JPS6220522Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a lid opening/closing mechanism for an underground structure.

The purpose of this invention is that when the lid is closed, it is automatically locked, and when the lid is opened, the lock can be removed with a pry bar and the lid can be pulled up, and the locking mechanism is provided in the pry hole on the periphery of the lid. It is therefore an object of the present invention to provide a lid opening/closing mechanism for an underground structure that can eliminate the conventional hand hook hole.

That is, in the present invention, a projecting edge 3 is formed on the inner periphery of the frame 2 that receives the edge 1' of the lid 1, and the projecting edge 3 is formed on the lower surface of the edge 1' near the pry hole 4 of the lid 1 in the forward position. A holding member 7 of a sliding rod 6 is provided in a steeply outwardly inclined state, and is provided with a locking hook 5 that locks at the bottom and slides toward the center of the lid body to unlock when retracting. This is a lid opening/closing mechanism for an underground structure in which a sliding rod 6 is provided with a protrusion 9 that abuts a stopper 8 formed on a member 7 and locks tools when the lid is opened. In the illustrated embodiment, the sliding rod 6 with the locking hook 5 is slidable on a retaining member 7 with a cross-section inclined from the inside toward the outside near the lid edge 1'. It is fitted into
The front surface has a protrusion 9 that abuts against a stopper 8 formed at the lower end of the holding member 7.
It also has a locking function that pushes up. Reference numeral 11 denotes a protrusion provided on the lower inner peripheral edge of the pry hole 4, and engages with a locking recess 12 formed at the tip of the pry bar 10. In order to pull out the lid 1, a locking recess 12 may be provided on the lid side and a protrusion 11' may be provided on the pry bar 10 (FIG. 1). Furthermore, instead of extending the protrusion 11 to the edge of the pry hole 4, the vertical edge 1'' hanging from the periphery of the lid body 1 is cut out at the pry hole 4 part, and the inside of the vertical edge 1'' is cut out. It is also possible to have a structure in which the tip of the pry bar 10 is hooked. In this case, the tools for opening the lid include L-shaped tools as shown in Figure 1.
It is preferable to provide a tip shape such as T-shape. In the figure, reference numeral 13 indicates a receiving piece for the lid 1 which is protruded from the projecting edge 3 of the frame 2.
In the illustrated embodiment, the holding member 7 of the sliding rod 6 is tilted so that the sliding rod 6 automatically advances downward due to its own weight.
The holding member 7 and the sliding rod 6 may be simply mounted diagonally and their angles may be varied. A curved shape is also possible. In the figure, 14 indicates a plug that closes the pry hole 4 from the outside. Note that the number of pry holes and the lid opening/closing mechanism described above is not limited to one.

With the above configuration, the frame 2 is connected to the lid 1.
When the opening is closed, the slope 5a of the locking hook 5 passes through the flange 3, and even if they touch, the sliding rod 6 temporarily retreats and is positioned below the flange 3, automatically locking the hook. Become. Furthermore, by fitting a stopper 14 made of rubber or the like into the pry hole 4, it is possible to prevent rainwater, sand, etc. from entering. Even if the stopper were to be opened, in this state it would not be possible to open the lid even if one tried to pull it up using a normal handcuff or pry bar. Only by inserting the tip of a tool, i.e., the pry bar 10, through the pry hole 4 and pushing up the projection 9 that it hits, can the sliding rod 6 be retracted backward and upward, using the projection 10' of the pry bar 10 as a fulcrum. By pushing down the other end of the pry bar 10, the lid body 1 can be lifted, and the locking recess 12 of the pry bar can be engaged with the protrusion 11 to be pulled out.

Therefore, according to the present invention, the lid 1 can be automatically locked and closed, and when the lid is opened, it can be unlocked and pulled out using a single tool, which improves operability. Good and no risk of theft. In particular, since the locking mechanism provided on the back side of the lid body 1 at the periphery has a steep slope, the sliding rod 6 can always be kept in a secure locked state by using itself as a weight, and its protrusion 9 hits the stopper 8. Since it is a locking member and also a locking member for a tool such as a pry bar when opening the lid, the structure is streamlined.Moreover, when the protrusion 9 is moved in the unlocking direction by a tool, the direction is Since it coincides with the opening direction of the lid, there is no need to change the operating direction when unlocking and opening the lid, and there is no need to change tools, so the work can be carried out smoothly. In addition, the conventional hand hook hole is no longer necessary, and only a pry hole is required, so rainwater can be removed.
It also has the characteristic that the inflow of sediment is extremely reduced.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention. Figure 1 is a perspective view of the main part, Figure 2 is a bottom view of the lid, Figure 3 is a sectional view, and Figure 4 is the main part of the lid from the center. It is a rear view. 1... Lid, 1'... Edge, 2... Frame, 3...
...Protrusion, 4...Pry hole, 5...Latching hook, 6...
Sliding rod, 7... Holding member, 8... Stopper, 9
……protrusion.

Claims (1)

[Scope of utility model registration request] A ridge 3 is formed on the inner periphery of the frame 2 that receives the edge 1' of the lid 1, and a ridge 3 is formed on the lower surface of the edge 1' near the pry hole 4 of the lid 1, and engages under the ridge 3 in the forward position. stop,
A holding member 7 of a sliding rod 6 equipped with a locking hook 5 that slides toward the center of the lid to unlock the lid when retracting is provided in a steeply outwardly inclined state, and a stopper formed on the holding member 7 is provided. This lid opening/closing mechanism for an underground structure is provided with a protrusion 9 on a sliding rod 6 which impinges on the sliding rod 8 and locks tools when the lid is opened.