JPH08302732A - Excavator with phasing mechanism - Google Patents

Abstract

PURPOSE: To phase an output shaft and an excavating tool easily by stopping the phase of the output shaft so as to be brought to the same state every time. CONSTITUTION: An excavator with a phasing mechanism has a drive mechanism 10 with a plurality of output shafts 24a, 24b, 24c rotated through a speed reducer 20 by one driving motor 18. A proximity sensor 44 detecting revolution to specified places of the output shafts 24a, 24b, 24c by the facing of a detecting section and a section to be detected fitted to the adjacent output shafts 24a, 24b is mounted. The excavator with the phasing mechanism has a phase control means, by which the output shafts 24a, 24b, 24c are rotated when a phasing switch is turned on and the revolution of the driving motor 18 is stopped when the facing of the detecting section and the section to be detected is detected by the proximity sensor 44.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an excavator with a phase adjusting mechanism for rotating an output shaft to a predetermined phase position when connecting an excavator and an output shaft.

[0002]

2. Description of the Related Art Conventionally, as an excavating device for excavating using an excavating tool such as an auger drill, an excavating device as shown in FIG. 6 has been known. In such an excavating device, a leader 2 is attached to a self-propelled body 1, a stay 4 and a catching hawk 6 are provided.
It is supported by up and down freely. A guide rail 8 is laid along the longitudinal direction of the front surface of the leader 2, and a drive mechanism 10 is mounted on the guide rail 8 to guide the guide 1.
It is engaged via 2 and 14 so as to be able to move up and down.

The drive mechanism 10 is suspended by a wire 16, and the drive mechanism 10 includes a drive motor 18
And a speed reducer 20 to which the drive motor 18 is connected. An output shaft 22 is connected to the output side of the speed reducer 20, and an excavator 24 is detachably connected to the output shaft 22.

The connection between the output shaft 22 and the excavator 24 is shown in FIG.
As shown in, in the hexagonal hole 26 formed in the output shaft 22,
The hexagonal shaft portion 28 of the excavator 24 is inserted. Then, the semicircular grooves 30 and 32 formed in the hexagonal shaft portion 28 up and down in the direction orthogonal to the axial direction and the through holes 34 and 36 formed in the output shaft 22 have pins 38 and 40, respectively. Is inserted to prevent the excavation tool 24 from coming off.

[0005]

However, in such a conventional one, in order to insert the hexagonal shaft portion 28 of the excavator 24 into the hexagonal hole 26 of the output shaft 22, the phase of the hexagonal shaft portion 28 and the hexagonal hole 26 is to be inserted. The grooves 30, 32 and the through holes 34,
36 also has to be adjusted, so 1 of the output shaft 22
The phase matches once with rotation.

One of them must be rotated in order to match the phases, but the excavator 24 is suspended and supported by an auxiliary crane, and since it is heavy, it cannot be easily rotated by the operator. . Therefore, the drive motor 18 is driven to rotate the output shaft 22 to match the phases.

When the phases are matched, the operator operates the operation panel of the drive motor 18 in the driver's seat in the self-propelled main body 1 to rotate the output shaft 22, and this rotation is performed. While watching the signaler outside, the operator confirms that the output shaft 22 has rotated to a predetermined position, sends a signal to the operator, and the operator stops the rotation of the drive motor 18.

However, depending on the timing of the signal of the signal person, the timing of the stop by the operator is deviated,
There is a problem that the output shaft 22 cannot be stopped at an appropriate position and depends largely on the sense and experience of the operator or signaler, and it takes time for the unskilled person to adjust the phase. Some excavators include a drive mechanism that rotates a plurality of output shafts by a single drive motor 18 via a speed reducer, and such an excavator has a problem that it takes more time for phase matching.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an excavating device with a phase adjusting mechanism, which facilitates the phase adjustment between an output shaft and an excavating tool.

[0010]

In order to achieve such an object, the present invention has the following constitution as means for solving the problem. That is, in the excavation device that includes a drive mechanism that rotates the output shaft and an excavator that is detachably connected to the output shaft in phase with the excavation device that excavates the excavator by rotating the output mechanism, the output Phase detection means for detecting rotation of the shaft to a predetermined position, and rotation of the output shaft when the phase matching switch is turned on, and rotation of the output shaft when the predetermined position is detected by the phase detection means. This is the configuration of the excavating device with a phase adjusting mechanism, which is provided with a phase control means for stopping.

Further, the drive mechanism includes a plurality of the output shafts rotated by one drive motor via a speed reducer, and the phase detection means includes a detection unit attached to the adjacent output shafts and a target unit. It may be configured to detect the facing of the detection unit.

[0012]

In the excavator with a phase adjusting mechanism having the above-described structure, the phase detecting means detects the rotation of the output shaft to a predetermined position, and the phase controlling means rotates the output shaft by turning on the phase adjusting switch, When the predetermined position is detected by the detecting means, the rotation of the output shaft is stopped.

In the drive mechanism having a plurality of output shafts and the phase detecting means for detecting the facing of the detecting portion and the detected portion,
When the phase detection means detects the facing of the detection part attached to the adjacent output shaft and the detected part, the driving of the drive motor is stopped and the rotation of the plurality of output shafts is stopped.

[0014]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIG. 1, in the present embodiment, the drive mechanism 10 has a configuration in which one drive motor 18 rotationally drives three output shafts 22a, 22b, 22c via a speed reducer 20. Hexagonal holes 26a, 26b, 26c are formed in the output shafts 22a, 22b, 22c, respectively, and through holes 34 are formed in the directions orthogonal to the hexagonal holes 26a, 26b, 26c, respectively.
a, 36a, 34b, 36b, 34c, 36c are provided.

The three excavating tools 24a, 24b, 24c are
It is rotatably supported by the connecting member 42 at the same intervals as the three output shafts 22a, 22b, 22c. Each excavator 24
At the tips of a, 24b, and 24c, the hexagonal shaft 28
a, 28b, 28c are formed, and the grooves 30a, 32a, 30b, 32b, 30c, 32c are orthogonal to the axial direction.
Are formed.

Then, a pair of adjacent output shafts 22a, 22a
A proximity sensor 44 as a phase detecting means is provided at b, and the detected portion 44a of the proximity sensor 44 is fixed to the output shaft 22a by a mounting member 46, as shown in FIG. . The detected portion 44a is configured to emit light in a predetermined direction.

The proximity sensor 44 is provided on the other output shaft 22b.
The detecting portion 44b is fixed by a mounting member 48.
The detection unit 44b is configured to output a detection signal when receiving the light emission from the detection target unit 44a. When the detection part 44a and the detection part 44b face each other and a detection signal is output, as shown in FIG.
Both hexagonal holes 26a and 26b of 22b face the same direction,
It is configured to be in phase.

In the present embodiment, the remaining output shaft 22c is rotated by the speed reducer 20 in the same direction as the one output shaft 22a at the same speed reduction ratio, so that both output shafts 22a and 22c are rotated.
The phases of the two hexagonal holes 26a and 26c always match. The middle output shaft 22b is rotated in the opposite direction to the one output shaft 22a by the speed reducer 20, but the reduction ratio is the same. The phase detecting means is not limited to the photoelectric proximity sensor 44, and may be an electrostatic capacitance type or a magnetic type. Also, as shown in FIG. 8, the proximity sensor 44 is attached to the main body 20a of the speed reducer 20 by attaching a detected portion 44a that outputs a signal when the emitted light is received by itself, and emits light to the output shaft 22a. A configuration in which the detection unit 44b formed of a light receiving plate that reflects light may be attached.

The proximity sensor 44 and the drive motor 1 described above
As shown in FIG. 5, 8 is connected to the control panel 50, and the control panel 50 is connected to the phase adjustment switch 54 of the operation panel 52 provided in the self-propelled body 1. The control board 50 is configured to rotate the drive motor 18 when the phase adjustment switch 54 is turned on, and stop the drive of the drive motor 18 when a detection signal is input from the proximity sensor 44.

Next, the operation of the excavator with the phase adjusting mechanism of the present embodiment described above will be explained. First, the three excavators 24a, 24b, 24c are suspended by a crane (not shown), and the hexagonal shaft portions 28a, 28b, 28c are arranged below the output shafts 22a, 22b, 22c. that time,
The phases of the hexagonal shaft portions 28a, 28b, 28c are adjusted in advance so as to face the same direction as shown in FIG.

Then, the operator operates the phase adjustment switch 54.
Then, the control board 50 controls the drive motor 18 to rotate the drive motor 18. As a result, the output shafts 22a, 22b, 22c are rotated via the speed reducer 20. In this embodiment, the output shafts 22a and 22c on both sides are rotated in the same direction, and the output shaft 22b in the middle is rotated in the opposite direction. The rotation speed of each output shaft 22a, 22b, 22c is the same.

The output shafts 22a, 22b and 22c rotate as shown by the arrows in FIG.
When facing 4b, the detection section 44b receives the light emitted from the detected section 44a and outputs a detection signal to the control panel 50. The control board 50 receives this detection signal and receives the drive motor 1
Stop rotation of 8.

Therefore, the output shafts 22a, 22b, 22c
However, as shown in FIG. 3, each hexagonal hole 26a, 26b, 26
c is oriented in the same direction, and the through holes 34a, 36a,
34b, 36b, 34c, and 36c are also made parallel to each other and stopped in phase. In this state, when the wire 16 is unwound and the drive mechanism 10 is lowered, the hexagonal shaft portions 28 are inserted into the hexagonal holes 26a, 26b, 26c.
a, 28b, 28c are inserted.

In this way, the detected portion 44a and the detection portion 44 are
output shafts 22a, 22b, 22c when facing b
Stop the rotation of the hexagonal holes 26a, 26b, 26
The hexagonal shaft portions 28a, 28b, 28c have the same phase of c.
Can be easily inserted. After this, pins 38, 4
0 through holes 34a, 36a, 34b, 36b, 34c,
36c, and each output shaft 22a, 22b, 22c and the excavator 24a, 24b, 24c are joined.

In this embodiment, each output shaft 22a, 22b,
Although the rotation speeds of 22c are the same, for example, each output shaft 22
When the gear ratio of a, 22b, and 22c is A: B: A (A and B are integers), when the output shafts 22a and 22c on both sides rotate B and the output shaft 22b in the middle rotates A, 1 The detected portion 44a and the detection portion 44b face each other. When the output shafts 22a, 22b, 22c stop rotating when facing each other, the hexagonal holes 26a, 26b, 26c are in phase with each other, and the hexagonal shaft portions 28a, 28b, 28c can be easily inserted.

When the number of the output shaft is one, the detected part 44a is attached to the output shaft and the detecting part 44b is attached to the speed reducer 20, or vice versa. When the rotation of the output shaft is sometimes stopped, it can be stopped so that the phase of the hexagonal hole becomes the same state every time.

The present invention is not limited to the embodiments as described above, and can be carried out in various modes without departing from the scope of the present invention.

[0028]

As described above in detail, the excavator with a phase adjusting mechanism of the present invention can stop the output shaft so that the output shaft is in the same state every time, and the phase between the output shaft and the excavator is easy. Can be adjusted to Further, in the case of a plurality of output shafts, it is possible to stop in a state where the phases of the respective output shafts are in phase with each other, and there is an effect that the phase alignment between the plurality of output shafts and the plurality of excavation tools becomes easy.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a main part of an excavator with a phase adjusting mechanism as an embodiment of the present invention.

FIG. 2 is an enlarged view of a proximity switch of this embodiment.

FIG. 3 is a view on arrow AA in FIG.

FIG. 4 is a view taken along the line BB of FIG.

FIG. 5 is a block diagram of an electric system of the present embodiment.

FIG. 6 is a side view of the excavator.

FIG. 7 is an enlarged perspective view showing the connection between the output shaft and the excavator.

FIG. 8 is an explanatory diagram showing attachment of a proximity switch as another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Self-propelled main body 10 ... Drive mechanism 18 ... Drive motor 20 ... Reduction gears 22, 22a, 22b, 22c ... Output shafts 24, 24a, 24b, 24c ... Excavator 26, 26a, 26b, 26c ... Hexagon socket 28, 28a, 28b, 28c ... Hexagonal shaft part 44 ... Proximity sensor 44a ... Detected part 44b ... Detecting part 54 ... Phase matching switch

Claims (2)

[Claims] 1. A drilling device comprising: a drive mechanism that rotates an output shaft; and a drilling tool that is detachably connected to the output shaft in phase with the drilling tool. , Phase detecting means for detecting that the output shaft has rotated to a predetermined position, when the phase matching switch is turned on, the output shaft is rotated, and when the predetermined position is detected by the phase detecting means, the output An excavator with a phase adjusting mechanism, comprising: a phase control unit that stops rotation of a shaft. 2. The drive mechanism includes a plurality of output shafts rotated by a single drive motor via a speed reducer,
The excavation device with a phase matching mechanism according to claim 1, wherein the phase detection unit detects a facing portion between a detection unit and a detection unit attached to the adjacent output shafts.