JP2009097205A - Method of replacing beam of guard pipe, and guard pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate replacement of a beam of a guard pipe using inner sleeves. <P>SOLUTION: There is provided a method of replacing the beam of the guard pipe, which is composed of the following steps. In the detaching step, a specific beam 51 is detached from the guard pipe. In the insertion step, a first inner member is detached from a connector and a beam adjacent to the specific beam, and inserted into one end of a replacement beam to be newly introduced. In the mounting step, while a second inner member is inserted into an end of the replacement beam, that is opposite to the end into which the first inner member is inserted, the end into which the first inner member is inserted is held in a position opposed to the corresponding connector, and the first inner member is moved to the connector in the opposed position. Thus both the ends of the first inner member are protruded from the connector, and insertable into the replacement beam and the beam adjacent to the same. In such a state, both the ends of the first inner member are fastened to the beams into which they have been inserted. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a beam replacement method and a guard pipe in a guard pipe for preventing a vehicle from entering beyond a road boundary.

  Conventionally, in order to prevent a vehicle from entering beyond a road boundary, a guard pipe is provided so as to separate the boundary between the roadway and the sidewalk, the boundary between the roadway and the roadway, or the boundary between the roads.

  The guard pipe mainly has a plurality of support columns arranged in a line at intervals, and both ends thereof are supported directly or indirectly by the respective support columns so as to connect two adjacent support columns. It is comprised from the pipe-shaped beam provided substantially horizontally.

Patent Document 1 proposes a guard pipe that supports a beam substantially horizontally using a rigid member having an outer diameter that fits inside the beam, called an inner sleeve (inner member). In the case of a guard pipe using an inner sleeve as in Patent Document 1, the inner sleeve plays a role of increasing the strength of a connecting portion of adjacent beams, and the strength as a guard pipe can be ensured. For example, as shown in FIG. 8, the guard pipe 110 using the inner sleeve has the support 2 and the beams 51 and 52, and the inner sleeve 4 connects the ends of these beams 51 and 52 to the support 2. Both ends are inserted into the ends of the beams 51 and 52 for indirect connection to the beam.
JP 2007-2613 A

  However, in the case of a guard pipe using an inner sleeve as in Patent Document 1, replacement of each beam is a very complicated operation. For example, in order to replace one beam provided in the middle part of the guard pipe, even if the bolt that fastens the beam to be replaced and the inner sleeve is removed, the end of the inner sleeve still remains. Since the state of being fitted to the end of the beam is maintained, only the beam to be replaced cannot be removed from the column. Therefore, in order to replace this beam, all beams from the end of the guard pipe (the beginning or end of the column of columns) to the intermediate beam to be replaced must be removed from the column once. I must.

  A beam that cannot be reused due to breakage or the like can be removed from the support column by cutting the beam regardless of the presence of the inner sleeve. However, even in that case, when the new beam is attached, the inner sleeve becomes an obstacle and cannot be attached as it is, so that it is necessary to remove another beam after all.

  The present invention has been made in view of the above-described conventional problems, and provides a beam replacement method and a guard pipe in a guard pipe that can easily perform a beam replacement operation in a guard pipe using an inner sleeve. The purpose is that.

  The beam replacement method in the guard pipe according to the present invention includes a plurality of columns arranged in a row at intervals, and a plurality of beams arranged in a tubular shape between adjacent columns. A connecting device for connecting the end of each beam to a corresponding support, the connecting device extending in a direction substantially perpendicular to the support and a connector attached to a side of each support. An inner member that is held by the connector so as to be movable in the direction in a posture and that protrudes from the connector to both sides in the substantially orthogonal direction and is inserted into the corresponding beam end, the beam end, and the beam A method for replacing a specific beam of a guard pipe having a fastener for fastening an inner member inserted into an end portion, wherein the specific beam is connected to both ends of the beam. A removal step of removing the first inner member and the second inner member to be fitted from each other, and removing the first inner member from the beam adjacent to the connector and the specific beam, and a newly introduced replacement. An insertion step of inserting the beam into one end of the beam, and a state in which the second inner member is inserted into an end of the replacement beam opposite to the end where the first inner member is inserted. The end where the first inner member is inserted is held at a position facing the corresponding connector, and the first inner member is moved to the connector side at that position to move the first inner member from the connector to the first. Both ends of one inner member protrude to be inserted into the replacement beam and the adjacent beam. In this state, both ends of the first inner member are respectively inserted into the beams into which both ends are inserted. Conclusion Characterized in that it comprises a mounting process that.

  The beam replacement method in the guard pipe according to the present invention includes a plurality of columns arranged in a row at intervals, and a plurality of beams arranged in a tubular shape between adjacent columns. A connecting device for connecting the end of each beam to a corresponding support, the connecting device extending in a direction substantially perpendicular to the support and a connector attached to a side of each support. An inner member that is held by the connector so as to be movable in the direction in a posture and that protrudes from the connector to both sides in the substantially orthogonal direction and is inserted into the corresponding beam end, the beam end, and the beam A method for replacing a specific beam of a guard pipe having a fastener for fastening an inner member inserted into an end portion, wherein the specific beam is connected to both ends of the beam. A removing step of removing the first inner member and the second inner member to be fitted from each other, and fastening of the first inner member and the specific beam are removed, and the first inner member is moved to the adjacent side. An insertion step of inserting the matching beam further into the back, and the other end of the replacement beam facing the corresponding connector with the second inner member inserted into one end of the replacement beam The first inner member is returned from the adjacent beam to the connector side at the position, so that both end portions of the first inner member protrude from the connector so that the replacement beam and the adjacent beam are adjacent to each other. And an attachment step of fastening both ends of the first inner member to the beams into which the both ends are inserted in this state.

  According to the above invention, in the attachment step of attaching a specific beam, the first inner member is moved to a predetermined position, and both ends of the first inner member are protruded from the connector to be adjacent to the replacement beam. Insert into the beam. As a result, one end of the replacement beam is engaged with the first inner member, the other end of the replacement beam is engaged with the second inner member, and the replacement beam is substantially horizontal. Supported by the state. As described above, the replacement member is attached by moving the inner member attached to each support column. Therefore, for example, even in the case of a guard pipe using an inner member such as an inner sleeve, the beam replacement operation is easily performed. be able to.

  Further, in the beam replacement method in the guard pipe, in the inserting step, one end of the inner member operating wire is connected to the first inner member, and then the first inner member is connected to the replacement beam or It is preferable that the first inner member is moved in the axial direction of the beam by inserting it into the end of the adjacent beam and pulling the inner member operating wire from the outside of the beam in the attaching step.

  According to the present invention, since the inner member is inserted into the end of the beam after the end of the inner member operating wire is connected to the inner member, the inner member in the beam can be easily operated from the outside. can do. That is, in the step of attaching the beam, the inner member can be easily moved in the axial direction of the beam simply by pulling the inner member operating wire from the outside of the beam.

  Further, in the beam replacement method in the guard pipe for moving the first inner member using the inner operation wire, in the attachment step, the inner member operation wire may be the adjacent beam or the replacement beam. And the first inner member are preferably led out to the outside through a through-hole provided in the adjacent beam or the replacement beam.

  According to this invention, the inner member housed in the beam can be operated from the outside of the beam by allowing the inner member operation wire to be led out of the beam through the through hole provided in the beam. . In addition, since a through hole provided in the beam is used to insert the bolt, it is not necessary to newly form a dedicated through hole for leading out the inner member operating wire. In addition, when the bolt is inserted into the through-hole of the beam, the bolt functions like a plug, preventing water from entering the inside of the beam through the through-hole formed in the beam, and corroding the beam. Can be suppressed.

  Further, in the beam replacement method in the guard pipe for moving the first inner member using the inner operation wire, the insertion step includes a protrusion formed at an end of the first inner member. It is preferable that one end of the inner member operating wire is hooked, and the first inner member is inserted into the end portion of the replacement beam or the adjacent beam from the protruding portion side.

  According to this invention, since the protrusion for hooking one end of the inner member operating wire is formed at the end of the inner member, the inner member operating wire can be easily connected to the inner member. .

  Further, in the beam replacement method in the guard pipe, a through-hole into which the tip of the inner member operating tool can be inserted from the outside to the inside is provided at both ends of each beam, and the surface of each inner member is provided. Are arranged in a direction parallel to the projecting direction, and are formed with a plurality of engaging portions that are respectively engageable with the inner member operating tool, and are provided in the replacement beam or the adjacent beam in the attaching step. The inner member operating tool is engaged with an appropriate engaging portion of the first inner member while the inner member operating tool is inserted into the replacement beam or the adjacent beam from the through hole. By repeating the operation of moving the first inner member in the axial direction of the beam for each engaging portion, both end portions of the first inner member protrude from the connector to both sides thereof. It is preferred that to a position wherein the moving the first inner member.

  According to this invention, the inner member operating tool is inserted from the through hole formed in the beam, and the inner operating tool is inserted into the plurality of engaging portions formed in parallel with the protruding direction of the inner member. Since the inner member protrudes from the connector while repeatedly engaging and moving the inner member, the position of the inner member can be finely adjusted in the axial direction of the beam.

  Further, in the beam replacement method in the guard pipe, a through hole for inserting a tip of an inner member operation tool from the outside to the inside is provided at both ends of each beam, and the surface of each inner member Includes a plurality of engaging portions that are arranged in a direction parallel to the protruding direction and are respectively engageable with the inner member operating tool. In the removing step, the plurality of engaging portions are provided on the specific beam or the adjacent beam. The inner member operating tool is engaged with an appropriate engaging portion of the first inner member while the inner member operating tool is inserted into the specific beam or the adjacent beam from the formed through hole. It is preferable to remove the first inner member from the specific beam by moving the first inner member of the lever in the axial direction of the beam.

  According to the present invention, the inner member is moved in the axial direction of the beam inside the beam, thereby disengaging the inner member from the specific beam or the inner member and the connector from each other. Even for a specific beam provided in the middle part of the pipe, only the specific beam can be removed without cutting.

  In the beam replacement method in the guard pipe, the beam may be detached from the first inner member and the second inner member by cutting the specific beam in the middle of the removing step.

  According to this invention, the operation | work which removes a specific beam can be performed rapidly.

  The guard pipe of the present invention includes a plurality of support columns arranged in a row at intervals, a plurality of beams that are tubular and disposed between adjacent support columns, and ends of each beam. A guard pipe having a connecting device for connecting a portion to a corresponding support column, the connecting device being a connector attached to a side portion of each support column and in a direction substantially orthogonal to each of the support columns. An inner member that is held by the connector so as to be movable in the direction in an extending posture and that protrudes from the connector to both sides in the substantially orthogonal direction and is inserted into an end of the corresponding beam; and an end of the beam; A fastener for fastening the inner member to be inserted into the end portion, and at least one of both end portions in the longitudinal direction of the inner member, the inner member is moved inside the beam by an operation from the outside. That Wherein the inner member manipulation wire projecting portion connectable to move in the direction are provided.

  According to this invention, since the protrusion part which can connect the inner member operation wire for moving the inner member in the axial direction within the beam by the operation from the outside is provided, the inner member is By moving and projecting both ends of the inner member from the connector and inserting them into the replacement beam and the adjacent beam, the replacement beam to be newly introduced is attached. Therefore, when replacing the beam located in the middle part of the guard pipe, it is not necessary to remove all the beams from the beam located at the end part of the guard pipe to the beam to be replaced located in the middle part. Therefore, the beam replacement operation can be easily performed in the guard pipe using the inner sleeve (inner member).

  The guard pipe of the present invention includes a plurality of support columns arranged in a row at intervals, a plurality of beams that are tubular and disposed between adjacent support columns, and ends of each beam. A guard pipe having a connecting device for connecting a portion to a corresponding support column, the connecting device being a connector attached to a side portion of each support column and in a direction substantially orthogonal to each of the support columns. An inner member that is held by the connector so as to be movable in the direction in an extending posture and that protrudes from the connector to both sides in the substantially orthogonal direction and is inserted into an end of the corresponding beam; and an end of the beam; A fastener for fastening the inner member to be inserted into the end, and a through-hole through which the fastener can be inserted is provided at the end of each beam, and the surface of the inner member The through hole Characterized in that al the inner member operating tool can engage the engaging portion to be inserted inside the respective beams are arranged in the longitudinal direction of the inner member.

  According to this invention, on the surface of the inner member, the engaging portions that can be engaged with the inner operation tool inserted into the beam from the through hole formed in the beam are arranged in the longitudinal direction of the inner member. . The inner member is moved using the through holes formed in the engaging portion and the beam, and both end portions of the inner member are protruded from the connector and inserted into the replacement beam and the adjacent beam. Install the replacement beam. Therefore, when replacing the beam located in the middle part of the guard pipe, it is not necessary to remove all the beams from the beam located at the end part of the guard pipe to the beam to be replaced located in the middle part. Therefore, the beam replacement operation can be easily performed in the guard pipe using the inner sleeve (inner member).

  The guard pipe further includes a reinforcing tool for bringing the both end portions of the inner member into close contact with the inner surface of the beam into which the end portions are inserted, and the reinforcing tool includes the connector and the beams on both sides thereof. It is preferable to have a reinforcing member main body having a shape straddling the end of the reinforcing member and a reinforcing fastener for fastening an intermediate portion of the reinforcing member main body to the inner member through a through hole provided in the connector.

  According to this invention, the reinforcing member main body is provided so as to straddle the connector and the end of the beam, and the inner member is fixed to the connector by tightening the reinforcing fastener. In addition, the reinforcement main body that has received the tightening force by the reinforcing fastener pushes up the end portions of both beams so that the inner side surfaces of the beams are brought into close contact with the surface of the inner member. Therefore, the end portion of the beam is sandwiched and restrained by the lower surface of the inner member and the main body of the reinforcing member, thereby suppressing the play of the end portion of the beam.

  According to the present invention, a beam replacement operation can be easily performed in a guard pipe using an inner sleeve.

  In the present invention, the shape of the inner sleeve (inner member) is devised, and the inner sleeve housed inside the beam is moved from the outside of the beam in the longitudinal direction of the beam, thereby attaching and removing the beam. It is.

  Hereinafter, a guard pipe replacement method and a guard pipe according to the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a front view of the guard pipe 100 for explaining the guard pipe 100 of the first embodiment, and FIG. 2 is a cross-sectional view of the guard pipe 100 cut at the position XX in FIG. As shown in FIG. 1, the guard pipe 100 of the present embodiment includes a plurality of support columns 2, a beam 5 that is indirectly supported in a substantially horizontal state by the support columns 2, and the beam 5 indirectly connected to the support column 2. And a connecting device for attaching to the device.

  As shown in FIG. 1 and FIG. 2, the support columns 2 are arranged so as to form a row at intervals from each other. The row | line | column of the support | pillar 2 is arrange | positioned so that the boundary line which separates a road may be met. The support column 2 has its upper end projecting substantially perpendicularly to the ground with its lower end buried in the ground. As shown in FIG. 2, the column 2 includes a column main body 21 having a substantially cylindrical shape, and a cap 22 provided so as to cover the upper end of the column main body 21. Both the column main body 21 and the cap 22 are steel members. The uppermost beam 5 is indirectly fixed to the cap 22, and the lower beam 5 is indirectly fixed to the column main body 21.

  The beam 5 is indirectly supported by the support column 21 via a coupling device in a substantially horizontal state. Each beam 5 is a steel member having a hollow long shape. Bolt holes 5a1, 5a2, 5a3, 5a4, 5b1, 5b2, 5b3, 5b4 for inserting bolts are formed at both ends of each beam 5. Among these bolt holes, the bolt holes 5a1, 5a2, 5a3, 5a4 are arranged in the upper part of the beam 5 along the longitudinal direction of the beam, the bolt hole 5b1 is located at a position facing the bolt hole 5a1, and the bolt hole 5b2 is The bolt hole 5b3 is disposed at a position facing the bolt hole 5a2, the bolt hole 5b3 is disposed at a position facing the bolt hole 5a3, and the bolt hole 5b4 is disposed at a position facing the bolt hole 5a4.

  In the following description, reference numeral 51 is given to a beam (specific beam) provided in an intermediate portion of the guard pipe 100 among the beams 5, and the beam 51 to be replaced is connected to the connector 3. Next, a description will be given with reference to 52 adjacent beams (adjacent beams).

  The connecting device is used to support the beams 51 and 52 in a substantially horizontal state while indirectly connecting the connectors 3 for indirectly attaching the inner sleeve 4 to the support column 2 and the ends of the beams 51 and 52. An inner sleeve (inner member) 4, a fastener 6 for fixing the inner sleeve 4 to a predetermined position in the longitudinal direction of the beams 51 and 52, and a reinforcing tool 8 for fixing the inner sleeve 4 to the connector 3. Including.

  Two connectors 3 are attached to the side of each column 2. The connector 3 is a hollow steel member. The connector 3 is formed with a hole (not shown) for allowing the bolt 30 to pass through at one location. The bolt 30 is inserted into this hole, and the bolt 30 is screwed into the column main body 21 or the cap 22. The connector 3 is fixed to the column 2 by screwing (not shown). In addition, the connector 3 is formed with a bolt hole 32a for attaching the reinforcing member 8 to the lower portion thereof.

  FIG. 3 is a perspective view for explaining the inner sleeve 4 used in the guard pipe of the first embodiment. As shown in FIG. 4, the inner sleeve 4 has an inner sleeve body 41 for securing the strength of the connecting portion of the beam 51 and the beam 52, and a protruding portion for hooking the wire (inner member operation wire) W 42. In the state of use, the inner sleeve 4 is held substantially horizontally by the connector 3 with both ends protruding from the connector 3.

  The inner sleeve body 41 has a hollow shape whose width is longer than the outer diameter. The inner sleeve main body 41 has one flat surface portion 41a formed on the outer surface thereof so as to extend along the longitudinal direction, and a portion other than the flat surface portion 41a, which is along the inner peripheral surface of the beam 5 described above. And a peripheral portion 41b having a shape. Further, the inner sleeve body 41 is penetrated by a fastener 6 which will be described later, and bolt holes 4a1, 4b1, 4a2, 4b2, 4a3 for positioning the inner sleeve 4 at predetermined positions at the ends of the beams 51, 52. 4b3, 4a4, 4b4 and a bolt hole 4b5 for fixing the inner sleeve 4 to the connector 3 are formed. Among these bolt holes, the bolt holes 4a1, 4a2, 4a3, 4a4 are arranged along the longitudinal direction of the flat portion 41a, the bolt hole 4b1 is located at a position facing the bolt hole 4a1, and the bolt hole 4b2 is the bolt hole. The bolt hole 4b3 is disposed at a position facing the bolt hole 4a3, and the bolt hole 4b4 is disposed at a position facing the bolt hole 4a4.

  An engaging portion 4c for engaging the tip of a flathead screwdriver (inner operation tool) D is installed on the flat surface portion 41a in the longitudinal direction of the inner sleeve 4 (the inner sleeve 4 is disposed at a predetermined position of the connector 3). In the state, the inner sleeves 4 are arranged along the protruding direction from the connector 3. The engaging portion 4 c is composed of a plurality of grooves formed so as to extend in a direction orthogonal to the longitudinal direction of the inner sleeve 4.

  The inner sleeve 4 is arranged on the inner side of the end of the beam 51, 52 so that the flat portion 41a faces the bolt holes 5a1, 5a2, 5a3, 5a4 formed in the upper part of the beam 51, 52 in use. Can be stored. Thereby, the tip of the minus driver D is inserted from the bolt holes 5a1, 5a2, 5a3, 5a4 formed in the upper parts of the beams 51, 52, and engaged with the engaging portion 4c formed in the inner sleeve body 41, The inner sleeve 4 can be moved in the axial direction of the beams 51 and 52. In addition, by using the bolt holes 5a1, 5a2, 5a3, 5a4 formed in the beams 51, 52 also as insertion holes for the minus driver D, the inner sleeve 4 accommodated in the beams 51, 52 is moved. It is not necessary to form the openings to be used in the beams 51 and 52 anew. Further, by fastening a fastener 6 which will be described later, the inner sleeve 4 is fixed at a predetermined position in the longitudinal direction of the beam 5, and the fastener 6 functions as a plug for closing these bolt holes. It is possible to prevent water and the like from entering the inside, and to suppress beam corrosion.

  The protruding portion 42 is provided integrally with the flat portion 41 a of the inner sleeve main body 41 and is formed so as to protrude from one end of the inner sleeve main body 41 in the longitudinal direction. As another method of moving the inner sleeve 4 within the beam 51, the connector 3 and the beam 52, one end of the wire W is hooked on the protruding portion 42, and the other end of the wire W is connected to the protruding portion 42. The inner sleeve 4 is moved by pulling the other end of the wire W while being led out in the direction opposite to the protruding direction. By forming such a protrusion 42 integrally with the inner sleeve main body 41, the wire W can be easily engaged with the inner sleeve 4.

  Hereinafter, the inner sleeve 4 is inserted into one end side of the beam 51 to be replaced and is not fixed to the connector 3. Member) 4 and the inner sleeve 4 inserted into the other end side of the beam 51, and the inner sleeve 4 fixed to the connector 3 is described as a second inner sleeve (second inner member) 4. To do.

  The fastener 6 is provided from the outside of the beams 51 and 52 so as to penetrate the inner sleeve 4 accommodated in the beams 51 and 52 in the transverse direction of the beams 51 and 52. The fastener 6 includes a bolt 61 and a nut 62. The bolt 61 is configured such that the inner sleeve 4 is disposed at a predetermined position in the longitudinal direction of the beams 51 and 52, and a predetermined bolt hole formed in the beam and an inner are formed. When predetermined bolt holes formed in the sleeve communicate with each other, they are inserted into the respective communication holes and fixed by nuts 62.

  The reinforcing tool 8 is provided in close contact with the outer lower surface of the connector 3. The reinforcing tool 8 includes an end of two beams provided at both ends of the connector 3, a washer (reinforcing tool main body) 81 for making the height of the connector 3 substantially the same, and a washer 81 fastened to the connector 3. And a bolt (reinforcing fastener) 82 for this purpose. The washer 81 is shaped so as to straddle the ends of the two beams 51 and 52 provided at both ends of the connector 3 while being attached to the lower portion of the connector 3. A hole (not shown) for inserting the bolt 82 is formed in the intermediate portion of the washer 81.

  The bolt 82 is inserted into a hole formed in the washer 81 and a bolt hole 32 a formed in the lower surface of the connector 3 and screwed into a bolt hole 4 b 5 formed in the inner sleeve 4. The ends of the beams 51 and 52 are supported so as to hang from both ends of the inner sleeve 4. When the bolt 82 is tightened by using the washer 81 and the bolt 82, the washer 81 and the beam 51 are combined with the beam 51. The end of 52 is lifted slightly upward. Accordingly, the ends of the beams 51 and 52 and the height of the connector 3 are substantially the same, the inner surfaces of the beams 51 and 52 and the lower surface of the inner sleeve 4 are in close contact, and the ends of the beams 51 and 52 are connected to the inner sleeve. 4 and the washer 81, so that the beams 51 and 52 can be prevented from rattling.

  A method of replacing the beam of the guard pipe 100 according to the present embodiment with this configuration will be described below. The beam replacement method in the guard pipe of the present embodiment includes (1) a step of removing the fastener 6 and the reinforcing member 8, (2) a step of removing the beam 51 by moving the first inner sleeve 4, and (3 ) Including an insertion step of inserting the first inner sleeve 4 into one end A of the replacement beam 51, (4) a step of attaching the replacement beam 51, and (5) a step of fastening the fastener 6 and the reinforcing tool 8. . Below, each process is demonstrated in detail.

(1) Step of removing the fastener 6 First, the operator is adjacent to the fastener 6 fastened to both ends of the beam 51 to be replaced of the guard pipe 100 and one end A of the beam 51 via the connector 3. The fitting 6 is fastened to the end close to the beam 51 and the reinforcing tool 8 provided at the lower end of the connector 3 provided on the one end A side of the beam 51 is removed.

(2) Step of moving the first inner sleeve 4 and removing the beam 51 Next, the operator moves the first inner sleeve 4 provided on the end A side of the beam 51 in the axial direction of the beams 51 and 52. . FIG. 4 is a cross-sectional view for explaining a method of moving the first inner sleeve 4 within the beams 51 and 52. As shown in FIG. 4, the operator attaches the tip of the flathead screwdriver D to any one of bolt holes 51 a 1, 51 a 2, 51 a 3, 51 a 4 formed in the beams 51, 52, in this embodiment, to the beam 51. Insert into the formed bolt hole 5a3. Then, the operator engages the tip of the flathead screwdriver D with one groove of the engaging portion 4 c formed on the flat surface portion 41 a of the inner sleeve main body 41. The operator tilts the gripping portion of the minus driver D protruding outside the beam 51 in the axial direction of the beam 51 in a state where the tip of the minus driver D is engaged so as to press against the engaging portion 4 c. As a result, the first inner sleeve 4 moves slightly in the beam 51. By sequentially repeating this operation for each 4c, the first inner sleeve 4 can be moved in the axial direction to the beam 51 side.

  When the entire first inner sleeve 4 moves into the beam 51, the first inner sleeve 4 and the connector 3 are disengaged, and the indirect connection with the column 2 is released at the end A of the beam 51. The Further, the operator moves the end B of the beam 51 in a direction away from the second inner sleeve 4 to disengage the end B of the beam 51 from the second inner sleeve 4, thereby completely supporting the beam 51. Remove from 2.

  Thus, in the beam replacement operation, when the beam removal operation is performed by moving the first inner sleeve 4, the beam 51 that is the replacement target is not cut and is the replacement target. The existing beam 51 can be removed from the column 2.

(3) Insertion Step of Inserting First Inner Sleeve 4 into One End of Replacement Beam 51 Next, an operator prepares a replacement beam 51 to be newly attached to a portion from which the beam 51 has been removed. First, the operator inserts the first inner sleeve 4 removed together with the beam 51 in the step (2) into the end A of the replacement beam 51.

  At this time, the first inner sleeve 4 is engaged with an annular second annular portion W2 provided at one end of the wire W at the protruding portion 42. Then, the operator leads the first ring portion W1 provided at the other end of the wire W to the outside of the first inner sleeve 4 from the bolt hole 4a2 through the inside of the first inner sleeve 4 (that is, In the state where the other end W1 of the wire W is led out in the direction opposite to the protruding direction of the protruding portion 42), the protruding portion 42 side becomes the back side of the replacement beam 51 (that is, the first end of the wire W). The first inner sleeve 4 is inserted into the end A of the replacement beam 51 so that the one ring portion W1 is on the end A side of the replacement beam 51.

(4) Step of attaching replacement beam 51 Next, the operator attaches the replacement beam 51 into which the first inner sleeve 4 is inserted in the step (3) to the two columns 2.

  FIG. 5 is a schematic diagram for explaining a process of attaching the replacement beam 51. FIG. 6 is a perspective view for explaining a state in which the replacement beam 51 having the first inner sleeve 4 inserted therein is brought into contact with the connector 3. FIG. 7 is a cross-sectional view for explaining a method of moving and aligning the first inner sleeve 4 within the beams 51 and 52 when the replacement beam 51 is attached.

  First, as shown in FIG. 5, the operator fits the end B of the replacement beam 51 into the second inner sleeve 4 that remains fixed to the column 2. Next, the operator inserts the first ring portion W1 of the wire W led out from the end A side where the first inner sleeve 4 is inserted into the connector 3. Further, the first ring portion W1 of the wire W is fed to the inside of the adjacent beam 52, and the bolt hole 5a2 formed at the end of the adjacent beam 52 or the bolt hole 5a1 to the outside of the adjacent beam 52 is connected to the wire W. The first ring portion W1 is derived (see FIGS. 5 and 6). This Embodiment demonstrates the case where the 1st ring part W1 of the wire W is derived | led-out from the bolt hole 5a2.

  Then, the operator holds the end A of the replacement beam 51 at a position facing the side edge of the connector 3, and in this state, pulls the first ring portion W1 of the wire W and pulls the first inner sleeve 4 toward the connector 3 side. (I.e., adjacent beam 52 side) (see FIG. 7). Accordingly, the first inner sleeve 4 moves to a position where the bolt hole 4a2 from which the wire W of the first inner sleeve 4 is led out and the bolt hole 5a2 from which the wire W of the adjacent beam 52 is led to substantially face each other. . Accordingly, the first inner sleeve 4 is supported in a state in which both ends thereof are protruded from the connector 3 (that is, a state in which the first inner sleeve 4 is movable in that direction in a posture extending in a direction substantially orthogonal to the support column 2). Further, one end of the first inner sleeve 4 fits inside the end A side of the replacement beam 51, and the other end of the first inner sleeve 4 fits inside the end of the adjacent beam 52 so that two Supports the end of the beam.

  When removing the wire W from the first inner sleeve 4, the operator pushes the first ring portion W <b> 1 of the wire W in the direction opposite to the moving direction of the first inner sleeve 4 (that is, the direction of the connector 3). Thus, the second ring portion W2 engaged with the protruding portion 42 is removed from the protruding portion 42, and the wire W is pulled out from the inside of the beam 51, the connector 3, and the beam 52 to the outside.

  Note that the operation for returning the position of the first inner sleeve 4 in this way is not limited to using the wire W. For example, in order to match the position of the bolt hole formed in the first inner sleeve 4 with the position of the bolt hole formed in the beam 5, a minus driver D is inserted from the bolt hole formed in the beam, By engaging the end portion of D with the engaging portion 4c formed on the first inner sleeve 4 and moving the first inner sleeve 4 little by little as in the step (2), the first inner sleeve 4 The position of may be finely adjusted.

(5) Step of Fastening Fastener 6 and Reinforcement Tool 8 Finally, the operator attaches the fastener 6 to both ends of the replacement beam 51 and the end of the beam 52 adjacent to the end A side of the replacement beam 51. Fastening and attaching the reinforcing tool 8 to the lower part of the connector 3 complete the beam replacement operation.

  According to the above embodiment, the first inner sleeve 4 accommodated inside the beams 51, 52 is moved from the outside of the beams 51, 52 in the longitudinal direction of the beams 51, 52. As a result, when the engagement between the end of the beam 51 and the portion of the first inner sleeve 4 protruding from the column 2 and the connector 3 is released, the beam 51 is removed from the column, and the end of the beam 51 is also removed. When the portion protruding from the column 2 of the first inner sleeve 4 and the connector 3 are engaged, the beam 51 is attached to the column 2. In other words, in the present embodiment, only the inner sleeve 4 provided on one of the two columns 21 of the two columns supporting both ends of the beam 51 to be replaced is moved to be replaced. The beam 51 is removed or attached. Therefore, when replacing the beams 51 and 52 located in the middle part of the guard pipe 100, the beam 51 or the beam 52 to be replaced located in the middle part from the beam located in the end part of the guard pipe 100. No need to remove all the beams. Therefore, even with the guard pipe using the inner sleeve 4, the beam replacement operation can be easily performed.

  In the above-described embodiment, the mode in which the inner sleeve 4 is moved inside the beam and the beam 5 is removed has been described. However, the present invention is not limited to this, and the beam may be cut and removed. .

  In the above-described embodiment, the form in which the protruding portion 42 is formed only at one end of the inner sleeve main body 41 has been described. However, the present invention is not limited to this, and the protruding portion 42 may be The form currently formed in the both ends of the sleeve main body 41 may be sufficient.

  Moreover, although the said embodiment demonstrated the case where the beam 51 was removed by moving the 1st inner sleeve 4 to the beam 51 side to be replaced, this invention is not limited to this. Alternatively, the beam 51 may be removed by moving the first inner sleeve 4 to the adjacent beam 52 side.

  In the above embodiment, the first inner sleeve 4 is inserted into the replacement beam 51 in the insertion step, and the first inner sleeve 4 is moved to the adjacent beam 52 side in the attachment step. However, the present invention is not limited to this, and the first inner sleeve 4 is inserted into the adjacent beam 52 in the insertion step, and the first inner sleeve 4 is moved toward the replacement beam 51 in the attachment step. It may be a form to be made.

FIG. 3 is a front view for explaining the guard pipe of the first embodiment. It is sectional drawing of the guard pipe cut | disconnected in the XX position of FIG. 3 is a perspective view for explaining an inner sleeve used in the guard pipe of Embodiment 1. FIG. It is sectional drawing for demonstrating the method to move a 1st inner sleeve within a beam. It is the schematic for demonstrating the process of attaching the beam for exchange. It is a perspective view for demonstrating the state which contact | abuts the exchange beam in which the 1st inner sleeve was inserted in the connector. It is sectional drawing for demonstrating the method of moving and aligning a 1st inner sleeve within a beam, when attaching the beam for replacement | exchange. It is a front view for demonstrating the conventional guard pipe.

Explanation of symbols

2, 21 Prop 3, 31, 32 Connector 4 Inner sleeve (inner member)
41 Projection part 4c Engagement part 5 Beam 51 Beam to be replaced (specific beam), replacement beam 52 Adjacent beam 5a1, 5a2, 5a3, 5a4 Bolt hole (through hole)
6 Fastener 8 Reinforcement 81 Washer (Reinforcement body)
82 bolts (reinforcing fasteners)
100 guard pipe W wire (inner member operation wire)
D Slotted screwdriver (inner member operation tool)

Claims (11)

A plurality of columns arranged in rows at intervals, a plurality of beams that are tubular and arranged between adjacent columns, and the ends of each beam are connected to the corresponding columns And a connector attached to a side portion of each column, and held by the connector so as to be movable in the direction extending in a direction substantially orthogonal to each column. And an inner member that protrudes from the connector to both sides in the substantially orthogonal direction and is inserted into the end of the corresponding beam, and an end of the beam and an inner member that is inserted into the end are fastened. A method for replacing a particular beam of a guard pipe having a fastener for:
A removal step of removing the specific beam from the first inner member and the second inner member, which are respectively fitted to both ends of the beam;
An insertion step of removing the first inner member from the beam adjacent to the connector and the specific beam, and inserting the first inner member into one end of a newly introduced replacement beam;
The end where the first inner member is inserted in the state where the second inner member is inserted into the end opposite to the end where the first inner member is inserted in the replacement beam. Is held at a position facing the corresponding connector, and the first inner member is moved to the connector side at that position, so that both end portions of the first inner member protrude from the connector and are used for the replacement. Beam replacement in a guard pipe including a step of inserting the first inner member into a beam inserted into the beam and an adjacent beam, and fastening both ends of the first inner member to the beam into which the both ends are inserted. Method. A plurality of columns arranged in rows at intervals, a plurality of beams that are tubular and arranged between adjacent columns, and the ends of each beam are connected to the corresponding columns And a connector attached to a side portion of each column, and held by the connector so as to be movable in the direction extending in a direction substantially orthogonal to each column. And an inner member that protrudes from the connector to both sides in the substantially orthogonal direction and is inserted into the end of the corresponding beam, and an end of the beam and an inner member that is inserted into the end are fastened. A method for replacing a particular beam of a guard pipe having a fastener for:
A removal step of removing the specific beam from the first inner member and the second inner member, which are respectively fitted to both ends of the beam;
An insertion step of removing the fastening between the first inner member and the specific beam and inserting the first inner member further into the adjacent beam;
With the second inner member inserted into one end of the exchange beam, the other end of the exchange beam is held at a position facing the corresponding connector, and the adjacent one is located at that position. By returning the first inner member from the beam to the connector side, both ends of the first inner member protrude from the connector so as to be inserted into the replacement beam and the adjacent beam. And a beam replacing method in the guard pipe, including an attaching step of fastening both ends of the first inner member to the beams into which the both ends are respectively inserted. The method for replacing a beam in a guard pipe according to claim 1 or 2,
In the inserting step, after connecting one end of the inner member operating wire to the first inner member, the first inner member is inserted into an end of the replacement beam or the adjacent beam,
In the attaching step, the beam replacement method in the guard pipe, wherein the first inner member is moved in the axial direction of the beam by pulling the inner member operating wire from the outer side of the beam. The method of replacing a beam in a guard pipe according to claim 3,
In the attaching step, the inner member operating wire is provided on the adjacent beam or the replacement beam so as to insert a bolt for fastening the adjacent beam or the replacement beam and the first inner member. A beam replacement method in a guard pipe, wherein the beam is led out to the outside through a formed through hole. The beam replacement method in the guard pipe according to claim 3 or 4,
In the inserting step, one end of the inner member operating wire is hooked on a protruding portion formed at an end portion of the first inner member, and the first inner member is exchanged from the protruding portion side. A beam replacement method in a guard pipe, wherein the beam is inserted into an end of a beam for use or an adjacent beam. The method for replacing a beam in a guard pipe according to claim 1 or 2,
At both ends of each beam, a through-hole into which the tip of the inner member operation tool can be inserted from the outside to the inside is provided, and the surface of each inner member is arranged in a direction parallel to the protruding direction, A plurality of engaging portions that are respectively engageable with the inner member operating tool are formed,
In the attaching step, the inner member operating tool is inserted into the replacement beam or the adjacent beam while inserting the inner member operating tool from the through hole provided in the replacement beam or the adjacent beam. By repeating the operation of engaging the appropriate engaging portion of the first inner member and moving the first inner member in the axial direction of the beam with respect to each engaging portion, A beam replacement method for a guard pipe, wherein the first inner member is moved to a position where both end portions protrude from the connector to both sides thereof. In the method of replacing the beam in the guard pipe according to any one of claims 1 to 6,
At both ends of each beam, a through hole for inserting a tip of an inner member operation tool from the outside to the inside is provided, and the surface of each inner member is arranged in a direction parallel to the protruding direction, A plurality of engaging portions that are respectively engageable with the inner member operating tool are formed,
In the removing step, the inner member operating tool is inserted into the specific beam or the adjacent beam while inserting the inner member operating tool from the through-hole provided in the specific beam or the adjacent beam. Removing the first inner member from the particular beam by engaging the appropriate engagement portion of the first inner member and moving the first inner member in the axial direction of the beam. A beam replacement method in a guard pipe. In the method of replacing the beam in the guard pipe according to any one of claims 1 to 6,
In the removing step, the beam is removed from the first inner member and the second inner member by cutting the specific beam in the middle thereof. A plurality of columns arranged in a row at intervals, a plurality of beams arranged in a tubular shape between adjacent columns, and the ends of each beam are connected to the corresponding columns A guard pipe with a connecting device for
The coupling device is held by the connector attached to a side portion of each column, and is movable by the connector in a posture extending in a direction substantially orthogonal to the columns, and from the connector to the approximately An inner member that protrudes on both sides in the orthogonal direction and is inserted into the end of the corresponding beam, and a fastener for fastening the end of the beam and the inner member inserted into the end,
At least one of the longitudinal end portions of the inner member is provided with a protrusion that can be connected to an inner member operation wire for moving the inner member in the axial direction within the beam by an external operation. Guard pipe characterized by that. A plurality of columns arranged in a row at intervals, a plurality of beams arranged in a tubular shape between adjacent columns, and the ends of each beam are connected to the corresponding columns A guard pipe with a connecting device for
The coupling device is held by the connector attached to a side portion of each column, and is movable by the connector in a posture extending in a direction substantially orthogonal to the columns, and from the connector to the approximately An inner member that protrudes on both sides in the orthogonal direction and is inserted into the end of the corresponding beam, and a fastener for fastening the end of the beam and the inner member inserted into the end,
A through hole through which the fastener can be inserted is provided at an end of each beam, and an inner member operation tool inserted into the inside of each beam from the through hole is provided on the surface of the inner member. A guard pipe, wherein engaging portions that can be engaged are arranged in a longitudinal direction of the inner member. The guard pipe according to claim 9 or 10,
A reinforcing tool for bringing both end portions of the inner member into close contact with the inner surface of the beam into which these end portions are respectively inserted;
The reinforcing member is fastened to the inner member through a through hole provided in the connector, and a reinforcing member main body having a shape straddling the connector and beam ends on both sides thereof. A guard pipe having a reinforcing fastener.

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