. The positioning block 24 is provided with a pin protruding laterally, and the positioning block 25 that is paired with the pin is formed with a hole portion into which the pin can be fitted. When the shaft construction machine 1 is used, the two ends of the split outer rings 10a and 10b can be reliably aligned by inserting the pins and the holes of the two pairs of positioning blocks 24 and 25 that form a pair.
[0026]
As shown in FIG. 4, rectangular holes 36 and 37 are formed in the lower portions of the divided outer ring 10 a and the side portions of the positioning blocks 24 and 25 provided at both ends of the divided outer ring 10 a, respectively. And the side wall of the division | segmentation outer ring | wheel 10b and the rectangular hole 37, and the positioning blocks 24 and 25 used as a pair are fastened and fixed by the bolt 20, respectively.
As shown in FIG. 3, the inner ring 9 is fastened and fixed to the lifting frame 8, and the positioning blocks 24 and 25 are fastened to the outer ring 10 by bolts 20.
[0027]
FIG. 5 is a plan sectional view of the shaft construction machine of the present invention.
External teeth 26 are formed on the outer periphery of the outer ring 10 over the entire periphery, and four small gears 27 that mesh with the external teeth 26 are provided at the lower portion of the lifting frame 8. The small gear 27 receives the driving force from the hydraulic motor 11 and rotates the outer ring 10 via the external teeth 26.
[0028]
As shown in FIGS. 1 to 3, the central shafts 28 and 29 of the hinges 13 and 14 protrude outward from the outer periphery of the base frame 3, and a hooking member 30 having a circular hole is provided at the protruding portion. Yes.
In addition, winches 31 and 32 are provided at both ends of the lifting frame 8 in the direction perpendicular to the dividing line through the center of the opening. The winches 31 and 32 are connected to a part of a hydraulic supply line (not shown) of the shaft construction machine 1 and are controlled by a control device (not shown) of the shaft construction machine 1.
[0029]
FIG. 6 is a front sectional view showing a use state of the shaft construction machine of the present invention, and FIG. 7 is a plan view showing a use state of the shaft construction machine.
As shown in FIGS. 6 and 7, the shaft construction machine 1 is used in a state in which the base frame 3 is connected to a heavy machine 33 in which an excavation bucket 34 is provided at the tip of an arm.
When the shaft construction machine 1 is used, the divided base frames 5 and 6, the divided outer rings 10 a and 10 b, the divided lifting frames 15 and 16, and the fastening member 12 are fastened and fixed using bolts 20 and nuts 21.
In this state, the steel pipe 2 is fixed using the fastening cylinder 19 of the fastening member 12, and the steel pipe 2 is rotated via the outer ring 10 and the fastening member 12 by transmitting the driving force to the small gear 27 using the rotation driving means. Let Moreover, the raising / lowering cylinder 7 is lowered | hung and the steel pipe 2 is lowered | hung. By repeating this, the steel pipe 2 is press-fitted into the ground, and the earth and sand in the steel pipe 2 is removed by the excavation bucket 34 of the heavy machine 33. In this way, a shaft is constructed.
[0030]
Next, the width reduction method of the shaft construction machine of this invention is demonstrated.
8 (A) to 8 (C) are explanatory views showing the procedure of the width reduction method of the shaft construction machine of the present invention.
When the shaft construction machine 1 is reduced in width, first, the outer ring 10 is rotated and the dividing lines of the divided outer rings 10a and 10b are aligned with the dividing lines of the divided inner rings 9a and 9b, and then the divided base frames 5 and 6 are divided. The bolts 20 and nuts 21 that fix the outer rings 10a and 10b, the divided elevating frames 15 and 16, and the fastening member 12 are removed.
[0031]
Next, as shown in FIG. 8A, the two portions of the rectangular frame 35 and the engaging members 30 of the hinges 13 and 14 are connected by a rope 38. Further, the ropes 39 are fed out from the winches 31 and 32 and connected to the rectangular frame 35.
And the rectangular frame 35 is lifted using lifting devices, such as a crane, and the shaft construction machine 1 is suspended.
[0032]
Next, as shown in FIG. 8 (B), the winches 31 and 32 are operated, the rope 39 is further extended, and the portions of the divided base frames 5 and 6 where the winches 31 and 32 are provided are lowered.
Then, as shown in FIG. 8C, after the rope 39 is unwound from the winches 31 and 32 until the back surfaces of the divided base frames 5 and 6 come into contact with each other, the shaft construction machine 1 is placed on a conveying means such as a truck. And remove the ropes 38 and 39.
After this, a protective plate is attached to the dividing surface of the bearing 18. Since the dividing surface of the bearing 18 faces upward, the sphere 17 does not spill during the work.
In this state, since the width of the shaft construction machine 1 is half that in use, the shaft construction machine 1 can be transported in a very compact state.
[0033]
【The invention's effect】
The present invention has the following effects.
(1) In the shaft construction machine according to the present invention, the base frame and the gripping mechanism are each divided into two, and both divided base frames are connected by hinges provided at both ends, so that the divided base frame is sandwiched between the hinges. Can be folded, and the width at the time of reduction can be reduced.
(2) When hook members are provided on both hinges and winches are provided at least one place on both sides of the dividing line, the shaft construction machine is folded by operating the winch while the shaft construction machine is suspended. Can be expanded.
(3) The width reduction method of the shaft construction machine according to the present invention is such that both hinges of the shaft construction machine and one place on each side of the dividing line are suspended, and one place on each side of the dividing line is suspended from the hinge. Since it is relatively lowered, a lightweight mechanism can be used without using heavy objects such as a hydraulic cylinder, and it can be folded while being suspended when loaded onto the conveying means, so it can be easily reduced in width. .
Furthermore, since the end of the split bearing is folded so as to face upward, the rolling elements do not spill out during folding.
[Brief description of the drawings]
FIG. 1 is a plan view of a shaft construction machine according to the present invention.
FIG. 2 is a front sectional view of the vertical shaft construction machine.
FIG. 3 is a side sectional view of the vertical shaft construction machine.
FIG. 4 is a partial side sectional view of the vertical shaft construction machine.
FIG. 5 is a plan sectional view of the vertical shaft construction machine.
FIG. 6 is a front sectional view showing a usage state of the vertical shaft construction machine.
FIG. 7 is a plan view showing a usage state of the vertical shaft construction machine.
FIGS. 8A to 8C are explanatory diagrams illustrating a procedure of a method for reducing the width of the vertical shaft construction machine. FIGS.
FIG. 9 is a plan view of a conventional steel pipe press-fitting and drawing apparatus.
[Explanation of symbols]
1 Vertical shaft construction machine 2 Steel pipe (cylindrical member)
3 Base frame 4 Grip mechanism 5, 6 Split base frame 7 Elevating cylinder (elevating means)
8 Lifting frame 9 Inner ring 9a, 9b Divided inner ring 10 Outer ring 10a, 10b Divided outer ring 11 Hydraulic motor (rotary drive device)
12 Fastening members 13, 14 Hinge 15, 16 Split lifting frame 17 Sphere 18 Bearing 19 Tightening cylinder 20 Bolt 21 Nut 22, 23 Rectangular hole 24, 25 Positioning block 26 External gear 27 Small gear 28, 29 Center shaft 30 Engagement member 31 , 32 Winch 33 Heavy machine 34 Excavation bucket 35 Rectangular frame 36, 37 Rectangular hole 38, 39 Rope

Claims (3)

A base frame having an opening that can penetrate the cylindrical member, and a gripping mechanism that is provided in the base frame and has an opening that can penetrate the cylindrical member, and supports the cylindrical member so that the cylindrical member can be moved up and down and rotated. In the shaft construction machine equipped with
The base frame and the gripping mechanism are divided into two divided base frames and divided parts,
Both split base frames are connected by hinges provided at both ends ,
A shaft construction machine characterized in that a hooking member is provided on each of the hinges, and winches are provided in at least one place on both sides of the dividing line .   The gripping mechanism includes an elevating unit provided on the base frame, an inner ring fixed to the elevating unit so as to be movable up and down, an outer ring provided rotatably on the inner ring, and a rotation driving device that rotates the outer ring. The shaft construction machine according to claim 1, further comprising a fastening member fixed to the outer ring and fastening the cylindrical member, wherein the inner ring, the outer ring, and the fastening member are each divided into two. A base frame having an opening capable of penetrating the cylindrical member; a bearing provided on the base frame for rotatably supporting the cylindrical member; and an elevating means for supporting the cylindrical member to be movable up and down. A hinge having a gripping mechanism, wherein the base frame and the bearing of the gripping mechanism are divided into two split base frames and split bearings, and the split base frames are provided at both ends of the split base frame. A method for reducing the width of a shaft construction machine connected by
Both the hinges are provided with engagement members, and each winch is operated at least at one location on both sides of the dividing line, so that both the hinges of the shaft construction machine and one location on both sides of the dividing line are respectively connected. A method for reducing the width of a shaft construction machine, wherein the shaft construction machine is lowered and lowered one by one on both sides of the dividing line of the shaft construction machine in a suspended state relative to the hinge.

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