JP2528439B2 - 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 pillar used as a fall prevention fence in a management passage provided along a roadway in a tunnel of a highway and higher than the roadway surface.

[0002]

2. Description of the Related Art In a highway tunnel managed by a road corporation or the like, a management passageway (usually with a width of 0.8 m) for maintenance of emergency telephones and emergency callers by a maintenance worker is provided on one side along a roadway. A height of about 1 m from the road surface) is provided, and a fall prevention fence is provided to prevent workers from falling to the roadway. This fall prevention fence is a completely fixed type in which the base ends of the pillars are buried in the control road and handrails are fixed between the pillars.

[0003]

The inner wall surface of this tunnel is cleaned about once a year by blocking the passage of vehicles and cleaning by a dedicated vehicle and 4 to 5 workers. When cleaning the wall surface, the fixed fall prevention fence interferes,
The wall of the control passage in the part where the fall prevention fence was installed took about three times as long as the cleaning time compared to other walls, and the labor burden on the workers was heavy. Further, during this cleaning work, the traffic of the vehicle is cut off, so that the cleaning work for a long time may cause traffic congestion. The inventor of the present invention has completed the fall prevention fence post of the present invention installed in the management passage as a result of the examination in view of the problem of cleaning in the tunnel of the expressway.

[0004]

The propeller for a fall prevention fence of the present invention is a propeller for a fall prevention fence of a management passage provided along a roadway in a tunnel of an expressway and higher than the roadway surface. The base end portion is joined at right angles to the outside of one end of the short rod-shaped support body, and the other end portion of the support body is pivotally supported by a fixing member fixed to the road surface on the road side of the management road to support the main pillar body. The support body is configured to be upright, and the one end of the support body is projected horizontally to the roadway by reversing by rotation of the support body so that the pillar main body hangs down along the roadway side wall of the management passage. There is a holding portion, and the holding portion is always attracted to the holding portion side by a built-in spring, and by pulling out and rotating against the biasing force of the spring, the one end side of the support body is pressed to engage. The lock member that stops and the lock that is locked by the rotation. In contact with the outside of the click member is characterized in that formed by providing a safety cam capable of ensuring the locking of the support by the locking member.

[0005]

The function of the falling 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 of the tunnel higher than the roadway, and is installed upright with a certain space. Horizontal railings are connected between the columns to form a fall prevention fence.

In this support, the main body of the support is attached at a right angle to a support body which is supported by a fixing member provided on the side of the road of the control passage and can take a horizontal position which is reversed from a normal horizontal state. The lock member held by the holding portion of the lock member is locked to the support member, and the safety cam is brought into contact with the locked lock member to secure the lock of the lock member. It is fixed in a horizontal position to maintain the upright state of the pillar. Then, the contact of the safety cam to the lock member is released, and the lock member releases the lock to the support body to invert the support body, so that the pillar main body hangs down on the side wall on the roadway side of the management passage and falls. It is possible to make it almost as if the fence was removed. The locking member can be operated very easily by pulling out and rotating against the biasing force of the spring, and the safety cam can be operated very simply by simply rotating, so that the hanging of the strut member can be performed easily. The cleaning of the underside of the wall of the control passage in the tunnel can be performed very easily and safely.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the accompanying drawings. The drawings show the columns for the fall prevention fence of the present invention,
As shown in FIG. 1, the column 1 for a fall prevention fence is basically a column main body 2 and a support 3 connected to the base end of the column main body 2.
And a fixing member 5 that is fixed to a road surface near the road side of the management passage A and rotatably supports the support body 3.

A support body 3 which is connected to the base end of the pillar main body 2.
Has a substantially rod-shaped cross section, and an engaging portion 10 with which an L-shaped cross section of a lock member 11 described later abuts at one end thereof.
The pillar main body 2 is connected to the outer surface near one end thereof at a right angle, and the connecting portion is reinforced by the triangular ribs 4.

The fixing member 5 is integrally fixed between a pair of short L-shaped steels 6 and 6 which are arranged in parallel to each other and the L-shaped steels 6 and 6, as is particularly clear in FIGS. 1 and 2. The lock member 11 and the holding portion 7 for holding the safety cam 14 are provided. The L-shaped steels 6 and 6 have a holding portion 7 interposed in the middle thereof to support the support 3 from below, and are bolted to the road surface of the control passage A via a base plate 8. ing.

The support 3 is pivotally supported on the L-shaped steels 6 and 6 by a support shaft 9 penetrating near the other end of the support 3 in the upper part of the holding portion 7, and as shown by an arrow in FIG. The support main body 2 is configured so that it can be inverted from a normal horizontal state in which the pillar main body 2 is upright about the support shaft 9 to a reverse horizontal state via a vertical state. In the state where the strut main body 2 is upright, and in the inverted horizontal state, the one end of the support body 3 projects toward the roadway side of the management passage A and the main strut body 2 hangs down along the side wall of the management passage A on the roadway side. Become.

Therefore, the support 3 is locked to the holding portion 7 of the fixing member 5 by the mechanism described below in the normal horizontal state. That is, as shown in FIG. 2, a lock member 11 having a sectional shape in which an L-shaped bending piece is integrally added to one end of a U-shaped parallel portion is fixed to a rotary shaft 12 with a nut, The lock member 11 is always pulled to the left side by a spring 13 formed of a coil spring that is inserted into the fitting portion of the holding portion 7 and is interposed between the holding member 7 and the holding portion 7. The other end can be rotated while pulling to the right against the urging force of the spring 13.

On the other hand, a slender plate-shaped safety cam 14 is rotatably supported by the holding portion 7, and comes into contact with the lock member 11 from the outside by the rotation.

In FIG. 2, the lock member 11 is replaced by a spring 13
It is rotated against the urging force of the spring to position the portion having an L-shaped cross section at the engaging portion 10 of the support body 3 in the normal horizontal state to release the tension, and is locked by the urging force of the spring 13. The member 11 can be fitted into the engaging portion 10 to lock the support body 3 in a horizontal state. Then, the safety cam 14 shown in FIG. 3 is rotated and brought into contact with the outer side of the lock member 11 in a horizontal state, whereby the locking by the lock member 11 can be made more reliable and the pillar main body 2 can be fixed upright. Yes, with the lock member 11,
With the safety cam 14, its upright state can be reliably maintained.

On the other hand, in order to bring the main pillar body 2 in the upright state into a free state, the reverse operation, that is, FIG.
As shown in FIG. 4, the safety cam 14 is rotated to tilt it outward (right side in FIG. 4) to release the contact with the lock member 11, and then the lock member 11 is rotated while being pulled against the biasing force of the spring 13. By moving and tilting outward (left side in FIG. 4) to release the lock to the support body 3, the strut main body 2 is in a state in which it can easily be recoiled. It can be in a suspended state along the side wall.

Therefore, by providing a plurality of columns 1 for the fall prevention fence having such a structure in the management passage A, and connecting the adjacent columns to each other with the handrail 15, a fall prevention fence that can be collapsed is constructed. Is what you can do.

[0016]

As described above, the propeller for a fall prevention fence according to the present invention has the support body fixed at right angles to the base end of the prop body fixed to the road surface of the management passage provided in the tunnel. It is pivotally supported by the member and can rotate from the normal horizontal state to the inverted horizontal state with respect to the fixed member, and the support body is fixed in the normal horizontal state by the lock member and the safety cam, and the pillar main body stands upright. By disengaging the lock member and the safety cam and setting the support to the inverted horizontal position, the pillar main body is hung along the side wall on the side of the road of the control passage, and the fall prevention fence is effectively removed. To do. By making the pillar main body in such a hanging state, it is possible to extremely easily clean the underside of the wall surface of the management passage in the tunnel.

The fall-prevention fence support of the present invention has an extremely simple structure, and by using a lock member and a safety cam, a double lock effectively holds upright support mainly of the support, and the lock is released. By reversing the support, the inability to clean the inside of the tunnel due to the presence of the fall prevention fence can be greatly improved.

In the support pillar for fall prevention fence of the present invention, the fixing member is simply fixed on the management passage without any special work being carried out on the management passage, and the support provided mainly for the support pillar is attached to this fixing member. It is possible to construct a fall-prevention fence that can fall freely, and it is possible to greatly reduce material costs, construction costs, work labor, and the like.

[Brief description of drawings]

FIG. 1 is a perspective view for explaining a state of a fall prevention fence column of the present invention.

FIG. 2 is a partial side view showing a perspective view of a mounting portion of a column for a fall prevention fence of the present invention.

FIG. 3 is a rear view showing a perspective view of a mounting portion when the pillar main body of the pillar for a fall prevention fence of the present invention is upright.

FIG. 4 is a rear view showing a perspective view of a mounting portion of the fall prevention fence support of the present invention when the lock of the support main body is released.

[Fig. 5] Fig. 5 is an action diagram showing the fall of the fall prevention fence column of the present invention.

[Explanation of symbols]

 1 Support for fall prevention fence 2 Main body of support 3 Support body 4 Triangular rib 5 Fixing member 6 L-shaped steel 7 Holding part 8 Base plate 9 Support shaft 10 Engaging part 11 Locking member 12 Rotating shaft 13 Spring 14 Safety cam 15 Hand Sliding A Management passage

Claims (1)

(57) [Claims] 1. In a propeller for a fall prevention fence of a control passage provided along a roadway in a tunnel of a highway and higher than the roadway surface, the base end of the post main body is near one end of a short rod-shaped support. The support body is vertically connected by a support member that is connected to the outside at a right angle, and the other end of the support member is pivotally supported by a fixing member that is fixed to the road surface of the road on the control road, and the pillar main body is erected upright by the support member. The one end of the body is horizontally projected to the roadway, and the strut main body is configured to hang down along the roadway side wall of the management passage,
The fixing member has a holding portion for the lock member, and the holding portion is always attracted to the holding portion side by a built-in spring, and is pulled out and rotated against the biasing force of the spring to rotate the one end of the support body. A lock member for pressing and locking the side and a safety cam capable of ensuring locking of the support body by the lock member by contacting the outside of the locked lock member by rotation are provided. Support pillar for fall prevention fence.