JPS6315057Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an interlock device for an airplane, an underground tank, or a refueling vehicle that refuels fuel or the like.

In the case of such refueling vehicles, during refueling work, that is, with the work lifter raised,
If a third party accidentally starts the refueling truck while the refueling hose is connected to the refueling port of the airplane's fuel tank, the worker on the lifter may fall, or Accidents occurred in which the refueling hose and fuel filler port of the fuel tank were damaged, and there was also a risk of accidents such as fires occurring.

In order to prevent such accidents from occurring, various engine stop interlock devices have been proposed to prevent a refueling vehicle from starting during refueling operations. These interlock devices are configured to activate the engine stop device if the parking brake is accidentally released during refueling.

However, although this interlock device can be applied to both air brakes and hydraulic brakes, even if the vehicle is equipped with a pump, the braking force of the parking brake is generally weak even when braking is in progress. When the transmission is in a low gear, the engine torque is stronger, and the refueling vehicle may start during refueling, and there is still the risk of the aforementioned accident occurring. That is, the conventional interlock device operates only after the parking brake is released, and the problem of the above-mentioned accidents occurring during braking has been pointed out.

The present invention has been developed to solve the above-mentioned problems in view of the above-mentioned circumstances. To provide an engine stop device for a refueling vehicle that can reliably prevent the refueling vehicle from starting during refueling work by driving an engine stop mechanism when the refueling vehicle reaches the specified position.

The present invention will be described below based on embodiments shown in the drawings.

First, the configuration will be explained.

The interlock device for refueling vehicles according to the present invention is
At least one of the refueling devices, such as the refueling hose reel 1, the refueling nozzle storage part 2, and the lifter 3, is provided with a storage switch 4 that turns off in the retracted state,
And change lever 6 of transmission 5
A gear shift switch 7 which is turned off at a neutral position is provided, and an engine stop mechanism A is provided which is driven when the storage switch 4 is turned on and the gear shift switch 7 is turned on.

The storage switch 4 can be installed in various ways, but one example will be described in which it is installed in the refueling nozzle storage section 2 shown in FIGS. 2 and 3, for example.

FIG. 1 is a schematic plan view of a refueling vehicle, which includes a refueling hose reel 1 that stores a refueling hose, a refueling nozzle storage section 2 that stores and holds a refueling nozzle, a lifter 3, and other refueling devices. It is provided. The refueling nozzle storage section 2 has a box shape and is composed of an immovably fixed container section 8 and a lid section 10 attached to one end of the container section via a hinge 9 so as to be openable and closable. The lid part 10 is locked to the other end of a hook spring 11 whose one end is pivotally connected to the container part 8,
The lid portion 10 is opened and closed by operating a handle 12 pivotally fixed to the lid portion 10. Container part 8 and lid part 1
Pillows 14, 14 made of an elastic material are provided in opposition to each other in the interior of the fuel supply nozzle 13 to clamp the neck of the stored fuel nozzle 13.

A storage switch 4 is installed in the refueling nozzle storage section 2 as described below. That is, 15 is a container part 8 which can be freely swung by a pin 16.
The lower half of this rotating lever 15 is urged to rotate so that the tip of the refueling nozzle 13 protrudes into the space occupied when it is stored. A switch lever of a retractable switch 4, which is immovably fixed and is, for example, a limit switch, is located opposite to the lower end of the switch 15. Note that reference numeral 17 denotes a tension spring for biasing rotation, which is stretched between the upper end of the rotation lever 15 and the container portion 8. Therefore, when the refueling nozzle 13 is not retracted, the rotary lever 15 assumes an inclined position as shown by the solid line in FIG. 3, and in this case, the retracting switch 4 is turned on. Next, when the refueling nozzle 13 is in the retracted state, the rotary lever 15 is rotatably displaced to an upright position as shown by the chain line. It is designed to be turned off by

The storage switch 4 may be provided in the refueling nozzle storage section 2 as in the embodiment described above, but may also be provided in other refueling devices such as the refueling hose reel 1, the lifter 3, the storage door, etc., or it may be provided in only one location. Instead, a plurality of them may be provided at each location.

Next, the gear change switch 7 will be explained.

There are various possible installations of this speed change switch 7, but for example, one installed on the change lever 6.
An example will be explained based on FIG.

Reference numeral 5 denotes a transmission, and a change lever 6 is erected from the transmission 5 and swings from its neutral position near the center to forward and backward positions in the front and rear directions. A bearing 19 is fixed to the transmission 5 via a bracket 18. A shaft 20 is assembled to the bearing 19, and a fork having a gap extending in the left-right direction is attached to the end of the shaft 20 on the side of the change lever 6. An arm 21 is attached, and a change lever 6 is located in the gap. A cam disk 22 is attached to the other end of the shaft 20, and a speed change switch 7, such as a limit switch, is disposed opposite the cam disk 22. This speed change switch 7 is attached to the bearing 19 via a bracket 23. There is. When the change lever 6 is in the neutral position, the cam disc 22 controls the speed change switch 7 as shown in the figure.
is turned off, and when the change lever 6 is displaced back and forth to move the refueling vehicle forward or backward, the cam disc 22 is also rotationally displaced via the fork arm 21, and the speed change switch 7 is turned on. There is.

Next, the engine stop mechanism A will be explained. Although various types of engine stop mechanism A are possible, examples shown in FIGS. 5 and 6 will be described below.

In the example shown in FIG. 5, the engine is stopped by cutting off the supply of fuel into the cylinder.

A fuel injection nozzle 25 is attached to the cylinder head 24, an injection pump 26 is connected to the fuel injection nozzle 25, and a supply pipe 27 from a fuel tank (not shown) is connected to the injection pump 26. has been done. A fuel valve 28 is provided in the supply pipe 27, and the tip of the plunger rod of an electromagnetic plunger 30 is connected to one end of the operating lever 29 of the fuel valve 28. Therefore, when the electromagnetic plunger 30 is energized, the plunger rod retreats, the operating lever 29 rotates, and the fuel valve 28
The engine is then stopped by switching from open to closed.

In the example shown in FIG. 6, the inside of the cylinder is opened to the atmosphere, making it impossible to increase the pressure inside the cylinder, and then the engine is stopped.

Reference numeral 31 denotes a decompression valve attached to the cylinder head 24 to open the inside of the cylinder to the atmosphere, and one end of an operating lever 32 rotatably attached to the cylinder comes into contact with the tip of the valve rod. The other end is connected to the tip of the plunger rod of the electromagnetic plunger 33. Therefore, when the electromagnetic plunger 33 is excited, the plunger rod moves forward, the operating lever 32 rotates, and the valve 3
1 from closed to open, the engine will stop.

The examples shown in FIGS. 5 and 6 mainly relate to diesel engine vehicles. In the case of a gasoline-powered vehicle, the engine stop mechanism A may also include means for turning off the engine's ignition circuit using a switch circuit using a relay or the like.

Next, the electric circuit of the present invention will be explained.

That is, the electric circuits of the storage switch 4, the speed change switch 7, and the engine stop mechanism A will be explained using the example shown in FIG.

The storage switch 4, the speed change switch 7, and the engine stop mechanism A are connected in series and inserted between both terminals of a power source E, which is a battery. In the case of the engine stop mechanism A shown in FIGS. 5 and 6, the excitation coils of the electromagnetic plungers 30 and 33 are actually connected to this circuit, and the other engine stop mechanism A is connected to the ignition circuit, for example. If the switch is configured to turn off, what is actually connected to the circuit is a switch circuit using a relay or the like. The retraction switch 4 is set to be off when the refueling device such as the refueling nozzle storage section 2 is in the retracted state, and the shift switch 7 is set to be off when the change lever 6 is in the neutral position. When a plurality of storage switches 4 are provided, the storage switches 4 are connected in parallel to each other. F is a fuse and S is a main switch.

Since the interlock device according to the present invention is constructed as described above, it operates as described below.

That is, to explain mainly with reference to FIG. 7, before a refueling vehicle equipped with the interlock device starts refueling work, the refueling device such as the refueling nozzle storage section 2 is in the retracted state, and the refueling switch 4 is in the retracted state. is off, and even if the change lever 6 of the transmission 5 is in the forward or reverse position and the speed change switch 7 is on, the engine stop mechanism A will not operate.

Next, when this refueling vehicle is in the process of refueling, the refueling devices such as the refueling nozzle storage section 2 are stored and released, so the storage switch 4 is turned on, but the change lever 6 is in the normal state. In this state, the engine is in the neutral position and the speed change switch 7 is off, so the engine stop mechanism A is still not activated.

However, during this stage of refueling, that is, when the storage switch 4 is on, if the change lever 6 is accidentally shifted to a forward or reverse position other than the neutral position in order to start the refueling vehicle, The storage switch 7 is turned on, and the engine stop mechanism A is immediately activated to stop the engine. in this way,
If the refueling vehicle is being refueled while the refueling vehicle is being refueled and the lifter 2 is raised or the refueling hose is connected to the refueling port (not shown) of the fuel tank of an airplane, etc., the refueling vehicle is mistakenly started. If an attempt is made to do so, the engine stop mechanism A will surely operate, thereby avoiding a situation in which the refueling vehicle runs.

In the circuit diagram shown in Figure 7, an alarm circuit using buzzer B etc. is connected in parallel to engine stop mechanism A, but doing so will prevent the refueling vehicle from accidentally starting during refueling. As mentioned above, there is an advantage that the buzzer B etc. can warn that the engine stop mechanism A has entered the operating state, thereby notifying the operator etc. of the occurrence of an abnormal situation.

7, a relay R is connected in parallel to the series circuit of the speed change switch 7 and the engine stop mechanism A.
is connected in parallel with the series circuit of the storage switch 4, the speed change switch 7, and the engine stop mechanism A.
The normally open contact _r1 of the relay R and the pilot lamp
A parallel circuit of a series circuit of _RL1 and a series circuit of normally closed contact _r2 of relay R and pilot lamp _RL2 is
With this connection, when the storage switch 4 is off, no power is supplied to the relay R, so that, for example, a blue pilot lamp _RL2 is connected to the power source via the normally closed contact _r2 and lights up.
When the storage switch 4 is turned on, the relay R operates, the normally closed contact _r2 opens and the normally open contact _r1 closes, so that, for example, a blue pilot lamp is turned on.
RL ₂ is off, for example the red pilot lamp
A pilot lamp like this with PL ₁ on
There is an advantage that an operator can easily check at any time whether or not refueling is being performed by checking whether the RL ₁ and RL ₂ lights are on or off.

The interlock device for refueling vehicles according to the present invention is
As explained above, we have provided an engine stop mechanism that is activated when both conditions are met: the retraction switch is turned on when the refueling system is retracted and released, and the transmission switch is turned on when the transmission change lever is in a position other than neutral. If a third party accidentally switches the transmission from neutral to driving during refueling and attempts to start the refueling vehicle, the engine stop mechanism will immediately activate and the engine will be stopped. It is.

In other words, the interlock device of the fuel tanker according to the present invention does not require the parking brake to be applied to activate the engine stop mechanism as in the conventional example.
Since this is done subject to the condition of the transmission, the engine can be stopped with great certainty, eliminating the risk of the tanker starting off during refueling. This also ensures that accidents such as the worker on the lifter falling off, damage to the refueling hose or the fuel filler neck of the fuel tank of an airplane, or even fire, which may occur when starting off during refueling, can be prevented.

Further, the interlock device according to the present invention has a simple structure and is easy to implement, and has the advantage that it can be applied to both air brakes and hydraulic brakes even in pump-equipped refueling vehicles.

As described above, the interlock device for a refueling vehicle according to the present invention has significant effects, such as eliminating the problems associated with conventional devices of this type.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view of the refueling vehicle. 2 and 3 show a refueling nozzle storage section provided with a storage switch, FIG. 2 being a front view thereof, and FIG. 3 being a longitudinal sectional side view thereof. FIG. 4 is a perspective view showing a transmission equipped with a speed change switch and a change lever. 5 and 6 show examples of the engine stop mechanism, with FIG. 5 being a schematic diagram showing a case where the mechanism is provided in a fuel valve, and FIG. 6 being a schematic view showing a case in which the mechanism is provided in a decompression valve, respectively. FIG. 7 is an electrical circuit diagram showing an example of how the storage switch, gear shift switch, and engine stop mechanism are connected to a power source. 1... Refueling hose reel, 2... Refueling nozzle storage section, 3... Lifter, 4... Storage switch, 5
...Transmission, 6...Change lever, 7...Transmission switch, 8...Container part, 9...
... Hinge, 10 ... Lid part, 11 ... Hook spring, 12 ... Handle, 13 ... Refueling nozzle, 1
4... Pillow, 15... Rotating lever, 16... Pin,
17...Tension spring, 18...Bracket, 19
... bearing, 20 ... shaft, 21 ... fork arm, 22 ... cam disk, 23 ... bracket, 2
4... Cylinder head, 25... Fuel injection nozzle, 26... Injection pump, 27... Supply pipe, 2
8...fuel valve, 29...operation lever, 30...electromagnetic plunger, 31...decompression valve, 32...operation lever, 33...electromagnetic plunger, A...engine stop mechanism, B... Buzzer, E...Power supply, F...Fuse, S...Main switch, R...Relay, r ₁ ...Normally open relay contact, r ₂ ...Normally closed relay contact, RL ₁ ...Pilot lamp, RL ₂ ...Pilot lamp.

Claims (1)

[Scope of Claim for Utility Model Registration] At least one refueling device such as a refueling hose reel, a refueling nozzle housing, or a lifter in a refueling vehicle is provided with a storage switch that is turned off in the retracted state, and a transmission in the refueling vehicle is provided. A gear change switch that is turned off when the change lever of the engine is in a neutral position is provided, and an engine stop mechanism for the refueling vehicle is provided, which is driven when the storage switch is turned on and the gear change switch is turned on. Interlock device for refueling vehicles.