JPH0312834Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention has a large number of ventilation holes that are placed almost flush with the ground over openings or grooves into the ground surface such as entrances and exits of caves and underground holes. This invention relates to gratings, and in particular to grating fixing devices where multiple gratings are laid side by side.

[Conventional technology]

In conventional gratings, even when multiple gratings are laid out side by side as shown in Figure 6, each grating is placed on both sides of the inner edge frame provided on both sides of the upper part of the hole. , bolts are passed through bolt holes provided at the four corners of each grating and fixed to the inner frame.

[Problem that this idea attempts to solve]

Therefore, when fixing a plurality of these gratings, each grating has to be fixed with bolts one by one, making the work extremely complicated. In addition, the bolthole may come off due to the vibrations of vehicles running on it, which is not desirable for traffic or aesthetic reasons. Furthermore, there are recesses around the head of the bolt for fitting tools and tightening the bolt, and when this grating is installed on the road surface, there is a risk that the heel of a passerby's high-heeled shoes may get caught in each of these recesses. Yes, it is dangerous. Additionally, a third party can easily remove Voltro and gain access to the interior. Therefore, it is better to have as few bolt holes and recesses as possible.

[Means for solving problems]

This idea was made in consideration of these points, and in the case where multiple gratings are laid side by side at the top of the hole, each grating other than one end of the hole slides on the inner edge frame on both sides of the top of the hole. Then, a key-shaped locking body provided on the bottom surface of each grating is locked to a claw protruding from each inner edge frame, and only one end of the grating can be locked to a hole from above the ground surface using an appropriate locking device. A fixing device for side-by-side gratings is provided.

That is, this invention places both sides of each grating on the inner edge frames on both sides of the upper part of an opening to the ground surface such as a cave or an underground hole, and when multiple gratings are installed side by side, the hole of each inner edge frame is A claw protruding inward is provided at each grating mounting location except for the grating placed over one end, and a claw that can be freely engaged with each of the above-mentioned claws is provided on the lower surface of each grating except for the grating placed over one end of the hole. Key-shaped locking bodies are provided with openings facing both sides of each grating, and the grating that covers one end of the hole is provided with a locking device for the hole that can be operated from above the ground surface.

[Effect]

Therefore, in order to fix a plurality of gratings to this opening hole, each grating other than the grating to be placed over one end of the hole is placed on both sides of the inner edge frame on both sides of the upper part of the hole, and is slid on the inner edge frame. When these gratings are laid side by side from the other end of the hole, the key-shaped locking bodies on both sides of each grating are locked with claws protruding from the inner edge frames on both sides. This fixes each grating from upward movement. Thereafter, a piece of grating having a suitable locking device is fitted into one end of the hole, with both sides placed on the inner edge frames on both sides, and the grating is fixed in the hole by the locking device. This fixes every grating in the hole opening and does not move vertically or horizontally.

〔Example〕

An embodiment of this invention will be described below with reference to the drawings.

Reference numeral 1 indicates a hole opening into the ground surface, and reference numeral 2 indicates an inner edge frame provided on both sides of the upper part of the hole 1, and each grating 3 consisting of a lattice-like frame is attached to the inner edge frame 2 on both sides.
It is placed on both sides of the 4 is each grating 3 other than grating 3' placed on one end of hole 1
These claws 4 are horizontally projected inward from the inner edge frame 2 into the hole 1 at each mounting location, and these claws 4 are opposed to each other on the inner edge frames 2 on both sides to form a pair. .
Reference numeral 5 denotes a key-shaped locking body provided on both sides of the bottom surface of each grating 3 with each opening facing toward both sides. 2, it can be freely locked to each of the claws 4. Furthermore, the grating 3' that covers one end of the hole 1 does not have these key-shaped locking bodies 5, but has a locking device (not shown) for the hole 1 that can be operated from the ground surface. .

In the case of this embodiment, first, as shown in FIG.
Slide it on the inner edge frame 2 and push it away. As a result, the key-shaped locking bodies on both sides of the grating 3 are locked to the respective claws 4 of the inner edge frame 2 on both sides. When each grating 3 is arranged in order from the other end of the hole 1 in this way,
Each grating 3 is locked to a claw 4 and does not move in the vertical direction. Thereafter, as shown in FIG. 4, a grating 3' having a locking device is attached to one end of the hole 1.
Both sides are placed on the inner edge frame 2 and fitted, and this grating 3' is fixed in the hole 1 by a locking device. As a result, each of the gratings 3 and 3' does not move vertically or horizontally, and is fixed as a cover for the hole 1.

In addition, in order to remove these gratings 3 and 3' from the top surface of the hole 1, remove the grating 3' at one end.
Release the locking device and insert this grating 3' into hole 1.
If the other gratings 3 are removed horizontally, each grating 3 is easily removed, and the upper surface of the hole 1 is opened.

Although the following example is a case in which a plurality of gratings are arranged in a line, this invention can also be used in a case in which a plurality of gratings are arranged in a line. That is, as shown in FIG. 5, a large number of gratings a, b, c, d, e, f,
Even when gratings g, h, i, and j are lined up, a locking device that can be operated from the ground surface is provided only on gratings e and j at one end of each row, and the other gratings a
~d and f~i shall be fixed by a key-shaped locking body and a claw.

[Effect of idea]

This invention has the above-mentioned configuration, and all gratings other than gratings that fit into one end of openings or grooves on the ground surface such as entrances and exits of caves and underground holes have key-shaped locking bodies attached to the inner edge frames on both sides of the hole. Each grating is fixed by being engaged with a protruding claw, and only one end of the grating is provided with an appropriate locking device that can be operated from the ground surface to fix or lock the grating. This greatly simplifies the work of covering and fixing a plurality of gratings over the openings, and improves the workability and economy. Furthermore, even if the locking device for the grating that fits into one end of the opening hole is bolted, compared to conventional methods where bolts are used for all gratings, the number of bolted parts is drastically reduced, and the number of bolts attached to the shoes of passersby is drastically reduced. There is a very low chance that your heel will get caught, and since there are few bolted parts, there is little chance of the bolts coming loose, making it safer.

[Brief explanation of drawings]

Fig. 1 is a plan perspective view showing a part of the grating of this invention placed on the opening hole, Fig. 2 is a longitudinal sectional view of the same, and Fig. 3 is a bottom perspective view of part of the grating of this invention. Fig. 4 is a plan perspective view showing a state in which a grating is placed at one end of the opening of this invention, Fig. 5 is a plan view of another embodiment of this invention, and Fig. 6 is a plan perspective view of a conventional example. It is. In the figure, 1 is a hole, 2 is an inner edge frame, 3 and 3' are gratings, 4 is a claw, and 5 is a key-shaped locking body.

Claims (1)

[Scope of utility model registration request] In the case of a plurality of gratings installed in parallel with both sides of each grating placed on the inner edge frame on both sides of the upper part of the opening hole to the ground surface such as a cave or underground hole, the grating part that covers one end of the opening hole of the inner edge frame. A claw protruding inward is provided at each grating placement location, except for the grating that covers one end of the hole, and a key-shaped locking body that can freely engage with each of the claws is provided on the bottom surface of each grating other than the grating that covers one end of the hole. , a plurality of side-by-side gratings characterized in that the openings are provided on both sides of each grating, and the grating that covers one end of the hole is equipped with a locking device for the hole that can be operated from the ground surface. Fixation device.