JP2001234535A - Surface casing pulling apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surface casing pulling apparatus which can stably and surely pull a surface casing by means of small hydraulic jacks irrespective of the diameter of the surface casing. SOLUTION: The surface casing pulling apparatus is comprised of a beam 1, two hydraulic jack mounting stands 2, the hydraulic jacks 4, two brackets 3, and hooking pins 6. The beam 1 is suspended over an upper end of the surface casing K. The hydraulic jack mounting stands 2 are slidably supported by the beam 1 to hang respective externally-extending plates 21 which hook hooking plates K1, respectively. The hooking plates K1 are protruded on an external surface of the surface casing K. The hydraulic jacks 4 are attached to a lower portion of each hydraulic jack mounting stand 2. The brackets 3 are slidably supported by the beam 1 in a manner being pinched by the two hydraulic jack mounting stands 2, and hang respective internally-extending plates 31 extending along an internal surface of the surface casing K. The hooking pins 6 are each inserted through the internally-extending plate 31, the surface casing K1 and the externally-extending plate 21, to hook the same together.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pull-out device for a surface casing, and more particularly, to a pull-out device for a surface casing that can be stably and reliably pulled out with a small hydraulic jack regardless of the diameter of the surface casing. It concerns the device.

[0002]

2. Description of the Related Art Conventionally, in the earth drilling method, the reverse method and the like, when excavating a ground by an excavator, in order to prevent collapse of the ground near the surface of the ground to be excavated, before excavation, the ground is excavated by a drilling hole. A short surface casing having a large diameter of about 200 mm is installed, and after excavation or predetermined construction work, the surface casing is pulled out from the ground and collected.

[0003] This surface casing is usually pulled out using a winch of a working machine such as a crane. However, it is necessary to pull out the surface casing against the contact resistance between the surface casing and the ground. A large force is required. Particularly, in the case of a large-diameter surface layer casing, there is a danger that a small work machine may fall over, and thus a special large work machine is required.

To cope with this problem, there has been proposed an apparatus for pulling out a surface casing using a hydraulic jack for obtaining a reaction force from the ground surface (see Japanese Patent Application Laid-Open No. H11-100844). As shown in FIG. 7, the drawing device for the surface casing includes two hydraulic jacks J, which are independently disposed at positions facing each other outside the surface casing K.
A hanger body Ha each having a slit space is attached to J, the hanger body Ha is hung on a bracket B protruding from the outer surface of the surface casing K, and the surface casing K is pulled out by extending the hydraulic jack J. It was made.

[0005]

By the way, this surface casing pulling-out device has an advantage that the surface casing can be pulled out by using a small hydraulic jack that obtains a reaction force from the ground surface, but two hydraulic jacks are used. J, J
Are arranged alone, there is a problem that the installation state of the hydraulic jacks J, J is likely to be unstable, and the surface casing K cannot always be pulled out stably and reliably. Further, since the hanger body Ha and the surface casing K are locked only by hanging the hanger body Ha on the bracket B protruding from the outer surface of the surface casing K, the hanger body Ha and the bracket There is a problem that there is a risk that the lock with B may be released.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the problems of the conventional surface casing pulling-out apparatus, and has a small hydraulic jack which can stably and reliably pull out the surface casing regardless of the diameter of the surface casing. It is an object to provide a drawing device.

[0007]

In order to achieve the above object, a surface casing pulling device of the present invention includes a beam suspended at an upper end of a surface casing, a beam slidably supported by the beam, and an outer portion of the surface casing. Two hydraulic jack mounting bases with hanging external attachment plates for hanging a locking plate protruding from the side surface, a hydraulic jack mounted at a lower portion of the hydraulic jack mounting base, and slidably supported by the beam. And two hooks provided with an inner plate attached vertically to the inner surface of the surface casing, and a locking pin that is hooked through the inner plate, the surface casing and the outer plate. .

[0008] In this pull-out device for a surface casing, the outer side surface and the inner side surface of the surface layer casing are provided by an external attachment plate suspended from a hydraulic jack mounting base slidably supported by a beam and an internal attachment plate suspended from a bracket. By pinching,
A hook plate protruding from the outer surface of the surface casing is hooked by an external attachment plate hanging down from the hydraulic jack mounting base, and further, the hook pin penetrates the inner attachment plate, the surface casing and the external attachment plate, and is hooked. With the beam and the surface casing integrated, the surface casing is pulled out by extending the hydraulic jack attached to the lower part of the hydraulic jack mount with the beam and the surface casing integrated.

In this case, the beam may be provided with a wire fastener which can be lifted by a crane.

Thus, the surface casing can be more reliably pulled out by using both the pulling force of the hydraulic jack and the pulling force of lifting the beam with a crane.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a drawing device for a surface casing according to the present invention.

FIG. 1 to FIG. 6 show an embodiment of a drawing device for a surface casing according to the present invention. The pull-out device for the surface casing includes a beam 1 suspended from the upper end of the surface casing K, and an outer plate that is slidably supported by the beam 1 and locks a latch plate K1 protruding from the outer surface of the surface casing K. Two hydraulic jack mounting bases 2 having a base plate 21 suspended therefrom, and a hydraulic jack 4 mounted below the hydraulic jack mounting base 2
And slidably supported by the beam 1 so as to be sandwiched between the two hydraulic jack mounts 2.
Two brackets 3 having an inner attachment plate 31 attached to the inner side surface of the bracket 3, the inner attachment plate 31, the surface casing K1, and the outer attachment plate 21
And a hooked pin 6 with a flange which is hooked therethrough.

The beam 1 suspended at the upper end of the surface casing K is suspended at the upper end of the surface casing in accordance with the large-diameter surface casing to be extracted so that the beam 1 can be used regardless of the diameter of the surface casing K. For example, it is formed in a column shape so as to have a strength capable of withstanding a load at the time of pulling out the surface layer casing K, and if necessary, further has a reinforcing plate 11 extending along the internal longitudinal direction. To be installed.

The beam 1 is provided at both ends of the beam 1.
In order that the hydraulic jack mounting base 2 and the bracket 3 which are slidably inserted into the beam 1 do not come out of the beam 1, the stopper plates 12, 12 may be bolted, for example, so that the upper end thereof protrudes from the upper surface of the beam 1. At the center of the beam 1, a wire fastener 13 used to lift the beam 1 by a crane is formed.

As shown in detail in FIG. 4, the hydraulic jack mounting base 2 is slidably fitted on the beam 1. Therefore, the main body 20 of the hydraulic jack mounting base 2 is
To form a box shape with both ends opened according to the cross-sectional shape of. An external attachment plate 21 is vertically provided on the main body portion 20, and a reinforcing plate 22 for reinforcing the external addition plate 21 is connected to the back surface of the external addition plate 21 and the bottom plate of the main body portion 20. Weld. In addition, a hook pin through-hole 2H is formed in the center of the external additive plate 21 and the lower edge thereof is bent so that L
When a hook portion 21F having a U-shape is formed and disposed along the hook plate K1 protruding from the outer surface of the surface casing K,
The lower end of the hook plate K1 can be hooked by the hook portion 21F. In this case, the hook pin through-hole 2H of the external attachment plate 21 is formed at a position that matches the hook pin through-hole H formed in the surface casing K and the hook plate K1. Further, the main body 20 of the hydraulic jack mounting base 2 includes:
For example, a screw hole is engraved on the top plate of the main body 20, and a fixing tool, for example, a bolt 2B is screwed into the screw hole, and a hydraulic jack is attached to the beam 1 at a position corresponding to the diameter of the surface casing K. The table 2 can be fixed so as not to move.

The hydraulic jack 4 is mounted on the lower portion of the hydraulic jack mounting base 2, specifically, on the bottom plate of the main body 20 of the hydraulic jack mounting base 2 so that the rod 41 side faces downward. Then, the lower end of the rod 41 is directly grounded to the ground surface on the outer peripheral portion of the surface casing K so as to obtain a reaction force from the ground surface, and if necessary, the base plate P is further placed on the ground surface, and further, In accordance with the stroke required for pulling out the surface casing K, the grounding is performed via a connecting base 5 as shown in FIG.

The adder 5 is formed in a box shape so as to sufficiently bear the load, and a handle portion 51 is provided so as to be easily inserted and pulled out of the rod 41 below. In addition, a plurality of types of the additional bases 5 having different heights are prepared for the additional base 5, and an appropriate height can be selected. Further, the additional bases 5 can be stacked and used as needed. .

The bracket 3 is, as shown in detail in FIG.
Like the hydraulic jack mount 2, it is slidably fitted to the beam 1.
Is formed in a box shape with both ends opened according to the cross-sectional shape of the beam 1. Then, an internal attachment plate 31 is vertically provided on the main body 30, and a reinforcing plate 32 for reinforcing the internal addition plate 31 is connected to the back surface of the internal addition plate 31 and the bottom plate of the main body 30. Weld. In addition, a hooking pin through hole 3H is formed at the center of the internal additive plate 31. In this case, the retaining pin through-hole 3H of the internal attachment plate 31 is formed by the retaining pin through-hole H formed in the surface casing K and the retaining plate K1.
The hole is to be drilled at a position that matches. Furthermore, in the main body 30 of the bracket 3, for example, a screw hole is formed in the top plate of the main body 30, and a fixing tool, for example, a bolt 3 </ b> B is screwed into the screw hole to adjust the diameter of the surface casing K At the corresponding position, the bracket 3 can be fixed to the beam 1 so as not to move.

Next, the operation of the drawing device for the surface casing will be described. At the upper end of the surface casing K,
The beam 1 is suspended so as to pass through the center of the surface casing K, and the two hydraulic jack mounts 2 and the two brackets 3 slidably supported by the beam 1 are moved to drop on the hydraulic jack mount 2. External attachment plate 21 and bracket 3 provided
The outer attachment plate 21 vertically attached to the hydraulic jack mounting base 2 is sandwiched between the inner and outer surfaces of the surface casing K at a symmetrical position passing through the center of the surface casing K by the internal attachment plate 31 suspended vertically. The lower end of the hook plate K1 protruding from the outer surface of the surface casing K is hooked by the hook portion 21F. In addition, the retaining pin 6 was used to penetrate the retaining pin through hole 3H drilled in the internal attachment plate 31, the retaining pin through hole H drilled in the surface casing K and the latch plate K1, and to the external attachment plate 21. The beam 1 and the surface casing K are integrated by penetrating the retaining pin through hole 2H and retaining the beam. In addition, the locking pin 6 is formed in a flanged shape to prevent falling off, and if necessary,
Preferably, a split pin is attached. Then, by tightening the bolts 2B and 3B, the hydraulic jack mount 2 and the bracket 3 are fixed to the beam 1 so as not to move.

In this state, hydraulic oil is supplied from a hydraulic pump (not shown) to the hydraulic jack 4 attached to the lower portion of the hydraulic jack mounting base 2 so that the hydraulic jack 4
To obtain the reaction force from the ground surface,
To pull out. Thereby, the surface casing K
Irrespective of the diameter of the beam, the beam 1
The surface casing K integrated with the above can be stably and reliably pulled out by the two hydraulic jacks 4 and 4 linked by the beam 1.

If the surface casing K cannot be pulled out by one stroke of the hydraulic jack 4, the hydraulic jack 4 is slightly contracted, the extension base 5 is inserted into the lower end of the rod 41 of the hydraulic jack 4, and again, By supplying hydraulic oil to the hydraulic jack 4 from a hydraulic pump,
The hydraulic jack 4 is extended, a reaction force is obtained from the ground surface, and the surface casing K is pulled out. Hereinafter, by repeating this operation, the edge between the surface casing K and the ground is cut, the contact resistance is reduced, a wire is wound on the wire fastener 13 provided for the beam 1, and the beam 1 is lifted by a crane. The casing K can be pulled out while being integrated with the beam 1.

In this case, a hydraulic oil is supplied to the hydraulic jack 4 from a hydraulic pump (not shown), so that the hydraulic jack 4 is extended and a wire is hooked on the wire fastener 13 provided on the beam 1 so as to extend the beam. By lifting 1 with a crane, it is possible to pull out the surface casing K by using both the pulling force of the hydraulic jack 4 and the shocking pulling force of lifting the beam 1 with a crane.

[0023]

According to the drawing device of the present invention, the outer casing attached to the hydraulic jack mounting base slidably supported by the beam and the inner attached board suspended to the bracket are used to form the outer casing. By holding the outer side surface and the inner side surface, a hook plate protruding from the outer surface of the surface layer casing is hooked by an external attachment plate suspended from the hydraulic jack mounting base,
Furthermore, the hydraulic jack attached to the lower part of the hydraulic jack mounting base is extended while the beam and the surface casing are integrated by penetrating and hooking the inner attachment plate, the surface casing, and the outer attachment plate with the retaining pin. Thereby, the surface casing is pulled out. Thereby, regardless of the diameter of the surface casing, the beam and the surface casing can be reliably integrated, and the surface casing can be stably and reliably pulled out with a small hydraulic jack.

Further, by providing the beam with a wire fastener which can be lifted by the crane, the pulling force by the hydraulic jack and the pulling force by lifting the beam by the crane are used together to more reliably form the surface casing. Can be pulled out.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a drawing device for a surface casing of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a cross-sectional view of the main part.

FIG. 4 shows a hydraulic jack mounting base, (A) is a front view,
(B) is a left side view.

5A and 5B show a bracket, wherein FIG. 5A is a front view and FIG. 5B is a right side view.

FIGS. 6A and 6B show the adder, wherein FIG. 6A is a front view and FIG. 6B is a right side view.

FIG. 7 is a front view showing a conventional surface casing pulling-out device.

[Explanation of symbols]

 K Surface casing K1 Hook plate H Hook pin through hole P Base plate 1 Beam 11 Reinforcement plate 12 Stopper plate 13 Wire fastener 2 Hydraulic jack mounting base 20 Main body 21 External attachment plate 21F L-shaped hook 22 Reinforcement plate 2H Hook Pin through hole 3 Bracket 30 Main body 31 Internal attachment plate 3H Hook pin through hole 4 Hydraulic jack 41 Rod 5 Addition stand 6 Hook pin

Claims (2)

[Claims] 1. A beam suspended from an upper end of a surface casing, and an external attachment plate suspended from an outer surface of the surface casing slidably supported by the beam and hanging on an outer surface of the surface casing.
A hydraulic jack mounting base, a hydraulic jack mounted at a lower portion of the hydraulic jack mounting base, and two brackets having a vertical inner mounting plate slidably supported by the beam and attached to the inner surface of the surface casing. And a hook pin that is hooked through the inner attachment plate, the surface casing, and the outer attachment plate. 2. The drawing device for a surface casing according to claim 1, wherein the beam is provided with a wire fastener that can be lifted by a crane.