JPH1035794A - Oil mixing preventive lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep a locked condition or released it and increase the reliability and durability of the actuation, by providing an oil mixing preventive lock attached to an oiling aperture of the like connected to an underground tank of an oil supply station, in which a stopper working in accordance with insertion of a key and a locking lock rod are elastically supported. SOLUTION: When a stopper 5 is urged upward by a coil spring 6 and positioned in the notch 3c formed in the middle part of a lock rod 3, the lock rod 3 is restricted so as not to axially move and an oil mixing preventive lock makes a cock or the like uncontrollable. In this state, pins 8b, 8c of a specified key 8 protruding two pins 8b, 8c from the lower end of an indication plate 8a specifying the kind of oil, are inserted in insertion holes 7a, 7b to move the stopper downward and release the fixed condition in the notch 3c. Then, the lock rod 3 is shifted to the right by the coil spring 4. In this way, the locked state against the cock is released and oil can be supplied.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil-mix prevention lock attached to a fueling port connected to an underground tank at a gas station such as a gas station.

[0002]

2. Description of the Related Art When gasoline, light oil, kerosene, etc. are delivered to a gas station by a tanker truck, a hose is connected to a valve on the tank truck side at the gas station, and a coupling provided at the end of the hose is refueled on the underground tank side. The operation of connecting to the mouth is performed.

[0003] This operation is mainly entrusted to the driver of the tank lorry, which operates a valve to specify oil from a plurality of hatches of the tank lorry, and supplies oil to the underground tank corresponding to the oil of these hatches. In order to connect the coupling without error, the driver himself and the staff at the gas station work while checking.

In such unloading operations, various types of oil-mixing prevention devices and dedicated locks have been used to prevent oil-mixing in the underground tank. For example, there is one described in Japanese Patent Publication No. 1-50678.

[0005] The lock device and other locks for preventing oil mixing described in this publication include a valve provided in each of a plurality of hatches of a tank lorry and an oil supply fitting corresponding to the type of oil stored in the hatch. The key is to have one key dedicated to The above-mentioned publication has a configuration in which a so-called cylinder lock, which enables unlocking by changing the stroke of the cylinder protruding, is incorporated therein.

[0006]

However, fuel filler fittings for underground tanks are mostly installed outdoors and are exposed to sunlight, wind and rain, and are subjected to severe use conditions. For this reason, in the case of a cylinder lock composed of relatively high-precision members, if corrosion of the members occurs due to intrusion of rainwater or the like, there is a high possibility that proper operation will be impaired. Further, since the cylinder lock itself has a complicated structure and the processing and assembling accuracy of the members are high, there is a limit to the cost reduction.

[0007] Further, since the key can be easily duplicated in this conventional cylinder lock, there is a problem in the reliability of preventing oil mixture. The handling of the key is also unlocked by inserting and turning it, so that a two-step operation is required, and the operation is cumbersome.

The problem to be solved by the present invention is to provide an oil-mixing prevention lock which has a simpler structure, is easy to operate, and can reliably prevent oil-mixing.

[0009]

SUMMARY OF THE INVENTION The present invention relates to an oil-mix prevention lock disposed on a valve or a lubrication fitting provided in the middle of a flow path from an oil supply source to a supply destination. A lock rod operably incorporated from the outside of the lock rod to lock and lock the tip of the lock rod by interfering with the tip of the lock rod; elastic means for urging the lock rod in the unlocking direction; and a resilient means for abutting against the outer peripheral surface of the lock rod. It is characterized by comprising a stopper for urging the lock rod to the locked position and an insertion port for inserting a key for pushing the stopper away from the outer peripheral surface of the lock rod.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS For example, oil supply pipes for each oil are provided as equipment for sending oil from various tanks to a tank lorry in an oil depot, and these pipes are provided with valves for opening and closing flow paths by cocks, rotary handles and the like. It is incorporated as a flow path switching device. For example, in the case of a cock type valve provided with a lever, the oil mixing prevention lock of the present invention is configured such that the distal end of the lock rod is inserted into the peripheral surface of the base end portion of the lever, which rotates the valve, thereby rotating the cock. And the valve can be held in a closed position.If the key is inserted into the insertion port and the lock rod is set to the unlocked position,
A facility that opens a flow path by turning a cock can be provided.

[0011]

FIG. 1 is a longitudinal sectional view showing a main part of an oil-mix prevention lock, and FIG. 2 is a longitudinal sectional view taken along the line AA of FIG.

The anti-oil mixture lock is attached to a lubrication fitting of a gas station as will be described later, and is similarly attached to a manually operated valve provided on each of the hatches of the tank lorry. An outer shell is formed by a main body 1 having a shape and a size suitable for conditions and a cover 2 detachably attached to a side surface thereof.

A lock chamber 1a is formed in a hollow shape by recessing the cover 2 at a position which is deviated to one side of the main body 1 and covered by the cover 2, and the upper end of the lock chamber 1a penetrates the main body 1. A hole 1b is formed. This hole 1
Reference symbol b denotes a spring chamber 1c having a larger inner diameter at a portion deviating from the lock chamber 1a, and a lock rod 3 is incorporated in the hole 1b so as to be movable in the axial direction.

The lock rod 3 has such a length that both ends protrude to the outside of the main body 1, and has an operation knob 3a formed at one end thereof and a flange 3 in the spring chamber 1c.
b. A compression coil spring 4 is incorporated between the flange 3b and the inner peripheral wall at the left end of the spring chamber 1c, thereby urging the lock rod 3 rightward in FIG.

The lock rod 3 is connected to the lock chamber 1.
A notch 3 is made by cutting the meat on the outer peripheral surface flat in the part facing a.
c is provided. The notch 3c is held so as to always face the inside of the lock chamber 1a. For such holding, for example, the lock rod is engaged with the inner peripheral wall of the hole 1b by a key. The rotation around the axis 3 is eliminated.

A stopper 5 is incorporated in the upper end of the lock chamber 1a and included in the notch 3c of the lock rod 3. This stopper 5 is provided with a cylindrical guide 5a on the lower surface of a flat plate-like block. As shown in FIG. 2, the upper surface of the flanges 1d and 2a formed on the inner periphery of the lock chamber 1a and the back surface of the cover 2 respectively. And the inner wall on the upper end side of the lock chamber 1a. Then, the stopper 5 is urged toward the lock rod 3 by extrapolating the compression coil spring 6 disposed on the bottom surface side of the lock chamber 1a around the guide 5a.

Further, two grooves 1e, 1f for inserting a key plate, which will be described later, are formed in a portion above the lock chamber 1a and covered by the cover 2, and these grooves 1e and 1f are formed.
e, 1f and the portion surrounded by the cover 2
a and 7b.

In such an anti-oil mixture lock, when the stopper 5 is urged upward by the coil spring 6 and enters the notch 3c as shown in FIG. The movement in the axial direction is restricted, and the state shown in the figure is maintained. If the left end of the lock rod 3 is at the position shown in the figure and the operation of the fuel filler fitting and the valve of the tank truck is closed and locked, the lock is maintained unless the lock rod 3 is moved to the right. Is done.

On the other hand, the stopper 5 is moved downward so that the notch 3
When the lock rod 3 is disengaged from the cylinder c, the lock rod 3 is moved rightward by the coil spring 4, whereby the lock to the fuel filler metal fitting or the valve is released. Then, a key 8 as shown in FIG. 3 is prepared for releasing such a lock.

The key 8 has a display plate 8a for specifying an oil type such as "kerosene" as shown in the figure, and two pins 8b and 8c protruding from the lower end thereof. Each of these pins 8b and 8c has the same width, thickness and length, and is used as the insertion port 7 of the oil-locking lock shown in FIGS.
a and 7b are exactly matched. When the key 8 is completely inserted, the lower ends of the pins 8b and 8c can push down the stopper 5 to the position indicated by the dashed line in FIG. 3 is released.

FIG. 4 is a front view of a main part showing an example in which the arrangement of the pins 8b and 8c of the key 8 is changed, and FIG.
Is the longest between the pins 8b and 8c, and FIG.
The distance between these pins 8b and 8c is reduced in the order of (c) and (c). The pins 8b and 8c having different intervals are used as dedicated keys 8 for high-octane gasoline, regular gasoline, and light oil, for example.

On the other hand, what is shown in FIGS.
Corresponding to the kerosene key 8 of the
The distance between the keys a and 7b is adjusted to the position of the pins 8b and 8c of the key 8. Then, FIG.
(C) By providing locks having insertion holes 7a and 7b so as to match the intervals between the pins 8b and 8c of the respective keys 8 in (c), these locks can be used as exclusive locks for the corresponding oil type. Can be.

FIG. 5 is a schematic perspective view showing an example in which a lock is installed on an oil supply pipe in an oil tank, and FIG. 6 is a longitudinal sectional view of a main part thereof.

The oil supply pipe 21 is connected to a tank (not shown) storing kerosene.
The kerosene is supplied to the kerosene hatch of the tank truck by connecting the hose of the tank truck to the end of the tank. For example, a butterfly valve type valve is incorporated in the oil supply pipe 21, and the lock body 1 shown in FIGS. 1 and 2 is fixed near a cock 22 for opening and closing the valve.
The cock 22 is connected to the valve side by a disc-shaped base 22.
The lever 2 that protrudes in the radial direction that protrudes from this
2b, and a lock hole 22c is provided on the outer periphery of the base 22a in a direction orthogonal to the lever 22b. The lock hole 22c has an inside diameter into which the lock rod 3 of the lock shown in FIGS. 1 and 2 is fitted, and the valve is closed with the lever 22b in a posture orthogonal to the oil supply pipe 21 as shown in FIG. Sometimes, the lock rod 3 of the lock is in a relation of fitting.

In the equipment of the oil supply pipe 21 provided with such a lock, the lock rod 3 is connected to the lock hole 2 in the state shown in FIG.
2c, the cock 22 cannot be turned, so that the flow path of the oil supply pipe 21 remains closed. When the pins 8b and 8c are inserted into the insertion ports 7a and 7b using the kerosene-specific key 8, the stopper 5 is pushed downward in FIGS. 1 and 2 by the pins 8b and 8c as described above. The lock rod 3 is disengaged from the lock rod 3 so that the lock rod 3
Escapes from the lock hole 22c. Therefore, cock 2
2 can turn the lever 22b,
It becomes possible to supply kerosene from the oil supply pipe 21 to the tank truck.

FIG. 7 is a cutaway view of a main part showing an example in which a lock is provided on the unloading pipe 23 connected to the outlet of the hatch of the tank truck.

The unloading pipes 23 are connected to the respective outlets of the hatches of the tank truck, so that the respective downstream ends are joined to one unloading main pipe or individually connected to hoses for unloading. It is one that is normally installed in conventional tank trucks. In the illustrated example, the unloading pipe 23 is for kerosene, and the operating handle 2 for opening and closing a valve incorporated therein is provided.
The lock body 1 is fixed near the operation handle 24.

The operation handle 24 is of a rotary operation type, and is lowered to the lowest position in the state of FIG. 7, so that the internal valve is closed. The lock is arranged so that the tip of the lock rod 3 is positioned so as to slightly cover the operation handle 24, and the valve is raised by an amount corresponding to a gap between the operation handle 24 and the lock rod 3 in the figure. Even so, the conditions are set so that the flow path is not opened yet.

The main body 1 of such a lock and the operation handle 24
When the operation handle 24 is to be raised by rotating the operation handle 24 depending on the positional relationship between the lock handle 3 and the operation handle 2.
4 to block the movement. Therefore, if the lock is set to the state shown in FIG. 1, the valve cannot be opened by the operation handle 24 unless the key 8 is used, and oil mixture when using a key other than the kerosene-specific key 8 is reliably prevented. Is done.

[0030]

According to the present invention, it is possible to perform the operations of maintaining and releasing the locked state only by elastically supporting each of the stopper and the lock rod for locking which operate according to the key insertion. Therefore, the elastic force can be used as a drive source for the operation without increasing the processing accuracy or the like of each part, and the operation and the durability can be surely improved.

Further, since the shape of the pin provided on the key may have a function of simply pressing the stopper, the shape of the key does not become complicated, the key can be easily visually checked, and oil mixing is prevented. Is more effectively achieved.

Furthermore, for example, a general key for a cylinder lock can be easily duplicated at a special key store, so that reliable key management cannot be performed. However, the shape of the key used in the present invention cannot be made at a special key store. If the data cannot be duplicated as a special shape, key management can be performed reliably.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a main part of an oil-mixing prevention lock of the present invention.

FIG. 2 is a longitudinal sectional view taken along line AA of FIG.

FIG. 3 is a front view showing a key dedicated to kerosene.

FIG. 4 is a front view of a main part showing an arrangement of pins in a key dedicated to three types of oil other than kerosene.

FIG. 5 is a schematic view showing an example in which a lock is disposed at a valve portion of a kerosene oil supply pipe at an oil tank.

FIG. 6 is a schematic vertical sectional view of a main part showing a lock between a lock rod and a cock of the lock shown in FIG. 5;

FIG. 7 is a cutaway view of a main part showing an example in which a lock is arranged at a valve portion of an unloading pipe of a tank truck.

[Explanation of symbols]

 1: body 1a: lock chamber 1b: hole 1c: spring chamber 1d: flange 2: cover 3: lock rod 3a: knob 3c: notch 4: coil spring 5: stopper 6: coil spring 7a, 7b: slot 8: key 8a: Display plate 8b, 8c: Pin 21: Oil supply pipe 22: Cock 22a: Base 22b: Lever 22c: Lock hole 23: Unloading pipe 24: Operation handle

[Procedure amendment]

[Submission date] October 1, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0029

[Correction method] Change

[Correction contents]

The main body 1 of such a lock and the operation handle 24
When the operation handle 24 is to be raised by rotating the operation handle 24 depending on the positional relationship between the lock handle 3 and the operation handle 2.
4 to block the movement. Therefore, if the lock is set to the state shown in FIG. 1, the valve cannot be opened by the operation handle 24 unless the key 8 is used, and oil mixture when using a key other than the kerosene-specific key 8 is reliably prevented. Is done. Conventionally, the key 8 can be stored and transported.
The use of a container of
Indeed, it can be prevented. That is, refueling from the oil depot
When transferring oil to the place, match the number on the order slip.
Dedicated transport containers with multiple displays
This container has a key for each oil type
So that they can be stored and handled
Can be used to prevent oil mixture
Further improve.

Claims (1)

[Claims] 1. An oil-mixing prevention lock disposed on a valve or a lubrication fitting provided in the middle of a flow path from an oil supply source to a supply destination, which is operably incorporated from the outside of the lock body. A lock rod for locking and restraining the lock rod by interfering with the tip thereof, elastic means for urging the lock rod in the unlocking direction, and a lock position for resiliently urging the lock rod in a direction of abutting against the outer peripheral surface of the lock rod. An oil mixture prevention lock provided with a stopper for restricting the stopper and an insertion port for inserting a key for pushing the stopper away from the outer peripheral surface of the lock rod.