JPH0526126Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a ditch cover, a manhole cover, etc. equipped with a buffer.

(Conventional technology) Conventionally, rectangular lattice-shaped gutter covers constructed on roads and drainage ditches on premises, and manholes installed as inspection holes for underground water supply and sewage systems, water reservoirs, etc. A disc-shaped lid or the like is designed and constructed so as to create a slight gap with the receiving frame. In general, the receiving frame is designed, manufactured, and constructed so that there is a gap of 4 to 6 mm in the case of a lattice-shaped groove cover, and 2 mm in the case of a manhole cover. Therefore, ditch covers and manhole covers (hereinafter referred to as covers) that are installed in places where vehicles, etc. pass through may cause noise due to the contact between the cover and the receiving frame due to the vibrations caused by the passing of vehicles, etc. Occur. Therefore, screws, bolts, and
Methods of fixing with nuts, etc., connecting with hinges, etc., or attaching and fixing leaf springs or elastic bodies in the gaps have been used. However, manhole covers and receiver frames are mainly manufactured from cast iron for reasons such as being strong and rust-resistant, and therefore the dimensional tolerance is ±5 mm for a length of 1000 mm, which is less than that of other industrial products. Even with lattice-shaped gutter covers, which are manufactured from flat steel plates and have relatively good dimensional accuracy, the receiving frame is installed by being buried in the concrete groove, so the gap between the receiving frames can be reduced. It is difficult to install accurately, and when attaching protrusions and leaf springs, which have been proposed for noise prevention, to lids and receiver frames, it is necessary to make adjustments to fit the gaps on site.

(Problems to be solved by the invention) In order to improve these drawbacks, the applicant of the present application applied a donut-shaped or wedge-shaped buffer body, which was previously published as Publication of Utility Model Publication No. 60-42137, to the holder frame of the lid. We have proposed a lid equipped with a buffer that protrudes from a mounting base provided in a mounting hole provided on the opposite side so that the buffer comes into contact with the receiving frame, but we have solved the problem by manufacturing the lid. Over the years, it has become clear that replacing and adjusting the rusty screws, bolts, and nuts is time-consuming, and it has become desirable to improve these points. , and the emergence of even simpler products has come to be expected.

The present invention solves these shortcomings, and in particular makes it easier to attach and replace the buffer, and also allows the contact state of the buffer with the receiving frame to be easily adjusted to match the gap between the lid and the receiving frame, thereby reducing the generation of noise. The purpose is to prevent burns.

(Means for solving the problem) In order to achieve the above objective, as a result of various studies, it was found that on the side facing the receiving frame of the groove, that is, on the cover of a manhole etc. which is in the shape of a disk, an annular structure is installed vertically along the periphery. On the outer surface of the supporting leg, and on the side of the side plate facing the receiving frame for the lid for a rectangular groove, a mounting groove for the buffer is perpendicularly drilled in a dovetail shape, and the center line of the bottom of the mounting groove is Locking holes are provided at regular intervals along the vertical direction, and the shock absorber fits into the mounting groove and slides on the surface of the main body, which has a substantially rectangular trapezoid shape, that is, the outer surface when fitted into the mounting groove. put a shelf on the
This problem can be solved by providing a protrusion on the back surface that engages with the engagement hole, and engages and engages the attachment groove.

The buffer body is preferably made of an elastic material such as natural or synthetic rubber, and a plurality of shelf-like pieces are preferably provided. Also,
For manhole covers that are in the shape of a disc, there are holes on the outer surface of the annular supporting legs that divide the periphery into at least three equal parts, and for covers such as rectangular grooves, there are spaces on the side plate facing the receiving frame. It is best to provide mounting grooves for two locations and install the buffer.

(Embodiment) The present invention will be explained according to an embodiment shown in the drawings.A manhole cover 1 made of cast iron is generally disc-shaped, and an annular support leg 3 is vertically provided along the periphery. Due to the mold, support legs 3 are installed as shown in Figure 1.
is formed so that the tip thereof is tapered, and therefore the outer surface is formed such that the lid surface is positioned outward. As shown in FIG. 2, dovetail-shaped vertically long mounting grooves 4 are bored in the vertical direction at positions that divide the circumference formed by the outer surface of the support leg 3 into at least three equal parts. Locking holes 5 are provided at equal intervals along the center line of the bottom surface of the groove. The mounting groove 4 may be provided in the form of a groove opening on the lower surface and/or the upper surface of the support leg 3. As shown in FIGS. 4 to 6, the buffer body 6 has a substantially rectangular trapezoidal main body with a shelf-like piece 7 protruding from the surface thereof, and a shelf-like piece 7 protruding from the back surface of the main body on the opposite side thereof. A protrusion 8 that locks into the provided locking hole 5 is provided, and is molded from an elastic body such as natural rubber or synthetic rubber. This buffer body 6 has a mounting groove 4 formed on the outer surface of the support leg 8 of the lid 1 as shown in FIG.
Inside, the protrusion 8 is attached to the locking hole 5 of the mounting groove 4 at a position where the shelf-like piece 7 contacts the receiving frame 2 and is slightly bent upward.

In addition, in the case of a rectangular groove cover 11 made of steel plates or the like, for example, a lattice-shaped groove cover, support legs of the manhole cover 1 are attached to the side plate 13 facing the receiving frame 12 as shown in FIG. Attachment grooves 4 and locking holes 5 similar to those provided in 3 are placed at two locations near both ends of the side plates 13 on both sides, and if necessary, also drilled in the side plate on the side of the adjacent lattice groove lid, and the buffer body 6 is attached. It is good. Since the side plate 13 is generally a rectangular flat plate, it is preferable to drill the bottom of the mounting groove 4 so that it becomes deeper downward as shown in FIG. It is also possible to separately fabricate and install a shock absorber attachment part by drilling into the side plate. The size of the shock absorber 6 depends on the size of the lid, but generally it should be about 20 to 30 mm on a side, and it can be easily inserted into the mounting hole by bending it toward the back and compressing it. It would be better if it could be installed.

(Effect of the invention) Since the present invention is constructed as described above, the lid 1
When it is attached to the receiving frame 2, the shelf-like piece of the buffer protrudes and is in contact with the receiving frame 2, so no impact noise is generated due to vibration, and since the buffer is elastic, it can be used even in places with narrow gaps. By pushing the lid into the receiving frame, the shelf-shaped piece of the buffer body bends to the information, so that the lid is fixed to the receiving frame and does not wobble. Also, depending on the clearance, the mounting holes are inclined with respect to the side plate, so the protruding dimension of the shelf can be adjusted by adjusting the mounting position of the buffer, so it can be fixed without wobbling. It is something. Further, since the buffer body is simply fitted into the mounting groove and locked, even if the buffer body loses its elasticity due to aging, it can be easily removed and replaced with a new buffer body.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; Fig. 1 is a partial sectional view of a manhole cover with a buffer attached to it, Fig. 2 is a partial side view showing how the buffer is attached to the cover, and Fig. 3 is a partial cross-sectional view of a manhole cover with a buffer attached. Fig. 2 is a partial sectional view taken along the line A-A, Fig. 4 is a top view of the buffer, Fig. 5 is a side view of the same, and Fig. 6 is a partial sectional view taken along line A-A.
The figure is a perspective view of the same, and FIG. 7 is a partial cross-sectional view when it is applied to a lattice-shaped groove cover. 1... Lid, 2... Receiving frame, 3... Support legs, 4...
Mounting groove, 5...Latching hole, 6...Buffer, 7...Shelf piece, 8...Protrusion, 11...Groove cover, 12...
Receiving frame, 13...side plate.

Claims (1)

[Scope of utility model registration request] In a cast iron manhole cover or a steel plate groove cover, in the case of a disc-shaped manhole cover, the outer circumference of the outer surface of the support leg 3 hanging in an annular shape along the periphery of the cover 1 is at least 3 In the square-shaped groove cover 11, mounting grooves 4 for the buffer body 6 are perpendicularly perforated in a dovetail shape on the side surface of the side plate 13 facing the receiving frame 12 at equally divided positions. Locking holes 5 are provided at equal intervals in the vertical direction along the center line of the bottom surface of the groove formed by the dovetail groove-shaped attachment molded from an elastic material such as natural rubber or synthetic rubber. The main body has a substantially rectangular trapezoidal shape so as to fit into the groove 4 and slide, and a shelf-like piece 7 is provided on the front surface of the main body, and a hook provided in the mounting groove 4 of the lids 1 and 11 is provided on the opposite back surface. A buffer body 6 having a protrusion 8 that locks into a stop hole 5 is provided.
This lid is equipped with a buffer body in which a shelf-like piece 7 of a buffer body 6 is attached to the attachment groove 4 of the lids 1, 11 so that it protrudes outward and comes into contact with the receiving frame 2.