JPS5926894A - Turning type service car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The Kiha F3A relates to various work vehicles equipped with a swivel platform, such as a swivel-type bank hook or a crane, and its purpose is to easily and reliably prevent the swivel platform from being accidentally hit. The objective is to prevent this from happening, and to enable work to be carried out efficiently in such a safe state.

The #r rotation type work vehicle was built using the Kihatsu F3A, and a non-contact sensor was installed on the swivel platform to measure the distance between the rear end corner and an obstacle that exists within the turning range of this rear end corner. At the same time, an alarm device is installed that automatically activates when the distance measured by the rlrJ sensor becomes less than the set value,
Based on the information from the turning speed detection device of the turning table, i
[■The turning speed is increased for the set pupil/1! , is located in a city that has a device that allows you to change and set your own III so that it becomes larger.

It is now possible to easily make the operator aware that the swivel platform is about to collide. Moreover, the swivel base was close to colliding with
tJ is detected by a non-contact sensor, such as when a stopper for limiting the rotation angle of a swivel base is provided so that its operating position can be adjusted according to the distance between the swivel base and an obstacle. There is no risk of forgetting to adjust and causing a collision, and there is no need to take the trouble of adjusting.

Furthermore, as the swivel base approaches an obstacle, the timing at which the warning device starts operating is more likely to occur between the swivel base and the 1qL hazard/object when the swivel base drive speed is fast than when it is slow. Since the distance is automatically adjusted to be large, during high-speed operation, even if the swivel base is stopped, it cannot be rotated very close to the obstacle due to dynamic inertia, and the swivel It is now possible to prevent the range from becoming narrower without incurring the trouble of adjusting the alarm device activation timing. As a result, it is possible to easily and reliably prevent the swivel base from being unexpectedly collided with, and to efficiently perform work in safety state 1a by rotating the swivel base over as wide a range as possible. Embodiments of the present invention will now be described with reference to the drawings.

As shown in FIG.
The swivel base (5) having a drive unit (4) is increased to allow full rotation operation, and a puncture hook working device (6) is installed at the n11 end of the swivel base (5) using a hydraulic cylinder (7). The bracket (8), which can be freely swung, is used to extend the number of copies so that the orientation can be freely changed around the vertical axis, and constitutes a work force that can perform dozer work and back-and-forth work alternatively.

As shown in FIG. 2, the left rear end corner (
5a) or a transmitting unit (9) that transmits ultrasonic waves to the turning ntsyJ of the right rear end corner (5b);
) or (5b), the ultrasonic sensor (lla
) or (llb) are attached to the left and right sides of the swivel table (51), and an alarm scissor q2 is installed on the operating section (31), and based on the information from the sensors V-(lla) and (llb), When the rear end corner (5a) or (5b) of the swivel table approaches an obstacle (Al), the control mechanism (13 to alarm!7'-02) automatically operates the alarm scissors 07J.
), so that if the swivel base (5) is about to collide with an obstacle (5) as it rotates, the operator can easily recognize this with a warning buzzer (12). This structure allows work to be carried out while easily avoiding collisions with the swivel table.

The control mechanism +131 (1) consists of a device (14a) that controls the transmission so that the transmitter (9) transmits ultrasonic waves at set time intervals as shown in FIG.
J or (14b), a device f (15a) or (15b) that measures the time from when the transmitter (9) transmits one wave until the receiver (101 receives the sound wave) (15a) or (15b), and Time measurement device (15a) or (15b) A device (16a) or (II
3b) nts left and right sensors (lla), (l
lb), and the distance calculation device (16
a) and (16b) The distance calculated by K and the set value by the setter 1171 of the approach distance to the obstacle place at the rear end corner of the swivel table (5a) and (5b) are set by the flJ separate device (1
8) and compare the calculated distance with the set value for calculation.
It is determined whether L is less than or equal to the set distance, and when it is determined that the calculated distance is less than or equal to the set value, the buzzer operation circuit t1
9) A K buzzer activation signal should be given.

As shown in FIG. 4, the operating lever t of the swivel base (5)
20) K, a switch (21a) for detecting that it is in the left turning operation position L), and a switch (21a) that detects that it is in the left turning operation position @(
What is the role of each switch (21b) for detecting presence in a river, and also the function of the buzzer operation circuit (19) for both switches (21a) and (21b)? When both are in the non-detection state, the ratio v1! By linking the scissors 03 to a state where it is stopped in priority to the signal from the IJ separate device t18), the control mechanism (Group by IJ) is activated only when the turning operation of the swivel base (5) is being performed. By configuring it so that the buzzer (121) can be activated when the swivel table (51) is stopped rotating, consideration has been given to preventing the buzzer (121) from being activated unnecessarily. .

As shown in FIG.
A pulse oscillator +241 is installed in the movable groove of the swivel base W1, which is attached to the swivel base so that it can be driven freely by a fluid pressure motor (not shown), so as to generate pulses as the swivel base rotates, and as the swivel base rotation speed changes. Accordingly, the oscillation speed is linked so that it changes in proportion to the rotation speed, and the number of oscillation pulses from the IQ recording oscillator device is measured at set time intervals. A device (support) for calculating the rotation speed of the swivel base (5) is attached to each of the pulse oscillation type devices, and the rotation speed of the swivel base (5) is detected based on the drive rotation speed of the pinion gear. This is a turning speed detecting device array configured to perform the following steps.

The setting device (17) is configured to be a variable setting device, and the setting value is set to be larger as the turning speed increases based on information from the turning speed detecting device (271). The alarm buzzer (1 at the rear corner of the swivel base (5a) when the swivel base (5) starts to operate) is linked so that the settings are automatically changed and the rotation speed of the swivel base (5) increases.
Or, the timing at which the alarm buzzer (12) starts operating is automatically changed and adjusted as the turning speed is changed so that the distance between (5b) and the obstacle (5) is increased. It is composed.

The above-mentioned measurement of the distance Nr and turning speed, as well as the generation of buzzer operation signals and change of set values based on these measurements, may be performed by a microcomputer or may be configured to be performed by a logic circuit. .

Said sonic sensor (lla), (instead of (flb), electric (
Sensors that transmit and receive true waves may be used.In general, any sensor that can measure the distance to an obstacle without contacting it may be used.
, 1a), and (flb).

The alarm buzzer () 71 can be changed to a device for reproducing a sound recorded on a tape in advance, an alarm lamp, etc., and these are collectively referred to as an alarm device (12).

[Brief explanation of the drawing]

The drawings show the implementation of the swing-type work vehicle according to the present invention, and the first
The figures are an overall side view, FIG. 2 is a plan view of the Vi swivel table, FIG. 8 is a plan view of the swivel table drive mechanism, and FIG. 4 is a block diagram. (5)... Swivel base, (5a), (5b)...
...Rear end corner, (]lla, (llb)...
CE≧Ser, (1z... Alarm device, (171...
... Setting device, (5) ... Obstacle.

Claims (1)

[Claims] - A tool for measuring the distance ~L between the rear end corners (5a), (5b) and the obstacle placed within the turning range of the rear end corners (5a), (5b) on the swivel base (51) Contact sensor y −
(lla) and (llb) are attached, and the sensor (lla) and (llb) are attached.
a) and (llb), which automatically operates when the distance measured by A swing-type working vehicle characterized by being provided with a device U71 that automatically changes and sets a set value so that it increases as the swing speed increases.