JPS61211425A - Cover opening and closing device for underground structure - Google Patents

Abstract

PURPOSE:To open and close the opening of a support frame through safe and easy slide of a cover frame, by a method wherein a roller and a support frame are located to the corresponding sides of the cover frame, a down link is mounted to a rail supporting the cover frame, and an opening and a closed state are controlled by a link piece. CONSTITUTION:A cover frame 6 is openably mounted to an opening 2, and rollers 8 are mounted to a side 7 positioned facing a side 3 of the opening 2. A rail 10 is positioned to the side 7, shaft lock pieces 13 are hung down in the vicinity of the both end parts of the under-surface of the rail 10, and the forward end of a link piece 14 is pivotally attached to the shaft lock pieces 13. Right and left handles 20 are erected upright so that they can be controlled from the upper side of the cover 6. The cover frame 6 is lifted up by grasping the handles 20, which are moved along the direction of the length of the rail 10. This enables the rail, supporting a cover material, to be vertically moved over the link piece, and enables extremely easy control of opening and closing of the cover material.

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 in the receiving frame.

However, it takes time to open and close the lid, making it impossible 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. Provide a downward link piece 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 located in the opening and the lid is closed with the lid material, and the rail is placed inside the receiving frame. By making it possible to convert between the open state where the opening is opened by rising to the top surface and sliding the lid frame along the rail, the lid frame can be slid safely and easily to open the opening of the receiving frame. It 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.

/ is a rectangular receiving frame installed on the ground surface, a rectangular opening 2 is formed in the receiving frame l, and a receiving plate is formed on the lower edge of two opposing sides 3, 3 of the opening Extend horizontally and toward the inside of the opening. In the embodiment shown in the drawings, the receiving pieces μ are formed at both ends of the side 30 and at a part of the middle of the length, and the space between adjacent receiving pieces ≠ and 4L! has. Therefore, this interval part! are located on the left and right sides of side 3.

The lid frame B is attached to the above-mentioned opening λ so that it can be opened and closed. This lid frame t has a quadrilateral shape that almost covers the opening 7, and rollers r are attached to the left and right sides of the two side surfaces 7, 7 corresponding to the side 3 of the opening.

The mounting position of this roller ♂ coincides with the above-mentioned interval when the opening ♂ is closed with the lid frame 6.

Furthermore, support pieces are provided on each side surface 7 of the lid frame t so as to be positioned slightly above the lower surface of the roller r. This support piece extends over the entire length of side f7 excluding the roller r portion.

Each side 7 of the above-mentioned lid frame 6 has a U-shaped cross section rail io.
position. This rail io has a length equal to the total length y of the side surface 7, and a cutout portion 12 is formed in the lower piece ll of the rail IO at a position that coincides with the roller t in the lid closed state, and supports the roller of the lid frame t. The piece is stored inside the rail 10.

A shaft stopper 1 is provided near both ends of the bottom surface of each rail 10 described above.
3 is vertically provided, and the tip of the link piece is pivoted to this shaft stopper piece 13. The other end of the link piece/Q is connected to each side 3 of the opening λ.
It is pivotally connected by a shaft 16 to bearings 13 which are located near both ends of the support frame and vertically installed on the lower surface of the receiving frame. Therefore, the rail io located on each side 7 of the lid frame t is supported by the left and right link pieces /4' and /4C, both of which are supported by the link piece /4'' which is pivoted at one end of the frame 10. extends below the shaft/6, and a nodle/l is provided between the extended portion/rim.Therefore, this handle/1 is located below the receiving frame l, and the handle/1 is located below the receiving frame l.
When the link piece /4C' is rotated, the link piece /4C' is also rotated at the same time.

Shallow recesses /q are formed on the left and right sides of the upper surface of the lid frame 6 described above,
A gate-shaped handle ``J'' which can stand upright or collapse into the depression /9 is provided in the depression /q. Further, at the tip Ti of the lid frame t, there is provided a pull lever 1 facing downward, which serves as a stopper when the lid is opened and for sliding the lid frame t.

A key mechanism 2 is provided at the tip of the lid frame 6, and when the lid is closed, the key mechanism n is engaged with the receiving frame / to prevent the lid frame t from coming off.

The present invention has the above-described configuration, and when the lid is closed, FIG.
As shown in FIG. 5 and FIG. 9g6, the lid frame 6 is fitted into the opening λ of the receiving frame l. In this state, each roller r of the lid frame 6
is the space between the notch 11 of the rail IO and the receiving frame! I am not supported because I am facing this. However, the supporting piece of the lid frame t rests on the lower piece // of the rail IO, and the rail IO rests on the receiving piece μ of the receiving frame l. Further, a receiving piece 3 extending from the edge of the opening λ of the receiving frame supports the edge of the lid frame 2 from below.

Therefore, since the lid frame 6 is firmly supported by the receiving piece μ and the receiving piece, it can sufficiently withstand even a large load, and does not move slightly even when a vehicle passes by.

Moreover, since the bottom surface of each roller r is not supported by anything,
The lid frame 6 will not be destroyed by the load.

On the other hand, in order to remove the lid frame 6 from the opening of the receiving frame l to open the lid, either from the top of the lid frame t on the ground or from the bottom of the lid frame 6 inside the underground structure. Can be operated.

When operating from the upper side of the lid frame 6, the left and right handles X, X are made to stand upright, and the lid frame t is moved along the length direction of the rail 10 while grasping the handle J and lifting the lid frame t. By this operation, the rail IO is connected to the link piece /4C with axis /6 as the fulcrum.
, /4C' moves horizontally while rising together with the lid frame t, and when it rises sufficiently and moves, both rails IO
The tip of each link piece/
e.

It is supported by l da'.

Therefore, when the lid frame 6 is pulled out from the rail 10 by the handle J, the N lid frame t slides while the rail 10 remains fixed, and the opening 6 opens wide, as shown in FIG.

On the other hand, when opening the lid frame t from below, the handle /1 is located below the receiving frame l, so grab this handle /g and turn it downward as shown by the arrow in Figure 5. move. By this operation, both link pieces ta' and 弘弘' rotate about the shaft /6 as a fulcrum, and each rail 10 moves while rising, so that both link pieces /Q.

/Q also rotates around axis /6. And No Ndol 1
5 sufficiently downward, both rails I
Since the tip of O is placed on the upper surface of the receiving frame l and supported by each link piece, /4(', the lid frame can be slid off the rail 10 using the handle l.

In any of the above operations, when the lid frame t slides sufficiently, the handle 21 hits the edge of the opening of the receiving frame l and stops.
One roller r is located within the rail 10. Therefore, when closing the lid, the lid frame 6 is slid so as to be inserted into the rail 10.

When the rollers t are sufficiently accommodated in the rail 10 and positioned within the cutout part 2, lower the lid frame t while moving it using the handle or handle, and fit it into the opening. good.

In addition, when changing the closed state to the open state from the bottom of the lid frame 6,
When sliding the lid frame 6 with the handle 21, the hand holding the handle 2/ may get caught on the edge of the opening λ of the receiving frame l. ),
A gap may be formed between the handle 21 and the edge of the opening in the fully opened state.

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) To summarize, the present invention allows the rail supporting the lid to move up and down by means of link pieces, and when raised, the lid slides to open the opening of the receiving frame. Since the opening can be closed by fitting the lid onto 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.

Further, the present invention is not limited to covers for underground structures such as underground ditches or public ditches, and covers for ventilation holes, but can be used for all types of underground structures as quadrilateral shaped covers.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a plan view with the lid closed, and FIG. 2 is a plan view with the lid opened. Figure 3 is a partially exploded plan view, Figure 4 is Figure 1 ■-I
An enlarged sectional view taken along the V line, 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 open lid, FIG. 8 is a side view of the same as above, and FIG. 9 is a cross-sectional view of a portion of the lid material. /... Receiving frame, λ... Opening, 3... Side, Hiro...
Uke piece! ... Interval part, t... Lid frame, 7... Side surface,
r...Roller, Ri...Support piece, IO...Rail,
/4(, /Q'...link piece, /&...shaft bearing.

Claims (3)

[Claims] (1) A receiving piece is extended to a part of two opposing sides of a quadrilateral opening formed in a receiving frame, and a roller is attached to opposing sides of the lid frame that opens and closes the opening, and a roller is attached to the opposing side of the lid frame that opens and closes the opening. A support piece is provided as shown in FIG. Pivotally attached to the shaft bearing, due to the action of the link piece described above, the rail is located in the opening and the lid is closed with the lid material, and the rail rises to the top of the receiving frame and the lid frame is closed to the rail. A lid opening/closing device for an underground structure, characterized in that the lid opening/closing device for an underground structure can be switched between an open lid state in which an opening is opened by sliding along the lid. (2) The lid opening/closing device for an underground structure 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.