JPH0715911Y2 - Safety device for storing auger - Google Patents

Description

[Detailed Description of Device] a. The purpose of the invention (industrial application field) The present invention relates to a digging device including a boom and an auger attached to the boom, and more specifically, safety for ensuring safety when the auger is stored in the digging device. Regarding the device.

(Prior Art) There has been conventionally known a digging column truck in which a boom is mounted on a vehicle body so as to be freely turnable and undulating, and an auger (drill for drilling) is attached to a tip of the boom. In this digging column vehicle, it is usual to make the boom extendable and retractable in order to increase the working range, and to make it possible to store the auger along the boom for compactness when not in work.

(Problems to be solved by the invention) In this case, the auger is stored at a predetermined position when the boom is completely retracted (fully retracted state). When stored,
There is a problem in that the auger interferes with the stay for supporting the auger attached to the boom and damages the drill blade.

It should be noted that the confirmation of whether or not the boom is in the fully retracted state is often made visually, and it is often mistakenly determined that the boom is in the fully retracted state even when the boom is slightly extended from the fully retracted state. It can be said that the above problems are likely to occur.

In view of such a problem, the present invention has an object to provide a safety device capable of preventing the above problem by restricting the storage of the auger when the boom is not in the fully contracted state.

B. Configuration of the Invention (Means for Solving the Problem) As means for achieving such an object, in the present invention, a boom full contraction detecting means for detecting whether or not the boom is in a fully contracted state, and an auger are provided. An auger storage safety device is composed of a storage operation detecting means for detecting whether or not the storage operation is in progress, and a storage operation restricting means for restricting the operation of the storage means, and the boom is in a fully retracted state by the boom fully retracted detection means When it is detected that the auger is not being stored, the storage operation detecting means restricts the storage operation of the auger when the storage operation detecting means detects that the auger is in the storage operation. .

(Operation) When such a safety device is used, even if the auger is to be stored even when the boom is not in the fully retracted state, the storage restricting means operates and the storage of the auger is restricted. Therefore, it is possible to prevent the auger supporting stay or the like from interfering with the auger and damaging the auger drill blade or the like when the auger is stored.

(Embodiment) Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.

FIG. 2 shows a digging column vehicle 1 equipped with a safety device according to the present invention. The digging column vehicle 1 has a swivel base 3 which is rotatable on a vehicle body 2, and a boom 4 which is controlled by a cylinder 5 in an elevation direction is attached to the swivel base 3.
The boom 4 includes a first boom 4a connected to the swivel 3 and second and third booms 4b and 4c telescopically attached to the first boom 4a.
The second and third booms 4a and 4b are extendable and retractable. The first boom 4a is provided with a stay 6 that supports the auger device 10 when the auger device 10 is stored.
The hook 8 of the crane device is suspended at the tip of the third boom 4c.

An auger device 10 is attached to the tip portion of the third boom 4c in this figure via a support member 7. This auger device 10 includes a hydraulic drive auger motor 11 and a drill 12 (rod) that is driven to rotate by the auger motor 11.
12a and a blade 12b), and a connecting member 13 that connects the auger motor 11 and the support member 7. In this figure, the support member 7 is the third boom.
Although attached to the tip of 4c, the support member 7 can also be attached to the first boom 4a. Therefore, when performing the digging work using the auger device 10, the support member 7 is attached to the third boom 4c as shown in this figure, while the digging work is not performed and the crane work by the hook 8 is performed. In this case, the support member 7 can be attached to the first boom 4a and stored.

The auger device 10 in the digging / construction column vehicle 1 having such a configuration will be described.

FIG. 3A shows a state in which the auger device 10 performs a digging work. At this time, the second and third booms 4b, 4c are extended by a predetermined amount such that the support member 7 positions the auger device 10 attached to the tip of the third boom 4c at a predetermined position. The auger device 10 extends downward from the support member 7 and is directed toward the ground. In this state, the boom 4 is rotated while driving the auger motor 11 to rotate the boom 4.
If the drill 10 is moved downward, the drill 12 is rotated to dig the ground and dig a hole.

When digging is completed and the auger device 10 is to be stored, the second
And after the third boom 4b, 4c is completely retracted, one end is first
The other end of the storage wire 9 attached to the boom 4a is locked to the rod 12a of the drill 12 and the drill 12 is rotated by the auger motor 11. As a result, the storage wire 9 is a rod.
Auger motor 1 as shown in Fig. 3B while wrapped around 12a
The 1 and the drill 12 are integrally rotated about the connecting member 13. Finally, as shown in FIG. 3C, the auger motor 11 and the drill 12 are stored in a position in which the auger motor 11 and the drill 12 are substantially parallel to each other along the boom 4, and in this stored state, the rod 12a of the drill 12 is held by the stay 8. To be done.

The case where the second and third booms 4b and 4c are completely contracted and the boom 4 is in the fully contracted state has been described above. However, as shown in FIG. 4, the second boom 4b or the third boom 4c is slightly extended. Therefore, let us consider the case where the state is not fully contracted. Also in this case, if the storage wire 9 is locked to the rod 12a and the auger motor 11 is driven, the motor 11 and the drill
12 can be stored, but the motor 11 and the drill 12 are stored at the tip end side (right side in the figure) by the extent that the boom 4b or 4c is extended. Because of this, the drill
There is a problem that the blade 12b of 12 interferes with the stay 6 and the blade 12b is damaged.

However, in this example, the first and second limit switches 21,2
2 is provided, and these are used to regulate the storage of the auger when the boom 4 is extended as described above.

The first limit switch 21 is attached to the support member 7 and operates when the turning angle of the drill 12 exceeds a predetermined angle. Specifically, as shown in FIGS. 3B and 4, the limit switch 21 is ON when the drill 12 is within the rotation angle range indicated by B, and is OFF when the drill 12 is within the rotation angle range indicated by A. Is. The digging work is performed with the boom 4 positioned near the horizontal, and the drill 12 is positioned within the rotation angle range indicated by A only when the drill 12 is retracted. Therefore, when the limit switch 21 is turned off, the drill 12
(Auger device 10) can be judged to be in the retracted operation state.
That is, the limit switch 21 is used as a storage operation detecting means for detecting whether or not the auger device 10 is in the storage operation.

The second limit switch 22 is attached to the first boom 4a, and is turned on when the second and third booms 4b and 4c are completely retracted, that is, when the boom 4 is fully retracted, and is otherwise turned off. . That is, the limit switch 22
Is used as a boom total contraction detecting means for detecting whether or not the boom 4 is in a fully contracted state.

A drive control circuit of the auger motor 11 using these switches 21 and 22 is shown in FIG. The auger motor 11 is a hydraulic source
It is driven by hydraulic oil selectively supplied in accordance with the operation of the solenoid valve 25 and the manual valve 28 from 30.

The manual valve 28 is switched to three positions of right, center, and left according to the manual operation of the lever 28a, and at the right position (position shown in the figure), the hydraulic oil from the hydraulic source 30 passes through the hydraulic lines 31, 32, 33. Is supplied to the motor 11 and discharged to the drain through the hydraulic lines 34 and 35, and the motor 11 is normally rotated. On the other hand, in the left position, the flow of hydraulic oil is reversed and the motor 11 is reversed.
Is held stationary.

The solenoid valve 25 is arranged between the hydraulic lines 32 and 33, and when the solenoid 25a is in the energized and excited state, the solenoid valve 25 is in the state shown in the figure so that the hydraulic lines 32 and 33 are in communication. 25b is moved to the left to cut off the communication between the hydraulic lines 32 and 33. Therefore, when the solenoid 25a is energized, the auger motor 11 can be driven, but when the solenoid 25a is de-energized, the auger motor 1 is driven.
1 cannot be driven.

The solenoid 25a is connected to the power supply line 41 through the limit switches 21 and 22 and the control line 42, and the limit switch
Energization is controlled by the operation of 21,22. The first and second limit switches 21 and 22 are arranged in parallel. When either one of the switches is ON, or when both switches are ON, the solenoid 25a is excited and the auger motor 11 can be driven. Both switches are OFF
When, the auger motor 11 cannot be driven.

The operation of the control circuit having the above configuration will be described.

First, when the drill 12 is in the angle range shown by B in FIG. 3B and the drilling operation is performed by the drill 12, the first limit switch 21 is ON. Therefore, whether the boom 4 is fully retracted or extended, the solenoid 25a is excited, the auger motor 11 is in a rotatable state, and the manual operation 28
Thus, the rotation of the auger motor 11 is controlled, and the drill 12 carries out the digging work.

After that, in order to store the auger device 10, first, the extended second and third booms 4b and 4c are contracted to bring the boom 4 into a fully contracted state. As a result, the second limit switch 22 is turned on. In this state, both the first and second switches 21 and 22 are ON, and the auger motor 11 can be rotated. Therefore, the storage wire 9 is locked to the rod 12a to drive the auger motor 11 to rotate, and the auger device 10 can be rotated. Are stored as shown in FIG. 3B. As a result, when the drill 12 is rotated to the angle range indicated by A, the first limit switch 21 is turned off. However, since the second limit switch 22 is ON, the auger motor 11 can be rotationally driven, and this rotational drive causes the auger device 10 to move to the boom 4 as shown in FIG. 3C.
It is stored at a position along.

However, when the boom 4 is not fully retracted when the above-described storage is performed, the second limit switch 22 does not turn on but remains off. Therefore, the drill 12 is rotated to the angle range indicated by A, and the first limit switch 21 becomes OF.
When it becomes F, both limit switches 21 and 22 are turned off, and at this time, the solenoid valve 25 is used to set the hydraulic lines 32 and 33.
Is cut off and the drive of the auger motor 11 is stopped. That is, when the boom 4 is not fully retracted, even if the auger device 10 is tried to be retracted, the auger device 10 is stopped within a range indicated by A, and the retracting operation is blocked.

C. As described above, according to the present invention, when the boom full contraction detecting means detects that the boom is not in the fully contracted state, it is detected that the auger is in the process of being retracted. Since the storage operation regulation means regulates the storage operation of the auger, even if the auger is stored even when the boom is not in the fully retracted state, the storage regulation means operates and the storage of the auger is regulated. It is possible to prevent the stay and the like for supporting the auger from interfering with the auger and damaging the drill blade or the like of the auger when the auger is stored.

[Brief description of drawings]

FIG. 1 is a drive control circuit diagram of an auger motor acting as a safety device according to the present invention, FIG. 2 is a perspective view of a digging column vehicle equipped with an auger device, and FIGS. 3A to 3C and 4 are It is a side view of an auger device. 1 ... Digging column vehicle, 4 ... Boom 6 ... Stay, 7 ... Support member 10 ... Auger device, 11 ... Auger motor 12 ... Drill, 12a ... Rod 12b ... Blade, 13 ... Connecting member 21, 22 ... Limit switch 25 ... Solenoid valve, 28 ... Manual valve

Claims (1)

[Scope of utility model registration request] 1. A telescopic boom, an auger attached to the tip of the boom so as to be rotatable and rotatable with respect to the boom, one end attached to the boom and the other end locked to the auger. And a storage wire that has been stored, the auger is rotated by rotating the auger to wind the storage wire around the auger,
A safety device for storing an auger used in a digging device adapted to store the auger at a position along the boom, and a boom full contraction detecting means for detecting whether or not the boom is in a fully contracted state. When the boom is not in the fully retracted state, the retracting operation detecting means for detecting that the auger is in the retracting operation based on the rotation angle of the auger, A storage operation control means for restricting the storage operation of the auger when the storage operation detecting means detects that the auger is in the storage operation. Safety device for auger storage.