JP4465428B2 - Road sign pillar and manufacturing method thereof - Google Patents

Description

  The present invention includes an elastically deformable central column in which a highly visible member such as a reflecting portion is disposed on the outer surface, and a base unit provided at a lower portion of the central column and erected. It mainly relates to road sign pillars installed on roads.

  The road sign pillar is used for marking the center separation line of the upper and lower roads, the boundary line between the roadway and the sidewalk, and markings such as park stop partitions such as parks and streets. For this reason, when the sign post is formed of a material having a large rigidity, there is a risk that the sign post may be damaged by the impact or fragments may be scattered when the automobile collides. In addition, there is a risk that the driver will be harmed by the car. Furthermore, when a person hits the sign post, there is a possibility of harming the person.

  A marker column that solves such a problem and is configured to bend greatly by collision is known (Patent Documents 1 and 2). The marker column disclosed in Patent Document 1 is composed of an inner layer body in which a coil spring is joined on a metal pipe and an elastomer that covers the outer side of the inner layer body. The sign post is installed on the ground by embedding the lower part of the metal pipe in the ground, the upper part has a soft and soft contact feeling, and the middle part is composed of a coil spring and an elastomer. It has a bend restoring property unique to the composite. Therefore, it bends as soon as it receives an external force, but is formed so that the initial shape can be maintained over a long period of time.

  The road sign pillar disclosed in Patent Document 2 aims to solve the problem that the sign pillar disclosed in Patent Document 1 uses a coil spring and thus has a large rebound resilience so that an emergency vehicle cannot be overcome. The outer support column is provided with an elastically deformable outer support column provided with a reflecting portion on the outer surface, and a base provided at the lower part of the outer support column, and the outer support column is formed in a hollow space in the hollow region. The visual guidance sign column is provided with an elastically deformable inner column extending upward from the base side.

No. 6-45450 (utility model registration request, Fig. 1 etc.) JP 2004-250997 A

  The line-of-sight sign column, which is a road sign column disclosed in Patent Document 2, integrates an external column, an internal column, and an anchor bolt for fixing the ground by casting a liquid reactive curable resin material and curing it. It is manufactured by forming the base portion, and the production efficiency is poor, the manufacturing takes time and the cost is high.

  The present invention has been made in view of the above-mentioned problems of the known technology, and it is an object of the present invention to provide a road sign pillar that can be overridden by a vehicle and that can be manufactured efficiently and at low cost in a short time, and a manufacturing method thereof. To do.

The road sign pillar of the present invention is erected on the base part made of thermoplastic resin, the central pillar made of thermoplastic elastomer standing on the base part, and the lower outer periphery of the central pillar of the base part It consists of a reinforcement part made of thermoplastic elastomer,
The base portion is composed of a central member having a central pillar mounting portion at an upper portion and an annular member fixed to the central member,
The central column is externally fitted to the central column mounting portion at the end, and a tightening member is attached to the outer peripheral surface of the external fitting portion of the central column to the central column mounting portion.
An end portion of the reinforcing portion has a locking rib, and the reinforcing member is sandwiched and fixed by the locking rib by the center member and the annular member.

  Such a road sign post can be used over the vehicle in the same manner as the sign post of Patent Document 2. In addition, the base part is not molded by casting a reactive curable resin material, but is molded from a thermoplastic resin, and can be manufactured simply by assembling the molded parts. It is a road sign pillar that can be manufactured at low cost.

  In the above-mentioned road sign pillar, the central pillar mounting portion has a ridge in the circumferential direction of the outer peripheral surface, and the fastening member is mounted and fixed to the end of the central pillar from the ridge. preferable.

  With such a configuration, when a heavy road vehicle such as a truck passes over and passes through a road sign post, undergoes deformation that causes the central post to be crushed near the base, and is subjected to pulling stress associated with the deformation However, the central pillar is prevented from falling off.

The manufacturing method of the road marking pillar of the present invention includes a base part manufacturing process for manufacturing a base part with a thermoplastic resin, a central column manufacturing process for manufacturing a central pillar with a thermoplastic elastomer, and a reinforcing part with a thermoplastic elastomer. And a reinforcing part manufacturing process for manufacturing and an assembling process for standing the central pillar and the reinforcing part on the base part,
The base portion is composed of a central member having a central pillar mounting portion at an upper portion and an annular member that can be fixed to the central member,
A locking rib is formed at the end of the reinforcing part,
In the assembling step, an end of the central column is externally fitted to the central column mounting portion of the central member, and the outer peripheral surface of the outer fitting portion of the central column to the central column mounting portion is tightened by a tightening member. A column fixing step and a reinforcing portion fixing step of supplying the reinforcing portion to a lower outer periphery of the central column and clamping the locking rib between the central member and the annular member.

  According to the manufacturing method of such a configuration, since the base portion is not molded by casting the reaction curable resin raw material, it can be manufactured simply by molding with a thermoplastic resin and assembling the molded members. Road sign pillars can be manufactured in a short time, efficiently and at low cost. Further, the obtained road sign pillar can be used over the vehicle in the same manner as the sign pillar of Patent Document 2.

  In the road sign pillar manufacturing method described above, the central pillar mounting portion has a ridge in the circumferential direction of the outer peripheral surface, and in the central pillar fixing step, the fastening member is disposed on the end side from the ridge. It is preferable that the diameter is reduced.

  By the manufacturing method of such a configuration, a heavy vehicle such as a truck passes by stepping on a road sign pillar, and the central pillar is subjected to deformation such that the central pillar is crushed near the base, and the pulling stress accompanying the deformation is received. Even in this case, it is possible to manufacture a road sign pillar in which the central pillar is effectively prevented from falling off.

  As the thermoplastic elastomer (TPE) constituting the central pillar and the reinforcing portion of the road sign pillar of the present invention, a known thermoplastic elastomer can be used without any particular limitation. Specifically, polyester TPE, polyurethane TPE (TPU), polyolefin TPE (TPO), polystyrene TPE (TPS), polyamide TPE (TPAE), ionomer TPE, diene TPE, polyvinyl chloride TPE ( TPVC), polyvinyl chloride / polyurethane polymer alloy TPE, a mixture of thermoplastic resin and rubber, and the like. A thermoplastic elastomer in which rubber is mixed or finely dispersed in these thermoplastic elastomers can also be used. These TPEs can be used alone, and two or more of them may be mixed and used as necessary.

  The thermoplastic elastomer preferably has a hardness of 90 or less in terms of JIS-A hardness, and more preferably 85 or less. If the hardness is too high, damage may occur due to repeated bending. The hardness of the thermoplastic elastomer is usually 50 or more in terms of JIS-A hardness.

  The thermoplastic elastomer constituting the central column and the reinforcing portion may be the same or different materials. Among the thermoplastic elastomers described above, the use of polyurethane-based TPE is particularly preferable because of its excellent durability.

  As the thermoplastic resin constituting the base portion of the road sign pillar of the present invention, a known thermoplastic resin can be used without limitation. Specifically, PET, PBT, polypropylene terephthalate, polyalkylene terephthalate resin such as polyester of 1,4-cyclohexanedimethanol and terephthalic acid, polyethylene naphthalate, polypropylene naphthalate, 1,4-cyclohexanedimethanol and naphthalenedicarboxylic acid Examples include polyalkylene naphthalate resins such as polyesters, polycarbonate resins, polyphenylene oxide, polyphenylene sulfide, polyurethane resins, fluorine resins such as PFA, ABS resins, and blend resins, polymer alloys, etc. selected from these resins. Is done.

  FIG. 1 is a perspective view illustrating a preferred embodiment of a road sign post of the present invention. The road sign pillar 10 is composed of a cylindrical central pillar 12 whose top is sealed with a cap, a reinforcing part 14 disposed on the outer periphery of the lower part of the central pillar 12, and a base part 20 having a substantially truncated cone shape. The central column 12 and the reinforcing portion 14 are erected at the central portion of the base portion 20. The reinforcing portion 14 has an action of reinforcing the central pillar 12 and preventing the damage thereof when the road sign pillar undergoes deformation that is crushed by getting over the vehicle. A plurality of reflection sheets 34 are wound and mounted on the upper part of the central pillar 12, and a plurality of disk-like reflection members (reflectors) are also mounted around the side surface of the base portion 20, Increases visibility at night. The cross-sectional shape of the central column 12 is not particularly limited, but is preferably cylindrical from the viewpoint of visibility from all directions and manufacturing simplicity.

  FIG. 2 is a vertical side view of the lower part of the road sign pillar illustrated in FIG. 1, and shows a state in which the central pillar 12 and the reinforcing part 14 are assembled to the base part 20. The lower part of the central column 12 is a cylinder, and the reinforcing part 14 has an upper cylindrical shape that is substantially the same as the outer periphery of the central column 12, a lower part that is tapered, and a locking rib 15 formed at the end. Has been. It is preferable that a configuration is obtained so that rainwater and dust are difficult to enter between the central column 12 and the reinforcing portion 14. A plurality of vertical stripe ribs 41 are formed inside the tapered portion at the lower portion of the reinforcing portion 14, and the vertical stripe ribs provide a road sign post excellent in resilience after being stepped on the vehicle. The vertical ribs 41 preferably have an average width of 2 to 20 mm. The base portion 20 includes a central member 18 and an annular member 16, and is formed by fitting the central member 18 and the annular member 16 and fixing and integrating them with a plurality of bolts 30. . The center column 12 has an outer diameter of 5 to 15 cm, a wall thickness of 2 to 10 mm, more preferably 3 to 8 mm, and a length of preferably 50 cm to 1.5 m. The annular member 16 has a thickness of 2 to 10 mm, more preferably 3 to 8 mm, and a height of 20 to 50 cm.

  The center member 18 has a columnar center column mounting portion 21 that is fitted to the lower end portion of the center column 12 on the upper side opposite to the installation surface, and an annular groove 33 that receives the lower end of the center column 12 and the reinforcing portion 14. A locking rib abutting portion 34 that abuts against the locking rib 15 formed at the end of the door, and a bolt hole 26 for mounting an anchor bolt for fixing the road sign post 10 to a road surface or the like. Further, a ridge 24 is formed in the circumferential direction in the vicinity of the upper end portion of the central column attachment portion 21.

  The annular member 16 constituting the base portion 20 has a through hole having substantially the same shape as the lower outer peripheral surface of the reinforcing portion 14 at the center, and a locking rib contact portion 37 that contacts the locking rib 15 of the reinforcing portion 14. And a fixing nut portion 29 of a locking bolt for fixing the center member 18 to each other.

  The lower end portion of the central column 12 is fitted to the central column mounting portion 21 of the central member so as to get over the protruding strip 24 and reach the bottom of the annular groove 33, and further to the end side from the protruding strip 24 of the lower end portion of the central column 12. The fastening member 22 is fastened and fixed.

  The reinforcing portion 14 is disposed on the lower outer peripheral surface of the central pillar 12, and the engaging rib 15 is formed on the central pillar attaching portion 21 and the engaging rib abutment portion 34 formed on the annular member 16. It is clamped and fixed by the contact portion 37.

  In the road sign pillar of the present invention, as shown in FIG. 2, it is preferable that an internal support 43 is disposed inside the center pillar 12. If the central pillar 12 is long and bent when the vehicle is stepped on, the weight of the upper part may be large and the original shape may not be restored. It has the effect | action which ensures. When the length of the central column 12 is 70 cm or more, it is preferable to dispose the internal support column 43. It is preferable that the internal support | pillar 43 is cylindrical like a center pillar, and length is 30-75 cm. Although it is preferable that the lower end of the internal column 43 is fixed to the base portion, it may not be fixed.

  The road sign pillar of the present invention is a base part manufacturing process in which a base part is manufactured with a thermoplastic resin, a central column manufacturing process in which a central column is manufactured with a thermoplastic elastomer, and a reinforcing part is manufactured with a thermoplastic elastomer. Manufactured by a manufacturing method including a reinforcing part manufacturing process and an assembling process in which the central column and the reinforcing part are erected on the base part. The central column 12 is preferably manufactured by extruding into a continuous tube shape by extrusion molding of a thermoplastic elastomer and then cutting it to a predetermined length. The reinforcing portion 14 is preferably manufactured by injection molding of a thermoplastic elastomer. Moreover, it is preferable that the base part is manufactured by injection molding of a thermoplastic resin for both the center member 18 and the annular member 16. By assembling members obtained by such a manufacturing method, a road sign post can be manufactured more easily and at a lower cost than casting a reaction curable composition as in the case of a sign post described in Patent Document 2. can do.

  FIG. 3 is a cross-sectional view showing the central column fixing step in the assembling step after each member is manufactured. The lower end portion of the central column is fitted to the central column mounting portion 21 formed on the central member 18 which is a constituent member of the base portion. In the vicinity of the upper end portion of the central column mounting portion 21, a ridge 24 having a tapered shape on the upper side in the circumferential direction is formed. The central column 12 uses the flexibility to overcome the ridge 24. Push down to the bottom of the annular groove 33 to fit. Next, the outer periphery of the central column is fastened and fixed on the end side from the ridge 24 by the fastening member 22. A known member can be used as the tightening member, but it is preferable to fix it by caulking and reducing the diameter after fitting a metal ring because simple and strong fixing can be performed. The cross-sectional shape of the ridges 24 is not particularly limited, but is preferably a shape that is easy to fit by pushing the center column and is not easily pulled out by tensile stress as described above. Further, the position of the ridge 24 is not particularly limited as long as it is in the vicinity of the upper end portion of the central column attachment portion 21. Moreover, it is preferable that the upper end of the center column attaching portion 21 and the upper end of the annular member 16 have a chamfered shape for preventing damage when the center column 12 and the reinforcing portion 14 are bent.

  FIG. 4 is a sectional view showing the reinforcing portion fixing step. After the fixing step of the center column 12, the reinforcing portion 14 and the annular member 16 are inserted in this order from the upper end thereof, and the bolt 30 is attached to the fixing nut portion 29 provided on the back surface of the annular member 16 through the bolt hole 31 in the lower portion of the center member 18. By fixing, the center member 18 and the annular member 16 are fitted and fixed, and at the same time, the locking rib 15 of the reinforcing portion 14 is fixed to the locking rib abutting portion 34 and the annular member 16 formed in the central column mounting portion 21. It is clamped and fixed by the formed locking rib contact portion 37. A protrusion 17 is formed at the tip of the locking rib 15, and is locked from the base portion 20 of the reinforcing portion 14 by being locked in the annular groove 19 formed in the locking rib contact portion of the annular member. Dropout is effectively prevented.

  FIG. 5 is a cross-sectional view showing a deformation when the road sign post of the present invention can be climbed over after being fixed to the road surface. At this time, although the reinforcing portion 14 and the central column are subjected to tensile stress in the portion A, the central column 12 is dropped due to the action of the projections 24 and the tightening member 22, and the locking rib 15 and more preferably the projections 17 are centered. The retaining portion 14 of the member 18 and the retaining rib contact portion 37 of the annular member 16, and more preferably the detachment of the reinforcing portion 14, are effectively prevented by the clamping and fixing action of the annular groove 19.

The perspective view which illustrated the suitable embodiment of the road sign pillar of the present invention A vertical side view of the lower part of the road sign pillar illustrated in FIG. Sectional drawing which showed the center pillar fixing process of the assembly process after manufacturing each member Sectional view showing the reinforcing part fixing process Sectional drawing which showed the deformation | transformation when the vehicle can get over after the road sign pillar of this invention is fixed to the road surface

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Road sign pillar 12 Center pillar 14 Reinforcement part 15 Locking rib 16 Annular member 18 Center member 20 Base part 22 Tightening member

Claims (4)

A base portion made of a thermoplastic resin, a central column made of thermoplastic elastomer standing on the base portion, and a reinforcing portion made of thermoplastic elastomer standing on the outer periphery of the lower portion of the central column of the base portion; Consists of
The base portion is composed of a central member having a central pillar mounting portion at an upper portion and an annular member fixed to the central member,
The central column is externally fitted to the central column mounting portion at the end, and a tightening member is attached to the outer peripheral surface of the external fitting portion of the central column to the central column mounting portion.
An end portion of the reinforcing portion has a locking rib, and the reinforcing member is sandwiched and fixed by the locking rib by the center member and the annular member.   2. The center pillar mounting portion has a ridge in a circumferential direction of an outer peripheral surface, and the fastening member is mounted and fixed to an end side of the center column from the ridge. Road sign pillar. A base part manufacturing process for manufacturing a base part with a thermoplastic resin, a central column manufacturing process for preparing a central pillar with a thermoplastic elastomer, a reinforcing part manufacturing process for manufacturing a reinforcing part with a thermoplastic elastomer, and the central pillar And an assembling step of standing the reinforcing part on the base part,
The base portion is composed of a central member having a central pillar mounting portion at an upper portion and an annular member that can be fixed to the central member,
A locking rib is formed at the end of the reinforcing part,
In the assembling step, an end of the central column is externally fitted to the central column mounting portion of the central member, and the outer peripheral surface of the outer fitting portion of the central column to the central column mounting portion is tightened by a tightening member. A road sign post comprising: a pillar fixing step; and a reinforcing portion fixing step of supplying the reinforcing portion to a lower outer periphery of the central column and clamping the locking rib between the central member and the annular member. Manufacturing method.   The central column attaching portion has a ridge in the circumferential direction of the outer peripheral surface, and the center column fixing step is a step of reducing the diameter by disposing the fastening member on the end side from the ridge. The manufacturing method of the road sign pillar of Claim 3 to do.

Images