JP3453521B2 - Turn control device for digging pole cars - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of mounting a boom capable of turning, raising and lowering, expanding and contracting, etc. on a vehicle body, and suspending an earth auger device at the tip of the boom. The present invention relates to a work vehicle to which the vehicle is attached, that is, a work vehicle generally referred to as a digging column truck. 2. Description of the Related Art A digging column vehicle is provided with a turntable on a vehicle body,
A boom that can freely move up and down and attached is mounted on the swivel table, and an earth auger device is attached to the tip of the boom. This earth auger device has an auger screw attached to the end of the boom and extending downward from the end of the boom while being suspended from the end of the boom. Drilling. Such an earth auger device is generally composed of the auger screw, a hydraulic motor for rotating the auger screw, and the like, and is considerably heavy. Further, a bracket for mounting such an earth auger device as a whole at the end of the boom in a suspended state is also required.When the earth auger device is mounted at the end of the boom by hanging, a considerable weight acts on the boom end, The overturning moment acting on the vehicle body from the boom becomes large, and it is necessary to consider prevention of the vehicle from overturning. [0004] In order to prevent such a vehicle from overturning, for example, a so-called moment limiter used for aerial work vehicles, crane trucks and the like is used. It is conceivable to use a range control device. The moment limiter is used to measure or calculate a vehicle overturning direction moment that fluctuates according to the operation of the boom, and regulates the boom operation such that the moment exceeds a safety limit. However, in order to perform the regulation by the moment limiter, it is necessary to detect all the operation states of the boom and to detect the overturning moment, and furthermore, the control for restricting the operation of the boom based on these detection states is required. It is necessary, and there is a problem that a control device configuration is complicated and tends to be expensive. In view of the above problems, the present invention is based on the fact that an earth auger device whose weight is known in advance is hung at the end of a boom in a digging pole car, and the work is performed with as simple a structure as possible. It is an object of the present invention to provide a turning control device for a digging column car that can suppress the overturning moment acting on the vehicle at a time within a safe range. In order to achieve the above object, according to the present invention, there is provided a boom mounted on a vehicle body so as to be able to move up and down, turning, and the like, and a boom mounted on a tip of the boom. An earth auger device that performs excavation work, and an outrigger jack device that is disposed around the vehicle body and supports the vehicle body, a digging column vehicle is configured, and a turning control device of the digging column vehicle is Jack overhang amount detecting means for detecting an overhang amount of the outrigger jack in the vehicle width direction; jack operation detecting means for detecting a support state of the vehicle body by the outrigger jack; turning angle detecting means for detecting a turning angle of the boom; The vehicle is provided with a turning restricting means for restricting the turning operation and a turning alarm means for giving an alarm for the turning operation of the boom. [0007] In this digging column car, the boom is constructed so as to extend rearward on the vehicle body and to be retracted and stored. The turning control device uses the jack operation detecting means to move the outrigger jack to the vehicle body. Is detected, and when the overhang amount of the outrigger jack is detected to be within the minimum overhang range by the jack overhang amount detecting means, the first predetermined turning angle range including the rearward direction of the vehicle body. The swing operation of the boom is controlled by the swing restricting means.The jack operation detecting means detects that the outrigger jack is supporting the vehicle body, and the jack protruding amount detecting means minimizes the outrigger jack. When it is detected that the overhang is beyond the range, the first predetermined turning angle is determined. An alarm actuated by turning the warning means with respect to the pivot operation of the boom exceeding circumference. Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIGS. 1 and 2 show an example of a burrower equipped with a turning control device according to the present invention. This burrower has a driving cabin 2 in front of the vehicle.
Is constructed by mounting a digging column device 10 on a vehicle body 1 having The excavating column device 10 is provided on a revolving base 11 that is rotatably provided on the vehicle body 1 and is revolved and driven by a hydraulic motor (not shown), and is configured as follows. A support member 11a is provided upright on the swivel base 11, and a boom 12 is pivotally connected to the support member 11a so as to be able to move up and down. The boom 12 includes a telescopic base boom 12a, an intermediate boom 12b, and a distal boom 12c which are telescopically configured and extendable.
, And are telescopically operated by a built-in telescopic cylinder (not shown). The boom head 12 is provided at the tip of the tip boom 12c.
The hook 14a is suspended from the boom head 12d by a wire 14b. A winch device (not shown) is provided at a root portion of the boom 12, and the wire 14b is fed and wound by the winch device, and a lifting work of a utility pole or the like can be performed by the hook 14a. Proximal boom 12a and distal boom 12c
Auger bracket 21 that can be selectively coupled to boom 1
The auger bracket 2
1, an earth auger device 20 is attached. The earth auger device 20 includes a connecting rod member 22 pivotally connected to an auger bracket 21, an auger driving device 23 attached to a distal end of the connecting rod member 22, and an auger screw 24 driven to rotate by the auger driving device 23. Be composed. The auger driving device 23 has a hydraulic motor, and rotates the auger screw 24 in response to hydraulic pressure supplied from the vehicle body. When the earth auger device 20 is used, the auger bracket 21 is connected to the tip boom 12c, and the entire auger device 20 is moved to a desired position according to the extension and contraction of the tip boom 12c. On the other hand, when the earth auger device 20 is not used, the auger bracket 21 is coupled to the base boom 12a, and the earth auger device 20 is stored and held at a position along the side of the base boom 12a. In this state, hanging work by the hook 14a is possible. An operation console 30 is provided upright in front of the swivel 11 immediately after the driving cabin 2 in the vehicle body 1. The work operation table 30 includes a chair 31 on which an operator M sits, and an operation device 32 located in front of the chair 31. The operator M sitting on the chair 31 operates an operation lever 33 of the operation device 32 and the like to be described later. Perform various operation operations. The operating device 32 is also provided with instruments 34 for performing various displays. Further, outrigger devices 40 for supporting the vehicle body 1 at the time of work are provided at four front, rear, left and right positions of the vehicle body 1. Each outrigger device 40 includes an outrigger beam 41 that extends in the vehicle width direction and is attached to the vehicle body, and an outrigger jack 45 that extends downward and is attached to the tip of the outrigger beam 41. The outrigger beam 41 is composed of a beam box fixed to the vehicle body and a beam rod arranged to be extendable and retractable in the beam box. An outrigger jack 45 is attached to the tip of the beam rod, and the beam rod is moved to the beam box. By expanding and contracting, the outrigger jack 45 can be extended outward from the position where the outrigger jack 45 is stored on the side of the vehicle body, as shown by a chain line in FIG. The outrigger jack 45 includes an outer post 46 connected to the tip of the beam rod, an inner post 47 built in the outer post 46 and capable of extending and contracting downward, and a ground plate attached to the lower end of the inner post 47. 48. For this reason, the inner post 47 is extended downward by the built-in hydraulic cylinder to
And the vehicle body 1 can be supported. The operation of the digging and pillar apparatus 10 having the above-described structure, for example, the turning operation of the swivel base 11, the raising and lowering and expanding / contracting operation of the boom 12, the operation of the winch device, and the operation of the auger driving device are provided on the vehicle body. This is performed by driving a hydraulic actuator (hydraulic motor, hydraulic cylinder, etc.) by supplying hydraulic pressure from a hydraulic drive source (not shown). For this reason, a plurality of control valves for controlling the supply of the hydraulic pressure are provided on the vehicle body, and the operation of the control valves is controlled by the worker M sitting on the chair 31 of the work operation table 30 operating the operation lever 33 and the like. It is done. [0016] Such an operation will be briefly described.
Before the operation, the boom 12 is stored on the vehicle body 1 in a contracted state and extends obliquely downward and rearward of the vehicle body as shown by solid lines in FIGS. 1 and 2. At this time,
The earth auger device 20 extends along the side of the boom 12 in the reduced state and is stored and held, and the boom 12 is placed on the boom rest 5. Before starting each work, the outrigger device 40 supports the vehicle body by the outrigger jack 45, and the following work is performed with the outrigger device 40 supporting the vehicle body. First, when a work of lifting a utility pole or the like by the hook 14a (a crane work) is performed, the auger bracket 21 is connected to the base end boom 12a and stored and held. In this state, the boom 12 is raised and lowered, and the telescopic operation is performed.
The boom head 12d at the tip of the tip boom 12c is moved to a desired position, and a lifting operation is performed using the hook 14a suspended from the boom head 12d. On the other hand, when excavating a pole hole by the earth auger device 20, the auger bracket 21 is connected to the tip of the tip boom 12c. Further, the earth auger device 20 is suspended from the distal end of the distal end boom 12c as shown by a chain line in FIG. Then, after raising and lowering and extending and retracting the boom 12 and rotating the swivel 11, the earth auger device 20 suspended from the tip of the tip boom 12 c is moved to a desired position. The auger screw 24 is rotated to excavate the pole hole. When the earth auger device 20 is excavated as described above, the earth auger device 20 has a considerable weight, and depending on the position of the boom 12, the overturning moment acting on the vehicle body is increased, and the outrigger is operated. The support of the vehicle body by the device 40 may become unstable. For this reason, a turning control device for regulating and controlling the turning range of the boom 12 when working with the earth auger device 20 is provided, which will be described with reference to FIG. As shown in FIG. 3, the turning control device includes a total of four turning position detecting switches (limit switches) 51a to 51d (turning angle detecting means) for detecting the turning angle of the turntable 11, and an outrigger device 40. Four overhang position detection switches (limit switches) 52a, 52b, 53 for detecting the overhang amount of the outrigger beam 41
a, 53b (jack protrusion amount detecting means) and an operation detector 54 for detecting an operation state of the outrigger jack 45
a, 54b (jack operation detecting means). Although only one outrigger device 40 is shown in FIG. 3, two outriggers 40 are actually provided before and after the vehicle as shown in FIG. 2, each having the same configuration as FIG. 3. . The turning position detection switches 51b and 51c are
It is turned on when the boom 12 turns 30 ° from the turning position of the turning table 11 in the state of facing immediately afterward (assuming the turning angle is 0 ° at this position) by 30 °, and detects this. On the other hand, the turning position detection switches 51a and 51d are turned on when the turntable 11 turns left and right by 70 °, respectively, to detect this. Then, these detection signals (ON signals) are input to the controller 50. Overhang position detection switches 52a, 52
b, 53a, 53b are the outrigger beams 41, respectively.
The overhang amount (ie, the overhang position of the outrigger jack 45) is within the minimum overhang range, the middle overhang range, or the maximum overhang range. The switches 52a and 53a are turned on when the switch is OFF and within the middle overhang range, and all switches are turned on when the switch is within the maximum overhang range. Also, the operation detector 54
A and 54b detect whether or not the inner post 47 of the outrigger jack 45 is extended and the vehicle body is completely supported. Then, these detection signals are also input to the controller 50. The controller 50 outputs a regulation signal to the operation control solenoids 56a and 56b of the swing control hydraulic valve (not shown) based on the detection signal input as described above, and outputs an alarm lamp 57 and an alarm buzzer 58. Or output an operation signal to the This will be described below. The turning control hydraulic valve is a solenoid operated type hydraulic valve, and its operation is basically controlled in accordance with the operation of the operation lever 33 (the turning operation lever) by the operator M. First, when the outrigger jack 45 is within the minimum overhang range, if the boom 12 is largely turned to the side of the vehicle body, the support by the outrigger device 40 becomes unstable. 0
(The position of (°)) to the left and right within a turning angle range (first predetermined turning angle range) within 30 °. On the other hand, when the outrigger jack 45 is within the intermediate overhang range, the boom 1
Since the stability can be ensured even when the vehicle 2 is turned to the side of the vehicle to a certain extent, the turning angle is restricted within a turning angle range of 70 ° left and right (a second predetermined turning angle range). When the outrigger jack 45 is within the maximum overhang range, the stability can always be ensured, so that the turning is not restricted. For this reason, the overhang position detection switch 52
a, 52b, 53a, 53b that the outrigger jack 45 is within the minimum overhang range by the detection signals from the operation detectors 54a, 54b, and that the vehicle body is completely supported by the outrigger jack 45 by the detection signals from the operation detectors 54a, 54b. When it is determined, the controller 50 outputs a regulation signal to the operation control solenoids 56a and 56b when the turning angle of the turning table 11 detected by the turning position detection switches 51b and 51c reaches 30 ° in each of the left and right directions. And restrict further turning operation. At the same time as this regulation, the alarm lamp 57 is turned on and the alarm buzzer 58 is sounded. Overhang position detection switches 52a, 52
b, 53a, 53b, it is determined that the outrigger jack 45 is within the middle overhang range, and the detection signals from the operation detectors 54a, 54b indicate that the vehicle body is completely supported by the outrigger jack 45. In this case, the controller 50 turns on the alarm lamp 57 and sounds the alarm buzzer 58 when the turning angle of the turntable 11 detected by the turning position detection switches 51b and 51c reaches 30 ° on each of the right and left sides. The worker M is notified that there is not much stability. However, at this time, the turning operation of the boom 12 is possible without performing the turning control, and when the turning angle of the turntable 11 reaches 70 ° in each of the left and right directions by this turning, a control signal is output to the operation control solenoids 56a, 56b. Then, further turning operation is restricted. Overhang position detection switches 52a, 52
It is determined that the outrigger jack 45 is within the maximum overhang range by the detection signals from b, 53a, and 53b, and that the vehicle body is completely supported by the outrigger jack 45 by the detection signals from the operation detectors 54a and 54b. In this case, the controller 50 turns on the alarm lamp 57 and sounds the alarm buzzer 58 when the turning angle of the turning table 11 detected by the turning position detection switches 51b and 51c reaches 70 ° on each of the left and right sides. The worker M is notified that there is not much stability. However, in this case, the turning operation of the boom 12 can be performed without turning control. By performing the above-described turning operation restriction, the turning operation that impairs the stability of the vehicle body due to the outrigger device 40 when drilling work using the earth auger device 20 is prevented beforehand, and the safety is improved. Nature can be secured.
Moreover, in this case, the device configuration is extremely simple, and the device cost is low. Note that the turning angles 30 ° and 70 ° used as criteria for performing the regulation and the warning as described above are exemplary numerical values, and include the size, weight, center of gravity position, and outrigger width of the vehicle. It is variably set according to the above. Further, in this example, the turning position of the swivel table and the overhanging position of the outrigger beam are detected using the limit switch. However, even if the turning angle and the amount of overhang are detected by using a device that continuously detects these. good. As described above, according to the present invention,
A turning control device includes a jack overhang amount detecting means, a jack operation detecting means, a boom turning angle detecting means, a boom turning restricting means, and a boom turning alarm means, and the outrigger jack supports the vehicle body. When it is detected that the overhang amount of the outrigger jack is within the minimum overhang range, the swivel operation of the boom exceeding the first predetermined swivel angle range including the rearward direction of the vehicle body is restricted by the rotation restricting means. If the outrigger jack is in a state of supporting the vehicle body and it is detected that the outrigger jack extends beyond the minimum overhang range, the boom of the boom exceeding the first predetermined turning angle range is detected. An alarm operation is performed by the turning alarm means for the turning operation. Body supporting by it is possible to obtain a rotation control device for regulating the turning operation as unstable.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a digging column car having a turning control device according to the present invention. FIG. 2 is a plan view of a digging column car having a turning control device according to the present invention. FIG. 3 is a block diagram showing a configuration of a turning control device according to the present invention. [Description of Signs] 11 Turning table 12 Boom 20 Earth auger device 23 Auger drive device 24 Auger screw 30 Work operation table 33 Operating lever 40 Outrigger device 41 Outrigger beam 45 Outrigger jack 50 Controller

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeya Suzuki 1015-2 Yamashita, Ryoke, Ryoke, Ageo-shi, Saitama Prefecture Aichi Corporation Ageo Factory (56) References JP-A-9-316932 (JP, A) Japanese Utility Model Application Hei 3-62185 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02F 9/24 E21B ^7/ 00-15/00

Claims (1)

(57) [Claim 1] A boom which is mounted on a vehicle body so as to be able to freely move up and down, turns, etc., an earth auger device which is mounted on a tip of the boom and performs excavation work, An outrigger jack device disposed around the vehicle body and supporting the vehicle body, comprising: an operation control device for a digging column vehicle, wherein a jack protrusion amount detection device detects a protrusion amount of the outrigger jack in a vehicle width direction. Means, jack operation detecting means for detecting a support state of the vehicle body by the outrigger jack, turning angle detecting means for detecting a turning angle of the boom, turning restricting means for restricting the turning operation of the boom, and the boom Turning alarm means for issuing an alarm for turning operation of the vehicle, wherein the boom is configured to extend rearward of the vehicle, fall down, and be stored on the vehicle body. That is, the jack operation detecting means detects that the outrigger jack is supporting the vehicle body, and the jack protrusion amount detecting means has a protrusion amount of the outrigger jack within a minimum protrusion range. When it is detected, the first
The turning operation of the boom exceeding a predetermined turning angle range is restricted by the turning restricting means, and the jack operation detecting means detects that the outrigger jack is supporting the vehicle body, and the jack extension amount. When the detecting means detects that the outrigger jack extends beyond the minimum overhang range, the turning alarm means activates an alarm for the turning operation of the boom exceeding the first predetermined turning angle range. A turning control device for a digging column car, which performs the following.