JP2515678B2 - Support pillar for fall prevention fence - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prop for a fall prevention fence in a control passage provided along a roadway in a tunnel of a highway and provided higher than the roadway surface.

[0002]

2. Description of the Related Art As shown in FIG. 4, in a highway tunnel 40 managed by a road corporation or the like, one side along a roadway 41 is used by a management staff for maintenance of emergency telephones and emergency call devices. A control passage 42 (usually 0.8 m wide and about 1 m high from the surface of the roadway 41) is provided, and a fall prevention fence 43 is provided to prevent workers from falling into the roadway.
The fall prevention fence 43 is a completely fixed type in which the base ends of the pillars are buried in the control road 42 and the handrails are fixed between the pillars. In addition, 44 is a garbage pool and 45 is a drain.

[0003]

The inner wall surface of the tunnel 40 is closed about once a year by blocking the passage of vehicles and cleaning by a dedicated vehicle and 4 to 5 workers. When the wall surface A on the side is cleaned, the fixed fall prevention fence 43 is an obstacle, and the wall surfaces B, B on both sides that are easy to clean are about 3
It took double the cleaning time, and the labor burden on the workers was heavy. Further, since the passage of vehicles is blocked during this cleaning time, there is a possibility that a long-time cleaning operation may cause traffic congestion. The inventor of the present invention, as a result of examination in view of the problem of cleaning in the tunnel of the expressway, has completed the propeller for a fall prevention fence of the present invention.

[0004]

That is, the first aspect of the present invention is to:
In a fall prevention fence of a management passage provided along a roadway in a tunnel of a highway and higher than the roadway surface, a cylindrical case pipe embedded in the ground of the passageway and having an upper end opening to the roadway surface, The case pipe is composed of a case block that is detachably attached to the upper end opening of the case pipe, and a column member that can slide up and down in the case pipe through the case block. , Having a guide groove at the bottom of the strut member that fits a detent protrusion that is fixed at a right angle to the axial direction and that keeps the strut member from turning up and down.
The case block is provided with an engaging portion that engages with the detent protrusion of the raised strut member to prevent the strut member from disengaging, and a strut member in a state where the detent protrusion engages with the engaging portion. A holding part having a U-shaped cross section that can be raised only in one direction is formed, and a bent part capable of bending the pillar member is formed at a predetermined portion of the upper part of the detent protrusion of the pillar member to form the pillar member. The column member is erected by sliding it downward in a straight line so that the bent portion is located inside the case pipe, and it is pulled out upward to fall along the control passage surface at the engaging portion, and the bent portion is bent. A column for a fall prevention fence, characterized in that it is configured to hang down along a side wall on the road side of the management passage.

A second aspect of the present invention is a fall prevention fence for a management passage, which is provided along a roadway in a tunnel of an expressway and is higher than the roadway surface. The fence is buried in the ground of the passageway and its upper end is opened to the roadway surface. It consists of a cylindrical case pipe and a support member that can slide up and down in the case pipe. The case pipe is fitted with a detent protrusion fixed to the lower part of the support member at right angles to the axial direction. And has a guide groove for stopping and vertically moving the column member, and the upper end of the case pipe is constituted so that the detent protrusion of the raised column member comes into contact with the column member to prevent the column member from coming off. A pair of upper and lower bent portions are formed on the member at a predetermined interval, and the supporting member is erected by sliding the supporting member in a straight line downward to position each of the bent parts in the case pipe. Pull out upward At the lower bent portion, the strut member is laid down along the control passage surface, and at the upper bent portion, the strut member is hung down along the side wall on the roadside of the control passage. It is a pillar of. In the fall prevention fence formed by connecting a plurality of upright supporting members with a handrail, the swelling provided at the lower end of the supporting member without providing the guide groove of the case pipe and the rotation preventing protrusion of the supporting member. The fall prevention fence post according to claim 1 or 2, wherein the projecting portion is configured to prevent separation of the post member at the upper end of the case pipe.

[0006]

The function of the fall prevention fence of the present invention is to stand upright in the vicinity of the roadway side of the control passage provided on one side in the tunnel higher than the roadway. The horizontal railings are joined together to form a fall prevention fence. In this prop, a case pipe is buried near the road side of the control passage, the prop member is inserted into the case pipe, and the bent portion formed on the prop member is positioned in the case pipe so that the prop member stands upright. It is to maintain the state and make a normal fall prevention state.

According to the first aspect of the invention, however, the bent portion of the support post is defined as one location, and the support member is raised to the case.
Horizontally tilt it from the engaging part provided on the upper part of the pipe so that it runs along the road surface of the management passage, bend the bent part of the upper part and hang it down along the side wall on the roadway side of the management passage to prevent the fall prevention fence. It is in a state that is virtually equivalent to being removed.

In the second aspect of the invention, the bent portion of the support member is provided at two upper and lower positions, and the support member is raised to move the case.
Bend the lower bend that appeared from the pipe along the road of the control passage, and bend the upper bend so that it hangs along the side wall on the roadway side of the control passage in the same way as above, and it is a fall prevention fence. Is the state equivalent to the removal of. Further, in a third aspect of the present invention, in the case where the fall prevention fence is configured by connecting the upper portions of a plurality of columns with a handrail, the guide groove of the case pipe and the detent protrusion of the column member are not always necessary. Therefore, instead of these, a bulge portion is provided at the lower end of the strut member so that the strut member does not separate from the case pipe.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the accompanying drawings. FIG. 1 is a perspective view exemplifying a column for a fall prevention fence of the first invention. The column 1 of the present invention basically comprises a case pipe 2, a tubular column member 6, and a case block. 8 and.

As shown in FIG. 3, the case pipe 2 is buried near the roadway side of the control passage 42 (about 200 mm). The base plate 3 is provided on the bottom surface of the case pipe 2 and guides are provided at a pair of opposing sides. It has a rectangular tubular shape provided with the grooves 4 and 4, and a flange 5 is provided at the upper end thereof to open to the road surface of the management passage 42. This case pipe is about 300 mm long.

The case pipe 2 includes a lower strut member 6
The column member 6 formed by connecting the a and the upper column member 6b to the at least one side in a bendable manner by the bending portion 11 is inserted and slid up and down in the case pipe 2. Near the lower end of the lower strut member 6a, there are provided detents 7 and 7 for fixing the short rods at right angles to the pipe axis. The detents 7 and 7 are the guide grooves 4 and 4 of the case pipe 2. The pillar member 6 is located inside and is slidable only in the vertical direction in the case pipe 2 without rotating.

In the column 1, the case block 8 having a through hole in the center is detachably attached to a flange 5 provided on the upper end of the case pipe 2, and a column member 6 is provided.
Is adapted to penetrate through the case block 8 and slide vertically in the case pipe 2.

When the support member 6 is pulled upward, the detents 7, 7 of the lower support member 6a are engaged with the inside of the through hole of the case block 8 to support the support member. Engagement portions 10, 10 are provided to prevent the member 6 from coming off the case pipe, and a holding portion 9 having a U-shaped cross section for integrally raising the lower strut member 6a is provided integrally. Has been.

As shown in FIG. 3, the above-mentioned strut member 6 is actually connected to the adjacent strut 1 standing upright at a predetermined interval by a horizontal handrail 12 in the upper strut member 6b. Then, the fall prevention fence 13 of the unit is formed.

The strut 1 having such a structure cooperates with the adjacent strut 1 to keep the bent portion 11 connecting the lower strut member 6a and the upper strut member 6b in a straight state without bending.
The fall prevention fence 13 can be erected by inserting the bent portion 11 into the case pipe 2.

On the other hand, if necessary, the column member 6 is lifted so that the detents 7 and 7 are engaged with the engaging portion 10 of the case block 8.
When the lower strut member 6a is engaged with the lower strut member 6a and the lower strut member 6a is tilted from the missing portion of the holding portion 9, the lower strut member 6a is moved to the management passage 42
The upper strut member 6b can be made to hang down along the side wall of the management passage 42 on the side of the roadway 41 by bending the upper strut member 6b from the bent portion 11 of the strut member 6 at a right angle. it can.

Thus, the control passage 42 is opened to a state substantially equivalent to the removal of the fall prevention fence 13, and the portion of the wall surface A of the tunnel shown in FIG. 4 can be cleaned very easily from the roadway 41. .

Next, FIG. 2 illustrates a column for a fall prevention fence of the second invention, and the column 21 is basically composed of a case pipe 22 and a column member 26. .
The case pipe 22 has a rectangular tube shape with a substrate 23 and guide grooves 24, 24, and is similar to the case pipe of FIG. 1 in that it has a flange 25 at the upper end.

The supporting column member 26 is formed of a tubular body, and is composed of a lower supporting column member 26a, an intermediate supporting column member 26b, and an upper supporting column member in order from the bottom.
It is formed by connecting 26c. Lower strut member 26a
In the vicinity of the lower end of the
Is provided, and the support member 26 is restricted to slide only in the vertical direction when the support member 26 is pulled up along the guide grooves 24, 24 of the case pipe 22.

On the flange 25 at the upper end of the case pipe 22,
A fixing plate 28 having a through hole through which the strut member 26 penetrates is removably attached, and when the strut member 26 is pulled up, it is removed so as not to further rise due to the contact of the detents 27, 27. It is what is being prevented.

The lower strut member 26a and the middle strut member 26b of the strut member 26 are connected by a lower bent portion 29, and the middle strut member 26b is constructed so as to be erected in the direction of the arrow. The support member 26c is connected to the support member 26c by the upper bent portion 30, and is configured to be tilted in the same direction as viewed in the arrow.

Although not shown, the column 21 of FIG.
Lower the strut member 26 and place it in the case pipe 22.
The lower bent portion 29 and the upper bent portion 30 of the 26 are fitted and inserted to maintain the upright state, and the pillar member 26 is lifted so that the upper end of the lower pillar member 26a is at the same level as the fixing plate 28. By tilting the intermediate support member 26 in the direction of the arrow.
b can be made to hang down along the road surface of the management passage 42 and by bending the upper strut member 26c at a right angle along the side wall of the management passage 42 on the side of the roadway 41. In addition, in a fall prevention fence in which the upper portions of a plurality of upright standing pillar members are joined by a handrail in the lateral direction, the handrails substantially prevent the rotation of the case pipes from each other, so that the case pipe The guide groove and the protrusion for preventing rotation of the strut member are not always necessary, and although not shown, the bulging portion provided at the lower end of the strut member may contact the upper end of the case pipe and only prevent the strut member from coming off. Good.

[0023]

As described above, the first and second aspects of the present invention
According to the third aspect of the invention, the bent portion formed on the strut member is positioned in the case pipe in which the strut member is embedded, whereby the strut member is maintained in a normal upright state, and the fall prevention formed by the strut member is prevented. The fence can prevent workers from falling in the control passage in the tunnel of the expressway, and when cleaning the inner wall surface of the tunnel, use the pillar members.
The cleaning efficiency can be greatly improved by the extremely simple operation of ascending from the pipe and tilting it along the control passage surface, and then hanging it down along the side wall surface on the road side of the control passage. Is.

[Brief description of drawings]

FIG. 1 is a perspective view showing a part of a fall prevention fence column according to a first invention of the present invention with a notch and a part thereof seen through.

FIG. 2 is a perspective view showing a part of a fall prevention fence column according to a second invention of the present invention with a notch and a part thereof seen through.

FIG. 3 is a perspective view showing the use of a fall prevention fence using the pillar of the first invention of the present invention.

FIG. 4 is a front view of a tunnel showing the use of a conventional fall prevention fence.

[Explanation of symbols] 1 support 2 case pipe 3 substrate 4 guide groove 5 flange 6 support member 6a lower support member 6b upper support member 7 detent protrusion 8 case block 9 holding part 10 engaging part 11 bending part 12 handrail 13 Fall prevention fence 21 Strut 22 Case pipe 23 Base plate 24 Guide groove 25 Flange 26 Strut member 26a Lower strut member 26b Middle strut member 26c Upper strut member 27 Anti-rotation protrusion 28 Fixing plate 29 Lower bent portion 30 Upper bent portion 40 Tunnel 41 Road 42 Control passage 43 Fall prevention fence 44 Garbage pool 45 Drain

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-59-187910 (JP, A) Actually opened 62-103818 (JP, U) Actually opened 63-44957 (JP, U)

Claims (3)

(57) [Claims] 1. A fall-prevention fence for a control passage, which is provided along a roadway in a tunnel of an expressway and is higher than the roadway surface, and has a tubular casing which is buried in the ground of the passageway and whose upper end is open to the roadway surface. -A case pipe, a case block removably attached to an upper end opening of the case pipe, and a column member that can slide up and down in the case pipe through the case block. In the case pipe,
There is a guide groove in the lower part of the strut member that fits a rotation stop protrusion fixed at a right angle to the axial direction and stops and vertically moves the strut member, and the case block has the above-mentioned rotation of the raised strut member. An engaging portion that engages with the stop projection to prevent the support member from being disengaged, and a holding member having a U-shaped cross section that allows the support member to be tilted in only one direction in a state in which the anti-rotation projection engages with the engagement portion. And a bent portion capable of bending the strut member at a predetermined portion above the anti-rotation protrusion of the strut member, and the strut member is slid downward in a linear state to form the bent portion. By positioning it within the pipe, the column member is erected upright, pulled out upwards, laid down along the management passage surface at the engaging portion, and hung down along the side wall on the road side of the management passage at the bent portion. Fall prevention characterized by being configured as follows Use the post. 2. A fall-prevention fence for a control passage provided along a roadway in a tunnel of a highway, which is higher than the roadway surface, and is a tubular casing whose upper end is open to the road surface by being buried in the ground of the passageway. -A case pipe and a support member that can slide up and down in the case pipe, and the case pipe is fitted with a detent protrusion that is fixed to the lower portion of the support member at a right angle to the axial direction. It has a guide groove for stopping the rotation of the support pipe, and the upper end of the case pipe is configured so that the rotation prevention protrusion of the raised support member comes into contact with the support member to prevent the support member from coming off. The bent parts of the column are formed at a predetermined interval, and the column members are slid downward in a linear state so that the bent parts are positioned in the case pipe so that the column members stand upright and are pulled out upward. Bent part The column member for a fall prevention fence, characterized in that the column member is laid down along the surface of the management passage and is hung down along the side wall on the road side of the management passage at the bent portion at the top. 3. The fall prevention fence formed by connecting a plurality of upright pillar members by handrails, without providing the guide groove of the case pipe and the rotation preventing protrusion of the pillar member. 3. The column for a fall prevention fence according to claim 1, wherein the bulging portion provided at the lower end is configured to prevent the column member from being detached at the upper end of the case pipe.