JP2994311B2 - 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 manhole safety garage disposed on a receiving frame for holding a manhole cover.
The present invention relates to a device for mounting a pad.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS.
Iron manhole safety bracket in the receiving frame that holds the lid
The arrangement of the guard is already known. That is, 21
Is a receiving frame for holding a manhole cover (not shown), and a step / safety guard mounting member 23 is attached to the inner periphery of the receiving frame 21 and faces the member 23. At the positions, support shafts 24, 24 for rotatably supporting the safety guard 22 are mounted, and the safety guards are mounted on the support shafts 24, 24 via bolts 25, nuts 26, respectively. The mounting projections 27, 27 protruding from one end of the arm 22 are pivotally pivoted.

[0003] When the manhole cover is opened to use the manhole, the manhole cover receiving frame 21 has a seat.
Since the foot guard 22 is mounted, the worker does not fall into the manhole by mistake. Also,
When an operator enters the manhole, the safety guard 22 is rotated about the pivot to open the safety guard 22, and the step and safety guard is opened. The lowering member 23 is used to get down.

[0004]

By the way, the safety guard 22 has one end simply mounted on a step / safety guard mounting member 23 and the other end rotatably. Since it is only pivoted, its installation is not stable, it requires excessive effort to rotate the safety guard 22, and it is rusted because the pivot uses bolts and nuts. There is a possibility that the rotation of the safety guard 22 may be difficult and the desired opening and closing of the safety guard 22 may not be performed due to a long-term use.

SUMMARY OF THE INVENTION 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 make a lightweight safety guard into a substantially polygonal shape.
By restraining the movement of the outer periphery, it is safe. Furthermore, it does not use bolts and nuts, so it can withstand long-term use and can be used effectively. It is a lightweight and strong safety guard for manholes. It is intended to provide a mounting device.

[0006]

In order to achieve the above-mentioned object, a safety guard mounting device for a manhole according to the present invention comprises a synthetic resin containing a glass fiber and a safety guard. And the outer periphery of the safety guard is substantially polygonal, W-shaped projections are formed at both ends of one side of the substantially polygonal shape, and the W-shaped projections are Can be inserted into a safety rope locking recess provided on the inner periphery of the L-shaped protrusion, and L-shaped protrusions are formed at both ends of the other side opposite to the one side, and one of the L-shaped protrusions is formed. The holding member is selectively inserted into holes at both ends of the holding member fixed to the receiving frame.

[0007] Also, a number of non-slip members and a plurality of reflectors are provided on the upper surface of the safety guard.

[0008]

1 to 5 relate to one embodiment of the present invention, and FIG. 1 shows a safety device according to the present invention.
FIG. 2 is a plan view of the safety guard, FIG. 3 is a front view of FIG. 2, FIG. 4 is a side view of FIG. 2, and FIG. 5 is a safety view. It is a top view of the receiving frame which removed the guard.

In FIG. 1, reference numeral 1 denotes a receiving frame for holding a manhole cover (not shown).
A holding member 2 for mounting the step and safety guard fixed to the first and second safety rope locking recesses 3 and 3 are opposed to each other.

A safety member 4 is made of a synthetic resin containing glass fiber and is formed in a lattice shape, and its outer periphery is substantially polygonal.
It is a guard. W-shaped protrusions 5 and 5 are formed at both ends of one side of the substantially polygonal shape, and L-shaped protrusions 6 and 6 are formed at both ends of the other side facing the one side. . The L-shaped projections 6, 6 are projections 6a, 6a projecting at right angles to the grid-shaped safety guard.
And protrusions 6b, 6b projecting in the horizontal direction.

On the upper surface of the safety guard 4, a large number of protrusions 7, 7,... And a plurality of reflectors 8, 8,.

The safety rope locking recesses 3, 3 are provided with U-shaped grooves 9, 9 opening toward the center of the manhole.
Holes 10 are formed at both ends of the holding member 2 to penetrate upwardly of the manhole. Reference numeral 11 denotes a partition member arranged at the center of the U-shaped groove 9, and a safety cable (not shown) or the like can be hooked in a loop shape through the partition member 11.

Since the safety guard mounting device for a manhole having the above-described structure is used, first, W-shaped projections 5, 5 at both ends of one side of the safety guard 4 are provided. Are inserted into the U-shaped grooves 9, 9 of the safety rope locking recesses 3, 3 provided on the inner periphery of the receiving frame, and then the L on the other side facing the one side is inserted.
The vertical (downward) projections 6a, 6a,
6a is inserted into the holes 10, 10 of the holding member 2. In this way, the safety guard 4 is easily and securely installed.

Then, the safety guard 4 is made of a synthetic resin containing glass fiber and formed in a lattice shape.
Since the outer periphery of the guard is substantially polygonal and bolts and nuts are not used for its attachment, the safety guard 4 should be easy to attach, lightweight and tough, and endure long-term use. Become.

[0015] When the manhole cover is opened to use the manhole, the receiving frame 1 has a strong safety.
Since the guard 4 is reliably and stably held, there is no possibility that an operator or the like falls down into the manhole by mistake.
When a worker enters the manhole, firstly
The protrusions 6a, 6a are disengaged from the holes 10, 10 while lifting up the L-shaped protrusions 6, 6 side of the foot guard 4, and the U-shape of the safety rope locking recesses 3, 3 is lifted. By pulling out the W-shaped projections 5, 5 from the groove 9, 9, the lightweight safety guard 4 can be easily removed from the receiving frame 1, and the holding member 2 fixed to the receiving frame 1 can be removed. Hole 10,
The operator can easily insert the L-shaped projections 6, 6 into the manhole by inserting the projections 6b, 6b extending in the horizontal direction of the L-shaped projections 6 and setting the safety guard 4 up. You can get off.

On the upper surface of the safety guard 4, a large number of non-slip members 7, 7,... And a plurality of reflectors 8, 8,.
The safety guard is not slipped even if the operator gets on the safety guard 4 by mistake, and the existence and outline of the safety guard 4 are clarified even in a dark place. It becomes a safe guard 4.

[0017]

According to the present invention, the safety guard is formed in a lattice shape by using a synthetic resin containing glass fiber.
The outer periphery of the hood guard is substantially polygonal, and W-shaped projections are formed at both ends of one side of the substantially polygonal shape. The W-shaped projections are secured on the inner periphery of the receiving frame by a safety rope. L-shaped projections are formed at both ends of the other side opposite to the one side, and one of the L-shaped projections is selected to hold the L-shaped projection fixed to the receiving frame. The safety guard can be easily attached because it is inserted into the holes at both ends of the member, and when the manhole cover is opened to use the manhole, the strong safety Since the foot guard is securely and stably held, workers etc. do not fall into the manhole by mistake, and when the worker enters the manhole, the safety Easily remove the safety guard and place the safety guard on the holding member fixed to the receiving frame. More, the operator easily sailing - can descend into Le, mounting easy, lightweight tough sailing - cell for Le - Futi - gas - the de mounting device.

According to the second aspect, in addition to the above-mentioned effects, a large number of non-slip members and a plurality of reflectors are provided on the upper surface of the safety guard, so that it is safe and in a dark place. For manholes whose presence and outline are clear
It becomes a mounting device for the foot guard.

[Brief description of the drawings]

FIG. 1 is a plan view of a manhole cover receiving frame provided with a safety guard according to the present invention.

FIG. 2 is a plan view of a safety guard.

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

FIG. 4 is a side view of FIG. 2;

FIG. 5 is a plan view of the manhole cover receiving frame with a safety guard removed.

FIG. 6 is a plan view of a conventional manhole cover receiving frame provided with a safety guard.

FIG. 7 is a sectional view taken along the line AA of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Receiving frame 2 Holding member 3 Safety hole locking concave hole 4 Safety guard 5 W-shaped projection 6 L-shaped projection 7 Non-slip member 8 Reflector

Claims (2)

(57) [Claims] 1. A device for mounting a safety guard disposed on a receiving frame for holding a manhole cover, comprising:
The guard is made of a synthetic resin containing glass fiber and is formed in a lattice shape, the outer periphery of the safety guard is made substantially polygonal, and W-shaped projections are formed at both ends of one side of the substantially polygonal shape. Making the W-shaped projection insertable into a safety rope locking recess provided on the inner periphery of the receiving frame, forming L-shaped projections at both ends of the other side facing the one side, A manhole seat, wherein one of the L-shaped protrusions is selected and fitted into holes at both ends of a holding member fixed to the receiving frame.
Foot guard mounting device. 2. The safety guard for a manhole according to claim 1, wherein a plurality of non-slip members and a plurality of reflectors are provided on the upper surface of the safety guard. Mounting device.