JP2002060200A - Alarm device for natural gas type forklift truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inform an operator of fuel shortage by providing a timer switch, an alarm lamp and an alarm buzzer, and automatically making the alarm lamp and the alarm buzzer raise the alarm of the fuel shortage when a preset prescribed time lapses. SOLUTION: This alarm device for a natural gas type forklift truck operating with natural gas as fuel has a timer switch 11 including a switch automatically operating when the prescribed time lapses after the operation of the truck, and the alarm lamp 13 and the alarm buzzer 14 raising the alarm by the operation of the switch of the timer switch 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warning device for notifying a running out of fuel applied to a natural gas type forklift truck which operates on natural gas as fuel.

[0002]

2. Description of the Related Art Conventionally, a natural gas type forklift truck which operates using natural gas as a fuel has a gas cylinder 3 mounted on a counterweight 2 at a rear portion of a vehicle body 1 as shown in a side view of FIG. The gas cylinder 3 was filled with natural gas.

In such a natural gas forklift truck, even if the gas cylinder 3 on the counterweight 2 is fully filled with natural gas, the operation time is as short as at most three or four hours. Therefore, it is necessary to frequently fill the gas cylinder 3 with natural gas as a fuel.

Normally, an operator looks at the fuel gauge 5 indicating the pressure in the gas cylinder 3 attached to the upper front part of the driver's seat 4 to check the remaining amount of the natural gas in the gas cylinder 3. When the remaining amount of fuel becomes low, the gas cylinder 3 is filled with natural gas as fuel.

[0005]

In such a conventional natural gas forklift truck, since the operating time is short, the operator must always look at the fuel gauge in front of the driver's seat. That is, it is necessary to work while paying attention to the fuel gauge, which places a burden on the operator and causes a problem that the workability is extremely poor.

[0006]

A first aspect of the present invention is a natural gas forklift truck that is operated using natural gas as fuel, and a switch is automatically operated when a predetermined time elapses after operation. This is an alarm device for a natural gas forklift truck, which includes a timer means that generates an alarm by operating a switch in the timer means.

A second invention is the alarm device for a natural gas type forklift truck according to the first invention, wherein a predetermined time until the switch is automatically operated in the timer means can be arbitrarily changed.

[0008]

According to the first or second aspect of the present invention, the alarm device is provided with the timer device and the alarm device, and when the predetermined time elapses, the alarm device automatically issues an alarm when the fuel runs out. Running out of fuel can be easily notified to the operator.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a warning device for a natural gas forklift truck according to the present invention will be described. As shown in the side view of FIG. 1, a natural gas type forklift truck has a gas cylinder 3 mounted on a counterweight 2 at a rear portion of a vehicle body 1 as in a conventional case, and the gas cylinder 3 is filled with natural gas. In addition, a fuel gauge 5 indicating the pressure in the gas cylinder 3 is attached to the upper front part of the driver's seat 4.

In such a natural gas forklift truck, a warning device for notifying that the fuel has run out is mounted on the side of the dashboard 6 in front of the driver's seat 4 as shown in FIG. Board 7
And a timer means and an alarm means, and an alarm device on / off switch 8 for turning the alarm device on and off.

The timer means is a timer switch 11, which is operated by operating a key switch 12 provided on the side of the dashboard 6 for operating the natural gas type forklift truck. The switch will be activated. The timer switch 11 can arbitrarily change a predetermined time until the switch is automatically activated. For example, the timer switch 11 is a dial type,
This makes it possible to set the time interval from 5 minutes to 3 hours.

On the other hand, as an alarm means, an alarm lamp 13
The alarm lamp 13 emits light and emits an alarm when the switch in the timer switch 11 is activated, and the alarm buzzer 14 emits an alarm sound when the switch in the timer switch 11 is activated. It will issue a warning.

Next, the electrical configuration of the alarm device will be described. As shown in the configuration diagram of FIG. 3, the alarm device ON / OFF switch 8 is connected to a power source 21 such as a battery, and the timer switch 11 is connected to the alarm device ON / OFF switch 8. This timer switch 11
Has a power input section 22 connected to the on / off switch 8 for the alarm device, has a power output section 23, is grounded from the power output section 23, and has an a contact 24 inside the timer switch 11. And an input part 26 connected to the upstream side of the a contact 24 and the b contact 25, and a first output part 27 connected to the downstream side of the a contact 24 and the downstream side of the b contact 25. And a second output section 28 connected to the second output section 28. The first output section 27 is shut off, and the second output section 28 is grounded. On the other hand, a key switch 1 connected to a power source 21 such as a battery for operating the natural gas forklift truck.
2, the relay 31 is connected to the input section 26 of the timer switch 11, and has a contact 32 inside. The contact 32 is branched before the alarm lamp 13 and the alarm buzzer 14 are connected. The alarm lamp 13 and the alarm buzzer 14 are connected to ground.

Thus, when the key switch 12 is turned on and the alarm device on / off switch 8 is also turned on,
Electricity is supplied from the power supply 21 to the power output unit 23 from the power input unit 22 of the timer switch 11, and the operation of the timer switch 11 starts. Timer switch 11
Is normally a contact 24. Then, when a predetermined time has elapsed, the switch is automatically activated, that is, a contact 2
4 to the b contact 25. On the other hand, in the relay 31, when the key switch 12 is turned on, electricity is supplied from the power supply 21 and flows to the input section 26 of the timer switch 11, but the timer switch 11 has an a contact 24, and the first output section Since it is cut off at 27, no electricity flows and the relay 31 does not operate. Then, when the timer switch 11 switches from the a contact 24 to the b contact 25, electricity flows here, and the relay 31 is activated, that is, the contact 32 is connected, and the electricity is transmitted to the alarm lamp 13 and the alarm buzzer 14 from here. The alarm lamp 13 emits light and the alarm buzzer 14 emits an alarm sound. Then, when the on / off switch 8 for the alarm device is turned off, the timer switch 11 connects the b contact 25 to the a
The contact 24 is switched, and the alarm lamp 13 and the alarm buzzer 14 stop. The timer switch 11 operates even when the key switch 12 is turned off. When the contact 24 is switched from the a contact 24 to the b contact 25 when the key switch 12 is turned off, the key switch is turned off. When the switch 12 is turned on, electricity flows to the alarm lamp 13 and the alarm buzzer 14, so that the alarm lamp 13 emits light and the alarm buzzer 14 emits an alarm sound.

As described above, the timer switch 11 as the timer means, the alarm lamp 13 and the alarm buzzer 14 as the alarm means are provided, respectively, and when a predetermined time elapses, the alarm lamp 13 is automatically turned off when the fuel runs out. At the same time, an alarm sound is output from the alarm buzzer 14, so that the operator can be notified of the fuel shortage.
This eliminates the need for the operator to always look at the fuel gauge 5 in the upper front part of the driver's seat, that is, eliminates the need to work while paying attention to the fuel gauge 5, and greatly reduces the burden on the operator during the work. it can. In addition, when the preset time has elapsed, the warning lamp 13 is automatically emitted as the fuel runs out and the warning buzzer 14 emits a warning sound. Filling time can be set for each gas type forklift truck,
Since each of the other natural gas forklift trucks is filling, it is possible to minimize waiting at the filling place, that is, waiting for filling.

In the above-described embodiment, both the alarm lamp 13 and the alarm buzzer 14 are provided as the alarm means. However, only one of them may be used, or another alarm means may be used.

[0017]

According to the present invention, the alarm means is provided with the timer means and the alarm means, and when the predetermined time elapses, the alarm means automatically issues a warning when the fuel runs out, so that the operator can easily be notified of the fuel shortage. This eliminates the need for the operator to always work while paying attention to the fuel gauge, and greatly reduces the burden on the operator during the operation, thereby improving workability.

[Brief description of the drawings]

FIG. 1 is a side view of a natural gas forklift truck.

FIG. 2 is a detailed top view illustrating a warning device in a natural gas forklift truck according to the present invention.

FIG. 3 is a configuration diagram of an alarm device in a natural gas forklift truck according to the present invention.

[Explanation of symbols]

1 ... body, 2 ... counterweight, 3 ... gas cylinder,
4 ... Driver's seat, 5 ... Fuel gauge, 6 ... Dashboard, 7 ... Mounting board, 8 ... On / off switch for alarm device, 1
DESCRIPTION OF SYMBOLS 1 ... Timer switch, 12 ... Key switch, 13 ... Alarm lamp, 14 ... Alarm buzzer, 21 ... Power supply, 22 ... Power supply input part, 23 ... Power supply output part, 24 ... A contact, 25 ... B contact, 26 ... Input part , 27 ... first output part, 28 ... second output part, 31 ... relay, 32 ... contact.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Haruo Kanai 110 Yokokura Nitta, Koyama City, Tochigi Prefecture Komatsu Forklift Co., Ltd. F-term (reference)

Claims (2)

[Claims] 1. A natural gas forklift truck operating on natural gas as fuel, comprising timer means for automatically operating a switch when a predetermined time elapses after operation, and the timer An alarm device for a natural gas type forklift truck, comprising: an alarm device that generates an alarm when a switch in the device is activated. 2. The alarm device for a natural gas forklift truck according to claim 1, wherein a predetermined time until the switch is automatically activated in the timer means can be arbitrarily changed.