JP3380888B2 - Fire protection tank iron lid - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an iron lid provided at a water intake of a fire protection water tank, and mainly to a locking device for the iron lid.

[0002]

2. Description of the Related Art The iron lid provided at the intake of a fire protection water tank is
Normally, it is rarely opened and closed, but in an emergency it is necessary to manage so that it can be opened immediately without fail, and it is highly preferable to have a locking function for management. Locking function (locking function) on the conventional fire protection water tank iron lid
There are some that have a special opening and closing tool for opening and closing.

[0003]

Since the conventional iron lid having a locking function uses a dedicated opening / closing tool, if the opening / closing tool is not used when performing fire extinguishing activities, the water in the fire protection tank will be removed. I can not use it. For example, if you forget to carry the special opening / closing tool, or if you have a fire engine that rushed to the fire extinguishing site from another area to support fire fighting activities, you cannot open the iron cover of the fire protection water tank, and There is a problem that it may happen that it cannot be used immediately. It is an object of the present invention to provide a fire protection water tank iron lid that includes a locking device and can solve the above-mentioned problems.

[0004]

The fire protection water tank iron lid of the present invention is provided with a locking device that can be unlocked by using a fire hydrant opening / closing key used for opening / closing the fire hydrant. The fire hydrant open / close key is a steel tool for opening / closing the open / close valve of the fire hydrant, that is, for opening / closing the faucet of the water supply pipe for fire extinguishing, with a member having a square hole of a specified size with the square hole at the end side. Is welded to one end and a bar is welded to the other end to form a T-shape, and a handle is provided. The fire hydrant has a rectangular protruding shaft for opening and closing the valve, and the valve can be opened and closed by fitting the square hole into the protruding shaft and rotating the handle. This fire hydrant opening and closing key is common in Japan, and it is well known that it is always prepared for fire trucks and that it is always close to fire-fighting personnel. Therefore, since it is equipped with a lock device and convenient for normal management, it can also be unlocked using a fire hydrant key that is always close to fire-fighting personnel. In that case, it can be reliably unlocked, and fire extinguishing activities will not be hindered.

The lock device has a lock shaft that engages with a square hole of the fire hydrant key by pushing the fire hydrant key downward at a predetermined position on the upper surface of the iron lid in the closed state, and the lock shaft has the lock shaft. It is preferable to have a projection that can be engaged with the receiving frame side, and lock and unlock operations can be performed by rotating the fire hydrant key whose square hole is engaged with the lock shaft by a predetermined angle. When the fire hydrant key with the square hole engaged with the lock shaft is rotated by a predetermined angle when the iron lid is closed, the protrusion rotates and the locked state is engaged with the receiving frame side and the unlocked state is disengaged from the receiving frame side. Can be changed.

Further, the lock device has a hole pierced vertically up and down near the edge of the iron lid and is rotatably sized by inserting a fire hydrant key. A rotatable head is provided at the upper end that can be fitted into the square hole of the fire hydrant key, and a shaft extends downward from the head, and the lower end is rotatable on a support formed on an iron lid. Between the support shaft and the lock hook, the lock shaft being supported by the lock shaft, the lock hook having a protrusion protruding outward and provided on the shaft portion of the lock shaft so as to be rotatable and slidable in the axial direction. It is configured to include a spring that is provided to push up the locking hook and hold it at a predetermined raised position, and an engaged portion that is recessed in the receiving frame that is locked by the projection of the locking hook. Is good. In this configuration, the locked state is engaged with the engaged portion in which the locking hook is recessed while being pushed up by the spring and the movement in the rotation direction is restricted, so even if the iron lid vibrates, the locked state is locked. The hook does not move to the unlocked state. That is, the locked state is reliably retained against vibration.

A boss is provided between the hole of the iron lid and the head of the lock shaft so as to be able to descend together with the locking hook, and the upper surface of the boss is formed to be lower than the opening surface of the iron lid of the hole so as to form a step. It is preferable that the configuration is provided. With this configuration, the position of the fire hydrant key located before being pushed in, that is, the portion to be pushed in has a small step, so it is easy to position the fire hydrant key, and even if it is released quickly, it can be unlocked securely and quickly. it can.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to FIGS. This fire protection water tank iron lid 1 is circular, and is supported by a ring-shaped receiving frame 2, and a hinge (not shown) that connects the iron lid 1 to the receiving frame 2 so as to be openable and closable is provided on one side in a predetermined diameter direction. Yes, and the lock device 3 is provided on the other side.
As shown in FIGS. 1 to 3, the lock device 3 includes a hole 10 and a lock shaft 1.
1, locking hook 12, spring 13, engaged portion 14, boss 1
It is composed of 5 etc.

As shown in FIGS. 1 to 3, the hole 10 is formed by vertically penetrating near the edge of the iron lid 1, and is rotated by inserting a tip 17 of a fire hydrant key 16 described later. It is possible size. As shown in FIGS. 1 to 3, the lock shaft 11 is provided rotatably at a fixed position with its center aligned with the hole 10 and its upper end surface aligned with the upper surface of the iron lid 1. The upper end has a square-shaped cross-section head portion 19 that can be fitted into the square hole 18 of the tip portion 17 of the fire hydrant key 16, and has a shaft portion 20 that extends downward from the head portion 19 and has a slightly narrow quadrangular cross-section. A lower end portion is rotatably supported by a support portion 21 formed on the iron lid 1. In FIG. 2, 22 is a hole for earth removal. Locking hook 12
As shown in FIGS. 1 to 3, is a shape of a cylindrical container which is turned upside down and is provided with a projection, and a square hole 23 is provided at the center of the bottom of the container. It has a projection 24 which is rotatably fitted in the portion 20 together with a square hole 23 and which is provided so as to be slidable in the axial direction and which projects outward.

The spring 13 is a coil spring, and the supporting portion 2
1 is provided between the lock hook 12 and the lock hook 12, and the lock hook 12 is pushed up and held at a predetermined raised position. In addition, reference numerals 26 and 27 shown in FIG. 2 are convex portions positioned in contact with the inner hole of the end portion of the spring 13, and the lower convex portion 26 has a ring-like shape and is divided into spaces. It is provided in the shape of a circle, and this division is also a shape for earth removal. The engaged portion 14 is shown in FIGS.
As shown in FIG. 3, when the projection 24 of the locking hook 12 is rotated to the receiving frame 2 side with the iron lid 1 closed, the locking hook 12 is engaged with the receiving frame 2 to be locked. It is formed as a downward recess. Therefore, the rotation of the protrusion 24 engaged with the engaged portion 14 is restricted by the inner surfaces of both sides of the recess, and the protrusion 24 cannot be rotated unless it is displaced downward against the spring 13 and comes out of the recess.

As shown in FIGS. 1 to 3, the boss 15 is provided between the hole 10 of the iron lid 1 and the head 19 of the lock shaft 11 so as to be able to descend together with the locking hook 12, and the upper surface of the boss 15 has the hole 10. Step 2 slightly lower than the iron lid opening surface, that is, the upper surface 28 of the iron lid 1.
It is formed so low that it forms 9. On the outer periphery of the lower end of the boss 15, a projecting peripheral edge 3 that engages with the step 30 of the lower enlarged portion of the hole 10.
1 is provided so that it does not come out upward but can move downward. The groove 32 on the outer periphery of the boss 15 is for forming a void for earth removal. That is, when sand grains or the like enter, they are dropped downward so as not to hinder the downward displacement. The fire hydrant opening / closing key 16 is as shown in FIG. 4 (a). It is made of steel and has a member for forming the tip portion 17 having a square hole 18 of a predetermined size. A handle 34 is provided by welding one end of 33 and welding a bar member at the other end so as to form a T shape.

The lock device 3 thus constructed is normally in the locked state shown in FIGS. That is, in the locked state, the iron lid 1 is closed, the protrusion 24 of the locking hook 12 is engaged with the engaged portion 14 of the receiving frame 2, and the protruding peripheral edge 31 of the boss 15 abuts the step 30 of the hole 10. It is in a state of being. To unlock from this locked state, the steps are performed in the order shown in FIGS. First, as shown in FIG. 4A, the tip 17 of the fire hydrant key 16 is brought into contact with the upper surface of the boss 15 so that the square hole 18 is fitted to the head 19 of the lock shaft 11, and the handle 34
Is operated to push down against the spring 13. As a result, the boss 15 and the locking hook 12 descend as shown in FIG. In this state, since the protrusion 24 of the locking hook 12 has not yet rotated, it is at the position of FIG. 4 (e) shown in the plan view, and this rotational position is 0 °. When the handle is rotated counterclockwise in the plan view from the state of FIG.
About 90 after passing through the 45 ° rotation position shown in (c) and (f).
Since it reaches the rotation position of ° and stops by abutting on the stopper 35 formed in the portion of the iron lid 1 where the support portion 21 is provided,
If you remove the fire hydrant key 16 upward as it is,
As shown in (d) and (g), the locking hook 12 and the boss 1
The spring 5 moves to its original height by the action of the spring 13 and stops. This height position is regulated by the protruding edge 31 of the boss 15 contacting the step 30. Further, the protrusion 24 of the locking hook 12 at this time is in the recess 36 provided on the iron lid 1 side. In this unlocked state, the iron lid 1 can be opened with the handle 40 shown in FIGS.

Although the above-mentioned operation is an unlocking operation, it can be locked by a completely reverse operation to this unlocking operation. FIG. 5 is a developed view showing the swivel movement of the protrusion 24 about the lock shaft 11 described with reference to FIG. That is, for example, when unlocking, the protrusion 24 descends from the locked position of 0 ° located in the recess of the engaged portion 14, pivots, and rises to 9 °
The unlocked position of 0 ° is reached. It should be noted that it is possible to move up and down while turning at both end positions of this turning. Therefore, in this configuration, the fire hydrant key 16 may be rotated without being pushed down.

This fire protection water tank iron lid 1 has a lock device 3,
Normally, it can be locked so that it can not be opened and closed unnecessarily, it is effective for fire prevention water tank management including danger prevention, and it is a fire hydrant key that is always stocked in fire trucks or always carried when fighting fire. Since it can be easily unlocked and the lid can be opened using 16, there is no problem in fire fighting activities.

Although the boss 15 is formed separately from the locking hook 12 in the above-described embodiment, the boss 15 and the locking hook 12 may be integrally formed in some cases, and the boss 15 and the locking hook 12 have the same function. Is obtained.

[0016]

Since the invention according to claim 1 can be unlocked by using the fire hydrant key, when the fire protection water tank iron lid is opened to carry out the fire fighting, the lock can be reliably unlocked and the fire fighting can be performed. It has the effect of not hindering. Also, the iron lid vibrates
Even if the locking hook does not move to the unlocked state, it vibrates.
As a result, the locked state is reliably retained. The invention according to claim 2 is positioned before pushing the fire hydrant key.
There is a small step where you push it
Since it is easy to position the fire hydrant key, hurry up
Even when unlocked, it has the effect that it can be unlocked reliably and quickly.
It

[Brief description of drawings]

FIG. 1 is a partial plan view including a lock device portion of an iron lid and a receiving frame showing an embodiment of the present invention.

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

FIG. 3 is a left side view corresponding to FIG. 1, in which the receiving frame is shown in phantom.

FIG. 4 is a view for explaining an unlocking operation of the lock device of the same embodiment, wherein (a) to (d) show locking hooks and bosses shown together with the fire hydrant key when viewed in the same direction as FIG. FIG. 3 is an explanatory view of different states, (e) is a plan view of a locking hook corresponding to (a) and (b), (f) to (c), and (g) to (d).

FIG. 5 is a development view showing a turning movement locus of the protrusion of the locking hook about the lock shaft of the embodiment, together with the engaged portion 14 and the recess 36.

[Explanation of symbols]

1 Fire protection water tank iron lid 2 receiving frame 3 lock device 10 holes 11 lock shafts 12 lock hooks 13 springs 14 Engagement part 15 Boss 16 fire hydrant key 17 Tip 18 square holes 19 head 20 Shaft 21 Support 23 Square Hole 24 protrusions 28 Iron lid top surface 29 steps 30 steps 31 Edge 34 handle 40 handles

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-8-4040 (JP, A) JP-A-9-125435 (JP, A) Actually opened 60-32450 (JP, U) Actually opened 55- 147271 (JP, U) Actual development Sho 57-197543 (JP, U) Registered utility model 3053675 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) E02D 29/14 E03B 9/02

Claims (2)

(57) [Claims] 1. An iron lid for a fire protection water tank equipped with a lock device that can be unlocked by using a fire hydrant opening / closing key used for opening / closing the fire hydrant .
And the locking device penetrates vertically near the edge of the iron lid.
A hole that is pierced and can be rotated by inserting a fire hydrant key
And the center of the hole is aligned with the hole so that it can rotate at a fixed position.
It has a head at the upper end that can be fitted into the square hole of the fire hydrant key.
It has a shaft extending downward from its head and the lower end is an iron lid.
A lock shaft rotatably supported by the formed support part, and its
Installed on the shaft of the lock shaft so that both can rotate and slide in the axial direction.
A locking hook having a protrusion protruding outwardly,
It is provided between the support part and the lock hook, and pushes up the lock hook.
The spring that is held in the predetermined raised position and the locking hook.
Engagement provided on the receiving frame that locks when the protrusion of the hook engages
A fire protection water tank iron lid comprising: 2. A fire protection water tank iron lid according to claim 1.
The lock hook between the hole of the iron lid and the head of the lock shaft.
The upper surface of the hole is lower than the iron lid opening surface of the hole.
Providing a boss that is low so as to make a small step
A fire protection water tank iron lid that is characterized by that .