JPH0530526Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) This invention relates to an improvement of a reversing warning device for an all-terrain crane vehicle.

(Prior art) An all-terrain crane vehicle in which a crane is mounted on the loading platform of a carrier and can be operated and operated not only in the driver's cabin of the truck but also in the operator's cabin of the crane (Utility Model Publication No. 12878/1987) In such cases, the third
The one shown in the figure is known.

1 is a shift tower for a transmission (for example, 6 forward speeds and 3 reverse speeds) installed in the driver's cab 2 of the truck and 3 in the operator's cabin 4 of the crane. Each shift tower 1, 3 has a shift lever 5, Switches 7 and 8 are provided for detecting the select position of 6. The switches 7 and 8 connect the shift levers 5 and 6 (with insulation coating except for the contact points) to the battery 10 via the changeover switch 9, and also connect the shift towers 1 and 6 to the battery 10 via the changeover switch 9.
It is constructed by arranging metal plates 7 and 8 that come into contact with the contacts on the levers 5 and 6 when the shift levers 5 and 6 are inserted into the forward and reverse side gates of the shift lever 3.

Of these, the metal plates 7A and 8A on the reverse side are connected to the reverse lamp 13 and the reverse buzzer 14 via diodes 11 and 12, respectively, and are connected to the shift lever 1 or 3 on the side where the changeover switch 9 is turned on.
When the vehicle is put into reverse, a reverse lamp 13 and a reverse buzzer 14 are activated.

(Problem to be solved by the invention) By the way, in crane trucks equipped with such a reverse warning device, when the crane is traveling on-tire, the cockpit is often directed toward the rear of the vehicle together with the crane. Since the direction of the cockpit is opposite to that of the vehicle, the reverse lamp and buzzer will operate even when driving forward of the cockpit in this condition, and the reverse buzzer will sound from beginning to end during crane work. The problem was that it was noisy and bothersome.

(Means for solving the problem) In order to solve this problem, this invention
In an all-terrain crane vehicle that can be operated from the crane's cockpit in addition to the truck's driver's cab, the shift lever is placed in reverse on the transmission shift tower installed in each of the driver's cab and cockpit. Install a switch that closes when
Each switch is connected to the power source via a changeover switch, while the switch on the driver's cab side is connected in parallel to the reverse lamp and the backward buzzer, and the switch on the cockpit side is connected only to the reverse lamp.

(Function) According to this, when operating the crane by putting the shift lever in reverse in the cockpit, the reversing buzzer will not sound and only the reversing lamp will turn on, allowing the crane to be operated quietly. It can be carried out.

(Example) In FIG. 1, 20 is in the driver's cab 21 of the truck,
Further, 22 is a shift tower disposed in the cockpit 23 of the crane, and each shift tower 20, 22 is provided with switches 26, 27 for detecting the select position of the shift levers 24, 25, as before.
Switches 26 and 27 are shift levers 24 and 25
(with insulation coating except for the contact portion) is connected to the battery 30 via the changeover switch 28, and
a metal plate 31 that comes into contact with the contacts on the levers 24 and 25 when the shift levers 24 and 25 are inserted into the forward and backward gates of the shift towers 20 and 22;
32.

Then, the reverse side metal plate 3 on the driver's cab 21 side
1A is connected to the reverse lamp 36 via the diode 33.
is connected in parallel to the reverse buzzer 37, while the reverse side metal plate 32A on the cockpit 23 side is connected only to the reverse lamp 36 via the diode 34.

With this configuration, the crane cockpit 23
When operating the vehicle with the shift lever 25 in the reverse position, the reverse buzzer 37 will not sound and only the reverse lamp 36 will turn on, even when driving with the direction of the cockpit 23 reversed to the direction of the vehicle. Become,
Therefore, crane work can be carried out quietly.

FIG. 2 shows another embodiment, in which
Shift tower 2 on the driver's cab 21 side and cockpit 23 side
A relay 40 is installed to switch the forward and reverse circuits of 0 and 22, and the contact 3 of this relay
8 and 39 are designed to operate in conjunction with the changeover switch 28.

(Effects of the invention) In summary, according to this invention, in an all-terrain crane vehicle that can be driven and operated not only from the driver's cab of the bogie but also from the crane's cockpit, a transformer installed in each of the driver's cab and the cockpit is used. Mitsubishi's shift tower is equipped with a switch that closes when the shift lever is put into reverse, and each switch is connected to the power source via a changeover switch, while the switch on the driver's cab side is connected in parallel to the reverse lamp and the reverse buzzer. In addition, the switch on the cockpit side was connected only to the reverse lamp, so the reverse buzzer would not sound even when driving with the cockpit facing the opposite direction of the vehicle. Only the reversing lamp is turned on, so the crane operation can be carried out quietly.

[Brief explanation of the drawing]

Figure 1 is a circuit diagram showing an embodiment of this invention, Figure 2 is a circuit diagram showing an embodiment of this invention.
The figure is a circuit diagram showing another embodiment, and FIG. 3 is a circuit diagram showing a conventional technique. 20, 22... Shift tower, 21... Driver's cabin, 23... Control room, 24, 25... Shift lever, 26, 27... Select position switch, 28
...Selector switch, 30...Battery, 36...
Reverse lamp, 37...Reverse buzzer.

Claims (1)

[Scope of utility model registration request] In an all-terrain crane vehicle that can be operated from the crane's cockpit in addition to the truck's driver's cab, the shift lever is placed in reverse on the transmission shift tower installed in each of the driver's cab and cockpit. Each switch is connected to the power source via a changeover switch, while the switch on the driver's cab side is connected in parallel to the reverse lamp and the reverse buzzer, and the switch on the cockpit side is connected to the reverse lamp and the reverse buzzer. A reversing warning device for all-terrain cranes, characterized in that it is connected only to.