JP4749999B2 - Driving device for traffic barrier - Google Patents

Description

  The present invention relates to a traffic barrier that blocks traffic such as a vehicle, and more particularly to a drive device for a traffic barrier in a traffic barrier that is opened and closed by rotating a traffic barrier in a vertical direction.

Traffic barriers (traffic gates) that open and close by rotating the traffic barriers by 90 ° in the vertical direction (vertical direction) with respect to the ground are installed at the entrances to parking lots and recently at the ETC lanes of toll road toll gates. There is a lot to be done. As shown in Patent Document 1, such a traffic barrier has a structure in which a drive device that rotates a traffic barrier is housed in a box-shaped case standing on the ground.
JP 2005-113526 A

  As disclosed in Patent Document 1, the conventional drive device has a mechanism for transmitting torque from the output shaft of the motor to the drive shaft of the passage blocker via the speed reducer and the link mechanism. This is a configuration that is necessary to obtain the driving force necessary to rotate and stop the passage blocking rod, but since the passage blocking rod is a cantilever structure with a drive shaft connected to the end, In particular, it is difficult to reduce the size because the load when stopping from turning is large and it is necessary to withstand this. Therefore, as a conventional product of a traffic blocker, there is only a large-sized one in which a case of the height of an elementary school student is raised from the ground in order to store the drive device as in Patent Document 1.

  The present invention has been devised in view of this, and proposes a structure capable of further reducing the size of a drive device for a traffic barrier.

The drive device for a traffic barrier according to the present invention includes a worm shaft having a worm at an intermediate portion and slidably held in the axial direction, and an elastic member disposed at both ends of the worm shaft to resist the sliding. A buffering means for generating force, a worm wheel meshing with the worm, a drive shaft formed by extending a rotation shaft of the worm wheel, and a motor for rotating the worm shaft, When the drive shaft is connected to the drive shaft and rotated, and when the motor is energized to rotate the traffic block, the brake is applied by the motor to stop the worm. The shock absorbing means absorbs a force acting through the worm wheel to slide the worm shaft due to the inertia of the passage blocking rod .

  According to the drive device of the present invention, when the worm gear that can be designed in a compact manner is employed and the passage blocking bar is stopped at the open or closed stop position by braking the motor, the passage blocking bar that stops from turning is used. A structure that absorbs inertia by sliding of the worm shaft and the elastic force of the buffer means against this is adopted, so even if it is small, it can withstand the load when the passage blocker stops from rotating It has a structure. Therefore, it is possible to reduce the size and weight as compared with the conventional case, and the degree of freedom of the installation position is improved.

  A preferred embodiment of a traffic barrier and its driving device will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, the drive device 1 of the present embodiment is configured by assembling a worm shaft 3, a buffer means 4, a worm wheel 5, a drive shaft 6, and a motor 7 to an iron housing 2. Yes.

  The worm shaft 3 has an intermediate portion 3a and both end portions 3b and 3c having a smaller diameter, and the both end portions 3b and 3c are held in the bearings 3d and 3e of the ball bearing so as to be axial (arrow X direction). And is housed in the housing 2. One end 3b passes through the bearing 3d and protrudes to the opposite side, and is provided with a pulley 3f at the tip. The pulley 3f is driven by a timing belt 7b wound around the output shaft 7a of the motor 7. As a result, the worm shaft 3 rotates. In the case of this embodiment, a hexagonal hole 3b ′ is recessed in the tip surface of the end 3b, and a handle having a hexagon wrench that fits in the hexagonal hole 3b ′ can be manually operated in an emergency. The worm shaft 3 can also be rotated.

  The spiral worm 3g is formed at the intermediate portion 3a of the worm shaft 3, and step portions 3h and 3i are formed at the boundary portion between the intermediate portion 3a and both end portions 3b and 3c. Between the stepped portions 3h and 3i and the bearings 3d and 3e, a combination disc spring 4 formed by combining four disc springs is sandwiched as buffer means.

  Since the combination disc spring 4 is loosely inserted into the end portions 3b and 3c and is regulated by contacting the step portions 3h and 3i and the bearings 3d and 3e, it resists this when the worm shaft 3 slides in the axial direction. Generates an elastic force. As such a buffer means, a rubber washer, a coil spring or the like can be used. However, since the elastic force is relatively strong and the elastic force is easy to adjust, the combined disc spring 4 is used. Is suitable.

  The worm wheel 5 that meshes with the worm 3g of the worm shaft 3 is formed as small as possible within a range necessary for the rotation angle of the passage blocking bar 10 of approximately 90 °, and is formed in an arc of about 120 °. And the rotating shaft 5a of the said worm wheel 5 is extended, it protrudes from the housing 2, and the drive shaft 6 which connects the traffic barrier 10 is formed. A fitting 12 holding the base end portion 11 of the passage blocking bar 10 is fitted to the drive shaft 6 having a square cross section.

  In this embodiment, the motor 7 that rotates the worm shaft 3 is a DC motor that easily obtains a high output, and is rotated and braked by a drive circuit 7 c built in the housing 2. In addition, a battery 7d is built in the housing 2, and is driven by the battery 7d in an emergency by semiconductor circuit control. An AC motor can also be used as the motor 7. In this case, a drive circuit and the like necessary for the DC motor can be omitted and a low-priced product can be obtained.

  In the drive device 1 having the above-described configuration, when the passage blocking rod 10 in the closed stop position (the recumbent state) is turned by energizing the motor 7 and stopped at the open stop position (upright state), or On the contrary, when switching from opening to closing, the motor 7 applies braking to stop. When the worm 3g suddenly stops due to braking of the motor 7, the worm wheel 5 receives the inertia of the passage blocking rod 10 which stops from the rotation through the drive shaft 6, so that the worm shaft 3 is slid by the inertia force. The power to do works. With respect to this inertia, the combination disc spring 4 provided at both end portions 3b and 3c of the worm shaft 3 generates and absorbs a resilient force, so that it can withstand a load when the passage blocking rod 10 stops from rotating. It has become. Therefore, in combination with the adoption of a worm gear capable of a compact design, it becomes possible to reduce the size and weight as compared with the prior art, and the degree of freedom in the position of installing the breaker is improved.

  Further, by adopting the worm gear structure of the configuration, it is a structure that cannot be rotated by hand with the passage blocking bar 10 substantially. In the case of a conventional product, for example, in a parking lot entrance / exit breaker, a mechanism that catches and locks the front end side of the traffic barrier fence at the closed stop position so that the traffic barrier fence cannot be raised by hand. (So-called catcher) is often provided. This is because the conventional product can be lifted by hand with a traffic barrier, but this is not necessary in the driving device 1 of the present embodiment.

  The drive shaft 6 in the present embodiment is provided with a projecting piece 6a protruding in a direction perpendicular to the axial direction so as to rotate together (FIG. 3). On the other hand, urging means 6b and 6c are provided on the outer surface of the housing 2 so as to be pressed by the projecting piece 6a when the passage blocking bar 10 is in the open and closed stop positions. The urging means 6b and 6c are formed by accommodating coil springs 6d and 6e in a cylinder fixed to the housing 2 and covering them with plungers 6f and 6g. When the plungers 6f and 6g are pushed by the projecting pieces 6a, The springs 6d and 6e are compressed to generate a biasing force. By providing the urging means 6b and 6c, the drive shaft 6 is urged in the rotational direction when the passage blocking bar 10 is in the stop position, and in particular, the passage blocking bar 10 is rotated from the closed stop position. It helps to reduce the load when starting to move. Further, it can also serve as a buffer assist when the traffic barrier 10 stops from turning.

  The housing 2 in which the worm shaft 3, the buffer means 4, the worm wheel 5, the drive shaft 6 and the motor 7 are assembled is rotatably mounted on the pole P (FIGS. 4 and 5). That is, the horizontal rotation shaft 2a is fixed to the housing 2, and the horizontal rotation shaft 2a is pivotally supported by a bearing member P1 provided at the upper end portion of the pole P. The bearing member P1 has a large-diameter bearing P2 and a small-diameter bearing P3 arranged one above the other so as to support a horizontal rotating shaft 2a having a step shape corresponding to the large-diameter bearing P2 and a small-diameter bearing P3. In the middle, rotation stop pins P4 and P5 are projected at two locations. The rotation stop piece 2b provided on the horizontal rotation shaft 2a is brought into contact with the rotation stop pins P4 and P5, so that the housing 2 is rotated within a range of about 90 °. As a result, when the vehicle comes into contact with the traffic barrier 10 at the closed stop position, the traffic barrier 10 rotates together with the housing 2 to prevent damage. A positioning notch 2c is formed on one side of the rotation stop piece 2b so that the normal orientation of the housing 2 can be positioned.

  Further, a spring mechanism P6 is incorporated in the lower end portion of the bearing member P1, and the outermost end portion thereof is connected to the bearing member P1 and the innermost end portion is connected to the horizontal rotating shaft 2a. As a result, the horizontal rotation shaft 2a is always tensioned in the direction in which the rotation stop piece 2b abuts against the rotation stop pin P4 (that is, in a normal direction), and the vehicle or the like has rotated against the traffic barrier 10. The housing 2 can be automatically returned to the normal direction later.

  In the case of the present embodiment, a case C surrounding the housing 2 is further provided so that the drive device 1 is not directly exposed to sunlight or exhaust gas (particularly Nox). It is covered. The case C is made of stainless steel whose outer peripheral surface is coated, and suppresses a rise in temperature of the housing 2 by preventing direct sunlight, and suppresses rust of the housing 2 by preventing exhaust gas.

  As shown in FIGS. 6 to 8, the traffic barrier 10 in the present embodiment wraps the cylindrical main body 13 made of glass fiber-containing resin having an oval cross section (land track shape). And a rubber cover 14 having a predetermined thickness. The cylindrical main body 13 made of a glass fiber-containing resin and having an oval cross section is light in combination with being hollow and is wrapped in a rubber covering 14 having a predetermined thickness to improve the strength. The base end portion 11 can be directly connected to the drive shaft 6 via the fixture 12. That is, the shaft load can be reduced as compared with the prior art interrupting rod attached to the drive device with an iron pipe or the like interposed therebetween, the load applied to the drive shaft 6 can be reduced, and the drive device 1 can be reduced in size. Contribute to

  In addition, since the cylindrical body 13 is wrapped with a natural or synthetic rubber covering 14 having a predetermined thickness (preferably a thickness of about 2 mm because it becomes heavy when it is too thick), the vehicle collides with the cylinder. Even when the main body 13 is damaged, the rubber cover 14 prevents scattering. As a result, secondary disasters caused by scattered broken pieces can be prevented, and replacement work can be facilitated.

  A light-emitting tube 15 with a built-in LED is stretched around the upper and lower sides of such a traffic barrier 10 and the light-emitting tube 15 shines when energized to improve visibility. Further, two high-intensity flashlights 16 and 17 are installed on the side surface of the cylindrical main body 13 on the vehicle entry side to further enhance the visibility. The wiring of the flashlights 16 and 17 passes through the inside of the cylindrical main body 13 and is devised so as not to break as much as possible.

Sectional drawing which showed embodiment of the drive device which concerns on this invention. Sectional drawing of the drive device seen in the AA line cross section in FIG. The drive shaft side side view of the drive device explaining a biasing means. Sectional drawing explaining the rotation mechanism which attaches a drive device on a pole rotatably. Sectional drawing which shows the rotation mechanism of FIG. 4 seeing from the top. The back side perspective view of the traffic barrier which incorporated the drive device concerning the present invention. The front side perspective view of the traffic barrier of FIG. Sectional drawing of the traffic barrier shown in the BB line cross section in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drive device 2 Housing 2a Horizontal rotating shaft 2b Rotation stop piece 2c Positioning notch 3 Worm shaft 3a Intermediate | middle part 3b, c End part (small diameter part)
3d, e Bearing 3f Pulley 3g Worm 3h, 3i Step 4 Buffering means (combination disc spring)
5 Worm wheel 5a Rotating shaft 6 Drive shaft 6a Protruding piece 6b, c Energizing means 6e, d Coil spring 6f, g Plunger 7 Motor 7a Output shaft 7b Timing belt 10 Passage blocking rod 11 Base end portion 12 Mounting tool 13 Tubular body 14 Rubber sheath 15 Luminescent tube 16, 17 Flashlight P Pole P1 Bearing member P2 Large diameter bearing P3 Small diameter bearing P4, 5 Rotation stop pin

Claims (5)

A worm shaft having a worm in the middle and held slidable in the axial direction;
A buffer means disposed at both ends of the worm shaft to generate a resilient force that resists sliding of the worm shaft;
A worm wheel meshing with the worm;
A drive shaft formed by extending the rotation shaft of the worm wheel;
A motor for rotating the worm shaft;
Comprising
The drive shaft is adapted to rotate by connecting a traffic barrier to the drive shaft ,
The worm shaft that works via the worm wheel due to the inertia of the passage blocking rod when the worm is stopped by applying a brake by the motor after energizing the motor to rotate the passage blocking rod. A driving device for a traffic barrier , wherein the buffer means absorbs a force to slide the vehicle. The drive device according to claim 1, wherein the worm wheel is formed in a 120 ° arc. The drive device according to claim 1, wherein a hole for fitting a wrench is provided in a distal end surface of one end portion of the worm shaft. The worm shaft has a small diameter at both ends with respect to the diameter of the intermediate portion, a step portion is formed at a boundary portion between the intermediate portion and both ends, and the both ends are held by a bearing,
The said buffer means is an union disc spring which consists of a plurality of disc springs passed through the both end portions of the worm shaft and sandwiched between the step portion and the bearing . The drive device of any one of Claims . The drive shaft is provided with a projecting piece projecting in a direction orthogonal to the axial direction,
Wherein by being pressed by the passage blocking rod of the protrusion at the stop position, further seen including biasing means for biasing the drive shaft to the rotating direction when in the traffic blocking rod stop position,
The biasing means is formed by accommodating a coil spring in a cylinder and covering with a plunger, and the projecting piece pushes the plunger to compress the coil spring to generate a biasing force. The drive device of any one of Claims 1-4 .

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