JP2521013B2 - Freezing display labeling device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a freeze display marking device for warning a driver or a road administrator of freezing of a road surface that occurs in winter.

[0002]

2. Description of the Related Art As a conventional freeze marking device, there is a technique disclosed in Japanese Utility Model Laid-Open No. 52-142392.

That is, a device for detecting the temperature at which the road surface freezes is provided, and when the set temperature is sensed, a sign for warning the road surface freezes to light up the displayed characters and at the same time a rotation warning light or a flashing warning light. Is the one that works.

On the other hand, a reflective marker device which clearly indicates the existence of a roadside zone by a retroreflective surface is known from Japanese Utility Model Laid-Open No. 58-10913.

[0005]

In the case where the rotation warning light or the blinking warning light is activated at the same time when the above-mentioned sign is turned on and the displayed character is raised, an external power supply is required, and the power supply is controlled. If the device is overturned due to a strong wind, a vehicle collision, or the like, a display warning that the road surface is frozen cannot be made thereafter.

Further, in the reflective sign device which clearly indicates the existence of the roadside belt by the retroreflective surface, the existence of the left and right road shoulders can be known by the white or yellow color, but it is limited to the display of the road width.

[0007] On the other hand, as another prior art, the actual development of Sho 62-
There are techniques disclosed in Japanese Patent No. 12612 and Japanese Patent Publication No. 54-19760.

The former publication discloses a technology of a road freezing warning reflecting mirror which is rotatably attached to a housing and which rotates a reflecting surface provided on one surface by 90 degrees depending on temperature. However, at a given temperature, the reflecting mirror is maintained independently on the vertical and horizontal planes,
The existing retroreflective surface requires replacement of the reflective marking device that clearly indicates the existence of the roadside belt, which makes the device expensive.

In the latter publication, an aluminum disc whose surface is appropriately processed for reflection of light is rotatably supported, and the existence of left and right shoulders is known by this type of aluminum disc. However, it is limited to displaying the road width.

Therefore, the present invention can be used by attaching it to a reflective sign device that clearly indicates the existence of a roadside zone by an existing retroreflective surface, and can prevent the road surface from freezing that occurs in the winter in a driver or road without relying on an external power source. It is an object of the present invention to provide a low-priced freeze-display labeling device that can notify an administrator or the like.

[0011]

According to a first aspect of the present invention, there is provided a freeze-display marker device, wherein a retro-reflective surface clearly indicates the presence of a roadside belt, a housing attachable to the reflective marker body, and the housing. The retroreflective surface of the reflective sign body is rotatably attached to the retroreflective surface and can be changed to an exposed state or a non-exposed state. A front member having a reflecting surface, and a temperature responsive driving means made of a shape memory alloy for changing the retroreflective surface in the housing of the front member with temperature so as to bring the retroreflective surface into an exposed state or a non-exposed state. It is equipped with.

[0012]

According to the first aspect of the present invention, the housing is attached to the reflective sign body which clearly shows the existence of the roadside belt by the existing retroreflective surface. The shape memory alloy serving as the temperature responsive driving means is driven in response to a temperature change, and the front member is rotationally displaced by the substantially freezing temperature. The display by the retroreflective surface in the housing is switched.

[0013]

Embodiments of the present invention will be described below.

FIG. 1 is a perspective view of a frozen display marker device according to an embodiment of the present invention showing a retroreflective operation state, and FIG. 2 is a recurrence of a delineator of a freeze display marker device according to an embodiment of the present invention. FIG. 3 is a use perspective view showing a reflection operation state, and FIG. 3 is a use perspective view showing an attachment state of the freeze display marker device according to one embodiment of the present invention. FIG. 4 is an explanatory diagram showing a retroreflective operation state (a) and a transmission operation state (b) of the freeze display marker device according to the embodiment of the present invention. Furthermore, FIG.
FIG. 6 is a front explanatory view of all front members showing the retroreflective operation state of the freeze display marking device and the retroreflective operation state of the delineator according to one embodiment of the present invention.

In FIGS. 1 to 3, a well-known delineator 2 is attached to the top of the column 1 as a reflective sign that clearly indicates the existence of a roadside zone by a white or yellow retroreflective surface. Further, the housing 8 is attached to the column 1 by a known attaching means 4. The mounting means 4 of this embodiment inserts the top of the delineator 2 into the mounting portion 5a arranged on the upper back side of the housing 8, engages one end of the saddle 6 with the rail member 5, and The other end is screwed to the rail member 5 with bolts and nuts 7, and the support 1 is held between the rail member 5 and the saddle 6. The housing 8 is formed of an opaque synthetic resin material, a metal plate, a mold or the like in a box shape, and in this embodiment, is formed as an aluminum mold. A transparent plate 8a made of a transparent acrylic plate or a transparent glass plate on its front surface
Are arranged. The housing 8 of this embodiment is
It is composed of a transparent plate 8a and a transparent back cover 8b attached to the back side of a housing 8 described later.

The retroreflective surfaces 11A, 11B, 11C provided on one of the planes of the front members 10A, 10B, 10C disposed inside the housing 8 are
As shown in FIG. 1, it becomes an exposed surface that is transmitted through the transparent plate 8a.

In FIG. 4, the front members 10A, 10B and 10C disposed inside the housing 8 have support shafts 12A, 12B and 12C formed on one side thereof, and the support shafts 12A, 12B. , 12C are freely rotatable. The front members 10A, 10B in this embodiment,
10C includes three front members 10A, 10B, and 10C, one of which has a retroreflective surface 11A, a retroreflective surface 11B, and a retroreflective surface 11C.
A synthetic resin sheet containing a retroreflective material is adhered. Front member 10 disposed inside the housing 8
As shown in FIG. 4 (a), all of A, 10B and 10C are front members 10A and 10C when they become substantially vertical planes.
The retroreflective surfaces 11A, 11B and 11C of B and 10C are flush with each other to form an entire retroreflective surface. In addition, FIG.
As described above, when the whole is rotated by about 90 degrees and becomes a substantially horizontal plane, the retroreflective surfaces 11A, 11B, and 11C are all retroreflective surfaces that match the reflection direction with the incident direction of the light. It cannot be formed and the retroreflective surface 30 of the rear delineator 2 is exposed. Although the front members 10A, 10B, 10C of this embodiment are composed of three sheets, the number of sheets is not restricted when the present invention is carried out. However, when the number of sheets is about 2 to 5 as in the present embodiment, the contact resistance and the like are relatively small, and the front members 10A and 10A.
The mechanical strength of B and 10C can be strengthened.

That is, the whole front member 1 showing the retroreflective operation state of the freeze display marker device according to the embodiment of the present invention shown in FIG.
Since the retroreflective surfaces 11A, 11B, and 11C are flush with each other, as shown in the front views of 0A, 10B, and 10C, the entire surface thereof reflects the reflected light in the direction of the incident light.
Further, as shown in FIG. 4B, all the front surface members 10A, 10A
When all of B and 10C are rotated by about 90 degrees to become a substantially horizontal plane, all the front members showing the retroreflective operation state of the delineator 2 of the freeze display marker device according to the embodiment of the present invention shown in FIG. As shown in the front explanatory views of 10A, 10B, and 10C, incident light enters the retroreflective surfaces 11A, 11B, and 11C from the side surfaces, and the retroreflective surfaces 11A, 11B, and
The retroreflected light by 11C is negligibly small.

Here, the front member 10 will be further described in detail.

FIG. 7 is an exploded view of constituent parts of a freeze display marker device according to an embodiment of the present invention, and FIG. 8 is a front view (a) and a central longitudinal section of a freeze display marker device according to an embodiment of the present invention. It is a side view (b).

In the figure, the housing 8 of this embodiment is
It is formed as a mold of aluminum, and the front surface thereof has a transparent plate 8a made of a transparent acrylic plate, a transparent glass plate, or the like, which is adhered all around by using an adhesive. The housing 8 is provided with standing pieces 13 and 14 standing upright from the front side in the rear direction. Further, the upright piece 14 has support shafts 14A, 14B, 14C which are inserted through fitting shafts (not shown) of the front members 10A, 10B, 10C.
(Not shown) is screwed in and joined so as to restrain its rotation. The standing piece 13 has front members 10A, 10
A notch portion 13B (13A, 13C is not shown) in which the support shafts 12A, 12B, 12C of the B, 10C are supported is inserted, and a front surface member 10A, 10B, 10C support shaft 12A, 1
Only rotation around 2B and 12C is allowed. The front surface members 10A, 10B, 10C are provided with connection holes 15A (15B, 15C are not shown) at positions distant from a fitting shaft (not shown), and these are provided with connection pins 16A, 1 respectively.
6B and 16C, it is rotatably connected to the connecting member 17.

On the other hand, the inner box 20 which can be freely inserted into the housing 8
A connecting rod 21 that is vertically movable by means of a guide groove 20A is disposed on the inside thereof. Hook portions 21d and 21e are formed on both sides of the connecting rod 21, and a compression spring 22 that biases the connecting rod 21 to raise the connecting rod 21 is disposed on one hook portion 21e. The other hook portion 21d is provided with a compression spring 23 made of a shape memory alloy that urges the connecting rod 21 to descend. When the temperature is below the freezing point, the elastic force of the compression spring 23 made of a shape memory alloy to lower the connecting rod 21 is
A compression spring 2 that urges the connecting rod 21 to rise.
It becomes weaker than the elastic force of 2, and raises the connecting rod 21.
However, normally, when the temperature exceeds substantially the freezing point, the elastic force of the compression spring 23 made of a shape memory alloy to lower the connecting rod 21 abruptly is larger than the elastic force of the compression spring 22 which urges the connecting rod 21 to rise. Become stronger. Therefore, the connecting rod 21 rises below the normal substantially freezing point temperature, and the connecting rod 21 descends at a high temperature exceeding the substantially freezing point temperature. The compression spring 23 made of this shape memory alloy has a shape memorized so that each turn portion has a rough compression density at a temperature of 1 to 2 ° C. or less. The part makes the compression density dense.

The inner box 20, the connecting rod 21, the compression spring 22, and the compression spring 23 made of a shape memory alloy.
Is regulated by the regulation member 24 fixed to the inner box 20 with screws.
The connecting rod 21, the compression spring 22, and the compression spring 23 made of a shape memory alloy are prevented from coming off. Further, the connecting rod 21 has a small protrusion 21a and a small protrusion 21.
b is provided so as to project, and the recessed groove 2 of each of the regulating members 24 is formed.
4a or the recessed groove 24b is fitted, and the vertical movement of the connecting rod 21 is restricted. A large protrusion 21c is provided on the connecting rod 21 and is inserted into the through groove 25 of the regulating member 24. The vertical movement of the connecting rod 21 is the vertical movement of the large protrusion 21c.

An end portion of the large protrusion 21c for transmitting the vertical movement of the connecting rod 21 is connected to the connecting member 17,
The vertical movement of the connecting rod 21 is transmitted to the connecting member 17.

Further, the transparent back cover 8b attached to the back side of the housing 8 is integrally formed with a housing hole 8c made of a transparent synthetic resin material for housing the well-known delineator 2. The inside is made airtight by adhesion with an adhesive. That is, it is sealed in a low humidity state so that the inside thereof does not condense due to changes in the outside temperature. Further, the transparent back cover 8b has a mounting portion 5a made of a metal fitting on an upper portion thereof, and a rail member 5 on a lower portion thereof screwed into the housing 8 with screws. As a result, the transparent back cover 8b is
It is firmly fixed with an adhesive and screws.

The assembly of the freeze display marker device of this embodiment is carried out as follows. First, housing 8
For the standing pieces 13 and 14 of the retroreflective surface 11
Front members 10A, 10B provided with A, 11B, 11C,
10C and a connecting member 17 rotatably connected by connecting pins 16A, 16B, 16C are attached, and the inner box 20 is connected to the housing 8 by a connecting rod 21, a compression spring 22 and a compression spring 23 made of a shape memory alloy.
It is inserted into the inner box 20 together with the restriction member 24 which is screwed. After that, the transparent back cover 8b is adhered to the housing 8 with an adhesive, and the mounting portion 5a and the rail member 5 are screwed. As a result, the transparent back cover 8b is attached to the housing 8.
Install in a sealed state.

Then, the top of the delineator 2 is inserted into the mounting portion 5a attached to the upper surface of the transparent back cover 8b of the housing 8, the delineator 2 is housed in the housing hole 8c of the transparent back cover 8b, and One end of the saddle 6 is engaged with the rail member 5, and the other end of the saddle 6 is connected to the rail member 5.
Bolts and nuts 7 to the rail member 5 and saddle 6
The strut 1 is held between them, and the delineator 2 and the housing 8 are firmly integrated.

The marking device for freeze display of the present embodiment having the above-described structure operates as follows. In the inner box 20 arranged in the housing 8, the outside air temperature becomes the temperature of the compression spring 23 made of a shape memory alloy due to heat conduction, radiant heat and the like of the housing 8 and the inner box 20. Compression spring 2
3, that is, when the outside air temperature exceeds the substantially freezing point temperature and is higher than the substantially freezing point temperature, the compression spring made of a shape memory alloy is more elastic than the elastic force of the compression spring 22 for urging the connecting rod 21 to rise. The elastic force of 23 is strong, and the connecting rod 21 is lowered by the elastic force of the compression spring 22 (within the lowering limit regulated by the inside of the inner box 20). As a result, all front members 10A, 10B,
The retroreflective surfaces 11A, 11B, and 11C of 10C rotate substantially 90 degrees from the position of FIG. 5 and become substantially horizontal planes with respect to the substantially horizontal plane of the road. At this time, even if horizontal light from a headlight of an automobile or the like arrives, the retroreflective surfaces 11A, 11B, and 11C do not directly receive the light of the headlight of the automobile or the like, so that reflected light is emitted in the direction of the light source of the headlight. Do not reflect. However, the light of the headlight is projected to the retroreflective surface 30 on the surface of the delineator 2 attached to the back side of the housing 8, and the retroreflective surface 30 produces reflected light.
This allows the driver to confirm the presence of the retroreflective surface 30. As a result, the driver can drive while confirming the presence of the road edge by the presence of the retroreflective surface 30 of the delineator 2. At this time, since the shaded portions that are shielded by all the front surface members 10A, 10B, and 10C are generated, the retroreflected light that is visually recognized by the retroreflective surface 30 of the delineator 2 may be a reflective surface having a substantially horizontal line.

Further, when the outside air temperature drops below about the freezing point temperature, in this embodiment, the density of each turn of the compression spring 23 made of a shape memory alloy whose shape is memorized at a temperature of 1 to 2 ° C. or less should be roughened. Therefore, the elastic force in the compression direction decreases at a temperature of 1 to 2 ° C. or less. Therefore, the elastic force of the compression spring 23 made of a shape memory alloy in the compression direction becomes weaker, and the elastic force of the compression spring 22 in the compression direction becomes stronger, so that the compression spring 22 raises the connecting rod 21. When the connecting rod 21 is lifted by the elastic force of the compression spring 22 (within the rising limit regulated by the inside of the inner box 20), all the front members 10A,
10B, 10C retroreflective surfaces 11A, 11B, 11C
Is flush with the substantially horizontal surface of the road. Therefore, the retroreflective surfaces 11A, 11B, 11C
When receiving light from a headlight of an automobile or the like, the reflected light is reflected in the direction of the light source of the headlight so that the driver can confirm the presence of the retroreflective surfaces 11A, 11B, 11C. As a result, the driver can recognize the presence of the road edge and the freezing of the road surface by the presence of the retroreflective surfaces 11A, 11B, 11C.

In this embodiment, when the temperature is lower than the freezing temperature of the road surface, the retroreflective surfaces 11A, 11B, 11C of all the front members 10A, 10B, 10C are surfaces substantially vertical to the substantially horizontal plane of the road. , Retroreflective surfaces 11A, 11B,
When the road surface exceeds the freezing temperature and exceeds the hysteresis temperature, the retroreflection of 11C is recognized by the driver, and when the road surface exceeds the hysteresis temperature, the retroreflective surfaces 11A of all front members 10A, 10B, 10C,
11B and 11C rotate about 90 degrees to become a substantially horizontal plane with respect to a substantially horizontal plane of the road, and make the driver recognize the retroreflection by the retroreflection surface 30 of the delineator 2 on the back side of the housing 8. In the case of implementation, if the compression spring 23 and the compression spring 22 made of a shape memory alloy are installed in reverse, the retroreflective surfaces 11A, 11 are formed.
The retroreflective display of B and 11C and the retroreflective display by the retroreflective surface 30 of the delineator 2 can be reversed.

Further, this type of retroreflective surfaces 11A, 11
Using the difference between the retroreflective display of B and 11C and the retroreflective display of the retroreflective surface 30 of the delineator 2, further, for example,
At the time of retroreflective display of the retroreflective surfaces 11A, 11B, 11C, "freezing", "connection", "note",
Express the characters of "meaning" or "run", "line",
It can also be configured so that each character of "note" and "meaning" is displayed. That is, when the present invention is carried out, the retroreflective display of the retroreflective surfaces 11A, 11B, 11C and the retroreflective surface 30 of the delineator 2 is not limited to the coloring of the retroreflective surface, and is not limited to the coloring of the retroreflective surface. Characters may be formed, or the shape of the retroreflective surface may be an external shape that means freezing.

By the way, in the marking device for frozen display according to the above-mentioned embodiment, the reflective sign body such as the delineator 2 or the like, which clearly indicates the existence of the roadside zone by the retroreflective surface 30 as the retroreflective surface, and the reflective sign body such as the delineator 2 or the like. And a housing 8 that can be attached to the housing 8 so that the retroreflective surface 30 as a retroreflective surface of the reflective sign body is exposed or not exposed, Front member 10A having a retroreflective surface in the housing, which is formed of retroreflective surfaces 11A, 11B, and 11C that are exposed when the retroreflective surface 30 of FIG.
10B, 10C and the front members 10A, 10B, 10
An embodiment may be provided with a temperature-responsive driving means including a compression spring 23 made of a shape memory alloy that changes depending on the temperature at which the retroreflective surface is driven to the exposed state or the non-exposed state by C.

In this embodiment, since the front members 10A, 10B, 10C are rotationally displaced about the freezing temperature, the retroreflective surfaces 11A, 11B, 11C of the front members 10A, 10B, 10C are provided. It can be divided into a case where the driver recognizes it as retroreflected light and a case where it recognizes it as retroreflected light by the retroreflective surface 30 of the delineator 2. Therefore, the driver can determine whether or not the road surface is frozen by the difference between the retroreflective surfaces 11A, 11B, 11C and the retroreflective surface 30. In addition,
Housing 8 attachable to the column 1 in the above embodiment
Although the front members 10A, 10B, and 10C are sealed, the present invention is not necessarily premised on use in the sealed condition, and the front members 10A, 10A, There is no need to put 10B and 10C in a sealed state. However, the front members 10A, 10B, 10C
By using the housing 8 that seals
The reliability with respect to dust can be increased and the size can be reduced accordingly.

Further, the freeze display can be performed only by attaching it to the reflection marker body such as the existing delineator 2. Of course, it can be removed during the summer.

The retroreflective surface 1 is rotatably attached to the housing 8 of the above embodiment and is provided on one plane.
Front member 10A, 10 having 1A, 11B, 11C
Although B and 10C have a mode of rotating by 90 degrees, the rotation of the front surface members 10A, 10B and 10C is not limited to the rotation of 90 degrees when the present invention is carried out. Other retroreflections provided on the back surfaces of the front members 10A, 10B, and 10C can be exposed by rotating the front members by 180 degrees. In particular, when the difference between the retroreflective display of the retroreflective surfaces 11A, 11B and 11C of this kind and the retroreflective display of the opposite surface is used, for example, when the retroreflective display of the retroreflective surfaces 11A, 11B and 11C is performed, Alternatively, it is possible to display a character or a figure having different retroreflective surfaces depending on the color of the character and the background. That is, when implementing the present invention, the retroreflective display of the retroreflective surfaces 11A, 11B, 11C and the retroreflective surface 30 is not limited to the coloring of the retroreflective surface, and characters are formed on the surface. Alternatively, the shape of the retroreflective surface may be an external shape that means freezing.

Further, the temperature-responsive drive means in the freeze display marker device of the above-described embodiment has been described on the premise that it is driven by deformation due to temperature change due to the shape memory alloy composed of the compression spring 23, but the present invention is embodied. In this case, the shape of the compression spring is not limited,
It may be in the shape of a spiral or a leaf spring. Of course, the shape memory alloy may be used as the heat responsive means such as shape memory plastic or bimetal. However, if the shape memory alloy is used as in the above embodiment, the displayed contents can be rapidly switched in the vicinity of the freezing temperature of the road.

The front members 10A, 10B, 10C in the freeze display marking device of the above embodiment are rotatable by axially supporting a plurality of plate members in the length direction and horizontally. Is. Therefore, each front member 10A, 1
Since the weights of 0B and 10C are divided into two parts, it is possible to reduce wear at a horizontally supported portion, resulting in a long life. In particular, each front member 10A, 10B,
10C is suitable for large ones.

The front members 10A, 10B, 10C in the freeze display marker device of the above-described embodiment are rotatably supported by axially supporting a plurality of plate members in the longitudinal direction thereof. Is. Therefore, each front member 10A,
The weights of 10B and 10C are concentrated on one point which is vertically supported and the contact resistance can be reduced. Therefore, the front members 10A, 10B and 10C are particularly suitable for small ones.

Further, the front members 10A and 10 of this embodiment are
The numbers and shapes of B and 10C are not limited to the numbers and shapes of the embodiment when implementing the present invention.

By the way, the compression spring 23 made of a shape memory alloy as the temperature responsive driving means of the above embodiment is
Although a shape memory alloy that changes with temperature changes is used, in the case of implementing the present invention, a thermal responsive means that can expect a physical variation due to temperature changes such as bimetal can be used. Especially when suddenly changing the freezing temperature of the road surface as a boundary, shape memory alloy, bimetal,
It is preferable to use a heat responsive means having a snap function such as trimetal.

Further, although the temperature-responsive driving means in each of the above-mentioned embodiments does not detect a temperature of 0 ° C. or lower, the temperature-responsive driving means of 0.
The marking device for freeze display, which is installed on the top of 8-1m,
A good freezing temperature detection effect was obtained by setting the temperature slightly higher than the freezing temperature of the surface due to the relationship between the temperature detection point and the temperature difference of the surface. However, traffic volume, mountainous areas, etc.
0 ° C depending on the installation environment such as the type of road surface and the time lag
Can be set to 0 ° C. or below 0 ° C. Further, the shape memory alloy having a hysteresis temperature of about 3 to 4 ° C., that is, a material that recovers at 4 to 5 ° C. was used.
Once the road surface freezes, even if the outside air temperature rises, the road surface temperature does not immediately rise and there is a time lag, so this is corrected with this hysteresis temperature. For example, it is desirable to use the hysteresis temperature in correspondence with the temperature rise between the road surface temperature that is frozen at night and the freeze is released and the outside air temperature in the morning. And housing 8
The temperature responsive driving means may be arranged at any position, and preferably, the lower temperature, the lateral position, the back position, and the upper position can be detected as locations where the outside air temperature can be detected with a small time lag.

The expression form that changes near the freezing temperature of the road surface may be either characters or figures.

Further, in the case of implementing the present invention, the retroreflective surface can be formed as a small sphere, a prism surface, or the like, and coloring for reflected light is performed by coloring the reflective surface or using a transparent body as a colored transparent member. it can. Further, the retroreflection of the above-mentioned embodiment, although assuming that the incident angle and the reflection angle are parallel to each other like a transparent sphere, when implementing the present invention does not mean retroreflection in a narrow sense, It is self-evident that it can be replaced with a mirror surface whose incident angle and reflection angle are parallel to each other, and since there is no need for the incident angle and reflection angle to be exactly parallel, basically, most of the incident light is Is reflected as reflected light.

In the above embodiment, the case of the housing 8 which can be attached to the column 1 has been described. However, when the present invention is carried out, there is no limitation that the delineator 2 must be attached to the column 1. It may be attached directly or indirectly to the delineator 2 itself or other attachments or balustrades on the bridge.

Further, although the above embodiment has been described on the premise that the inside of the housing 8 is sealed, the present invention is not limited to sealing the inside of the housing 8. Absent. However, when the inside of the housing 8 is sealed, the life thereof can be extended.

[0046]

As described above, the marking device for freeze display according to the present invention has a housing which can be attached to a reflective sign body which indicates the existence of a roadside band by a retroreflective surface, and is rotatable with respect to the housing. Attached to, the retroreflective surface of the reflective sign body is in an exposed state or a non-exposed state,
A front member having a retroreflective surface in the housing that is exposed when the retroreflective surface is in a non-exposed state, and the housing of the front member to bring the retroreflective surface into an exposed or non-exposed state. And a temperature responsive driving means made of a shape memory alloy for changing the retroreflective surface in the inside thereof according to temperature, and the temperature responsive driving means rotationally displaces the front member by substantially freezing temperature. The display can be switched by the retroreflective surface provided on the member in the housing and the retroreflective surface provided on the reflective sign body. Therefore, it is possible to notify the driver, the road administrator, or the like of the freezing of the road surface that occurs in winter without relying on an external power source. In addition, the frozen display can be performed only by attaching it to the reflective sign body made of an existing delineator or the like. Further, the device becomes inexpensive by utilizing the retroreflective surface of the existing reflective sign body.

[Brief description of drawings]

FIG. 1 is a perspective view showing a frozen display marker device according to an embodiment of the present invention in a retroreflective operation state.

FIG. 2 is a use perspective view showing a retroreflective operation state of a delineator of a freeze display marker device according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a mounted state of the freezing display marker device according to one embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a retroreflective operation state (a) and a transmission operation state (b) of the frozen display marker device according to one embodiment of the present invention.

FIG. 5 is a front explanatory view of all the front members showing the retroreflective operation state of the freeze display marker device according to the embodiment of the present invention.

FIG. 6 is a front explanatory view of all front members showing the retroreflective operation state of the delineator of the freeze display marker device according to the embodiment of the present invention.

FIG. 7 is an exploded view of components of the freeze display sign device according to one embodiment of the present invention.

FIG. 8 is a front view (a) and a central longitudinal cross-sectional view (b) of a freeze display marker device according to an embodiment of the present invention.

[Explanation of symbols]

 8 Housing 8b Back Lid 30 Retroreflective Surface 23 Compression Spring 21 Composed of Shape Memory Alloy 21 Connecting Rod 22 Compression Spring 10A, 10B, 10C Front Member 11A, 11B, 11C Retroreflective Surface

Claims (1)

(57) [Claims] 1. A reflective sign main body that clearly indicates the presence of a roadside belt by a retroreflective surface, a housing attachable to the reflective sign main body, and a rotatably attached to the housing. The reflective surface can be changed to the exposed or non-exposed state, and it appears when the retroreflective surface is in the unexposed state.
A front member having a retroreflective surface in the housing, and the retroreflective surface in an exposed or non-exposed state,
The retroreflective surface in the housing of the front member is exposed to temperature.
And a temperature-responsive driving means made of a shape memory alloy that changes with time .