JP3071211U - Frame for underground structures with a fall prevention fence such as a lid - Google Patents

Abstract

(57) [Abstract] [Problem] To attach a fence to a base frame to prevent a person or a lid from dropping or falling, but to prevent it from being lifted vertically. SOLUTION: On two opposing sides of the receiving frame 1, a receiving frame 1 is provided.
The upper surface of the lid receiving shelf 2 or the upper surface of the shelf 2 of the inner peripheral wall is the same or lower than the upper surface, and the upper side and the inner side surface of the receiving frame 1 in plan view are opened, and the upper surface of the receiving frame 1 hangs downward from the upper opening. A plurality of bag-shaped recesses 7 having a shape bent at the lower end thereof are provided.
The two ends of the rod body 8 of the fall prevention fence 6 with
The fall prevention fence 6 is detachably mounted on the receiving frame 1 by being pushed into the refraction portion from the opening above the frame.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a receiving frame of an underground structure to which a fall prevention fence such as a lid is detachably attached. Underground structures include those generally referred to as manholes, and include large-scale iron lids, sewage basins, electric power and communications Underground facilities for underground facilities, underground cables, optical fiber cables, etc. A fire hydrant lid, a water control valve lid, an air valve lid, a gas pipe lid, a water meter lid, etc., which have the function of an opening / closing door connecting the above, and a receiving frame supporting those lids.

[0002]

[Prior art]

 In the conventional underground structure, a pendulum hinge is attached to the inner peripheral wall of the receiving frame 1, and a lid (not shown) is placed on the shelf 2 and the pendulum hinge is attached to the back of the lid. Into the hole 4 of the projection 3 provided on the inner peripheral wall of the receiving frame 1, the lid can be rotated by 180 degrees around the hinge, the locking means provided on the hinge is opened, and the hinge is connected to the projection 3. The lid is removed from the hole 4 so that the lid can be removed from the receiving frame 1.

[0003]

[Problem to be solved by the invention]

 In conventional underground structures, workers may accidentally fall and get injured while installing or removing the lid, or the lid may fall accidentally, causing water pipes, gas pipes, optical fiber cables, etc. Otherwise, water or gas may be squirted by destroying the equipment, power outage or communication failure may occur, or expensive equipment may be damaged. The object of the present invention is to provide a receiving frame for an underground structure in which a fence for preventing a person or a lid from falling or falling is detachably mounted on a receiving frame 1, but a fence that is not vertically lifted is mounted.

[0004]

[Means for Solving the Problems]

 On two opposing sides of the receiving frame of the underground structure, a lid receiving shelf on the inner peripheral wall of the receiving frame or a projection provided at the same level or below the upper surface of the shelf, the upper portion and the projecting portion of the receiving frame in plan view. A plurality of bag-shaped recesses each having an opening on one side and hanging downward from an upper opening thereof and refracting at the lower end thereof are provided, and a plurality of parallel bars corresponding to the number of the recesses are provided. The two ends of the rod corresponding to the concave portion of the fall prevention fence with the right angles are pushed into the bending portion from the opening above the recess, and the fall prevention fence is detachably mounted on the receiving frame. The bent portion of the bag-shaped concave portion is preferably inclined downward at an obtuse angle from the lower end of the vertical portion.

[0005]

[Embodiment of the invention]

 An embodiment of the present invention will be described with reference to the drawings. The receiving frame 1 has a shelf 2 for placing a lid (not shown) on the inner peripheral wall, and a projection 3 having a hole 4 for inserting a hinge (not shown), as in the conventional case. Is provided.

In the receiving frame 1, at least two opposing sides are provided with projections 5 whose upper surfaces are the same as or lower than the upper surface of the shelf 2, and each of the projections 5 has When the end of the bar of the fence 6 for preventing falling and falling described later is inserted and supported, the upper part is open, and it hangs down from above, and is bent at right angles in the horizontal direction at the lower end. 2 and 3, or a bent bag-like shape which is inclined downward at an obtuse angle and opens at the side wall of the receiving frame 1 in the plan view. A recess 7 is provided.

[0007] The recess 7 may be provided with the protrusion 5 without providing the protrusion 5 and increasing the thickness of a necessary portion of the shelf 2 to provide the recess 7 in that portion.

The fence 6 is formed by fixing a plurality of rods 9 at right angles to rods 8 arranged in parallel with the number of pairs of opposing recesses 7. In FIG. Then, it is pushed down from the opening, and further pushed laterally into the bending portion of the concave portion 7, and the fence 6 is mounted on the receiving frame 1. In this case, as shown in FIGS. 2 and 3, the opening of the side wall of the receiving frame 1 in the recessed portion 7 in the plan view inwardly hangs downward from above, and has a lower end with an obtuse angle inclined downward. In this case, when the bar 8 of the fence 6 is made to correspond to the upper opening and the hand is released, the fence 6 falls to the lower end of the bent portion of the concave portion 7 and falls down by the weight of the fence 6.

The fence 6 is supported by the bottom surface of the bent portion of the concave portion 7 and does not fall, and only by vertically lifting the fence 6, both ends of the rod 8 contact the upper surface of the bent portion of the concave portion 7. Therefore, both ends do not come out of the concave portions, and the receiving frame 6 does not come off. In order to remove the fence 6, the fence 6 must be moved sideways, and both ends of the rod 8 must be moved to the lower end of the vertical portion of the recess 7 and then lifted.

The lid is attached to the receiving frame 1 after the fence 6 is mounted, and is closed.

[0011] The underground structure is not limited to the above-described structure in which the lid is inserted with the pendulum-type hinge into the receiving frame 1 in the hole 3 of the receiving frame 1; The structure may be such that it is locked and attached by locking means or a locking device.

[0012]

[Effect of the invention]

 The receiving frame of the underground structure according to the present invention is mounted so that the fence can be detached but not lifted vertically, and the lid is placed over it, so it can be used when opening the lid, attaching and removing the lid. During operation, it is possible to prevent people and lids from falling and falling, thereby preventing human injury and damage to equipment and facilities in underground structures. In the case where the opening of the side wall in the plan view inward direction of the receiving frame 1 of the concave portion for inserting and supporting the end of the bar of the fence hangs downward from above and has a shape in which its lower end is obliquely inclined downward at an obtuse angle. When the fence rod is made to correspond to the opening above and the hand is released, the fence will fall to the lower end of the recess and fall down due to the weight of the fence, so it does not require much effort to install the fence.

[Brief description of the drawings]

FIG. 1 is a plan view of a receiving frame to which a fence is attached.

FIG. 2 is a sectional view taken along line AA of a receiving frame to which a fence is attached.

FIG. 3 is a sectional view taken along line AA of the receiving frame from which the fence is removed.

FIG. 4 is a plan view of a fence.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 receiving frame 2 shelf 3 protrusion 4 hole 5 protrusion 6 fence 7 recess 8, 9 rod

Claims (2)

[Utility model registration claims] At two opposing sides of a receiving frame, a lid provided on the inner peripheral wall of the receiving frame or a projection provided at the same level or below the upper surface of the shelf is provided with an upper portion and an inner side in plan view of the receiving frame. A plurality of bag-shaped recesses each having an opening on a side surface, hanging downward from an upper opening thereof, and being bent at a lower end thereof are provided, and a plurality of rods are orthogonal to a plurality of parallel rods corresponding to the number of the recesses. The fall-prevention fence, which is formed by pushing both ends of the rod corresponding to the recess into the refraction section from the opening above the recess, and attaching the fall-prevention fence to a receiving frame detachably, such as a lid. Receiving frame for installed underground structures. 2. The underground structure according to claim 1, wherein the bent portion of the bag-shaped concave portion is inclined downward at an obtuse angle from the lower end of the vertical portion. The receiving slot for things.