JP2002212925A - Movable road marking and manufacturing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent repulsive force from being enhanced due to an increase in internal pressure during the settlement of a marking body by the passage of a snow removing blade and the like. SOLUTION: During the passage of the snow removing blade 28, an elastic supporting member 3, elastically supporting the marking body 2 in such a manner as to be movable upward and downward, is deformed due to deflection, and a helical compression spring 25 undergoes compressive deformation for the purpose of the settlement of the marking body 2. Conversely, the elimination of application of external force brings about a return to a former state. In an unloaded state, a sealed internal space centered on a space part 4 is put into a state of negative pressure in advance so as to be capable of preventing the repulsive force from being enhanced due to the increase of the internal pressure even if the volume of the internal space is reduced with the settlement of the marking body 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-luminous type or reflective type road sign (road sign) which is buried at an appropriate interval or independently at a center line of a road, a lane change prohibition line, a road shoulder or a portion corresponding to the center of an intersection. In order to avoid interference with the snow removal blade, especially in the case of snow removal work on the road by a snow remover in a snowfall area, a structure that can be moved up and down positively Road sign structure.

[0002]

2. Description of the Related Art A typical example of this type of movable road marking is described in Japanese Patent Application Laid-Open No. Hei 9-158135. This conventional movable road sign is designed to sink to a road surface level when a load is applied by a vehicle or the like and to move up a predetermined amount autonomously when the load is removed. It is shown in FIG.

As is apparent from FIG. 1, a cylindrical sign body 101 made of aluminum alloy or the like is a box-shaped base 102.
The shaft portion 103 is integrally formed at the center of the box-shaped base 10.
A reflector 104 having an appropriate width is provided on an upper portion protruding from the second base member 2.
05 is supported by a plurality of steel balls 106 so as to be vertically movable. The sign body 101 is constantly urged upward by a compression coil spring 107 interposed between the sign body 101 and the inner bottom surface of the box-shaped base 102,
The space between the marker main body 101 and the box-shaped base 102 is sealed by a packing 109 which is fixed by pressing with a pressing ring 108.

The interior space of the box-shaped base 102 to be sealed by the packing 109 is divided into two spaces R1 and R2 by a rubber-based elastic body 110, and one space R1 has a silicone-based space. Alternatively, an oil-based paste semi-solidifying agent 111 is filled.

[0005] Therefore, when any external force is applied to the top of the sign main body 101 due to, for example, getting on the vehicle, the sign shown in FIG.
As shown in FIG. 1, the sign body 101 sinks until the top reaches the road surface level R while compressing and deforming the compression coil spring 107. At the same time, the semi-solidifying agent in the space R1 receives a compressive force in accordance with the downward movement of the marker main body 101, and as a result, the rubber-based elastic body 110 is greatly expanded and deformed toward the space R2. When the external force is removed, the marker main body 101 moves up to the original level again by the self-restoring force of the compression coil spring 107 and the rubber-based elastic body 110. This absorbs the impact when the sign main body 101 repeatedly moves up and down, thereby contributing to the reduction of noise and vibration.

[0006]

In such a conventional structure, a part of the body of the sign body 101 is partially covered with the reflector 104.
Since the marker body 101 protrudes above the road surface R as an attachment portion of the vehicle, the sign body 101 moves down smoothly when the vehicle gets on or the like, but, for example, the snow removing blade of the snow blower advances from the lateral direction along the road surface. In such a case, the snow removing blade interferes with the marker main body 101 or the reflector 104, resulting in the damage thereof, which is not preferable.

The sign body 101 is elastically supported so as to be able to move up and down via a compression coil spring 107, and furthermore, care is taken to make the up and down movement smooth by the interposition of a plurality of steel balls 106. However, since the space R2 surrounded by the box-shaped base 102 and the rubber-based elastic body 110 is a substantially closed space, when the marker body 101 is moved downward, the rubber is added while the semi-solidifying agent 111 flows. Even if the elastic body 110 tries to swell toward the space R2, there is no place for air in the space R2 to escape.
The spring force of the fluid spring is added to the spring force of 07. As a result, the spring constant of the entire spring system supporting the sign body 101 becomes unnecessarily large, so that the repulsive force of the sign body 101 itself cannot be smoothly moved up and down. In addition to the possibility of causing damage to 101, the semi-solidifying agent 111 inside may leak from the sliding portion between the sign body 101 and the packing 109 in some cases, requiring extra man-hours for maintenance and inspection. I do.

On the other hand, Japanese Patent Application Laid-Open No. 2000-6 / 2000 considers the above-described interference avoidance between the snow removal blade and the sign body.
As described in Japanese Patent No. 4231, there has been proposed an apparatus in which the vertical movement of the sign body depends only on the elastic force of a rubber-based elastic support member interposed between the sign body and the housing. Even in the case of the type, the space secured in the housing to allow the sign body to move up and down is still a closed space. Therefore, even if the sign body tries to descend, the descending operation of the sign body is particularly slow due to the increase of the internal pressure, and the vibration caused by the passing of the vehicle or the snow removing blade and the sign body interfere with each other as described above. There is a possibility that there is still room for improvement.

SUMMARY OF THE INVENTION The present invention has been made in view of the above background, and in particular, to prevent the lowering operation of the sign main body from being hindered by an increase in the internal pressure of the internal space, and thereby to prevent damage due to interference with a snow removal blade or the like. It is an object of the present invention to provide a structure for preventing the occurrence of the problem and improving the operation stability.

[0010]

According to the first aspect of the present invention, there is provided a substantially cylindrical housing having a bottom and an open top, a sign body housed in the housing and having a light emitting function or a reflecting function, and A rubber-based elastic support member interposed between the housing and the sign main body, connecting the housing and the sign main body, and elastically supporting the sign main body so as to be vertically movable with respect to the housing; It is premised that the sign is a movable road sign having a sealed space formed between the sign body and the sign body to allow the sign body to descend with respect to the housing.

In addition, the space is set to have a negative pressure when the sign body is raised with respect to the housing, and the sign body is provided between the housing and the sign body. A return spring biasing upward is interposed.

The marker body may be of either a light-emitting type or a reflection type. The rubber-based elastic support member is connected to the housing and the marker body by, for example, vulcanization.

Further, the return spring positively applies an upward restoring force to the marker body together with the elastic support member. However, it is considered that the marker body may be inclined and lowered with respect to the housing. Then, as in the second aspect of the present invention, the return spring is a compression coil spring and is interposed between the bottom center portion of the housing and the bottom center portion of the sign body. As in the invention described above, it is desirable that the return spring is made of a cushioning rubber and is interposed between the center of the bottom on the housing side and the center of the bottom of the sign body.

In this case, if the cushioning rubber is formed integrally with the rubber-based elastic support member or the sign body that connects the housing and the sign body, the component is formed as described above. This is more preferable in terms of reduction in points.

Therefore, according to the first to fourth aspects of the present invention, in a no-load state in which no external force is applied to the sign body from above, the sign body rises with respect to the housing with the elastic restoring force of the elastic support member and the return spring. And self-hold that state.

On the other hand, when an external force is applied to the sign body from above due to the climbing of the vehicle or the passage of the snow removing blade, the sign body descends as if it were buried in the housing while elastically deforming the elastic support member and the return spring. (Settle). Although the volume of the space in the housing is reduced with the descending operation of the sign body, the internal pressure rise due to the reduction of the volume of the space is extremely small because the space has been negatively charged in advance. . Therefore, the increase in the spring constant due to the lowering of the sign body is small, and the sign body descends smoothly only by applying an external force enough to overcome the elastic force of the elastic support member and the return spring, for example, when the snow removal blade passes. Also, the sign body is surely lowered to allow this, and direct interference between them is avoided.

[0017] The invention described in claim 5 is the above-mentioned claim 1-
4. The method for producing a movable road sign according to any one of claims 4 to 5, wherein a ring-shaped elastic support member is molded by using a ring member and a sign body that are a part of the housing as inserts, and the ring is formed. Connecting the member and the sign body, and housing the sign body accompanied by the elastic support member and the ring member in the housing while interposing a return spring between the housing and the sign body, Joining the ring member and the housing inseparably and integrally.

Then, when the ring member and the housing are connected to each other, the ring member and the housing are connected in a state where the marker main body is kept in a lowered state with respect to the housing, and the connection is completed. Later, the space is brought into a negative pressure state by self-restoring the marker body by the force of the elastic support member and the return spring.

As a means for inseparably connecting the ring member and the housing, for example, caulking, which is one of plastic workings, is adopted, which is preferable in terms of the bonding strength and productivity.

Therefore, according to the fifth aspect of the present invention, the sign main body is accommodated so as to be lowered with respect to the housing, and the air in a region to be substantially a space is partially expelled. The ring member and the housing are non-separably integrated by caulking or the like. Thereafter, when the marker main body is restored with the elastic force of the elastic support member and the return spring to be in the raised state with respect to the housing, the internal pressure is reduced as the volume of the internal space increases, and the target negative pressure state is obtained. . As a result, there is no particular need for a means for creating a negative pressure in the space.

[0021]

According to the first aspect of the present invention, since the space in the housing in which the sign main body is housed is set in a negative pressure state in advance, it is possible to prevent the internal pressure from rising due to the descending operation of the sign main body. The lowering operation of the sign main body is smoothly performed without increasing the spring constant. As a result, it is possible to prevent the sign body from being damaged by the snow removing blade or the like, so that the operation reliability is enhanced and the maintenance and inspection work is facilitated. In addition, since the returning force of the marker body is obtained not only by the elastic support member but also by the return spring interposed between the housing and the marker body, the ascent and return operation of the marker body can be performed reliably and stably. Is

According to the second and third aspects of the present invention, since the compression coil spring or the buffer spring serving as the return spring is disposed at the center of the bottom of the housing and the sign body, particularly when the snow removal blade passes. Has an advantage that the snow removing blade can easily climb over the sign body more easily because it descends so as to incline from the peripheral part of the upper surface of the sign body which is hard to settle down by receiving the buffer spring force. .

Further, according to the fourth aspect of the present invention,
Since the cushioning rubber serving as the return spring is formed integrally with the marker body or the elastic support member, the number of components is reduced, which is advantageous in reducing the number of man-hours for component management and the manufacturing cost.

According to the fifth aspect of the present invention, the elastic support member is previously connected to the ring member which is a part of the housing, and then pushed into the housing so as to lower the sign main body into the housing. Since the ring and the housing, which are a part of the housing, are connected to each other in a reduced space, the space inside the housing is immediately restored if the sign body is restored to the housing so that the sign body is raised. Since the part is in a negative pressure state, there is no need for special means to make the space negative pressure,
This has the effect of simplifying the manufacturing equipment and improving the productivity.

[0025]

1 to 6 show the structure of a light-emitting road sign as a preferred embodiment of a movable road sign according to the present invention. FIG. 1 is a plan view and FIG. 1 is a sectional view taken along the line AA in FIG. 1, and FIG.
Sectional views along line B are shown.

As shown in FIGS. 1 to 3, the movable road sign is roughly divided into a substantially cylindrical housing 1 having an open top and a substantially cylindrical housing housed in the housing 1 so as to be vertically movable. Sign body 2, and the sign body 2 is interposed between the housing 1 and the sign body 2 and
And a rubber-based elastic supporting member 3 elastically supported so as to be able to move up and down, and as shown in FIG. And is buried in a road or the like so as to protrude by a predetermined amount a.

The space surrounded by the housing 1, the sign main body 2 and the elastic support member 3 is a completely closed space, and when no load is applied as shown in FIGS. In addition to the space 4 secured between the inner bottom surface 1a of the housing 1 and the bottom surface 2a of the sign body 2, the sign body 2
Is allowed to descend.

The housing 1 is provided with a housing body 5 having a flange 5a made of, for example, an aluminum alloy, and a housing 5 made of an aluminum alloy.
Outer ring 6 as a ring member integrally fixed to
As a result, the inner peripheral surface of the housing 1 is formed in a stepped shape by the upper inner peripheral surface 1a having a large diameter and the lower inner peripheral surface 1b having a small diameter.

A vertically extending rib 7 protrudes from the outer peripheral surface of the housing body 5 at an equally-divided position thereof, and the rib 7 penetrates the housing body 5 in the rib plate thickness direction. 5 is press-fitted with an anchor pin 8 oriented in a tangential direction of the outer peripheral surface of the anchor pin 8.
Is embedded in asphalt or the like, so that the entire movable road marking can be prevented from falling off.

The sign body 2 is formed around a bottomed aluminum alloy holder 9 having a cylindrical outer peripheral shape. It has a smooth stepped shape with a small diameter, and has a substantially rectangular accommodation space 10 inside.
The upper housing space 11 having a larger diameter than the upper housing space 11 has a stepped shape. In the lower housing space 10, a plurality of light emitting diodes 12 as light sources and the solar cell 1
3 and a storage battery 14 as a secondary battery are unitized as a luminous body unit 15 and fixed in place with screws 16 and are housed in the housing space 1 above the holder 9 in a sealing material. A light-transmitting plate (lens) 18 made of a polycarbonate resin or the like is fixed by pressure with a plurality of bolts 19 via a plurality of bolts 19. The upper surface of the light transmitting plate 18 is lower than the upper end surface of the holder 9 by a predetermined amount.

The light emitting diode 12 receives power supply from the solar cell 13 or the storage battery 14 and repeats flashing in red or orange at a rate of, for example, about 200 times / min, especially at night. The light is reflected by the reflecting portion 20 of the light transmitting plate 18 and emitted so as to be directed in the longitudinal direction of the road surface R, that is, in the vehicle traveling direction.

The elastic support member 3 fills a gap between the cylindrical inner peripheral surface 1a of the outer ring 6 forming a part of the housing 1 and the cylindrical outer peripheral surface of the holder 9 as the sign body 2. Are provided in an annular shape between them, are formed in a substantially inverted U-shaped cross section with a predetermined rubber material so as to swell upward, and the inner and outer peripheral surfaces thereof are vulcanized. It is fixed to the outer ring 5 and the holder 9 by bonding.

As shown in FIG. 1, the top of the annular elastic support member 3 has a pair of flat portions similar to a pair of raised portions 3a having a substantially mountain-shaped cross section which are opposed to each other in the circumferential direction. And the top of each raised portion 3a protrudes slightly above the upper end surface of the holder 9, and a pair of the light emitting diodes 12 described above is provided for each open concave 3b. The light emitting diode 1 is exposed through the open recess 3b.
2 is visible from the vehicle traveling direction.

That is, two front and rear portions of the upper end portion of the elastic support member 3 which are oriented in the longitudinal direction of the road surface R (vehicle running direction) are lower by one step as the open concave portion 3b having the groove angle θ. At the same time, the other portions are higher than the open concave portions 3b as the raised portions 3a, and these raised portions 3a are smoothly connected to the open concave portions 3b with the inclined surfaces 3c. Thereby, the light emitting diode 1
Irradiation light from 2 is irradiated in the longitudinal direction of the road surface from the open concave portion 3b without being blocked by the raised portion 3a.
As shown in FIGS. 1 and 2, an open recess 9 b is also formed on the upper end surface of the holder 9 under the same arrangement as the open recess 3 b on the elastic support member 3 side.

On the other hand, the outer peripheral surface and the bottom surface of the cylinder, which is the body of the holder 9, are covered with a cushion rubber layer 21 having a predetermined thickness which is formed integrally with the elastic support member 3 and is continuous therewith. . The elastic support member 3 and the cushion rubber layer 21 are vulcanized and bonded to the holder 9 and the outer ring 6 when the holder 9 and the outer ring 6 are formed into a predetermined shape by die molding using the insert as the insert. To the flange part 5 of the housing body 5
The outer ring 6 and the housing main body 5 are integrated by performing post-crimping work after fitting to a.

Here, since the maximum diameter of the cushion rubber layer 21 covering the holder 9 is formed smaller than the inner diameter of the housing body 5 by a predetermined amount, a gap G is secured between the two. With this gap G, the inner space of the elastic support member 3 and the lower space 4 of the marker main body 2 communicate with each other. At the same time, the inner peripheral surface of the housing body 5 forming a predetermined gap G with the cushion rubber layer 21 on the sign body 2 side also has a function of guiding the sign body 2 up and down.

The stopper rubber layer 22 is provided at a portion of the cushion rubber layer 21 corresponding to the bottom wall of the holder 9.
When the marker main body 2 is excessively lowered with respect to the housing 1, the stopper rubber layer 22 comes into contact with the inner bottom surface 1a of the housing 1 to exhibit a stopper effect and a buffer effect. It has become.

Of the housing body 5 and the holder 9, seat recesses 23 and 24 are formed in the center of the inner bottom surface 1 a of the housing body and the center of the bottom surface 2 a of the holder 9, respectively. Further, a compression coil spring (conical coil spring) 25 as a return spring is interposed in such a manner as to be positioned while being seated in the seating recesses 23 and 24. As a result, the marker body 2 is constantly urged upward, and a returning force acts.

The lower portion of the cushion rubber layer 21 covering the outer peripheral surface of the cylinder of the holder 9 has a circumferential groove 2.
6, a stopper pin 27 is press-fitted into the portion corresponding to the circumferential groove 26 of the housing body 5 from the outside at a position equally divided in the circumferential direction. Is engaged. These stopper pins 27 are for preventing the marker main body 2 from falling out of the housing 1 when the elastic support member 3 is cut between the housing 1 and the marker main body 2 for some reason. As the pin 27, for example, a small screw with a hexagonal head or a blind rivet is used. When each of the stopper pins 27 is pressed into a small hole formed in advance on the housing body 5 side, the sealing property of the housing body 5 is ensured by using a sealing agent or an adhesive together.

Therefore, according to the movable road sign of this embodiment, the elastic support member 3 is installed so as to protrude from the road surface R by a predetermined amount a as shown in FIG. When an external force acts on the marker body 2 from above, such as when the snow blade 28 of the car runs on or the vehicle runs on, the elastic support member 3 itself is bent downward for a predetermined stroke as shown in FIG. Within the range, the sign body 2 sinks down while tilting, and when the external force is unloaded, the sign body 2 returns to the original state again by the restoring force of the elastic support member 3 itself and the compression coil spring 25.

When the sign body 2 is settled, the space (including the space 4) surrounded by the housing 1, the sign body 2 and the elastic support member 3 is a completely closed space. Although the volume of the closed space gradually decreases as the main body 2 descends, since the closed space is in a negative pressure state in advance, the internal pressure rises due to the reduced volume of the closed space and the sign body 2 is settled down. The repulsive force, that is, the spring constant does not increase more than necessary. This allows
Even if the sinking and returning of the marker main body 2 are repeatedly performed, their operation is always performed smoothly and stably.

Further, since the spring force of the compression coil spring 25 acts on the center of the bottom of the sign body 2 as shown in FIG. 3, the sign body 2 is seen in a plan view shown in FIG.
There is a tendency that the peripheral portion of the marker body 2 closer to the elastic support member 3 is more likely to settle than the central portion. for that reason,
When the snow removal blade 28 starts to climb, the sign body 2 is immediately tilted and displaced so that the climbing side is lowered as shown in FIG. 4, thereby facilitating the smooth passage of the snow removal blade 28.

In addition, in the event that part or all of the elastic support member 3 is broken or cut by any chance, the original elastic force or restoring force of the elastic support member 3 always sufficiently acts on the marker main body 2. However, since the stopper pin 27 is engaged with the peripheral groove 26 on the sign body 2 side, the sign body 2 can be reliably prevented from jumping out or being pulled out of the housing 1.

Here, assuming the case of a conventional structure in which the internal space is not in a negative pressure state, as shown in FIG. The spring constant and, consequently, the repulsive force increase, and the sedimentation operation becomes slow. As a result, it becomes difficult for the snow removal blade 28 or the like to get over, and a part of the elastic support member 3 is bitten between the snow removal blade 28 as shown in FIG.

Next, an example of a procedure for manufacturing the movable road sign having the above structure will be described.

As shown in FIG. 6, a mold 30 composed of a combination of a plurality of upper dies 31 and lower dies 32 is prepared for molding the rubber-based elastic support member 3. The metal holder 9 and the outer ring 6 are set so as to have a predetermined positional relationship and then clamped. Thus, a space surrounded by the upper and lower dies 31, 32, the holder 9, and the outer ring 6 becomes a product section (cavity) to be the elastic support member 3 and the cushion rubber layer 21.

In this state, a predetermined rubber material is injected from an injection port 33 set at the center of the upper die 31 to form the elastic support member 3 and the like into a predetermined shape and vulcanization treatment is performed. The elastic support member 3 and the cushion rubber layer 21 are integrally molded while being vulcanized and adhered to the holder 9 so as to cover the outer peripheral surface of the holder 9. At the same time, the holder 9 and the outer ring 6 are connected via the elastic support member 3. When the elastic support member 3 and the like are formed, the holder 9 is removed from the mold 30 together with the elastic support member 3 and the like.

Since the upper die 31 is divided into a plurality of parts, it is possible to easily avoid an undercut relationship at a portion corresponding to the peripheral groove 26 of the holder 9 at the time of demolding.

Next, as shown in FIG.
The holder 9 integrated with the housing body 5 is mounted on the housing main body 5, and the stopper pin 27 is first pressed into the housing main body 5 and the stopper pin 27 is engaged with the peripheral groove 26, whereby the holder 9 from the housing main body 5 is moved. To prevent the falling off.
When press-fitting the stopper pin 27, a sealing agent or an adhesive is used together as described above. Further, a compression coil spring 25 is interposed between the holder 9 and the housing body 5 in advance before the stopper pin 27 prevents the stopper pin 27 from coming off.

Then, as shown in the figure, the holder 9 is pushed into the housing main body 5 to the limit, and the holder 9 is substantially restrained to the housing main body 5 so as to be in the lowest position. In this state, the housing 1 and the sign body 2
The sealed space (including the space portion 4), which is to be secured between the barrel holder 9 and the elastic support member 3, is in a reduced state. In this state, the outer ring 6 and the housing body are maintained. The housing 1 is assembled by non-separably connecting the housing body 5 and the outer ring 6 by performing relative positioning with respect to the flange portion 5a of 5 and caulking a part of the outer ring 6. The swaged portion of the outer ring 6 is indicated by reference numeral 6a.

When the caulking is completed, the space enclosed by the housing 1, the holder 9 and the elastic support member 3 becomes a completely closed space, so that the above constraint is released. As a result, the holder 9 is displaced upward with respect to the housing 1 by the restoring force of the elastic support member 3 and the compression coil spring 25, thereby increasing the volume of the closed section. The space surrounded by the support member 3 is in a predetermined negative pressure state.

Thereafter, the light emitting unit 15 is placed in the holder 9.
The movable road sign shown in FIGS. 1 to 3 is completed by incorporating the light transmitting plate 18 and the like.

As described above, according to the manufacturing method of the present embodiment, the housing 1 is improved by devising the assembling procedure.
The space surrounded by the holder 9 and the elastic support member 3 can be brought into a predetermined negative pressure state, and no special device or the like for negative pressure is required.

FIGS. 8 and 9 show a second preferred embodiment of the movable road marking according to the present invention, in which parts common to the first embodiment described above with reference to FIGS. Are given the same reference numerals.

In the second embodiment, instead of the compression coil spring 25 of the first embodiment, a hollow cylindrical cushion rubber 35 functioning as a return spring is provided at the center of the bottom surface of the holder 9. It is formed integrally with the stopper rubber layer 2 and vulcanized and bonded to the holder 9.

In this embodiment, not only does the cushion rubber 35 exhibit the same function as the compression coil spring 25, but also because the cushion rubber 35 is formed integrally with the holder 9, the number of parts can be reduced. Is advantageous.

Here, the buffer rubber 35 has a separate structure that is discontinuous from the stopper rubber layer 23 and is attached to the bottom surface of the holder 9 by means of an adhesive or press-fitting, or for example. At the time of forming the elastic support member 3, the cushioning rubber may be formed at the same time so as to be integrally formed on the bottom surface of the holder 9.

It is needless to say that the movable road marking according to the second embodiment can be manufactured by basically the same manufacturing procedure as that of the first embodiment shown in FIGS.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of a movable road marking according to the present invention.

FIG. 2 is a sectional view taken along the line AA in FIG. 1;

FIG. 3 is a sectional view taken along the line BB of FIG. 1;

FIG. 4 is a cross-sectional view showing a state where the snow removing blade has climbed up from the state of FIG. 3;

FIG. 5 is an operation explanatory view assuming a conventional structure.

FIG. 6 is an explanatory view of a process when the elastic support member of the movable road surface sign shown in FIGS.

FIG. 7 is an explanatory view of a process when assembling the components following the process of FIG. 6;

FIG. 8 is a sectional view showing a second embodiment of the movable road sign according to the present invention.

FIG. 9 is a sectional view showing a state in which the snow removing blade has climbed up from the state of FIG. 8;

FIG. 10 is a sectional view showing an example of a conventional movable road sign.

FIG. 11 is an explanatory view of the operation of the movable road sign shown in FIG. 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Housing 2 ... Sign main body 3 ... Elastic support member 4 ... Space part 5 ... Housing main body 6 ... Outer ring (ring member) 9 ... Holder 15 ... Light emitting unit 25 ... Compression coil spring (return spring) 28 ... Snow removal blade 30 … Mold 35… Buffer rubber (return spring)

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Daiichiro Hirukawa 330, Naganuma-cho, Inage-ku, Chiba-shi, Chiba Kinu Kawa Rubber Industries Co., Ltd. (72) Hirokazu Kawashima 330-Naganuma-cho, Inage-ku, Chiba-shi, Chiba Kinugawa Rubber Industries, Ltd. (72) Inventor Yukio Sugawara 330, Naganuma-cho, Inage-ku, Chiba City, Chiba Prefecture

Claims (5)

[Claims] 1. A substantially cylindrical housing having a bottom and an open top, a sign body housed in the housing and having a light-emitting function or a reflection function, and a sign body interposed between the housing and the sign body. A rubber-based elastic support member elastically supporting the sign body so as to be vertically movable with respect to the housing while connecting the housing and the sign body, and at least between the housing and the sign body, A movable road surface marker having a sealed space for allowing descent, wherein the space is set to have a negative pressure when the sign body is raised with respect to the housing. And a return spring for urging the sign body upwards is interposed between the housing and the sign body. 2. The method according to claim 1, wherein the return spring is a compression coil spring, and the compression coil spring is interposed between the center of the bottom of the housing and the center of the bottom of the sign body. 2. The movable road sign according to 1. 3. The return spring is a cushion rubber, and the cushion rubber is interposed between the center of the bottom on the housing side and the center of the bottom of the sign body.
The movable road sign according to the item. 4. The movable road surface according to claim 3, wherein the cushioning rubber is formed integrally with a rubber-based elastic support member connecting the housing and the sign body or the sign body. Signs. 5. A method for manufacturing a movable road sign according to claim 1, wherein the ring member and the sign body, which are a part of the housing, are used as inserts, and a rubber-based elastic support member is used. Forming a mold and connecting the ring member and the sign body, and a sign body provided with the elastic support member and the ring member while interposing a return spring between the housing and the sign body. And housing the ring member and the housing inseparably integrated with each other. When the ring member and the housing are connected, the sign body is lowered with respect to the housing. The ring member and the housing are connected in a state where they are maintained so that the sign body is self-restored by the force of the elastic support member and the return spring after the connection is completed. Manufacturing method of the movable die road markings, characterized in that between portion and the negative pressure state.