JPH0711237B2 - Measuring device for drilling rod in drilling machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a measuring device for a drilling rod in a drilling machine.

[Conventional technology]

When piercing with a piercing rod such as in grout injection, it is extremely important to control the piercing length.

In this type of punching machine, a spindle type
Medium size punch, medium to large drive head type punch,
Turntable type punching machine, guide cell type punching machine in which the drive unit rides on the guide bar and drills forward and backward and up and down on the guide bar, or power swivel drilling in which a leader type inner boring rod or casing penetrates the drive unit. There are machines, etc.

In any case, the control of the perforation length is performed for the purpose of defining the improvement zone, confirming the workability after the work, and the like.

[Problems to be Solved by the Invention]

However, in this case, there is a risk that the drilling length may be erroneously measured and the buried pipe or the like may be damaged due to the wrong number of drilling rods.

Therefore, a main object of the present invention is to provide a measuring device for a drilling rod in a drilling machine capable of accurately measuring the drilling length.

[Means for Solving the Problems]

The above-mentioned problem is a measuring device attached to a drilling machine that feeds while rotating a drilling rod around its axis, wherein the peripheral surface is in direct contact with the surface of the drilling rod and the feeding of the drilling rod is advanced. A rotating body that has an axis in a direction orthogonal to the direction and that is driven to rotate along with the advance of the drilling rod, and a measurement for measuring the advance length of the drilling rod based on the number of revolutions or the circumferential length of the rotor. The vessel is attached to a co-rotating body that co-rotates with the drilling rod in the drilling machine.

[Action]

According to the present invention, there is provided a rotating body whose peripheral surface is in direct contact with the surface of the piercing rod and which has an axis in a direction orthogonal to the feeding direction of the piercing rod and which is subordinately rotated as the piercing rod is advanced. If you detect the number of revolutions or the circumference of the rotor,
The feed length of the piercing rod can be measured.

However, when drilling with the drilling rod, the drilling rod itself is rotated and advanced. Therefore, when the rotator is always brought into contact with the piercing rod while being fixed to the ground, the rotational force of the piercing rod acts on the rotator, as can be inferred from FIG. It may damage the mechanism.

By the way, in the spindle type punching machine, after the length is measured only when the spindle is raised, the ascent is completed, and before the feeding while rotating the drilling rod, the contact of the rotating body with the drilling rod is disconnected. If you do,
A mechanism for switching between the contact of the rotating body with the drilling rod and the separation is required.Even if this mechanism is provided, it is necessary to contact the rotating body with the drilling rod each time the unit rod is added. If the wear rate is high and the length is measured while the wear progresses, the accuracy of the length measurement will deteriorate.

On the other hand, in the present invention, since the rotating body is attached to the co-rotating body that co-rotates when the drilling rod rotates, for example, the spindle head, the rotating body is always contacted with the drilling rod. Can be long. Therefore,
It is possible to prevent damage or wear of the rotating body, and also to prevent damage to the support mechanism of the rotating body.

〔Example〕

 The present invention will be described below with reference to embodiments shown in the drawings.

1 to 2 show specific examples of the device of the present invention.

1 is a punching machine main body, which has a built-in drive motor, hydraulic power source, and the like. A guide 2 is attached to the punching machine body 1 on a rotating plate 3 which is rotatable around a horizontal axis. Guide 2
A spindle 4 is inserted in the and a lifting cylinder 5 is attached to the spindle. A fixing plate 6 for integrally raising and lowering the spindle 4 is connected to the rod of the raising and lowering cylinder 5 above the spindle 4. Further, a spindle head 7 is fixed to the upper part of the spindle 4, and a chuck 8 is fixed to the lower part. These spindle heads 7,
A piercing rod 9 is inserted through the fixed plate 6, the spindle 4 and the chuck 8. 10 is a swivel that feeds drilling water and grout. Such a structure is known as a spindle punch.

In the present invention, the following length measuring device is attached to this punching machine.

That is, as shown in FIG. 4 (b), the case 20 is fixed to the upper part of the spindle head 7 by the bolts 21, and the bottom plate 20a thereof has an L-shaped bracket 2 as shown in FIG.
2 is fixed, and is further rotatably supported by a rotary shaft 25 at the other end of an arm 24 pivotally attached to the bracket 22 via a pin 23, and a rotary body 26 is fixed to one end of the rotary shaft 25. . Here, the spindle 4 or the spindle head 7 and the case 20 fixed to the spindle 4 or the spindle head 7 constitute the co-rotation body according to the present invention.

Irregularities for preventing slippage are formed on the peripheral surface of the rotating body 26. The rotation speed of the rotating body 26 is detected by a rotary encoder 27 attached to the other end of the rotating shaft 25.

Further, a pressing rod 28 is pivotally attached to the upper portion of the arm 24, and a repulsive spring 29 is interposed between the pressing rod 28 and the bracket 22, so that the rotating body 26 is constantly pressed against the outer peripheral surface of the boring rod 9.

Therefore, when the case 20 moves up and down, the rotating body 26 is driven to rotate, which causes the rotary encoder 27 to rotate,
The vertical length of the case 20, that is, the vertical length of the spindle 4 is detected by the pulse based on this rotation. The vertical movement length is displayed on the digital display unit 30 as shown in FIGS. 2 and 4 (b). 31 is an alarm device that issues an alarm when the set length is reached.
B is a depth setting device, 33 is a battery power supply unit, and 34 is a computing unit.

In the apparatus configured as described above, the measurement is performed as follows.

FIG. 5 shows a state in which the measuring device X is attached to the spindle head 7. From this state, as shown in FIG. 6, while inserting the drilling rod 9 into the spindle 4 of the drilling machine 1,
Install swivel 10 and bit 11. At this time, the bit 11 is brought into contact with the other surface GL, and the power of the measuring device X is turned on with this contact point as a reference point. Therefore, the display on the display unit 30 is “00.00”.

After that, loosen the chuck 8 and set the spindle 4 to the upper end 1
Pull up by the stroke. At this time, since the rod 9 is stationary, the rotating body 26 rotates while contacting the rod 9 and the pull-up length is displayed. If the length of one stroke is 50 cm, "00.50" is displayed at the end of pulling up in FIG. 7 to indicate the 50 cm to be drilled.

Next, the chuck 8 is tightened to start perforation as shown in FIG. 8, and rotary perforation for one stroke is performed as shown in FIG. In this state, the spindle 4 and the case 20 also rotate as the rod 9 advances, so "00.50"
It remains.

Then, as shown in FIG. 10, when the chuck 8 is loosened and the spindle 4 is pulled up by one stroke in order to perform the next stroke, the display unit 30 displays "01.00".

Next, as shown in FIG. 11, the chuck 8 is tightened and the second stroke is punched. Although FIG. 12 shows the completed state of the second stroke, the display remains "01.00".

When such drilling is performed sequentially and the preset depth is set to 15.00 m, as shown in Fig. 13, when the pulling up of the 30th stroke from the beginning is completed, the display becomes "15.00",
The alarm buzzer 31 sounds and the operator is notified. However, at this point, it is actually 14.50 m from GL, and when the perforation of this stroke is completed as shown in Fig. 14,
“15.00” is displayed on the display unit 30.

Next, as shown in FIG. 15, pulling up for one stroke or pulling up with rotation is performed from the state of FIG. 14, and ground improvement such as grout injection is performed in the process. After that, when the chuck 8 is loosened and the spindle 4 is lowered to the lower end as shown in FIG. 16, the rotating body 26 is reversed, and when the lower limit is reached, "14.50" is displayed.

Thus, pulling up the rod 9 and descending only the spindle 4 are repeated in sequence, and when the ascent of the 10th stroke is completed, as shown in FIG. 17, "10.50" is displayed, and then the chuck 8 is loosened and the spindle 4 is rotated. When lowered,
The display becomes "10.00", the alarm buzzer 31 sounds, and the operator is notified.

The above-described measuring operation is the same for the drive head type and the guide cell type power swivel type.

FIG. 19 shows a turntable type punch 1 ′ and a measuring device X ′.
Shown with the attached. The measuring device X'is mechanically attached to the turntable driving unit 50 of the punching machine 1 '. The turntable drive unit 50 constitutes the symbiotic body of the present invention.

Most turntable punches 1'has no chuck mechanism in the drive unit. Therefore, the rods and casings to be used are made of square pipes or round pipes that are specially processed so that the rotational movement of the drive unit is directly transmitted to the rods 9 '.

In this punching machine, the output from the power source in the punching machine body 1'is transmitted to the table driving unit 50, and the measuring device X'is rotated together with the rod 9 '. Guide 51 for press fitting and withdrawal
Take the winch through the wire rope 53 along the tower 52
54 to do.

In such a punching machine, unlike the spindle type, since there is no chuck mechanism, the rod 9'is moved up and down simultaneously with rotation. Therefore, during drilling and pulling up, the display of the measuring device X'is always displayed continuously. Further, when the set perforation depth and the pulling depth are reached, a buzzer sounds and the operator is notified.

〔The invention's effect〕

As described above, according to the present invention, there is an advantage that an accurate measurement can be performed on a piercing rod that is fed while rotating.

[Brief description of drawings]

FIG. 1 is a perspective view of a measuring device attached to a spindle-type punching machine, FIG. 2 is a conceptual diagram of the measuring device, FIG. 3 is a perspective view of essential parts, and FIG. 4 (a) is a plan view. ) Is a front view, fifth
Figures 18 to 18 are front views showing the measuring mode in sequence, FIG. 19 is a perspective view of a turntable type punch, and FIG. 20 is a front view. 1, 1 '... Punching machine main body, 4 ... Spindle, 9, 9' ... Punching rod, 24 ... Arm, 26 ... Rotating body, 27 ... Rotary encoder, 29 ... Repulsion spring, X, X '... Scale measuring device.

Claims (1)

[Claims] 1. A measuring device attached to a drilling machine that feeds a piercing rod while rotating the piercing rod about its axis, wherein a peripheral surface of the piercing rod is in direct contact with the surface of the piercing rod and the piercing rod is fed. A rotating body that has an axis in a direction orthogonal to the advancing direction and is driven to rotate as the boring rod is advanced, and the advancing length of the boring rod is measured based on the number of revolutions or the circumferential length of the rotating body. A length measuring device is attached to a co-rotating body that rotates together with a boring rod in the boring machine.