JPH0259892B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a lid opening/closing device used for accessing underground structures such as underground ditches, public ditches, and manholes from above ground.

(Prior Art) Various types of lids for accessing underground structures from above ground are known.

Traditional lids are either hinged on one side to the receiver or the lid is detachable from the receiver.

(Problems to be Solved by the Invention) With the above-described conventional lid, when an operator enters or exits the underground structure, the operator must lift or rotate the heavy lid to open and close the opening of the receiving frame. Therefore, it takes time and effort to open and close the lid, and it is not possible to deal with emergencies. Furthermore, when the lid is closed, the lid cannot be opened from inside the underground structure, so if a worker remains inside the underground structure, he or she may not be able to get out to the ground.

(Means for Solving the Problems) The present invention has been proposed in view of the above, in which a receiving piece is extended to a part of two opposing sides of a quadrilateral opening formed in a receiving frame, and the said opening is A roller and a support piece are provided on opposite sides of the lid frame to be opened and closed so as not to overlap the roller, and the lid frame is supported by being positioned on each side of the lid frame to receive the roller and the support piece. A downward link piece is provided on the rail, this link piece is pivotally connected to a bearing provided on the lower surface of the receiving frame, and due to the action of the link piece described above, the rail is positioned within the opening and the opening is closed with a cover material. with the lid closed,
By making it possible to convert between the closed lid state in which the rail rises to the top of the receiving frame and sliding the lid frame along the rail to open the opening, the lid frame can be safely and easily slid to open the receiving frame. The opening can be opened and closed, and the opening can be opened and closed by sliding the lid even from inside the underground structure.

(Example) The present invention will be explained below with reference to embodiments of the drawings.

Reference numeral 1 denotes a quadrilateral receiving frame installed on the ground surface, a quadrilateral opening 2 is formed in the receiving frame 1, and receiving pieces 4 are attached to the lower edges of two opposing sides 3, 3 of the opening 2. It extends horizontally and toward the inside of the opening 2.
In the embodiment shown in the drawings, the receiving pieces 4 are formed at both ends of the side 3 and at a part of the length, and adjacent receiving pieces 4, 4
There is a gap 5 between them. Therefore, the spacing portions 5 are located on the left and right sides of the side 3.

A lid frame 6 is attached to the opening 2 so as to be openable and closable. The lid frame 6 has a quadrilateral shape that almost covers the opening 2, and rollers 8 are attached to the left and right sides of the two side surfaces 7, 7 corresponding to the sides 3 of the opening 2. The mounting position of this roller 8 corresponds to the spacing section 5 when the opening section 2 is closed with the lid frame 6.

Further, support pieces 9 are extended from each side surface 7 of the lid frame 6 so as to be located slightly above the lower surface of the roller 8. This support piece 9 has a side surface 7 excluding the roller 8 portion.
It extends almost the entire length.

A rail 10 having a U-shaped cross section is positioned on each side surface 7 of the lid frame 6 described above. This rail 10 has side 7
The length of the lower piece 1 of the rail 10 is approximately equal to the entire length of the rail 10.
1 is formed with a notch 12 at a position that coincides with the roller 8 in the closed state, and the roller 8 and support piece 9 of the lid frame 6 are housed inside the rail 10.

A shaft stopper 13 is vertically provided near the end of the lower surface of each of the rails 10 described above, and the tip of a link piece 14 is pivotally attached to this shaft stopper 13. The other end of the link piece 14 is pivoted by a shaft 16 to a bearing 15 which is vertically provided on the lower surface of the receiving frame 2 near both ends of each side 3 of the opening 2. Therefore, the rails 10 located on each side surface 7 of the lid frame 6 are supported by the left and right link pieces 14, 14, but the link pieces 14' pivoted on one end of both rails 10 are lower than the shaft 16. and a handle 18 is provided between the extension portions 17. Therefore, this handle 18 is located below the receiving frame 1,
When the handle 18 is rotated, the link piece 14' is also rotated at the same time.

Shallow recesses 19 are formed on the left and right sides of the upper surface of the lid frame 6, and a gate-shaped handle 20 that can stand upright or fall into the recess 19 is provided. Further, on the bottom surface of the tip of the lid frame 6, a handle 21 is provided facing downward and serves as a stopper when the lid is opened and for sliding the lid frame 6.

A key mechanism 22 is provided at the tip of the lid frame 6, and when the lid is closed, the key mechanism 22 locks on the receiving frame 1 and locks the lid frame 6.
It is designed so that it does not come off.

The present invention has the above-described structure, and in the closed state, the lid frame 6 is fitted into the opening 2 of the receiving frame 1, as shown in FIGS. 4, 5, and 6. In this state, each roller 8 of the lid frame 6 is connected to the cutout portion 12 of the rail 10.
Since it faces the space portion 5 of the receiving frame 1, it is not supported. However, the supporting piece 9 of the lid frame 6 is
The rail 10 is placed on the receiving piece 4 of the receiving frame 1. Further, a receiving piece 23 extending from the edge of the opening 2 of the receiving frame 1 supports the edge of the lid frame 6 from below.

Therefore, since the lid frame 6 is firmly supported by the receiving piece 4 and the receiving piece 22, it can sufficiently withstand even a large load and does not move slightly even when a vehicle passes by. . Moreover, since the lower surface of each roller 8 is not supported by anything, it will not be destroyed by the load of the lid frame 6.

On the other hand, in order to remove the lid frame 6 from the opening 2 of the receiving frame 1 to open the lid, either from above the lid frame 6 on the ground or from below the lid frame 6 inside an underground structure. Can be operated.

When operating from above the lid frame 6, the left and right handles 20, 20 are made to stand upright, and the lid frame 6 is moved along the length direction of the rail 10 while grasping the handles 20 and lifting the lid frame 6. With this operation, the rail 10
By the rotation of the link pieces 14, 14' with the shaft 16 as a fulcrum, the link pieces 14, 14' move horizontally while rising together with the lid frame 6, and when they have sufficiently risen and moved, the ends of both rails 10 are transferred to the upper surface of the receiving frame 1. It is supported by each link piece 14, 14'.

Therefore, the lid frame 6 is connected to the rail 10 by the handle 20.
When the rail 10 is pulled out as shown in FIG.
While fixed, the lid frame 6 slides and the opening 2 opens wide.

On the other hand, when opening the lid frame 6 from below, the handle 18 is located below the receiving frame 1, so grasp the handle 18 and rotate it downward as shown by the arrow in FIG. . By this operation, both link pieces 14', 14' rotate about the shaft 16, and as each rail 10 moves upward, both link pieces 14, 14 also rotate about the shaft 16. and,
When the handle 18 is rotated sufficiently downward, the ends of both rails 10 will be placed on the upper surface of the receiving frame 1 and supported by the respective link pieces 14 and 14' as before, so that the lid frame 6 can be moved to the rail by the handle 21. It is only necessary to slide it so that it is removed from 10.

In any of the above operations, when the lid frame 6 slides sufficiently, the handle 21 comes into contact with the edge of the opening of the receiving frame 1 and stops, and one of the rollers 8 is located within the rail 10. Therefore, when closing the lid, slide the lid frame 6 so as to insert it into the rail 10. When the lid frame 6 is fully accommodated in the rail 10 and each roller 8 is positioned within the cutout portion 12, the handle 18 or Lower the lid frame 6 while moving it with the handle 20, and open the opening 2.
Just fit it inside.

Note that when changing the closed state to the open state from the bottom of the lid frame 6, when the lid frame 6 is slid with the handle 21, the handle 2
1 may be pinched by the edge of the opening 2 of the receiving frame 1, so a downward-facing stopper (not shown) is provided near the handle 21 so that the handle 21 can be held in the fully open state.
A gap may be formed between the opening and the edge of the opening.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and can be modified in any manner without departing from the gist of the claims.

(Effects of the Invention) In summary, the present invention allows the rail supporting the lid to move up and down by link pieces, and when rising, slides the lid to open the opening of the receiving frame.
Since the opening can be closed by fitting the lid into the rail and lowering the rail, opening and closing the lid is extremely easy and safe, and is particularly effective for large and heavy lids.

Furthermore, the present invention is not limited to covers for underground ditches, public ditches, underground structures, and ventilation hole covers, but can be used as a four-sided cover for any underground structure.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view with the lid closed, FIG. 2 is a plan view with the lid open, FIG. 3 is a partially exploded plan view, and FIG. 1--line enlarged sectional view, FIG. 5 is a front view with the lid closed, FIG. 6 is a side view of the same as above, FIG. 7 is a front view of the same with the lid open, and FIG. 8 is a side view of the same as above, FIG. 9 is a cross-sectional view of a part of the lid material. 1... Receiving frame, 2... Opening, 3... Side, 4... Receiving piece, 5
...Gap part, 6...Lid frame, 7...Side surface, 8...Roller, 9
... Support piece, 10... Rail, 14, 14'... Link piece, 15... Bearing.

Claims (1)

[Scope of Claims] 1. Receiving pieces are extended to parts of two opposing sides of a quadrilateral opening formed in the receiving frame, and rollers are provided on opposing sides of the lid frame that opens and closes the opening, A supporting piece is provided so as to be detached from the roller, and a downward link piece is provided on the rail that supports the lid frame by being positioned on each side of the lid frame to receive the roller and the supporting piece, and this link piece is attached to the receiving frame. It is pivotally mounted on the shaft bearing provided on the lower surface, and due to the action of the link piece described above, there are two states: the closed state where the rail is located within the opening and the opening is covered with the lid material, and the closed state where the rail is raised to the top surface of the receiving frame. A lid opening/closing device for an underground structure, characterized in that a lid opening/closing device for an underground structure can be switched between a closed lid state and a closed lid state in which an opening is opened by sliding a lid frame along a rail. 2. The underground structure lid opening/closing device according to claim 1, wherein the link is provided with a handle that can be operated from inside the underground structure. 3. The lid opening/closing device for an underground structure according to claim 1, wherein the rail has a notch into which the roller fits when the lid is closed.