JPS61102990A - Lift apparatus of machine for doundation construction - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a foundation construction machine in which a lifting member such as an auger machine or a pile press-in machine is attached to a leader vertically supported by a crane vehicle or the like so as to be able to rise and fall. This invention relates to a lifting device.

(Prior art and its problems) Conventional elevating members such as arch augers and pile press-in machines do not match the expected maximum elevating stroke, regardless of the length of the elevating stroke required of the elevating member for each work site. It is constructed using a long leader. Therefore, depending on the work site, it may be necessary to use an elevating member equipped with an unnecessarily long leader, which may impede movement within the work site.

(Means for Solving the Problems) The present invention has been made to solve the above-mentioned problems of the conventional art. The two-stage leader unit is configured to be extendable and retractable, and the upper-level leader unit supports an elevating member so as to be able to rise and fall, and the endless rotating body is wound from the lower end of the lower-level leader unit to the upper end of the upper-level leader unit, and from the lower end of the lower-level leader unit to the upper end of the upper-level leader unit, and It is hung via a guide wheel so as to pass through the lower end of the single leader and the upper end of the single lower leader, and the winding from the lower end of the lower leader to the upper end of the single upper leader is an endless loop. The lifting member and the winding link connect the endless rotating body in a linear path of the moving body, and the winding can forcibly drive the endless rotating body in any forward or reverse direction,
The present invention is provided with a driving means that can be maintained in a locked state when not driven.

(Function) According to the elevating device according to the present invention described above, from a state where the upper leader alone is at the lower limit position relative to the lower leader alone, and the elevating member is at the lower limit position relative to the upper leader alone, When the winding rotates the endless rotating body so that the linear path portion of the endless rotating body rises, the elevating member is lifted up and moved upward relative to the upper leader alone. When the elevating member reaches the upper limit position, the endless rotating body lifts the upper leader unit relative to the lower leader unit, so that the elevating member continues to touch the ground as the upper leader unit moves upward. Move up.

Therefore, the leader has the shortest length when the upper leader alone is at the lower limit position, and has the longest length when the upper leader alone is at the upper limit position.

When the leader has a required length that is greater than or equal to the shortest length and less than or equal to the maximum length, the elevating member is always located at the upper end position of the leader. In this state, when the endless rotating body is rotated in the opposite direction, the upper leader alone is allowed to descend due to gravity, and the lowering of the upper leader causes the lifting member to move downward relative to the ground. do. After the upper leader alone reaches the lowering limit position, only the lifting member is lowered by the endless rotating body with respect to the upper leader alone, and is subsequently moved downward relative to the ground.

When the elevating member moves downward relative to the ground, an auger main body set on the elevating member performs an excavating action as in the conventional art.

(Embodiment) An embodiment of the present invention will be described below with reference to the attached illustrative drawings, taking an earth auger as an example.

1 to 3, 1 is a leader configured to be extendable and retractable from a lower leader unit 2 and an upper leader unit 3; 4 is an auger machine supported by the upper leader unit 3 of the leader 1 so as to be movable up and down; 5 is the leader 1
This vehicle vertically supports a lower leader unit 2 via an arm 6 and a boom 7.

The lower leader unit 2 is made of a square pipe material with a rectangular cross section, and the upper leader unit 3 is an inner square pipe member with a rectangular cross section inserted into the lower leader unit 2 from the upper end opening 2a. 8 and an outer square pipe material 9 having a rectangular cross-section, which is placed at a position sandwiching the front wall 2b of the lower leader unit 2 between the square pipe material 8, and a connecting member 10 at the upper end of each. It is made by combining and integrating. Reference numeral 11 denotes a pair of left and right guide rails attached to the front wall 2 of the lower leader unit 2, and a slider 12 that engages with the guide rails 11 is provided on the outer square pipe material 9 of the upper leader unit 3. There is. A pair of left and right guide rails 13 are also attached to the outer corner pipe material 9 of the upper leader unit 3, and the auger machine 4 is connected to the upper leader unit 3 via a slider 14 that engages with the guide rails 13. It is supported so that it can be raised and lowered. Note that although guide rollers are omitted in the drawings, guide rollers can be used as necessary to smoothly raise and lower the upper leader unit 3 and the auger machine 4. In addition, stoppers or equivalent parts that restrict the lifting and lowering of the upper leader 3 relative to the lower leader 2 and the auger machine 4 relative to the upper leader 3 within a certain range are, of course, located at appropriate locations. It is provided.

15 is an endless rotation rope. The endless rotation rope 15 is connected to a guide sheep 16 which is pivotally supported at the lower end of the lower leader unit 2.
, a guide sheave 17 pivotally supported at the upper end of the upper leader unit 3, a guide sheave 18 pivotally supported at the lower end of the upper leader unit 3, and a guide sheave 19 pivotally supported at the upper end of the lower leader unit 2. , and a guide sheave 20 pivotally supported by the lower end of the lower leader unit 2, and is suspended so as to rotate along a circulation path returning to the guide sheave 16 at the original position.

The auger machine 4 is connected via an attachment 21 to a linear path portion 15a of the endless rotation cable 15 from the guide sheave 16 to the guide sheave 17. Reference numeral 22 denotes a drive means, which is composed of a motor 23 with a brake and a reducer 24 that cannot transmit reverse torque from the output shaft side to the human power shaft side like a worm reducer. It can be driven in any direction, and when not driven, it can be held in a locked state by the brake provided in the motor 23 and the speed reducer 24.

In addition, the endless surface cable 15 and the guide sheaves 16 to 20 are used.
: I used it, but it's endless rotation... 7yoyu... Care F oil can also be used. In addition, as shown in FIG.
Although the configuration is made up of two series, it may be / series or three or more series.

Next, the method of use and effect will be explained. As shown in FIG.
is at the upper limit position and the auger machine 4 is at the lower limit position with respect to the upper leader unit 3, the drive means 22 drives the guide sheave 20 in the forward rotation direction, and the linear path section 15a moves upward. When the endless rotation cable 15 is rotated in the direction of the rotation, the auger machine 4 is lifted by the endless rotation cable 15, and the auger machine 4 moves upward relative to the upper leader unit 3 which is at the lowering limit position.

As shown in FIG. 5, when the auger machine 4 reaches the upper limit position with respect to the upper leader unit 3,
5 lifts up the upper leader unit 3 via the guide sheave 18. As a result, as shown in FIG. 6, the upper leader unit 3 moves upward relative to the lower leader unit 2, and therefore, the auger machine 4 continues to move upward from the ground. Then, as shown in FIG. 7, when the upper leader unit 3 reaches the upper limit position relative to the lower leader unit 2, the upward stroke of the auger machine 4 ends.

By rotating the endless cable 15 in one direction as described above, the auger machine 4 can be raised from the lower limit position above the ground shown in FIG. 4 to the upper limit position above the ground shown in FIG. Further, as the auger machine 4 moves upward from the ground, the leader 1 can be automatically extended from the shortest length shown in FIGS. 4 and 5 to the longest length shown in FIG. 7.

During actual excavation work, the leader 1 has the shortest length shown in FIG.
The required length corresponding to the excavation depth of The endless surface cable 15 is rotated as described above until it becomes locked, and then the endless surface cable 15 is switched to the locked state. This change in the overall length of the leader 1 can be automatically detected as follows.

That is, for example, as shown by the imaginary line in FIG.
5, a pinion gear 26 that meshes with the lower reader unit 2 is pivotally supported, and the output pulses of a pulse encoder 27 interlocked with this pinion gear 26 are counted by an addition/subtraction counter. Changes in the overall length of the leader 1 can be automatically detected by, for example, detecting the length using a sensor attached to the lower leader unit 2. In addition, if no slip occurs in the elevating drive system, such as when a chain is used instead of the endless surface cable 15, the motor 23 and the sprocket wheel (guide sheave 16 to
20), in which case the position of the auger machine 4 with the reader 1 at its shortest length can be accurately detected.

The shortest length of the leader 1 shown in FIG. When the endless rotation system 15 is switched to the locked state after being extended to the required length corresponding to the excavation depth among the intermediate lengths shown in FIG. It will not go down. Also, even when the length of the leader 1 is longer than the shortest length, the upper leader single unit 3 is replaced by the lower leader single unit 2.
In order to descend by gravity, an endless rotation system is required! Since it is necessary to move the auger machine 4 connected to the upper leader flute body 3 upward, the auger machine 4 is connected to the upper leader whistle body 3.
As long as the upper leader unit 3 is at the upper limit position, the upper leader unit 3 will not descend due to gravity.

After adjusting the leader 1 to the required length and positioning the auger machine 4 at the upper limit position, set the auger body 28 on the auger machine 4, and place the auger body 28 facing the predetermined excavation position. In this state, the auger main body 28 is driven by the auger machine 4, and at the same time, the guide sheave 20 is reversely rotated by the driving means 22.
The endless rotation system 15 is rotated in the opposite direction in which the linear path portion 15a thereof descends.

As a result, the upper stage leader unit 3 descends due to gravity while the auger machine 4 is held at the upper limit position. In addition, in a situation where the single upper leader 3 cannot descend due to gravity,
The endless rotation system 15 will directly pull down the auger machine 4. In either case, the auger machine 4 descends relative to the ground. When the upper leader unit 3 descends due to gravity to the lower limit position relative to the lower leader unit 2, the endless rotation system 15 then pulls down the auger machine 4 held at the upper limit position, and At this point, the auger machine 4 continues to move downward, and the fourth
It is lowered to the lowest position above the ground as shown in the figure. In addition, if the auger machine 4 is first lowered to the lowering limit position relative to the upper leader unit 3, then the endless rotation system 1
5 forcibly pulls down the upper stage leader unit 3, and the auger machine 4 continues to move downward from the ground to the lowest position above the ground as shown in FIG.

The auger main body 28 performs a predetermined excavation action as the auger machine 4 descends from the ground, but when the auger machine 4 is raised from the ground, the linear path section 15 moves up the endless rotation system 15 again. Just rotate it in the direction.

Incidentally, when the leader 1 is used with the shortest length as shown in FIG. 4, the endless rotation system 15 naturally pulls down only the auger machine 4 to the lowest position relative to tth in FIG. 4.

(Effects of the Invention) According to the lifting device for foundation work machines such as earth augers according to the present invention, the leader that supports the lifting member so as to be able to rise and fall as in the above embodiment can be used to raise and lower the lifting member required for each work site. You can adjust the length to match your stroke. In addition, as the elevating member moves downward, the leader is also automatically reduced to its shortest length, thereby eliminating a situation in which the leader protrudes longer than the elevating member. Therefore, movement at the work site can be carried out safely and easily, and the excavation work itself can be carried out stably without vibrations of the long leader.

[Brief explanation of the drawing]

FIG. 1 is an overall side view, FIG. 2 is a vertical sectional side view with a portion of the main part cut away, FIG. 3 is a cross-sectional plan view of the same, and FIGS. 4 to 7 are explanatory views of the operation. 1...Leader, 2...Lower leader alone, 3...
・Upper leader unit, 4... Elevating member (auger machine), IL 13... Guide rail, 12.14
...Slider, 15...Endless rotation system, 16-20
...Guide sheep, 22...Driving means, 23...
Motor with brake, 24...Reducer, 28...
One auger body.

Claims (1)

[Claims] A leader that supports an elevating member such as an auger machine so as to be movable up and down is configured to be extendable and retractable from at least two upper and lower leader units, and the upper leader alone supports the elevating member so that it can be raised and lowered. It is hung from the lower end of the single leader through the upper end of the upper leader, the lower end of the upper leader, and the upper end of the lower leader through a guide wheel, and the lower end of the lower leader is suspended. The elevating member and the endless rotating body are connected through a linear path of the endless rotating body from the end to the upper end of the upper leader unit, and the endless rotating body is forcibly driven in any forward or reverse direction. A lifting device for a foundation construction machine, which is provided with a drive means that can be moved and held in a locked state when not driven.