JPS6145779A - Temperature-sensitive actuator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a temperature-sensitive actuator using a shape memory alloy;
In particular, the present invention relates to a temperature-sensitive actuator that can be operated reliably with a force greater than the shape recovery force of a shape memory alloy when the temperature rises above a set temperature, and can be easily restored when the temperature is lower than the set temperature.

[Conventional technology]

In recent years, it has become mandatory to install fireproof shutters in buildings and other structures.In particular, since hot air flows in ducts when a fire occurs, as shown in Figures 2 (A) and (I), 11) A blade (12) that closes the interior is rotatably provided, and although not shown in the figure, the blade (12) is closed by a spring or the like.
), apply force in the direction of closing and return the force to the handle (
13) to open the blade (12), and in this state, the return handle (13) is locked by the stopper pin (4) of the temperature-sensitive actuator (a).

The temperature-sensitive actuator <a> has a cylinder (1) with a cap (2) at one end and a bearing (3) at the other end, as shown in Fig. 3, and has one end protruding from the cap (2). -C Stopper pin (4) that locks the return handle (13) and forms a collar (4a) in the cylinder (1)
Insert the pin (4) into the lock (2) and tsuba (4a).
A compression spring (5) was inserted in between to apply a force in the direction of the bearing (3) to the pin (4), and a moisture sensitive plate (15) was attached to the end of the bearing (3) using low melting point solder or the like. The one with a stop cover (14) attached is used. This temperature-sensitive actuator (a) is connected to the duct (11)
It is installed so that it protrudes inside the duct (11) in the event of a fire.
) When the temperature-sensitive plate (15) melts away from the hot air flowing inside the cylinder, the stopper pin (4) is retracted into the cylinder (1), so the return handle (13) comes off and the blade (12) closes the inside of the duct (11).

[Problem that the invention seeks to solve]

Fire prevention equipment such as V-ivy is required once or twice a year, according to the provisions of the Fire Service Act.
Fire shutters using the above-mentioned temperature-sensitive actuator (...) have a temperature-sensitive plate that leaches out during inspection, so the plate must be replaced after inspection, which is a hassle. Furthermore, depending on the installation conditions, it may cause malfunctions, and it may not work even at high temperatures, so improvements are desired.

[Failure to solve the problem]

In view of this, as a result of various studies, the present invention uses a shape memory alloy, which operates reliably with a force greater than the shape recovery force of the shape memory alloy when the temperature rises above the set temperature, and easily recovers at a low temperature above the set temperature. This is a temperature-sensitive actuator that can be mounted on a cylinder with a key on one end and a bearing on the other end. A stopper pin with a groove is inserted into the pin, and a compression spring is inserted between the cap and the flange of the pin to apply a force in the J direction to the bearing. A shape memory alloy spring is installed between the stopper and the rear end of the stopper, and a bias spring is installed between the bracket attached to the bearing and the stopper, and the shape memory alloy spring is compressed and deformed to lock the stopper tip in the groove. When the temperature rises above a set temperature, the shape memory alloy spring recovers its shape, the C stopper is pulled out of the groove, and the pin is moved in the direction of the bearing.

That is, the actuator of the present invention, as shown in FIGS. 1(a) and 1(b), has a cylinder (1) with a locking knob (2) at one end and a bearing 4-J(3) at the other end (=J, cylinder(
1) has one end protruding from the gap (2), has a collar (4a) in the cylinder (1), and has a flange (4a) in the bearing (3).
b) Insert the stopper pin (4) provided with the pin (4).
) A compression spring (
5) Extrapolate. The bearing (3) has a stopper (6) with a cylindrical hole (6b) in the center that passes through the bearing (pull part).
A shape memory alloy spring (7) is provided between the flange (6a) formed at the rear end of the spring (6) and the bearing (3).
) is the mounting number, a bracket (8〉) with screws (10) fixed to the bearing (3) is provided, and a bias spring ( 9
), the shape memory alloy spring (7) is compressed and deformed, and the tip of the l-flange (6) is locked in the groove (4b).

[For production]

Shape memory base metal memorizes a certain shape above the set temperature (Nuru7 site transformation point), and even if it deforms below the set temperature, it will recover to the memorized fixed shape by heating above the set temperature. However, below the set temperature, it becomes soft and easily deforms.
It has the characteristic of becoming hard above the set humidity.N
I-Tl alloys and C11-Zn-A soft alloys are known, and the set temperature can be easily adjusted by adjusting the blending ratio of alloying elements or adding a small amount of a third element. The actuator of the present invention is a combination of this shape-memory alloy spring and a bias spring, and is used as a temperature-sensitive actuator for a duct's fire prevention valve. The shape memory alloy spring is compressively deformed by the Noss spring, but if the temperature of the shape memory alloy spring rises above the set temperature due to hot air during a fire or inspection, the spring will recover its shape. , the bias spring becomes stronger (the stopper is pulled out from the vortex of the pin), so (the pin is moved in the direction of the bearing due to the strong compression spring), the return handle comes off, and the vane closes.

When the temperature inside the duct rises below the set temperature, the shape memory alloy bone no longer becomes soft again and is compressed and deformed by the bias spring. If an external force is applied to this sharpening pin and it is moved in the U-1 top direction, the l-flange will engage with the groove of the pin, and the pin can be easily restored to the state protruding from the camp. Note that ordinary spring materials may be used for the bias spring and the compression spring.

〔Example〕

A wire with a diameter of 1 mm made of a Ni-Ti shape memory alloy was wound into a coil at a set temperature of 50°C, and fixed with a jig with 30% elongation.
Shape memory treatment was performed for a minute.

-) Screw a 17 mm thick 0 key (/) to one end of a cylinder with an inner diameter of 1511 + Iis length 83 mm to a depth of 6 mm, and screw a bearing () of thickness ?9 # to a depth of 6 mm to the other end. It has a 5mm thick tsuba that protrudes from the cap by 7mm and is located 59mm inward from the cap.
A stopper pin with a concave groove was inserted into the stopper pin, and a compression spring was inserted between the cap and the flange.

The bearing has a cylindrical hole with a diameter of 3 mm and a 7-lung stopper at the rear end.
Attach the above shape memory alloy spring between 9 and the bearing part. [Insert several bias springs between the cylindrical hole of the plate and the flange, and apply external force to the pin from the side of the bearing. Figure 1 (a), (
The temperature-sensitive actuator of the present invention shown in ['') was created.

This actuator is connected to the duct fire prevention system T shown in Figure 2.
The operating characteristics of the shutter were examined by using it with seven shutter actuators. First, the actuator of the present invention was placed so as to protrude into the duct, and the return handle of the vane for closing the duct was engaged with the pin protruding from the cap, and the temperature of the air flowing inside the duct was raised. Target 5
The pin is pulled into the cylinder at a temperature of 1f at 0°C, and the handle comes off (the feather 1f closes the duct. Next, the air flowing in the duct is returned to room temperature, and an external force is applied to the pin (the stopper is inserted into the groove of the pin). Then, the pin was protruded from the receptacle and the return handle with the blade was locked on it.This operation was extremely easy. , As a result, Oku 506c
The c-pin was pulled into the cylinder and the vane closed the duct.

This operation was repeated several dozen times, but the same results were obtained each time.

〔Effect of the invention〕

In this way, the actuator of the present invention operates reliably as a temperature-sensitive sensor for fire prevention shutters, etc., and can be easily restored without the need for replacement parts. Although it takes advantage of the shape recovery force, it can be operated with a much larger force than the recovery force, making it extremely effective as a temperature-sensitive actuator.

[Brief explanation of drawings]

Figures 1 (a) and (b) show an example of the actuator of the present invention. C1 (a) is a side sectional view, (b) is a front view, and Figures 2 (a) and ([]) are duct 1, This figure shows an example of a fire prevention shutter, in which (a) is a side view, (b) is a cross-sectional view, and Fig. 3 is an example of a conventional) 7 shutter.
+7ii figure. a...Moisture sensitive actuator...Cylinder 2...Ki 11 knob 3...
Bearing 4-way stopper pin 4a...Tsuba
4b...Groove 5...Compression spring
6... S1 to collar 7... Shape memory alloy spring 8... Black cut 9... Bias spring 11
...Duct 12...Blade 13...Return handle 14...Stop cover 15...
Temperature play 1-2 (A) Figure (B) Figure 3 C') O14

Claims (1)

[Claims] A stopper pin with one end protruding from the cap, a flange inside the cylinder, and a groove in the bearing part is inserted into a cylinder that has a cap on one end and a bearing on the other end, and a stopper pin is inserted between the cap and the flange of the pin. A compression spring is inserted externally to apply force in the direction of the bearing, a stopper that engages with the groove is provided on the bearing, a shape memory alloy spring is installed between the bearing and the rear end of the stopper, and a spring made of shape memory alloy is installed between the bracket attached to the bearing and the stopper. A bias spring is attached to the spring, the shape memory alloy spring is compressed and deformed to lock the stopper tip in the groove, and when the temperature rises above the set temperature, the shape memory alloy spring recovers its shape and the stopper is pulled out from the groove, and the pin is removed. A temperature-sensitive actuator that moves in the direction of the bearing.