JPS58153819A - Winding up and down amount detector for operating tool of pile driver - Google Patents

Abstract

PURPOSE:To automatically make correction for the abrasion of a sheave and a rope by a method in which the turning angle of the sheave during the period when a leader goes down a fixed section is measured by an earth auger and the turn number of the rope is automatically calculated from the amount of the rope being sent out. CONSTITUTION:When an earth auger 13 goes down along a leader 6, a limit switch 14 attached at a given distance interval to the side of the leader 6 is turned on by a bar 12b provided to a working machine 12. Then, the amount of a rope sent out is calculated from the turning angle and the diameter of a sheave 12a, and the turn number of the rope is calculated by an arithmetic unit and automatically set since the distance between the switches 14 is already known. When the diameter of the sheave 12a becomes smaller due to abrasion, because the turn number of the rope does not become integer, true diameter of the sheave 12a is calculated by replacing it with an approximate integer, and the value is replaced with the value set at first.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a wire rope that is suspended from a plurality of hooks, and the wire rope is wound 9. A device for detecting the amount of hoisting and hoisting of a working tool of a pile driver, which uses a working tool such as an earth auger or an earth drill that can freely slide up and down using a leader as a guide as it is fed out and drives a pile after drilling. It is related to.

In pile driving work, especially in drilling work using an earth auger, it is important to know the drilling speed during the depth of the hole for the operation of the pile driver and the construction. Above, various devices for detecting the amount of unwinding have been considered.

Among these, the most common one is the rotation angle of the guide sheep of the wire rope that suspends the working tool of the pile driver.
F, is the number of revolutions), and from this value and the value of the center diameter of the lobe of the guide sheep, which is previously set and stored in the calculation storage device, calculates the amount of rope winding and unwinding in the calculation storage device, This calculation result and the number of ropes to be hung on the work tool are set by manual operation such as a cut-off switch.
There is a device that detects the lower fish hold.

However, with such a conventional device, there are many cases of unsightly problems.

(1) Since the rope hook number is set in the arithmetic storage device manually using a changeover switch, etc., it is necessary to re-enter it each time the rope hook number is changed, which is troublesome and %') There is also the risk of setting a friend value.

(i) If the guide sheep is worn due to contact with the wire lobe and the center diameter of the guide sheep's rope changes, the number of rope turns, amount of payout, and amount of hoisting and lowering of the work tool will be calculated based on the calculation results in the arithmetic storage device. There will be a difference between these actual values and accurate values will not be obtained.

(3) As mentioned in (2) above, if there is a difference between the calculation result and the actual value, in order to correct this, it is necessary to store the memorized value of the rope center diameter of the guide sheep in the calculation storage device in advance. It is necessary to change the value to the actual measured value after the guide sheet has worn out, or to replace the guide sheet with a new one.

(4) If the lobe diameter of the wire rope used differs from the specification, the center diameter of the guide sheep rope will change in the same way as in the case (2) above, and the exact amount of hoisting and lowering of the work tool will be affected. I can't get the value.

The present invention has been made in order to solve the above-mentioned problems, and is capable of hoisting and hoisting a working tool for a pile driver, which is capable of hoisting and hoisting a working tool two times with high accuracy with extremely simple operation. An object of the present invention is to provide a lowering amount detection device.

To achieve this goal, my friend, I am hanging from a wire rope (multiple hooks), winding up this rope, and pulling out the first part! In a pile driving machine that uses a vertically slidable working tool as a guide to drill holes and drive nine-ilK piles, a sheep rotation angle detector detects the rotation angle of the guide sheep of the wire rope; At least one pair of work tools are arranged in a predetermined direction in a predetermined direction, and a work tool and a detector detect passage of the work tool sliding up and down guided by a leader, and a sheave rotation angle detected by the sheave rotation angle detector. Winding the rope from the pre-stored value of the rope center diameter of the sheep.

In addition to calculating the payout t, the distance between the pair of work tool detectors stored in advance and the winding and payout of the rope where the work tool passes between the pair of work tool detectors are calculated. an arithmetic storage device that calculates the hoisting and hoisting amount of the working tool from the ratio of the amount of the work tool and the winding and unwinding amount of the rope; and a display device that displays the calculation results of the arithmetic storage device. There are nine things that are composed of ** and having the following.

The present invention will be described in detail below with reference to FIGS. 1 to 5.

Figure 1 is a side view showing an example of a pile driver to which the work tool hoisting and lowering amount detection device according to the present invention is applied; Figure taken out and shown %1l
Figure K4 is a sectional view taken along the line IV-IV in Figure 3, and in each of these figures, 1 is the main body of the piling machine consisting of the lower traveling body 2, the winch 3t, and the upper revolving body 4 equipped with it. 5 is bin-jointed to the frame of the upper revolving body 4, and the leader 6
Connect the intermediate part of the front, doppler, ketsuto, 8, and rear 6 supported via the T pin 7 to the rear of the upper revolving body 4, and support the leader 6t from the rear, This is a backstay that changes the angle of the leader 6 by adjusting its length, and is provided on both the left and right sides. 9, the front plate was placed on the top of the leader 6, and the front plate was placed on the top of the front plate. Ronto guide sheep, 11 is lie, /chi 3
The wire rope is wound, stowed and unloaded by a winch 3, is turned upward by a front guide sheep 10, and is further guided downward by a dog sheep 9. Reference numeral 12 denotes an earth auger main body (hereinafter referred to as a working tool) consisting of a drive device for rotationally driving an auger screw 13 for boring into the ground, and is equipped with an electric motor or a hydraulic motor (not shown), a speed reducer, etc. In this case, the work tool 12 is
The sheep block 12a above the sheep block 12a is suspended from the wire rope 11 by multiple hooks, and the wire rope 1
It is possible to freely slide up and down using the leader 6 as a guide by rolling and unrolling 1. Reference numeral 14 denotes a pair of working tool detectors disposed at a predetermined distance in the vertical direction of the leader 6, in this case limit switches, which are attached to the working tools 12&C*b and are activated by the next par 12b to prevent the passing of the working tool 12. To detect. In this case, wiring to the limit switch 14 through the inside of the reader 6 is effective for maintaining the wiring. 15
Sheep 9 or lOl guiding wire wire rope 11
Here, a sheep rotation angle detector that detects the rotation angle of the sheep lO, for example a photoelectric switch, is used, and a light emitting element 15 that is arranged facing each other with the surface of the arm 10a of the sheep lO interposed therebetween.
& and the light receiving element 15b, the rotation angle of the sheep 10 is converted into a pulse number and detected. Reference numeral 16 denotes a sheep bracket that supports the sheep 10 at a rotational position, and is provided with the photoelectric switch 15 and is fixed to the front bracket 5. Reference numeral 17 is provided on the upper revolving body 4, and is used to determine the rope winding, the amount of m out, the number of ropes, and the operation based on the signals from the limit switch 14 and the photoelectric switch 15 and the rope center diameter of the guide sheep 10 stored in the internal memory S. Ingredients 12
An arithmetic storage device 18 for calculating the hoisting and hoisting amounts of the work implement 12 from the arithmetic storage device 17 is provided at a position that is easy to see from the pile driving machine operator, such as an instrument panel (not shown) of the upper revolving structure 4.
This is a display device that receives the signal of the calculation result of the amount of hoisting and 9 hoisting and displays it numerically.

Now, when performing drilling work with a pile driver as shown in Figure 1, the depth of the hole is determined by the working tool (earth auger main body) 12
It is equal to the lowering amount of the working tool 12, and is determined by adding the length of the auger screw IJ-13 to the lowering amount of the working tool 12 in the case where the auger screw 13 is added. here,
As mentioned above, the working tool 12 is guided by the pile driver 6 and is slid up and down. This is done by rolling matTo or unrolling. At this time, it is common to have multiple hooks between the top sheep 9 of the wire rope 11 and the leader 6 and the sheep block 12a provided on the upper part of the work tool 12. Therefore, the amount of lowering of the work tool 12 is
This is the value obtained by dividing the amount of rope 11 that is fed out by the number of rope hooks.

This will be explained in detail below. Note that the process of winding up the wire rope 11 with the winch 3 and hoisting up the work tool 12 is the same as the case of lowering the work tool 12, so here we will discuss the case of letting out the wire rope 11 and lowering the work tool 12. A description of the case will be omitted.

Now, the payout amount Lt of the wire rope 11 - the guide sheave 1
If it is determined from the rotation angle 0 of 0 and the rope center diameter D of the guide sheep lO (see FIG. 4), it can be expressed as the following equation (1).

L = D/2φθ・・・・・・・・・・・・・・・
...... (1) Next, this wire rope 11
To determine the lowering amount H of the working tool 12 from the amount of feedout, the value of the rope hook number n is used and expressed as the following (1 equation).

H=L/n・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・ (2) Hitoshi K and work tool 1
In order to obtain the lowering amount of 2, it is necessary to provide the rope center diameter of the guide sheave lO and the rope hanging number n.In the conventional device, the former value is stored in the arithmetic storage device, and the latter value n is set as To9. Set by manual operation such as turning a switch.l)
Met.

In the iron amount of the present invention, the rope center diameter of the guide sheep 10 is stored in the calculation storage device 17 in the same way as in the case of the conventional iron amount, but the rope number n is automatically stored in the calculation storage device 17 by the method described below. First, remember @1
As shown in the drawings and FIG. 2, a work tool detector, here a beam spot 14, is attached to two points in the vertical direction of the leash f6 to detect that the work tool 12 has passed through each of these points.

- 10,000, operate the limit switch 14 from the work tool 12 -
A bar 12b is protruded to allow the limit switch 14 to be turned on when the work tool 12 passes the plate-attached position of the IT switch 14. in this case,
The mounting positions of the pair of limit switches 14, 14 are selected to be such that the working tool 12 always passes during setup before drilling.

Next, detection of the rotation angle of the guide sheep IO will be explained. The rotation angle of the guide sheep IO can be detected using a generally known photoelectric proximity switch or a rotary encoder based on these principles. Here, a device using a photoelectric switch 15 (15m, 15b) as shown in FIG. 8113 and FIG. 4 will be described. In this case, the photoelectric switch 15,
The light emitting element 15 m and the light receiving element 15 b are arranged to face each other so that the arm 101 of the guide sheep 10 intermittently blocks the optical axis of the p-photoelectric switch 150 as the guide sheep 10 rotates.

Now, if we consider the case where the number of arms of the guide sheep 10 is m, the photoelectric switch 15 will turn ON or OFF at the rotation angle 2π/m41 of the guide sheep 109, and the photoelectric switch 15 will turn ON once 9# :1. The rotation angle j0 of the guide sheep 10 between turning OFF and turning ON the next time is 2π) −=−・・・・・・・・・・・・・・・・・・・・・・
(4) ON -OFm' of the photoelectric switch 15
When the signal is treated as a pulse signal and the rotation angle of the guide sheep 10 is determined from the number of pulses p, an analogous width is obtained as shown in equation (6) for the expansion of the rotation angle θ of the actual guide sheep 10.

−・p≦0〈2(p+1)・・・・・・(5)2π m m However, due to the convenience of calculation, as shown in the following two equations (5), It appears. ), =27r・
p ・・・・・・・・・・・・・・・・・・ f5)' From the above, a method of automatically calculating the rope hook number will be explained. First, place a good pair of IJ j in the reader 6.
The distance between the limit switches 14 and 14 is 1□, t, and the rotation angle signal is output from the photoelectric switch 15 from the time when one limit switch 14 is turned on until the other limit switch 14 is turned on. When the number of pulses is α, the length of the nine ropes ΔL when the work implement is wound up or unwound between the pair of gate switches 14 and 14 is expressed as follows.

) L Once!・α=j! l! ! 2L 24 ・・・・・・
...... (6) 2 mm At this time, the number of ropes is n, and the number of ropes is 1.
．． (7) It is determined by t or m, and the value of this rope multiplication number n and the above (1), +
From the value of L obtained from Equation 51', the lower hoisting amount of the working tool 120 is obtained from the above (2) 2, and is expressed as the following Equation (8).

As described above, according to the device of the present invention, the arithmetic storage device 1
By calculating the above equation (8) according to 7, it is possible to automatically and accurately detect the lower and upper hoisting amount of the work tool 120 without having to perform manual operations such as setting the rope hook number n. can.

In addition, according to the device of the present invention, the guide sheep lO
When the rope center diameter of the guide sheep 10 differs from the value measured and stored in advance, such as when the wire rope 11 itself is worn out, or when the wire rope 11 has a diameter different from the specifications. Also, arithmetic storage device 1
By simply adding the calculation function 7, it is possible to automatically correct the center diameter of the rope of the guide sheep 10 and accurately detect the amount of hoisting and lowering of the work implement 12 in one hoist. This K will be explained below. That is, since it is a 714d lobe multiplier determined by the above equation (7), it can only be an integer value.

Therefore, the calculation result of equation (7) is obtained as a temporary rope multiplier, and if the value of n is not an integer, convert it into an integer using a method such as 4 to 5 and set it as n'. -O
The value of the rope center diameter of the guide sheep lO is corrected inversely from the value of n'. That is, guide sheep 10
If the value (corrected value) of the actual rope center diameter is D',
This D' expansion formula (7) is modified as shown below (calculated using the plow formula, and this value is replaced with the previously stored value DK and re-stored in the arithmetic storage device 17, so that the working tool 1' 2
What is necessary is to calculate the amount of 0th turn up and 2nd turn down.

D'=n'・□ ・・・・・・・・・・・・・・・
(9) π・α However, when performing such a correction, care must be taken to ensure that the actual value of the pulse number α is 2π, as shown in equation (5) above. This is because the accuracy of the correction is influenced by the magnitude of the error value 1-, and in order to improve the accuracy of the correction, the value 2 must be made as small as possible. Therefore, the rotation angle detection of the guide sheave 10 is
It is necessary to rotate the guide sheep 1001 times without using the photoelectric switch TSL shown in Fig. 4, and to use a detection VM with a large number of pulses m. If you use m=100
It is easy to set the number to about 1,000, and high-precision kudzu correction is possible.

As explained above, the calculation flow for detecting the amount of hoisting and hoisting and hoisting of the good nest tool 12 and correcting the center diameter of the rope of the guide sheave IO is shown in Figure @5.

In FIG. 5, the same symbols or corresponding parts as in FIGS. 1 to 4 are shown.

In the above-mentioned embodiment, the explanation was centered on the detection of the amount of lowering of the work tool 12, but the work tool 12 is
Similarly, it is possible to detect the amount of lowering. Detection of the rotation angle and rotation direction of the guide sheep 10 can be easily realized by using the rotary encoder-applied rotation angle detector equipped with a rotation direction detection function, which is commercially available.

(9) The arithmetic storage device 17 may be configured by combining arithmetic elements and storage elements, but it is also advantageous to configure it using a microcomputer, which makes the device more compact and also expensive. to be able to do something
1. Further, in the above-described embodiment, the work tool 12 has a pair of glue [
While moving between the switches 14 and 14, the winding or unwinding is calculated by the length ΔL7.
When the work tool 12 is closed, the limit switches 14, 1
It is assumed that the robot moves in one direction without changing direction between the two. At this ninth point, when the work tool 12 is moved up and down by the switches 14 and 14, an error in the rope length (L) will occur, but this difference, as mentioned above, will occur. The direction of rotation of the guide sheave 100 is detected, and only the movement of the work tool 12 in one direction is added.
This can be eliminated by calculating the ptm lobe length ΔL by, for example, subtracting the added value for the movement of the work tool 12 in the opposite direction from this added value.

Furthermore, in the above embodiment, an earth auger was used as an example of the working tool 12 of a pile driver, but it goes without saying that the present invention is also applicable to earth drills and the like.

As mentioned above, the unexploded @14Ia, the winding and unwinding amount of the wire rope is calculated based on the sheave rotation angle detected by the sheave rotation angle detector and the pre-stored copy of the sheep rope center diameter. The number of ropes to be hung on the work implement is determined from the ratio of the distance between the stored distance between the pair of work implement detectors and the winding and unwinding length of the wire rope while the work implement communicates between the work detectors. Calculate and calculate the number of loaders to be used and the amount of winding and feeding of the wire rope to hoist the work tool.
Since it is configured with an arithmetic storage device that calculates the amount of lowering,
It has the following effects.

+17 Manual operation for setting the number of ropes to be applied to the arithmetic storage device is not necessary, and the rope operation becomes simple, there is no setting error, and 111 degrees can be increased.

(2) The center diameter of the guide sheep rope changes due to wear due to long-term use of the guide sheep or wire rope, or the use of a wire rope with a diameter different from the specifications, and it differs from the value stored in advance in the arithmetic storage device. Even if the center diameter of the guide sheave rope is automatically corrected by adding a small amount of calculation function to the calculation memory (4C calculation function), the rope center diameter of the guide sheave can be automatically corrected without having to do troublesome work such as replacing the guide sheave or wire rope. It is possible to accurately detect the hoisting and hoisting weights of working tools.

(3) Even when detecting the lifting load, etc. at the same time as detecting the hoisting and hoisting and lowering loads of the work tool, if the tension of the wire rope is detected, it can be easily done using the rope hanging number determined by the arithmetic storage device. The answer can be equipped with various safety functions such as being able to perform calculations, and is useful for preventing accidents caused by setting errors in conventional devices in which the number of ropes to be hung is manually set.

[Brief explanation of drawings]

1st diagram: A side view showing an example of a pile driver to which the device for detecting the amount of hoisting and lowering of a working tool according to the present invention is applied, FIG. 2 and @3
The figure shows the main parts of Figure 1, and Figure 4 shows the main parts of Figure 3.
The cross-sectional view taken along the line IV-IV in the figure, Figure @5, is a block diagram showing the calculation flow for detecting the amount of hoisting and lowering of the working implement per hoisting amount and correcting the center diameter of the rope of the guide sheep by the device of the present invention. DESCRIPTION OF SYMBOLS 1...Piling machine main body, 3...Winch, 6...Leader, 9...Top sheep, IO...Front guide sheep, 11...Wire rope, 12...Work tool (
Earth auger body), 12a... Sheep block, 1
2b...Par, 13...Auger screw, 14...
・Limit switch, 15...Photoelectric switch, 15a
... Light emitting element, 15b... Light receiving element, 17... Arithmetic storage device, 18... Display device. Patent Applicant Hitachi Construction Machinery Co., Ltd. Representative Patent Attorney Masami Akimoto 1','□・□・

Claims (1)

[Scope of Claims] 1. The wire rope is suspended by multiple hooks 9, and the wire rope is wound and unrolled using a working tool that can freely slide up and down using the p-league as a guide. In the pile driving machine that drives the pile after the pile is driven, at least one pair of sheep rotation angle detectors for detecting the rotation angle of the sheep guided by the entire wire rope and a predetermined distance device in the vertical direction of the leader are disposed on the leader. A work implement detector detects the passage of the work implement that is guided and slides up and down, and the sheep rotation angle detected by the sheep rotation angle detector and the pre-stored value of the rope center diameter of the sheep are used to calculate the In addition to calculating the winding and #I output amount of the rope, the distance between the pair of work implement detectors stored in advance and the distance during which the work implement passes between the pair of work implement detectors are calculated. Calculate the number of ropes to be hung on the working tool from the ratio of the winding and unwinding lengths of the rope, and calculate the calculated number of ropes and the winding of the rope,
A working implement winder for a pile driver, characterized in that it is equipped with an arithmetic storage device that calculates the amount of hoisting and 9 hoisting of the working tool from the amount of feeding, and a display that displays the calculation results of the arithmetic storage device. Top 9
Lowering amount detection device. 2. The calculation storage device calculates the actual rope center diameter of the sheep from the values pre-stored in the device and the calculation results, and uses the calculated value as the pre-stored rope center diameter of the sheep. Re-memorize the value and use it for subsequent hoisting of the work tool 9
2. The device for detecting the amount of hoisting and lowering of a working implement of a pile driver according to claim 1, which has a function of calculating the amount of hoisting based on the re-memorized value.