JPH0223647Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a manhole mechanism having a rectangular lid.

Methods for opening a manhole cover include those that use a hand hook or crowbar to pry it open, those that flip the lid hinged to the receiving frame, and those that lift the cover once and then rotate it out of the receiving frame. However, in either method, most of the load on the lid is borne by the operator, and if the lid is large and heavy, it becomes difficult to open the lid, and the lid also has to be handled roughly.

The present invention was developed with a focus on the above-mentioned problems, and its purpose is to provide a manhole mechanism that allows the lid to be easily pulled out and put away from the frame, and that can be handled carefully without being rough. It's about doing.

That is, the present invention consists of a rectangular lid 1 and a frame 2 that supports it.Protrusions 3, 3 are provided at both left and right ends of one end of the lid 1, and an edge on which the projections 3, 3 slide. portions 4, 4 are formed on the inner periphery of the frame body 2, and furthermore, a pair of rollers 5, 5 are rotatably provided opposite to each other on the upper edge of the other end of the frame body 2, and the rollers 5 This manhole mechanism is characterized in that a pair of protrusions 6, 6 that slide by means of , 5 are provided on both left and right sides of the lid body 1.

To explain the present invention in detail below, in the illustrated embodiment, reference numeral 1 denotes a rectangular lid body whose upper surface is almost entirely recessed into a dish-shaped portion 1a, and 2 denotes a frame that supports the lid body 1. A pair of vertical frames 2a, 2a and a horizontal frame 2b,
2b assembled into a square shape using bolts 2c and nuts 2d. Reference numeral 3 denotes a projection projecting downward from the end of the dish-shaped lid 1 toward the outer end, and is formed integrally with the tips of a pair of protrusions 6, 6 provided along the lower edges of the left and right sides of the lid 1. When the lid is closed, it is located in a recess 7 provided in the lid support edge 4 formed on the inner periphery of the frame 22 and is removed from the edge 4. The edge 4 is wide and touches the four circumferences of the bottom of the lid 1, and has a frame-shaped groove 4a in which a sealing member 8 is inserted.
(rubber packing, etc.) is attached. Reference numeral 5 designates rotatable rollers 5a that are rotatably supported on the inner periphery of the other end of the frame 2. A pair of rollers 5 are provided at opposing positions, and the rollers 5 can be opened and closed by placing the aforementioned projections 6, 6 on the lid side. Therefore, the terminal ends 6a, 6a of the protrusions 6, 6 are connected to the roller 5,
It cuts off just before 5. It is preferable that the lower surfaces of the terminal ends 6a, 6a are sloped. For this roller 5, it is better to use hard synthetic resin rather than metal for rust prevention, and
The shaft 5a is also made of stainless steel or the like. 9 is the lid body 1
A box part provided at the upper part of the other end side, 10 a hook hole for inserting a lid opening tool formed therein, 2e a roller accommodating part protruding from the vertical frame 2a of the frame body 2 for accommodating the roller 5, 2f 2g is a similar lower slope, and 11 is interposed between the frame 2 and the roller 5 like a thrust bearing, and the roller 5 is tightened by tightening the shaft 5a. A resin laminated plate 12 prevents the plate from being fixed, and reference numeral 12 indicates an appropriate number of bolts for adhering concrete or the like provided on the bottom surface of the dish-shaped portion 1a.

In the above configuration, in order to remove the lid 1, use a lid opening tool (not shown) to lift the other end B of the lid 1 to the upper edge of the frame 2 and slide it up. Rollers 5, 5 provided with 6, 6 on the inner periphery of the frame 2
At the tip A of the lid, the protrusions 3, 3 can be pulled up onto the sliding edge 4b on the outside of the edge 4. Therefore, the lid 1 receives only rolling friction from the rollers 5, 5 at the other end B, and receives friction from the protrusions 3, 3 at the tip A, making it possible to open or close the lid very easily.

Therefore, the labor involved in opening and closing the manhole is significantly reduced, and the operating force can be fully controlled to carefully open and close the cover 1. For example, when the cover 1 has interlocking tiles (blocks), etc. Even if it is a thing, it will not be damaged by the impact when opening and closing.

[Brief explanation of the drawing]

The drawings show an embodiment of the manhole mechanism according to the present invention, in which Fig. 1 is a longitudinal sectional view, Fig. 2 is a partially omitted plan view, and Fig. 3 is a sectional view of one end (tip) side. FIG. 4 is a sectional view of the roller portion, and FIG. 5 is a plan view of the main part. 1...Lid body, 2...Frame body, 3...Protrusion, 4...
Edge, 5...roller, 6...projection.

Claims (1)

[Claims for Utility Model Registration] (1) Consisting of a square lid 1 and a frame 2 that supports it, there are protrusions 3, 3 on both left and right ends of the lid 1.
At the same time, edges 4, 4 on which the protrusions 3, 3 slide are formed on the inner periphery of the frame 2, and a pair of rollers 5,
5 are provided rotatably facing each other, and a pair of protrusions 6, 6 are provided on both left and right sides of the lid body 1, which slide by the rollers 5, 5 during opening and closing. (2) The manhole mechanism according to claim 1, in which the protrusions 3, 3 are provided at the tips of the pair of protrusions 6, 6.