JPH06173224A - Herring bone for displaying road boundary in snowfall area - Google Patents

Abstract

PURPOSE:To simplify heat source and to improve the safety of road traffic by providing the back of a signpost plate with heat reserving agent, and emitting heat reserved in daytime during low temperature such as at night and in the early morning to prevent the signpost plate from freezing. CONSTITUTION:Thermal insulating agent 4A, a heat reserving agent container 3, thermal insulating material 4 and a back plate 5 are laminatedly attached in order to the back of a signpost plate 1. Heat reserving agent 2 made through the gelation of ethylene glycol is received in a vessel 3. Next, in order to install a herring bone 10 on a boundary between a driveway and a sidewalk, the signpost plate 1 is adjusted in its position and attached to the horizontal section 7 of a pillar upper part through clamping metal fittings 9. Heat is collected from the signpost plate 1 during the daytime when the temperature of the air is high and transmitted to the heat reserving agent 2 for storing. When the temperature of the air lowers from night to the early morning, heat is emitted from the heat reserving agent 2 to the signpost plate 1. Thus snow accretion, condensation and freezing on the signpost plate 1 can be prevented, and structure and the execution of work can be simplified without using an electric heater or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrow blade having a function of preventing snow accumulation and freezing of the arrow blade which are likely to occur in cold weather.

[0002]

2. Description of the Related Art The arrow blade is a safety device for guiding the road that distinguishes the boundary between the roadway and the outside of the roadway. However, snow adheres, cold weather or fog occurs, and this adheres to the signboard. Since it often freezes and loses its function and poses a road traffic risk, there is a strong demand for its solution.

[0003]

The main cause of the freezing of the arrow blades is that the temperature of the sign surface drops below the ambient temperature and drops below the dew point temperature, causing water droplets or ice particles to adhere to the sign surface. The temperature drops to freeze. In order to prevent snow from adhering and freezing, the temperature of the sign surface should not be lower than the dew point temperature.

The inventors of the present invention conducted various experiments, learned that it was necessary to relatively warm the marking surface by using a heat storage agent, and arrived at an efficient method for the invention. I arrived.

[0005]

One of the objects of the present invention is to:
An arrow blade marking plate, a gel heat storage agent installed on the back surface thereof so as to be able to conduct heat, and a heat insulating material placed in close contact with the heat storage agent,
Another object of the present invention is to provide an arrow blade for indicating a road boundary in a snowy area, which comprises a back plate and a heat storage agent, a heat insulating material, and a back plate which are integrally provided on the back surface of the sign plate.

Another object of the present invention is to provide a marking plate for an arrow blade, a gel-like heat storage agent container having a small amount of moisture permeation loss installed on the back surface thereof so that heat can be conducted, and a heat insulating material closely attached to the container. Another object of the present invention is to provide an arrow blade for indicating a road boundary in a snowy area, which is characterized by comprising an integrated backing plate.

It is preferable to provide a heat buffer between the back surface of the arrow blade marking plate of the present invention and the gel heat storage agent.

Another object of the present invention is to store a gel heat storage agent in a container, prevent convection of the heat storage agent when the ambient temperature rises and falls, and improve heat storage efficiency. . Another object of the present invention is to provide a road boundary display arrow blade in a snowy area in which the heat storage agent is uniformly arranged on the entire surface of the sign board to prevent distortion of the sign board.

[0009]

EXAMPLES Examples of the present invention will be described in more detail. FIG. 1 is an installation diagram in which the arrow blade of the present invention is attached to a pillar. FIG. 2 is a sectional view of the arrow blade of the present invention. In FIG. 2, 1 is a metal plate having an appropriate flat marking surface and having an appropriate thickness, and 5 is a back plate integrally joined with a space for containing an appropriate content.

In the present invention, the heat insulating material 4A is provided in close contact with the inside of the sign board 1, and the container 3 for containing the heat storage agent is provided on the back side thereof.
The container 3 is filled with the heat storage agent 2 and the heat insulating agent 4 is provided between the back surface of the heat storage agent-containing container 3 and the back plate 5 to cause snow, dew or ice on the sign surface 1A of the sign plate 1. It is configured to prevent fogging due to (frost). Reference numeral 6 is a support fitting for connecting and supporting the arrow blade of the present invention to the pillar 7. This support fitting is vertically aligned and joined by a positioning clasp 8.

In order to install the arrow blade 10 at the boundary between the road 11 and the sidewalk 12 or the outside of the road, it is connected to the support metal 6 at the horizontal portion of the upper portion of the pillar 7 with the fastener 9 and the positioning clasp 8. To do. It is preferable that the heat storage agent has a large specific heat and a large amount of heat storage in a wide temperature range from about -40 ° C to 45 ° C, does not freeze, is non-toxic, and has little deterioration in the long term. It is also necessary to fully consider the compatibility between the heat storage agent and the container.

In the present invention, considering the above conditions, for example, when an arrow blade having a length of 1.2 m and a width of 0.35 m is used, a liquid mixture of water such as ethylene glycol, diethylene glycol, propylene glycol and water is gelled. Things are used. The gelation of the heat storage agent may be performed by any method. For example, a commercially available superabsorbent resin is used in an appropriate amount to form a gel, or 5 to 10% by weight of commercially available polyvinyl alcohol is added and dissolved at a high temperature, followed by freezing, or other hydroxyethyl ester. There is a method in which a bifunctional monomer such as ethylene glycol or dimethacrylate is added to a water-soluble monomer such as methacrylate to carry out a polymerization reaction. However, gelation may be performed by any method. That is, if it is a gel,
Since there is no convection, heat storage energy can be effectively used for a long time in the heat storage agent, there is no fear of liquid leakage, and it shows a favorable tendency against vibration during product transportation.

A woven cloth, a net, a sponge, a fiber, and a non-woven fabric are impregnated with the heat storage agent 2 and stored in the container 3. It is desirable that the container 3 containing the heat storage agent is in close contact with the heat insulating material 4A on the back of the signboard 1. Further, it is desirable that the volume of the heat storage agent per unit area is substantially the same over the entire surface of the sign board 1. The reason for impregnating into these is that the heat storage agent is soft and does not concentrate in the lower part due to gravity, so it is necessary to impregnate the nonwoven fabric. Further, since the operating temperature is between -40 ° C and + 45 ° C as described above, it is necessary that the heat storage agent 2 does not dissipate outside due to vaporization permeation or the like. Considering these conditions, in the present invention, a three-layer film in which the front and back surfaces of the aluminum foil are laminated with a polyethylene film is used as a rectangular container of 13 cm × 105 cm, but is not limited to this. do not do.

The container 3 containing the heat storage agent is provided with an inlet 11. A heat insulating material 4 is provided between the signboard and the container 3 containing the heat storage agent.
Insert A. As the heat insulating material 4A, for example, 2.0 t foamed polyethylene is installed. The heat insulating material 4 placed between the container 3 for containing the heat storage agent and the back plate 5 is housed in a polyethylene film bag in order to waterproof 40 t polyester-based polyurethane foam. During the daytime when the outside air temperature is high, more heat is collected from the signboard 1 and the heat is stored in the heat storage agent 2. When the outside air temperature decreases from night to early morning, the sign board is heated by radiating heat only from the sign board 1 side from the heat storage agent,
The temperature is kept higher than the ambient temperature of the outside air.

When the signboard 1 collects heat and transfers heat to the heat storage agent 2 when the outside air temperature rises from morning, the heat storage agent 4A does not immediately rise in temperature because the heat storage agent has a large heat capacity. The temperature gradually rises several hours later than the temperature rise. For this reason, the sign surface may become cloudy when the outside temperature rises in the morning.
The heat insulating material 4A is for eliminating this, so that when the outside air temperature rises, the temperature rise of the signboard 1 is not delayed, and when the outside air temperature falls, abrupt heat dissipation is buffered.

The heat insulating material 4 placed between the back plate 5 and the container 3 containing the heat storage agent prevents the heat from radiating from the back plate 5 side. In addition to this, the container 3 containing the heat storage agent is provided with a heat insulating material 4A.
It also has the role of bringing the sign board 1 into close contact with the sign board 1 by using elasticity.

Next, FIG. 3 shows a comparison test situation of the arrow blade (A) of the present invention, an arrow blade only of an aluminum plate without a fogging preventing function (hereinafter referred to as incoming product (B)) and ambient temperature.
Shown in.

FIG. 3 is a graph in which the temperatures of the marking surface and its surrounding area are recorded for 24 hours in the above both cases, and the temperature of the marking surface of the present invention is higher from night time to early morning than the conventional product (B). Shows the temperature.

This is because the sign surface is heated by the heat storage energy released from the heat storage agent after the ambient temperature starts to drop from the evening. From the above comparative test results,
The sign of the present invention shows a very effective antifog effect.

[0020]

INDUSTRIAL APPLICABILITY The present invention relates to an improvement of an arrow blade, which prevents the dew condensation and frost (frost) on the marking surface which may occur in the cold or from night to morning, thereby always fulfilling the role of the arrow blade. , There is a remarkable effect that can improve the safety of road traffic.

In the conventional electric heater type fogging prevention, there were problems such as restriction of construction, life of the heater and electricity bill. The present invention is an industrially useful invention that solves this problem by a simple mechanism in which a heat insulating material and a container containing a heat storage agent are put on the back surface of the sign board and the heat insulating material is put on the back surface.

[Brief description of drawings]

FIG. 1 is an embodiment diagram in which the arrow blade of the present invention is attached to a column.

FIG. 2 is a graph showing the behavior of temperature change measured by comparing the performances of the arrow blade (A) of the present invention and the conventional product (B).

FIG. 3 is a sectional view of an arrow blade.

[Explanation of symbols]

 1 Marking Plate 1A Marking Surface 2 Heat Storage Agent 3 Container for Retaining Heat Storage Agent 4 Heat Insulation Material 4A Heat Insulation Plate 5 Back Plate 6 Supporting Metal 7 Pillar 8 Positioning Bracket 9 Tightening Metal 10 Arrow Blade 11 Roadway 12 Sidewalk

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuyuki Nagasaki 2490-5 Higashikatagami, Bizen City, Okayama Prefecture (72) Inventor Yasuo Nanjo 400-8 Fukui, Kurashiki City, Okayama Prefecture Katsumi Tamura 590 Takao, Tsuyama City, Okayama Prefecture -1

Claims (5)

[Claims] 1. A back surface of a sign board, which comprises a sign board of arrow blades, a gel heat storage agent installed on the back surface thereof so as to be able to conduct heat, a heat insulating material arranged in close contact with the heat storage agent, and a back plate. An arrow blade for indicating a road boundary in a snowy area, characterized in that a heat storage agent, a heat insulating material, and a back plate are integrally provided in the. 2. An arrow blade marking plate, and a gel-like heat storage agent container having a small amount of moisture permeation loss installed on the back surface thereof so as to be able to conduct heat.
An arrow blade for displaying road boundaries in a snowy area, characterized by comprising a heat insulating material closely attached to this and a back plate. 3. The arrow blade for displaying a road boundary in a snowy area according to claim 1, wherein a heat buffering material is provided between the back surface of the sign board and the gel heat storage agent. 4. The arrow blade for displaying a road boundary in a snowy area according to claim 2, wherein a heat buffering material is provided between the back surface of the signboard and the gel heat storage agent. 5. An arrow blade for indicating a road boundary in a snowy area, which is obtained by impregnating a woven fabric, a non-woven fabric, a sponge, a knit, or the like with the gel heat storage agent according to any one of claims 1, 2, 3, and 4.