JPH0538388Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" The present invention relates to a display conversion device for signs, and more specifically, for example, road signs installed in places where there is a risk of freezing during the cold season. The present invention relates to a display conversion device that selectively converts display contents according to changes in environmental temperature at an installation location.

"Prior Art" Conventionally, in a box whose one side is a sign board, such as a display conversion device for a road sign, a display window is provided on the sign board, and an axis parallel to the back side of the transparent window is provided inside the box. In addition, a triangular prism-shaped or triangular cylindrical movable display body is provided rotatably around the axis, a temperature sensor detects a temperature change in the installation environment, and a drive device that operates according to the detected temperature moves the movable display body. The structure is such that one of the different displays on each side of the movable display body is selectively displayed from the display window by rotating the movable display body, and the driving source of the drive device is a solar battery (for example, a
Kg, applicable voltage 6V) is used.

In other words, each side of the movable display is marked with a different message such as "Be careful when driving,""Reduce your speed," and "Beware of freezing." The corresponding one of the three types of displays is selected and displayed by comparing the temperature with the set temperature.

``Problems to be Solved by the Invention'' In the conventional technology, display conversion is performed by operating the movable display body using a drive device using a battery as a drive source, which has the drawback of increasing installation costs and increasing the price. Since the movable display body ceases to operate when the battery voltage runs out, the movable display body must be operated manually, which poses problems such as requiring labor and making it difficult to change the display in a timely manner.

In addition, in order to rotate the rotating body in response to a predetermined temperature change in the installation space, we use a shape memory alloy and attachments such as springs and weights that act in the opposite direction of the force when the shape memory alloy undergoes reverse transformation at a predetermined temperature. The use of a biasing member is known, for example, as disclosed in Japanese Utility Model Application Publication No. 62-55614.

However, the technology disclosed in the above publication is
The device rotates the wiper that wipes away dirt, dust, dirt, etc. from the surface of the reflector of the line-of-sight guide, and there is no means to regulate the amount of movement of the wiper when it rotates, so this is not the case with the conventional method described above. Even if it is used as it is as a drive source for a movable display body in a display conversion device, it is not possible to accurately select and display different types of displays from the display window.

An object of the present invention is to provide a display conversion device that solves or improves the above-mentioned problems.

``Means for Solving the Problems'' In order to achieve the above-mentioned purpose, the present invention uses a rotatable predetermined movable display body provided in a box as a shape memory alloy when the shape memory alloy reversely transforms into martensitic material at a predetermined temperature. A means for rotating in forward and reverse directions is employed using a force and a biasing member that constantly biases in the opposite direction of this force.

When the movable display body rotates in one direction due to the biasing force of the biasing member, one type of the display on the movable display body is brought to a state where it stops facing the display window of the signboard. A stopper is provided to suppress the biasing force of the biasing member.

In addition, when the shape memory alloy undergoes martensitic reverse transformation, the one type of display of the movable display body is opposed to the display window, and the other type of display of the movable display body is opposite to the display window. The movable display body is arranged to rotate until it faces the display window.

Furthermore, the biasing member and the shape memory alloy are pulled together via a rope or wire that is hung or wound around a circular rotation guide that rotates together with the movable display body.

"Function" For example, when the temperature of the installation environment of the sign is not a predetermined set temperature, the movable display body rotates in one direction due to the biasing force of the biasing member, but the biasing force is suppressed by the stopper. Therefore, one of several types of displays on the movable display body is displayed from the display window of the signboard.

On the other hand, when the environmental temperature reaches the predetermined set temperature of the shape memory alloy, the alloy restores to its memorized shape by reverse martensitic transformation, and this restoring force causes the movable display body to rotate in the other direction, causing other movements in the movable display body. is displayed from the display window.

The biasing member and the shape memory alloy have a structure in which they are pulled together via a rope or wire attached to the outer periphery of a circular rotation guide that rotates together with the movable display body. At the time of reverse transformation, the movable display body is rotated from a state where one type of display on the movable display body faces the display window to a state where another type of display on the movable display body faces the display window. As such, it is easy to place accurately and properly.

In other words, by adjusting the length of the rope or wire portion according to the amount of transformation of the shape memory alloy at the set temperature, the amount of transformation and the indication on the sign board can be converted from one indication to another indication. The amount of rotational movement of the movable display body required for this can be matched very easily.

"Example 1" FIGS. 1 to 3 are an example of the present invention, and show an example in which the present invention is applied to a road sign.

The rectangular sign board 3 has a display surface on its surface, and display windows 31 and 3 which are variable display sections in the vertical direction.
1 is provided, followed by fixed displays 3a and 3b displaying characters ``Note'' and ``Note'' at equal intervals. The display windows 31, 31 in this embodiment are covered with transparent acrylic plates.

In this embodiment, the sign plate 3 constitutes one side of a vertically long box 1 having a strong structure made of a corrosion-resistant metal such as an aluminum alloy.
A column 2 made of an aluminum alloy tube is fixed to the lower surface of the column.

On the back side of the sign board 3, that is, in the box 1,
A variable display body 4 made of a rotary plate is rotatably supported by a shaft 41 attached to the inner wall of the box 1 so as to face the back surface of the sign board 3. "Freeze" and "Yui" are displayed at intervals corresponding to the display windows 31 and 31 in one direction.
Displays 4a and 4b are attached, and other "running",
"Row" indications 4c and 4d are attached.

A rotation guide 45 is formed integrally with the display body 4 on the outer periphery of the movable display body 4.
A rope 42 is attached to the terminal.

A coiled shape memory alloy 51 is fixed to one end of the rope 42, and the other end of the shape memory alloy is attached to a bracket 1 whose lower end is attached to the inner wall of the box 1.
It is fixed at 1.

A biasing member 52 made of a weight is fixed to the other end of the rope 42, and this biasing member 52 is pushed by a shelf-shaped stopper 53 provided inside the box 1.
The biasing force is regulated.

If slipping occurs between the rope 42 and the rotation guide 45 due to the material, the rope 42 may be replaced as necessary.
is fixedly attached to one point on the upper end of the outer periphery of the rotation guide 45 in the attitude shown in FIG. 3, or the rope 42 is wound around the outer periphery of the rotation guide 45 several times.

1 to 3 show the shape memory alloy 51 in an elongated state (martensitic transformation state), and the display on the signboard 3 shows "freezing" and "freezing" appearing on the display windows 31, 31. Characters and continuous fixed display 3
The characters a and 3b, ``caution'' and ``caution,'' make the overall display of a ``frozen state.''

In this example, the Af point (martensite reverse transformation temperature) of the shape memory alloy 51 is set to the temperature at which the road normally begins to freeze, and the amount of restoration when the shape memory alloy 51 restores (shrinks) to its memorized shape ( The amount of martensite reverse transformation) is set to match the amount of movement when the movable display body 4 rotates 90 degrees.

Therefore, when the temperature at the installation location becomes equal to or higher than the Af point, the shape memory alloy 51 restores its memorized shape,
This restoring force pulls the rope 42 in the direction of the alloy 51 against the load of the urging member 52, and the movable display body 4
Rotate 90 degrees and the display windows 31, 31 will show "Run"
The display is converted into a "line" display, and the sign board 3 as a whole becomes a "drive caution" display.

On the other hand, when the temperature at the installation location decreases to below the Ms point (martensitic transformation temperature), the shape memory alloy 51 stretches as shown in the figure, and the movable display body 4 returns to the state shown in the figure, which is the opposite of the above. Display window 31, 3
The display 1 is converted to "freeze" and "freeze", and the display on the signboard 3 changes to "beware of freezing" as a whole.

Even when the sign board 3 of this embodiment is horizontally long, the above-mentioned structure can be adopted as is, and the movable display body 4 is not limited to a circular plate, but can have other planar shapes, and the movable display body 4 does not have a small diameter. Set up a pulley,
This pulley can also be implemented as a rotating guide.

A spring can be used instead of a weight for the biasing member 52. In this case, instead of the stopper 53 as described above, a pin (not shown) is protruded from the back surface of the movable display 4, and this pin A stopper (not shown) provided in the box is structured to regulate the amount of tension of the biasing member.

"Embodiment 2" FIGS. 4 and 5 show other embodiments in which the display conversion device according to the present invention is applied to road signs. The structure of the box 1 and the structure of the box 1 are the same as those of the previous embodiment.

The movable display 4 of this embodiment is 43 parallel to an axis provided perpendicularly within the box 1, and adjacent ones facing in the circumferential direction centered on the axis 43 have different angles. It has a plurality of surfaces, each surface has a different display, and is arranged to freely rotate around the shaft 43.

In addition, this movable display body 4 is connected to a shape memory alloy 51.
The display windows 31 and 3 are rotated in one direction by the biasing member 52 and rotated in the other direction by the biasing member 52.
This is a structure that converts the display of 1.

In this embodiment, the shaft 43 is rotatably supported by a bearing 47 fixed to the upper inner wall of the box 1 and a bearing 48 on the bracket 12 fixed to the inner wall of the box 1 below the bearing 47, and the shaft 43 is movable with an angular cross section. The display body 4 is fixed by connecting pieces 44, 44 so as to be parallel to the shaft 43, respectively.

Further, in this embodiment, the rotation guide 45 is fixed at a position below the movable display body 4 on the shaft 43,
The rope 42 is wound around this guide 45 once or several times in a tensioned state on both sides, a shape memory alloy 51 is attached to one end of the rope and pulled in one direction, and the other end is biased by a coiled tension spring. The member 52 is attached and configured to be pulled toward the other side, and the pulley 4
The pin 46 protruding from the lower surface of the bracket 12 abuts against a stopper 53 erected on the bracket 12, so that the urging force of the urging member 52 is restricted.

In the state shown in Figure 5, the temperature at the installation location is low and the shape memory alloy 51 is elongated (martensitic transformation).
The display on the sign board 3 is "Beware of freezing", but when the temperature rises above the Af point of the shape memory alloy 51, the alloy 51 restores its memorized shape and the movable display body 4 moves as shown in Figure 4. It rotates 90 degrees clockwise, and the display on the sign board 3 is changed to "Be careful when driving." When the temperature drops below the Ms point of shape memory alloy 51,
The display on the sign board 3 is again converted to "Caution for freezing".

In the display conversion device of Embodiment 1, both sides of the box 1 can be used as sign boards, and both sides of the movable display body 4 can be used.

In the device of Example-2, the axis 43 of the movable display body 4
It is possible to form display surfaces on all sides of the box 1 (for example, the display body 4 is configured in the shape of a square cylinder or a square column), and both sides of the box 1 can be used as a sign board.
A movable display body shaped like an equilateral triangular prism or an equilateral triangular cylinder can also be used.

Moreover, the structure for operating the movable display body 4 in Example-2 can be implemented almost as is even when the sign board 3 is used in a horizontally elongated manner.

"Operation" The display conversion device according to the present invention uses a shape memory alloy and a biasing member to operate the movable display body, so it can be manufactured at a very low cost, and the drive source uses electric means. Since it does not use batteries, there is no need to worry about running out of batteries.

In addition, a stopper is provided to suppress the biasing force of the biasing member, and the shape memory alloy is arranged so that the rotation angle of the movable display body that matches the display conversion and the amount of deformation of the shape memory alloy match. Therefore, the display is converted accurately so that the display on the movable display body and the display window match at the time of conversion.

Furthermore, since the shape memory alloy and the biasing member are pulled together by a wire or rope attached to the outer periphery of the rotation guide, the amount of deformation of the shape memory alloy and the rotation angle of the movable display body can be adjusted as described above. It is extremely easy to arrange the shape memory alloy so that the

[Brief explanation of drawings]

FIG. 1 is a partial front view showing an embodiment of the display conversion device according to the present invention, FIG. 2 is a longitudinal sectional view of FIG. 1, and FIG. 3 is a sectional view taken along arrow A-A in FIG. 2. ,
FIG. 4 is a plan sectional view showing another embodiment, and FIG. 5 is a sectional view taken along the arrow BB in FIG. 4. Explanation of main symbols in the figure: 1 is the box, 13 is the guide, 2 is the support, 3 is the sign board, 31 is the display window, 4
4 is a movable display body, 4a to 4d are different displays, 41 and 43 are shafts, 45 is a rotation guide, 42 is a rope or wire, 51 is a shape memory alloy, 52 is a biasing member, and 53 is a stopper.

Claims (1)

[Claims for Utility Model Registration] (1) A box 1 in which a display window 31 is provided on a sign plate 3 forming the surface, and at least two different types of indications are attached at separate positions on the surface, and each of the aforementioned indications is displayed by rotation. a movable display body 4 rotatably supported in the box so as to form a rotation locus such that the display window 31 of the sign board 3 moves to a position opposite to the display window 31 of the sign board 3; a biasing member 52 that biases the movable display body 4 to always rotate in one direction; and when the movable display body 4 rotates in one direction due to the bias of the bias member 52, the movable display body 4 a stopper for suppressing the biasing force of the biasing member 52 so that one of the displays stops facing the display window 31 of the signboard 3; , from a state in which the one kind of display of the movable display body 4 faces the display window 31 to a state in which another kind of display of the movable display body 4 faces the display window 31; 4, the biasing member 52 and the shape memory alloy 51 are connected to a rope or wire 42 attached to the outer periphery of a circular rotation guide 45 that rotates together with the movable display 4. A display conversion device for signs, characterized in that the device is tensioned through the display. (2) The movable display body 4 is a display in the signs according to claim 1 of the utility model registration claim, in which the movable display body 4 faces the back surface of the sign board 3 and the display is made on the surface facing the back surface. conversion device. (3) The movable display body 4 is rotatably supported vertically or horizontally with respect to the box 1, and the movable display body 4 has a plurality of movable display bodies 4 which are arranged in different directions so as to be able to face the back surface of the sign plate 3 by rotation. A display conversion device for signs according to claim 1, which has surfaces along the axial direction, and has different indications attached to the plurality of surfaces.