JPS6327513B2 - - Google Patents

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 on a crane vehicle so as to be able to move up and down. This relates to a lifting device.

(Prior art and its problems) Conventional elevating members such as earth augers and pile press-in machines do not have the ability to meet the expected maximum elevating stroke, regardless of the length of the elevating stroke required of the elevating member at 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 conventional problems, and its feature is that a leader that supports an elevating member so as to be able to rise and fall is at least vertically movable. 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 connected from the lower end of the lower-level leader unit to the upper end of the upper-level leader unit,
The endless loop is hung via a guide wheel so as to pass through the lower end of the upper leader alone and the upper end of the lower leader, and extends from the lower end of the lower leader to the upper end of the upper leader. Driving means that connects the elevating member and the wrapped endless rotating body through a linear path of the rotating body, and is capable of forcibly driving the wrapped endless rotating body in any forward or reverse direction, and is capable of holding the wrapped endless rotating body in a locked state when not driven. The point is that it has been established.

(Function) According to the above-mentioned lifting device according to the present invention, from the state where the upper leader alone is at the lower limit position with respect to the lower leader alone, and the lifting member is at the lower limit position with respect to the upper leader alone, When the endless rotating body is rotated so that the linear path portion of the endless rotating body is raised, the elevating member is lifted and moved upward relative to the upper leader unit. When the elevating member reaches the upper limit position, the endless rotating body lifts the upper leader unit relative to the lower leader unit.
As the upper leader moves upward, the elevating member continues to move upward relative to the ground.

Therefore, the leader has the shortest length when the upper leader alone is at the lower limit position, and 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. When the endless rotating body is rotated in the opposite direction from such a state,
The upper leader alone is allowed to descend due to gravity, and the lowering of the upper leader causes the elevating member to move downward relative to the ground. After the upper leader unit reaches the lower limit position, only the elevating member is lowered with respect to the upper leader unit by the endless rotating body, and the upper leader unit continues to be moved downwardly relative to the ground.

When the elevating member moves downward relative to the ground, the auger 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 using an earth auger as an example, based on the attached illustrative drawings.

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; Reference numeral 5 denotes a vehicle that vertically supports the lower leader unit 2 of the leader 1 via an arm 6 and a boom 7.

The lower leader unit 2 is made of square pipe material with a rectangular cross section, and the upper leader unit 3 is made of
An upper end opening 2a is provided inside the lower reader unit 2.
An inner square pipe material 8 with a rectangular cross-section inserted from the inside and an outside pipe material with a rectangular cross-sectional shape placed in a position where the front wall 2b of the lower leader unit 2 is sandwiched between the square pipe material 8 and the square pipe material 8. A square pipe material 9 is integrally connected with a connecting member 10 at the upper end of each member. Reference numeral 11 denotes a pair of right and left guide rails attached to the front wall 2 of the descending leader unit 2, and a slider 12 that engages with this guide rail 11 is provided on the outer corner pipe material 9 of the upper stage leader unit 3. . Also, a pair of left and right guide rails 13 are attached to the outer corner pipe material 9 of the upper leader unit 3, and the auger machine 4
Slider 14 that engages with this guide rail 13
It is supported by the upper leader unit 3 via the upper leader unit 3 so as to be movable up and down. 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. Also, the raising and lowering of the upper leader unit 3 relative to the lower leader unit 2, and the raising and lowering of the upper leader unit 3
Naturally, a stopper or an equivalent portion for regulating the vertical movement of the auger machine 4 within a certain range is provided at an appropriate location.

15 is an endless rotation rope. The endless rotation rope 15
The guide sheave 16 is pivotally supported at the lower end of the lower leader unit 2, the guide sheave 17 is pivotally supported at the upper end of the upper leader unit 3, and the guide sheave is pivotally supported at the lower end of the upper leader unit 3. 1
8. The circulation path returns to the original position of the guide sheave 16 via the guide sheave 19 pivotally supported at the upper end of the lower leader unit 2 and the guide sheave 20 pivotally supported at the lower end of the lower leader unit 2. It is hung so that it can move. And the endless rotation rope 1
5 said guide sheave 16 to guide sheave 17
The auger machine 4 is connected via an attachment 21 to the straight path section 15a leading to the straight path section 15a. Reference numeral 22 denotes a drive means, which is composed of a motor 23 with a brake and a reducer 24, which cannot transmit torque in the opposite direction from the output shaft side to the input shaft side, like a worm reducer, and drives the guide sheave 20 in the forward and reverse directions. It can be driven in any direction, and when not being driven, the endless rotation cable 15 can be held in a locked state by the brake provided in the motor 23 and the speed reducer 24.

In addition, the endless rotation rope 15 and the guide sheaves 16 to 20
Although an endless rotary chain and a sprocket wheel were used, it is also possible to use an endless rotary chain and a sprocket wheel. In addition, as shown in FIG. 3, an endless rotation rope 15 and a guide sheave 1
6 to 20 are configured in two series, but it is also possible to use one series,
It may be three or more.

Next, the method of use and effect will be explained. Fourth
As shown in the figure, the guide sheave is moved by the drive means 22 from a state where the upper leader unit 3 is at the upper limit position relative to the lower leader unit 2 and the auger machine 4 is at the lower limit position relative to the upper leader unit 3. 20 in the forward rotation direction and the endless rotation cable 15 is rotated in the direction in which the linear path section 15a moves upward, the auger machine 4 is lifted by the endless rotation cable 15 and the upper stage at the lowering limit position is lifted up by the endless rotation cable 15. 4 auger machines for 3 leaders
moves upward.

As shown in FIG. 5, when the auger machine 4 reaches the upper limit position relative to the upper leader unit 3,
The endless rotation cable 15 lifts 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 auger machine 4
The upward stroke of is completed.

By rotating the endless rotation 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 is set at the shortest length shown in Figure 5 (i.e., the shortest length when the auger machine 4 is raised to the upper limit position relative to the upper leader unit 3), or at the shortest length shown in Figure 7. The endless rotation rope 15 is rotated as described above until it reaches the required length corresponding to the excavation depth among the longest length shown in FIG. 6 or the intermediate length shown in FIG. Switch to lock state. This leader 1
Changes in the total length of can be automatically detected as follows.

That is, for example, as shown by the imaginary line in FIG. 2, a pinion gear 26 that meshes with a rack gear 25 attached to the upper leader unit 3 along its vertical direction is pivotally supported on the lower leader unit 2, and is interlocked with this pinion gear 26. A method of counting the emitted pulses of the pulse encoder 27 using an addition/subtraction counter,
Changes in the overall length of the reader 1 can be automatically detected by, for example, detecting detection portions provided at appropriate intervals on the upper reader unit 3 using sensors attached to the lower reader unit 2. In addition, when no slip occurs in the lifting drive system, such as when a chain is used instead of the endless rotation cable 15,
It is possible to use a pulse encoder that is linked to the motor 23 and the sprocket wheel (corresponding to the guide sheaves 16 to 20) that hangs the chain. In this case, when the leader 1 is at its shortest length, The position of the auger machine 4 can be detected accurately.

The shortest length of the leader 1 shown in FIG. 5 (i.e., the shortest length when the auger machine 4 is raised to the upper limit position relative to the upper leader unit 3),
Or, if the endless rotation rope 15 is switched to the locked state while being extended to the required length corresponding to the excavation depth, which is the longest length shown in FIG. 7 or the intermediate length between the two shown in FIG. The auger machine 4 does not descend due to gravity relative to the upper stage leader unit 3. Further, even when the length of the leader 1 is longer than the shortest length, an auger machine connected to the endless rotation rope 15 is required in order for the upper leader unit 3 to descend by gravity relative to the lower leader unit 2. As long as the auger machine 4 is at the upper limit position relative to the upper leader unit 3, 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 to the upper limit position,
The auger main body 28 is set in the auger machine 4, and with the auger main body 28 facing above a predetermined excavation position, the auger main body 28 is driven by the auger machine 4, and at the same time the driving means 2
2, the guide sheave 20 is rotated in the opposite direction, and the endless rotation cable 15 is rotated in the opposite direction in which the straight path portion 15a thereof is lowered.

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. Further, in a state where the upper leader unit 3 cannot be lowered due to gravity, the endless rotation cable 15 directly pulls down the auger machine 4. In either case, the auger machine 4 descends relative to the ground.
And the upper tier leader single 3 is the lower tier leader single 2
When the auger machine 4 is lowered by gravity to the lowering limit position, the endless rotation cable 15 will then pull down the auger machine 4 held at the lowering limit position, and the auger machine 4 will continue to descend from the ground. It is moved and lowered to the lowest position above the ground as shown in Figure 4. 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 cable 15 will forcefully lower the upper unit leader unit 3, and the The auger machine 4 continues to move downward and is lowered 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 raising the auger machine 4 from the ground, the endless rotation rope 15 is moved again in the direction in which the straight path section 15 ascends. All you have to do is rotate it.

Incidentally, when the leader 1 is used with the shortest length as shown in FIG.
directly lowers only the auger machine 4 to the lowest position above the ground as shown in Figure 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 drawings]

Figure 1 is an overall side view, Figure 2 is a vertical cross-sectional side view with some of the main parts cut away, Figure 3 is a cross-sectional plan view of the same, and Figure 4 is a side view of the entire body.
7 to 7 are action explanatory views. 1...Leader, 2...Lower leader alone, 3
... Upper leader unit, 4 ... Lifting member (auger machine), 11, 13 ... Guide rail, 1
2, 14...Slider, 15...Endless rotation cable,
16-20...Guide sheave, 22...Driving means, 23...Motor with brake, 24...Reducer, 28...Auger main body.

Claims (1)

[Claims] 1. 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 leaders, and the elevating member is supported on a single upper leader so as to be movable up and down,
The endless rotating body is hung from the lower end of the lower leader unit to the upper end of the upper leader unit, the lower end of the upper leader unit, and the upper end of the lower leader unit via the guide wheel. , the lifting member and the endless rotating body are connected in a linear path of the endless rotating body from the lower end of the lower leader unit to the upper end of the upper leader unit; A lifting device for a foundation construction machine, which is provided with a drive means that can be forcibly driven in any forward or reverse direction and can be held in a locked state when not driven.