JP2000247399A - Bottom valve locking device for tank lorry - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make compact bottom valve operation handle locking mechanisms provided on respective hatches of a tank lorry. SOLUTION: Each of locking mechanism 20 is constituted of an engaging member 44 fixed on a valve shaft 18, a first locking section 47 engaged with the engaging member 44 and locking the valve shaft 18, a second locking section 48 locking the first locking section 41 and a motorized actuator 49 driving the second locking section 48. The engaging member 44 is locked by the first locking section 47 of the locking mechanism 20, and as the first locking section 47 is locking by the second locking section 48, the second locking section 48 can be driven by a comparatively small force, and the motorized actuator 49 is made smaller and of a compact constitution. A compressor, an air piping and the like are not required to be installed, and the installation work can be easily carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottom valve locking device for a tank truck, and more particularly, to preventing oil liquid loaded in each of a plurality of hatches from being unintentionally unloaded to an underground tank of a delivery destination. The present invention relates to a bottom valve locking device for a tank lorry configured to perform the following.

[0002]

2. Description of the Related Art A tank truck is generally used as a delivery means for delivering an oil liquid from an oil depot to a gas station or the like. The tank of a tank truck is divided into a plurality of hatches. Each hatch has gasoline for the first hatch, light oil for the second hatch, and kerosene for the third hatch according to the order of the delivery destination. In particular, it is possible to load oil liquids of different oil types for each hatch. Therefore, when the tank lorry arrives at the delivery destination gas station, the driver checks the nameplate or the like provided near the lubrication port of the underground tank to confirm that the oil type of the underground tank is gasoline, for example.

After that, one end of the unloading hose is connected to the bottom valve discharge port of the No. 1 hatch of the tank truck, and the other end is connected to a lubrication port provided in a gasoline underground tank.
For example, unloading is performed by opening the bottom valve of the hatch of the tank truck. Hereinafter, the same operation is performed when unloading light oil and kerosene. The operation handle of the bottom valve provided for each hatch is provided at the top of each hatch, and the valve shaft to which the operation handle is attached passes through the hatch and is connected to the bottom valve at the bottom of the hatch. . Therefore, when the tank lorry arrives at the gas station, the driver connects the unloading hose as described above, and then turns the operation handle provided at the top of the hatch to open the valve. As a result, the oil liquid in the hatch is unloaded to the underground tank at the gas station.

Conventionally, when the operating handle provided on another hatch to which the unloading hose is not connected is erroneously opened when the operating handle is opened, the oil liquid in the hatch is opened. Is discharged to the ground. Therefore, a lock mechanism that locks the operation handle itself so that the operation handle cannot normally be rotated is attached to each operation handle.

[0005] Further, a conventional lock mechanism is a lock mechanism that is manually unlocked by using a key, and the operation handle is rotated by covering the upper and outer periphery of the handle with a cup-shaped cover. The actuator is driven to lift the cover at the time of unloading, and then is rotated 90 ° horizontally to release the lock. The operation is performed by placing a ring-shaped frame on the outer periphery of the operation handle. There is a configuration in which the handle cannot be rotated, and an actuator is driven to lower the ring-shaped frame to release the lock when unloading.

[0006] However, the above-mentioned conventional one is required to manage keys for each hatch and is required to carry a plurality of keys, which is not only troublesome, but also requires an unloading hose to be manually connected by mistake. There is a risk of unlocking the lock mechanism of another hatch that has not been locked. Further, since the conventional device has a configuration in which the upper portion and the outer periphery of the operation handle are covered with a cup-shaped cover, when the operation handle is rotated after unlocking, there is a cover near the driver, which makes it difficult to operate. There is a problem.

Further, in the conventional apparatus, when the operation handle is rotated after the lock is released, the rotation operation is difficult because the ring-shaped frame is provided below the operation handle. As a technique for solving such a problem, there is a technique disclosed by the present applicant in Japanese Patent Application Laid-Open No. Hei 10-211988. This publication discloses a bottom valve lock device in which a lock mechanism of an operation handle is unlocked by a piston operation of an air cylinder device.

In the apparatus disclosed in this publication, an air cylinder device is installed near the operation handle of each bottom valve, and a compressor for generating air pressure and air for supplying air pressure compressed by the compressor to the air cylinder device are provided. It is necessary to arrange a valve unit for switching the piping and air pressure, a control circuit for selectively driving each valve of the valve unit, and the like in the tank truck.

[0009]

However, in the configuration in which the operation handles of the bottom valves of the tank truck are locked or unlocked by using the air cylinder device as described above, the valve shaft of the operation handle of the bottom valve is used. Since the rod engaged with the provided engaging member is directly driven by the air cylinder device to release the lock, the driving force for driving the rod is increased, and there is a problem that the air cylinder device is correspondingly enlarged. .

Furthermore, in the above-described bottom valve locking device for a tank truck, not only the air cylinder device must be provided near the operation handle of each bottom valve, but also a compressor, an air pipe, a valve unit, a control circuit, and the like need to be provided as auxiliary equipment. Therefore, there is a problem that the installation work is troublesome and the manufacturing cost is high. Therefore, an object of the present invention is to provide a bottom valve locking device for a tank truck in which the above problem is solved.

[0011]

In order to solve the above problems, the present invention has the following features. Claim 1
The disclosed invention is provided with a bottom valve provided at each hatch of a tank truck, an operation handle provided at an upper portion of the hatch for opening and closing the bottom valve, and a valve shaft of the operation handle. An engagement member, a first lock portion movably provided so as to engage or disengage with the engagement member, and a movable member in a direction orthogonal to a movement direction of the first lock member. A second lock portion provided movably so as to engage or disengage with the first lock portion; and an electric actuator for driving the second lock portion in the disengagement direction. , Consisting of:

Therefore, according to the first aspect of the present invention, the first lock portion movably provided so as to engage or disengage with the engagement member provided on the operation handle is provided.
To engage with a second lock portion movably provided in a direction orthogonal to the direction of movement of the first lock portion, and to drive the second lock portion in the disengagement direction by an electric actuator to release the lock. Driving the second lock unit requires less driving force of the driving unit at the time of the unlocking operation than driving the first lock unit directly with the driving unit, so that the size of the electric actuator can be reduced. it can. Also, as before, tank lorries have air lines, compressors,
There is no need to provide a valve unit or the like, and mounting work can be performed easily.

According to a second aspect of the present invention, there is provided the bottom valve locking device for a tank truck according to the first aspect, wherein the second lock portion is manually operated in a direction of disengaging from the first lock portion. Movably provided. Therefore, according to the second aspect of the present invention, since the second lock portion is provided so as to be movable by manual operation in a direction of disengaging from the first lock portion, the second lock portion is manually operated even during a power failure. Can be moved in the unlocking direction to unlock the operation handle.

According to a third aspect of the present invention, in the bottom valve locking device for a tank truck of the first aspect, the first locking portion includes a first rod engaged with the engaging member; A first urging member that urges the first rod in an engaging direction of the engaging member, is engaged or disengaged by the second lock portion, and is engaged with the first rod; A second rod that engages with the first rod from a direction opposite to the direction of engagement with the member; and a second rod that is opposite to the engagement direction with a greater force than the first urging member. A second urging member for urging in the direction.

Therefore, according to the third aspect of the present invention, when the bottom valve is unlocked, the second rod is moved in the direction of disengagement so that the second rod is moved by the second urging member. Moves in the direction in which the first rod is disengaged,
The lock of the bottom valve is released by moving the first rod, which has been disengaged by the rod, from the engagement member in the disengagement direction. When the operation handle is rotated in the valve closing direction, the first rod engaged with the engagement member is moved against the first biasing member only by rotating the operation handle. Therefore, the bottom valve is closed.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a gas station and a tank truck. As shown in FIG. 1, underground tanks 1 to 3 for each oil type are buried under the gas station. Each of the underground tanks 1 to 3 stores a different oil type, and in this embodiment, the first underground tank 1 is a gasoline tank, the second underground tank 2 is a light oil tank, The third underground tank 3 is provided as a kerosene tank.

Each of the underground tanks 1 to 3 has a liquid level sensor 4 for measuring the liquid level in order to calculate the amount of oil liquid stored in each tank.
To 6 are provided. The liquid level sensors 4 to 6 are connected to a liquid level gauge 7, and the liquid level gauge 7 is connected to each of the underground tanks 1 to 3 based on signals input from the liquid level sensors 4 to 6 and corresponding to the liquid levels of the underground tanks 1 to 3. 3 is displayed. Further, the liquid level gauge external display 7a connected to the liquid level gauge 7 converts signals output from the liquid level sensors 4 to 6 into digital signals and supplies the digital signals to a loading / unloading console 29 of a tank truck, which will be described later.

Further, lubrication ports 9-1 of each of the underground tanks 1-3.
1 is provided with transmitting units 13 to 15 for detecting that the unloading hose 12 is connected and transmitting a code number set for each of the underground tanks 1 to 3. Note that the unloading hose 12 is provided with a signal line 12a for transmitting signals from the transmitting units 13 to 15 to the tank truck vehicle side.

Reference numeral 21 denotes a tank truck, and a plurality of hatches 2
It has a tank 22 partitioned into 2a to 22g. A plurality of types of oil liquids are loaded in the plurality of hatches 22a to 22g in accordance with the order of the delivery destination. For example, the first and second hatches 22a and 22b are gasoline and the third to fifth hatches. 22
Light oil is loaded in c to 22e, and oil types are loaded in the 6th and 7th hatches 22f and 22g, such as kerosene.

At the bottom of each of the hatches 22a to 22g, there are provided bottom valves 23a to 23g which are manually opened when unloading the oil liquid loaded in each of the hatches 22a to 22g. The bottom valves 23a to 23g are configured to be opened and closed by operation handles 19a to 19g provided on the upper part of the tank 22, and each of the operation handles 19a to 19g.
g is locked by lock mechanisms 20a to 20g to be described later.

The bottom valves 23a to 23g have bottom valve sensors 24a to 24b which output a valve opening detection signal when the valve is opened.
24 g are provided. The first to third bottom valves 23a disposed on the front side (driver's seat side) of the bottom valves 23a to 23g.
To 23c are connected in parallel to the first discharge port 25.
The fourth to seventh bottom valves 23d to 23g disposed on the rear side among the bottom valves 23a to 23g are connected in parallel to the second discharge port 26.

Further, a first solenoid valve 27 and a second solenoid valve 28 are disposed in the upstream pipeline of the first discharge port 25 and the second discharge port 26, respectively. The driver's seat of the tank truck 21 has an unloading console 29 and an intrinsically safe barrier 30.
Are arranged. And the bottom valve sensors 24a to 24g
Transmits a valve opening signal to the unloading console 29 through the intrinsically safe barrier 30, and the first solenoid valve 27 and the second solenoid valve 28
Is opened by a control signal output from the unloading console 29.

FIG. 2 shows a hatch 22a of the tank truck 21.
It is a perspective view which shows a mode at the time of unloading the oil liquid loaded in about 22g. As shown in FIG. 2, oil supply ports 42a to 42g for loading an oil liquid at an oil depot are provided on the upper portions of the hatches 22a to 22g of the tank truck 21. The operation handles 19a-1 of the bottom valves 23a-23g are provided near the fuel ports 42a-42g.
9g and the lock mechanism 2 of each operation handle 19a to 19g
0a to 20g are provided. The operation handles 19a to 19g are attached to upper ends of valve shafts 18a to 18g that penetrate the hatches 22a to 22g in the vertical direction and are connected to valve bodies (not shown) of the bottom valves 23a to 23g. .

When the tank truck 21 arrives at the filling station, the driver connects one end of the unloading hose 12 to the discharge port 2.
5 or 26, and the other end of the unloading hose 12 is connected to the lubrication ports 9-11 of the underground tanks 1-3 of the oil type to be unloaded. When the connection of the unloading hose 12 is completed in this way, the driver operates the operation handles 19 a to 1 on the tank 22.
Of the 9g, the operation handle of the hatch is turned in the valve opening direction. At that time, as for the lock mechanisms 20a to 20g, only those corresponding to the hatch for unloading as described later are unlocked.

FIG. 3 shows that the lock mechanism 20 has the operation handle 19.
FIG. 3 is a perspective view showing a state where the valve shaft is attached to the valve shaft 18.
As shown in FIG. 3, the lock mechanism 20 (20a to 20a)
g) includes an engagement member 44 (44a to 44g) fixed to the valve shaft 18 (18a to 18g) and a valve shaft 18 (18a to 1g).
8g), and a bracket 46 (46a-46g) fixed to a bearing portion 45 (45a-45g) for bearing the engaging member 44 (4) fixed to the bracket 46 (46a-46g).
4a to 44g) to engage with the valve shaft 18 (18a to 18g).
Lock part 47 (47a-47g) for locking the lock
A second lock portion 48 (48a to 48g) for locking the first lock portion 47 (47a to 47g); and an electric actuator 49 (49a to 49g) for driving the second lock portion 48 (48a to 48g). ).

The lock mechanism 20 (20a to 20g)
Is the operation handle 19 (19a to 19g) and the tank 22
The operation handle 19 is attached between the
(19a to 19g) are provided so as not to be in the way when the rotating operation is performed. The bracket 46 includes a bolt 46
By the tightening of A, the bearing 45 is fixed so as to sandwich the outer periphery thereof.

The lock mechanism 20 (20a to 20g)
Locks the engagement members 44 (44a to 44g) with the first lock portions 47 (47a to 47g), and
7 (47a-47g) to the second lock portion 48 (48a-48g).
48g), the second lock portion 48 (48
a to 48 g) can be driven with a relatively small force,
The electric actuator 49 (49a to 49g) is miniaturized and has a compact configuration.

The electric actuator 49 (49a to 49a)
Since 49g) is made of a solenoid, it is not necessary to attach a compressor or an air pipe as in a conventional lock device using an air cylinder device, and the attaching operation can be easily performed. FIG. 4 is a longitudinal sectional view showing the internal structure of the engagement member 44 and the first lock portion 47 provided on the valve shaft 18.
FIG. 5 shows the first lock portion 47 and the second lock portion 4.
It is a top view which shows the positional relationship of No. 8.

As shown in FIGS. 4 and 5, the engaging member 44 includes a fixing portion 50 fixed to the valve shaft 18 and a valve shaft 18.
And a ring-shaped engaging ratchet 52 formed so as to surround the periphery of the fixing portion 50.
The fixing portion 50 of the engagement member 44 is fixed so as to clamp the outer periphery of the valve shaft 18 by tightening the bolt 53. In addition, the engagement ratchet 52 has a plurality of pawls 55 provided on the outer periphery at predetermined intervals. This claw portion 55 is
6 and an inclined portion 55b for moving the rod 56 in the unlocking direction (direction B) when the valve shaft 18 is rotated in the valve closing direction. Become.

The first lock portion 47 can be moved to a lock position where the main body portion 57 fixed to the bracket 46 is engaged with the claw portion 55 of the engagement ratchet wheel 52 or an unlock position where the first lock portion 47 is separated from the claw portion 55. , A second rod 58 slidably fitted on the outer periphery of the first rod 56, and a first rod 56 for urging the first rod 56 in the A direction.
, A second coil spring 60 for urging the second rod 58 in the direction B, and a first operation knob 61 for manual operation screwed into an end of the second rod 58. .

The second coil spring 60 is set so as to have a larger spring force (spring constant) than the first coil spring 59, and holds the second rod 58 at a position displaced in the B direction. I have. The first rod 56 is inserted into a guide hole 58 b penetrating through the inside of the second rod 58, and is engaged by the engagement ratchet 5 by the spring force of the first coil spring 59.
It is held at a lock position that engages with the second claw portion 55.

One end of the first rod 56 has an engagement hook 5
It protrudes in the direction A from the main body 57 so as to engage with the second claw 55, and a flange 56b is provided at the other end. The flange portion 56b is provided with a second rod 5 formed in a hollow shape.
The protruding position in the direction A is restricted by contacting the step 58a formed inside the inside 8. And the first rod 56
A flange 56b is inserted into the second rod 58 so as to be able to move in a space 62 formed between the step 58a and the first operation knob 61.

That is, when the operating handle 19 is rotated in the valve closing direction, the first rod 56 is moved from the locked position where one end is engaged with the pawl portion 55 of the engaging ratchet 52 to the inclined portion 55b. It is slid to the unlocked position where it is pressed and separated from the claw portion 55. As a result, the bottom valve 23 is closed by closing the operation handle 19. However, when the operation handle 19 is rotated in the valve opening direction, one end of the first rod 56 abuts the step 55a of the claw 55, and the valve shaft 18
And, the rotation of the operation handle 19 in the valve opening direction is prevented.

The second rod 58 is slidably inserted into a through hole 57a which penetrates the main body 57 in the directions A and B, and regulates the rotation of the valve shaft 18 in the valve opening direction. ,
When the first operation knob 61 is pressed in the direction A, the first operation knob 61 moves in the engagement direction in which the first operation knob 61 engages with the claw portion 55 of the engagement ratchet wheel 52. When the second rod 58 moves in the direction B, which is the direction of disengagement, due to the spring force of the coil spring 60, the step 5
8a comes into contact with the flange 56a to move the first rod 56 in the same direction.

Therefore, the second rod 58 is automatically moved in the direction B, which is the disengagement direction, by the spring force of the coil spring 60 during the unlocking operation, and the unloading is completed and the bottom valve 23 is closed. At this time, the first rod 56 is moved to the lock position where the first rod 56 is engaged with the claw portion 55 of the engagement ratchet 52 by pressing the first operation knob 61 in the direction A which is the engagement direction. Can be. Thereby, the valve shaft 1
8 and the operation handle 19 are prevented from rotating in the valve opening direction, and can be rotated in the valve closing direction.

The first rod 56 engaged with the engagement ratchet 52 as described above is urged by the coil spring 59 in the engaging direction of the engagement ratchet 52, and is engaged or disengaged by the second lock portion 48. The second rod 58 that is disengaged and engages the first rod 56 in a direction opposite to the direction of engagement between the first rod 56 and the engagement ratchet 52 is subjected to a greater force by the coil spring 60 than the coil spring 59. Accordingly, the second rod 56 is urged in a direction opposite to the engaging direction. Therefore, the bottom valve 23
During the lock release operation, the second rod 58 is moved in the direction of disengagement of the first rod 56 by the coil spring 60 by moving the second lock portion 48 in the direction of disengagement. The lock of the bottom valve 23 can be reliably released by force.

On the other hand, when the operation handle 19 is rotated in the valve closing direction, the first rod 56 is moved against the coil spring 59 in addition to the force required to rotate the operation handle 19. It only takes a little power to
The bottom valve 23 can be closed. FIG. 6 is AA in FIG.
It is a longitudinal cross-sectional view along a line.

As shown in FIGS. 6 and 5, the second rod 58 has an engagement groove 58b on the outer periphery. And, in the state before unloading, this engagement groove 58b has
The lock member 65 of the second lock portion 48 protruding from the C and D directions orthogonal to the sliding direction (A and B directions) of the second rod 58 is engaged. Thereby, the second rod 58
Are locked in the non-slidable state, and are prevented from moving in the direction B, which is the unlocking direction.

Further, as shown in FIG. 5, the lock member 65 engages the first groove 58b of the second rod 58 with the first groove.
The rod 56 is provided so as to come into contact with the claw portion 55 of the engagement ratchet 52 from the opposite direction. Therefore, even if the operation handle 19 attempts to rotate in the valve opening direction, the second rod 58 is firmly fixed to the claw portion 55 of the engagement ratchet wheel 52, and the valve opening operation of the bottom valve 23 can be performed. It is surely blocked.

FIG. 7 is a longitudinal sectional view showing the internal structure of the second lock portion 48. As shown in FIG. 7, the lock member 65 is provided in the casing 66 of the second lock portion 48.
And an electric actuator 49 for driving the lock member 65
Is stored. The electric actuator 49 includes a plunger 67 to which the lock member 65 is connected and a plunger 6.
A coil spring 68 for urging the actuator 7 in the C direction;
A coil 69 is provided so as to cover the outer periphery of the coil 7, and a power supply terminal 70 for energizing the coil 69.

As will be described later, when the coil 69 of the electric actuator 49 of the lock mechanism 20 corresponding to the hatch 22 to be unloaded is energized by being energized, the plunger 67 inserted through the coil 69 is turned on. It is sucked in the direction D by the electromagnetic force. When the plunger 67 moves in the direction D in this way, the lock member 65 connected to the connecting portion 67a of the plunger 67 is driven in the same direction and separates from the engagement groove 58b of the second rod 58.

Thus, the second rod 58 is unlocked by the lock member 65 and becomes movable. Then, the second rod 58 is moved in the direction B, which is the disengagement direction, by the spring force of the coil spring 60, and the first operation knob 61 and the first rod 56 are moved by the pawls of the engaging ratchet 52. It moves in the direction to release the engagement from the portion 55, and the lock of the engagement ratchet 52 is released. Accordingly, the valve shaft 18 and the operating handle 1 are released by the unlocking operation.
No. 9 allows a rotation operation in the valve opening direction.

The casing 6 of the second lock portion 48
Numeral 6 has an explosion-proof structure to energize the coil 69 and the power supply terminal 70, thereby preventing ignition when loading and unloading the oil liquid. The rod 71 provided integrally with the plunger 67 is formed to extend in the direction D so as to pass through a center hole 72 a of a guide member 72 provided on the inner periphery of the coil 69. A second operation knob 73 is attached to the end of the rod 71 so as to protrude from the lid 74 of the casing 66.

A cap 75 for covering the second operation knob 73 is screwed into the central hole 74a of the lid 74. Also,
The cap 75 is usually attached to the lid 74,
The second operation knob 73 cannot be operated without permission. For example, when the electric actuator 49 does not operate due to a power failure or a failure, the operator can remove the cap 75 and manually move the second operation knob 73 in the D direction to move the lock member 65 in the unlock direction. it can. Thereby, the lock of the second rod 58 by the lock member 65 is released, and the second rod 58 moves in the direction B, which is the disengagement direction, by the spring force of the coil spring 60. Then, the engagement of the engagement ratchet 52 with the first rod 56 is released.

After the unloading is completed, the electric actuator 49 is demagnetized and the plunger 67 is turned off by the coil spring 6.
The spring returns to the direction C, which is the engagement direction, with the spring force of No. 8. Here, when the first operation knob 61 provided at the end of the second rod 58 is pressed and slid in the direction A, the first operation knob 61 is locked in the engagement groove 58b formed on the outer periphery of the second rod 58. The tip of the member 65 fits and locks the second rod 58.

This prevents the valve shaft 18 of the bottom valve 23 and the operation handle 19 from rotating in the valve opening direction. In this state, the valve shaft 18 and the operation handle 19 can rotate only in the valve closing direction by the action of the first rod 56 of the first lock portion 48 and the engagement ratchet 52. FIG. 8 shows a block diagram of the unloading console 29.

As shown in FIG. 8, the unloading console 2
9 is an unloading control circuit 31, a storage unit 32, a card reader 3
3, printer 34, display 35, hatch designation key 36a
-36 g, underground tank designation keys 37a-37g, hatch indicator lights 38a-38g, underground tank indicator lights 39a-39
g. The unloading control circuit 31 excites the electric actuator 49 of the lock mechanism 20 corresponding to the hatch 22 of the oil type to be unloaded to release the lock of the second rod 58 of the first lock portion 47, and The opening operation of the bottom valve 23 is enabled.

FIG. 9 shows an example of the storage contents of the master file 40. As shown in FIG. 9, the storage unit 32 stores a master file 40 for identifying the discharge port 25 or 26 for each hatch number. The master file 40 stores data such as a hatch number, a discharge port number, and an oil type. FIG. 10 shows a front view of the unloading console 29.

As shown in FIG. 10, on the front of the unloading console 29, an insertion slot 33a of the card reader 33, a slip discharge port 34a of the printer 34, a display 35, hatch designation keys 36a to 36g, an underground tank designation. Keys 37a-3
7g, hatch indicating lights 38a to 38g, and underground tank indicating lights 39a to 39g are provided. FIG. 11 (A)-
(C) is a diagram schematically showing vehicle reservation data, underground tank data, and unloading state storage area.

The loading card 33 is inserted into the insertion slot 33a of the card reader 33 when unloading at a gas station. This lorry card 41 stores vehicle-specific reservation data as shown in FIG. The vehicle-specific reservation data includes a vehicle number for identifying the vehicle, a hatch number for identifying the hatch, an oil type data indicating an oil type for each hatch, a quantity data indicating a quantity loaded for each hatch, and a delivery destination for each hatch. Customer number data to be identified is stored.

The storage unit 32 of the unloading console 29 stores underground tank data in advance as shown in FIG. This underground tank data is underground tank 1
Underground tank number data identifying each of ~ 3, each underground tank 1
The data is composed of oil type data for identifying each of the stored oil types. In addition, the storage unit 32 of the unloading console 29 stores FIG.
An unloading state storage area as shown in FIG. 1C is provided, and an unloading flag indicating that the unloading is in progress for each of the underground tanks 1 to 3 and an unloading end flag indicating the unloading end are stored. Have been.

Next, with the unloading operation, the unloading console 2
The unloading control processing executed by the 9 unloading control circuits 31 will be described with reference to the flowcharts of FIGS. When the tank lorry vehicle 21 arrives at the gas station, the driver first operates the card reader 3 provided on the unloading console 29.
3. Insert the lorry card 41 into the insertion slot 33a of the third lorry truck 2.
Connect to 1.

Then, lubrication ports 9-1 of underground tanks 1-3
1, one end of the unloading hose 12 is connected, and the other end of the hose 12 is connected to the discharge port 25 or 26 of the tank truck 21. For example, when unloading the gasoline loaded in the hatch 22a into the underground tank 1, one end of the hose 12 is connected to the lubrication port 9, and the other end of the hose 12 is connected to the front discharge port 25. When the connection of the hose 12 is completed in this way, a signal (information) indicating the number of the underground tank 1 or the type of the stored oil is transmitted to the unloading console 29.

Then, the lock mechanism 2 of the hatch 22a
After releasing the lock by 0a, the bottom valve 23a of the hatch 22a is opened, and the start button (not shown) provided on the first solenoid valve 27 is turned on. Also, hatch 2
When the unloading of 2a is completed, the stop button (not shown) provided on the first solenoid valve 27 is turned on.

In step S 1 (hereinafter “step” is omitted), the unloading control circuit 31 sets the unloading console 2
9 into the insertion slot 33a of the card reader 33.
When 1 is inserted, the vehicle number card data stored in the lorry card 41 is read into the unloading console 29, and the oil type loaded in each hatch 22a to 22g of the tank lorry 21 is written into the master file 40. It is memorized.

Next, in S1a, the electric actuator 49 of the lock mechanism 20 corresponding to one hatch in which the oil type to be unloaded is loaded based on the oil type data of the bottom valves 23a to 23g stored in the master file 40. And the plunger 67 is moved in the unlocking direction (D direction). As a result, the lock member 65 connected to the connecting portion 67a of the plunger 67 is driven in the same direction, separated from the engagement groove 58b of the second rod 58, and the lock of the second rod 58 is released.

The second rod 58 is moved by the spring force of the coil spring 60 in the direction B, which is the disengagement direction, and the first rod 56 is engaged with the claw 55 of the engagement ratchet 52. It moves in the releasing direction, and the lock of the engagement ratchet 52 is released. The driver can now use the lock mechanism 2
Operation handle 1 of valve shaft 18 unlocked by 0
9 can be rotated in the valve opening direction. Therefore, the bottom valve 23 of one hatch in which the oil type to be unloaded is loaded
Is opened.

In the next step S2, when the bottom valves 23a to 23g of the oil type to be unloaded are operated to open and the bottom valve sensors 24a to 24g output valve opening detection signals, the next step S2 is performed.
The process proceeds to step 3 to search for the discharge port 25 or 26 to which the opened bottom valves 23a to 23g belong and the oil type. In the next S4, based on the oil type data of the bottom valves 23a to 23g stored in the master file 40, whether the opened bottom valve among the bottom valves 23a to 23g belongs to the front discharge port 25 or the rear side It is determined whether or not it belongs to the discharge port 26.

For example, when the bottom valve 23a of the first hatch 22a loaded with gasoline is opened, the discharge port 25 located on the front side of the data stored in the master file 40 is selected, and the process proceeds to S5. In S5, the discharge port 2
The hatch number belonging to No. 5 is searched. In this embodiment, the hatch numbers belonging to the discharge ports 25 are the first to third hatches. However, in S4, if the opened bottom valve belongs to the rear discharge port 26, STEP 2 (FIG. 1)
4).

In the next S6, the first to third hatches 22
It is determined whether or not any of the bottom valves 23a to 23c provided in the valves a to 22c has already been opened. In S6, if none of the first to third bottom valves 23a to 23c is open, the process proceeds to S7, where the other bottom valves 23a to 23g of the first to seventh hatches 22a to 22g are opened. It is determined whether the valve has been opened.

In S7, if the bottom valves 23a to 23g of the other first to seventh hatches 22a to 22g are not opened, the process proceeds to S8 and the start button (not shown) of the discharge port 25 is turned on. It is determined whether the operation has been performed. And S
In 8, when the start button (not shown) of the discharge port 25 is turned on, the process proceeds to S9, and it is determined whether or not the hose 12 is connected to the discharge port 25. Here, when the hose 12 is not connected to any of the lubrication ports 9 to 11 of the underground tanks 1 to 3 and does not receive the signal transmitted from the transmission units 13 to 15, the connection of the hose 12 is completed. It is determined that there is no abnormality, the process proceeds to S10, and it is notified that there is an abnormality.

However, in S9, the hose 12 is connected to the lubrication port 9 of the gasoline underground tank 1 and
13 is received, the signal transmitted from S1 in FIG.
In step 1, the oil type of the underground tank 1 is determined based on a signal from the transmission unit 13 provided at the lubrication port 9 of the underground tank 1 to which the discharge port 25 is connected through the hose 12. Next S12
Then, it is determined whether the oil type of the hatch of the opened bottom valve matches the oil type of the underground tank to which the hose 12 is connected. If the oil type of the hatch does not match the oil type of the underground tank in S12, the process proceeds to S13 to notify that there is an abnormality.

However, when the oil type of the hatch 22a and the oil type of the underground tank 1 match in S12, the process proceeds to S14, and the discharge port 25 is allowed to be unloaded. And S
Proceeding to 15, the solenoid valve 27 of the discharge port 25 is opened. Thus, unloading from the discharge port 25 is started, and the hatch 22
The oil liquid of a is transferred to the underground tank 1. In S16, as a process during unloading of the oil liquid, for example, a flow rate measurement of the oil liquid unloaded from the discharge port 25 is performed. In the next S17,
It is determined whether the bottom valves 23b to 23g of the other hatches have been opened.

At S17, the other bottom valves 23b to 23g of the hatch
If the valve has not been opened, the process proceeds to S18 and the discharge port 25
It is determined whether or not the stop button (not shown) is turned on. If the stop button (not shown) of the discharge port 25 is off, the process returns to S16 and S16 to S1 until the stop button (not shown) of the discharge port 25 is turned on.
Step 8 is repeated.

However, if the stop button (not shown) of the discharge port 25 is turned on in S18, the flow shifts to S19 to close the solenoid valve 27. Then, in S20, it is determined whether or not all the oil types and quantities to be unloaded at the gas station have been completely unloaded. For example, the unloading schedule is hatch 22
If the oil type and quantity are the same, the lock mechanism 2 is set in S20a.
The 0 electric actuator 49 is demagnetized.

When the electric actuator 49 is demagnetized in this way, the plunger 64 returns in the direction C by the spring force of the coil spring 68. When the first operation knob 61 provided at the end of the second rod 58 is slid by pressing in the direction A, the locking member is inserted into the engagement groove 58b formed on the outer periphery of the second rod 58. The second rod 58 is locked by fitting the distal end of the second rod 58. This prevents the valve shaft 18 and the operation handle 19 of the bottom valve 23 of the hatch from rotating in the valve opening direction.

In this state, the valve shaft 18 and the operating handle 19 of the hatch can be rotated only in the valve closing direction by the action of the first rod 56 of the first lock portion 48 and the engagement ratchet 52. Become. Then, the driver operates the operation handle 19.
Is rotated in the valve closing direction to close the bottom valve 23. This completes the unloading process. Here, the unloading process is completed.

However, if there is any unloading schedule remaining in the hatches other than the hatch 22a, the process proceeds to S21, and the lock mechanism 20 corresponding to the hatch 22b to be unloaded next.
Of the plunger 6 by exciting the electric actuator 49 of
7 is moved in the unlocking direction (D direction). As a result, the lock member 65 connected to the connecting portion 67a of the plunger 67 is driven in the same direction, separated from the engagement groove 58b of the second rod 58, and the lock of the second rod 58 is released.

Then, similarly to the above case, the second rod 58 is moved in the direction B which is the disengagement direction by the spring force of the coil spring 60, and the first operating knob 61 and the first rod 61 are moved. 56 is a claw portion 55 of the engagement ratchet 52
To the direction B for releasing the engagement, and the lock of the engagement ratchet 52 is released. With this, the driver can use the lock mechanism 20.
Handle 19 of valve shaft 18 unlocked by
Can be rotated in the valve opening direction. Accordingly, the bottom valve 23 of one hatch in which the oil type to be unloaded is loaded is opened.

Then, in S21a, it is confirmed by the next bottom valve sensor 24 that the bottom valve 23 has been opened. After that, the process returns to S3 described above, and the processes after S3 are executed. Also,
In the above S6, for example, the bottom valve 23 of the first hatch 22a
If the bottom valve 23b of the second hatch 22b is opened while the valve a is first opened, the process proceeds to S22 and the oil type of the first hatch 22a that has already been opened and the currently opened 2nd hatch 22a It is determined whether or not the oil type of the hatch 22b is the same.

In S22, if the bottom valve 23b of the second hatch 22b is scheduled to be opened this time and the bottom valve 23c of the third hatch 22c loaded with light oil is opened by mistake, if the oil types do not match. Become. In this case, since an accident of mixing different oil species (contamination) occurs, the process proceeds to S23 to notify the abnormality and to release the first solenoid valve 2 of the discharge port 25.
7 is closed.

However, in S22, when the bottom valve 23b of the second hatch 22b is opened this time, the oil types match. In this case, since a different oil type mixing accident (contamination) does not occur, the process proceeds to S24, and it is determined whether or not the discharge port 25 is already unloading. That is, if the start button (not shown) of the discharge port 25 has already been turned on, the process proceeds to S25, and the unloading of the hatch 22b of the bottom valve 23b opened this time is also permitted.

Then, the flow shifts to S16, where the unloading from the discharge port 25 is continued, and the processing after S16 is executed. In S7, the other hatches 22a to 22c of the first to seventh hatches are also provided.
When any of the bottom valves 23a to 23g of 22g is opened, the process returns to S3 and executes the processes of S3 to S7 again.

If the start button (not shown) of the discharge port 25 is not turned on in S8, the process returns to S7, and the bottom valves 23a to 23g of the other first to seventh hatches 22a to 22g are again operated. It is determined whether the valve has been opened. If it is determined in step S24 that the start button (not shown) of the discharge port 25 has not been turned on, the process proceeds to step S7 to determine whether the bottom valve of another hatch has been opened, and performs the processes in and after step S7. Execute

The process of the flowchart shown in FIG. 12 is a process of unloading the second discharge port 26. That is, in S4, when one bottom valve opened based on the oil type data of the bottom valves 23a to 23g stored in the master file 40 belongs to the rear outlet 26,
The process moves to S26 in FIG.

For example, the fourth hatch 2 loaded with light oil
When the bottom valve 23d of 2d is opened, the outlet 26 on the rear side is selected from the data stored in the master file 40, and the process proceeds to S26. Then, in S26, the discharge port 2
The hatch number belonging to No. 6 is searched. In this embodiment, the hatch numbers belonging to the discharge ports 26 are No. 4 to No. 7.

In the next S27, the hatch 2 from the fourth to the seventh
It is determined whether any of the bottom valves 23d to 23g provided in 2d to 22g has already been opened. This S27
If none of the fourth to seventh bottom valves 23d to 23g are open, the flow proceeds to S28, and the other first to seventh hatch 22a to 22g bottom valves 23a to 23g are opened. Is determined.

If the bottom valves 23a to 23g of the other first to seventh hatches 22a to 22g are not opened in S28, the process proceeds to S29 and the start button (not shown) of the discharge port 26 is turned on. It is determined whether the operation has been performed. When the start button (not shown) of the discharge port 26 is turned on in S29, the process proceeds to S30 and the discharge port 2
It is determined whether the hose 12 is connected to the hose 6. Here, the hose 12 is connected to the lubrication ports 9-11 of the underground tanks 1-3.
If no signal is transmitted from the transmission units 13 to 15 without being connected to any of the above, it is determined that the connection of the hose 12 has not been completed, and the process proceeds to S31 to notify that there is an abnormality. .

However, when the hose 12 is connected to the lubrication port 10 of the underground tank 2 and the signal transmitted from the transmission unit 12 is received in S30, the process proceeds to S32, and the discharge port 26 is connected through the hose 12. The oil type of the underground tank 2 is determined based on a signal from the transmission unit 14 provided at the oil inlet 10 of the underground tank 2. In the next S33, it is determined whether the oil type of the hatch 22d provided with the opened bottom valve 23d and the oil type of the underground tank 2 to which the hose 12 is connected match. If the oil type of the hatch does not match the oil type of the underground tank in S33, the process proceeds to S34 to notify that there is an abnormality.

However, if the oil type of the hatch 22d and the oil type of the underground tank 2 match in S33, the process proceeds to S35, and the discharge port 26 is allowed to be unloaded. And S
Proceeding to 36, the solenoid valve 28 of the discharge port 26 is opened. Thus, the unloading from the discharge port 26 is started, and the hatch 22
The oil liquid of d is transferred to the underground tank 2. In S37, as a process during unloading of the oil liquid, for example, the flow rate of the oil liquid unloaded from the discharge port 26 is measured. In the next S38,
It is determined whether the bottom valves 23a to 23c of the other hatches have been opened.

In S38, the bottom valves 23a to 23c of the other hatches
If the valve has not been opened, the process proceeds to S39 and the discharge port 26
It is determined whether or not the stop button (not shown) is turned on. If the stop button (not shown) of the discharge port 26 is off, the flow returns to S37, and S37 to S3 until the stop button (not shown) of the discharge port 26 is turned on.
Step 9 is repeated.

However, if the stop button (not shown) of the discharge port 26 is turned on in S39, the flow shifts to S40 to close the solenoid valve 28. Then, in S41, it is determined whether all the oil types and quantities to be unloaded at the gas station have been completely unloaded. For example, the unloading schedule is hatch 22
If the oil type and quantity are d, the lock mechanism 2 is set in S41a.
The solenoid 64b of 0 is demagnetized and the valve shaft 18 of the hatch, which has been completely unloaded, is locked (see FIG. 4). This completes the unloading process.

However, if there is any unloading schedule remaining for hatches other than the hatch 22d, the process goes to S42 to excite the electric actuator 49 of the lock mechanism 20 corresponding to the hatch 22 to be unloaded next. Plunger 67
In the unlock direction (D direction). As a result, the lock member 65 connected to the connecting portion 67a of the plunger 67 is driven in the same direction, separated from the engagement groove 58b of the second rod 58, and the lock of the second rod 58 is released.

Then, the second rod 58 is connected to the coil spring 6
In the direction B in which the first operation knob 61 and the first rod 56 are disengaged from the claw 55 of the engagement ratchet wheel 52 while being moved in the direction B which is the disengagement direction by the spring force of 0. It moves and the lock of the engagement ratchet 52 is released. Thus, the driver can turn the operation handle 19 of the valve shaft 18 unlocked by the lock mechanism 20 in the valve opening direction. Accordingly, the bottom valve 23 of one hatch in which the oil type to be unloaded is loaded is opened.

Then, in S42a, it is confirmed by the next bottom valve sensor 24 that the bottom valve 23 has been opened. After that, the process returns to S3 described above, and the processes after S3 are executed. Also,
In the above S27, for example, the bottom valve 2 of the fourth hatch 22d
If the bottom valve 23e of the fifth hatch 22e is opened with 3d being opened first, the process proceeds to S43 and the oil type of the fourth hatch 22d that has already been opened and the fifth valve that has been opened this time are opened. It is determined whether or not the oil type of the hatch 22e is the same.

In S43, if the bottom valve 23e of the fifth hatch 22e is erroneously scheduled to be opened this time and the bottom valve 23f of the sixth hatch 22f loaded with kerosene is opened, the oil type is determined to be inconsistent. Become. In this case, since an accident of mixing different oil species (contamination) occurs, the process proceeds to S44 to notify the abnormality and to release the second solenoid valve 2 of the discharge port 26.
8 is closed.

However, in S43, when the bottom valve 23e of the fifth hatch 22e is opened this time, the oil types match. In this case, since a different oil type mixing accident (contamination) does not occur, the process proceeds to S45, and it is determined whether or not the discharge port 26 is already unloading. That is, if the start button (not shown) of the discharge port 26 has already been turned on, the process proceeds to S46, and the unloading is permitted also for the hatch 22e of the bottom valve 23e that has been opened this time.

Then, the flow shifts to S47, where the unloading from the discharge port 26 is continued, and the processing after S37 is executed. In step S28, the other hatches 22a to 1-7
If any one of the bottom valves 23a to 23g is opened, the process returns to S3 and returns to S3, S4, S26 to S28.
Execute the processing of

If it is determined in step S29 that the start button (not shown) of the discharge port 26 is not turned on, the process proceeds to step S2.
8 and again the other hatches 22a-22
It is determined whether or not the bottom valves 23a to 23g of g are opened. If the start button (not shown) of the discharge port 26 is not turned on in S45, the process proceeds to S28, and it is determined whether or not the bottom valve of another hatch is opened, and the process proceeds to S28.
The processing after 28 is executed.

In the above embodiment, when the type of oil to be unloaded is determined, the valve shaft 1 corresponding to the corresponding hatch 22
8 is unlocked, but the hatch 22 and the underground tank to be unloaded first are set by operating the switch on the console, and the valve shaft 18 is set only when the oil types of the two match.
The lock may be released. In the above embodiment, two discharge ports 25, 26 are provided in the tank truck 21.
However, the present invention is not limited to this, and the present invention has a configuration in which three or more discharge ports are provided as long as one discharge port is connected in parallel to a plurality of hatches. Can also be applied.

[0091]

As described above, according to the first aspect of the present invention, the first lock movably provided so as to engage or disengage with the engaging member provided on the operation handle. The second lock portion is engaged with a second lock portion movably provided in a direction orthogonal to the direction of movement of the first lock portion, and the second lock portion is driven by an electric actuator in the disengagement direction to lock. In order to release, the driving force of the electric actuator at the time of the unlocking operation is smaller when the second lock unit is driven than when the first lock unit is directly driven by the electric actuator. Can be planned. Further, since the electric actuator is used as the driving means, there is no need to provide an air line, a compressor, a valve unit, and the like in the tank truck, so that the mounting operation can be easily performed.

According to the second aspect of the present invention, the second
The lock portion of the first lock portion is provided so as to be movable by manual operation in the direction of disengagement from the first lock portion. Therefore, even in the event of a power failure, the second lock portion is manually moved in the unlock direction to unlock the operation handle. can do. Also,
According to the third aspect of the present invention, the first engaging member engages with the first engaging member.
Is urged in the engagement direction of the engagement member by the first urging member, and is engaged or disengaged by the second lock portion, and the engagement between the first rod and the engagement member is established. A second rod that engages with the first rod from a direction opposite to the mating direction,
The second rod is urged by the second urging member in a direction opposite to the engaging direction with a larger force than the first urging member. By moving the portion in the disengagement direction, the second rod is moved in the direction of disengagement of the first rod by the second urging member, and the bottom is reliably moved by the strong force of the second urging member. While the valve can be unlocked, when the operation handle is turned in the valve closing direction, in addition to the force required to turn the operation handle, the operation handle is pressed against the first biasing member. Only a small force is required to move one rod and the bottom valve can be closed.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention.

FIG. 2 is a perspective view showing a state where an oil liquid loaded on a hatch of a tank truck is unloaded.

FIG. 3 is a perspective view showing a state in which a lock mechanism is attached to a valve shaft of an operation handle.

FIG. 4 is a longitudinal sectional view showing an internal structure of an engagement member provided on a valve shaft and a first lock portion.

FIG. 5 is a plan view showing a positional relationship between a first lock portion and a second lock portion.

FIG. 6 is a longitudinal sectional view taken along line AA in FIG.

FIG. 7 is a longitudinal sectional view showing an internal structure of a second lock unit.

FIG. 8 is a block diagram of the unloading console.

FIG. 9 is a diagram showing an example of storage contents of a master file.

FIG. 10 is a front view of the unloading console.

FIG. 11 is a diagram for describing data contents stored in a storage unit.

FIG. 12 is a flowchart of a process executed by an unloading control circuit of the unloading console.

FIG. 13 is a flowchart of a process executed after the process of FIG. 12;

FIG. 14 is a flowchart of a process executed after the process of FIG. 13;

[Explanation of symbols]

 1-3 Underground tank 4-6 Liquid level sensor 7 Liquid level gauge 9-11 Lubrication port 12 Unloading hose 13-15 Transmission unit 18 (18a-18g) Valve shaft 19 (19a-19g) Operation handle 20 (20a-20g) ) Lock mechanism 21 Tank truck 22a to 22g Hatch 23a to 23g Bottom valve 24a to 24g Bottom valve sensor 25 First discharge port 26 Second discharge port 27 First solenoid valve 28 Second solenoid valve 29 Unloading console 31 Unloading control circuit 44 (44a to 44g) Engaging member 45 (45a to 45g) Bearing 46 (46a to 46g) Bracket 47 (47a to 47g) First lock 48 (48a to 48g) Second lock 49 (49a to 49g) Electric actuator 50 Fixing part 51 Mounting hole 52 Claw wheel for engagement 55 Claw part 56 First rod 57 Main body Part 58 Second rod 59 First coil spring 60 Second coil spring 61 First operating knob 65 Lock member 67 Plunger 69 Coil 71 Rod 72 Guide member 73 Second operating knob 74 Cover 75 Cap

Claims (3)

[Claims] 1. A bottom valve provided at each hatch of a tank truck, an operation handle provided at an upper part of the hatch for opening and closing the bottom valve, and a valve shaft of the operation handle. An engagement member, a first lock portion movably provided to engage or disengage the engagement member, and movable in a direction orthogonal to a movement direction of the first lock portion. A second lock portion provided movably so as to engage or disengage with the first lock portion; and an electric actuator for driving the second lock portion in the disengagement direction. A bottom valve locking device for a tank lorry, comprising: 2. The bottom valve lock device for a tank truck according to claim 1, wherein the second lock portion is movably provided by a manual operation in a direction in which the second lock portion is disengaged from the first lock portion. Features a bottom valve locking device for tank trucks. 3. The bottom valve lock device for a tank lorry according to claim 1, wherein the first lock portion includes a first rod that engages with the engagement member, and the first rod engages the first rod. A first urging member that urges in the engaging direction of the mating member, is engaged or disengaged by the second lock portion, and is opposite to the engaging direction of the first rod and the engaging member. A second rod that engages the first rod from a direction, and a second biasing the second rod in a direction opposite to the engagement direction with a greater force than the first biasing member. A bottom valve locking device for a tank truck, comprising: an urging member;