JP4891930B2 - 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.

  The drive device represented by Patent Document 1 has a mechanism for transmitting torque from the output shaft of the motor to the drive shaft of the passage blocker via a speed reducer and a 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 breaker, as disclosed in Patent Document 1, it is a large 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.

JP 2005-113526 A

  Therefore, the applicant of the present application has previously proposed a drive device that can be further reduced in size in Japanese Patent Application No. 2006-316043 (prior application invention). The driving device for the traffic barrier includes a worm shaft having a worm at an intermediate portion and slidably held in an axial direction, and a resilient force disposed at both ends of the worm shaft to resist the sliding. And a worm wheel that meshes with the worm, a drive shaft that rotates in accordance with the worm wheel, and a motor that rotates the worm shaft, and a passage blocking bar is connected to the drive shaft. It is characterized by being made to rotate.

  This drive device employs a worm gear that can be designed in a compact manner, and when stopping the passage blocking rod at the open or closed stop position by braking the motor, the inertia of the passage blocking rod that stops from turning is reduced to the worm gear. A structure that absorbs by the sliding force of the shaft and the elastic force of the buffer means against this is adopted, so even if it is small, it becomes a structure that can withstand the load when the passage blocking rod stops from rotating. Yes. Therefore, it becomes possible to achieve a reduction in size and weight as compared with the apparatus of Patent Document 1 and the like, and the degree of freedom of the installation position is improved.

  Furthermore, the prior invention proposes a structure in which the housing in which the worm shaft, the buffer means, the worm wheel, the drive shaft, and the motor are assembled is mounted on the pole so as to be rotatable in the horizontal direction. In the rotating mechanism according to the prior invention, the mainspring mechanism is incorporated to apply a rotational tension in the return direction to the rotating shaft so that the housing can automatically return to the normal direction after the vehicle or the like hits the passage block and rotates. .

  For the traffic barriers driven by the driving device as described above, especially when used in an ETC lane, it is necessary to consider a collision of a passing vehicle due to excessive speed, and the above-described rotational tension is used to prevent damage. A rotating mechanism with an automatic return function is essential. At this time, in the case of the invention of the prior application, the rotation tension is weak enough to rotate without damaging the vehicle (or breaker), and the rotation tension maintains the normal orientation to the extent that it does not rotate freely due to strong winds etc. You have to think about the balance of strength and strength.

  In the device of the prior invention, the normal orientation is maintained by the rotational tension in the return direction by the mainspring mechanism, and it is difficult to balance the strength of the rotational tension. In other words, if a spring with a strong tension is used to maintain the normal orientation in consideration of the wind, the rotational tension in the return direction becomes stronger, which makes it difficult to rotate and increases the return speed, affecting the prevention of breakage. Get out. In order to adjust the balance with the apparatus, it is necessary to prepare and replace a spring with a different tension, and there is room for improvement in terms of both compatibility.

  The present invention pays attention to this point, and proposes a drive device for a traffic barrier having a mechanism capable of achieving both prevention of breakage and normal maintenance ability.

  A driving device for a traffic barrier according to the proposal of the present invention includes a worm shaft having a worm at an intermediate portion and slidably held in an axial direction, and disposed at both ends of the worm shaft. A buffer means for generating a resilient force that resists sliding; a worm wheel that meshes with the worm; a drive shaft that rotates according to the worm wheel; and a motor that rotates the worm shaft. The drive device is configured to rotate by connecting a passage blocking rod to the shaft, and the housing in which the worm shaft, the buffer means, the worm wheel, the drive shaft and the motor are assembled is rotated in the horizontal direction. It has a structure that can be mounted on a pole.

  In such a traffic barrier driving device, according to the present invention, a positioning projection that engages with the positioning recess protrudes downward on a support cylinder having a positioning recess on the upper end surface and a flange formed on the upper portion. A rotation shaft that is rotatably supported in the support cylinder and a biasing means that biases the rotation shaft supported in the support cylinder downward, or A support tube having a positioning projection protruding from the end surface and a positioning recess that engages with the positioning projection are provided on the lower surface of the flange formed at the top, and is rotatably supported in the support tube. And a biasing means for biasing the rotary shaft supported in the support cylinder downward, and the rotary cylinder is inserted into and supported by the support cylinder from above. The position is determined by the urging force of the urging means. While remaining engaged with the recess and the positioning projection, proposes a structure for fixing the housing to the upper end of the rotating shaft is fixed to the support cylinder on the pole. In the drive device for the passage blocking rod, the housing can be rotated in the horizontal direction by disengaging the positioning concave portion and the positioning convex portion against the biasing force, and the biasing means is rotated by the rotation of the housing. Is characterized in that it is twisted to produce a restoring force.

  The driving device for a traffic barrier according to the above proposal employs a structure that maintains the normal direction by the engagement between the positioning concave portion and the positioning convex portion, and has a high ability to maintain the normal direction against the wind. Therefore, the rotation tension for maintaining the normal orientation is unnecessary.

  If rotation tension in the return direction applied to the rotation axis in the normal direction is unnecessary, what is necessary for starting rotation is a force that disengages the positioning concave portion and the positioning convex portion against the biasing force of the biasing means, If the shape of the concave portion and the convex portion is devised to ensure a certain degree of detachment, both the normal maintenance ability and the ease of rotation for preventing damage can be achieved.

  When the recesses and projections are disengaged and rotation starts, the biasing means is twisted and elastically deformed to generate a restoring force. Therefore, the restoring force is used as a rotational tension in the return direction, It is possible to return automatically. That is, there is provided a driving device for a traffic barrier with a mechanism that can achieve both prevention of breakage and normal maintenance ability without using a spring mechanism.

  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.

  In the case of this embodiment, a case C surrounding the housing 2 is further provided to cover the drive device 1 so as not to be directly exposed to sunlight or exhaust gas (particularly Nox). is there. 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.

  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.

  As described above, the driving device 1 of the present embodiment is disposed on the worm shaft 3 having the worm 3g in the intermediate portion 3a and held slidable in the axial direction, and the both end portions 3b and 3c of the worm shaft 3. An union disc spring 4 that is a buffer means for generating a resilient force that resists sliding of the worm shaft 3, a worm wheel 5 that meshes with the worm 3 g, a drive shaft 6 that rotates according to the worm wheel 5, and the worm shaft 3. And a motor 7 to be rotated. The drive shaft 6 is connected to a passage blocking bar 10 for rotation. The drive device 1 is a cylinder in which the housing 2 in which the worm shaft 3, the combined disc spring 4, the worm wheel 5, the drive shaft 6 and the motor 7 are assembled is rotatable in the horizontal direction as shown in FIG. It is installed so as to be mounted on the pole P.

  An example of the rotation mounting mechanism for the pole P is shown in FIGS. The rotation mounting mechanism of the present example includes a support cylinder P1 fitted and fixed in the upper part of the pole P, a rotation shaft P2 rotatably supported in the support cylinder P1, and a biasing force of the rotation shaft P2. And a coil spring P3 used as urging means.

  The support cylinder P1 is formed with an outer diameter that is fitted into the pole P, and is fitted and fixed by being inserted into the pole P from above. And the bearing members P1a and P1b which were the sliding bearings made from brass are each arrange | positioned at the upper part and the lower part of the internal peripheral surface. In addition, in the upper end surface P1c of the support cylinder P1, positioning recesses P1d are provided partially at three positions at equal intervals in this example. The positioning recess P1d is formed with an inclined surface in a direction allowing the rotation of the housing 2, and the opposite side of the inclined surface is a vertical surface so as to prevent rotation.

  The rotation shaft P2 is formed with an outer diameter supported by the bearing members P1a and P1b of the support cylinder P1, and is inserted into the support cylinder P1 so as to be rotatable. A flange P2a is formed on the top, and a positioning projection P2b projects downward from the flange P2a. The positioning convex portion P2b is formed in a shape and arrangement corresponding to the positioning concave portion P1d and engages with the concave portion P1d. In this engaged state, the housing 2 is in contact with each other on the inclined surface in the rotation-permissible direction, so that if the force sliding up the inclined surface is applied, the engagement is released, while the opposite sides are in contact with each other on the vertical surface. Therefore, the engagement is not disengaged in this direction.

  The positioning recess P1d and the positioning protrusion P2b may be formed in the reverse relationship. That is, it is also possible to project the positioning convex part on the upper end surface P1c of the support cylinder P1, and to provide the positioning concave part on the lower surface of the flange P2a of the rotating shaft P2.

  A coil spring P3 constituting urging means for urging the rotating shaft P2 supported in the support cylinder P1 downward is disposed inside the hollow rotating shaft P2. The coil spring P3 in this example is a tension spring, one end of which is engaged with the upper portion of the rotating shaft P2, and the other end is engaged with the lower portion of the support cylinder P1. Specifically, an upper bolt P3a is projected into the rotation shaft P2 from the upper end surface portion P2c of the rotation shaft P2 (a lid member that closes the opening at the upper end), and one end of the coil spring P3 is locked to the suspended upper bolt P3a. is doing. On the other hand, the lower bolt P3b protrudes also into the rotating shaft P2 from the lower end surface portion P1e of the support cylinder P1 (the lid member closing the opening at the lower end), and the other end of the coil spring P3 is locked to the raised lower bolt P3b. is doing.

  By adjusting the protrusion amount of these bolts P3a and P3b, the coil spring P3 can be expanded and contracted, and the urging force thereof can be adjusted. In this example, the upper bolt P3a is covered with the mounting base of the housing 2, Since it is hidden after the assembly of the apparatus, the fixed side is formed by cutting a female screw into the upper end surface part P2c and screwing it. On the other hand, the lower bolt P3b is assembled as an adjustment side that can adjust the protruding amount from the lower end surface portion P1e, and the biasing force of the coil spring P3 can be adjusted by adjusting the protruding amount. That is, the lower bolt P3b passes through the lower end surface portion P1e through an insertion hole provided in the lower end surface portion P1e, and adjusts the amount of protrusion from the lower end surface portion P1a to the inside by screwing and tightening the nut P3c from the outside. It can be done. By adjusting the protrusion amount, the coil spring P3 can be maintained in a properly extended state. That is, the pressing force of the flange P2a of the rotating shaft P2 against the upper end surface P1c of the support cylinder P1, in other words, the disengagement force between the positioning recess P1d and the positioning protrusion P2b can be adjusted. Depending on the structure of the housing 2, the upper bolt P3a can be used as the adjustment side.

  The support cylinder P1 and the rotation shaft P2 as described above are supported by inserting the rotation shaft P2 from above into the support cylinder P1, and upper and lower end surface portions (lid members) p1e and P2c, bolts P3a and P3b, coil springs P3, and nuts. P3c is assembled, and the supporting cylinder P1 is fixed to the pole P and the housing 2 is fixed to the upper end of the rotating shaft P2 in a state where the positioning recess P1d and the positioning protrusion P2b are engaged by the urging force of the coil spring P3. To use. Thus, when the positioning recessed part P1d and the positioning convex part P2b are engaging, it becomes the normal direction of the housing 2 (FIG.3 and FIG.5).

  After the assembly with the pole P and the housing 2, the urging force of the coil spring P3 is adjusted by the nut P3c so that the housing 2 does not rotate horizontally due to the wind pressure. Since the structure in which the normal direction is maintained by the engagement between the positioning concave portion P1d and the positioning convex portion P2b is adopted, the urging force of the coil spring P3 presses the flange P2a of the rotating shaft P2 against the upper end surface P1c of the support cylinder P1. There is no need for rotational tension by a spring mechanism or the like for maintaining the normal orientation. Since the rotational tension in the return direction is not substantially applied to the rotation axis P2 in the normal direction, the force required to start the rotation is the force that disengages the positioning concave portion P1d and the positioning convex portion P2b against the biasing force of the coil spring P3. is there. Since the concave portion P1d and the convex portion P2b are provided with inclined surfaces in the rotation-permitting direction as described above, it can withstand wind pressure by an easy operation of appropriately adjusting the urging force of the coil spring P3 by the nut P3c. However, it is possible to achieve both the ability to maintain normal orientation and the ease of rotation to prevent damage so that the vehicle can easily rotate in response to an impact such as collision of a passing vehicle.

  When the passing vehicle collides with the passage blocking bar 10, the housing 2 rotates in the horizontal direction by disengaging the positioning recess P1d and the positioning protrusion P2b against the biasing force of the coil spring P3 (FIG. 6). When the coil spring P3 is twisted and elastically deformed by the rotation of the housing 2, a restoring force for returning the twist is generated. The restoring force of the coil spring P3 acts on the rotating shaft P2 as a rotational tension in a direction to return to the normal direction, and the housing 2 is automatically returned to the normal direction in which the positioning concave portion P1d and the positioning convex portion P2b are engaged. Can do.

  The support cylinder P1 of this example has a flange having a predetermined thickness at the upper end portion, and the flange abuts on the upper end edge of the pole P so that the support cylinder P1 does not fit any further. As shown in FIG. 7, a plurality of attachment / detachment ports P <b> 1 f can be formed on the outer peripheral surface of the flange of the support cylinder P <b> 1 in the circumferential direction. Each attachment / detachment opening P1f is internally threaded, and the stopper pin P1g can be screwed with a hexagon wrench. On the other hand, the stopper rod 2a is fixed to the housing 2 and is suspended from the lower surface, and rotates together with the housing 2 along the outer peripheral surface of the flange of the support cylinder P1. Therefore, if the stopper pin P1g is attached to one of the attachment / detachment ports P1f, the rotation of the housing 2 stops when the stopper rod 2a comes into contact with the stopper pin P1f. The rotation angle of the housing 2 can be regulated as appropriate by changing the attachment / detachment opening P1f to which the stopper pin P1f is attached. The stopper rod 2a may be fixed to the outer peripheral surface of the flange P2a on the rotating shaft P2 and hang down.

  As shown in FIGS. 8 to 10, 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 the internal structural example of the drive device which concerns on this invention. Sectional drawing of the drive device seen in the AA line cross section in FIG. Sectional drawing explaining the rotation mechanism which attaches a drive device on a pole rotatably. FIG. 4 is an exploded perspective view of a support cylinder and a rotation shaft according to the rotation mechanism of FIG. 3. The perspective view of the support cylinder shown in the state which the positioning recessed part and the convex part engaged, and a rotating shaft. The perspective view of the support cylinder and rotating shaft shown in the state which the engagement of the positioning recessed part and the convex part released | deviated. The principal part perspective view which showed the attachment / detachment opening formed in the support cylinder, the stopper pin attached to this, and the stopper rod contact | abutted to this stopper pin. The front side perspective view of the traffic barrier which incorporated the drive device which concerns on this invention. The back side partial perspective view of the traffic barrier of FIG. FIG. 9 is a cross-sectional view of the traffic barrier shown in the cross-section along the line BB in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drive device 2 Housing 2a Stopper rod 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 7 Motor 7a Output shaft 7b Timing belt 10 Passage blocking rod 11 Base end portion 12 Fixing tool 13 Cylindrical body 14 Rubber sheath 15 Light emitting tube 16, 17 Flash light P Pole P1 Support tube P1a, P1b Bearing member P1c Upper end surface P1d Positioning convex portion P1e Lower end surface portion (lid member)
P1f Removable port P1g Stopper pin P2 Rotating shaft P2a Flange P2b Positioning recess P2c Upper end surface (lid member)
P3 Energizing means (coil spring)
P3a Upper bolt P3b Lower bolt P3c Nut

Claims (6)

A worm shaft having a worm at an intermediate portion and held so as to be slidable in the axial direction; and 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 that meshes with the worm, a drive shaft that rotates in accordance with the worm wheel, and a motor that rotates the worm shaft, and is connected to the drive shaft so as to be rotated. And
A drive device for a traffic barrier that attaches the worm shaft, the buffering means, the worm wheel, the drive shaft and the housing in which the motor is assembled to the pole so as to be rotatable in the horizontal direction,
A support cylinder provided with a positioning recess on the upper end surface;
A positioning projection that engages with the positioning recess is protruded downward on a flange formed on the upper portion, and a rotation shaft that is rotatably supported in the support cylinder;
An urging means for urging the rotating shaft supported in the support cylinder downward;
Comprising
The rotating shaft is inserted into and supported by the supporting cylinder from above, and the supporting cylinder is fixed to the pole in a state where the positioning recess and the positioning protrusion are engaged by the biasing force of the biasing means. And the housing is fixed to the upper end of the rotating shaft,
The housing can be rotated in the horizontal direction by disengaging the positioning concave portion and the positioning convex portion against the biasing force,
A drive device for a traffic barrier, wherein the biasing means is twisted by rotation of the housing to generate a restoring force. A worm shaft having a worm at an intermediate portion and held so as to be slidable in the axial direction; and 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 that meshes with the worm, a drive shaft that rotates in accordance with the worm wheel, and a motor that rotates the worm shaft, and is connected to the drive shaft so as to be rotated. And
A drive device for a traffic barrier that attaches the worm shaft, the buffering means, the worm wheel, the drive shaft and the housing in which the motor is assembled to the pole so as to be rotatable in the horizontal direction,
A support cylinder having a positioning protrusion protruding from the upper end surface;
A positioning recess that engages with the positioning projection is provided on the lower surface of the flange formed on the upper portion, and a rotation shaft that is rotatably supported in the support cylinder;
An urging means for urging the rotating shaft supported in the support cylinder downward;
Comprising
The rotating shaft is inserted into and supported by the supporting cylinder from above, and the supporting cylinder is fixed to the pole in a state where the positioning convex part and the positioning concave part are engaged by the biasing force of the biasing means. And the housing is fixed to the upper end of the rotating shaft,
The housing can be rotated in the horizontal direction by disengaging the positioning convex portion and the positioning concave portion against the biasing force.
A drive device for a traffic barrier, wherein the biasing means is twisted by rotation of the housing to generate a restoring force. A plurality of stopper pin attachment / detachment openings are arranged in the circumferential direction on the outer peripheral surface of the support cylinder,
A stopper rod suspended from a flange of the housing or the rotating shaft is brought into contact with the stopper pin attached to any one of the attachment / detachment openings, whereby the rotation of the housing is stopped. The drive device for a traffic barrier according to claim 1 or 2. The biasing means includes a coil spring disposed in the rotating shaft that is hollow,
The one end of this coil spring is latched to the upper part of the said rotating shaft, and the other end is latched to the lower part of the said support cylinder, The passage blocker of any one of Claims 1-3 characterized by the above-mentioned. Drive device. One end of the coil spring is engaged with a bolt protruding into the rotary shaft from the upper end surface of the rotary shaft,
5. The driving device for a traffic barrier according to claim 4, wherein the biasing force of the coil spring can be adjusted by adjusting the protruding amount of the bolt. The other end of the coil spring is locked to a bolt protruding from the lower end surface portion of the support cylinder into the rotation shaft,
5. The driving device for a traffic barrier according to claim 4, wherein the biasing force of the coil spring can be adjusted by adjusting the protruding amount of the bolt.

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