JP2013100699A - Protective cap for buried leg, and combination of buried leg and protective cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective cap for a buried leg that is mounted without threadably engaging a buried leg part nor projecting from a road surface, and neither separates nor floats by contacting a grader of a snowplow or the like even if freezing on an upper surface is caused.SOLUTION: The protective cap includes a cap body 31 which is fitted in a first hole part 12 of a buried leg 1, having the first hole part 12 and a second hole part 13 having a smaller diameter than the first hole part 12, so as to close the first hole part 12, and a projection part 32 which is projected from a lower surface of the cap body 31 and fitted in the second hole part 13 of the buried leg 1. The cap body 31 has a height dimension equal to or less than a depth dimension of the first hole 12 of the buried leg 1, and has a knob part 34 for removal formed in a relatively projection shape as a recessed groove 33 is formed in the upper surface. The projection part 32 has a height dimension smaller than a depth dimension of the second hole part 13 of the buried leg 1, and an external diameter including interference for the inner diameter of the second hole part 13 of the buried leg 1.

Description

  The present invention relates to a protective cap for a buried leg, and a combination of a buried leg and a protective cap, and more specifically, after being removed from a road sign post, it is screwed into a buried leg that is still buried on a road surface. A protective cap that can be mounted so as not to protrude from the road surface, and that will not be detached or lifted by contact with a snowplow grader etc. even if the top surface freezes, and a buried leg and this protective cap Related to the combination.

  In order to smoothly guide road traffic, road sign pillars are used as a safety measure. Normally, once a road sign pillar is constructed on the road surface, it will remain installed until it is damaged and needs to be replaced and will not be removed. May be removed from the road surface in winter. In this way, the road sign pillar presupposed to be removed has a buried leg embedded in the road surface in advance, and the male screw part protruding from the lower end of the road sign pillar or the road to the female screw part of the buried leg, or the road It can be attached by screwing a bolt for fixing the pedestal portion of the sign post to the road surface.

  Since the hole is exposed on the road surface of the burying leg after the road sign pillar is removed, there is a possibility that sand or garbage may enter inside and hinder the next road sign pillar installation work. For this reason, conventionally, a protective cap is attached to the burying leg after the road sign pillar is removed to prevent intrusion of sand and dust.

  Japanese Patent Application Laid-Open No. H10-228707 has a flange portion having a diameter larger than the outer diameter of the embedded leg, and a protruding portion protruding from the lower surface of the flange portion is screwed into the female screw portion of the embedded leg. A protective cap is described which covers the surface.

  On the other hand, Patent Document 2 describes a protective cap that is screwed onto a female screw portion of an embedded leg.

  However, if the flange portion or the like protrudes upward from the road surface as in Patent Document 1, it may come off against the grader of the snowplow and be unable to protect the hole portion of the embedded leg. In addition, if the protective cap is screwed onto the female screw part and attached as in Patent Document 2, it can be difficult to remove even if it comes into contact with the grader or the like. Many guides are installed side by side on the road surface for guidance, and it is extremely complicated to screw and attach the protective caps to each embedded leg one by one. Since the sticking state of is hardened, only the portion protruding from the road surface may be destroyed, and there is a possibility that the protective cap cannot be removed when the road sign post is attached next time.

  In order to improve this, conventionally, as shown in FIG. 8, a protective cap 200 formed to have a size enough to close the first hole 101 of the embedding leg 100 embedded in the road surface is used.

  The embedding leg 100 has a first hole 101 that is recessed to a predetermined depth from the upper surface so as to be exposed and open substantially flush with the road surface, and the bottom surface of the first hole 101. A second hole portion 102 having a diameter smaller than that of the first hole portion 101 is formed so as to communicate with the first hole portion 104, and a female screw portion 103 is engraved on the inner peripheral surface of the second hole portion 102. .

  On the other hand, the protective cap 200 is formed so that its height dimension is the same as the depth dimension of the first hole portion 101 so as not to protrude from the road surface, and is accommodated in the first hole portion 101. In this state, the lower surface is placed on the bottom surface 104 of the first hole portion 101 disposed around the second hole portion 102. Two concave grooves 201 are formed on the upper surface of the protective cap 200, and a relatively convex shape is formed between the concave grooves 201, 201 so that it can be picked using a tool such as pliers or pliers when removed. A knob 202 is formed.

  According to this protective cap 200, since it does not protrude from the road surface, there is no risk that it will hit the grader of the snowplow and come off, and it is not necessary to be screwed with the female thread portion 103 of the embedded leg 100, There is an advantage that it is very easy to install and remove.

  However, in this protective cap 200, as shown in FIG. 9A, when water accumulates in the concave groove 201, the water 300 freezes and the expanded ice 300 protrudes on the road surface. When the grader G comes into contact with the ice 300, as shown in FIG. 9B, the protective cap 200 is scraped upward together with the ice 300 that is the grader G, and is easily detached from the embedding leg 100. There's a problem.

  Further, even when the grader G is not completely detached, the protective cap 200 may be lifted from the embedding leg 100 by vibration when the grader G comes into contact with the ice 300. There is a risk of trash entering. If sand or debris enters the gap between the protective cap 200 and the embedding leg 100, the protective cap 200 cannot be restored, or the sand or debris clogged in the gap becomes a great resistance when removing the protective cap 200 and is removed. There is a problem that becomes difficult.

  Even if the protective cap 200 can be removed, there is a possibility that sand or dust that has entered through the gap due to the rising will enter the second hole 102. If you try to install the road sign pillar in this state, not only will it affect the rotation of the screw, it will be difficult to attach the road sign pillar, but if it is installed forcibly, sand and dust will be caught in the screwed part. There is a problem that the road sign pillars cannot be removed.

No. 4-7216 JP-A-7-238515

  The present invention has been made in view of the above-described conventional circumstances, and can be mounted so as not to protrude from the road surface without being screwed to the embedded leg portion, and with a snowplow grader or the like even if freezing occurs on the upper surface. It is an object of the present invention to provide a protective cap for a buried leg that does not cause separation or lifting due to contact.

  In addition, the present invention can be mounted so that the protective cap does not protrude from the road surface without screwing the embedment leg and the protective cap, and even if freezing occurs on the upper surface of the protective cap, It is an object of the present invention to provide a combination of a burying leg and a protective cap that does not cause separation or lifting due to contact.

  Other problems of the present invention will become apparent from the following description.

  The above problems are solved by the following inventions.

(Claim 1)
A first hole recessed from the top surface and a second hole recessed further from the bottom surface of the first hole and having a smaller diameter than the first hole are embedded in the road surface. As a result, a male screw portion for standingly detachably mounting the road sign post on the road surface is screwed into the female screw portion carved on the inner peripheral surface of the second hole portion. A protective cap for the embedded leg attached to the leg for closing the first hole,
A cap body fitted into the first hole so as to close the first hole;
A protrusion projecting from the lower surface of the cap body and fitted into the second hole of the embedded leg,
The cap body has a height dimension equal to or less than a depth dimension of the first hole portion of the burying leg, and has a concave groove on the upper surface so that the cap body has a relatively convex shape. A knob is formed,
The projecting portion is made of synthetic resin, the height dimension is smaller than the depth dimension of the second hole portion of the burying leg, and the outer diameter is that of the second hole portion of the burying leg. An embedded leg protective cap characterized by having a tightening allowance with respect to the inner diameter.

(Claim 2)
2. The protective cap for an embedded leg according to claim 1, wherein a height dimension of the cap body is smaller than a depth dimension of the first hole portion of the embedded leg.

(Claim 3)
3. The protective cap for an embedded leg according to claim 1, wherein the cap and the protrusion are integrally formed of a synthetic resin.

(Claim 4)
A first hole recessed from the top surface and a second hole recessed further from the bottom surface of the first hole and having a smaller diameter than the first hole are embedded in the road surface. As a result, a male screw portion for standingly detachably mounting the road sign post on the road surface is screwed into the female screw portion carved on the inner peripheral surface of the second hole portion. Legs,
A combination with a protective cap attached so as to close the first hole of the embedded leg,
The protective cap includes a cap body fitted into the first hole so as to close the first hole;
A protrusion projecting from the lower surface of the cap body and fitted into the second hole of the embedded leg,
The cap body has a height dimension equal to or less than a depth dimension of the first hole portion of the burying leg, and has a concave groove on the upper surface so that the cap body has a relatively convex shape. A knob is formed,
The projecting portion is made of synthetic resin, the height dimension is smaller than the depth dimension of the second hole portion of the burying leg, and the outer diameter is that of the second hole portion of the burying leg. A combination of an embedding leg and a protective cap, characterized by having an allowance for the inner diameter.

(Claim 5)
The combination of the embedding leg and the protective cap according to claim 4, wherein the cap body has a height dimension smaller than a depth dimension of the first hole portion of the embedding leg.

(Claim 6)
6. The combination of an embedding leg and a protective cap according to claim 4, wherein the cap part and the protrusion part are integrally formed of a synthetic resin.

  According to the present invention, it can be mounted so as not to protrude from the road surface without being screwed to the embedded leg, and even if the upper surface is frozen, it may be detached or lifted by contact with a grader or the like of a snowplow. No buried leg protection cap can be provided.

  Further, according to the present invention, the protective cap can be mounted so as not to protrude from the road surface without screwing the embedded leg and the protective cap, and even if the upper surface of the protective cap is frozen, the grader of the snowplow, etc. It is possible to provide a combination of a burying leg and a protective cap that does not cause detachment or lifting due to contact with.

Longitudinal sectional view of a leg for embedding combined with a protective cap according to the present invention The figure which shows the state where the road sign pillar was attached to the leg for burial The top view of the protective cap which concerns on this invention A longitudinal sectional view taken along line (iv)-(iv) in FIG. Sectional drawing which shows the state which attached the protective cap which concerns on this invention to the leg for burial The figure explaining the effect | action of the protective cap which concerns on this invention attached to the burying leg (A) is a top view which shows the other aspect of the protective cap based on this invention, (b) is the longitudinal cross-sectional view. Sectional drawing which shows the state which attached the conventional protective cap to the leg for embedding The figure explaining the problem of the conventional protective cap

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a longitudinal sectional view of a burying leg combined with a protective cap according to the present invention, FIG. 2 is a view showing a state where a road sign pillar is attached to the burying leg, and FIG. 3 is a protection according to the present invention. FIG. 4 is a longitudinal sectional view taken along line (iv)-(iv) in FIG. 3, and FIG. 5 is a sectional view showing a state in which the protective cap according to the present invention is attached to the burying leg. FIG. 6 is a view for explaining the action of the protective cap according to the present invention attached to the burying leg.

  First, an embedding leg for standing a road sign post detachably on a road surface will be described with reference to FIGS.

  The embedding leg 1 includes a first hole 12 having a circular shape in a plan view recessed from the upper surface of a bottomed cylindrical metal leg body 11 at a predetermined depth, and a bottom surface of the first hole 12. A second hole 13 that is recessed at a predetermined depth from 12 a and has a circular shape in a plan view that is smaller in diameter than the first hole 12 is integrally formed. A female screw portion 14 is engraved on the inner peripheral surface of the second hole portion 13.

  Such an embedding leg 1 is embedded in advance in a place where the road sign post 2 should be erected in such a manner that the opening surface of the first hole 12 is substantially flush with the road surface GL. At the lower end of the road sign pillar 2, a mounting bolt 21 for mounting to the burying leg 1 is projected, and this mounting bolt 21 is inserted to the position of the second hole 13 of the burying leg 1 to By rotating the sign post 2 itself, the male screw part of the outer peripheral surface of the mounting bolt 21 is screwed with the female screw part 14 of the second hole 13 to attach the road sign post 2 to the road surface GL (FIG. 2). ).

  Although not shown in the drawings, separate mounting bolts are inserted into a plurality of positions on the periphery of the pedestal portion 22 at the lower end of the road sign post 2 and each mounting bolt is screwed to the corresponding embedded leg 1 to be attached. It may be.

  In the vicinity of the lower end of the leg main body 11, a small diameter portion 15 having a small outer diameter is formed. The adhesive used for embedment bites into the small diameter portion 15 so that the embedded leg 1 is removed. Stop is planned.

  Next, a protective cap combined with the burying leg 1 to protect the burying leg 1 will be described with reference to FIGS.

  The protective cap 3 includes a cap body 31 and a protrusion 32 that protrudes from the lower surface 31 a of the cap body 31. The cap body 31 and the protrusion 32 are made of synthetic resin, and are integrally formed of a soft synthetic resin such as polyurethane resin. By the integral molding, the structure is simple and can be manufactured at low cost.

  The cap body 31 is a portion that is fitted into the first hole 12 so as to close the first hole 12, has a circular shape in plan view, and the first hole 12 of the embedding leg 1. Has the same outer diameter (maximum diameter) as the inner diameter. That is, for example, when the inner diameter of the first hole 12 is 42 mm, the outer diameter of the cap body 31 is also 42 mm. For this reason, when it is attached to the embedding leg 1, it fits into the first hole 12 without any gap, and the intrusion of sand and dust is prevented (FIG. 5).

  In order to allow the protective cap 3 to be attached to the embedment leg 1 so that it cannot be easily removed, the cap body 31 is usually slightly more than the inner diameter of the first hole 12. In order to prevent slipping out due to the presence of a protrusion 32, which will be described later in detail, in the present invention, it is possible to form a tightening margin on the cap body 31. Not required.

  The portion of the maximum diameter that is the same as the inner diameter of the first hole portion 12 is only the portion from the upper end 31 b of the cap body 31 to the slightly lower side. The side surface of the cap body 31 is formed in a tapered shape that gradually becomes slightly smaller in diameter from the lower end to the lower end of the upper end 31b, so that the fitting of the embedding leg 1 into the first hole 12 is smooth. To be able to do.

  The cap body 31 has a height dimension h1 equal to or less than a depth dimension d1 of the first hole portion 12 of the embedding leg 1 (h1 ≦ d1). For this reason, when attached to the embedding leg 1, the cap body 31 does not protrude upward from the upper surface of the embedding leg 1, so that there is no possibility of coming into contact with the grader of the snowplow.

  Preferably, h1 is made smaller than d1 (h1 <d1) (FIG. 5). Thereby, contact avoidance with a grader can be made more reliable. In this case, the difference between h1 and d1 may be as small as about 1 to 2 mm. For example, when the depth dimension d1 of the first hole 12 of the embedding leg 1 is 20 mm, the height dimension h1 of the cap body 31 is It can be 19 mm.

  Two concave grooves 33 are formed on the upper surface of the cap body 31. Each groove 33 has a semicircular shape in a plan view, and is arranged so that the linear portions thereof are opposed to each other, so that a single knob portion that is relatively convex between the grooves 33 and 33 is formed. 34 is formed.

  The knob 34 is a part that is pinched with a tool when the protective cap 3 is removed. In order to facilitate the removal work, it is desirable to make a large allowance for the tool. It is necessary to increase the depth of the groove 33. Usually, if the concave groove 33 is formed too deeply, the bottom surface portion of the cap body 31 becomes thin and it becomes difficult to maintain the outer shape, and distortion tends to occur.

  However, in the present invention, since the protrusion 32 described later is provided on the lower surface of the cap body 31, the presence or absence of the protrusion 32 can suppress deformation and distortion of the cap body 31, and the depth of the concave groove 33. It becomes possible to form deeply to increase the picking allowance. For example, the recessed depth from the upper surface of the recessed groove 33 can be set to 1/2 to 2/3 of the height dimension h <b> 1 of the cap body 31.

  The protruding portion 32 is a portion that is fitted into the second hole portion 13 of the embedding leg 1, and is formed to project from the lower surface 31 a of the cap body 31 in a cylindrical shape. The cap body 31 has a cylindrical shape with a constant outer diameter from the connection end to the lower end, but only the tip 32a of the cap has a tapered shape of about 10 ° so that its outer shape is slightly tapered. Thus, the insertion into the second hole 13 can be performed smoothly.

  Since this protrusion 32 is not screwed into the female screw portion 14 of the embedding leg 1 as in the prior art, no male screw is engraved on the outer peripheral surface thereof. If the synthetic resin material is relatively elastic, it can be solid without a cavity inside the protrusion 32. However, as shown in the drawing, the lightening portion extends from the lower surface to the cap body 31 slightly. By forming 35, it is preferable to release an extra force applied when the second threaded portion 13 is pressed against the female screw portion 14 so that the female screw portion 14 is smoothly bitten. .

  The height dimension h <b> 2 of the protrusion 32 is smaller than the depth dimension d <b> 2 of the second hole 13 of the embedding leg 1. For example, it can be set to about 1/3 to 2/3 of d2.

  Further, the outer diameter of the protrusion 32 has a margin for the inner diameter of the second hole 13. For example, when the female screw portion 14 of the second hole portion 13 is a screw portion corresponding to M24 (screw bottom size 21.5 mm, screw thread size 20.752 mm), the outer diameter of the protrusion 32 is 21.5 mm. By doing so, it is preferable that a tightening margin of about 0.2 mm is formed. By providing such a tightening allowance, the protective cap 3 can be closely fitted to the second hole 13 of the embedding leg 1 at the portion of the protrusion 32, and the protective cap can be provided even if vibration occurs. 3 is prevented from being lifted. Since the tip 32a has a tapered shape and is made of a synthetic resin, attachment to the second hole 13 is not difficult.

  Next, the operation when the embedding leg 1 and the protective cap 3 are combined will be described with reference to FIGS.

  In the protective cap 3 configured as described above, the protrusion 32 is press-fitted into the second hole 13 of the embedding leg 1, and the lower surface 31 a of the cap body 31 is formed on the first hole 12 of the embedding leg 1. By being pushed downward without being screwed into contact with the bottom surface 12a, the first hole 12 and the second hole 13 are fitted and mounted (FIG. 5). In this mounted state, the upper end 31b of the cap body 31 does not protrude from the upper end of the embedding leg 1, and does not protrude upward from the road surface GL.

  In a state where the protective cap 3 is attached to the burying leg 1 embedded in the road surface GL, the cap body 31 does not protrude upward from the road surface GL, but water accumulates on the upper surface of the protective cap 3 (in the concave groove 33). And ice may form. If the height dimension h1 of the cap body 31 is smaller than the depth dimension d1 of the first hole 12 of the embedding leg 1 as shown in the present embodiment, even if the water accumulated in the concave groove 22 freezes, The ice hardly protrudes above the road surface GL, but depending on the amount of accumulated water, the ice 300 may protrude above the road surface GL (FIG. 6A).

  In this case, the tip of the grader G of the snowplow hits the ice 300 and tries to scrape off the ice 300 (FIG. 6B). At this time, the force acting in the traveling direction A of the grader G applied to the protective cap 3 is The lower surface 31a opposite to the entry side of the grader G acts on the cap body 31 of the protective cap 3 as a downward force a1 that tries to press against the bottom surface 12a of the embedding leg 1, and the lower surface 31a and the bottom surface 12a acts as a lateral force a2 that moves the lower end of the protrusion 32 toward the entry side of the grader G (the direction opposite to the traveling direction A) with the contact portion with 12a as a fulcrum. As a result, the protective cap 3 is prevented from moving in a direction away from the contact portion between the lower surface 31a of the cap body 31 and the bottom surface 12a of the first hole 12 of the embedding leg 1, and the grader G is iced. Only 300 is scraped off, and the protective cap 3 is prevented from being detached (FIG. 6C).

  In addition, since the protrusion 32 of the protective cap 3 is engaged with the female screw 14 of the second hole 13 of the embedding leg 1 by being closely fitted, the grader G and the ice 300 are engaged with each other. There is no backlash due to vibration caused by contact or the like, and there is no gap between the cap main body 31 and the embedding leg 1 due to floating, and sand and dust can be reliably prevented from entering.

  In the embodiment described above, the knob portion 36 including one protrusion is illustrated as the knob portion of the protective cap 3, but the knob portion may protrude upward from the road surface GL when the knob portion is attached to the burying leg 1. There is no limitation as long as it can be easily picked and removed at the time of removal.

  For example, FIG. 7A is a plan view of the protective cap 3 showing another aspect of the knob, and FIG. 7B is a longitudinal sectional view thereof. This protective cap 3 is formed with one concave groove 36 that is recessed in its entirety except for the central portion of the upper surface of the cap body 31, thereby forming a single protruding shape that is relatively convex from the center of the bottom surface. A knob 37 is formed. The knob portion 37 includes a columnar base portion 37a extending upward from the bottom surface of the concave groove 36, and a head portion 37b formed at the tip of the base portion 37a so as to have a larger diameter than the outer diameter of the base portion 37a. Have.

  According to this knob 37, the protective cap 3 can be removed from the embedment leg 1 by sandwiching the base 37a with a tool such as pliers and pulling it upward as it is. The large-diameter head 37b prevents the tool from coming off the base 37a during removal.

1: Leg for embedding 11: Leg body 12: First hole 12a: Bottom surface 13: Second hole 14: Female thread 15: Small diameter part 2: Road marking pillar 21: Mounting bolt 22: Base part 3: Protective cap 31: Cap body 31a: Lower surface 31b: Upper end 32: Projection part 32a: Tip 33: Groove 34: Knob part 35: Meat removal part 36: Recessed part 37: Knob part 37a: Base part 37b: Head part 300: Ice GL : Road surface G: Snowplow grader

Claims (6)

A first hole recessed from the top surface and a second hole recessed further from the bottom surface of the first hole and having a smaller diameter than the first hole are embedded in the road surface. As a result, a male screw portion for standingly detachably mounting the road sign post on the road surface is screwed into the female screw portion carved on the inner peripheral surface of the second hole portion. A protective cap for the embedded leg attached to the leg for closing the first hole,
A cap body fitted into the first hole so as to close the first hole;
A protrusion projecting from the lower surface of the cap body and fitted into the second hole of the embedded leg,
The cap body has a height dimension equal to or less than a depth dimension of the first hole portion of the burying leg, and has a concave groove on the upper surface so that the cap body has a relatively convex shape. A knob is formed,
The height of the protrusion is smaller than the depth of the second hole of the burying leg, and the outer diameter is relative to the inner diameter of the second hole of the burying leg. A protective cap for a buried leg having a fastening allowance.   2. The protective cap for an embedded leg according to claim 1, wherein a height dimension of the cap body is smaller than a depth dimension of the first hole portion of the embedded leg.   3. The protective cap for an embedded leg according to claim 1, wherein the cap and the protrusion are integrally formed of a synthetic resin. A first hole recessed from the top surface and a second hole recessed further from the bottom surface of the first hole and having a smaller diameter than the first hole are embedded in the road surface. As a result, a male screw portion for standingly detachably mounting the road sign post on the road surface is screwed into the female screw portion carved on the inner peripheral surface of the second hole portion. Legs,
A combination with a protective cap attached so as to close the first hole of the embedded leg,
The protective cap includes a cap body fitted into the first hole so as to close the first hole;
A protrusion projecting from the lower surface of the cap body and fitted into the second hole of the embedded leg,
The cap body has a height dimension equal to or less than a depth dimension of the first hole portion of the burying leg, and has a concave groove on the upper surface so that the cap body has a relatively convex shape. A knob is formed,
The projecting portion is made of synthetic resin, the height dimension is smaller than the depth dimension of the second hole portion of the burying leg, and the outer diameter is that of the second hole portion of the burying leg. A combination of an embedding leg and a protective cap, characterized by having an allowance for the inner diameter.   The combination of the embedding leg and the protective cap according to claim 4, wherein the cap body has a height dimension smaller than a depth dimension of the first hole portion of the embedding leg. 6. The combination of an embedding leg and a protective cap according to claim 4, wherein the cap part and the protrusion part are integrally formed of a synthetic resin.

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