JP2011042925A - Guard fence for road - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a guard fence for a road which is mounted to a support by being bolt-connected by means of a nut of a nut holding member inserted into a hollow portion of a beam pipe. <P>SOLUTION: A pipe retainer 2b joined to the beam pipe 5 is formed at a bracket; and the nut holding member 6 is fitted into the hollow portion from an end of the beam pipe 5. The nut holding member 6 has a nut fitting portion which holds the nut in a non-turnable state in a position corresponding to a bolt hole of the beam pipe 5, the bolt hole of the beam pipe 5 agrees with a position of the nut 7 held by the nut holding member 6, and a bolt 8 is inserted into the bolt hole of the bracket, and joined by being screwed into the corresponding nut 7 of the nut holding member 6. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  In the present invention, the left and right beam pipes are abutted in series at the front position of a pillar built on the ground with a space along the longitudinal direction of the road, and the above-mentioned butted state is obtained using a bracket attached to the front face of the pillar. It belongs to the technical field of road protection fences that are made by attaching beam pipes to pillars, and more specifically, road protection that is attached to pillars by bolting using nuts of nut holding members inserted into hollow parts of beam pipes. Regarding the fence.

Conventionally, a road guard fence in which the left and right beam pipes adjacent to each other at the front surface position of a support column are continuously aligned, and the beam pipe in the abutted state is attached to the support column using a bracket attached to the front surface of the support column. The structure illustrated in FIGS. 11 to 14 is known.
That is, a bracket 20 is attached to the front surface of the pillars 1 and 1 built on the ground at intervals along the longitudinal direction of the road, and the butt connection of the beam pipe 5 and the attachment to the pillar 1 are performed using the bracket 20. It has been broken.
As shown in FIG. 13, the bracket 20 of the illustrated example has a cylindrical shape that is long in the horizontal direction when viewed in the side direction, and the base end (fixed portion 20 a) on the square side is the front surface of the column 1. The bolt 3 which is applied to a state where it is in close contact with each other, and has penetrated the column 1 substantially horizontally from the back side to the front side is passed through the bolt hole provided in the fixing portion 20a of the bracket 20, and the nut 4 is screwed from the front side. Fastened and attached.
The front end side of the bracket 20 having a square cylindrical shape has a semicircular shape in which the outer diameter surface of the beam pipe 5 is substantially inscribed. The beam pipes 5 and 5 inserted into the hollow portion of the bracket 20 from the left and right are As shown in FIG. 13, it is inscribed in the tip side inner surface made semi-circular. When the beam pipes 5 and 5 are viewed in a plan view, as shown in FIG. 14, both ends are not completely abutted, and a slight gap S (around S = 10 mm) is opened. The gap S exists as an adjustment allowance for adjusting a dimensional error and a construction error between an interval between adjacent columns 1 and 1 and the length of each beam pipe 5. Thus, the left and right beam pipes 5 and 5 are in a butted state in a series of contrasting positions with a gap S between the left and right sides of the column 1 as a center, and substantially vertically downward from the upper surface side to the lower surface side of the bracket 20. The nut 22 is screwed and fastened to the lower end side of the bolt 21 that also penetrates the beam pipe 5, and the beam pipes 5, 5 are connected to the bracket 20 and attached to the bracket 20.
Therefore, the head of the bolt 21, the nut 22 and the bolt shaft portion are exposed on the upper and lower surfaces of the bracket 20. Therefore, it looks bad from a passerby or a driver of the vehicle, and there is a concern that the exposed head portion of the bolt 21 and the nut 22 and the bolt shaft portion may hurt a passer's hand or the like who is gripped by the beam pipe 5 and walks.

Similarly, a road guard fence in which a bracket is attached to the front surface of a support and the beam pipe is butt-connected and attached to the support using the bracket is also disclosed in, for example, Patent Documents 1 and 2 below. .
The invention “protective fence” described in Patent Document 1 is particularly suitable for the connection of the beam pipe according to the description of FIG. 2 of the same publication and the description of paragraph numbers [0012] and [0013] explaining FIG. A sleeve is used. The inner sleeve is passed through the hollow part of the fitting (bracket), a bolt that passes vertically through the fitting (bracket) and the inner sleeve is passed, and the nut is tightened from below to attach the inner sleeve. . Then, fit the beam pipe into the outer periphery of the inner sleeve that protrudes to the left and right of the fitting (bracket), insert the bolt upward from below into the nut prepared on the inner surface of the inner sleeve, and screw it into the nut The butt connection of the beam pipe is made. Therefore, in addition to the bolt heads and nuts exposed on the upper and lower surfaces of the fittings (brackets), this protective fence also has a poor appearance due to the multiple bolt heads exposed on the lower surface side of the beam pipe. I can't get rid of the fear of hurting the passersby's hands.

  Further, the invention “Guard Fence” described in Patent Document 2 is based on the description of FIGS. 4 and 5 of the same publication and the description of paragraph 0034 and below explaining the same figure. However, a joint end fitting formed of a foamed urethane resin in a solid rod shape is used. This joint end fitting is formed in the shape of a solid rod that fits closely into the hollow part of the beam pipe, and vertical bolt through holes are provided in a penetrating manner at a plurality of locations in the length direction. This joint end fitting is passed through the hollow part of the cylindrical bracket attached to the front surface of the support column in advance and protrudes to the left and right lengths around the position of the support column. The joint end fitting is attached to the cylindrical bracket by tightening a nut from below to a bolt that penetrates a vertical bolt through hole of the joint end fitting toward the head. Then, the left and right beam pipes are fitted into the outer peripheral portion of the joint end fitting protruding to both sides of the cylindrical bracket, and vertically downward to the vertical bolt through hole of the joint end fitting through the bolt hole of the beam pipe. The nuts are fastened from below to the bolts that are passed through, and the butt connection of the left and right beam pipes is performed. Therefore, the plurality of bolt heads and nuts are exposed on the upper and lower surfaces of the bracket and the upper and lower surfaces of the beam pipe, and the appearance of the bolts and nuts is poor.

JP 2006-63611 A JP 2007-2528 A

  The road guard fence illustrated and illustrated in FIGS. 11 to 14 as the prior art, and the road guard fence disclosed in Patent Documents 1 and 2 described above are individually connected to the butt connection of the beam pipe and the bracket. And a mounting structure to a support column. However, both of the conventional techniques end up with multiple bolt heads and nuts exposed on the upper and lower surfaces of the bracket and on the upper and lower surfaces of the beam pipe, and it looks bad and damages the hand of a passerby who grabs and walks on the beam pipe. There are common concerns and improvements are desired.

The object of the present invention is to improve the beam pipe butt connection, bracket mounting, and column mounting structure in a road guard fence of the type in which the left and right beam pipes adjacent to each other at the front position of the column are butted in series. At least the top surface of the bracket and the top surface of the beam pipe are not exposed to the bolt heads and nuts, and the road protection fence that has good appearance and does not damage the hand of a passerby grabbing the beam pipe. Is to provide.
The next object of the present invention is to provide a nut holding member in which a bolt joint for abutting a series of beam pipes, a bolt joint to be attached to a bracket, and a bolt joint to be attached to a column are inserted into the hollow portion from the end of the beam pipe. Is to provide road fences made using

As means for solving the above-mentioned problems, the road fence according to the invention described in claim 1 is:
Brackets 2 are attached to pillars 1 built on the ground at intervals along the road, and the left and right beam pipes 5 and 5 are road guard fences formed by bolting the bracket 2;
A pipe receiving portion 2b provided with a bolt hole 2c for bolting the beam pipe 5 to the bracket 2 is formed,
The beam pipe 5 is provided with a bolt hole 5a at a position coinciding with the bolt hole 2c provided in the bracket 2, and a nut holding member 6 (or 6 ′, 6 ″) from the end of the beam pipe 5 into the hollow portion. And the same shall apply hereinafter)
The nut holding member 6 is shaped to restrict movement in a direction perpendicular to the tube axis of the beam pipe 5, and holds the nut in a non-rotating state at a position coinciding with the bolt hole 5a of the beam pipe 5. A nut fitting portion 6b that holds the nut 7 in the nut fitting portion 6b,
The bolt holes 5a of the left and right beam pipes 5 and 5 are aligned with the positions of the nuts 7 held by the nut holding members 6 inserted into the hollow portions from the ends thereof, and the respective bolt holes are connected to the pipes of the bracket 2. It is matched with the corresponding bolt hole 2c of the receiving portion 2b, and the bolt 8 is inserted into the bolt hole 2c from the outside of the pipe receiving portion 2b and is screwed and joined to the corresponding nut 7 of the nut holding member 6. Features.

The invention described in claim 2 is the road fence 2 according to claim 1,
The bracket 2 passes the other end of the bolt 3 penetrating the support column 1 in the horizontal direction through the bolt hole 2d of the fixing plate portion 2a of the bracket 2 applied to the front surface of the support column 1, and fastens the nut 4. It is attached to the column 1
The beam pipe 5 is applied from the fixing plate portion 2a of the bracket 2 to the front surface of the front-side pipe receiving portion 2b obtained by bending the bracket 2 in a substantially downward U shape when viewed in the side surface direction. The bolt hole 2c provided in the portion 2b is aligned with the bolt hole 5a of each beam pipe 5, and the bolt 8 is inserted into the bolt hole 2c from the outside of the pipe receiving portion 2b, and inserted into the hollow portion of each beam pipe 5. The nut holding member 6 is screwed and joined to the nut 7 held by the nut holding member 6.

The invention described in claim 3 is the road fence according to claim 1 or 2,
The nut holding member 6 includes two insertion portions 6a to be inserted into both hollow portions from the end portions of the left and right beam pipes 5 and 5, and the end portion of the beam pipe 5 is interposed between the two insertion portions 6a and 6a. Is provided with an abutting portion 6e against which the two abut against each other and at least one insertion portion 6a on each side, and a nut fitting portion 6b at a position coinciding with the bolt hole 5a of the beam pipe 5.
The invention described in claim 4 is the road fence according to any one of claims 1 to 3,
The nut holding member 6 ″ is formed as a pair of insertion members 6a and 6a that are individually inserted into the hollow portions of the left and right beam pipes 5 and 5, and at least one bolt hole 5a of the beam pipe 5 is inserted into each insertion portion 6a. The nut fitting portion 6b is provided at a position coinciding with, and the end portion of each insertion member 6a is provided with a butting portion 6f against which the end portion of the beam pipe 5 abuts.
The invention described in claim 5 is the road fence according to claim 3 or 4,
The abutting portion 6e of the nut holding member 6 is characterized in that the outer diameter of the abutting portion 6e interposed between the ends of the left and right beam pipes 5 and 5 is equal to or less than the outer diameter of the beam pipe 5. To do.
The invention described in claim 6 is the road fence according to any one of claims 1 to 5,
The nut fitting portion 6b of the nut holding member 6 is formed larger than the outer diameter of the nut 7, and the nut 7 fitted into the nut fitting portion 6b is held loosely so as not to rotate in the nut fitting portion 6b. It is characterized by.
The invention described in claim 7 is the road fence according to any one of claims 1 to 6,
The nut fitting portion 6b includes a locking portion 6d that prevents the nut 7 inserted into the nut fitting portion 6b from dropping off.
The invention described in claim 8 is the road fence according to any one of claims 1 to 7,
The nut holding member 6 is formed of a synthetic resin.
The invention described in claim 9 is the road fence according to any one of claims 1 to 8,
The nut fitting portion 6b of the nut holding member 6 is formed with a nut insertion portion in which a part of the opening is cut out so that the nut 7 can be slid in the lateral direction and fitted.

The invention described in claim 10 is the road fence according to claim 1 or 2,
The bracket 2 has an outer diameter of the beam pipe 5 from the fixing plate portion 2a that is fixed by the bolt 3 and the nut 4 that penetrates the support column 1 in the horizontal direction to the front side that is bent in a substantially downward U shape when viewed from the side. A pipe receiving portion 2b having a bolt hole 2c for bolting with the beam pipe 5 is formed in an approximate arc concave shape.
The invention described in claim 11 is the road fence according to claim 1, 2 or 10,
The head 8a of the bolt 8 that is bolted by applying the beam pipe 5 to the bracket 2 is formed as a flat head having a low height.
The invention described in claim 12 is the road fence according to claim 1, 2 or 10,
The bolt 8 that joins the bracket 2 and the beam pipe 5 has a flat head portion 8a, and is inserted upward or obliquely upward from the outer lower portion of the pipe receiving portion 2b of the bracket 2 so that the nut holding member 6 It is characterized by being screwed into the corresponding nut 7.
The invention described in claim 13 is the road fence according to claim 1 or 2,
Only one joint is formed between adjacent beam pipes 5 and 5.

The guard fence for road according to the invention described in claims 1 to 13 is a pipe of the bracket 2 which is attached to the column 1 in advance in the vicinity of the ends of the beam pipes 5 and 5 which are abutted in series at the position of the column 1 from the left and right. Bolt holes 5a that match the respective bolt holes 2c and 2c provided in the receiving portion 2b are provided, and the bolt holes 5a of the beam pipe 5 are connected to the nut holding member 6 fitted from the end into the hollow portion of the beam pipe 5. The matching nuts 7 are held in a non-rotating state, and the left and right beam pipes 5, 5 have their bolt holes 5a aligned with the bolt holes 2c of the pipe receiving part 2b of the bracket 2, and the pipe receiving parts 2b The bolt 8 inserted into the bolt hole 2c from behind is screwed and fastened to the nut 7 of the nut holding member 6, and the beam pipes 5, 5 are connected to each other and attached to the bracket 2. It has achieved attachment to the strut 1 to coalescence. As a result, the head 8a of the joining bolt 8 is exposed to the back surface of the pipe receiving portion 2b formed on the front surface side by bending in a substantially downward U shape when viewed in the side surface direction, It is difficult to enter the field of view of the drivers of vehicles running on the roadway. Further, since the degree of exposure (presence) of the bracket 2 is small, a simple-shaped beam pipe joint is formed, and the design and aesthetics are excellent. And there is almost no worry of hurting the hand of the person who grabs the beam pipe 5 and walks.
The guard fence for road according to the present invention includes a beam joint that abuts the beam pipe 5 in series, a bolt joint that attaches the beam pipe 5 to the bracket 2, and a bolt joint that attaches the beam pipe 5 to the column 1. The nut holding member 6 inserted into the hollow portion from the end of the nut is used for the positioning, and the positioning operation for matching the nut 7 of the nut holding member 6 with the position of the bolt hole 5a of the beam pipe 5 is easy. It is. In addition, since the nut 7 of the nut holding member 6 is held in a non-rotating state and also includes a locking portion 6d that prevents the nut 7 from falling off, the bolt 8 inserted from the bolt hole 2c of the bracket 2 is attached to the nut holding member. The work of screwing and joining to the corresponding nuts 7 of 6 can be performed easily and quickly, and the construction work of the road protection fence can be performed in a short period of time with high quality.

The road fence according to the present invention uses the nut holding member 6 to hold the nut 7 in the hollow portion of the beam pipe 5, so that the beam pipe 5 and the bracket 2 can be firmly joined to each other by the bolt 8 very easily. Can be done.
In particular, the tip portions of the left and right beam pipes 5 and 5 are abutted by sandwiching the enlarged diameter portion 6e or the abutting portion 6f at the center of the nut holding member 6 from both sides. 5a and the nut 7 held by the nut holding member 6 can be easily aligned, a concave step between the ends of the left and right beam pipes 5 and 5 can be prevented, and the beam pipes 5 and 5 can be matched. The joint between the end portions can be formed in a smooth state, and the presence of the gap can be made visually inconspicuous. Furthermore, the opening of the beam pipes 5 and 5 can be sealed in a watertight manner to prevent the effects of water immersion.
Moreover, as is apparent from FIGS. 1 and 2, an expanded diameter portion 6e or abutting portion 6f of the nut holding member 6 is interposed between the butted ends of the left and right beam pipes 5 and 5, so that one joint can be said. A very simple form of road guard fence can be constructed.

It is the front view which showed the Example of the guard fence for roads by this invention. It is the top view which expanded and partially fractured | ruptured the RR arrow view of FIG. The side view which expanded the PP line arrow of FIG. It is the perspective view which looked at the bracket from the back side. It is the explanatory perspective view which decomposed | disassembled the support | pillar which comprises the guard fence for roads by this invention, a beam pipe, a bracket, and a nut holding member, and showed it by the related arrangement | positioning. It is a detailed perspective view of a nut holding member. It is a front view of a nut holding member. 7A is a cross-sectional view of the nut holding member shown in FIG. 7 taken along the line VII-VII, B is a cross-sectional view taken along the line VIII-VIII, and FIG. C shows an embodiment having a different configuration from the same viewpoint as FIG. FIG. A and B are perspective views showing different embodiments of the nut holding member. 9B is a perspective view showing an embodiment in which a meat stealer is formed in the insertion portion of one of the nut holding members shown in FIG. 9B. FIG. It is the front view which illustrated the conventional protective fence for roads. It is a side view of the protection fence for roads same as the above. It is a side view of the XX line arrow of FIG. It is a top view of the YY line arrow of FIG.

A bracket 2 is attached to a column 1 built on the ground with a space along the road, and a road guard fence is constructed in which the left and right beam pipes 5 and 5 are bolted to the bracket 2.
The bracket 2 is formed with a pipe receiving portion 2b provided with a bolt hole 2c for bolting to the beam pipe 5.
The beam pipe 5 is provided with a bolt hole 5a at a position coinciding with the bolt hole 2c provided in the bracket 2, and a nut holding member 6 (or 6 ', 6 "is inserted from the end of the beam pipe 5 into the hollow portion. Including the same.)
The nut holding member 6 has a shape in which movement in a direction perpendicular to the tube axis of the beam pipe 5 is restricted, and holds the nut in a non-rotating state at a position coincident with the bolt hole 5a of the beam pipe 5. A nut fitting portion 6b is provided, and the nut 7 is held by the nut fitting portion 6b.
The bolt holes 5a of the left and right beam pipes 5 and 5 are aligned with the positions of the nuts 7 held by the nut holding members 6 inserted into the hollow portions from the ends thereof, and the respective bolt holes are connected to the pipes of the bracket 2. The bolt 8 is inserted into the bolt hole 2c from the outside of the pipe receiving portion 2b, and is screwed into the corresponding nut 7 of the nut holding member 6 so as to match the corresponding bolt hole 2c of the receiving portion 2b.

The nut holding member 6 includes two insertion portions 6a and 6a, which are inserted into both hollow portions from the end portions of the left and right beam pipes 5 and 5, with a fixed length, an enlarged diameter portion 6e or a butting portion 6f (hereinafter referred to as a bottom portion). In some cases, both are collectively referred to as an abutting portion.) At least one at each insertion portion 6a and a nut fitting portion 6b at a position corresponding to the bolt hole 5a of the beam pipe 5. And the nut fitting portion 6b holds the nut 7 for bolt joining. Alternatively, each of the left and right beam pipes 5 and 5 is configured as a nut holding member 6 ″ composed of a pair of insertion members 6a ′ and 6a ′ that are individually inserted into a hollow part at a certain length into the hollow part (FIG. 9B). At least one insertion member 6a ′ is provided with a nut fitting portion at a position coinciding with the bolt hole 5a of the beam pipe 5, and a nut 7 for bolt joining is held in the nut fitting portion (hereinafter referred to as a nut). The holding member may simply be denoted by reference numeral 6).
The expanded diameter portion 6e or the abutting portion 6f of the nut holding member 6 is formed at the center in the length direction as being interposed between the butted end portions of the left and right beam pipes 5 and 5. The outer diameter of the nut holding member 6 is a beam pipe. The outer diameter is equal to or less than 5. Further, the shape of the expanded diameter portion 6e seen in the front direction is a drum shape including a smooth arc as shown in FIG. 6 or 7, and a linear inclined surface (conical shape) like a so-called abacus ball. ) To form an angular shape. The nut holding member 6 is preferably formed of a synthetic resin.
The above-described nut holding member 6 has such a shape that movement in a direction orthogonal to the tube axis of the beam pipe 5 is restricted, and when the nut holding member 6 is inserted into the hollow portion of the beam pipe 5, the rattling degree is allowed. However, this means that the position is fixed and the movement (sliding movement) is limited to such an extent that it does not hinder the bolt joining operation. This means that the movement is limited even if no special positioning means is applied, and the state in which the nut 7 held by the nut holding member 6 and the bolt hole 5a of the beam pipe 5 are matched does not hinder the bolt joining operation. It means a shape that restricts movement to the extent.

Hereinafter, the present invention will be described based on the embodiments shown in FIGS.
As illustrated in FIGS. 1 to 3, the road guard fence of the present invention is adjacent to the left and right beam pipes 5 at the front positions of the columns 1 and 1 that are built on the ground at intervals in the longitudinal direction along the road. The beam pipes 5 and 5 in a butted state are attached to the support column 1 using the bracket 2 attached to the front surface of the support column 1.
As shown in FIGS. 2 to 5, the bracket 2 is formed by press-molding a steel plate. From the fixing plate portion 2 a that is fixed by the bolt 3 and the nut 4 that penetrate the support column 1 in the horizontal direction, FIG. When the bracket 2 is viewed in the lateral direction as shown in FIG. 2, the pipe receiving portion 2b having an arcuate concave shape approximating the outer diameter of the beam pipe 5 is formed on the front side thereof, and is bent into a substantially downward U shape. A total of two bolt holes 2c, 2c are provided, one at a position near the lower half on both the left and right sides of the portion 2b (but not limited to two). A bolt hole 2d through which the bolt 3 penetrating the support column 1 in the horizontal direction is provided at a substantially central position of the fixed plate portion 2a. In addition, the code | symbol 1a in FIG. 3 is the cap which plugged up the upper end opening of the support | pillar 1 made from a steel pipe, and is attached with the volt | bolt 3. FIG.

The left and right beam pipes 5 that are abutted in series at the front surface position of the support column 1 coincide with the respective bolt holes 2c provided on the left and right sides of the pipe receiving portion 2b of the bracket 2 at positions near the ends thereof. One bolt hole 5a is provided at each position (however, as long as one piece is provided, the required number is provided) (FIG. 5).
The nut holding member 6 is fitted into the hollow portion from the end of the beam pipe 5 to a certain depth.

The basic form of the nut holding member 6 shown in FIGS. 5 to 8 is a solid rod-like body having an outer diameter that can be closely fitted into the hollow portion of the beam pipe 5. Two insertion portions that are formed into a drum-shaped portion 6e that is larger than the inner diameter and smaller than the outer diameter and swells like a drum, and that are fitted into the hollow portions of the left and right beam pipes 5 and 5 equally on both sides. 6a and 6a are formed in series (FIGS. 5 and 7). Each of the two insertion portions 6a and 6a has a nut fitting portion 6b that holds the nut 7 in a non-rotating state at a position that coincides with the bolt hole 5a of the beam pipe 5 as a through hole in the diameter line direction, and It is formed in a hexagonal hole shape that restrains the nut 7 in a non-rotating state (FIGS. 7 and 8).
Inside the nut fitting portion 6b, a receiving seat 6c of the nut 7 is provided in a vertical stepped surface shape at a certain depth from the opening surface (FIG. 8). Therefore, the nut 7 inserted into the nut fitting portion 6b is supported in a non-rotating state in which the bottom surface sits on the receiving seat 6c and is stable and does not rotate when the bolt is joined. As a means for preventing the rotation, the hexagonal hole serving as the nut fitting portion 6b has a slightly larger diameter than the nut 7 and is formed in a size (hole diameter) sufficient to hold the rotation-prevented state. Therefore, the nut 7 whose bottom surface is seated on the receiving seat 6c is held with a slight margin in the gap with the hexagonal hole. It is convenient for work to do.

  Next, the nut 7 that is loosely inserted into the hexagonal hole-shaped nut fitting portion 6b as described above so as to be slightly grabbed restrains the state where the nut 7 is seated on the receiving seat 6c, and at least prevents it from falling off. As shown in FIGS. 7 to 8, the engaging portion 6d that holds and supports the upper surface (outer surface) of the nut 7 sitting on the receiving seat 6c is one side of the hexagon of the nut 7 in the illustrated example. It is provided at a position to hold down the central part. The specific structure of the locking portion 6d has a hook shape that supports the upper surface of the nut 7 sitting on the receiving seat 6c so that FIGS. 6 and 8 can be easily understood. The hook shape is formed by molding a part of the material resin of the nut holding member 6 formed of foamable or non-foamable synthetic resin, so that the nut 7 is elastically bent and the nut 7 is fitted into the nut fitting portion 6b. It is allowed to enter and exit, and is formed in a spring structure that reliably supports the upper surface of the nut 7 sitting on the receiving seat 6c. Accordingly, the nut 7 once inserted into the nut fitting portion 6b and seated on the receiving seat 6c is supported by the hook serving as the locking portion 6d while pressing the upper surface thereof, and the direction of the nut holding member 6 is changed vertically and horizontally. In the degree, the nut is securely held so as not to drop off from the nut fitting portion 6b.

Therefore, when the end portions of the left and right beam pipes 5 and 5 are aligned with the insertion portions 6a and 6a of the nut holding member 6 having the above-described configuration and inserted into the hollow portions, the distal ends of the beam pipes 5 and 5 are finally obtained. For example, as shown in FIG. 2, the gap portion of the joint 10 is filled as shown in FIG. 2, and the joint 10 at the butt end of the beam pipes 5 and 5 is pushed. In order to prevent the formation of a concave dent or step, the joint between the butted ends of the beam pipes 5 and 5 is formed in a smooth state, and the openings of the beam pipes 5 and 5 are sealed in a watertight manner to It becomes the structure which prevents an evil. That is, the above-mentioned expanded diameter portion 6e swelled in a drum shape is a component that finally becomes a dead end or a contact portion when the left and right beam pipes 5 and 5 are brought into contact with each other.
The left and right beam pipes 5 and 5 are connected in series in the above-mentioned butted state with the nut holding member 6 as an intermediary, and the position of the nut 7 held by each nut fitting portion 6b of the nut holding member 6 is set to each beam pipe. The beam pipes 5 are connected to the front surface of the pipe receiving portion 2b of the bracket 2 which is bolted in advance to the front surface of the support column 1 as described above after being aligned with the positions of the bolt holes 5a and 5a. 5 and the bolt holes 5a of the beam pipes 5 and 5 are matched with the corresponding bolt holes 2c and 2c of the pipe receiving portion 2b. Then, the bolts 8 are inserted into the respective bolt holes 2c from the rear side of the pipe receiving portion 2b and screwed into the corresponding nuts 7 of the nut holding member 6 as they are, so that each beam pipe 5 and the bracket are directly connected. As a result, the left and right beam pipes 5 and 5 are butt-joined in series with the bracket 2 as a mediation, and the beam pipe 5 is attached to the column 1 via the bracket 2 as a result. The construction of the road guard fence shown in FIG. 1 is performed.
That is, since the construction is performed by one bolt 3 that attaches the bracket 2 to the column 1 and two bolts 8 and 8 that join the left and right beam pipes 5 and 5 to the bracket 2, respectively, the number of steps is small. As a result, the construction period can be shortened and the cost can be reduced.

Moreover, as apparent from FIGS. 1 and 2, the above-mentioned expanded diameter portion 6 e of the nut holding member 6 is pushed and expanded to one joint 10 formed between the butted ends of the left and right beam pipes 5, 5. Thus, the joint 10 is prevented from generating a dent due to the swelling of the enlarged diameter portion 6e, or is kept flat, thereby making it possible to construct a road guard fence with a good appearance and a simple design form. In addition, the flat head 8a of the joining bolt 8 is slightly exposed at the lower part of the back side of the bracket 2 at the portion, and the bolt shaft and nut are exposed to the outside of the beam pipe 5 and the bracket 2 as much as possible. Further, most of the brackets are also configured to have a thin design hidden behind the beam pipe 5 (FIGS. 2 and 3).
More specifically, as shown in FIG. 3, the bolt 8 that joins the beam pipe 5 to the bracket 2 is inserted from the lower rear side of the pipe receiving portion 2b of the bracket 2 in an upward direction of about 45 degrees with respect to the horizontal. The head 8a of the bolt 8 is formed flat. Therefore, the presence of the bolt 8 is not present in the field of view of the driver of the vehicle traveling on the road and the pedestrian walking on the sidewalk. If the head 8a of the bolt 8 is viewed from behind the column 1, it is difficult to see the head 8a of the bolt 8 because the head 8a is hidden from the line of sight. Therefore, a visually simple and smart road protection fence is provided.

  The nut holding member 6 described above is a synthetic resin molded article that is suitable for mass production, can be manufactured lightly at low cost, and is easy to handle and easy to handle, such as thermosetting or thermoplastic resin, specifically phenol resin or epoxy. Molded with resin, melamine resin, unsaturated polyester resin, polypropylene resin or the like. It is preferable to mold with low / medium foam or high foam polystyrene resin, polypropylene resin or the like, but it is also possible to mold with non-foamed resin.

The form and configuration of the nut holding member are not limited to the embodiment shown in FIGS. 6 and 7, but are also implemented in the configurations shown in FIGS. 9A and 9B.
The nut holding member 6 shown in FIG. 6 and FIG. 7 has a drum-shaped expansion diameter that forms an abutting portion so as to push against the ends of the left and right beam pipes 5 and 5 when the left and right beam pipes 5 and 5 are fitted. It is the structure which provided the part 6e in the center part. On the other hand, the nut holding member 6 ′ of the embodiment shown in FIG. 9A has a flange-shaped butting portion 6f (pushing edge) where the ends of the left and right beam pipes 5 and 5 abut the center portion. 5 is formed to be substantially the same diameter as the outer diameter of 5, and other configurations are the same as those of the first embodiment.
Further, the nut holding member 6 ″ shown in FIG. 9B has a pair of insertions in a form equivalent to the flange-shaped butting portion 6f of the nut holding member 6 ′ of the embodiment shown in FIG. Each of the insertion members 6a ′ is configured to have a flange-shaped butting portion 6f at one end, and the ends of the left and right beam pipes 5 and 5 are individually configured. After that, the left and right beam pipes 5 and 5 are butted together so that the butted portions 6f and 6f of the pair of insertion members 6a ′ and 6a ′ are butted.
Accordingly, the method of using the nut holding member 6 ″ and the operational effects thereof are substantially the same as those of the above embodiments, and can be used for the construction of a road protection fence.
Note that the nut holding member 6 ″ shown in FIG. 9B is a pair of parts equivalent to a halved central portion of the drum-like expanded diameter portion 6e in the nut holding member 6 of the first embodiment shown in FIGS. It can be similarly configured and implemented with a set of insertion members.

Further, as a third embodiment, as shown in FIG. 8C, the nut 7 is provided at the opening edge of each nut fitting portion 6b with respect to the nut holding member 6 or 6 ′ or 6 ″ having the configuration of each embodiment described above. It is possible to use a nut holding member formed with a nut insertion portion 6g with one side cut out so that it can be slid sideways and fitted. The operation of fitting the nut 7 into the fitting portion 6b can be easily performed, which is convenient.
In addition, although the illustration of the nut holding member of each of the above embodiments is omitted, the movement of the nut holding member in a direction orthogonal to the tube axis of the beam pipe 5 is limited. As long as it comprises, it can carry out by carrying out the meat stealing process as much as possible except the part essential to the function and application of the nut holding member. This is because the amount of material to be used can be reduced on the one hand, and the weight can be reduced on the other hand to reduce the manufacturing cost. As an example, the nut holding member illustrated in FIG. 10 is stealed with respect to one (left side) insertion member 6a ′ constituting the nut holding member 6 ″ illustrated in FIG. 9B. In the case where the insertion member 6a 'is inserted into the hollow portion of the beam pipe 5, there is a portion that is inscribed in the inner surface of the beam pipe 5 and causes friction. As long as this occurs, the movement of the beam pipe 5 in the direction perpendicular to the tube axis is limited, and the bolt connection using the nut 7 held by the beam pipe 5 becomes possible.

  Although the present invention has been described above based on the illustrated embodiments, the present invention is not limited to the configuration of the above embodiments. It should be noted that it includes a range of design changes and application variations made by those skilled in the art as needed without departing from the scope and purpose of the invention.

DESCRIPTION OF SYMBOLS 1 Support | pillar 2 Bracket 3 Bolt 4 Nut 5 Beam pipe 5a Bolt hole 2a Fixing plate part 2b Pipe receiving part 2c Bolt hole 6 Nut holding member 6 ', 6 "Nut holding member 6a Inserting part 6a' Inserting member 6b Nut fitting part 6d Stop part 6e Expanded part 6f Butting part 6g Notch part 7 Nut 8 Bolt 8a Bolt head 10 Joint

Claims (13)

Brackets are attached to pillars built on the ground at intervals along the road, and the left and right beam pipes are road guard fences that are bolted to the brackets,
A pipe receiving portion provided with a bolt hole for bolting the beam pipe to the bracket is formed,
The beam pipe is provided with a bolt hole at a position corresponding to the bolt hole provided in the bracket, and a nut holding member is fitted into the hollow portion from the end of the beam pipe,
The nut holding member is shaped to restrict movement in a direction perpendicular to the tube axis of the beam pipe, and a nut fitting portion that holds the nut in a non-rotating state at a position coincident with the bolt hole of the beam pipe And holding the nut in the nut fitting portion,
The bolt holes of the left and right beam pipes are aligned with the positions of the nuts held by the nut holding members inserted into the hollow portions from the end portions thereof, and the respective bolt holes are matched with the corresponding bolt holes of the pipe receiving portion of the bracket. The road fence according to claim 1, wherein a bolt is inserted into the bolt hole from the outside of the pipe receiving portion and screwed and joined to the corresponding nut of the nut holding member. The bracket is attached to the column by passing the other end of the bolt that penetrates the column in the horizontal direction through the bolt hole in the fixed plate of the bracket applied to the front of the column, fastening the nut,
The beam pipe is applied from the fixed plate portion of the bracket to the front surface of the pipe receiving portion on the front side which is bent in a substantially downward U shape when the bracket is viewed in the side direction, and is provided in the pipe receiving portion. The bolt hole is aligned with the bolt hole of each beam pipe, the bolt is inserted into the bolt hole from the outside of the pipe receiving part, and screwed and joined to the nut held by the nut holding member inserted into the hollow part of each beam pipe. The road fence according to claim 1, wherein   The nut holding member includes two insertion portions to be inserted into both hollow portions from the end portions of the left and right beam pipes, and includes a butting portion where the end portion of the beam pipe abuts between the two insertion portions. The road guard fence according to claim 1 or 2, further comprising a nut fitting portion at a position coinciding with the bolt hole of the beam pipe, at least one for each insertion portion.   The nut holding member is formed as a pair of insertion members that are individually inserted into the hollow portions of the left and right beam pipes, and includes at least one nut insertion portion at each insertion portion at a position corresponding to the bolt hole of the beam pipe, The road fence according to any one of claims 1 to 3, wherein the end of each insertion member is provided with an abutting portion against which an end of the beam pipe abuts.   The abutting portion of the nut holding member is formed so that the outer diameter of the abutting portion interposed between the end portions of the left and right beam pipes is equal to or less than the outer diameter of the beam pipe. Guard fence for road described in 1.   The nut fitting portion of the nut holding member is formed larger than the outer diameter of the nut, and the nut fitted into the nut fitting portion is held loosely enough not to rotate in the nut fitting portion. The road fence according to any one of claims 1 to 5.   The road guard fence according to any one of claims 1 to 6, wherein the nut fitting portion includes a locking portion that prevents the nut inserted into the nut fitting portion from falling off.   The road guard fence according to any one of claims 1 to 7, wherein the nut holding member is made of synthetic resin.   The nut insertion portion of the nut holding member is formed with a nut insertion portion in which a part of the opening is notched so that the nut can be slid sideways and fitted. The road fence as described in any one of 8.   The bracket has an arc concave shape that approximates the outer diameter of the beam pipe on the front side that is bent in a substantially downward U shape when viewed from the side, from the fixing plate part that is fixed with bolts and nuts that penetrate the pillar in the horizontal direction. The road guard fence according to claim 1 or 2, wherein a pipe receiving portion provided with a bolt hole for bolting to the beam pipe is formed.   The road fence according to claim 1, 2 or 10, wherein the head of the bolt to be bolted by applying the beam pipe to the bracket is formed as a flat head having a low height.   The bolt that joins the bracket and the beam pipe has a flat head, and is inserted upward or obliquely upward from the outside lower part of the pipe receiving portion of the bracket and screwed into the corresponding nut of the nut holding member. The road guard fence according to claim 1, 2, or 10.   The road fence according to claim 1 or 2, wherein only one joint between adjacent beam pipes is formed.

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