JPH0440063Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a locking device used to protect a fuel tank valve of a greenhouse heating device.

[Conventional technology] In agricultural greenhouses, the cultivation space is surrounded with glass or vinyl sheets to prevent the radiant heat absorbed from the sun's rays from escaping and dissipated by air currents, and the cultivation space is surrounded by glass or vinyl sheets to prevent the radiant heat absorbed from the sun's rays from escaping and dissipating through the airflow. By adding this, we ensure the optimal indoor temperature for cultivated crops.

However, recently there have been many incidents in which the valve installed in the middle of the oil pipe leading from the fuel tank to the burner of the heating system is closed without permission at night, when it is difficult to monitor, and the supply of fuel to the burner is stopped. It has occurred. If the fuel supply is cut off at night, when radiant heat from the sun's rays cannot be utilized, the indoor temperature will drop rapidly and significantly, which will have a serious negative impact on the growth of cultivated crops, and will affect the variety and growth stage of the crops. Sometimes they die overnight,
This is causing enormous damage to farmers.

[Problem to be solved by the invention] Therefore, the purpose of the invention is to provide a locking device for a fuel tank valve that has a simple structure but can accurately prevent anyone other than the farmer from closing the valve. be.

[Means for Solving the Problems] The following description will be made using the reference numerals in the attached drawings. The fuel tank valve locking device of the present invention has the following features:
The operating handle 4 of the valve 3 provided on the oil feed pipe 2 from the fuel tank 1 and the shaft rod 5 of the operating handle 4
a cover body 8 that accommodates the entire bearing cylinder part 6 of the valve 3 into which the valve 3 is fitted in a cavity 7 that is open on the lower surface;
The cover body 8 is fitted and fixed to the outside of the bearing cylinder part 6.
A receiver 10 having a receiving groove 9 on the outer wall thereof is housed in the cavity 7 of the key 11;
When rotor 12 is rotated, latch bolt 1
Numeral 3 comprises a lock unit 15 that engages and disengages from the receiving groove 9 through a through hole 14 in the inner wall surface of the cavity 7.

[Operation] After inserting the key 11 into the keyhole 16 of the lock unit 15 and unlocking the rotor 12 from the outer cylinder 17, when the rotor 12 is turned in a predetermined direction by a predetermined angle with the key 11, the rotor 12 is turned. A latch bolt 13 interlocked with the lower end portion slides linearly in the radial direction of the rotor 12 and is drawn into the guide hole 14.

Due to this retraction operation, the tip of the latch bolt 13 separates from the receiving groove 9 of the receiver 10, so that the cover body 8 is unlocked from the receiver 10. Therefore, when the cover body 8 is pulled up away from the fuel tank 1, the receiver 10 and the operating handle 4 are entirely exposed.

By rotating the operating handle 4, the valve body 18 fixed to the lower end of the shaft 5 is moved into the valve hole 1.
By opening and closing 9, the valve 3 is set to the oil supply state or the oil cutoff state.

After setting the desired state, the cover body 8 is attached by aligning the center positions of the operation handle 4, the receiver 10, and the cavity 7. When the cover body 8 is completely pushed down until the lower end surface 20 of the cover body 8 approaches the upper surface of the oil pipe 2, the latch bolt 13 of the lock unit 15 engages with the receiving groove 9 of the receiver 10 again. As a result, the cover body 8 is relocked to the oil pipe 2 via the receiver 10 and the valve 3, and the valve 3 is protected from unauthorized operation.

[Embodiment] In the illustrated embodiment, a spring holding screw tube 23 is screwed into the small diameter portion of the upper end of the bearing tube 6, and a screw is inserted between the main body portion of the bearing tube 6 and the screw tube 23. The receiving groove portion 24 is formed in an annular shape. The cylindrical receiver 10 is provided with three screw holes 21 extending through it in the radial direction at intervals of 120 degrees, and the tip of the screw 22 screwed into the screw hole 21 is connected to the screw receiving groove 24.
is engaged in. Therefore, the receiver 10 is fixed to the bearing cylinder portion 6 in a non-removable manner. The valve 3 is screwed and connected to each end of the oil pipes 2, 2.

The cover body 8 has a vertically elongated cavity 25 in parallel with the cavity 7.
is formed protrudingly, and the lock unit 15 is inserted into the cavity 2.
5 and is fixed. In this embodiment, a lock unit 15 incorporating an axial pin tumbler type lock mechanism is used, but the lock mechanism is not limited to this, and any known lock mechanism can be selected and used as appropriate.

In the passive groove 26 at the base end of the latch bolt 13,
The cam projection 27 at the lower end of the rotor 12 is engaged, and when the rotor 12 is rotated with the key 11, the cam projection 27 presses against the wall surface of the passive groove 26.
The latch bolt 13 slides back into the through hole 14.
When the rotor 12 returns to reverse rotation, the latch bolt 13
The through hole 14 is opened by the biasing force of the compression coil spring 28 from
protrude from

[Effects of the invention] As described above, the valve locking device of the present invention includes, in addition to the receiver 10 that is fitted and fixed to the outside of the bearing cylinder part 6 of the valve 3, the bearing cylinder part 6 and the operation handle 4. Although it has a simple structure consisting of a cover body 8 that accommodates the entire receiver 10 in the cavity 7 and a lock unit 15 that is housed and fixed in the cover body 8, the latch bolt 13 of the lock unit 15 is connected to the cavity 7. When the cover body 8 is engaged with the receiving groove 9 on the outer wall of the receiver 10 through the through hole 14 on the inner wall surface, the cover body 8 is inserted into the oil pipe 2.
Since the fuel tank 1 is locked, it is impossible for anyone other than the grower in possession of the key 11 of the lock unit 15 to access the operating handle 4.
The supply of oil from the country will not be stopped without permission.

Further, in the valve locking device according to claim (1), the cavity 7 of the cover body 8 is formed to have a circular cross section concentric with the bearing cylinder portion 6, the operating handle 4, and the receiver 10,
Since the receiving groove 9 is annularly formed on the outer peripheral surface of the receiving metal holder 10, the cover body 8 is rotatable around the cavity 7, so that a person who does not have the official key 11 can turn the cover body 8 to lock the lock. Even if you try to undo it, the cover body 8
The cover body 8 cannot be removed and the operation handle 4 cannot be turned.

[Brief explanation of the drawing]

FIG. 1 is a front view of a valve locking device according to an embodiment of the present invention, FIG. 2 is a right side view of the locking device, FIG. 3 is a plan view of the locking device, and FIG. FIG. 4 is a bottom view of the locking device, and FIG. 5 is a sectional view taken along line A--A in FIG. 3. FIG. 6 is a front view of the fuel tank and oil pipe equipped with the locking device, and FIG. 7 is a longitudinal sectional view of the locking device when the cover body is in the locked state. 1...Fuel tank, 2...Oil pipe, 3...
Valve, 4... Operating handle, 5... Shaft rod, 6...
...Bearing cylinder part, 7...Cavity, 8...Cover body, 9...
... Reception groove, 10 ... Receiver, 11 ... Key, 12 ... Rotor, 13 ... Latch bolt, 14 ... Guide hole, 15 ... Lock unit, 16 ... Key hole, 17
... Outer cylinder, 18 ... Valve body, 19 ... Valve hole, 20 ...
... lower end surface of cover body, 21 ... radial screw hole, 22 ... fixing screw, 23 ... screw tube for spring presser, 24 ... screw receiving groove, 25 ... hollow part,
26... Passive part, 27... Cam protrusion, 28... Biasing spring.

Claims (1)

[Claims for Utility Model Registration] (1) The operating handle 4 of the valve 3 provided on the oil pipe 2 from the fuel tank 1 and the bearing cylinder portion 6 of the valve 3 into which the shaft 5 of the operating handle 4 is fitted. A cover body 8 is entirely housed in a cavity 7 opened on the lower surface, and a receiving groove 9 is formed in the outer wall of the cover body 8 which is fitted and fixed to the outside of the bearing cylinder part 6 and accommodated in the cavity 7 of the cover body 8. A lock that is housed and fixed in the cover body 8 and that allows the latch bolt 13 to engage and disengage from the receiving groove 9 through the through hole 14 in the inner wall surface of the cavity 7 when the rotor 12 is rotated with the key 11. A fuel tank valve locking device consisting of a unit 15. (2) Claim (1) wherein the cavity 7 of the cover body 8 is formed to have a circular cross section concentric with the operating handle 4, the bearing cylinder 6, and the receiver 10, and the receiver groove 9 is formed in an annular shape on the outer peripheral surface of the receiver 10. ) Valve locking device described in ).