JP3377390B2 - Tank lorry car safety device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tank lorry vehicle for preventing different kinds of oil liquids from being mixed with the oil liquid in the storage tank when the oil liquid contained in the tank is injected into the storage tank of the gas station. Safety device.

[0002]

2. Description of the Related Art As shown in Japanese Utility Model Laid-Open No. 59-55200, a conventional safety device for a tank truck has a tank number of one liquid type for designation of the oil type of the oil liquid contained in each tank. This is performed by pressing the button G1 of the storage unit 10. On the other hand, the designation of the oil type in the storage tank of the gas station is performed by pressing the tank number push button switch 8a and the push button switch 9a of each liquid type display section 9, whereby the solenoid valve 19a is electrically controlled. Therefore, the regulation of the bottom valve opening / closing device 18 is released.

[0003]

However, in the above-mentioned structure, since the solenoid valves are switched by electric control,
Explosion-proof specifications are required because they are dangerous due to the occurrence of sparks, etc., but explosion-proof specifications may result in high prices.
On the other hand, in order to specify the type of oil in the storage tank at the gas station, two types of buttons had to be pressed, which was very troublesome. Therefore, an object of the present invention is to prevent different kinds of oil liquids from being mixed with the oil liquid in the storage tank of the gas station, and to prevent this mixing at a low price. To make it easy.

[0004]

To achieve the above object, a safety device for a tank truck according to claim 1 of the present invention comprises:
A bottom valve 10 provided for each compartment 7 of a tank 5 mounted on a vehicle body 4 is attached to a valve shaft 1 by a handle 11 on the tank 5.
In the tank truck 1 that is configured to open and close via 2 , only the air control valve 26a corresponding to the oil type is specified in the vehicle body 4 or the tank 5 by specifying the oil type of the oil liquid stored in each compartment 7. To a plurality of first air control valve groups 26 provided for each compartment 7 so as to be opened by a manual pressing operation, and the same oil type of each of the first air control valve groups 26.
Branch pipes 27a, 2 to all the corresponding air control valves 26a
With a single air control valve 29a connected via 7b
However , among the storage tanks T injected from the tank truck 1 , by designating the oil type of the storage tank T into which the oil liquid is injected, only the air control valve 29a corresponding to the oil type is manually operated.
A second air control valve group 29 opened by the pressing operation by
A bottom valve opening operation restricting device for releasing the bottom valve operation restriction only from the handle 11 corresponding to the first air control valve group 26 corresponding to the oil type designated by the second air control valve group 29 is provided. It has a feature.

[0005] The safety device of the tank lorry vehicle according to claim 2, in the safety device of the tank lorry vehicle according to claim 1, wherein the bottom valve opening operation regulating device and detachment apparatus S disengaging the handle 11, the engagement consists of a control unit U for controlling the detachment device S, the engaging device S and engaged member 14 on the handle 11 or the valve shaft 12 side, engaging the to-be-engaging member 14 provided on the tank side The engaging member 18 to be disengaged
It is characterized by

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 is a tank truck, and a tank 5 is mounted on a vehicle body 4 including a chassis frame 2 and a tank frame 3. The inside of the tank 5 is
A plurality of compartments 7 are partitioned by a partition plate 6 so that different types of oil liquids such as regular gasoline, high octane gasoline, kerosene, and light oil can be individually stored.

A manhole 8 for injecting an oil solution into each compartment 7 and a manhole cover 9 for opening and closing the manhole 8 are provided at the top of each compartment 7. At the bottom of each compartment 7 of the tank 5, a bottom valve 10 is provided for unloading the stored oil liquid.

Each of the bottom valves 10 is connected to a handle 11 provided at the top of each compartment 7 by a valve shaft 12, and the handle 11 and the bottom valve 10 are rotated through the valve shaft 12 by rotating the handle 11 counterclockwise. Rises to allow the discharge of the oil liquid, and when the handle 11 is rotated clockwise, the bottom valve 10 descends to regulate the discharge of the oil liquid. The discharge port 13 of each bottom valve 10 is communicated with the centralized pipe P, and the oil liquid discharged from each compartment 7 is the centralized pipe P.
And a manual opening / closing valve V provided at the end thereof and an unloading hose H connected to the end thereof are selectively injected into a plurality of storage tanks T provided in the basement of the gas station or the like.

Next, a bottom valve opening operation restricting device for restricting the opening operation of the bottom valve 10 will be described. The bottom valve opening operation restricting device includes an engagement / disengagement device S that engages / disengages with the handle 11, and a control device U that controls the engagement / disengagement device S. First, the engagement / disengagement device S is shown in FIGS. Explain. A pinion gear 14, which is an engaged member, is fixed to the valve shaft 12 below the handle 11 provided at the top of each compartment 7.
On the other hand, a bracket 15 is provided upright on the top of the tank 5, and an air cylinder 16 is fixed to the bracket 15.

Piston rod 1 of the air cylinder 16
A rack gear 18, which is an engaging member, is fixed to the front portion of 7, and when air is supplied to the front chamber 19a of the air cylinder 16, the rack gear 18 moves backward as indicated by the one-dot chain line, disengages from the pinion gear 14, and the handle 11 moves. It is designed to allow rotation. When the air in the front chamber 19a is discharged, the rack gear 18 moves forward as indicated by the solid line by the force of the spring 20 housed in the rear chamber 19b of the air cylinder 16.
It engages with the pinion gear 14 to restrict the rotation of the handle 11.

Next, referring to FIG. 4, each manhole cover 9 is described.
The hatch boxes 21 are fixed to the bolts 22 respectively. Further, in FIG. 5, a control box 23 is fixed to the manual on-off valve V by a bolt 24. Next, the air circuit of FIG. 6 which is the control unit U will be described. Air piping 25 from the front chamber 19a of each air cylinder 16
Is connected to the hatch box 21.

The air pipe 25 in the hatchbox 21 is branched into four lines of branch pipes 27a of regular gasoline, high-octane gasoline, kerosene, and light oil, which are provided with an air control valve 26a, and go out of the hatchbox 21. Out of the 24 branch pipes 27a coming out of the 6 hatch boxes 21, 6 branch pipes 27a of the same oil type are 1 branch pipe 27b.
Thus, four rows of branch pipes 27b for different oil types enter the control box 23.

The branch pipe 27b in the control box 23 passes through the air control valve 29a to form one air pipe 2
Then, it goes out of the control box 23 and is connected to the air tank AT. Next, the air control valve 26a provided inside the hatch box 21 has two ports and two positions, and each of the four rows of branch pipes 27a assigned to four types of regular gasoline, high-octane gasoline, kerosene, and light oil. The first air control valve group 26 is formed by being interposed in the middle part of the.

Each air control valve 26a of the first air control valve group 26 has a roller 26c at the tip of its operating arm 26b.
4 are arranged in parallel for each branch pipe 27a in a state in which the rollers 26c are arranged in the upper part, and the rollers 26c are partially introduced into the pocket portion 21a of the hatch box 21 and the rollers 26c are pushed down. Air control valve 26
a is switched to the open position.

The pocket portion 21a is for inserting the first oil type card X stored in the operator's cab of the tank truck 1. By inserting the first oil type card X into the pocket portion 21a, the first oil type card X is inserted. The air passage of the oil pipe branch pipe 27a of the card X is opened to the air cylinder 16 via the air control valve 26a. That is, the first oil type card X has a projecting piece X1 formed at the tip portion, and the formation position of this projecting piece X1 is different for each oil type. When the roller 26c of the first air control valve group 26 is selectively pressed by the projecting piece X1 in the state of being inserted into, the air passage of the corresponding air control valve 26a is opened. The first oil type card X is color-coded so that the oil type can be identified.

The air control valve 29a provided inside the control box 23 has three ports and two positions, and four rows of branch pipes 27 are assigned to four types of regular gasoline, high-octane gasoline, kerosene, and light oil.
The second air control valve group 2 is interposed in the middle of each of b.
9 is formed. Each of the air control valves 29a of the second air control valve group 29 is arranged in parallel for each branch pipe 27b with four rollers 29c at the tip of the operating arm 29b arranged in the upper part. Is partially introduced into the pocket portion 23a of the control box 23 and the roller 29c is pushed down to switch the air control valve 29a to the open position.

The pocket portion 23a is for inserting the second oil type card Y stored in the office of the gas station,
By inserting the second oil type card Y into the pocket portion 23a, the branch pipe 27b for the oil type of the second oil type card Y opens the air in the air tank AT to the branch pipe 27b via the air control valve 29a. That is, the second oil type card Y has a projecting piece Y1 formed at the front end thereof, and the formation position of this projecting piece Y1 is different for each oil type, and the second oil type card Y is placed in the pocket portion 23a. In the inserted state, the roller 29c of the second air control valve group 29 is selectively pressed by the projecting piece Y1 to open the air passage of the corresponding air control valve 29a. The second oil type card Y is also color-coded so that the oil type can be identified.

Next, another embodiment of the engaging / disengaging device S of the bottom valve opening operation restricting device will be described. 15 and 16,
A bracket 30 with the valve shaft 12 penetrating therethrough is fixed to the top of the tank 5, and an air cylinder 16 is fixed to this bracket 30. A ring-shaped baffle member 31 having a diameter slightly larger than the diameter of the handle 11 is fixed to the front end of the piston rod 17 of the air cylinder 16. When air is supplied to the front chamber 19a, the baffle member 31 moves as indicated by a chain line. The handle 11 is lowered from the position to allow the handle 11 to rotate.

When the air in the front chamber 19a is discharged, the force of the spring 20 accommodated in the rear chamber 19b causes the baffle member 31 to rise as shown by the solid line to surround the handle 11 and prevent the handle 11 from being gripped. The rotation of 11 is restricted. Next, still another embodiment of the engagement / disengagement device S of the bottom valve opening operation restricting device will be described. In FIGS. 17 and 18, a bracket 30 with the valve shaft 12 penetrating is fixed to the top of the tank 5, and an air cylinder 16 is fixed to the bracket 30.

Piston rod 1 of the air cylinder 16
A pin member 32 capable of penetrating the space 11a of the handle 11 is fixed to the front portion of the handle 7, and when air is supplied to the front chamber 19a, the pin member 32 descends as shown by a chain line to allow the handle 11 to rotate. I am doing it. The front room 19
When the air of a is discharged, the force of the spring 20 housed in the rear chamber 19b causes the pin member 32 to rise as shown by the solid line and enter the space 11a of the handle 11 to restrict the rotation of the handle 11.

By the way, in the present embodiment, the oil type cards are used to specify the first air control valve group and the second air control valve group, respectively. Good. The operation of the present invention having the above-mentioned construction will be described below. First, at the oil tank place, the first oil type card X corresponding to the oil type of the oil liquid injected into each compartment 7 of the tank truck 1 is brought from the operator's cab to the pocket portion 21a of the hatch box 21 of each compartment 7. When plugged in, the air control valve 26a corresponding to the oil type in the first air control valve group 26 switches to enable air supply.

Next, at the filling station, the second oil type card Y corresponding to the oil type of the oil liquid of the storage tank T to be lubricated is brought from the office and inserted into the pocket 23a of the control box 23. In the second air control valve group 29, the air control valve 29a corresponding to the oil type is switched to enable air supply. At this time, the first oil type card X
And the oil type of the second oil type card Y match,
The air in the air tank AT passes through the air pipe 28, the air control valve 29a of the second air control valve group 29, the branch pipe 27b, the branch pipe 27a, the air control valve 26a of the first air control valve group 26, and the air pipe 25. Air is supplied to the front chamber 19a of the cylinder 16. At this time, air is supplied to all of the air cylinders 16 having the same oil type.

Then, the air cylinder 16 is contracted, and the rack gear 18 is disengaged from the pinion gear 14 as shown by a chain line. In that state, among the handles 11 that have been deregulated, the handle 11 of the compartment 7 to be discharged is rotated counterclockwise to raise the bottom valve 10 and the manual opening / closing valve V is opened. The oil liquid stored in can be unloaded in a predetermined storage tank T.

When the first oil type card X inserted in the pocket 21a of the hatch box 21 of each compartment 7 and the second oil type card Y inserted in the pocket 23a of the control box 23 have different oil types. Has
The air passage of the air control valve 26a of the first air control valve group 26,
Alternatively, since either one of the air passages of the air control valve 29a of the second air control valve group 29 is not communicated, air is not supplied to the air cylinder 16 and the pinion gear 14 and the rack gear 18 are not connected. The handle 11 cannot be turned because it remains in the same position.

Therefore, it is possible to prevent the oil liquid of the oil type different from the oil type assigned to the storage tank T from being unloaded in the storage tank T. Moreover, since the restriction of opening the bottom valve 10 is released only by air without using electricity, there is no need to make explosion-proof specifications, and it can be performed at a low price. Further, the designation of the oil type of the storage tank T of the gas station can be easily performed because only one operation of inserting the second oil type card Y into the pocket portion 23a of the control box 23 is required.

[0026]

As described above, according to claim 1 of the present invention, when the oil liquids of the air control valve of the first air control valve group and the air control valve of the second air control valve group are not the same oil type, the handle is used. The bottom valve opening control device that allows the bottom valve to be operated is not released. Therefore, it is possible to prevent an oil liquid of an oil type different from the oil type of the storage tank to be unloaded from being accidentally unloaded from the tank truck to the storage tank.

Further, since the restriction for opening the bottom valve is released only by air without using electricity, it is not necessary to use explosion-proof specifications and can be performed at a low price. Furthermore, the oil type of the storage tank of the gas station can be easily specified because only one operation is required. According to the second aspect of the present invention, the engagement / disengagement device of the bottom valve opening operation restricting device allows the engaged member and the engagement member to disengage.
The simple structure ensures reliable engagement and disengagement.

[Brief description of drawings]

FIG. 1 is an overall view of the present invention.

FIG. 2 is a partial cross-sectional view of an engagement / disengagement device of the bottom valve opening operation restricting device.

FIG. 3 is a view taken along the line AA of FIG.

4 is a view on arrow B of FIG. 1. FIG.

5 is a view on arrow C of FIG. 1. FIG.

FIG. 6 is a schematic diagram of an air circuit.

FIG. 7 is a circuit diagram showing a first air control valve group.

FIG. 8 is a circuit diagram showing a second air control valve group.

FIG. 9 is a schematic view showing a first air control valve group of the hatch box.

FIG. 10 is a view on arrow D-D of FIG. 9;

FIG. 11 is a schematic view showing a second air control valve group of the control box.

FIG. 12 is a view on arrow EE in FIG. 11.

FIG. 13 is a front view of a first oil type card.

FIG. 14 is a front view of a second oil type card.

FIG. 15 is a partial cross-sectional view of another embodiment of the engagement / disengagement device of the bottom valve opening operation restricting device.

16 is a view on arrow FF in FIG. 13. FIG.

FIG. 17 is a partial cross-sectional view of still another embodiment of the engagement / disengagement device of the bottom valve opening operation restricting device.

FIG. 18 is a view taken along the line GG in FIG.

[Explanation of symbols]

1 tank truck 4 car body 5 tanks 7 compartments 10 Bottom valve 11 handle 12 valve shaft 26 First Air Control Valve Group 29 Second air control valve group T storage tank S engagement / disengagement device U control device

Claims (2)

(57) [Claims] 1. A bottom valve 10 provided for each compartment 7 of a tank 5 mounted on a vehicle body 4 is provided with a handle 1 on the tank 5.
In the tank truck 1 that is opened and closed via the valve shaft 12 by 1 , the vehicle body 4 or the tank 5 is
By designating the oil type of the oil contained in each compartment 7 , only the air control valve 26a corresponding to the oil type is manually pressed.
A plurality of first air control valve groups 26 provided for each compartment 7 so as to be opened by operation, and the first air control valve groups 26.
Branch to all air control valves 26a corresponding to the same oil type
Single air control connected via pipes 27a, 27b
Only the air control valve 29a corresponding to the oil type is manually pressed by designating the oil type of the storage tank T into which the oil liquid is injected among the storage tanks T having the valve 29a injected from the tank truck 1. Second air control valve group opened by operation
29 and the handle 11 corresponding to the first air control valve group 26 that matches the oil type designated by the second air control valve group 29.
A safety device for tank lorry vehicles, which is provided with a bottom valve opening operation restriction device that releases the bottom valve operation restriction. 2. The bottom valve opening operation regulating device is the hand.
Le11Engagement device to engage and disengageSAnd this detachment deviceSControl
Control deviceUAnd the detaching deviceSIs the handle
11Or valve stem12Member provided on the side14
And the engaged member provided on the tank side14Engage and disengage
Engaging member18The tank truck according to claim 1, which comprises
Safety device.