JP3224095B2 - Mounting device for safety guard for manhole - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for mounting a manhole safety guard disposed below a receiving frame for holding a manhole cover.

[0002]

2. Description of the Related Art In a safety guard mounting device disposed below a receiving frame for holding a manhole cover, a safety guard is provided.
A foot guard is formed in a grid shape, a plurality of locking holes are formed on the outer periphery of the grid, and a central row is formed in a ladder shape, and a plurality of protruding support bars are formed on one side of the central row. A guard receiving angle supported by the manhole below the safety guard is provided, and a plurality of support pipes and a plurality of support pieces are formed in the guard receiving angle. -When the support is installed, the support piece is inserted into the locking hole, and the safety guard is inserted.
Japanese Patent Application Laid-Open No. H11-1934 discloses a structure in which the projecting support rod is inserted and supported in a support tube when the door is opened.

[0003]

Since the guard receiving angle is formed integrally in a substantially ring shape, it is necessary to reduce the diameter of the ring shape in order to mount it on the wall surface of the manhole. In addition, the mounting work is troublesome, and there is a possibility that the entire guard receiving angle cannot be stably mounted on the wall surface of the manhole due to irregularities often seen on the wall surface of the manhole.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a guard receiving angle formed of a divided body and a wall of a manhole. It is extremely easy to install the guard receiving angle on the guard receiving angle, and when the safety guard is installed on the guard receiving angle and when the safety guard is installed.
A manhole with a guard receiving angle that can stably and securely hold the safety guard when opening the safety guard.
The purpose of the present invention is to provide a device for attaching a safety guard for a vehicle.

[0005]

Means for Solving the Problems In order to achieve the above-mentioned object, an apparatus for mounting a safety guard for a manhole according to the present invention comprises: forming a safety guard in a lattice shape; Forming a plurality of locking holes on the outer periphery of the lattice and making the center row a ladder shape, forming a plurality of protruding supports on one side of the center row,
A guard receiving angle supported by the manhole below the safety guard is composed of three divided bodies, a plurality of support tubes are formed in a central divided body, and each of the divided bodies on both sides is formed. A plurality of support pieces are formed on the support piece, and when the safety guard is installed, the support piece is inserted into the locking hole, and when the safety guard is opened, the protruding support rod is engaged. It is characterized by being inserted and supported by a support tube.

[0006]

1 to 5 relate to an embodiment of the present invention. FIG. 1 is a perspective view showing a state in which a safety guard is installed in a guard receiving angle according to the present invention. Figure,
FIG. 2 is a side view of the center divided body of the guard receiving angle, FIG. 3 is a plan view thereof, FIG. 4 is a side view of the divided bodies on both sides of the guard receiving angle, and FIG. 5 is a plan view thereof.

In the drawing, reference numeral 1 denotes a safety garage disposed below a receiving frame (not shown) for holding a manhole cover.
The safety guard 1 is placed and held on a guard receiving angle 2.

The safety guard 1 is made of a synthetic resin containing glass fiber, is formed in a substantially lattice-like shape over the entire inner periphery of the entrance wall of the manhole, and is lightweight and strong. . A plurality of locking holes 3, 3... Are formed on the outer periphery of the lattice of the safety guard 1. In addition,
A central row 4 of the lattice of the foot guard 1 is formed in a ladder shape, and protruding supporting rods 5 and 5 are formed on one side of the central row 4.

The guard receiving angle 2 is a three-piece body 2
a. 2b, 2b, both of which are made of synthetic resin mixed with glass fiber like the safety guard 1. Support pipes 6, 6 which can insert and support the protruding supporting rods 5, 5 formed on the safety guard 1 are provided upright at the central guard receiving angle divided body 2a. . Therefore, when using the manhole, the safety guard 1 is opened from the manhole inlet wall, and the protruding supporting rods 5, 5 of the safety guard 1 are connected to the support tubes 6, 6. By inserting them, the safety guard 1 is erected at the entrance of the manhole.

A discharge hole 7 for discharging water or sludge is formed at the bottom of the support pipe 6 to prevent accumulation of sludge and the like in the support pipe 6. Slots 8 are formed in the side walls of the guard receiving angle divided body 2a, and bolts (not shown) implanted in the manhole wall are engaged with the slots 8. The divided body 2a is adapted to be locked on the manhole wall.

Further, guard receiving angle divided bodies 2 on both sides.
b are provided with support pieces 9, 9,... at positions facing the locking holes 3, 3,... formed in the safety guard 1, respectively. The safety guard 1 is supported by the guard receiving angle 2 substantially on its outer periphery by being inserted into the stop holes 3, 3,.... Since there is a lock hole 10 provided in the vicinity of the upper end of the support piece 9, the hole 10 is used while the safety guard 1 is supported by the guard receiving angle 2. Locking prevents the lightweight safety guard 1 from being removed illegally. Further, the eaves 11 are provided above the support pieces 9.
This prevents the safety guard 1 from floating from the guard receiving angle 2.

Then, the guard receiving angle divided body 2
Slots 12b are also formed in the side wall of b, and bolts (not shown) implanted in the manhole wall are engaged with the long holes 12, so that the divided body 2b is engaged with the manhole wall. It has been stopped.

As described above, the guard receiving angle 2 is 3
Since it is composed of the divided bodies 2a, 2b and 2b, when the guard receiving angle 2 is installed along the wall surface of the manhole, it is only necessary to arrange each divided body. The work for attaching the guard receiving angle 2 to the wall of the manhole is extremely easy, and the guard receiving angle 2 can be stably mounted even if the manhole wall has some irregularities.

Since the guard receiving angle 2 is stably mounted, the safety guard 1 can be installed on the guard receiving angle 2 and the safety guard 1 can be installed.
When the door 1 is opened, the safety finger 1 can be stably and reliably held.

[0015]

According to the present invention, since the guard receiving angle is composed of three divided bodies, when the guard receiving angle is installed along the wall surface of the manhole, each divided body is separated. It is extremely easy to attach the guard receiving angle to the wall of the manhole because it is only necessary to place the
Moreover, the guard receiving angle can be stably attached to the wall of the manhole. And, since the guard receiving angle is stably attached, the safety guard is provided when the safety guard is installed on the guard receiving angle and when the safety guard is opened. -It is possible to hold the moth stably and reliably.

[Brief description of the drawings]

FIG. 1 shows a guard receiving angle according to the present invention.
It is a perspective view in the state where a foot guard was installed.

FIG. 2 is a side view of a center divided body of a guard receiving angle.

FIG. 3 is a plan view of FIG. 2;

FIG. 4 is a side view of a divided body on both sides of a guard receiving angle.

FIG. 5 is a plan view of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Safety guard 2 Guard receiving angle 2a Central guard receiving angle 2b Guard receiving angles on both sides 3 Locking hole 4 Central row 5 Projection support rod 6 Support pipe 9 Support piece

Claims (1)

(57) [Claims] An apparatus for mounting a safety guard disposed below a receiving frame for holding a manhole cover, wherein the safety guard is formed in a lattice shape, and is provided on an outer periphery of the lattice. A plurality of locking holes are formed, a central row is formed in a ladder shape, and a plurality of protruding supporting rods are formed on one side of the central row.
The guard receiving angle supported by the manhole below the door is composed of three divided bodies, a plurality of support tubes are formed in the center divided body, and a plurality of support pieces are formed in each of the divided bodies on both sides When the safety guard is installed, the support piece is inserted into the locking hole, and when the safety guard is opened, the protruding support rod is inserted and supported by the support tube. A mounting device for a safety guard for a manhole, characterized in that: