JPH0510538U - Manhole cover receiving frame - Google Patents

Abstract

(57) [Summary] [Purpose] In a manhole cover receiving frame, an anti-slip pattern is provided on the outer surface of the outer peripheral edge portion of the opening so as to effectively and surely exhibit an anti-slip action in all directions. [Structure] The lid receiving frame 2 has a lid receiving opening 6 into which the manhole lid 1 is fitted. An uneven anti-slip pattern 8 is formed on the outer surface of the upper surface wall 7 on the outer periphery of the lid receiving opening 6. The anti-slip pattern 8 is formed by circular ridges 9 and 10 formed along both the inner and outer peripheral edges of the upper wall 7, and a corrugated ridge 11 formed in a circular shape between the circular ridges 9 and 10. And wavy ridges 1
The projections 14 are formed by casting corresponding to the peaks 12 and the valleys 13.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lid receiving frame for attaching a manhole lid to a manhole opening, and is an improvement in the non-slip pattern of the outer surface of the outer peripheral portion exposed to the ground surface in the installed state.

[0002]

[Prior Art]

 The outer surface of the manhole cover is generally provided with a non-slip pattern that also serves as a decoration. A similar anti-slip pattern may be provided on the outer surface of the outer periphery of the lid receiving frame that receives the manhole lid. FIG. 4 shows a non-slip pattern 20 of a conventional lid receiving frame, which crosses a circular circumferential groove 22 formed by casting at the time of casting on the outer surface of an upper surface wall 21 on the outer periphery of the lid receiving frame. And a large number of ribs 23.

[0003]

[Problems to be solved by the device]

 The width dimension of the upper surface wall 21 itself is about 30 mm. Therefore, when it is attempted to provide the anti-slip pattern 20 on the upper wall 21, the entire pattern must be annular as described above. However, when the footwear slides in the radial direction, the annular anti-slip pattern 20 exerts an anti-slip action by the footwear biting into the circumferential groove 22, but the footwear slides in other directions, especially in the circumferential direction. When they come into contact with each other, they hardly exert the anti-slip action. Further, when the footwear slides in the radial direction, the footwear bites into the upper edge of the orbiting groove 22, but in the sliding contact direction, it only bites into one place inside or outside, so the anti-slip action tends to be uncertain. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to obtain a manhole cover receiving frame having a non-slip pattern that effectively and surely exhibits a non-slip action regardless of the sliding contact direction of footwear.

[0004]

According to the present invention, as shown in FIG. 1, for example, a lid receiving opening 6 for fitting the manhole lid 1 is provided on the upper portion, and the upper surface of the outer periphery of the lid receiving opening 6 is provided. A manhole cover receiving frame having an uneven anti-slip pattern 8 formed on the outer surface of the wall 7, wherein the anti-slip pattern 8 is formed by casting along the inner and outer peripheral edges of the upper wall 7. 10 and both circular ridges 9 and 10. The corrugated ridges 11 formed in a circular shape between the ridges 10 and the ridges corresponding to the peaks 12 and the valleys 13 of the corrugated ridges 11. It is necessary to consist of 14 and.

[0005]

[Action]

 In the radial direction, the footwear bites into the inner or outer circular ridges 9 and 10 and the corrugated ridges 11, and at the locations corresponding to the peaks 12 and valleys 13 of the corrugated ridges 11, The footwear bites into three places including the convex portion 14. With respect to the circumferential direction, two or three points of the convex portion 14 and the portion connecting the peak portion 12 and the valley portion 13 of the corrugated convex strip 11 bite into the footwear.

[0006]

[Effect of the device]

 Therefore, according to the present invention, the footwear bites into the upper wall 7 at two or more locations in every direction in which the footwear slides, so that a reliable anti-slip effect can be obtained.

[0007]

【Example】

 1 to 3 show an embodiment of a lid receiving frame according to the present invention. In FIG. 3, reference numeral 1 is a circular manhole cover made of a cast product, and 2 is a lid receiving frame of the present invention also made of a cast product.

As shown in FIG. 2, in the lid receiving frame 2, a frame body 2 a formed in an annular shape with a U-shaped cross section having an opening on the lower surface is provided with an outer peripheral side wall 4 embedded in a peripheral portion of a manhole opening 3 and a manhole. It is provided with a stepped inner peripheral side wall 5 exposed inside the hole opening 3 and an upper surface wall 7 connecting the upper ends of the inner and outer peripheral side walls 4 and 5. The inner peripheral side wall 5 is formed by tapering the inner wall surface of the upper half portion, and the inside is configured as a lid receiving opening 6 for receiving the manhole lid 1. The manhole cover 1 is connected to the cover receiving frame 2 via a hinge fitting so as to be swingable and openable in the vertical direction, and can be locked in a closed state by a locking device (not shown).

The outer peripheral side wall 4, the inner peripheral side wall 5 and the upper surface wall 7 are reinforced by being connected to each other by ribs 15 provided at appropriate intervals in the circumferential direction. As shown in FIG. 1 to FIG. 3, the outer surface of the upper wall 7 is provided with a non-slip pattern 8 of unevenness which also serves as a decoration.

The anti-slip pattern 8 is formed by being cast along the inner and outer peripheral edges of the upper surface wall 7 and is formed in a circular shape between the circular protrusions 9 and 10. The corrugated ridges 11 and the circular ridges 14 are formed by casting corresponding to the peaks 12 and the valleys 13 of the corrugated ridges 11. Specifically, the outer diameter of the upper wall 7 is 694 mm, the width in the radial direction thereof is 80 mm, the width of both the inner and outer circular ridges 9 and 10 and the wavy ridge 11 are 10 mm, and the convex portion 14 The diameter was 20 mm and the height of each was 5 mm. The pitch of the ridges 12 of the corrugated ridges 11 in the circumferential direction was about 70 mm.

(Other Example) The corrugated ridges 11 are formed in an endless and completely continuous shape in the figure, but may be divided as long as they are substantially continuous. Two convex portions 14 may be provided in correspondence with one crest 12 or valley 13, or one convex 14 may be provided for a plurality of crests 12 or valleys 13. Each convex portion 14 may be formed in a polygonal shape or a star shape. Further, the upper surfaces of both the inner and outer circular ridges 9 and 10, the corrugated ridges 11, and the ridges 14 are cut by a lathe, a shaper, a planar, or the like to form, for example, microgrooves on the upper surfaces to prevent slipping. It does not prevent you from increasing. The lid receiving frame 2 shown in the figure has a mounting form in which the concrete of the manhole port 3 is filled inside the frame body 2a, but the lower shape of the lid receiving frame 2, that is, the mounting form to the manhole port 3 is not particularly limited. A conventionally known one may be adopted.

[Brief description of drawings]

FIG. 1 is a plan view of a main part.

FIG. 2 is an overall plan view.

FIG. 3 is a vertical cross-sectional side view with a manhole cover inserted.

FIG. 4 is a perspective view of a main part of a conventional example.

[Explanation of symbols]

 1 Manhole Lid 2 Lid Receiving Frame 6 Lid Receiving 7 Top Wall 8 Non-Slip Pattern 9 Circular Convex Strip 10 Circular Convex Strip 11 Corrugated Convex Strip 12 Mountain 13 Valley 12 14

Claims (1)

[Claims for utility model registration] [Claim 1] A lid receptacle 6 for fitting the manhole lid 1 is provided on the upper portion, and the outer surface of the top wall 7 on the outer periphery of the lid receptacle 6 has unevenness. A lid receiving frame for a manhole in which a non-slip pattern 8 is formed. 9/10
Corrugated ridges 11 formed in a circular shape by casting between
A lid receiving frame for a manhole, comprising a convex portion 14 formed by casting corresponding to the peak portion 12 and the valley portion 13 of the corrugated convex strip 11.