JP2000251195A - Road information display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely drive an auxiliary display plate and fix it at an erected position and a laid position by a simple and strong structure. SOLUTION: This device is provided with a display device main body where a display part for road information display is provided on the front surface, the auxiliary display plate 110 freely rotatably attached to the display device main body and an auxiliary display plate driving mechanism 12 for rotating the auxiliary display plate 110 between the erected position and the laid position with respect to an attaching surface. The auxiliary display plate driving mechanism 12 is provided with a nut part 24 attached to the auxiliary display plate 110 freely rotatably around a first axis C parallel to the rotary shaft 16 of the auxiliary display plate 110 and provided with a female screw hole in a direction orthogonal to the first axis C, a screw rod 22 for which one end side is supported freely swingably within a plane where the female screw hole moves attending on the rotation of the auxiliary display plate 110, the other end side is supported freely rotatably around an axis and the nut part 24 is screwed onto one end side projected from the display device main body and an electric motor 32 for rotating the other end side of the screw rod 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road information display device which is installed on a road such as an expressway and provides a driver by displaying road information such as road conditions and congestion conditions.

[0002]

2. Description of the Related Art Such a road information display device 100 is
As shown in FIG. 6, a pillar 10 is provided on a roadside zone of a road such as an expressway.
2 and the like, and a display device main body 106 provided with a display unit 104 for displaying road information as shown in FIG. 6 and FIG. When the display operation of the display unit 104 is stopped, the auxiliary display stands up from the mounting surface (the side surface as an example in FIGS. 6 and 7) 108 of the display device main body 106 and indicates that the display operation of the display unit 104 is not normal. A general configuration includes a plate 110 and an auxiliary display plate driving mechanism (not shown) for rotating the auxiliary display plate 110 between an upright position A with respect to the mounting surface 108 and a prone position (also referred to as a prone position) B. It is.

[0003] The auxiliary display panel 110 is provided with a surface (display surface) on which, for example, “under test” or “under adjustment” is displayed. The driver passing through the road is in a state where the display such as "under test" cannot be seen because the vehicle is in a state of being faced down facing the mounting surface 108 of the vehicle. Since the display surface of the plate 110 faces the front similarly to the display unit 104 of the display device main body 106, the driver can recognize a display such as "under test". As described above, the reason why the auxiliary display panel 110 is provided is that, for example, when the display unit 104 of the display device main body 106 is in a non-display state due to a power failure, failure, test, adjustment, or the like, or when the displayed information is incorrect, This is for notifying the driver that the operation of the display unit 104 is not normal and preventing incorrect information from being transmitted.

Conventionally, such a road information display device 100
Japanese Patent Application Laid-Open No. 10-261196 discloses an auxiliary display device having an auxiliary display plate and an auxiliary display plate driving mechanism. The schematic configuration is as follows: a case, a columnar rotating shaft that is pivotally supported by the case and both ends protrude from the case, a pair of L-shaped fittings attached to both ends of the rotating shaft, and this L-shaped fitting attached to the back surface. An auxiliary display plate that is rotatable about the rotation axis by a mold, an electric motor that rotates the rotation shaft by rotating a large spur gear attached to the rotation shaft via a small spur gear, and an auxiliary display plate A door closer that generates an urging force for urging the auxiliary display panel in the upright direction when it falls down, and a rotating shaft that accumulates this urging force in the door closer when the rotating shaft rotates. A sprocket mounted on the door sprocket and the door closer, and a chain spanned between the two sprockets. Of these components, other components except the auxiliary display panel and the case constitute an auxiliary display panel driving mechanism.

[0005] Further, the auxiliary display device is provided in order to prevent the auxiliary display plate from being shaken by the wind when the auxiliary display plate is moved to the prone position (prone position) B and the upright position A. Is provided separately from the auxiliary display plate driving mechanism. The outline of the stop mechanism is as follows: a wheel having a hole attached to the rotating shaft, a solenoid support provided to face the wheel, and a solenoid support provided on the same circumference around the rotating shaft. And two solenoids which are positioned and shifted by 90 degrees about the rotation axis. Further, each movable iron core (not shown) and the hole of each solenoid are on the same circumference around the rotation axis. The operation is such that when the auxiliary display plate moves to the prone position B, the movable iron core of one solenoid fits into the hole of the wheel, and when the auxiliary display plate moves to the standing position A, the other solenoid moves. The insertion of the iron core into the hole of the wheel prevents the rotation of the rotating shaft and prevents the auxiliary display plate 110 from being shaken by the wind.

[0006]

However, in the above-described road information display device, the auxiliary display device is provided with an auxiliary display plate driving mechanism for rotating the auxiliary display plate 110 and an auxiliary display plate 110 for preventing the auxiliary display plate 110 from being shaken by wind. It is necessary to incorporate each of the stop mechanism parts as independent mechanisms,
Since the number of parts increases and the number of manufacturing processes increases accordingly, there is a problem that the product cost increases. In particular, in order to stop the structure of the stop mechanism with little backlash, it is necessary to reduce the tolerance between the inner diameter of the hole of the wheel and the outer diameter of the movable iron core of the solenoid fitted into the hole. Since high accuracy is required, the processing is troublesome and causes an increase in product cost. Further, it is conceivable that the installation location of the road information display device is on a road where dust or the like is likely to be generated, and the dust or the like may enter the inside of the device and adhere to a portion with high processing accuracy. There is also a problem of becoming.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to solve the above-mentioned problems, and an object of the present invention is to provide a road which can reliably drive an auxiliary display panel and fix it at a standing position and a prone position with a simple and robust structure. An object of the present invention is to provide an information display device.

[0008]

According to a first aspect of the present invention, there is provided a road information display apparatus according to the present invention.
A display device main body provided with a display unit for displaying road information at the front thereof, and a display device main body mounted rotatably on the display device main body, when the display unit stops performing a normal display operation. An auxiliary display plate that stands up from the surface and displays that the display operation of the display unit is not normal, and an auxiliary display plate driving mechanism that rotates the auxiliary display plate between an upright position and a prone position with respect to the mounting surface. In the road information display device provided, the auxiliary display board driving mechanism is attached to the auxiliary display board so as to be rotatable about a first axis that is separated from a rotation axis of the auxiliary display board and parallel to the rotation axis. And a nut portion having a female screw hole formed along a direction orthogonal to the first axis, and one end side is swingable in a plane in which the female screw hole moves when the auxiliary display plate rotates. And the axis The other end is rotatably supported as a center, and the one end protruding from the display device main body is screwed with the nut portion screwed therein. And an electric motor that rotates the end side.

According to this, the nut portion attached to the auxiliary display plate is moved along the longitudinal direction of the screw rod by the rotation of the screw rod, whereby the auxiliary display plate is rotated. Is stopped, the nut portion, that is, the auxiliary display plate is securely moved with respect to the screw rod within an assembly error range of the male screw formed on the outer peripheral surface of the screw rod and the female screw formed in the female screw hole of the nut portion. Be regulated. Therefore, it is not necessary to provide a special stop mechanism as in the related art separately from the auxiliary display panel driving mechanism.

[0010] Further, as a specific configuration for swingably supporting the screw rod, as an example, the other end of the screw rod is provided with:
One joint member of a pair of joint members constituting the universal joint is connected, and the other joint member of the pair of joint members moves in the thrust direction by a bearing fixed inside the display device main body. The drive shaft, which is rotatably supported in a state where the amount is regulated within a predetermined amount, receives the rotational force of the electric motor and rotationally drives the other joint member of the pair of joint members, is provided in the thrust direction. A configuration in which the other joint member is integrally and rotatably connected to the other joint member with a play larger than the moving amount can be adopted. According to this configuration, the screw rod is rotatably driven by the drive shaft through the universal joint, so that the one end side of the screw rod can be swingably supported.
In addition, when the auxiliary display plate is blown by wind, a force along the longitudinal direction is applied to the screw rod, but even in this case, the force is received by the bearing and is not applied to the drive shaft driven by the electric motor. Therefore, even when the drive shaft is directly used as the output shaft of the electric motor, a large external force does not directly act on the electric motor, which is a precision device, and the occurrence of a failure can be suppressed to a very low level.

When the auxiliary display plate is located at the upright position, if the axes of the pair of joint members of the universal joint and the axis of the screw rod are aligned, the auxiliary display plate is added to the auxiliary display plate. In the standing position where the external force from the wind is greatest, the external joint can receive the force applied to the screw rod by this external force in a state where the universal joint connected to the screw rod is aligned with the screw rod. Therefore, no external force is applied to the screw rod, universal joint, or bearing in the bending direction or the torsion direction, and the external force can be received in a state that is strongest against the external force.

Further, when the auxiliary display panel is located at the prone position, the axis of the pair of joint members of the universal joint and the axis of the screw rod are arranged in a straight line. As in the case of being located in the upright position, even if external force is applied to the screw rod, universal joint or bearing when the auxiliary display plate is blown by the wind, a state in which these members are strongest against external force, An external force can be received in a state of being linearly connected, and the occurrence of a failure can be further reduced.

Further, as another example of the concrete structure for swingably supporting the screw rod, the following structure can be adopted. That is, the screw rod is rotatably supported in a state in which the amount of movement in the thrust direction is regulated within a predetermined amount by a bearing rotatably supported at the other end inside the display device main body. A drive shaft that is rotatably supported at one end in the plane in which the female screw hole moves and rotatably about an axis, and rotationally drives the other end of the screw rod by receiving the rotational force of the electric motor, The screw rod is connected to the other end of the screw rod so as to be rotatable integrally with the play amount of the movement in the thrust direction, and is rotatable integrally with the bearing.

The rotation position of the auxiliary display panel from the prone position is determined by detecting the number of rotations of the electric motor, so that, for example, the rotation angle of the auxiliary display panel provided in the auxiliary display panel drive mechanism Can be realized with a simple structure, and the angle detection mechanism can be provided inside the main body of the display device to which the electric motor is fixed. The durability of the display device can be improved.

Further, a magnet is provided on the auxiliary display panel, and a proximity sensor which detects a magnetic force of the magnet and outputs a signal only when the auxiliary display panel is moved to the prone position inside the display device body. With this configuration, even if the current rotation position of the auxiliary display panel becomes unknown due to a power failure or the like, the auxiliary display panel can be returned to the initial position in the prone position by rotating the auxiliary display panel in the prone direction. . In addition, the magnet that does not cause any problem even when exposed to wind and rain is attached to the auxiliary display panel side, while the proximity sensor, which is a precision device that detects the magnetic force of the magnet, is provided inside the display device main body. There is no decrease in durability.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the road information display device according to the present invention will be described below in detail. Note that the same components as those described in the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted. First, a schematic configuration of the road information display device 10 will be described. The configuration of the road information display device 10 is basically substantially the same as that of the conventional example, and as shown in FIG.
6, an auxiliary display plate 110 rotatably attached to the display device main body 106, and the auxiliary display plate 110
8 is provided with an auxiliary display plate driving mechanism (not shown in FIG. 6) for rotating between an upright position A and a prone position B with respect to FIG.

Next, the auxiliary display panel driving mechanism 12 for rotating the auxiliary display panel 110, which is a feature of the present invention, will be described in detail. As shown in FIGS. 1 to 4, the auxiliary display panel 110 includes, as an example, an L-shaped bracket 14 attached to a back surface.
The display device 106 is attached to the mounting surface 108 of the display device main body 106 so as to be rotatable about the rotation shaft 16 by using a and 14b.
The L-shaped fittings 14a and 14b are, for example, the display device main body 10.
6 is rotatably mounted on a fixed plate 18 provided directly on the mounting surface 108. Further, when the auxiliary display plate 110 is rotated to the upright position A at 90 degrees with respect to the mounting surface 108 to restrict the further rotation of the auxiliary display plate 110, Mold fittings 14a, 14
A restricting angle 50 having an L-shaped cross section, which comes into contact with b, is disposed in parallel with the rotating shaft 16 as a stopper. As described later, when the auxiliary display panel 110 is rotated to the prone position B, a stopper for restricting the auxiliary display panel 110 from rotating further may be provided. As shown in FIG. 1 and FIG. 2, a pair of L-shaped cross-section angles 20a and 20b are attached in parallel in the area between the pair of L-shaped brackets 14a and 14b on the back surface of the auxiliary display panel 110. And
The end in the direction of the rotation axis 16 protrudes from the auxiliary display panel 110. And, this pair of projecting angles 20
A nut holding bracket 22 (a U-shape as an example) is mounted between the end portions a and 20b so as to be separated from the rotation shaft 16 and rotatable about a first axis C parallel to the rotation shaft 16. The first axis C is attached to the nut holding member 22.
A nut portion 24 having a female screw hole (not shown) formed along a direction perpendicular to the nut is non-rotatably mounted.

The screw rod 26 is configured such that one end of the screw rod 26 can swing freely in a plane in which the female screw hole moves when the auxiliary display plate 110 rotates about the rotation shaft 16, and the screw rod 26 itself has its axis line. The other end is supported by a configuration described later (a configuration using a universal joint and a bearing) so as to be rotatable around the center. One end of the screw rod 26 projects from a hole, which will be described later, provided on the mounting surface 108 of the display device main body 106 and is screwed to the nut portion 24. The other end of the screw rod 26 is connected to one joint member 28a of a pair of joint members 28a and 28b constituting the universal joint 28. The universal joint 28 is arranged inside the display device main body 106 so as not to be exposed to the weather. Also,
The other joint member 28 b of the universal joint 28 is rotatably supported by a bearing 30 fixed inside the display device main body 106, and receives the rotational force of the electric motor 32 arranged inside the display device main body 106. It is connected to a drive shaft 32a that is driven to rotate. The drive shaft 32a and the other joint member 28b are arranged in the plane on which the screw rod 26 is arranged. In the present embodiment, the drive shaft 32a is configured to be the output shaft of the electric motor 32 with a reduction gear. For example, the drive shaft 32a is provided separately from the output shaft of the electric motor 32 with a reduction gear. The cost and the positional relationship between the drive shaft 32a and the electric motor 32 may be reduced, for example, by attaching a sprocket or pulley to the shaft and connecting the sprockets or pulleys to each other with a chain or a belt to transmit the rotational force of the electric motor 32 to the drive shaft 32a. Various changes can be made in consideration of the above. In addition, a battery (not shown) for supplying electric power for operating the electric motor 32 at the time of a power failure is also provided inside the display device main body 106 as a part of the auxiliary display plate driving mechanism 12.

The bearing 30 corresponds to the position of the hole 34 for projecting the screw rod 26 provided on the mounting surface 108 of the display device main body 106 outward, as shown in FIGS. A box-shaped mounting bracket 3 is provided on the inner side of the mounting surface 108.
6 are supported. Box type mounting bracket 36
The surface facing the hole 34 is open, and the bearing 30 is attached to and supported by the opening facing surface 36a. That is, the mounting surface 1 of the display device body 106
08 in accordance with the position of the hole 34 provided in the mounting surface 108.
When the box-shaped mounting member 36 is fixed to the inner surface of the mounting surface 108 from the inside, a concave portion is formed in the mounting surface 108. In addition, a universal joint 28 attached to the other end of the threaded rod 26 is arranged in the recess, for example, as shown in FIG. Also, due to such a structure, it is conceivable that rain blows into the recess. Therefore, in order to easily drain the rain that has entered the recess, the inner bottom surface of the recess, that is, the box-shaped mounting bracket 3
The inner lower surface of 6 is formed on a slope as shown in FIG.
The other joint member 28b of the universal joint 28 includes
The shaft 3 constituting a part of the other joint member 28b
8 are connected. The shaft 38 is rotatably inserted into and supported by the bearing 30 as shown in FIG. 5, and the first flange portion 3 is provided on the outer peripheral surface of the end on the drive shaft 32a side.
8a is formed, and a through hole 38b into which the tip of the drive shaft 32a can be inserted is formed in the end face, and the other end is connected to the other joint member 28b. The first flange portion 38a is provided with a tightening screw 40 which is screwed from the outer peripheral surface toward the through hole 38b and whose tip can freely protrude into the through hole 38b.

The other joint member 2 of the universal joint 28
8b and the shaft 38 are connected by inserting the distal end of the shaft 38 into an insertion hole 42 provided on the end face of the other joint member 28b having a larger diameter. As an example, the fixing pin 44 is connected to the other joint member 28b. The end is inserted through the insertion hole 42 and inserted through the tip of the inserted shaft 38 so as to be irremovably connected. The connection structure between the screw rod 26 and one joint member 28a is substantially the same. Further, the distance L between the end face of the first flange portion 38a provided on the shaft 38 on the bearing 30 side and the end face of the other joint member 28b connected to the shaft 38 is determined by the thickness of the bearing 30 and the mounting bracket 36. The length is set slightly longer so as not to be extremely longer than the length M obtained by adding the plate thickness and the plate thickness of the reinforcing plate described later. Shaft 3
8 moves in the thrust direction in the bearing 30, the first
Since the end face of the flange portion 38a contacts the reinforcing plate and the end face of the other joint member contacts the end face of the bearing 30,
The amount of movement of the shaft 38 in the thrust direction within the bearing 30,
That is, the other joint member 28b constituting the universal joint 28
Is restricted to a predetermined amount (LM) in the thrust direction.

The first flange portion 38 of the shaft 38
A connection structure between the output shaft (drive shaft) 32a of the electric motor 32 inserted into the through hole 38b and the shaft 38 will be described. The through hole 38b extends along the axis of the shaft 38,
It has a circular cross section. On the other hand, at the tip of the output shaft 32a, as shown in FIG. 5, a part of the outer peripheral surface is formed flat, and the cross-sectional shape is formed non-circular. And the first
The tip of the tightening screw 40 screwed into the flange portion 38a protrudes from the inner peripheral surface of the through hole 38b, and the end surface faces the flat portion of the output shaft 32a at a slight distance. Also,
The gap between the inner bottom surface of the through hole 38b and the tip of the output shaft 32a is set to be slightly larger than the amount of movement of the shaft 38 in the thrust direction in the bearing 30.

With this structure, when the output shaft 32a rotates, the flat portion of the output shaft 32a and the tip of the tightening screw 40 interfere with each other to rotate the shaft 38 integrally with the output shaft 32a. Even if the shaft 38 is moved in the thrust direction by an external force, there is play in the thrust direction between the inner bottom surface of the through hole 38b of the shaft 38 and the tip of the output shaft 32a, and the amount of movement of the shaft 38 in the thrust direction is a predetermined amount. (A movement amount smaller than this play), no external force is applied to the output shaft 32a.
Therefore, it is possible to prevent the electric motor 32 from being damaged by an external force. The output shaft 32a and the shaft 38 can also be integrally rotated by making the cross-sectional shape of the through hole 38b similar to the cross-sectional shape of the output shaft 32a of the electric motor 32, and by slightly increasing the outer shape. . In this case, the tightening screw 40 becomes unnecessary.

Further, since the external force received by the auxiliary display plate 110 from the wind is transmitted in the order of the screw rod 26 → the universal joint 28 → the shaft 38 → the bearing 30 → the mounting bracket 36, it serves as a fixing surface of the bearing 30 of the mounting bracket 36. The strength of the facing surface 36a needs to be sufficient. For this reason, the mounting bracket 3
The reinforcing plate 46 is disposed on the facing surface 36a of the sixth bearing 30.

Further, in this embodiment, the electric motor 32 is also attached to the facing surface 36a of the mounting bracket 36. However, even if the external force from the wind is large and the facing surface 36a of the mounting bracket 36 is slightly inclined. An abnormal force must be prevented from acting on the output shaft 32a of the electric motor 32, which is the drive shaft 32a. For this reason, the electric motor 32 has a structure in which a U-shaped motor mounting base 48 is mounted on the reinforcing plate 46 and fixed to the motor mounting base 48. As a result, the facing surface 36a of the mounting bracket 36 is temporarily bent, and accordingly the reinforcing plate 46 is attached to the mounting surface 108 of the display device main body 106.
, The electric motor 32 attached to the reinforcing plate 46 and the bearing 30 attached to the facing surface 36a.
And the electric motor 32 (the output shaft 3
The positional relationship between 2a) and the shaft 38 inserted in the bearing 30 does not change. Therefore, the structurally weak electric motor 32
Can be prevented from directly applying an external force to the output shaft 32a, and damage to the electric motor 32 can be avoided. The mounting bracket 36 and the motor mounting base 48 are designed so that the axis of the drive shaft 32a is perpendicular to the mounting surface 108.

Further, the road information display device 1 according to the present embodiment
0, the nut portion 24 screwed to the screw rod 26 is rotated by the electric motor 32 rotating forward and reverse, and the screw rod 26 is also rotated forward and reverse. It moves forward and backward along the longitudinal direction. The auxiliary display panel 110 is provided with a nut portion 24 that moves back and forth along the screw rod 26.
, And rotates between the upright position A and the prone position B around the rotation shaft 16. At this time, nut part 2
4 (the first axis C of the nut holding fixture 22 to which the nut portion 24 is fixed) is the rotation axis of the auxiliary display panel 110.
Draws an arc centered at 6, which is a screw rod 2
6 is connected to a drive shaft 32a (in this embodiment, an output shaft of the electric motor 32) by a universal joint 28, and a nut portion 24 screwed to a screw rod 26 is attached to the nut holding fitting 22 to form a screw rod 26. This is possible because the structure is such that it can rotate according to the inclination of.

For example, if the structure shown in FIG. 8 is adopted, the female threaded hole of the nut part 24 moves the screw rod 26 in accordance with the nut part 24 which moves while drawing an arc without using the universal joint 28. One end side can swing freely in the plane
And it can be rotatable about the axis. The structure is such that the mounting bracket 36 to which the bearing 30, the motor mounting base 48, and the electric motor 32 are mounted is not fixed to the mounting surface 108 of the display device main body 106, but the axis of the bearing 30 is provided in the display device main body 106. Has a structure in which the bearing 30 is rotatably arranged about a second axis E parallel to the rotating shaft 16 so as to swing in a plane in which the female screw hole of the nut portion 24 moves. The shaft 38 rotatably supported by the bearing 30 is connected to the other end of the threaded rod 26 so that both axes are aligned. The universal joint 28
As in the case where the external force is applied directly to the drive shaft 32a due to the wind applied to the screw rod 26 as in the case of using the
The amount of movement of the shaft 38 in the thrust direction is the same as that when the above-mentioned universal joint 28 is used, and the amount of movement of the shaft 38, that is, the screw rod 26 connected to the shaft 38, in the thrust direction is within a predetermined amount. To be regulated. Therefore, although not shown, the other end of the screw rod 26 is formed to have a larger diameter than the shaft 38 similarly to the end of the other joint member 28b, and the other end of the screw rod 26 has Is provided to have an insertion hole 42 into which is inserted.

In the present embodiment, the first
Although the axis C moves in an arc, the position of the first axis C when the auxiliary display panel 110 moves to the upright position A shown in FIG. 4 and the prone position B shown in FIG. It is set so as to be located on the axis D of the drive shaft 32a perpendicular to the mounting surface 108. That is, when the auxiliary display plate 110 is in both the upright position A and the prone position B, the pair of joint members 28a and 28b of the universal joint 28 are aligned on the axis D of the drive shaft 32a, and The screw rod 26 is also arranged in a straight line on the axis D. Thus, when the auxiliary display plate 110 is in both the upright position A and the prone position B, the pair of joint members 28
a, 28b and the screw rod 26 are aligned with each other, and receive the external force from the wind in a state where the screw rod 26, the universal joint 28, and the bearing 30 are strong against the external force in which the force in the bending direction and the torsion direction is not applied. Will be able to Therefore, the probability of occurrence of a failure or the like can be extremely reduced.

In the present embodiment, as described above, even when the auxiliary display plate 110 is at the protruding position A together with the protruding position B, the pair of joint members 28a and 28b of the universal joint 28 are provided.
And the screw rod 26 are arranged in a straight line on the axis D of the drive shaft 32a. However, when the auxiliary display panel 110 receives the greatest force from the wind is the upright position A, while the auxiliary display plate 110 is in the prone position B, It is considered that the force received from the wind is not so large as to be in the standing position A because it is in a position parallel to and close to the mounting surface 108 of the display device body 106. Therefore, at least at the standing position A, the pair of joint members 28 of the universal joint 28
a, 28b and the screw rod 26 may be arranged in a straight line on the axis D of the drive shaft 32a.

In this embodiment, the auxiliary display panel 11
The rotation angle between the 0 standing position A and the prone position B is set to a predetermined angle of 90 degrees. Therefore, in order to rotate to the standing position A based on the prone position B, it is necessary to stop the electric motor 32 when the auxiliary display panel 110 is rotated by 90 degrees after detecting the rotational position (rotation angle). The detection of the rotation position of the auxiliary display panel 110 has a structure in which the rotation number of the electric motor 32 is detected and obtained. Specifically, as shown in FIG. 1 as an example, an encoder (not shown) that rotates with the rotation of the electric motor 32
It is conceivable to use a rotation number detector 52 having a sensor (optical sensor or the like) for detecting the rotation number of the encoder. The encoder may be mounted on the output shaft of the electric motor 32 or after deceleration.
6 may be the other end. In the case of such a rotation speed detector 52, since the rotation speed detector 52 can be provided inside the display device main body 106 to which the electric motor 32 is fixed, the rotation speed detector 52 is exposed to wind and rain. Since it is not performed, the durability of the road information display device 10 can be improved. The rotation speed of the electric motor 32 detected by the rotation speed detector 52 is input to the auxiliary display panel control unit 54 provided as a part of the auxiliary display panel driving mechanism 12, and the rotation angle of the auxiliary display panel 110 is calculated. . The auxiliary display panel control unit 54 can be composed of a microcomputer, a memory, and the like. At the time of a power failure, power is supplied from a battery to the rotation speed detector 52 and the auxiliary display panel control unit 54, similarly to the electric motor 32.

In the case where the angle of the auxiliary display panel 110 is detected from the rotation speed of the electric motor 32 without directly detecting the angle of the auxiliary display panel 110, for example, If a power failure occurs while the motor is rotating, the current rotational position of the auxiliary display panel 110 is unknown due to, for example, detecting the power failure and canceling the rotational speed of the electric motor 32 stored in the memory or the like. It is considered that Even in such a case, the auxiliary display panel 11
It is necessary that the rotation position of 0 can be accurately grasped by detecting the rotation speed of the electric motor 32. For this reason, when the auxiliary display panel 110 moves to a certain position with respect to the mounting surface 108 of the display device main body 106, such as the upright position A or the prone position B, it can be detected that the auxiliary display plate 110 has moved to that position. It is preferable that the number of rotations of the electric motor 32 be initialized.

In the present embodiment, as an example, it is configured to detect that the auxiliary display panel 110 has moved to the prone position B. Specifically, the auxiliary display panel 11 exposed to the weather
0 is provided with a magnet 56 whose function is less deteriorated even when it is exposed to wind and rain, and inside the display device main body 106 only when the auxiliary display plate 110 is moved to the prone position B (for the first time when moved). A proximity sensor 58 that detects the magnetic force of the magnet 56 and outputs a signal is provided. When the auxiliary display panel 110 is moved to the prone position B as shown in FIG. 1, the nut holding bracket 22 is attached to the mounting surface 108 of the display device main body 106.
, The magnet 56 is provided on the nut holding fixture 22, and the proximity sensor 58 is provided near the mounting surface 108 of the display device main body 106 where the magnet 56 approaches. The mounting positions of the magnet 56 and the proximity sensor 58 are not limited to the above positions. The configuration of the auxiliary display panel driving mechanism 12 has been described above.

Next, the operation of the auxiliary display panel driving mechanism 12 will be described. First, the auxiliary display panel 110 is in the prone position B. Since the auxiliary display panel 110 is located at the prone position B, the signal a indicating from the proximity sensor 58 that the auxiliary display panel 110 is at the prone position B is transmitted to the auxiliary display panel control unit 54 of the auxiliary display panel drive mechanism 12. Is entered. Auxiliary display panel control unit 5 that detects that this signal a is being input
In step 4, a value corresponding to the prone position B is written to a memory area for storing the number of rotations of the electric motor 32, and the value is initialized. For example, since the prone position B is set as the reference position, zero is written. Next, a worker who comes to the road information display device 10 by wire or wirelessly from outside the road information display device 10 operates an operation unit (not shown) provided in the road information display device 10. When the rotation instruction b is input to the auxiliary display panel control unit 54, the electric motor 32 is operated in the auxiliary display panel control unit 54, and the screw rod 26 is moved in a predetermined direction via the drive shaft 32a and the universal joint 28. (Positive direction).

The rotation of the screw rod 26 causes the screw rod 26 to rotate.
Starts moving toward one end side (free end side) of the screw rod 26 which can swing along the longitudinal direction of the screw rod 26. By the movement of the nut portion 24, the nut portion 24 gradually separates from the mounting surface 108 of the display device main body 106. Therefore, the auxiliary display plate 110 rotatably mounted on the mounting surface 108 is set in the upright position around the rotation shaft 16. Start rotation toward A. Auxiliary display board control unit 5
In 4, the number of rotations of the electric motor 32 after the auxiliary display plate 110 has left the prone position B is detected via the rotation speed detector 52, and based on the detected number of rotations, the auxiliary display plate 110 is detected from the prone position B. Is calculated.

Then, it is always detected whether or not the obtained rotation angle becomes 90 degrees. When the rotation angle reaches 90 degrees, the operation of the electric motor 32 is stopped. More specifically, when the auxiliary display panel 110 is rotated by 90 degrees, the L-shaped brackets 14a and 14b that rotatably support the auxiliary display panel 110 abut against the regulating angles 50 as stoppers, and the rotation of the auxiliary display panel 110 is stopped. Although regulated, the auxiliary display panel control unit 54 is set so as to rotate the electric motor 32 a little further. As a result, the nut portion 24 screwed to the screw rod 26 and the restricting angle 50 are stuck together, and the screw rod 2
The play between the male screw formed on the outer peripheral surface of the nut 6 and the female screw of the nut portion 24 and the play associated with the clearance of other mechanisms are absorbed and lost, and even if the auxiliary display plate 110 is blown by the wind. It is possible to prevent rattling and vibration. As a result, the auxiliary display panel 110 is moved 90
It can be rotated to the open position, that is, the upright position A, and stopped.

On the other hand, when rotating from the standing position A to the lying position B, the electric motor 32 is rotated in the opposite direction. Then, based on the rotation speed of the electric motor 32 detected and counted when rotating from the prone position B to the standing position A, the electric motor 32 detected through the rotation speed detector 52 is detected.
The rotation speed of is subtracted. Since the rotation speed obtained by this subtraction is the rotation speed of the electric motor 32 from the prone position B, the rotation of the auxiliary display panel 110 from the prone position B is performed in the same manner as the rotation from the prone position B to the standing position A. The rotation angle can be calculated and calculated. Then, it is always detected whether or not the obtained rotation angle becomes 0 degree, and when it reaches 0 degree, the operation of the electric motor 32 is stopped. Thus, the auxiliary display panel 110 can be stopped by rotating to the prone position B. Here, in the prone position B, similarly to the case of the upright position A, a stopper (not shown) similar to the restricting angle 50 is provided on the mounting surface 108, and, for example, as shown in FIG. L projecting from the side of
The auxiliary display panel 110 is in the prone position B when the mold fittings 14a and 14b are
It is also possible to adopt a configuration in which the electric motor 32 is rotated slightly extra even after contacting with the stopper when moving to the position to absorb the play of each mechanism. It is to be noted that, even if the angle is not determined each time, the rotation speed of the electric motor 32 when the auxiliary display panel 110 becomes 90 degrees is obtained in advance,
Naturally, it is also possible to perform the rotation control between the prone position A and the upright position A of the auxiliary display panel 110 using only the detected number of rotations.

An operation in the case where the detected rotation number or rotation angle of the electric motor 32 is canceled due to a power failure or the like will be described. In this case, the auxiliary display panel control unit 54 first
The electric motor 32 is operated so that the auxiliary display panel 110 rotates in the prone position B direction. Then, whether or not a signal is input from the proximity sensor 58 is constantly detected, and the rotation of the electric motor 32 is stopped when the signal is detected.
Then, the value corresponding to the prone position B is stored in the memory area where the count value of the number of rotations is stored, and is initialized. Thereafter, since the count value of the number of revolutions stored in the memory area matches the position of the auxiliary display panel 110, the above-described normal operation can be performed.

In the above-described embodiment, the auxiliary display panel 110 is disposed directly on the mounting surface 108 of the display device main body 106, and the main part of the auxiliary display panel driving mechanism 12 is disposed inside the display device main body 106. Thus, the auxiliary display panel 110 forms a part of the road information display apparatus 10. However, for example, as in the conventional example, the auxiliary display panel driving mechanism 12 and other control mechanisms are connected to the road information display apparatus 10. The auxiliary display device itself is housed in a housing (a case in a conventional example) separate from the display device main body, and the auxiliary display plate 110 is rotatably attached to this housing, so that the auxiliary display device itself is independent of the road information display device 10. Various modifications, such as a good form, are possible.

[0038]

According to the road information display device of the present invention, the nut portion attached to the auxiliary display plate moves along the longitudinal direction of the screw rod by the rotation of the screw rod, whereby the auxiliary display plate rotates. Therefore, when the rotation of the screw rod is stopped, the nut portion, that is, the auxiliary display, is set within an error range of assembling the male screw formed on the outer peripheral surface of the screw rod and the female screw formed in the female screw hole of the nut portion. The movement of the plate relative to the screw rod is reliably restricted. Therefore, there is no need to provide a special stop mechanism that requires high-precision machining as in the related art, separately from the drive unit, and it is possible to reduce the number of parts, reduce product costs, and as a result, achieve robustness. There is an effect of having a structure.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of an embodiment of an auxiliary display board driving mechanism of a road information display device according to the present invention (a state where the auxiliary display board is at a standing position).

FIG. 2 is an explanatory diagram showing a configuration of an auxiliary display board driving mechanism of the road information display device of FIG. 1 (a state where the auxiliary display board is in a prone position).

FIG. 3 is an explanatory diagram showing a configuration of an auxiliary display panel and an auxiliary display panel driving mechanism in FIG. 2 as viewed from a plane.

FIG. 4 is an explanatory diagram showing a configuration of an auxiliary display panel and an auxiliary display panel driving mechanism in FIG. 1 as viewed from a plane.

FIG. 5 is an enlarged view of a main part for describing a configuration of an auxiliary display panel driving mechanism.

FIG. 6 is a front view showing a general configuration of a road information display device.

FIG. 7 is a side view of FIG. 6;

FIG. 8 is an explanatory view showing another configuration for supporting a screw rod so as to be swingable and rotatable about its axis.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Road information display apparatus 12 Auxiliary display board drive mechanism 16 Rotating shaft 20 Nut part 22 Screw rod 32 Electric motor 104 Display unit 106 Display device main body 108 Mounting surface 110 Auxiliary display board A Standing position B Face-down position C 1st axis

Claims (7)

[Claims] 1. A display device main body having a display unit for displaying road information provided on the front thereof, and a display unit which is rotatably attached to the display device main body, wherein the display unit does not perform a normal display operation. An auxiliary display plate that stands up from the mounting surface of the display device body and indicates that the display operation of the display unit is not normal; and an auxiliary display that rotates the auxiliary display plate between a standing position and a prone position with respect to the mounting surface. A road information display device comprising a plate driving mechanism, wherein the auxiliary display plate driving mechanism is separated from a rotation axis of the auxiliary display plate,
And a nut portion having a female screw hole formed along a direction orthogonal to the first axis while being rotatably mounted about a first axis parallel to the rotation axis, and the auxiliary display plate being rotated. When the female screw hole is moved, the other end is supported so that one end is swingable and rotatable about an axis, and the nut is screwed to the one end protruding from the display device body. A road information display device, comprising: a screw rod provided; and an electric motor disposed inside the display device main body and configured to rotate the other end of the screw rod. 2. The other end of the threaded rod is connected to one of a pair of joint members constituting a universal joint, and the other joint member of the pair of joint members is It is rotatably supported in a state in which the amount of movement in the thrust direction is regulated within a predetermined amount by a bearing fixed inside the display device body, and receives the rotational force of the electric motor to receive the other of the pair of joint members. 2. The road information display according to claim 1, wherein the drive shaft that rotationally drives the joint member is integrally and rotatably connected to the other joint member with a play greater than the amount of movement in the thrust direction. apparatus. 3. The axis of a pair of joint members of the universal joint and the axis of the screw rod are aligned when the auxiliary display plate is located at the upright position. Road information display device. 4. The axis of a pair of joint members of the universal joint and the axis of the screw rod are in a straight line when the auxiliary display plate is located at the prone position. 3. The road information display device according to 3. 5. The screw rod is rotatably supported in a state in which the amount of movement in the thrust direction is regulated within a predetermined amount by a bearing rotatably supported at the other end inside the display device body. Thereby, one end side is swingably supported and rotatable about an axis in the plane in which the female screw hole moves, and receives the rotational force of the electric motor to rotate the other end side of the screw rod. The drive shaft is rotatably connected to the other end of the threaded rod integrally with the other end of the screw rod with a play greater than the amount of movement in the thrust direction, and is rotatable integrally with the bearing. 1. The road information display device according to 1. 6. The road information according to claim 1, wherein the rotation position of the auxiliary display plate from the prone position is obtained by detecting a rotation speed of the electric motor. Display device. 7. A proximity sensor for providing a magnet to the auxiliary display plate and detecting a magnetic force of the magnet and outputting a signal only when the auxiliary display plate moves to the prone position inside the display device body. 7. The road information display device according to claim 1, wherein the road information display device is provided.