JPH1067497A - Interference alarming device for boom type working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce noise to give no unpleasant feeling to an operator by preventing generation of alarm by interference alarming means when a structure on the side of a boom is in a retracted state. SOLUTION: Since a structure on the side of a boom which is in a retracted state, at the time of start of operation, is so close to a structure on the side of a vehicle that there is a danger of interference, posture detection means 20 detects it, and according thereto comparison means 26 determines that entering in an interference danger region stored in danger region storing means 25 is made, then a danger informing signal is output. In this condition, however, since a boom rest supports a lower surface of the boom, the retracted condition of the boom is detected by boom retract condition detection means 32 and a length detector 23 and the retracted condition of a platform is detected by a turning position detector 24. Then, alarm generation preventing means 33 works when retract condition detection means 31 detects the retracted condition while the comparison means 26 outputs the danger informing signal prevents generation of alarm from interference alarm means 27. Similar operation is made when the structure on the side of boom is in the retracted posture in the case of retracting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interference warning device for a boom type working vehicle having a swivel that can be turned on a vehicle and a boom that can be raised and lowered on the turntable.

[0002]

2. Description of the Related Art A boom-type work vehicle includes an aerial work vehicle, a mobile crane vehicle and the like. FIG. 2 shows an overview of the aerial work vehicle A.

An aerial work vehicle A includes an outrigger 2 attached to a vehicle 1, a swivel 3 driven by a swivel hydraulic motor 7 on the vehicle 1, and an up / down hydraulic cylinder 8 on the swivel 3. A boom 4 that is driven to extend and retract by a hydraulic cylinder 9 that can be raised and lowered, a bracket 5 that is attached to the tip of the boom 4 so as to be raised and lowered, and that is driven by a leveling cylinder 10 to maintain its upper surface horizontal. Hydraulic motor 11 for horizontal rotation
The platform 6 is configured so as to be rotatable by the robot.

[0004] The structures on the boom side are these booms 4,
Bracket 5, platform 6, undulating hydraulic cylinder 8, telescopic hydraulic cylinder 9, leveling cylinder 10,
1 shows a turning hydraulic motor 11 and the like.

The structures on the vehicle side include a vehicle 1, an outrigger 2, a boom rest 13, which will be described later, and a tool box (not shown).

[0006] The platform 6 is provided with an operating device 12 capable of operating the swivel of the swivel 3, the up and down movement of the boom 4, the expansion and contraction, the swivel of the platform 6, and the like. Operation device
12 is provided at a single location or a plurality of locations on the platform 6, the swivel 3 and the vehicle 1.

[0007] A boom rest 13 is provided on the vehicle 1 so as to support the lower surface of the boom 4 in a retracted posture as shown in FIG. 2 so that the boom 4 is fixed. .

When working at heights using the aerial work vehicle A, the operating device 12 is operated to install the outrigger 2. Subsequently, the operating device 12 is operated to elevate the boom 4, and thereafter, the operation is performed by appropriately operating the swiveling of the swivel 3, the up and down movement of the boom 4, the expansion and contraction, and the turning of the platform 6.

When the work at a height is completed, the storage position is returned to the storage position as shown in FIG. 2, but the turning position of the platform 6, the telescopic position of the boom 4, and the turning position of the turntable 3 are set to the storage positions, and thereafter the boom By causing the boom rest 13 to fall down and to be supported by the boom rest 13, the structure on the boom side is in the retracted posture. Then, if the outrigger 2 is stored, the aerial work vehicle A is in the storage posture.

Further, the aerial work vehicle A is provided with an interference alarm device B for notifying the danger of interference between the boom-side structure and the vehicle-side structure. The interference alarm device B includes a posture detecting means 20 for detecting a posture of the boom-side structure, a danger area storage means 25 for storing an interference danger area where there is a danger of interference between the boom-side structure and the vehicle-side structure. ,
Comparison means 26 which compares the detection value of attitude detection means 20 with the value stored in danger area storage means 25 and outputs a danger signal when a structure on the boom side has entered the danger area of interference, receives the danger signal Then, an interference alarm means 27 for issuing an alarm is provided.

The attitude detecting means 20 includes a turning angle detector 21 for detecting the turning position of the turntable 3, an undulating angle detector 22 for detecting the undulation angle of the boom 4, and a length for detecting the extension length of the boom 4. And a turning position detector 24 for detecting the turning position of the platform 6.

Since the interference warning device B is configured as described above, when the boom-side structure enters an interference danger area where there is a danger of interference with the vehicle-side structure, the posture of the boom-side structure is changed. The detection signal of the attitude detection means 20 that detects the intrusion is judged by the comparison means 26 to have entered the danger area of interference stored in the danger area storage means 25, and the danger signal is output. Raise an alarm.

[0013] Since the danger of interference is notified to the operator,
The machine is easy to use without forgetting to take care that the operator does not interfere.

[0014]

A conventional interference warning device B
In an aerial work vehicle A in which the structure on the boom side is so close to the vehicle-side structure in the retracted position that there is a danger of interference, even if the structure on the boom side is in the retracted position, the interference alarm device B Had been alerting.

That is, an alarm starts when the power of the interference alarm device B is turned on in order for the aerial work vehicle A to perform an aerial work, and continues to warn at least until the boom 4 is raised from the stowed posture. . Also, when the high-altitude work is completed and stored, the alarm is kept on for the same period as when the high-altitude work is started.

[0016] During such a time, noise is noisy because the boom-side structure does not move, it is a relatively continuous long time, and the operator recognizes that it is in the storage position. It is also unpleasant.

An object of the present invention is to prevent the occurrence of an alarm in such a situation.

[0018]

In order to solve the above-mentioned problems, an interference warning device for a boom type working vehicle according to the present invention is different from the conventional interference warning device B in that the structure on the boom side is different from the structure on the vehicle side. When a danger signal is output as if the vehicle has entered a danger area where there is a danger of interference, if it is detected that the boom-side structure has been retracted, the alarm is blocked.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An interference alarm device for a boom type working vehicle according to the present invention is a conventional interference alarm device B which includes storage detecting means for detecting that a boom-side structure is stored, and interference alarm means. An alarm blocking means for blocking an alarm is provided, and when the storage detecting means detects storage while the comparing means is outputting the danger signal, the alarm blocking means is activated.

[0020]

FIG. 1 is a block diagram showing an interference alarm device C for a boom type working vehicle according to the present invention. The interference alarm device C for a boom type working vehicle according to the present invention is characterized in that a part of the means is added to the conventional interference alarm device B. Therefore, the conventional technology will be described with reference to FIGS. Signs 1-27 are
The description is omitted and used in the following description as synonyms.

Reference numeral 31 denotes storage detection means, 32 denotes boom storage detection means, and 33 denotes alarm prevention means. Storage detection means 31
Is a means for detecting that the boom-side structure has been stored, and a boom storage detecting means for detecting storage of the boom.
32, a length detector 23 and a turning position detector 24. The alarm blocking means 33 is a means for blocking the warning of the interference warning means 27, and operates when the storage detecting means 31 detects storage while the comparing means is outputting the danger signal.

The operation will be described. When working at heights using the aerial work vehicle A, the operating device 12 is operated,
The outrigger 2 is installed. Subsequently, the operating device 12 is operated to elevate the boom 4, and thereafter, the operation is performed by appropriately operating the swiveling of the swivel 3, the up and down movement of the boom 4, the expansion and contraction, and the turning of the platform 6.

In the aerial work vehicle A, since the boom-side structure is close enough to the vehicle-side structure in the stowed state of the boom-side structure, the detection signal of the posture detecting means 20 The comparison means 26 determines that the intrusion has entered the interference danger area stored in the danger area storage means 25, and outputs a danger signal. In this state, since the boom rest 13 supports the lower surface of the boom 4, the boom storage detecting means 32 and the length detector 23 store the boom, and the turning position detector 24.
Has detected that the platform 6 has been stored. Therefore,
The storage detecting means when the comparing means 26 outputs the danger signal
Alarm blocking means 33 that is activated when 31 detects storage,
The alarm of the interference alarm means 27 is blocked.

When the aerial work vehicle A is retracted after finishing the aerial work, the same operation is performed when the boom-side structure is in the retracted posture.

As described above, while the alarm blocking means 33 blocks the warning of the interference warning means 27, it means that the structure on the boom side does not move, that it is a relatively continuous long time, and that the operator Since it is recognized that the user is in the storage posture, the effect of reducing noise is large and the user does not feel uncomfortable.

In the above description, the comparison means 26 outputs a danger signal when it is determined that the detection signal of the attitude detection means 20 has entered the interference danger area stored in the danger area storage means 25. However, a preventive area is provided before reaching the interference risk area, and the detection signal of the posture detecting means 20 is provided in the preventive area,
It is also possible to determine that the vehicle is on, output a signal for performing an interference forecast, and cause the interference warning means 27 to generate a forecast.

Although the danger area storage means 25 has been described as directly storing an interference danger area, for example, the danger area storage means 25 may be configured to store an outer line of the vehicle 1 and add or subtract a predetermined interval value.

Further, in the above description, the boom storage detection is performed by the boom storage detection means 32 and the length detector 23. However, the boom storage detection means 32 controls the turning position of the swivel base 3 and the boom 4 The slewing angle detector 21 and the sway angle detector 22 may be configured to detect the sway angle to detect the predetermined boom posture.

The turning angle detector 21, the undulation angle detector 22, the length detector 23, and the turning position detector 24, which constitute the attitude detecting means 20, are already provided for a fall prevention device in a boom type working vehicle. May be used.

Further, in the above description, the alarm blocking means 33
Is determined to operate when the storage detecting means 31 detects the storage while the comparing means 26 outputs the danger signal,
The operation of the operating device 12 may be detected, and when the operation is detected, the operation of the alarm blocking unit 33 may be canceled.

Further, if it is determined that a shift within a predetermined range may be permitted in a combined operation such as vertical linear movement or a boom laying down operation, an alarm such as full boom contraction may be prevented.

[0032]

According to the interference alarm device for a boom type working vehicle of the present invention, when the boom-side structure is in the retracted position, the alarm by the interference alarm means is blocked, so that the noise reduction effect is great and This will not make the operator feel uncomfortable, and is highly effective for environmental improvement and safety.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an interference warning device for a boom type working vehicle according to the present invention.

FIG. 2 is an explanatory diagram showing an overview of an aerial work vehicle.

FIG. 3 is a block diagram showing a conventional interference warning device for a boom-type work vehicle.

[Explanation of symbols]

 20 Attitude detection means 25 Danger area storage means 26 Comparison means 27 Interference alarm means 31 Storage detection means 33 Alarm prevention means A Work platform aerial B, C Interference alarm device

Claims (1)

[Claims] A swivel that is pivotally mounted on a vehicle;
An attitude detection means for detecting the attitude of the boom-side structure, including a boom mounted on the turntable so as to be able to move up and down, and an interference risk area where there is a danger of interference between the boom-side structure and the vehicle-side structure Comparing the detection value of the posture detection means with the value stored in the danger area storage means, and outputting a danger signal when a boom-side structure has entered the interference danger area. Means, and an interference alarm device for a boom-type work vehicle, comprising: an interference alarm device that issues an alarm when a danger signal is received, wherein the storage detection device detects that the boom-side structure has been stored, An alarm blocking means for blocking an alarm of the interference warning means is provided, and when the storage detecting means detects storage while the comparing means is outputting the danger signal, the alarm blocking means is activated. Features Boom type work vehicle interference warning device.