JPH0240102Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a manhole cover device comprising a circular lid body and a receiving frame for the lid body.

[Technical background of the invention and its problems]

Conventionally, a circular receiving frame has a circular receiving frame arranged and fixed around the opening of a manhole, and an upper end outer periphery flange supported on an upper receiving step surface in this receiving frame, and is removably fitted into the receiving frame. A manhole cover device consisting of a lid body is known, but in this conventional manhole cover device, the manhole cover device is lifted by placing the hand on retractable hooks etc. provided on both sides that sandwich the center of the lid body. Accordingly, since the lid body is configured to be removable from the receiving frame, it is fine if the lid body is light, but if the lid body is a heavy object with a thick and strong structure that can withstand the weight of the vehicle, , or if the lid is heavy, such as a filling material such as mortar filled in the circular recess and decorative blocks spread over the filling material, the lid must be held manually. There was a problem in that it became difficult to raise the lid and required a great deal of labor to attach and detach the lid.

[Purpose of invention]

This invention was made in order to eliminate the drawbacks of the conventional device, and even if the lid is heavy as mentioned above, the lid can be lifted one side and pulled sideways using a jig. It can be easily removed from the receiving frame by lifting it up and pulling it horizontally, and the removed lid can be easily moved on the road by rolling rollers, and the work of installing the lid into the receiving frame is easy. To provide a manhole cover device configured to be easily installed.

[Summary of the idea]

In order to achieve the above-mentioned purpose, the manhole cover device of this invention has a circular receiving frame arranged and fixed around the opening of the manhole, and an upper end outer peripheral flange supported on the upper receiving step surface in this receiving frame. and a circular lid that is removably fitted into the receiving frame, and an insertion engagement portion for a jig for lifting one side of the lid and pulling it horizontally is provided on the outer periphery of the upper surface of the lid. In particular, a horizontal pulling rolling roller for moving the lid on a road surface is installed at a central position on the lower surface of the lid that is offset from the center of the lid toward the jig insertion engagement portion; The present invention is characterized in that at least two rib-like slide protrusions are provided in the direction in which the lid is pulled up in one direction and extend in the horizontal direction of the lid, which slide into contact with the opening edge of the receiving frame when the lid is pulled up and pulled laterally.

[Example of idea]

An embodiment of this invention will be described below with reference to the drawings. In the drawing, 1 is a circular shape that is buried and fixed around the opening of a manhole (not shown) so that the upper end surface of the peripheral side wall is flush with the paved road surface. In this receiving frame, this receiving frame 1
is made of cast iron and has an inverted T-shaped cross section and an inward flange 3 and an outward flange 4 extending inwardly and outwardly from the lower end of the circumferential wall 2; The portion includes a plurality of elongated rib-shaped protrusions 5, for example eight, which protrude at equal intervals in the circumferential direction, and two adjacent protrusions 5 among these protrusions.
A rib-like protrusion 6 is provided between the protrusions 5 and 5b for use as a fulcrum for raising the lid.
An upper end that is one step lower than the upper end surface of the peripheral side wall 2 of the receiving frame 1 is formed as an upper receiving step surface 7 within the receiving frame 1. The inner end of the inward flange 3 is provided with an upwardly protruding inner rising edge 3a into which an annular rubber gasket 8 is fitted, and the outer periphery of the outward flange 4 is provided with an anchor bolt. A wear notch 4a is formed as shown in FIG.

Reference numeral 10 denotes a circular lid body having an upper end outer peripheral flange 11 supported on the upper receiving step surface 7 in the receiving frame 1, and detachably fitted into the receiving frame 1 with a narrow gap G. In the case of the embodiment of the lid body 10, a filling material 13 such as mortar is filled in a circular recess 12 having an opening on the top surface, and a decorative block 1 of an appropriate shape is placed on top of this filling material.
It is a heavy object having a structure as shown in FIG. It's summery. As shown in FIG. 1, stopper projections 15a and 15b are provided on the outer surface of the peripheral wall of the lid body 10 below the flange 11 to prevent rotation from engaging with the receiving frame projections 5a and 5b. At the outer circumference of the top surface of the lid 10 on the opposite side to 15a and 15b, there is an insertion engagement part 1 of a jig (not shown) for lifting and pulling the lid one side up and horizontally.
Two numbers 6 and 16 are provided spaced apart on the left and right with respect to the horizontal pulling direction of the lid body. This jig insertion engagement portion 16,
Reference numeral 16 indicates recessed protruding protrusions 12a, 12 of the lid body 10.
a small circular cap fitting recess 17 recessed in the upper surface of b as shown in FIG. 4; and the protrusions 12a, 12b.
A cavity 18 provided therein, this cavity and the recess 1
A keyhole 20 provided in a partition wall 19 of 7,
By inserting a horizontal pulling jig (not shown) for lifting one side of the lid, which has an inverted T-shaped locking rod at the lower end of the handle rod, into the keyhole 20 from above and rotating it 90 degrees, A pair of jigs can be engaged. Note that the cap fitting recess 17 normally accommodates the fitted cap 17a as shown by the imaginary line in FIG.
is blocked by.

Reference numeral 21 denotes a horizontal pulling rolling roller for moving the lid on a road surface, which is attached to a central position of the lid bottom wall 10a that is offset from the center of the lid toward the jig insertion engaging portions 16, 16; Bolt 2 to the bottom wall 10a
For the bracket pair 23, 23 fixed at 2,
It is mounted on a shaft 24 as shown in FIG. Incidentally, at the front and rear positions of the roller on the lid bottom wall 10a with respect to the horizontal pulling direction of the lid, there are inclined bulges 10b for protecting the roller.
10c is provided as shown in FIG. 25,2
Reference numeral 6 denotes a pair of sliding protrusions 25 and 26 provided on the lower surface of the bottom wall 10a of the lid 10 on both sides of the roller attachment part and extending in the horizontal pulling direction of the lid. When the lid body 10 is raised to one side with the jig as shown by the solid line in FIG. 6 and then pulled horizontally as shown by the imaginary line in the same figure, it slides into contact with the opening edge of the receiving frame 1 as shown by the imaginary line in FIG. 6. It is formed as a rib-like protrusion. Note that the reference numerals 27a and 27a shown in FIG.
In order to align the receiving frame 1 and the lid body 10 in a fitted state as shown in FIG.
The upper end surface portion (the position corresponding to the protrusion 6 for lifting one side of the lid) and the stopper protrusions 15a, 1 of the lid 10.
5b is a matching mark provided as a triangular planar raised portion on the upper surface of the outer periphery.

1 and 2 show a closed state in which the lid 10 is removably fitted into the receiving frame 1 with a narrow gap G, and in this state, the lid 10 is inserted and engaged with a jig. A jig for horizontally lifting the lid body 10 is inserted and engaged with the parts 16, 16, and the jig is used to raise the lid body 10 to one side as shown by the solid line in FIG.
0 by pulling the jig horizontally, the sliding protrusions 25 and 26 on the lower surface of the lid come into sliding contact with the upper edge of the peripheral side wall 2 of the receiving frame as shown by the imaginary line in Figure 6, and this The guide action of the sliding protrusions 25 and 26 allows the lid 10 to be easily pulled out of the receiving frame 1. FIG. 7 shows a state in which the lid 10 is pulled out of the frame. In this state, the roller 21 on the lower surface of the lid comes into contact with the road surface as shown by the solid line in the figure. It can be easily moved on the road surface in the direction shown by the dotted line in Figure 7. In addition, since the roller 21 is installed at a central position on the lower surface of the lid body, which is offset from the center of the lid body toward the jig insertion engagement portions 16, 16, the roller 21 may come into contact with the road surface at a position near the receiving frame 1. When the horizontal supporting force of the lid body 10 is released in the state shown by the solid line in FIG. 7, the lid body 10 will fit into the receiving frame 1 at an angle as shown by the imaginary line in the figure due to the shift of the center of gravity. , In this state, the lid body 10 is placed in the receiving frame 1.
By pushing it in or retracting it using a jig, the lid 10 can be easily fitted into the state shown in FIGS. 1 and 2.

[Effect of idea]

Since the manhole cover device of this invention is as described above, even if the lid is heavy as described above, it can be easily lifted using a jig for lifting the lid one side and pulling it horizontally. It can be easily removed from the receiving frame by lifting it to one side and pulling it horizontally, and the removed lid can be easily moved on the road by rolling rollers, and the work of installing the lid into the receiving frame is also easy. There is an effect that can be done.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway plan view showing a manhole cover device according to an embodiment of the invention in a closed state; Fig. 2 is a partial plan view showing section A in Fig. 1 without cutting; The figure is a central vertical sectional view taken along the - line in Fig. 1, Figures 4 and 5 are enlarged sectional views taken along the - line and V-V line in Fig. FIG. 7 is an explanatory view of the operation showing the horizontal pulling state, and FIG. 7 is an explanatory view of the operation showing the lid body pulled out of the receiving frame in a state where it is moved on the road surface and fitted into the receiving frame. 1... Receiving frame, 2... Peripheral side wall, 3... Inward flange, 3a... Inner peripheral rising edge, 4... Outward flange, 5, 6... Longitudinal rib-shaped protrusion, 7... Inside receiving frame Upper step surface, 8...Rubber gasket, 10...
... Lid body, 11 ... Upper end outer periphery flange, 12 ... Circular recess, 13 ... Filling material, 14 ... Decorative block, 16 ... Jig insertion engagement portion, 17 ... Cap fitting recess, 18 ... ...Cavity, 19...Partition part, 20
...Keyhole, 21...Rolling roller, 25, 26...
Slide protrusion.

Claims (1)

[Scope of utility model registration request] A circular receiving frame arranged and fixed around the opening of the manhole, and a circular lid that is removably fitted into the receiving frame and has an upper end outer periphery flange supported on an upper receiving step surface within the receiving frame. an insertion engagement portion for a jig for lifting the lid one side up and horizontally on the outer periphery of the upper surface of the lid, and a jig insertion engagement portion from the center of the lid on the lower surface of the lid. Horizontal pulling rolling rollers for moving the lid on the road surface are installed at the center position of the lid, and rollers are installed on both sides of the roller mounting portion on the lower surface of the lid to slide against the opening edge of the receiving frame when the lid is raised and pulled horizontally. At least two extending in the horizontal pulling direction of the contacting lid body
A manhole cover device characterized by being provided with rib-like sliding protrusions.