JPS6217954Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a water pressure/water amount detection switch device.

The main purpose of this system is to use a battery-powered shutter hoist motor to operate a shutter installed at the entrance of a building or store when a fire or power outage occurs in a building, store, etc. and the power is cut off. In the switch device used for shutter hoisting, the switch operates by accurately detecting the constant water pressure and amount of water ejected from the fire hose, and performs specified functions such as supplying emergency power to the shutter hoisting motor. An object of the present invention is to provide a highly accurate water pressure/water amount detection device from a fire hose, which enables reliable operation.

An embodiment of the present invention will now be described in detail with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a substantially bottomed cylindrical cylinder having a water supply port 2 into which a fire hose (not shown) is inserted on a part of the outer peripheral surface near the bottom plate 3; A threaded portion 4 is carved on the inner circumferential surface of the open axial end. The interior of this cylinder 1 is divided into two parts along the axial direction, one of which forms a water supply part 5 having the water supply port 2,
The other side forms the drive section 6 having the open end.

The water supply section 5 and the drive section 6 are separated by a flange-shaped partition wall 7 that stands uniformly inward from the inner peripheral surface of the cylinder 1, and the inner peripheral edge of the partition wall 7 separates the water supply section A communication hole 8 between the drive unit 5 and the drive unit 6 is formed. Further, in the peripheral wall 9 of the cylinder 1 forming the drive section 6, a drainage port 10 in the form of an elongated hole is bored along the axial direction of the cylinder 1.

Inside the drive unit 6 is a piston 11 whose side surface is approximately T-shaped.
is disposed slidably along the axial direction of the cylinder 1. The piston 11 includes a sliding disc 12 that is housed in close contact with the inner circumferential surface of the cylinder 1, and a piston rod 13 that is connected to the central axis of the sliding disc 12 toward the threaded portion 4. The piston rod 13 extends to the outside of the cylinder 1 through the center of an adjusting body 18, which will be described later. At the tip of the piston rod 13,
Operation protrusions 14 and 15 are protruded at appropriate intervals in the axial direction of the piston rod 13, and
In the moving direction of the operating protrusions 14 and 15, that is, in the moving direction of the piston rod 13 from the sliding disc 12 toward the tip of the piston rod 13, and at a position close to the moved piston rod 13, a first switch such as a micro switch is installed. second switch 16,
17 will be installed as husband. The actuator of the first switch 16 is disposed close to one of the operating protrusions 14, while the actuator of the second switch 17 is located between the actuator of the first switch 16 and the operating protrusion 14. They are disposed in front of the operation convex portion 15 with an interval longer than the interval between the two.

The adjusting body 18 is composed of a body part 19 which is slidably passed through the piston rod 13, and a flange part 20 which is connected to the body part 19 and is screwed into the threaded part 4 of the cylinder 1. The entire body can move forward and backward in the axial direction of the cylinder 1. Further, a spring 21 such as a coil spring is interposed between the flange portion 20 of the adjusting body 18 and the sliding disc 12 of the piston 11, so that the adjusting body 18 is moved toward the open end of the cylinder 1. It is always elastically energized.

To explain its operation, first, water is supplied from the water supply port 2 by a fire hose at a constant pressure and amount, and this water fills the water supply section 5, and the amount increases further and is driven through the communication hole 8. The sliding disk 12 of the piston 11 in the section 6 is pressed. As a result, the piston 11 gradually moves toward the left in FIGS. 1 and 2 against the resilient restoring force of the spring 21. Immediately after the piston 11 moves, the operating protrusion 14 protruding from the piston rod 13
presses the actuator of the first switch 16 adjacent to it, and issues a signal to an external circuit (not shown). When the water supply to the water supply section 5 continues thereafter, the piston 11 further moves to the left in the figure,
As mentioned above, the first switch 16 and the operation protrusion 14
The operating protrusion 15 presses the actuator of the second switch 17, which is provided in the moving direction of the operating protrusion 15 at a distance longer than the distance between the switch and the operating protrusion 15, and issues a signal to another external circuit (not shown). . During this time, if the water amount and water pressure supplied to the water supply section 5 are less than a certain value, the water that has flowed into the drive section 6 while pressing the piston 11 will be discharged from the drain port 10, causing the piston 11 to move. is stopped and the second switch 17 is not closed. Therefore, the second
In order to close the switch 17, a preset water pressure and a constant amount of water must flow into the drive unit 6 via the water supply unit 5. In this sense, the water supply unit 5, drive unit 6, and drainage The spout 10, the piston 11, and the second switch 17 constitute a kind of water pressure/water amount detection device from a fire hose. In addition, since the elastic restoring force of the spring 21 can be freely adjusted by moving the adjustment body 18 forward and backward,
The pressing force of the sliding disc 12 of the piston 11, which moves against the water pressure of the water supplied to the drive unit 6, can be changed by moving the adjusting body 18 back and forth.
The water pressure sufficient to close the switch 17 can be freely set.

Figure 3 shows an application example of the device for detecting water pressure and water amount from a fire hose according to the present invention.This example is used when a fire or power outage occurs in a building or store, etc., and electricity cannot be supplied as described above. This is a case where the present invention is used to wind up a shutter closed at the entrance of a building or the like using a shutter winding motor driven by a storage battery. In other words, when a firefighter arrives at the scene of a fire, etc., inserts a fire hose into the water supply port 2 exposed on the outer wall W of a building (see Figure 1), and a constant water pressure is ejected from the fire hose. The invention is used to detect the amount of water and drive the winding motor of the shutter. In FIG. 3, A is a water pressure/water amount detection device from a fire hose according to the present invention, and the first one of the water pressure/water amount detection device A from this fire hose is
When the switch 16 is closed, the alarm control device B is activated. An alarm device C such as a buzzer or a lamp is connected to this alarm control device B, and the operation of this alarm device C notifies that some input has been applied to the water pressure/water amount detection switch device A and the piston 11 has operated. . That is, the input includes not only the case of water from a fire hose in the event of a fire, but also the case of the piston 11 being driven by a malicious prank. Therefore, in the present invention, the alarm device C can also perform a crime prevention function. When the water supply to the water supply unit 5 continues thereafter, the second switch 17 is closed in the water pressure/water amount detection device A from the fire hose, and a detection signal is issued, but this detection signal is transmitted to the subsequent time circuit. Added to D. This time limit circuit D outputs an output signal only when the detection signal continues to occur for a certain period of time, in other words, only when water is supplied to the water supply port 2 at a certain water pressure and amount for a certain period of time. Emitted. The output signal of the time limit circuit D is transmitted to the subsequent contact switching circuit E.
The contact F is switched by a relay or the like in this contact switching circuit E. Contact F is connected to supply commercial power to the shutter hoisting motor G in normal times, and as mentioned above, when a certain level of water pressure and water volume is detected by the present invention when power cannot be supplied due to a fire, etc. Switch to
Emergency power from a charger H, a storage battery I, and an inverter J connected to a commercial power source is supplied to a hoisting motor G. Incidentally, power is supplied to the time limit circuit D and the contact switching circuit E from the storage battery I.

In this way, the device for detecting water pressure and amount of water from a fire hose according to the present invention detects only a certain amount of water pressure and amount of water from the fire hose even when electricity cannot be supplied due to a fire, etc., and the shutter is activated by the storage battery. This drives the winding motor and enables the shutter to wind.

As described above, according to the present invention, there is provided a cylinder equipped with a water supply section, a drive section, and a drain port, a slidable piston disposed in the drive section, and an elastic force that moves toward the water supply section with respect to the piston. It consists of a spring that provides a certain amount of pressing force, an adjustment body that adjusts the elastic force of this spring, and first and second switches that are sequentially closed by a moving piston rod. By appropriately selecting the position and area of the switch and the position of the switch, it is possible to configure a switch device that operates external circuits and various devices only when a certain water pressure and amount of water is supplied to the water supply section. This has the effect of completely preventing malfunctions due to mischievous inputs or erroneous inputs, such as water supply inputs or air pressure inputs that are less than the above-mentioned fixed water supply input.

As mentioned above, since the first switch can be used for the alarm and the second switch for the main operation, it is possible to issue an alarm when there is a mischievous or erroneous input, which is extremely effective in terms of crime prevention. be.

In addition, when the present invention is used to control the hoisting motor of a shutter in the event of an emergency such as a fire, as mentioned above, the water pressure and amount of water ejected from a fire hose may differ depending on the municipality having jurisdiction over the fire service. Even if there is a problem, it has the versatility of being able to detect a predetermined water pressure and water amount by changing the position of the adjusting body or the second switch, and has various effects such as extremely high detection accuracy.

[Brief explanation of the drawing]

The figure shows one embodiment of the present invention.
The figure is a plan view, FIG. 2 is a cross-sectional view of the main part taken along line XX in FIG. 1, and FIG. 3 is a block diagram showing an example of application of the present invention. DESCRIPTION OF SYMBOLS 1... Cylinder, 2... Water supply port, 5... Water supply part, 6... Drive part, 9... Peripheral wall, 10... Drain port, 11... Piston, 12... Sliding disk, 13
... Piston rod, 16 ... First switch,
17...Second switch, 18...Adjusting body, 21
...Spring, A...Water pressure/water amount detection device from a fire hose.

Claims (1)

[Scope of utility model registration request] Water supply part 5 equipped with water supply port 2 from a fire hose
and a driving part 6 communicating with the water supply part 5. Inside the driving part 6, there is a sliding disc 12 that is in close contact with the peripheral wall 9, and the sliding disc 1.
A slidable piston 11 is disposed coaxially with the piston 2 and a piston rod 13 facing the open axial end of the cylinder 1, and the sliding disk 12 is inserted into the drive section 6. A spring 21 engaged with an adjusting body 18 disposed so as to be movable back and forth along the axial direction of the cylinder 1 elastically presses the water supply section 5 at all times, so that the sliding disc 12 A drainage port 10 is provided in the peripheral wall 9 on the movement route.
At the same time, in the moving direction of the piston rod 13 from the sliding disc 12 toward the tip of the piston rod 13, there are first and Second switches 16 and 17 are provided respectively, and only when a certain amount of water is supplied to the water supply section 5, the piston rod 13, which is pressed and moved by the water, switches the second switch to the second switch.
A device for detecting water pressure and water amount from a fire hose, characterized in that a switch 17 is closed.