JPS5923089Y2 - Lid for underground structures - Google Patents

Description

[Detailed description of the invention] This invention relates to a lid for underground structures that can be opened using either a crowbar or a key rod.

Covers for underground structures include large iron covers, mounting covers, manhole covers, and underground facility equipment, wiring, etc. that serve to open and close underground objects for water supply and sewage, and openings connecting underground structures and above ground. Iron covers and mounting covers that play a protective role and an opening/closing role, as well as fire hydrant covers, water control valve covers, and gate valves that serve as opening/closing doors that connect buried conduits under roads and their attached equipment to the ground. Various types of lids, air valve lids, power pipe lids, water meter lids, etc. are known.

This lid 1 for underground structures generally opens and closes the opening of a receiving frame 2 provided facing the ground surface, and one side of the lid 1 and the receiving frame 2 are connected by a hinge, and the other side of the lid 1 is connected to the receiving frame 2 by a hinge. A crowbar hole 3 or keyhole is provided for turning and lifting the iron lid.

Therefore, when opening the lid 1 having a crow hole 3, the T-shaped tip 5 of the crowbar 4 is inserted into the crow hole 3.
(Fig. 1), hook the T-shaped tip 5 onto the bottom surface of the crowbar hole 3, and then push down the gripping part on the rear end of the crowbar hole 4 to remove the injection force between the lid 1 and the receiving frame 2. One side of the lid 1 is raised by the action of the lever (Fig. 2), then pulled up (Fig. 3), and one side of the lid 1 is pulled up to the upper surface of the receiving frame 2 (Fig. 4). The lid 1 is released from the receiving frame 2 by turning in the horizontal direction.

It is also possible to pull up the lid 1 sufficiently without turning it in either the left or right horizontal direction, flip it vertically, and release it from the receiving frame.

On the other hand, when opening the lid using the keyhole, after removing the injection force of the lid with the lever action of the crowbar in the same way as above, insert the tip of the key into the keyhole and hook it. After pulling up the key lever and lifting the lid, it is rotated horizontally to either the left or right to release it from the receiving frame.

In any case, the lid must be opened or closed using a crowbar or key rod, but since the structure of the crowbar hole and keyhole are different, there is a risk that the lid will come off if you insert the key rod into the crowbar hole and open the lid. , and you can't insert a crowbar into the keyhole.

In addition, conventionally, a crowbar hole and a keyhole were provided in parallel on the periphery of the top surface of the lid, but in this case, the tip of the crowbar is inserted into the crowbar hole and hooked, and the lid is lifted by lever action. After removing the injection force, it was cumbersome to have to perform a two-step operation of inserting the key rod into the keyhole and turning it upwards. Moreover, the opening area on the top surface of the lid was large between the crowbar hole and the keyhole. Therefore, when it rains or snows, the amount of rainwater flowing into underground structures increases, creating a problem.

The present invention has a crowbar hole and a keyhole arranged vertically, so that the cover for an underground structure can be opened and closed extremely easily using a crowbar or a key rod.

The present invention will be explained below with reference to the embodiments shown in Figure 5 and below.
The lid 11 is maintained in a closed state by biting into the receiving frame 12 with inclined surfaces 13 formed on the outer peripheral surface of the lid 11 and the inner peripheral surface of the receiving frame 12 being in close contact with each other.

In the lid 11 described above, a burl hole 14 is formed in the peripheral edge opposite to the hinge mounting position.

The crow hole 14 has a horizontal hole portion 15 that is opened at the upper peripheral edge of the lid 11 so as to reach the edge thereof, and a horizontal hole portion 15 that is opened as far as the lower part of the side surface 11' of the lid 11 so that the upper end communicates with the edge of the horizontal hole portion 15. It has an inverted letter shape consisting of vertical groove portions 16.

A bag-shaped bottom frame 17 is provided on the lower surface of the lid 11 so as to surround the crowbar hole 14, and the bottom 1 of the bag-shaped bottom frame 17 is
8 has a keyhole 19 located below the crowbar hole 14.

This keyhole 19 is horizontally long like the horizontal hole portion 15 of the crowbar hole 14, but the width of the keyhole 19 is shorter than the horizontal width of the horizontal hole portion 15.

In the middle of the keyhole 19, a swollen diameter portion 20 is formed through which a cylindrical rod of a key rod passes.

To open the lid 11 formed as described above with a crowbar while it is in the closed state, pass the T-shaped tip of the crowbar upward through the horizontal hole 15 of the crowbar hole 14, rotate the crowbar 90', and then open the T-shaped tip of the crowbar. Hang the horizontal rod on the front side of the lower surface of the horizontal hole part 15 and fix it.

Then, the vicinity of the proximal end of the crowbar is supported on the inner surface of the receiving frame 12,
In this state, if you push down the gripping part on the rear end of the crowbar and gradually collapse the crowbar, the lid 11 will gradually lift up due to the lever action.
The injection force removes.

Thereafter, once the crowbar is pulled up and one side of the lid is pulled out to the upper edge of the receiving frame 12, the lid may be opened by vertically inverting it upward or by turning it horizontally to either the left or right.

On the other hand, in order to open the closed lid with a key rod, after removing the injection force of the lid with a crowbar as described above, pass the tip of the key rod a through the side hole 15 of the crow hole 14 until it reaches the keyhole 19. , turn the key rod a by 90 degrees and attach the left and right horizontal rods to the bag-shaped bottom frame 17.
The lid 11 is supported on the lower surface of the bottom part 18 (FIG. 7 or 9), and the key rod a is pulled up to vertically invert the lid 11 or to turn the lid 11 in either the left or right horizontal direction.

In order to close the lid, the lid 11 is vertically turned in the opposite direction, or horizontally to the left or right to close the receiving frame 12.
Just fit it in.

As described above, the present invention has the advantage that the lid can be vertically flipped open or horizontally turned open by removing the injection force using only the crowbar, and can also be opened using a key rod.

In addition, the dirt that has entered the bag-like bottom frame through the crowbar hole can be discharged through the keyhole, and the amount of rainwater that has entered into the underground structure can be minimized.

It has a high practical value, especially when a large number of underground structure covers must be opened and closed, and it also helps protect internal structures and equipment because it reduces the infiltration of rainwater, etc. into underground structures. Become.

[Brief explanation of drawings]

Figures 1 to 4 are schematic diagrams of the case where the lid is opened using a crowbar, Figures 5 to 9 show examples of the present invention, Figure 5 is a plan view, and Figure 6 is a schematic diagram. FIG. 7 is a sectional view taken along line VII-Vll in FIG. 6, FIG. 8 is a front view with half of the main part in section, and FIG. 2 is a plan view seen from below. 11...Lid, 14...Crowbar hole, 15
...Horizontal hole part, 16...Vertical groove part, 1
7... Bag-shaped bottom frame, 18... Bottom, 19
······keyhole.

Claims (1)

[Scope of utility model registration request] A crowbar hole consisting of a horizontal hole and a vertical groove formed on the top and side surfaces of the lid is formed on the peripheral edge of the lid, and a bag-shaped bottom is provided on the bottom surface of the iron lid to surround the crowbar hole. A cover for underground structures that has a keyhole located below the crowbar hole at the bottom of the frame.