JP2001329776A - Installation device for shaft excavator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve installation workability by easily carrying out shaft excavator installation work in a short time in an installation device for a shaft excavator and to improve the stability of the excavator during shaft excavation work. SOLUTION: Shaft excavator planking 21 laid on the ground G and having a through hole 22 larger in diameter than a casing tube S, is provided with guide members 25, 26 having circular guide parts 27, 28, and guide arms 31, 32 having circular guide parts 35, 36. Each earth plate 14 is seated and supported on the excavator planking 21 by the circular guide parts 27, 28, 35, 36 so that a guide part 12a of a baseplate 12 is swingable with respect to the axis of the casing tube S but radially immobile.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft excavator installation device for installing a shaft excavator such as an all-casing excavator used for excavation of a shaft or construction of a foundation pile on a predetermined excavation ground.

[0002]

2. Description of the Related Art An all-casing excavator is used, for example, when excavating a shaft, and clamps a casing tube and pushes the casing tube into the ground while turning or swinging the casing tube to lower the lower end thereof. The ground is cut by a cutter bit, and a crane is operated to excavate and discharge the earth and sand in the casing tube by a grab bucket to form a shaft.

In such an all-casing excavator,
The casing tube supported by the all-casing excavator must be installed so that the center of rotation of the casing tube coincides with the center of excavation on the ground. However, when the all-casing excavator is installed on the ground, the all-casing excavator is lowered from a state of being hung by a crane, and the all-casing excavator is installed at a predetermined excavation position by a visual inspection of an operator. There is a problem that positioning cannot be performed.

[0004] To solve such a problem, for example, there is one disclosed in Japanese Patent Publication No. Hei 5-18969. The “pile core setting method of casing driver” disclosed in this publication discloses a casing driver in which a hole larger than the outer diameter of the casing and four guide plates for positioning the legs (float) are fixed around the hole. Using a positioning iron plate of a size that can be mounted, first place this iron plate on the ground with a dowel so that the center of the excavation of the ground and the center of the hole match, and then suspend the casing driver. The leg is lowered and lowered and positioned and fixed on the positioning iron plate so that the leg coincides with the guide plate.

[0005]

According to the above-mentioned conventional method of setting the pile core of the casing driver, when the casing driver is positioned on the positioning iron plate, each leg portion is aligned with each guide plate. So that the casing driver is lowered so as not to move back and forth and left and right. For this reason, the casing driver must be lowered while adjusting the position in the front-rear direction, the left-right direction, and the turning direction with respect to the horizontal plane, and there is a problem that the positioning operation is troublesome and the operation time is long.

When the casing driver is mounted on the positioning iron plate, the casing driver is fixed by the guide plate so as not to move back and forth and left and right. Therefore, when the casing driver holds the casing tube and pushes it into the ground while turning to cut the ground, the excavation reaction force (turning reaction force) is transmitted from the casing driver to the positioning iron plate via the guide plate. Is transmitted from the positioning iron plate to the ground and received. At this time, since the positioning iron plate is fixed to the ground by a plurality of piles, the pile is displaced by the excavation reaction force (turning reaction force), and the ground is damaged, and the installation stability of the casing driver is insufficient. There is a possibility that it becomes.

SUMMARY OF THE INVENTION The present invention solves such a problem. The installation work of the shaft excavator can be performed easily and in a short time to improve the installation workability. It is an object of the present invention to provide a shaft excavator installation device with improved stability.

[0008]

According to a first aspect of the present invention, there is provided a shaft excavator installation apparatus having a through hole having a diameter larger than that of a casing tube and laying on the ground. And a shaft excavator mounted on the shaft excavator so that the shaft excavator is mounted on the shaft excavator so as to be freely rotatable with respect to the axis of the casing tube and cannot be moved in the radial direction. A guide jig for installation and support and fixing means for positioning and fixing the guide jig at a predetermined position are provided.

In the installation apparatus for a shaft excavator according to a second aspect of the present invention, the guide jig is positioned on both sides of the shaft plate for the shaft excavator, and has an inner circumferential arc concentric with the axis of the casing tube. A pair of guide members having a guide portion, wherein the pair of inner circumferential arc guide portions support an outer circumferential portion of a base plate of the shaft excavator.

According to a third aspect of the present invention, there is provided a shaft excavator setting apparatus, wherein a pair of guide arms having an arc guide portion connected to the pair of inner peripheral arc guide portions is pivoted on the shaft excavator bottom plate. The guide arm is freely supported, and a tip portion projects outward from the shaft excavator base plate to support an outer peripheral portion of the base plate of the shaft excavator; It is characterized in that it can be positioned at a storage position to be stored in the inside.

According to a fourth aspect of the present invention, in the installation apparatus for a shaft excavator, the guide jig is a guide ring fixed to the floor plate for the shaft excavator and concentric with an axis of the casing tube, An inner peripheral portion of the guide ring supports an outer peripheral portion of a base plate of the shaft excavator.

Further, in the installation apparatus for a shaft excavator according to the present invention, the guide jig is positioned substantially at the center of the shaft plate for the shaft excavator, and has an outer peripheral arc concentric with the axis of the casing tube. A guide member having a guide portion, wherein the outer circumferential arc guide portion supports a plurality of legs of the shaft excavator.

According to a sixth aspect of the present invention, in the installation apparatus for a shaft excavator, the fixing means is a fixing bolt for fixing the guide jig to the floor plate for the shaft excavator.

According to a seventh aspect of the present invention, in the installation apparatus for a shaft excavator, the fixing means is a fixing bolt for fixing the guide jig to the ground around the shaft plate for the shaft excavator. .

In the installation apparatus for a shaft excavator according to the invention of claim 8, the fixing means is interposed between the shaft plate for the shaft excavator and the guide jig, and the guide jig is formed by frictional force. It is a rubber plate for positioning and fixing the tool.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a plan view of an installation apparatus of a shaft excavator according to a first embodiment of the present invention, and FIG. 2 is a plan view of an installation state of an all-casing excavator by the installation apparatus of a shaft excavator of the embodiment. 3 is a cross-sectional view taken along the line III-III of FIG. 2, and FIG. 4 is a plan view illustrating an operation when the all-casing excavator is installed by the installation device of the shaft excavator.

As shown in FIGS. 2 and 3, in an all-casing excavator 11 installed using the installation apparatus for a shaft excavator according to the present embodiment, adjustment cylinders 13 constituting a leveling device are provided at four corners of a base frame 12. A grounding plate 14 constituting a leg is attached to the tip of a drive rod that is mounted and extends downward from each adjustment cylinder 13. A drive unit main body 15 is disposed above the base frame 12. At four corners of the drive unit main body 15, elevating cylinders 16 forming a pull-in / pulling-in device are mounted. It is connected to.
The drive unit body 15 is provided with a turning device 17, and the turning device 17 is provided with a clamp device 18 for clamping the outer periphery of the casing tube S.

In the all-casing excavator 11 of this embodiment, arc-shaped guide portions 12a are formed at four corners of the base plate 12, and each of the guide portions 12a has a radius R from the center of the casing tube S held by the clamp device 18. The circle C of FIG.

Accordingly, the clamping device 18 holds the casing tube S, and the rotating device 17 rotates the casing tube S. In this state, the raising / lowering cylinder 16 is contracted to lower the drive unit main body 15, so that the casing tube S is lowered. S is pushed into the ground from the ground G, the ground is cut by the cutter bit at the lower end, and the excavated earth and sand in the casing tube S is discharged by the excavating bucket by operating the crane to form a shaft.

In the installation apparatus for installing the all-casing excavator 11 configured as described above, as shown in FIGS. 1 to 3, the excavator mandrel 21 for laying the ground G for installing the all-casing excavator 11 is provided. It is a rectangular flat iron plate, a through hole 22 having a larger diameter than the casing tube S is formed in the center, and a plurality of fixing pin holes 23 and 24 through which fixing pins for fixing the excavator floor plate 21 are formed. ing. A pair of left and right guide members 25 and 26 constituting a guide jig are fixed to both sides of the excavator base plate 21 by welding (fixing means).
Similarly to the base plate 12 of the all-casing excavator 11 described above, the inner circumferential arc guide portions 27 and 28 that are in contact with the circle C having the radius R from the center of the through hole 22 are formed in the base plates 5 and 26.

Notches 29 and 30 are formed at the front and rear ends of the guide members 25 and 26, respectively, and guides constituting a guide jig such that the base end engages with the notches 29 and 30 are formed. Arms 31 and 32 are rotatably mounted by support pins 33 and 34. This guide arm 31,
32 is formed with inner arc guide portions 35 and 36,
The tip portion protrudes outward from the excavator sole plate 21, and the inner circumferential arc guide portions 35 and 36 have a radius R from the center of the through hole 22.
1 is rotatable between a support position in contact with the circle C (a solid line position in FIG. 1) and a storage position (a two-dot chain line position in FIG. 1) in which the tip is stored in the excavating board 21. In this case, the guide arms 31 and 32 are positioned at the respective positions by the base end portions abutting on the respective regulating surfaces 29a, 29b, 30a and 30b of the notches 29 and 30. The guide arms 31 and 32 are formed with fixing pin holes 37 and 38 which are aligned with the fixing pin holes 24 of the excavator sole plate 21 and lock both when the guide arms 31 and 32 are rotated to the support position.

In the support position where the guide arms 31 and 32 project outward from the excavator base plate 21 in this manner, the inner circumferential arc guides 35 and 36 are connected to the inner circumferential arc guides 27 and 27 of the respective guide members 25 and 26. Along with the circle 28, it comes into contact with a circle C having a radius R from the center of the through hole 22. Accordingly, the inner arc guides 27, 28 of the guide members 25, 26 and the inner arc guides 35, 36 of the guide arms 31, 32 are provided.
Supports the guide portions 12a of the base plate 12 of the all-casing excavator 11, so that the all-casing excavator 11 can swing about the axis of the casing tube S and can not move in the radial direction. It can be supported on the machine floor plate 21. In addition, hanging pieces 39 and 40 for hanging the entire apparatus such as the excavator floor 21 are fixed to the respective guide members 25 and 26.

In order to install the all-casing excavator 11 using the shaft excavator installation apparatus of the present embodiment thus configured, first, as shown in FIG. 2 and FIG. A hanging jig is connected to each of the hanging pieces 39 and 40, and is lifted by a crane device (not shown) and moved to a predetermined position. Then, it is placed using a positioning jig (not shown) so that the through hole 22 in the excavator floor plate 21 matches the excavation center O previously drawn on the ground G, and a fixing pin (not shown) is passed through the fixing pin hole 23. By driving the guide arms 31 and 32 outward from the storage position to the support position while driving the guide arms 31 and 32 into the ground, and driving the fixing pins into the ground through the matching fixing pin holes 24, 33 and 34, the excavator floor plate is driven. 21 is fixed at a predetermined position on the ground G.

Next, the all-casing excavator 11 is lifted by the crane device, moved above the excavator sole plate 21, held in a suspended state, and then lowered. Then, the base plate 12 in the all-casing excavator 11
Are fitted into the inner arc guides 27, 28 of the guide members 25, 26 and the inner arc guides 35, 36 of the guide arms 31, 32, and the inner arc guides 27, 28. , 35, 36, each ground plate 14 is seated on the excavator sole plate 21. Then, since the center of the through hole 22 on the excavator bottom plate 21 side matches the center of the casing tube S held by the all-casing excavator 11, the center of the casing tube S matches the excavation center on the ground G. The all-casing excavator 11 will be installed.

In this case, the all casing excavator 11
As shown in FIG. 2, the position where the vertical and horizontal directions are substantially parallel to the excavator base plate 21 to be installed is the normal installation position, but the circumferential position of the all-casing excavator 11 in the horizontal plane is the holding casing tube S If the center of the excavator and the center of the through hole 22 on the side of the excavator bottom plate 21 match, each grounding plate 14 may be seated at any position on the excavator bottom plate 21. For example, as shown in FIG. 4, the all-casing excavator 11 may be displaced in the circumferential direction with respect to the excavator sole plate 21, and high-precision positioning is unnecessary.

As described above, in the installation apparatus of the shaft excavator according to the present embodiment, the all-casing excavator 11 suspended by the crane apparatus from the excavator floor plate 21 fixed at a predetermined position on the ground G is used. Descend, base plate 12
Of the guide members 25 and 26 and the inner arc guides 35 and 36 of the guide arms 31 and 32 while being fitted to the inner arc guides 27 and 28 of the guide members 25 and 26. It is arranged to be seated on the floor plate 21 and fixed. Therefore, the center of the all-casing excavator 11 and the excavation center of the ground G can be accurately matched. In this case, high-precision positioning in the circumferential direction of the all-casing excavator 11 is not required, and the installation work can be easily shortened. It can be performed in a short time, and workability can be improved.

Further, since the guide arms 31, 32 for positioning and supporting the all-casing excavator 11 are rotatable, they can be stored in the excavator floor plate 21 at the time of transport, and the transport operation can be easily performed.

When a shaft excavation operation is performed by the all-casing excavator 11 installed on the excavator base plate 21 as described above, the clamp device 18 is lowered while holding and rotating the casing tube S while holding the casing tube S. The tube S is pushed into the ground from the ground G to cut the ground, but the all casing excavator 11 receives the excavation reaction force from the ground. The excavation reaction force is a turning reaction force of the all-casing excavator 11 in a direction opposite to the casing tube S, and the excavation reaction force is received by the weight of the all-casing excavator 11 and peripheral equipment. Even if the excavation reaction force received by the all-casing excavator 11 increases due to the change in the excavating conditions, the all-casing excavator 11 is absorbed by the ground plate 14 slightly turning on the excavator floor 21 and The load transmitted to the floor plate 21 for excavation is small, and the fixing pin of the floor plate 21 for excavator is not displaced by the excavation reaction force (turning reaction force) so that the ground is not damaged, and the all-casing excavator 11 can be stably supported. When the all-casing excavator 11 is displaced to the position shown in FIG. 4 on the excavator base plate 21, the casing tube S is rotated clockwise so that a counterclockwise excavation reaction force acts on the all-casing excavator 11. It is sufficient to excavate the ground by turning around.

FIG. 5 is a plan view of a shaft excavator installation apparatus according to a second embodiment of the present invention, and FIG. 6 is a plan view of a shaft excavator installation apparatus according to a third embodiment of the present invention. Note that members having the same functions as those described in the above-described embodiment are denoted by the same reference numerals, and redundant description will be omitted.

In the apparatus for installing a shaft excavator according to the second embodiment, as shown in FIG. 5, guide members 41, 42, 43, 4 constituting guide jigs at each corner of the excavator floor 21.
4 are fixed, and the guide members 41, 42, 43, 44
The guide arms 31, 32 are rotatably mounted adjacent to the guide members 41, 42, 43, 44, and the inner circumferential arc guide portions 45, 46, 47, 48 are formed on the respective guide members 41, 42, 43, 44. Therefore, it is possible to reduce the weight of the entire excavator sole plate 21 and facilitate the transportation.

In the apparatus for installing a shaft excavator according to the third embodiment, as shown in FIG. 6, a pair of brackets 51 are fixed to each corner of the excavator base plate 21, while the excavator A guide ring 52 constituting a guide jig is placed on the laying plate 21, and mounting pieces 53 fixed at equal intervals on the outer peripheral portion are clamped by brackets 51 and fixed by fixing pins 54. The inner peripheral surface of the ring 52 forms an inner peripheral arc guide portion 55. Therefore, by simplifying the structure of the guide ring 52 for positioning and supporting the all-casing excavator 11, machining workability can be improved.

In each of the above-described embodiments, the outer peripheral side of the shaft excavator is supported by the inner circular arc guide portion of the guide jig, but the present invention is not limited to this supporting method. FIG. 7 is a plan view of an installation device for a shaft excavator according to a fourth embodiment of the present invention, FIG. 8 is a cross section taken along line VIII-VIII of FIG.
10 is a perspective view of an installation device of a shaft excavator according to a fifth embodiment of the present invention, FIG. 10 is a perspective view of an installation device of a shaft excavator according to a sixth embodiment of the present invention, and FIG. Is shown. Note that members having the same functions as those described in the above-described embodiment are denoted by the same reference numerals, and redundant description will be omitted.

In the installation apparatus for a shaft excavator according to the fourth embodiment, as shown in FIGS. 7 and 8, the excavator bottom plate 21 is formed with a through hole 22 at the center, and a suspension piece 61 is formed around the through hole 22. A square hole 62 for leverage is formed while being fixed. A guide member 63 as a guide jig is placed at the center of the excavator base plate 21, and is fixed to the excavator base plate 21 by a pair of holding plates 64 and fixing bolts (fixing means) 65. The guide member 63 has a substantially circular shape, a through hole 66 having a smaller diameter than the through hole 22 is formed in the center, a hanging piece 67 is fixed around the through hole 66, and a lever square hole 68 is formed around the through hole 66. A pair of outer circular arc guide portions 69 and 70 having a radius R from the center of the through holes 22 and 66 are formed on the outer peripheral portion of the guide member 63.

In order to install the all-casing excavator 11 using the shaft excavator installation apparatus of the present embodiment configured as described above, first, the excavator base plate 21 is connected to each of the hanging pieces 61 by a crane device. It is lifted and moved so that the through-hole 22 is placed so as to coincide with the excavation center previously drawn on the ground G, and is fixed to the ground by a fixing pin (not shown). Next, the guide member 63 is lifted and moved by a crane device via each hanging piece 67, and is placed on the excavator floor plate 21, and a bar or the like (not shown) is inserted into each of the square holes 62, 68 for leverage to guide the guide. By horizontally moving the member 63, the positioning on the excavator mandrel 21, that is, the through holes 22, 6
6 is fixed to the excavator base plate 21 with the holding plate 64 and the fixing bolt.

Then, the all-casing excavator 11 is lifted by the crane device and moved above the excavator sole plate 21, and is slid down so that the grounding plates 14 are fitted to the outer circumferential arc guide portions 69 and 70 of the guide member 63. While letting
The grounding plate 14 is seated on the excavator sole plate 21. Then, the center of the through hole 22 on the excavator bottom plate 21 side and the casing tube S held by the all-casing excavator 11
, The all casing excavator 11 is installed such that the center of the casing tube S coincides with the excavation center on the ground G.

Therefore, the excavator base plate 21 is mounted and fixed at a predetermined position, and the guide member 63 is mounted and fixed thereon. In this state, the all-casing excavator 11 is lowered, and 14 is lowered so as to fit into the outer circumferential arc guide portions 69 and 70 of the guide member 63, and
By sitting on the top, the center on the side of the all-casing excavator 11 and the center of excavation on the ground G can be accurately matched. In this case, high-precision positioning in the circumferential direction of the all-casing excavator 11 becomes unnecessary, and Work can be easily performed in a short time, and workability can be improved. Also,
Since the excavator sole plate 21 and the guide member 63 are separate members, the weight of the apparatus itself during transport can be reduced, and the transport operation can be easily performed.

In the installation apparatus for a shaft excavator according to the fifth embodiment, as shown in FIG. 9, a guide member 71 as a guide jig is placed at the center of the excavator floor plate 21, and is placed at the center. A through hole 72 having a smaller diameter than the through hole 22 is formed, around which a suspending piece 73 is fixed, and a lever square hole 7 is formed.
4 are formed. A pair of outer circumferential arc guide portions 75 and 76 having a radius R from the center of the through holes 22 and 72 are formed on the outer circumferential portion of the guide member 71. Then, the guide member 71 is fixed to the ground G around the excavator floor 21 by a plurality of spikes (fixing means) 77.

In order to install the all-casing excavator 11 using the shaft excavator installation apparatus of the present embodiment configured as described above, first, the excavator base plate 21 is lifted so that the through-hole 22 is formed on the ground G in advance. It is mounted so as to match the drawn excavation center, and is fixed to the ground by a fixing pin (not shown). Next, the guide member 71 is lifted and moved to be placed on the excavator sole plate 21, and a bar (not shown) or the like (not shown) is inserted into each of the square holes 62 and 74 for leverage so that the guide member 71 is moved to a predetermined position, that is, The holes 22 and 66 are positioned so that the centers thereof match each other, and the spike 77 is fixed by penetrating through the fixing hole of the guide member 71 and penetrating into the surrounding ground G. Then, in the same manner as described above, each ground plate 14 of the all-casing excavator 11 is connected to the outer circumferential arc guide portion 74
75 so that the center of the casing tube S is ground G
The all-casing excavator 11 is installed so as to coincide with the upper excavation center.

Accordingly, the excavator sole plate 21 and the guide member 7
1 and a spike 7
7, the apparatus itself is reduced in weight during transportation, so that the transport operation can be easily performed, and the excavator floor 21 and the guide member 71 are fixed. Therefore, the manufacturing cost can be reduced.

In the installation apparatus for a shaft excavator according to the sixth embodiment, as shown in FIGS.
A rubber plate (fixing means) 80 for non-slip
A guide member 81 as a guide jig is placed on the anti-slip rubber plate 80, a through-hole 82 smaller in diameter than the through-hole 22 is formed in the center, and a hanging piece 83 is provided around the through-hole 82. Are fixed, and a lever square hole 84 is formed. A pair of outer circular arc guide portions 85 and 86 having a radius R from the center of the through holes 22 and 82 are formed on the outer peripheral portion of the guide member 81.

In order to install the all-casing excavator 11 using the shaft excavator installation apparatus of the present embodiment configured as described above, first, the excavator base plate 21 is lifted, and the through-hole 22 is previously formed on the ground G. It is mounted so as to match the drawn excavation center, and is fixed to the ground by a fixing pin (not shown). Next, the guide member 81 is lifted and moved to be held at a position where the guide member 81 is slightly in contact with the excavator floor plate 21 (rubber plate 80), and a bar (not shown) or the like is inserted into each of the lever square holes 62 and 84 to guide the guide. When the member 81 is placed after being positioned at a predetermined position, the guide member 81 is fixed on the excavator floor 21 by the frictional resistance of the rubber plate 80. And, as described above, each grounding plate 1 of the all-casing excavator 11
4 is lowered and seated on the excavator base plate 21 while being fitted to the outer circumferential arc guide portions 84 and 85 of the guide member 81 so that the center of the casing tube S coincides with the excavation center on the ground G. The all casing excavator 11 is installed.

Accordingly, the excavator sole plate 21 and the guide member 8
1 and the rubber plate 80 is fixed on the excavator base plate 21 and the guide member 81 is positioned and fixed by frictional resistance, so that the excavator base plate 21 and the guide member 81 are fixed.
This eliminates the need for a process for fixing the guide member 81, thereby reducing the manufacturing cost, and also facilitates the positioning and fixing work of the guide member 81.

In each of the above embodiments, the guide portion 1 of the base plate 12 of the all-casing excavator 11 is used.
2a and the ground plate 14 are positioned by the guide member,
However, the invention is not limited thereto, and another member of the all-casing excavator 11 or a separate guide member may be provided.

[0045]

As described above in detail in the embodiment, according to the installation apparatus for a shaft excavator according to the first aspect of the present invention, the shaft having a through hole larger in diameter than the casing tube and laid on the ground. A guide jig for mounting and supporting the shaft excavator on the shaft for the shaft excavator is mounted and fixed on the surface of the shaft for the excavator so that the shaft can be freely rotated with respect to the axis of the casing tube and cannot be moved in the radial direction. Since the guide jig is positioned and fixed at a predetermined position by means, the shaft excavator can be easily and accurately positioned and installed on the shaft plate for the shaft excavator, and the height of the shaft excavator in the circumferential direction can be increased. Accurate positioning is not required, and the installation work can be improved by performing the installation work easily and in a short time. In addition, the shaft excavator is mounted on the excavator base plate against the excavation reaction force acting during the shaft excavation. so Since the rocks are absorbed by the turning movement, the excavator reaction force transmitted to the excavator slab is reduced to prevent ground damage, thereby improving the stability of the excavator during shaft excavation work. it can.

According to the installation apparatus for a shaft excavator according to the second aspect of the present invention, the guide jig is positioned on both sides of the shaft plate for the shaft excavator, and the inner circumferential arc guide portion is concentric with the axis of the casing tube. And a pair of guide members having an inner peripheral arc guide portion that supports the outer peripheral portion of the base plate of the shaft excavator, so that the guide jig can be easily attached and the shaft excavator is firmly mounted. Can be positioned and supported.

According to the installation apparatus for a shaft excavator according to the third aspect of the present invention, a pair of guide arms having an arc guide portion connected to each inner circumferential arc guide portion is rotatably provided on a shaft plate for a shaft excavator. A support position for supporting and supporting the guide arm such that the distal end projects outward from the shaft plate for the shaft excavator to support the outer peripheral portion of the base plate of the shaft excavator, and a housing for storing the guide arm in the shaft plate for the shaft excavator. The position of the excavator can be positioned and supported by a guide jig in a large area, and the transport operation can be easily performed by storing the guide arm in the excavator floor during transport. Can be.

Further, according to the installation apparatus of the shaft excavator of the invention of claim 4, the guide jig is fixed to the shaft plate for the shaft excavator and is formed as a guide ring concentric with the axis of the casing tube. Since the outer peripheral surface of the shaft supports the outer peripheral portion of the base plate of the shaft excavator, the structure can be simplified by using the guide jig as a guide ring.

According to the installation apparatus for a shaft excavator according to the fifth aspect of the present invention, the guide jig is positioned substantially at the center of the shaft plate for the shaft excavator, and the outer peripheral arc guide concentric with the axis of the casing tube. The guide member has a portion, and the outer circumferential arc guide portion supports the plurality of legs of the shaft excavator. Therefore, the guide jig can be easily mounted, and the shaft excavator can be firmly and easily mounted. Can be positioned and supported.

According to the installation apparatus for a shaft excavator according to the invention of claim 6, the fixing means is a fixing bolt for fixing the guide jig to the shaft plate for the shaft excavator. It can be mounted in advance on the floorboard, and workability can be improved.

According to the apparatus for installing a shaft excavator of the invention of claim 7, the fixing means is a fixing bolt for fixing the guide jig to the ground around the shaft plate for the shaft excavator. By fixing to the ground instead of the shaft for the shaft excavator, it is not necessary to position the shaft for the shaft excavator, and the workability can be improved.

Further, according to the installation apparatus of the shaft excavator of the invention of claim 8, the fixing means is interposed between the shaft plate for the shaft excavator and the guide jig, and the guide jig is formed by frictional force. Since the rubber plate is used for positioning and fixing, fixing bolts and the like are not required, and the workability of installing the shaft plate for the shaft excavator and the guide jig can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view of an installation device of a shaft excavator according to a first embodiment of the present invention.

FIG. 2 is a plan view showing an installation state of the all-casing excavator by the installation apparatus of the shaft excavator according to the embodiment.

FIG. 3 is a sectional view taken along the line III-III of FIG. 2;

FIG. 4 is a plan view showing an operation when the all-casing excavator is installed by the installation device of the shaft excavator.

FIG. 5 is a plan view of an installation device for a shaft excavator according to a second embodiment of the present invention.

FIG. 6 is a plan view of a shaft excavator installation apparatus according to a third embodiment of the present invention.

FIG. 7 is a plan view of an installation device for a shaft excavator according to a fourth embodiment of the present invention.

FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 7;

FIG. 9 is a perspective view of an installation device of a shaft excavator according to a fifth embodiment of the present invention.

FIG. 10 is a perspective view of an installation device of a shaft excavator according to a sixth embodiment of the present invention.

11 is a sectional view taken along line XI-XI of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 All casing excavator (vertical shaft excavator) 12 Base plate 14 Grounding plate 21 Excavator bottom plate 22 Through hole 25, 26 Guide member (guide jig) 27, 28 Inner circumference circular arc guide part 31, 32 Guide arm (guide jig) 35, 36 Inner circumference guide 41, 42, 43, 44 Guide member (guide jig) 45, 46, 47, 48 Inner circumference guide 51 Bracket 52 Guide ring (guide jig) 55 Inner circumference guide 63 Guide member (guide jig) 69, 70 Outer circular arc guide portion 71 Guide member (guide jig) 75, 76 Outer circular arc guide portion 77 Spike (fixing means) 80 Rubber plate for non-slip (fixing means) 81 Guide member (Guide jig) 85, 86 Outer arc guide S Casing tube G Ground

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Kunihiko Hori 1-1-1 Wadazakicho, Hyogo-ku, Kobe-shi, Hyogo F-term in MHI Underground Construction Equipment Engineering (reference) 2D029 DC01 PA07 PA07 PB05 PC01 PD04 2D050 CB23 EE02

Claims (8)

[Claims] 1. A shaft plate for a shaft excavator laid on the ground with a through hole having a diameter larger than that of a casing tube, and a shaft mounted on the shaft plate for the shaft shaft excavator and positioned with respect to an axis of the casing tube. A guide jig for supporting the shaft excavator on the shaft plate for the shaft excavator so as to be rotatable and immovable in the radial direction, and fixing means for positioning and fixing the guide jig at a predetermined position. An installation device for a shaft excavator, comprising: 2. The installation apparatus for a shaft shaft excavator according to claim 1, wherein the guide jigs are positioned on both sides of the shaft plate for the shaft shaft excavator, and are concentric with the axis of the casing tube. An installation device for a shaft excavator, comprising: a pair of guide members having a portion, wherein the pair of inner circumferential arc guide portions support an outer peripheral portion of a base plate of the shaft excavator. 3. A shaft excavator installation apparatus according to claim 2, wherein a pair of guide arms having an arc guide portion connected to said pair of inner circumferential arc guide portions is rotatable on said shaft shaft excavator bottom plate. The guide arm has a tip end projecting outward from the shaft excavator base plate to support an outer peripheral portion of the base plate of the shaft excavator, and a tip end in the shaft excavator base plate. An installation device for a shaft excavator, which can be positioned at a storage position to be stored in a shaft. 4. The installation apparatus for a shaft excavator according to claim 1, wherein the guide jig is a guide ring fixed to the shaft plate for the shaft excavator and concentric with an axis of the casing tube. An installation device for a shaft excavator, wherein an inner peripheral portion of the guide ring supports an outer peripheral portion of a base plate of the shaft excavator. 5. The shaft excavator installation apparatus according to claim 1, wherein the guide jig is positioned at a substantially central portion of the shaft plate for the shaft excavator, and has an outer peripheral arc guide concentric with the axis of the casing tube. A guide member having a portion, wherein the outer circumferential arc guide portion supports a plurality of legs of the shaft shaft excavator, wherein the installation device for a shaft shaft excavator is provided. 6. The shaft excavator installation apparatus according to claim 1, wherein the fixing means is a fixing bolt for fixing the guide jig to the shaft excavator bottom plate. Installation equipment. 7. The shaft excavator installation apparatus according to claim 1, wherein the fixing means is a fixing bolt for fixing the guide jig to a ground around a shaft plate for the shaft excavator. Excavator installation equipment. 8. The installation device for a shaft excavator according to claim 1, wherein the fixing means is interposed between the shaft plate for the shaft excavator and the guide jig, and the guide jig is formed by frictional force. A shaft plate for positioning and fixing the shaft.