JPS61261515A - Apparatus and method for rising and falling guide leader in ground improvement machine - Google Patents

Abstract

PURPOSE:To simply secure the rising and falling of a guide leader by a method in which the guide leader is tilted and turned to the direction of rising by controlling the height of its top to low levels and by pulling up its intermediate portion, and is then again restored to the upright position. CONSTITUTION:A ship base 1, a guide leader 2, and a bracket 3 projected from the end of the base 1 are provided, and they are rotatably connected with the basal portion of the leader 2 and a shaft 4. A treating machine 5 is hung down from the side face of the leader 2 by a wire (c) through a sheave pivotally supported on the top of the leader 2. The integrally collected tops 7 of frames 6 of a tripod supporting structure are positioned in the face of the intermediate portion of the leader 2. The long and great guide leader can thus be very simply raised or made to fall down with good efficiency even in regions where heights are limited according to areas, time periods, etc., like air ports and its neighboring areas.

Description

[Detailed description of the invention] g) Purpose of the invention [Industrial application field] The present invention guides construction equipment such as a soft ground stirring and mixing construction machine, a sand pile construction machine, and other pile driving machines. It concerns the handstand technique of upright leaders.

[Conventional technology]

This type of construction machine is equipped with an upright guide leader that guides the construction equipment upward and downward, and the leader is generally attached to the base of the leader.

It is supported at three points on the main body by a stem member whose one end is connected to the middle part or the top part and whose other end is connected to both rear ends of the construction machine main body. At that time, for example, insert a length adjustment mechanism using hydraulic pressure or screws into some of the stem members so that the guide leader can be adjusted to the upright position even if the construction machine body tilts and stops. In some cases, the length of each stem member is adjusted, or when the leader is set at an angle, the length of each stem member is adjusted. but.

In any case, the range of angle adjustment of the guide leader was limited to a small range.

By the way, the height of this type of guide leader must be increased as the depth at which ground improvement work can be carried out increases.

When carrying out construction work from the sea using a construction machine equipped with a guide reader as described above, the height of the construction machine may be restricted due to regulations such as the location and time of construction (for example, near an airport). be.

Furthermore, it is advantageous to keep the height of the guide leader low in order to lower the center of gravity and ensure safety when towing the construction boat.

In addition, in the case of the "surface sludge solidification treatment machine" described in Japanese Patent Publication No. 54-29009, the lower end of the mast (corresponding to a guide leader) is pivotally attached to a bracket protruding from the stern, and the mast and the platform are connected. It has a structure that supports the mast so that it can be raised and lowered by driving a hydraulic jack installed between each kneading blade. The purpose is to determine the overlapping cross-sectional area of the stirring spheres in such a way that it can be stirred most effectively in accordance with the properties of the sludge to be treated.
The following aspects of the present invention have completely different purposes.

[Problem that the invention seeks to solve]

In the former case, the device and method of the present invention make it possible to easily invert and secure the tall guide leader of the construction machine, thereby achieving efficient construction work in areas with height restrictions or regulations. The purpose is to improve stability during movement.

(01 Configuration of the Invention [Means for Solving the Problems]) The apparatus and method of the present invention achieve all of the above objects.

(1) The base end of a guide leader installed vertically on a soil improvement construction machine, etc. is connected to the main body of the construction machine via a rotating shaft, and the base end is sufficiently lower than the height of the guide leader and is installed parallel to the leader. A support stand erected at a distance from the frame and the guide leader was installed on one side of the main body, and a wire controlled by a first winch was pivotally supported at the upper end of the frame. It is wound around a sheave that is pivotally supported in the middle part of the guide leader via the sheave, and its end is connected to the frame body or the guide leader. An inverted device for a guide leader in a ground improvement construction machine, etc., comprising a wire controlled by a second winch connected to the vicinity of the top of the guide leader.

(2) Start the M2 winch and pull the top of the upright guide leader toward the support base.
After the construction equipment is all swung around the base shaft and its center of gravity exceeds the top of the base shaft, the first winch is interlocked to gradually feed out the wire while tilting the guide leader. To keep the height of the top of the guide leader low by winding the wire of two winches and guiding and placing the same leader on the support stand in an inclined state.
Then, the first winch is activated, and the wire pulls up the middle part of the guide leader placed on the support base, causing the leader to rotate in the direction of standing up around the base axis, and in conjunction with this, the second winch A method for inverting a guide leader in a ground improvement construction machine, etc., which consists of a process in which the guide leader is guided and returned to an upright position by gradually letting out a winte wire.

[For production]

At the top of the frame bodies arranged in parallel on both sides of the leader in the direction of the rotation axis of the base end of the guide leader, there are removable bins for connecting the frame body and the intermediate part of the upright guide leader. Normally, the reader is maintained in an upright position by the bottle and the rotating shaft at the proximal end. The pin is remotely controlled by pneumatic or hydraulic actuating mechanism or electrical means, and a limit switch is installed in the opposite position, and when the bottle is fitted into the leader, an indicator lamp indicates the status in all cockpits, control panels, etc. so that it lights up.

The above-mentioned locking means may be used to secure the guide leader on the support stand when a similar mechanism is installed at a required location on the support stand of the guide leader and the leader is folded and rested on the support stand.

Now, after confirming that the bin of the frame that supports the upright guide leader has come off the leader, the second winch is gently driven to wind up the wire, and the wire is used to extend the area near the top of the leader toward the support base. When the wire is pulled, the weight of the guide leader, which holds construction equipment etc. on the opposite side, applies torque to the base rotating shaft in the opposite rotational direction to the direction in which the wire is pulled.
Pulled by the wire, the leader swings around the base rotation axis in the direction of lifting the construction device, and eventually passes the crushing point and tends to roll like a stone toward the support stand due to its own weight. However, as soon as the second winch is driven as described above, a tensile force is applied to the wire of the first winch via the sheave pivotally supported on the frame, and the guide leader attempts to swing toward the support base. to prevent

Therefore, in order to tilt the guide leader onto the support base, it is necessary to slowly unwind the wire of the first winch in conjunction with the drive of the second winch. Rather, while the wire of the first winch is gradually paid out in response to the tensile force based on the transfer torque of the guide leader applied to the wire of the first winch, the second winch is driven in conjunction with this, and the Guide the transfer direction of leaders.

Of the above, one first winch is provided for each frame structure, and the rolling direction of the guide leader deviates depending on how the winch feeds out the wire. It is necessary to mutually operate so that the same → ゛ on the right becomes 1. For example, adjust the amount of movement of each wire using a potentiometer, etc. It's a good idea to adjust the amount of feed by comparing each other while getting to know each other.

Thus, the guide leader is tilted gently until its side eventually rests on the seat of the support platform, loosening the wire of the first winch and winding up the wire of the second winch.

In addition, in this case, the wire for moving the construction device up and down along the guide leader must also be separately hoisted in conjunction with this.

Thereafter, the guide leader is secured to the seat of the support base by the tensile force applied to the wire of the second wiener. The height of the top of the guide leader at this time is approximately equal to the height of the top of the frame. Therefore, the height of the support stand must be sufficiently lower than that of the frame.

That is, the height of the top of the guide leader when it is folded down is the height of the entire construction device, and it must be less than or equal to the regulated height limit.

Through the process described above, the height of the guide leader can be lowered to the bottom relatively easily and in a short period of time when desired. The guide leader can be accurately and reliably secured in the upright position again within a short period of time.

That is, the wire of the first winch, which winds the sheave that is pivoted around the middle part of the guide leader whose weight is applied to the support stand, is wound up 9, and the leader is erected about its base axis by the tensile force of the wire. At the same time, the second winch is operated in conjunction with this to let out the wire. In this case as well, unless the lengths of the first and second hoists of the - group are adjusted mutually, the guide leader will not return to the predetermined upright position and there is a risk of failure such as not being able to set the penetrating bottle. There is.

Also, at the point where the center of gravity of the guide leader passes over the base shaft, tensile force is suddenly applied to the wire of the second winch, so be careful when operating it. In the end, the rotation of the guide leader is controlled by the wire of the second wiener. Of course, in that case, the upper and lower wires of the construction equipment in the guide leader should also be fed out in conjunction with each other.

When the guide leader is in the correct upright position, a pin remotely driven by pneumatic, hydraulic or electromechanical means connects the leader to the top of the structure and provides a support mechanism for the guide leader.

Embodiment FIGS. 1 and 2 show a side view and a front view of an example of a ground improvement construction machine that implements the device and method of the present invention. In the figures, 1 is the platform, 2 is a guide leader, 3
is a bracket protruding from the end of the boat platform 1, and the tip of the bracket and the base of the guide leader 2 are rotatably connected by a shaft 4. 5 is a soil improvement construction machine which is held by the guide leader 2 so as to be able to freely slide upwards and downwards; in this embodiment, it is equipped with an agitation and mixing machine;
The processing machine is suspended from the side of the guide leader 2 by a wire C via a sheave mounted on the top of the guide leader 2. Reference numeral 6 designates frames built on both sides of the leader 2 on the platform 1, each frame consisting of a tripod support structure, the top 7 of which is integrated with the entire set; (See Figures 3 and 4).

3 is an enlarged view of the main part at the top of the arrow in FIG. 2, and FIG. 4 is a cross section taken along the line IV--IV in FIG.
is the guide leader, 6 is the frame, 7 is its top, 8
is a double-acting air cylinder installed at the top 7; 9 is a double-acting air cylinder installed at the top 7;
It is a coupling bin that is slidably supported on the top part 7 and connected to the piston rod of the air cylinder 8 so as to slide back and forth in the left and right direction (as shown in FIG. 3). and f'L are connected to the tops 7 of the pair of frames. In that case, a limit switch is placed on the top 7R side and activated in response to the penetration of the bottle 9, making it possible to blink an indicator lamp provided in the cockpit. The coupling bin 9 can be slid to the left from the state shown in the figure by the operation of the air cylinder 8, and by moving its right end to the left side of the leader 2, the connection between the 11-dar 2 and the frame 6 can be established. is released. A plurality of sheaves A1 are each supported on the top portion 7 by a shaft provided parallel to the rotation shaft 4.

In FIGS. 1 and 4, a bracket is protruded from the intermediate portion facing the frame top 7 of the leader 2, a horizontal axis parallel to the shaft 4 is provided here, and a plurality of sheaves Azt corresponding to the sheave At are provided. A wire a is supported between sheaves A1 and A2.
Wind it up, hang the end of it from sheave A1 onto the ship,
This is connected to the drum of a winch AW installed under the frame body 6.

Thus, by winding up the winch AWt, the guide leader 2 rotates counterclockwise around the shaft 4 in FIG. By gradually drawing out the wire ai to which a tensile force is applied in response to the torque of the guide leader 2, the guide leader 2 can be tilted toward the support metal side q, which will be described later.

Now, on the platform 1, directly below the direction in which the leader 2 will fall,
In addition, it has a tripod or four-legged structure that is installed at a position somewhat distant from the leader 2 and the frame body 6, and its top is an integrated support stand, the length of which is equivalent to the height of the frame body 6. The height of the top of the guide leader 2 is approximately equal to or higher than the height of the top 7 of the frame structure 6, even when the slanted guide leader 2 is placed on the seat 11. It is preferable to design it so that it is also slightly lower.

Of course, the structure of the support stand 10 is solid and can sufficiently withstand even if a guide leader or the like is knocked over with a slight impact, and can also withstand the load of component forces due to their weight. In this case, it is effective to apply a shock-absorbing material such as a spring or rubber to the seat 11 in order to prevent shock from being applied to the guide leader. It is designed so that it is impossible for it to deviate from 11. For that purpose, always
It is necessary to operate the guide leader 2' so that its support is stably pressed against the seat 11 by applying a tensile force to the wire b, which will be described later.

b is a winch B placed near the top of the guide leader 2 and on the platform 1 which is further away from the sabot r' platform 10.
A wire that connects the drum w, and this wire b
are the leaders 2'f in a direction opposite to the direction of the torque generated about the axis 4 due to their weight when the guide leaders 2 are in the upright position.

In addition to acting to rotate the guide leader 2, etc., when the guide leader 2 etc. starts to tilt toward the support base, it guides the inclination direction and correctly supports the middle part of the leader 2.
The function is to seat the seat in a predetermined position.

However, the guide in the inclination direction of the guide leader 2 is the top part 7 of the frame structure 6 and the leader receiver of the support base 10 is the seat 11.
It is also conceivable to provide a guide member that connects the reader 2 to the support seat 11, and guide the side surface of the leader 2 to the support seat 11. Alternatively, the top of one frame and the receiver may be of a one-sided type connecting the seat 11.

The first guide member may be made of a soft material such as steel wire.

Note that the direction of inclination of the guide leader 2 is also influenced by the degree of mutual feeding of the wires A1 and A2 provided on both sides, so that the lengths of the wires a on both sides are always the same. It requires control.

The method of operating the apparatus of this embodiment as described above is not substantially different from that described in the "Operation" section above, so please refer to that section.

According to the device of this embodiment and the method described above, for example, 3
Since the height f of a guide leader from 5m in height can be reduced to a height of 20m, it is possible to efficiently invert the guide leader during ground improvement work in areas with height restrictions and at certain times of day. Many benefits can be expected, such as lowering the center of gravity and enabling stable navigation when moving construction vessels.

(・→Effects) According to the device and method of the present invention, it is possible to invert a long gaitori muda very easily and efficiently, so there are height restrictions depending on the area and time, such as near airports. It is effective for ground improvement work in areas where it is required, and by tilting the guide leader to lower the overall center of gravity and increase stability during movement, it ensures speed when moving. You can expect special effects and effects.

[Brief explanation of drawings]

Fig. 1 is a side view of an embodiment of a construction ship equipped with the device of the present invention, Fig. 2 is a front view thereof, and Fig. 3 is an enlarged view of the main part indicated by the arrow ■ in Fig. 2. Figure 4 shows IV-IV in Figure 1.
It is a figure showing a line-view cut plane. 1... Ship platform, 7... Top, 2... Guide leader, 10... Support stand, 3... Bracket, 11... Support is seat, 4... Support shaft,
AW...first winch, 5...agitation mixing machine, A
I, A2...Sheave, 6...Frame structure, B
w...Second winch a1 b, c...Wire,

Claims (1)

[Claims] 1. The base end of a guide leader installed vertically on a soil improvement construction machine, etc. is connected to the construction machine body via a rotating shaft, and the base end is sufficiently lower than the height of the guide leader, and A frame body installed in parallel with the leader and a support stand erected at a distance from the guide leader are installed on one side of the main body, respectively, and a wire controlled by a first winch is connected to the frame body. It is wound around a sheave that is pivoted at the middle part of the guide leader through a sheave that is pivoted at the upper end, and its end is connected to the frame body or guide leader, while the sheave is placed further away from the leader than the support base. An inverted device for a guide leader in a ground improvement construction machine, etc., comprising a wire controlled by a second winch arranged on the main body connected near the top of the guide leader. 2. Activate the second winch and pull the top of the upright guide leader toward the support base, swing the guide leader, construction equipment, etc. around the base shaft until the center of gravity exceeds the top of the base shaft. The first winch is interlocked with the first winch to gradually let out the wire while tilting the guide leader, winding the wire of the second winch and guiding the leader onto the support table in the tilted state; to keep the height of the top of the guide leader low;
Then, the first winch is activated, and the wire pulls up the middle part of the guide leader placed on the support platform, and the leader is rotated in the direction of standing up around the base axis, and in conjunction with this, the second winch is activated. A method for inverting a guide leader in a soil improvement construction machine, etc., which consists of a process in which the guide leader is guided and returned to an upright position by gradually letting out a wire.