JPS61130583A - Opening and closing apparatus of access lid body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to an opening/closing device used for opening and closing a lid body that is openably and closably attached to an entrance provided in a tunnel in which a cable is laid. Regarding.

(Technical background of the invention and its problems) Fig. 7 shows a part of a tunnel in which cables are laid, and ventilation is provided continuously at the tunnel entrance/exit 1 and the tunnel entrance/exit L. It has an opening 2 for use. A lattice 3 is fixed to this opening 2, and a tunnel entrance/exit l is fixed to one end of the lattice 3.
A grid-like lid body 4 for opening and closing is hinged to the opening/closing convolution.

By the way, since the lid 4 and the grid 3 are usually made of steel or the like, the lid 4 also has a weight of 20 to 30 kg. Conventionally, this lid body 4 is simply hinged at one end to the lattice 3 as described above. Therefore, the operator must lift the lid 4 against its weight in order to enter the tunnel, which requires a great deal of effort and may cause problems such as back pain. arise. In addition, when the tunnel entrance/exit l is provided on a sidewalk or in the vicinity thereof, the tunnel entrance/exit 1 is temporarily closed with a cover body 4 to ensure the safety of pedestrians. Since the body 4 is simply connected by a hinge, a worker can gradually rotate downward while supporting the heavily loaded lid body 4 in an unstable position such as holding on to a ladder inside the tunnel entrance/exit l. However, it is necessary to lock the cover body 4 to the tunnel entrance/exit 1, and after finishing work in the tunnel, it is necessary to push the lid 4 in an unstable position within the tunnel entrance/exit 1 and rotate it again. be. Therefore, in this case, not only will the worker be forced to put in even more effort, but there is also a danger that the worker may fall inside the tunnel entrance 1 or have his or her fingers caught in the lid 4. there were.

(Object of the Invention) The object of the present invention is to provide a lid body for accessing a sinus canal that can be easily opened and closed even if the lid body is large in size and can be held in a predetermined open position. Our objective is to provide a switchgear.

(Summary of the Invention) The present invention includes a counterbalancing weight attached to a support member extending outwardly from the joint end of the lid, and the weight of the weight facilitates rotation of the lid. A stopper member pivotally supported on the lower surface and a rotating member pivotally supported near the lower surface on the joint end side of the lid body are rotatably connected in a substantially 〈 shape on the lower surface of the lid body. By rotating the member upward with the operating handle, the stopper member pushes up the lid, and the connecting side of the stopper member comes into contact with the lower surface of the lid, thereby holding the lid in a predetermined open position. It is characterized by being made to obtain.

(Embodiments of the Invention) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Figure 1 shows the tunnel entrance/exit 1 and the fliiiil entrance/exit 1.
niI! A continuous ventilation opening 2 is shown, a grid 3 is fixed on the opening 2, and the tunnel entrance/exit 1 is closed with a lid 4 locked. As shown in FIG. 2, the lid body 4 is formed in a lattice shape, one end 4A of which is hinged to the lattice 3, and is manufactured from steel together with the lattice 3.
It has a weight of g.

An opening/closing device 5 according to the present invention is provided on the lower surface side of the lid body 4. That is, the opening/closing device 5 of the present invention is shown in FIGS.
As shown in the figure, one end 4 of the lid body 4 is hinged.
A pair of support members 6.6 are provided which are fixed to the lower surface of the A side by welding or the like. These support members 6 extend along the lower surface toward the lattice 3 side, and each has a balancing weight 7 attached to its tip. Each weight 7 has a weight of 10 kg. A rotating shaft 8 is disposed in parallel with the lower surface of the lid 4 near the lower surface of the lid 4 on the one end 4A side. Both ends of this rotating shaft 8 are rotatably supported by opposing wall surfaces IA of the tunnel entrance/exit l. On both ends of the rotating shaft 8,
One end of each sector-shaped rotating member 9 is fixed by welding or the like. An operating handle 11 for applying rotational force to one rotating member 9 of the rotating shaft 8 is adjusted by welding or the like, and this operating handle 11 is turned downward. It is growing. On the other hand, protrusions 4a, 4a are fixed by welding or the like to both sides of the lower surface of the rotating other end 4B of the lid body 4, and one end 10a of a stopper member 10 is rotatably supported on each protrusion 4a. ing. Each stopper member 10 extends diagonally downward, and the other end 10b is rotatably connected to the other end on the rotating member 90 yen 1 side at a position away from the lower surface of the lid 4.

Next, the operation of the opening/closing device 5 of the present invention will be explained in relation to the lid body 4.

When the operating handle 11 is turned toward the lower surface of the lid 4, that is, toward one side of the lid 4, the rotating shaft 8 rotates and both rotating members 9.9 rotate upward, so that each stopper member 10. 1
0 (7) One end 1'oa, the other end 4B of the lid body 4 by tOa
A pressing force is applied to the By the way, since the weight 7.7 is attached to the one end 4A side of the lid 4, a couple force relative to the gravity of the weight 7.7 acts on the other end 4B of the lid 4. Therefore, by simply operating the operating handle 11 as described above with a small force, one end 10a of each stomper member 10.
, 10a, the other end 4B of the lid 4 can be pushed and moved once as shown in FIG. Then, when the other end 4B of the lid body 4 rotates, the one end 10 of the stone bar member 10
Since the distance between a and the rotating shaft 8 increases, the other end 10b of the stopper member 10 gradually approaches the lower surface of the lid 4.

When the operating handle 11 is continued to be rotated and the other end 4B of the lid 4 is rotated approximately 80 degrees with respect to the closed position of the lid 4, the other end 10b of the stopper member 10 is moved to the lid 4 as shown in FIG. However, when the operating handle 11 is further turned, the other end 4B of the lid body 4 rotates slightly more than 80 degrees (see the dashed line in FIG.
It is located on a straight line connecting a and the rotation axis 8. Therefore, it becomes impossible to rotate the other end 4B of the lid 4.

Then, when the operating handle 11 is turned slightly after that, the other end 10b of each stopper member 10.10, the connecting portion on the 10b side is pressed against the lower surface side of the lid body 4, as shown in FIGS. 3 and 4. As the other end 4B of the lid 4 returns to the rotational position of approximately 80 degrees, the other ends tob and tobom connecting portions of each stopper member 10 and 10 come into contact with the lower surface of the lid 4. Therefore, the lower surface of the lid body 4 is supported by the other end 10b of each stopper member 10.degree. 10, the lOb side connecting portion, so that the lid body 4 is held in the open state.

When the operating handle 11 is turned downward, the other end 10b of each stopper member io, 10 (7), the 10b side connecting portion separates from the lower surface of the lid 4, so that the other end 4B of the lid 4 moves downward. As the lid body 4 rotates, it locks onto the tunnel entrance/exit 1 and closes the entrance/exit 1. Also in this case, since the weight 7.7 is attached to the lid body 4, the operating handle 11 can be operated with a small force.

The opening and closing operations of the lid body 4 by operating the operating handle 11 have been described above, but even if the lid body 4 is lifted or pushed down directly by hand from outside the sinus entrance/exit l, the weight 7.7
Since the 1M body 4 is attached, it is possible to open and close the 1M body 4 with a small force and to hold it in the open state.

In the embodiment L, the rotating member 9 has a sector-shaped shape, but it may also have a rod-like shape, for example.

Alternatively, the operating handle 11 may be directly fixed to the rotating member 9, the rotating wheel 8 may be fixedly supported, and the rotating member 9 may be rotatably supported on the rotating shaft 8. 1
1, the rotating member 9 can be rotated, and the same effect can therefore be obtained.

Furthermore, although a pair of rotating member 9 and stopper member 10 are used in the above embodiment, the lid 4 can be opened and closed using one rotating member 9 and stopper member lO.
In this case, these members 9, 10 are provided in the center of the lid 4.

It goes without saying that the opening/closing device of the present invention can be used not only for opening/closing a lid for entering and exiting a sinus passage but also for opening/closing a lid provided in a conduit or other places.

(Effects of the Invention) According to the present invention, a stopper member is provided, in which a weight balanced with the weight of the lid body for accessing the tunnel is attached, and the stopper member is pivotally supported on the lower surface of the lid body.
By rotatably connecting the rotating member pivotally supported near the lower surface of the coupling end side of the lid body, which is pivotably coupled, in a substantially dogleg shape,
Inside the tunnel entrance, the lid body is rotated via the stopper member by simply rotating the rotating member with a small force using the operation handle, and the side connected to the rotating member of the stopper member is connected to the bottom surface of the lid body. The lid body can be held at a predetermined rotational angle by being brought into contact with the lid body. Further, outside the tunnel entrance/exit, the lid can be similarly rotated and held at a predetermined rotation angle by directly lifting or pushing down the lid with a small force by hand. Therefore, even heavy lids can be opened and closed extremely easily, and the lid can be held open, allowing workers to safely and easily enter and exit the tunnel entrance. be able to. Since the opening/closing device of the present invention has a simple structure consisting mainly of a weight, a rotating member, and a stopper member, it is not only less prone to failure, but also easy to assemble and can be provided at low cost. .

[Brief explanation of the drawing]

FIG. 1 is a front view of the opening/closing device according to an embodiment of the present invention when the lid is closed, FIG. 2 is a perspective view of the opening/closing device shown in FIG. 1 when the lid is closed, and FIG. 3 is the same as that shown in FIG. 1. 4 is a perspective view of the opening/closing device shown in FIG. 1 when the lid is open, and FIGS. 5 and 6 are explanatory views of the operation of the opening/closing device of the present invention, respectively. , and FIG. 7 are perspective views showing how the lid for accessing the sinus canal is joined. 1------------ One tunnel entrance/exit, 4--------- One lid, 6--------- Supporting member, 7--------- Weight, 8 - one rotation axis. 9---------One rotation member, 10------Stopper member, first! ! ! ! 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] In an opening/closing device for a lid body for accessing a sinus passage, one end of which is hinged to an entrance/exit portion of a sinus passage, the support member is provided on the lid body so as to protrude outwardly from the hinge joint end; a balancing peg that is attached to the lid and has a weight corresponding to the weight of the lid, a rotating member that is pivotally supported near the bottom surface of the connecting end of the lid, and a rotating member that is attached to the rotating member. an operating handle that applies rotational force about the pivot point, one end of which is pivotally supported on the lower surface of the rotating end side of the lid, and the other end of which is located at a position away from the lower surface of the lid when the lid is closed; An opening/closing device for a lid for accessing a sinus tract, comprising a stopper member rotatably connected to the other end of the rotary member.