JP3997276B2 - Protective fence - Google Patents

Description

  The present invention relates to a guard fence for a car stop provided on an elevated road or the like.

  As shown in FIG. 9, an elevated road 20 such as an expressway is provided with a tall side wall 21 that serves as a car stop. In the case of the illustrated RC floor bridge, the side wall 21 is normally set to a height H of 1 m.

  In this way, if there are tall side walls on both sides of the road, the surrounding scenery is obstructed, and there is also a concern of giving the driver a psychological pressure.

  Therefore, in areas where sound insulation is not required, it is considered to reduce the height H of the side wall 21 and to provide a guard fence (rail) for stopping the car on the side wall 21, and such a structure is also recognized for expressways. I put it out.

  10 to 12 are protective fences that are studied and designed for highways.

  The protective fence 1 has support columns 2 standing at predetermined intervals on a side wall 21 having a height of about 60 cm, and receives and supports a guard pipe 4 with a pipe receiver 3 provided at the upper end of the support column 2. The guard pipe 4 uses a steel pipe or the like, and adjacent pipes are connected in the longitudinal direction at a support portion by the support column 2.

  In the illustrated guard fence 1, an inner sleeve 5 ′ serving as a joint is inserted into the abutting end of the guard pipe 4, and the end of the guard pipe 4 adjacent to the inner sleeve 5 ′ is attached to a pipe receiver 3 provided on a column 2. The guard pipe is connected by a method of fixing with bolts 6.

  The structure shown in FIGS. 10 to 12 in which a part of the side wall 21 is replaced with a guard fence 1 called a railing has a wider view, no deterioration of the landscape, no psychological pressure on the driver, and light weight on the viaduct road. It will be possible to reduce costs and cost.

  However, in the case of the guard fence 1 studied so far, when the guard pipe 4 is damaged due to a car hitting, the damaged pipe 4 can be cut and disassembled, but the new guard pipe to be replaced is If all the guard pipes 4 from one side of the balustrade to the damaged part are not removed, the inner sleeves on both sides become obstructed and cannot be attached to the original state. Therefore, there is a problem that unnecessary work increases and time is required for repair. .

  In addition, since the guard pipe 4 has a structure using a round pipe, it is necessary to use a pipe having a diameter that is somewhat thick, which increases the material cost and makes it difficult to further reduce the weight.

  This invention makes it a subject to eliminate this malfunction.

In order to solve the above-described problems, in the present invention, a guard pipe is provided horizontally between support columns standing at a predetermined interval, and the guard pipe is connected in a longitudinal direction at a support portion by the support columns, and the connection The joint is inserted into the connecting end of the adjacent guard pipes, and the joint and the guard pipe end are fixed to the pipe receiver provided at the upper part of the column with bolts, and between the guard pipes connected to each other. In the protective fence provided with a gap for joint operation, a notch groove that enters the pipe longitudinal direction is provided at the end of the guard pipe, and a joint operation tool that is inserted into the pipe from the notch groove on the outer periphery of the joint. A plurality of locking portions for locking are provided at intervals in the longitudinal direction of the pipe to form a protective fence.

  The joint used to connect the guard pipe having an elliptical cross section is composed of a base plate that is horizontally inserted into the center of the guard pipe, a plurality of rib plates that are erected on the upper and lower surfaces of the base plate, and a rib plate on the lower surface of the base plate. It is preferable that each of the base plate and the rib plate has a size that fits and fits the guard pipe, and a screw hole into which a fixing bolt is screwed is provided in the mounting plate.

  A base plate that is inserted horizontally into the center of the guard pipe, and both ends are fixed to the top and bottom surfaces of the base plate. Both sides stand up in end view, and the middle part that extends from both sides stretches in the middle of the width direction. It consists of a bridge-shaped auxiliary frame that has a U-shaped bend for absorption and is bent so as to form a chevron, and each base plate and auxiliary frame are sized to fit almost inside the guard pipe. It is more preferable to employ a joint having a structure in which a screw hole for screwing a fixing bolt is provided in the auxiliary frame. The bridge-like auxiliary frame of this joint can be replaced with a shape in which both side portions stand in an end view and the intermediate portion connected to both side portions is bent so as to substantially follow the inner surface of the guard pipe. These auxiliary frames are preferably formed of a spring plate.

  Further, it is preferable to cover the gap created between the guard pipes by providing a removable cover plate.

  In addition, the protective fence according to the present invention is more preferable when the second protective fence having a high height is integrally provided on the outside.

  The guard fence of the present invention is provided with a gap that exposes a part of the joint inserted in the pipe between the guard pipes connected to each other, so that the exposed joint can be operated from the outside and inserted and removed. This makes it possible to replace a damaged guard pipe without removing other guard pipes, and simplifies the replacement of damaged guard pipes.

  A notch groove is provided at the end of the guard pipe, and further, a locking portion for locking the joint operation tool inserted into the pipe from the notch groove on the outer periphery of the joint is spaced in the longitudinal direction of the pipe. In the case where a plurality of openings are provided, a substantial gap for joint operation is widened by the notch groove, and a locking portion for locking the operation tool is provided in the joint, so the gap provided between the guard pipes is small. The joint can be inserted and removed without any trouble.

  In addition, a guard pipe that functions as a vehicle stop is required to have a high strength against a lateral load, but is not required to have a high strength against a vertical load (a load in a vertical direction). The use of a guard pipe with an elliptical cross section can ensure the required strength for lateral loads with a pipe of a smaller size (a pipe with a shorter circumference) than the round pipe, and the material cost is higher than the protective fence using a round pipe. And the weight of the guard pipe can be further reduced.

  It should be noted that the joint preferred in the above, that is, the joint comprising the base plate and the two auxiliary frames, has a strength of the pipe connection portion as compared with the joint in which the base plate serves as a reinforcing material against the lateral load and an elliptical inner sleeve is used as the joint. Will increase. The joint consisting of the base plate, rib plate, and mounting plate also has a pipe connection part compared to the base plate that serves as a reinforcement for lateral loads and the rib plate serves as a reinforcement for longitudinal loads, and an elliptical inner sleeve is used as a joint. Increases the strength.

  Moreover, these joints are easy to manufacture and easy to ensure compatibility with the guard pipe. In the former joint, the auxiliary frame is formed of a springy plate material and can be elastically deformed. When the fitting to the guard pipe is poor, the auxiliary frame can be elastically deformed to eliminate the poor fitting. . In addition, if the fitting of the latter joint is poor with respect to the guard pipe, the size can be easily corrected by scraping the edges of the base plate or the rib plate.

  In addition, the cover plate which covers the clearance gap between guard pipes improves the appearance of a pipe connection part.

  In addition, the second protective fence prevents the cargo of the vehicle from falling over the guard pipe over the guard pipe, thereby improving the reliability of the protection.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. The illustrated guard fence A is a fence having a composite structure, and includes a first guard fence 1 serving as a car stop and a second guard fence 10 having a high length for preventing a vehicle load or the like from falling.

  The first protective fence 1 is composed of a support column 2 standing on a side of an elevated road or the like, a guard pipe 4 made of a steel pipe having an elliptical cross section extending horizontally between the support columns, and the guard pipe 4 A joint 5 to be inserted into the end, a fixing bolt 6 and a cover plate 7 are included.

  The second protective fence 10 includes an outer frame 11 and a metal net 12 stretched inside the frame. The second guard fence 10 is fixed to the support column 2 using a connecting fitting 13 shown in FIG. 2 and is installed outside the first guard fence 1.

  The support column 2 has a pipe receiver 3 at the upper portion, and the pipe receiver 3 receives and supports the end of the guard pipe 4. The guard pipe 4 is in a posture in which the long axis of the ellipse is horizontally oriented, and the joint 5 is detachably inserted into the end, and a gap g is formed between the two pipes connected to each other (see FIGS. 1 and 3). Cause the connection ends to face each other.

  The end of the guard pipe 4 is provided with a notch groove 4a that enters the longitudinal direction of the pipe (see FIG. 6). The notch groove 4a is sized so that a joint operating tool such as a screwdriver can be inserted, and increases the substantial dimension of the inter-pipe gap g. The cutout groove 4a is preferably provided at a position where it is difficult to see from the outside and where rainwater or the like is not easily applied, for example, at the lower portion of the guard pipe 4.

  As shown in FIG. 5 (a), the joint 5 includes a base plate 5a and auxiliary frames 5b that are provided by welding both side ends to the upper and lower surfaces of the base plate 5a. The auxiliary frame 5b is as shown in FIGS. 4 to 6, that is, both side portions stand up in an end view, and an intermediate portion connected to both side portions is a U-shaped bent portion for absorbing expansion and contraction in the middle in the width direction (the center portion in the figure). It is preferable to have a bridge shape by being bent so as to form a chevron with 5c, but it has excellent absorbability of dimensional errors. However, as shown in FIG. The intermediate portion that is continuous may have a shape that is bent so as to substantially follow the inner surface of the guard pipe 4.

  In the illustrated joint 5, the base plate 5a is formed of a stainless steel plate, and the auxiliary frame 5b is formed of a spring metal plate, and the auxiliary frame 5b can be elastically deformed to change the height of the frame. The joint 5 is sized so that the base plate 5a and the auxiliary frame 5b are fitted to the guard pipe 4 so as to fit. A plurality of U-shaped bent portions 5c provided on the auxiliary frame 5b may be provided. The auxiliary frame 5b is provided with a plurality of screw holes into which the bolts 6 are screwed. In the illustrated joint 5, the screw hole is generated by welding a commercially available nut 5 d (see FIG. 4) to the inner surface of the auxiliary frame 5 b and does not require tapping. Bolt holes corresponding to the nuts 5d are formed in the auxiliary frame 5b.

  Further, the auxiliary frame 5b is provided with a locking portion 5g (see FIGS. 4 to 6) for locking an operation tool such as a driver at a position corresponding to the above-described notch groove 4a. A plurality are provided. The locking portion 5g for locking the operating tool may be a through hole shown in FIG. 5B, a recess shown in FIG. When an operation tool such as a screwdriver inserted into the elliptical guard pipe 4 from the position of the notch groove 4a is engaged with the engagement portion 5g and the joint 5 is moved, the joint 5 can be easily inserted and removed.

  As shown in FIG. 7, the joint 5 is provided integrally with a base plate 5 a, a rib plate 5 e erected by welding a plurality of each of the base plate on the upper and lower surfaces of the base plate, and a rib plate on the lower surface side. The mounting plate 5f may be used. A screw hole into which the bolt 6 is screwed is provided in the mounting plate 5f. In the illustrated joint 5, the screw hole is formed by welding a commercially available nut 5 d (see FIG. 4) to the mounting plate 5 f, and therefore this also does not require tapping.

  Even when the joint 5 of FIG. 7 is adopted, the notch groove 4a shown in FIG. 6 is provided at the end of the elliptical guard pipe 4, and a locking part 5g corresponding to the notch groove 4a is provided on the joint 5. It is preferable to provide a plurality of them at appropriate intervals in the longitudinal direction of the pipe.

  The pipe receiver 3 and the guard pipe 4 are provided with bolt holes 8 and 9 at positions corresponding to the screw holes (nuts 5d) provided in the joint 5, and the bolts 6 are inserted into the holes from the outside. Then, the oval guard pipe 4 and the joint 5 are fixed to the pipe receiver 3.

  The cover plate 7 is fixed on the support column 2 with bolts, and covers the exposed portion of the joint 5 by covering the cover portion 7a between adjacent guard pipes. The cover plate 7 improves the appearance of the connecting portion, but is not an essential element.

  The guard fence A constructed in this way is damaged by operating the joint 5 at the position of the gap g by removing the cover plates 7 on both sides of the guard pipe 4 and removing the bolts 6 if any guard pipe is damaged. The joint 5 is removed from the guard pipe 4 that has been removed. Then, the damaged guard pipe is replaced with a new guard pipe, and the replacement operation is completed through a procedure reverse to the above.

  If the gap g is larger than the insertion length of the joint 5 with respect to the guard pipe 4, the guard pipe 4 can be removed without moving the joint 5 using the gap. If the gap g is made smaller than the joint insertion length with respect to the guard pipe and the method of suppressing the deterioration of the external appearance is adopted, a space restriction occurs and it becomes difficult to insert and remove the joint 5. The notch groove 4a and the locking portion 5g described above are effective at this time, and it is possible to easily and reliably insert and remove the joint 5 even if the gap g is reduced.

  Even in the structure in which the gaps g are provided in every other connecting part and the connecting parts where the guard pipes are abutted without gaps and the connecting parts with the gaps g are alternately arranged, if the guard pipe is shifted to the side where the gaps g are provided, there is no gap. It is possible to operate the joint of the connecting portion where there is no gap by generating a gap at the position, and the damaged guard pipe can be replaced without removing another healthy guard pipe. This structure has an advantage that the number of cover plates used and the time required for attaching and detaching the plates can be halved.

  The case where the preferred guard pipe having an elliptical cross section has been described above as an example, but the guard pipe to be used may be a round pipe as shown in FIG. 14, and the joint 5 in this case has a circular cross section. The inner sleeve can be used.

Front view of guard pipe connection part of protective fence of embodiment Sectional view along the line II-II in FIG. Plan view of guard pipe connection An enlarged view of a part of FIG. (A) is a perspective view of a joint, (b), (c) is sectional drawing which shows an example of a latching | locking part. Exploded perspective view of guard pipe connection Sectional drawing which shows the usage example of other embodiment of a coupling 7 is a perspective view of the joint of FIG. Perspective view showing the outline of RC floor board bridge Perspective view of RC floor bridge with part of the side wall replaced by a protective fence Side view of the protective fence in FIG. Sectional view of the pipe connection of the protective fence Sectional drawing which shows the modification of the coupling of FIG. Sectional drawing of the guard pipe connection part of the guard fence of other embodiment

Explanation of symbols

A Combined structure guard fence 1 First guard fence 2 Strut 3 Pipe receiver 4 Guard pipe 4a Notch groove
5 Joint 5a Base plate 5b Auxiliary frame 5c U-bent part 5d Nut 5e Rib plate 5f Mounting plate 5g Locking part 6 Bolt 7 Cover plate 7a Cover part 8, 9 Bolt hole 10 Second protective fence 11 Outer frame 12 Metal net 13 Connection Bracket g Clearance

Claims (8)

A guard pipe is installed in a horizontal position between the pillars standing upright at a predetermined interval, and the guard pipe is connected in the longitudinal direction at the support part by the pillar, and the joint is inserted into the connection end of the adjacent guard pipe. In addition, the joint and the guard pipe end are fixed to the pipe receiver provided on the upper part of the column with bolts, and the guard fence provided with a gap for joint operation between the guard pipes connected to each other , A notch groove that enters the pipe longitudinal direction is provided at the end of the guard pipe, and a locking portion for locking a joint operation tool that is inserted into the pipe from the notch groove is provided in the pipe longitudinal direction on the outer periphery of the joint. A protective fence characterized by the provision of a plurality at intervals . The guard fence according to claim 1 , wherein the guard pipe is formed of an elliptical cross section, and the elliptical guard pipe is horizontally placed between the columns with the major axis of the ellipse being horizontally oriented. A base plate is inserted horizontally in the center of the guard pipe, and both side ends are fixed to the upper and lower surfaces of the base plate. Both side portions stand up in end view, and the intermediate portion connected to both side portions is wide. It consists of a bridge-shaped auxiliary frame that has a U-shaped bending part for stretching and absorbing in the middle of the direction and is bent so as to form a mountain shape, and each of the base plate and auxiliary frame almost fits inside the guard pipe. The protective fence according to claim 1 or 2 , wherein the guard fence is provided with a screw hole into which the bolt is screwed into the auxiliary frame. A base plate for horizontally inserting the joint into the center portion of the guard pipe, and both side ends are fixed to the upper and lower surfaces of the base plate. Both side portions stand in an end view, and an intermediate portion connected to both side portions is a guard. A screw that is configured with a bridge-shaped auxiliary frame that is bent along the inner surface of the pipe. The base plate and the auxiliary frame are sized to fit inside the guard pipe, and the bolts are screwed into the auxiliary frame. The protective fence according to claim 1 or 2 , wherein a hole is provided. The protective fence according to claim 3 or 4 , wherein the auxiliary frame is formed of a spring plate. A base plate into which the joint is inserted horizontally in the center of the guard pipe, a plurality of rib plates erected on the upper and lower surfaces of the base plate, and a mounting plate integrated with the rib plate on the lower surface of the base plate 3. The protective fence according to claim 1 or 2 , wherein each of the base plate and the rib plate is sized to fit substantially inside the guard pipe, and a screw hole into which the bolt is screwed is provided in the mounting plate. The protective fence in any one of Claims 1 thru | or 6 which provided the detachable cover plate which covers the clearance gap between guard pipes. A composite structure protective fence in which a second protective fence having a height higher than that of the protective fence is integrated with the outside of the protective fence according to any one of claims 1 to 7 .

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