JP6321468B2 - How to replace the horizontal beam - Google Patents

Description

  The present invention relates to a method of replacing a lateral beam in a protective fence installed on a road or the like, in particular, a so-called front beam type protective fence in which a lateral beam is attached to the front side of a column.

  Conventionally, as a front beam type protective fence installed on a road or the like, for example, Patent Document 1 discloses that a lateral beam connecting structure has a bracket fixed to a front side with respect to a support column and a longitudinal direction by the bracket. The inner sleeve is supported by fixing the central portion with bolts and nuts after being inserted into the bracket, and as a result, both ends of the inner sleeve are supported. However, it has been disclosed that the protruding portion is protruded from the bracket in the longitudinal direction, and the protruding portions are respectively fitted into the end portions of the transverse beam and further fixed by bolts and nuts.

JP 2007-2613 A

  However, in the case of a protective fence using an inner sleeve as in Patent Document 1, replacement of each lateral beam is a complicated operation. In other words, in order to replace one transverse beam positioned in the middle of the transverse beams that are continuously attached in the longitudinal direction, the bolts that fasten the transverse beam and the inner sleeve to be replaced are removed. However, since the state in which the end portion of the inner sleeve is fitted to the end portion of the beam is maintained, only the transverse beam to be replaced cannot be removed from the support column. Therefore, in order to replace the lateral beam to be replaced, all the lateral beams from the lateral beam at the end of the continuously mounted lateral beam to the lateral beam to be replaced are temporarily It must be removed from the column.

  In addition, a transverse beam damaged by a vehicle collision or the like can be removed from the column regardless of the presence of the inner sleeve by cutting the transverse beam. When installing a new lateral beam, the inner sleeve is in the way and cannot be installed. As a result, as described above, from the lateral beam at the end to the lateral beam to be replaced in order. All lateral beams must be removed from the column once.

  The present invention has been made to solve the above-described conventional problems, and in the protective fence in which the horizontal beam is attached to the support column using the inner sleeve, the replacement work of the horizontal beam to be replaced is efficiently performed. It is intended to provide a lateral beam replacement method that can be implemented in an automated manner.

In order to achieve the above object, the present invention is configured as follows.
That is, in the method of replacing the transverse beam according to the present invention, the inner sleeve is inserted inside the end portion of the tubular transverse beam, and the fastener is placed on the front side of the adjacent support columns installed at intervals on the installation surface. In the protective fence to which the transverse beam is attached via the inner sleeve, a method for replacing the transverse beam to replace a specific transverse beam,
A fastener removing step of removing the fastener;
By moving the first inner sleeve and the second inner sleeve respectively inserted into both ends of the specific lateral beam to the adjacent lateral beam side disposed next to the specific lateral beam, Removing each inner sleeve from both ends of the specific transverse beam, and then removing the specific transverse beam from the column;
The first inner sleeve and the second inner sleeve moved from both ends of the specific lateral beam to the adjacent lateral beam side are arranged at one end of the replacement lateral beam disposed between the adjacent lateral beams. An insertion step of inserting into the part and the other end;
With the first inner sleeve and the second inner sleeve inserted into both ends of the replacement lateral beam, the replacement is performed by the fastener via the first inner sleeve and the second inner sleeve. An attaching step of attaching a horizontal beam for the front side of the support;
Only including,
The inner sleeve includes a sleeve main body and a cover material, and the sleeve main body is provided with a recess in which a mounting bolt head or a nut as the fastener is disposed, and the sleeve main body is a part of a solid rod-shaped body. While being cut off to form a vertical wall-shaped portion, and in a state where the inner sleeve is attached to the support column, the cover material is attached to the sleeve body, and the cover material is attached to the front side surface of the support column. Is installed in contact with
In the removing step, the sleeve material is removed from the specific transverse beam by removing the cover material and moving the sleeve body to the adjacent transverse beam side,
In the inserting step, the sleeve body moved from the specific lateral beam to the adjacent lateral beam is inserted into the replacement lateral beam disposed between the adjacent lateral beams,
Furthermore, a covering step of covering the sleeve main body with the cover material is included between the inserting step and the attaching step .

The guard fence according to the present invention is a guard fence in which a transverse beam is replaced by a transverse beam replacement method, and includes a sleeve body and a cover material, and a mounting bolt head or nut which is the fastener on the sleeve body. Is provided, and the sleeve main body is provided with an inner sleeve in which a part of a solid rod-like body is cut off to form a vertical wall-like portion .

According to the horizontal beam replacement method of the present invention, the inner sleeve is inserted inside the end portion of the cylindrical horizontal beam, and the fastener is attached to the front side of the adjacent struts spaced from each other on the installation surface. In the protective fence to which the transverse beam is attached via the inner sleeve, a method for replacing the transverse beam to replace a specific transverse beam,
A fastener removing step of removing the fastener;
By moving the first inner sleeve and the second inner sleeve respectively inserted into both ends of the specific lateral beam to the adjacent lateral beam side disposed next to the specific lateral beam, After removing the respective inner sleeves from both ends of the specific transverse beam, the specific transverse beam was removed from the support column, and moved from both ends of the specific transverse beam to the adjacent lateral beam side. An insertion step of inserting the first inner sleeve and the second inner sleeve into one end portion and the other end portion of the replacement lateral beam disposed between the adjacent lateral beams; With the first inner sleeve and the second inner sleeve inserted into both ends of the beam, the first inner sleeve and the An attaching step of attaching the replacement lateral beam to the front side of the column via a second inner sleeve. In the attaching step of attaching the replacement transverse beam, the first inner sleeve The second inner sleeve is inserted into both ends of the replacement lateral beam from the adjacent lateral beam disposed adjacent to the replacement lateral beam. As a result, one end of the replacement transverse beam and the first inner sleeve are engaged, and the other end of the replacement lateral beam and the second inner sleeve are engaged, so that the replacement The transverse beam can be supported in a substantially horizontal state, and the replacement work of the transverse beam can be easily performed because the replacement work of the transverse beam is performed by moving the inner sleeve attached to each column.

  According to the transverse beam replacement method of the present invention, the inner sleeve includes a sleeve main body and a cover material, and the sleeve main body is provided with a recess in which a mounting bolt head or a nut as the fastener is disposed. In addition, in the state where the inner sleeve is attached to the support column, the cover material is attached to the sleeve body, and the cover material is attached to the front side surface of the support column. In the removing step, the sleeve material is removed from the specific transverse beam by removing the cover material and moving the sleeve body to the adjacent transverse beam side, and in the inserting step, The sleeve body moved from the specific lateral beam to the adjacent lateral beam side is moved to the adjacent lateral beam. Since it includes a covering step of covering the sleeve body with the cover material between the insertion step and the mounting step, the mounting is fixed to the column. As long as the bolts or nuts are loosened and removed, and then the cover material is removed, the sleeve body becomes movable, and from the specific lateral beam side to the lateral beam side adjacent to the specific lateral beam. Only the specific transverse beam can be removed by moving the sleeve body and extracting the sleeve body from the end of the specific transverse beam.

It is a front view which shows one Embodiment of the protection fence which the replacement | exchange method of the horizontal beam which concerns on this invention is applicable. It is a top view of the principal part expansion of the protection fence shown in FIG. It is a side view of the protective fence shown in FIG. It is sectional drawing of the BB arrow of the protection fence shown in FIG. It is the disassembled perspective view which looked at the protection fence shown in FIG. 1 from the back side. FIG. 2 is a perspective view showing a sleeve body of an inner sleeve used in the protective fence shown in FIG. 1, and (b) is a perspective view seen from the opposite side of (a). FIG. 2 is a perspective view showing a cover material for an inner sleeve used in the protective fence shown in FIG. 1, and (b) is a perspective view seen from the opposite side of (a). It is a disassembled perspective view for demonstrating the process of removing a specific transverse beam in the replacement | exchange method of the transverse beam which concerns on this invention. It is a disassembled perspective view for demonstrating the process of attaching the horizontal beam for replacement | exchange in the replacement | exchange method of the horizontal beam which concerns on this invention.

Next, embodiments for carrying out the present invention will be specifically described with reference to the drawings.
In the description of the specification and claims of the present invention, the side on which the horizontal beam of the column erected on the installation surface is attached is the front side, and the opposite side is the rear side (or the back side). The lateral beam is assumed to extend in the left-right direction with respect to the support column.

  In the drawings, P is a guard fence to which the method of exchanging the transverse beam according to the present invention is applicable, 1 is a column that is erected with an interval on the installation surface G, and 2 is spaced vertically in parallel with the column 1. The horizontal beam 3 attached in two stages is an inner sleeve inserted inside the end of the horizontal beam 2, and the mounting bolt 6 and nut N through which the inner sleeve 3 penetrates the support column 1 in the front-rear direction. Thus, the horizontal beam 2 is attached to the front side of the column.

  The support column 1 is the same as that used for a conventional protective fence, and is generally formed of a circular pipe material whose outer surface is coated with a paint or synthetic resin, The transverse beam 2 is also the same as that used in the conventional protective fence, and is generally formed from a long circular pipe material whose outer surface is coated with a paint or synthetic resin.

  The inner sleeve 3 includes a sleeve main body 4 and a cover material 5 that covers the sleeve main body 4. The sleeve main body 4 has a circular solid bar shape with an outer diameter slightly smaller than the inner diameter of the cylindrical transverse beam 2. A part of the body is cut off to form a vertical wall-like portion 46, the end of which can be inserted inside the end of the transverse beam 2, and the transverse beam 2 and the sleeve body 4 are not greatly rattled. ing.

  The sleeve body 4 and the cover material 5 constituting the inner sleeve 3 may be formed of a synthetic resin that can be manufactured at a low cost. However, since the sleeve body 4 and the cover material 5 are members used for the protective fence P, they are required to have strength against impacts from vehicles and the like. Therefore, it is preferable to use a metal product such as an aluminum alloy or an iron alloy, and it is preferable to use a metal molded product or cast product whose shape can be formed freely to some extent. In this way, by making the inner sleeve 3 (the sleeve body 4 and the cover material 5) a solid metal shape, even if an impact is applied to the protective fence P from the outside, a certain degree of impact is caused. A durable fence can be formed.

  A through-hole 41 that penetrates in the front-rear direction for inserting the body portion 61 of the mounting bolt 6 is provided in the central portion of the sleeve body 4, and the front side of the through-hole 41 is expanded in diameter so that the mounting It is set as the recessed part 42 by which the bolt head 62 or the nut N is arrange | positioned.

  The recess 42 is formed so as to prevent the mounting bolt head 62 or the nut N disposed therein from being turned. In this embodiment, the mounting bolt head 62 or the nut N is a hexagon. Because of the shape, the recess 42 is also a hexagonal recess slightly larger than the mounting bolt head 62 or nut N, and the mounting bolt head 62 or nut N can be fitted into the recess 42 and disposed. When the mounting bolt head 62 or the nut N is rotated and the mounting bolt 6 and the nut N are screwed together, the mounting bolt 6 and the nut N rotate together without causing a so-called rotation. The mounting bolt head 62 or the nut N is prevented from rotating so that the screwing operation can be performed efficiently.

  Further, the central portion of the sleeve body 4 provided with the through hole 41 and the recess 42 communicating with the through hole 41 is provided with a cut portion 43 by cutting the front side and the back side thereof, and the front cut portion 431 and the front cut portion 431, respectively. A rear cut portion 432 is formed, and the cover material 5 is fitted into the cut portion 43 from above to form the inner sleeve 3.

  Further, at both ends of the sleeve body 4, the body portion B 1 of the transverse beam fixing bolt B 1 penetrating in the vertical direction at a position corresponding to the transverse beam mounting hole 21 provided on the lower surface side of the end portion of the transverse beam 2. Is inserted therethrough, and the upper portion of the insertion hole 44 is enlarged in diameter, and is screwed into the transverse beam fixing bolt B1 to fix the transverse beam 2 to the inner sleeve 3. A beam fixing recess 45 is provided in which the beam fixing nut N1 is disposed.

  The beam fixing recess 45 is formed so as to prevent the horizontal beam fixing nut N1 from rotating. In the present embodiment, the beam fixing nut N1 has a hexagonal shape. The fixing recess 45 is also a hexagonal recess that is slightly larger than the transverse beam fixing nut N1, and the transverse beam fixing nut N1 can be fitted in the beam fixing recess 45 and disposed. When performing the work of screwing the transverse beam fixing bolt B1 and the transverse beam fixing nut N1 by rotating the bolt head B1 ", the so-called provision of the transverse beam fixing bolt B1 and the transverse beam fixing nut N1 rotates together. The transverse beam fixing nut N1 is prevented from rotating so that the screwing operation can be performed efficiently without causing rotation. To have.

  The cover member 5 is formed in a U-shape with vertical walls 52 and 53 projecting downward from the front and rear end portions of the horizontal wall 51 on the upper surface side, and opened downward in a side view. The horizontal wall 51 and the vertical wall 52 on the front side are formed in an arc shape on the outer side so that the outer diameter of the horizontal beam 2 is substantially the same as the outer diameter of the horizontal beam 2, and the vertical side on the back side of the cover member 5 is formed. The wall 53 is formed in an arc shape corresponding to the shape of the front side surface 11 of the support column 1.

  In the present embodiment, since the column 1 is circular, the vertical wall 53 on the back side of the cover member 5 has a concave shape in which the outer side surface 531 is recessed in an arc shape in plan view, and further in the center. Is provided with a through hole 532 through which the body portion 61 of the mounting bolt 6 is inserted. Further, the inner side surface 533 of the vertical wall 53 on the back side is provided with a step portion 534 that protrudes toward the vertical wall 52 on the front side, and the cover member 5 extends from the lower opening portion to the sleeve. When fitting into the main body 4, the step portion 534 of the cover material 5 is fitted into the rear cut portion 432 of the sleeve main body 4, and the vertical wall 52 on the front surface side of the cover material 5 is fitted to the front cut portion 431 of the sleeve main body 4. It is designed to fit. Note that the left and right widths of the cover member 5 are narrower than the left and right widths of the sleeve body 4, and the left and right widths of the rear cut portion 432 are narrower than the left and right widths of the front cut portion 431. ing.

  Then, the cover member 5 is fitted into the sleeve main body 4 in a state where the nut N is disposed in the recess 42, and both end portions of the inner sleeve 3 are inserted inside the end portions of the transverse beam 2, and the support column The mounting bolt 6 is inserted through the mounting bolt insertion hole 12 provided in the front-rear direction in FIG. 1, the through-hole 532 of the vertical wall 53 on the back side of the cover member 5, and the through-hole 41 of the sleeve body 4. The outer surface 531 of the vertical wall 53 on the back side of the cover member 5 of the inner sleeve 3 is brought into contact with the front side surface 11 of the inner sleeve 3 by being screwed to the nut N disposed in the recess 42, and 1, the transverse beam is attached. That is, in a state where the inner sleeve 3 is attached to the column 1, the cover material 5 is covered with the sleeve body 4, and the concave portion 42 provided in the sleeve body 4 is concealed and visible from the outside. It is made so that there is no.

  In particular, as shown in FIGS. 2 and 3, the outer side surface 531 of the vertical wall 53 on the back side of the cover member 5 is a concave surface, so that the rear end edge of the end portion in the longitudinal direction of the transverse beam 2 is obtained. 22 is separated from the front end edge 13 of the column 1 by a distance Y and arranged on the rear side (back side). As a result, the width X in the front-rear direction of the protective fence P can be reduced by at least the distance Y, compared to the protective fence having a structure in which a lateral beam is attached to the front end edge of the support column. When the protective fence P is installed on the road, the road width can be widened as much as possible.

  Further, the outer diameter of the outer side surface 531 of the vertical wall 53 on the back side is made larger than the outer diameter of the column 1, and the front side surface 11 of the column 1 extends from the center of the vertical wall 53 on the back side toward the left and right ends. A gap S is formed between the two. Thereby, even if the installation surface G on which the protective fence P is installed is not horizontal but inclined, the inner sleeve 3 can be inclined with the mounting bolt 6 as an axis, and therefore the horizontal Using the same member as the protective fence P used for the installation surface G, the protective fence P can be installed on the inclined installation surface.

  Next, the inner sleeve 3 is inserted into the inner side of the end portion of the cylindrical transverse beam 2, and the mounting bolt 6 as a fastener is attached to the front side surface 11 of the adjacent support column 1 installed at an interval on the installation surface G. In the protective fence P to which the transverse beam 2 is attached via the inner sleeve 3 by the nut and the nut N, if it is necessary to replace the transverse beam, for example, when a vehicle or the like collides with the transverse beam, the identification A method of replacing the horizontal beam 2A will be described.

  First, as shown in FIGS. 8A, 8B, and 8C in order, first, the mounting bolts 6A and 6B and the horizontal beams that are attached to the columns 1A and 1B that are installed on the installation surface G are adjacent to each other. Each of the fixing bolts B1 is loosened and removed, and is covered with the sleeve bodies 4A and 4B of the first inner sleeve 3A and the second inner sleeve 3B respectively inserted into both ends of the specific transverse beam 2A. The cover members 5A and 5B are removed in the upward direction, and the sleeve main bodies 4A and 4B are moved in the lateral direction to the adjacent lateral beams 2B and 2C disposed adjacent to the left and right of the specific lateral beam 2A, By pulling out the sleeve bodies 4A and 4B from both ends of the specific transverse beam 2A, the specific transverse beam 2A is removed from the columns 1A and 1B.

  Then, as shown in order in FIGS. 9A, 9B, and 9C, the sleeve body 4A that has moved from both ends of the specific transverse beam 2A to the adjacent lateral beams 2B and 2C on the left and right sides thereof. And the sleeve body 4B are inserted into one end and the other end of the replacement transverse beam 2D disposed between the adjacent transverse beams 2B and 2C, and the cover members 5A and 5B are inserted into the sleeve body 4A. And the sleeve body 4B from above, and the mounting bolts 6A and 6B and the transverse beam fixed with the first inner sleeve 3A and the second inner sleeve 3B disposed at both ends of the replacement transverse beam 2D. The replacement lateral beam 2D is attached to the front side of the support columns 1A and 1B via the first inner sleeve 3A and the second inner sleeve 3B by tightening the bolt B1. .

  In the above-described embodiment, the nut N is disposed in the concave portion 42 of the sleeve body 4. However, the present invention is not limited to this, and the mounting bolt head 62 may be disposed. In this case, the through-hole 532 provided in the vertical wall 53 on the back side of the cover material 5 extends to the lower end of the vertical wall 53 on the back side, and is an inverted U-shaped hole opened on the lower side. It is good. Further, although the cover material 5 is covered from above the sleeve body 4, it may be covered from below.

  Further, the beam fixing recesses 45 provided at both ends of the sleeve body 4 are not necessarily provided. If not provided, the transverse beam provided on the lower surface side of the end of the transverse beam 2 is not provided. A through hole is provided on the upper surface side of the end portion of the transverse beam 2 corresponding to the attachment hole 21, and the transverse beam fixing bolt B1 having an appropriate length is inserted into the transverse beam attachment hole 21, the through hole on the upper surface side, and the insertion hole of the sleeve body 4. 44, and the transverse beam 2 may be secured by screwing the transverse beam fixing nut B1.

  Further, in the present embodiment, the support column 1 and the transverse beam 2 use a pipe material having a circular cross section, but the present invention is not limited to this, and a pipe material having a square or elliptical cross section is used. It may be used. In that case, the outer surface 531 of the vertical wall 53 on the back side of the inner sleeve 3 and the cover material 5 may be formed so as to correspond to the cross-sectional shapes of the support column 1 and the horizontal beam 2.

1, 1A, 1B Post 11 Front side surface 12 Mounting bolt insertion hole 13 Front edge 2 Horizontal beam 2A Specific lateral beam 2B, 2C Adjacent lateral beam 2D Replacement lateral beam 21 Lateral beam mounting hole 22 Rear edge 3 Inner sleeve 3A 1st inner sleeve 3B 2nd inner sleeve 4, 4A, 4B Sleeve main body 41 Through hole 42 Recess 43 Cut part 431 Front cut part 432 Rear cut part 44 Insertion hole 45 Beam fixing recessed part 46 Vertical wall part 5, 5A, 5B Cover material 51 Upper surface side horizontal wall 52 Front side vertical wall 53 Rear side vertical wall 531 Outer side surface 532 Through hole 533 Inner side surface 534 Step 6, 6, A, 6B Mounting bolt 61 Body 62 Mounting bolt head P Guard fence N Nut B1 Horizontal beam fixing bolt B1 'Body part B1 "Horizontal beam fixing bolt head N1 Horizontal beam fixing nut G Installation surface Longitudinal width Y distance S clearance

Claims (2)

The inner sleeve is inserted inside the end portion of the cylindrical transverse beam, and the transverse beam is attached to the front side of the adjacent column installed at a distance from the installation surface via the inner sleeve with a fastener. A horizontal beam replacement method for replacing a specific horizontal beam in a protective fence,
A fastener removing step of removing the fastener;
By moving the first inner sleeve and the second inner sleeve respectively inserted into both ends of the specific lateral beam to the adjacent lateral beam side disposed next to the specific lateral beam, Removing each inner sleeve from both ends of the specific transverse beam, and then removing the specific transverse beam from the column;
The first inner sleeve and the second inner sleeve moved from both ends of the specific lateral beam to the adjacent lateral beam side are arranged at one end of the replacement lateral beam disposed between the adjacent lateral beams. An insertion step of inserting into the part and the other end;
With the first inner sleeve and the second inner sleeve inserted into both ends of the replacement lateral beam, the replacement is performed by the fastener via the first inner sleeve and the second inner sleeve. An attaching step of attaching a horizontal beam for the front side of the support;
Only including,
The inner sleeve includes a sleeve main body and a cover material, and the sleeve main body is provided with a recess in which a mounting bolt head or a nut as the fastener is disposed, and the sleeve main body is a part of a solid rod-shaped body. While being cut off to form a vertical wall-shaped portion, and in a state where the inner sleeve is attached to the support column, the cover material is attached to the sleeve body, and the cover material is attached to the front side surface of the support column. Is installed in contact with
In the removing step, the sleeve material is removed from the specific transverse beam by removing the cover material and moving the sleeve body to the adjacent transverse beam side,
In the inserting step, the sleeve body moved from the specific lateral beam to the adjacent lateral beam is inserted into the replacement lateral beam disposed between the adjacent lateral beams,
Furthermore, a covering method of covering the sleeve main body with the cover material between the inserting step and the attaching step includes a method of replacing a lateral beam. A protective fence in which a transverse beam is replaced by the transverse beam replacement method according to claim 1, comprising a sleeve main body and a cover material, and a mounting bolt head or nut as the fastener being disposed on the sleeve main body. A protective fence comprising an inner sleeve, wherein the sleeve body is provided with an inner sleeve in which a part of a solid rod-like body is cut off to form a vertical wall-like portion.

Images