JPH0150678B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a locking device for preventing oil mixture at a gas station.

Conventionally, when filling an underground tank from a tank truck at a gas station, there have been frequent accidents where different types of oil are mistakenly filled. A method has been adopted in which tags are attached to the oil filler port and the tank chamber release valve of a tank truck, and the tags are matched together to confirm the type of oil when refueling an underground tank, but this method relies on human vision. However, it is an extremely uncertain method of confirmation, and has the drawback of often causing mistakes in mixing oil.

In this invention, a lock device is provided for each oil type in the coupling of the oil filler port in the underground tank of the gas station and the tank bottom valve of the tank truck, and a key is provided for unlocking the lock device for each oil type. is provided separately, and the same key is
The key storage device is configured to be stored in a separately provided key storage device, and the key storage device includes a key storage frame,
The key storage frame is configured so that each key can be inserted and removed side by side and stored, and each key has a horizontal groove at a common position. The surface of each key stored in the frame is configured to be able to slide freely in the horizontal direction, and the sliding surface that is the back of the indicator plate is formed with a protrusion that can be slid by loosely fitting into the horizontal groove of each key. A notch with approximately the same width as the width of the key is formed in the middle, and a plate spring that is biased to protrude toward the stored key is provided in this notch, and the spring fills the space after the key is extracted. When I entered the
Both sides of the plate spring are in contact with the storage keys on both sides, and the instruction plate is configured to be non-slidable.
Only the key for each type of oil can be taken out, and the locking device for the coupling of the oil filler port is configured so that it can only be unlocked with an unlocking key that fits the tank bottom valve of the tank truck. The purpose of the present invention is to provide a locking device for preventing oil mixture at gas stations.

To explain the embodiment of the present invention in detail based on the drawings, A indicates a gas station, and underground of the gas station A, there are a large number of underground tanks 1 for each type of oil.
-1, 1-2, 1-3... are buried, and oil fill ports protrude above the ground from each underground tank of the same gas station A via pipes 2 buried underground.

Each oil filler port is constituted by a coupling ring 3, and a lid body 4 is screwed into the coupling ring 3 so as to be openable and closable.

That is, the coupling ring 3 is formed in a male shape, and a female-shaped lid body 4 is screwed onto the upper part of the coupling ring 3, and the upper end of an upper latch piece 5 is connected to the peripheral wall of the lid body 4. A locking rod insertion hole 6 is provided at the lower part of the coupling ring 3, and a lower latch piece 7 is provided protruding from the lower part of the peripheral wall of the coupling 3, and a locking hole 8 is provided at the tip of the lower latch piece 7. . Furthermore, a certain gap 9 is formed between the upper latch piece 5 and the lower latch piece 7. Each underground tank 1-1, 1-
The following locking devices M-1, M-2, M-3, etc. are attached to the upper and lower latch pieces 5, 7 provided on the couplings 3, respectively.

In other words, the locking device M locks the money receiver 10 on the left side.
and the lock body 11 on the right side by connecting member 12.
It is connected via. Above the connecting member 12, the lock rod 13 is moved from the lock body 11 to the receiver 10.
The lock lever 13 is constructed so as to be able to move back and forth up to the lock body 11 by a lock mechanism (not shown) built into the lock body 11. .

Further, below the connecting member 12, a locking rod 14 is installed between the lock body 11 and the receiver 10.

The installation state of such a locking device M is shown in FIGS. 2 to 5.
As shown in the figure, the locking rod 14 is inserted into the locking hole 8 of the lower latch piece 7 of the coupling 3, and when the connecting member 12 is positioned in the gap 9 between the upper and lower latch pieces 5 and 7, it is locked. By sliding the rod 13 through the lock rod insertion hole 6 of the upper latch piece 5, the upper and lower latch pieces 5 and 7 are integrally connected and locked, and when the lock device M is unlocked. , there is a key insertion hole 1 provided on the side of the lock body 11.
By inserting the key K from 5 and sliding the lock lever 13 backward to release the locking engagement between the lock device M and the upper latch piece 7, the lock device M
is rotated downward around the locking rod 14, the cover body 4 is turned, and the cover body 4 is separated from the coupling ring 3 and opened.

In this way, lock devices M-1, M-2, M-
3... are installed, and keys K-1, K-2, K-3... that can unlock each lock device M-1, M-2, M-3... are separately provided. The key is stored in the key storage device S.

In addition, each tank chamber 16-1, 16-2, 1 of tank truck B that refuels gas station A
6, 3... have a hatch handle 17 and a bottom valve handle 18 protruding from the upper part. The hatch handle 17 is used to open and close the hatch when refueling the tank chamber of tank truck B at an oil depot, and the bottom valve valve handle 18 is used to open and close the bottom valve when taking out oil from each tank chamber 16. It is used for. A lock string 19 is hung between the bottom valve handle 18 and the hatch handle 17, and one end of the string 19 has a loop portion 19-1.
It engages with the lock lever N-13 of a lock device N having the same structure as the lock device M, and the other end loop portion 19-2 is
They are respectively engaged with the locking rods N-14 of the locking device N. The lock string 19 described above is attached to the hatch handle 17 and bottom valve handle 18 provided in each tank chamber, and the lock device N-
1, N-2, N-3... are lock devices M-1, M-2, M installed at the oil filling port of gas station A.
-3..., and can only be unlocked with the keys K-1, K-2, K-3... for unlocking the lock device M.

Each lock device M, N is provided with a column 20 for storing the oil type name such as regular gasoline, high-octane gasoline, light oil, kerosene, etc.

The locking rod 14 of the locking device M can be installed in either the front or rear positions, and the lock body 11 and the receiver 1 below the connecting member 12 are connected to each other.
At the bottom of the 0, there are two holes a, front and rear for locking the locking rods.
b is provided, and a coupling ring 3 and a lid body 4 are provided.
The holes a and b used in the locking rod 14 are selected depending on the shape of the upper and lower latch pieces 5 and 7, and the coupling shown in FIGS. 2 and 3 and the coupling shown in FIGS. 4 and 5 are selected as appropriate. The coupling shown in the figure can be used depending on the structure of the upper and lower latch pieces 5 and 7.

In the figure, 21 indicates a chain body for connecting the coupling ring 3 and the lid body 4.

Next, the key storage device S that stores each key K-1, K-2, K-3, . . . will be explained.

In other words, the key storage device S is installed at a gas station A, and the key storage frame 2
2 and a slidable instruction plate 23. In order to store each key, the key storage frame 22 is provided with partition plates 24 that are spaced apart from each other at regular intervals, and each key is stored between them so that it can be freely pulled out upwards. The surfaces are at the same height and have common grooves 25 and 26 formed therein.

Further, the instruction plate 23 is configured to be able to slide horizontally between the keys stored in the key storage frame 22 and the upper surface of the partition plate 24. A protrusion 27 is formed, and the protrusion 27 is cut out in the middle with a width that is approximately the same as the width of the key, and a recessed part 28 is formed on the back surface of the indicator plate 23 corresponding to this cutout. A plate spring 29 is provided in the concave portion 28, and a tip of the plate spring 29 partially protrudes outward. A pointing arrow 30 is provided on the surface of the pointing plate 23 located on the opposite side of the concave portion 28 .

The shape of the key K is a long and thin plate, with a tip at the tip.
A cutout groove K for unlocking is provided that is compatible with each locking device.

Therefore, when the instruction plate 23 is attached to the key storage frame 22, the protrusion 27 slides in the horizontal grooves 25, 26, and the protruding portion of the plate spring 29 also touches the upper surface of each key and the upper surface of the partition plate 24. Therefore, the keys are pushed back into the concave portion 28, so that the sliding of the indicator plate 23 is not obstructed, and the protrusions 27 prevent the keys from being removed.

However, when the indicating arrow 30 is aligned with any key position, for example, the key K-1 for regular gasoline, the recessed portion 28 is located at the key K-1, and in this recessed portion 28, the protrusion 27 Since the key K-1 is notched, it is possible to remove the key K-1.
After the key K-1 is removed, the protruding end of the plate spring 29 fits between the partition plates 24, and the partition plates 24
Due to this, the instruction board 23 cannot be slid.
When the key K-1 is stored in the position based on the key K-1, the instruction plate 2
3 slides, and it is constructed so that more than two keys cannot be taken out.

This invention is constructed as described above, and how to use it will be explained as follows. That is, the bottom valve handles 18 and hatch handles 17 of the tank chambers 16-1, 16-2, 16-3, etc. of the tank truck B are locked in advance with the locking devices N-1, N-2, N-3, etc. Keep it
Also, a lock device M-1, M is attached to the coupling 3 of the oil filler port of each underground tank 1-1, 1-2, 1-3...
-2, M-3... are locked. In addition, a key K- is used to unlock the lock devices M and N for each type of oil.
1, K-2, K-3... are stored in the key storage device S.

Then, tank truck B is transported to gas station A. Next, when refueling each underground tank 1-1, 1-2, 1-3... from the tank chamber 16-1, 16-2, 16-3... of the tank truck B, first, the instructions of the key storage device S are read. Take out the key K-1 according to the type of oil to refuel the plate, for example, regular gasoline. When the key K-1 is taken out, the instruction plate 23 is automatically fixed and cannot be slid, and the other keys K-2, K-3, . . . cannot be taken out.
Using the regular gasoline key K-1 taken out, unlock the locking device M-1 of the filler port of the underground tank 1-1 for storing regular gasoline, and open the lid 4 of the coupling 3. After closing the lid, connect the hose c of the tank truck B to the coupling ring 3, and then use the same key K-1 to unlock the locking device N-1 that locks the bottom valve handle 18 and the hatch handle 17. Pour regular gasoline from tank chamber 16-1 containing regular gasoline into hose c and into underground tank 1- from the filler port.
1 with regular gasoline,
When refueling is completed, use key K-1 to lock each lock device M-.
1. Lock N-1, store it in the key storage device S, slide the instruction plate 23 to the position of the key K-2 for the other oil type, and then press the key K-2 for the other oil type. Take out the key K-1 and use the same procedure as underground tank 1.
-2 and other types of oil are supplied.

It is also possible to use the locking device N of the hatch handle 17 in combination with the locking device of the oil tank when refueling the tank truck B at an oil depot. Further, the key storage device S can be installed at an oil depot other than the gas station A.

According to this invention, unless the same oil type key is used for each type of oil, the bottom valve of the tank truck and the coupling of the filler port of the gas station will not be opened. It is possible to lubricate with the same type of oil, and
Since only one key can be taken out at any time by the key storage device at the gas station, there is no need to use another key while one key is being used to open the lock. There is no need to unlock the lock device and refill the underground tank with a different type of oil from the tank room, and it is possible to detect incorrect oil injection when operating the key without relying solely on sight, and to prevent oil mixtures. Furthermore, the key storage device is composed of a key storage frame and a slidable instruction plate, and the key storage device is composed of a key storage frame and a slidable instruction plate. By just sliding the
Since the desired key is extracted and the other keys are locked, the operation is simple, the structure is simple, and the keys can be stored accurately.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the state in which the locking device of the present invention is used. FIG. 2 is a side view of the main parts. Figure 3 shows
The same front view. FIG. 4 is a side view of another embodiment. Fifth
The figure is a front view of the same. FIG. 6 is a front view of the locking device. FIG. 7 is a side view of the same. Figure 8 shows the locking device used on the bottom valve handle and hatch handle of a tank truck. FIG. 9 is a front view of the key storage device. FIGS. 10 and 11 are cross-sectional views taken along lines - and - in FIG. 9. Figure 12 shows the 9th
Figure - cross-sectional view of the line. FIG. 13 is a partial perspective view of the back side of the instruction plate. FIG. 14 is a partial perspective view of the key storage frame. A: Gas station, B: Tank truck, K: Key, M, N: Lock device, S: Key storage device, 1: Underground tank, 3: Coupling,
4: Lid body, 5: Upper latch piece, 6: Lock rod insertion hole, 7: Lower latch piece, 8: Locking hole, 11: Lock body, 13: Lock rod, 17: Hatch handle,
18: Bottom valve valve handle.

Claims (1)

[Claims] 1 Underground tank 1-1, 1 of gas station A
Lock devices M and N for each oil type are provided in the coupling 3 of the oil filler port in... and the tank bottom valve of the tank truck B, respectively, and keys K are provided for unlocking the lock devices for each oil type. −
1, K-2... are provided separately, and the same keys K-1, K-2
. , each key is constructed so as to be able to be inserted and removed side by side and stored, each key is provided with a horizontal groove 25 at a common position, and an instruction plate 2 is provided.
3 is configured to be able to slide freely in the lateral direction on the surface of each key stored in the key storage frame 22, and can be slid by loosely fitting into the lateral groove 25 of each key on the sliding surface that is the back surface of the instruction plate 23. A protruding strip 27 is formed, and a notch portion having a width substantially the same as the width of the key is formed in the middle of the protruding strip 27, and a plate spring 29 that is biased to protrude toward the storage key side is provided in this notch portion. When the spring 29 enters the space after the key has been extracted, both sides of the plate spring 29 come into contact with the stored keys on both sides, and the indicator plate 23 is configured so that it cannot slide, so that only one type of key can be used. To provide a locking device for preventing oil mixture in a gas station, which prevents oil from being taken out, and on the other hand, a locking device for a coupling of a filling port can be unlocked only with an unlocking key that fits the tank bottom valve of a tank truck.