JP2011080345A - Precast concrete side ditch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a concrete side ditch and a lid having a structure which can reduce and control the production of noise caused by the rattle of the lid. <P>SOLUTION: The bottom of the lid is placed on the upper opening lid engagement part of the side ditch body of the concrete side ditch. A lid engagement step surface of the side ditch body is formed on the projected dot aggregate surface, and the contact surface of the bottom of the lid which corresponds with the lid engagement part is also formed on the projected dot aggregate surface like the lid engagement step surface of the side ditch body. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a structure of a main body of a precast concrete side groove that is buried in a side portion of a roadway or the like, collects rainwater on the road surface, and guides it to the end of the road, and a lid thereof.

Precast concrete gutters are formed by connecting blocks with a length of 1 m, 2 m, etc., and each block has an open top for collecting rainwater on the road and for maintenance and maintenance inside the gutters. A lid of 0.5 m, 1 m, etc. is put on.
In the conventional side groove, the bottom surface of the lid is generally flat, and the lid hooking stepped surface of the side groove main body, which is a contact surface between the lid and the main body, is also horizontal.
In recent years, in order to increase the degree of adhesion of the contact surface and reduce rattling noise, the cross-sectional shape of the contact portion between the lid and the main body is inclined or bent, and by combining them, surface contact and line contact are diversified. It is progressing.

  Japanese Patent No. 3184486   Utility Model Registration No. 3031035   Utility Model Registration No. 3037878   Utility Model Registration No. 3079870

Since the conventional lid bottom is flat and the step of the lid of the side groove body that receives the lid is also flat, the lid and the side groove body are apt to rattle and generate noise.
Especially when the vehicle passed over the top of the lid, it was a big source of noise pollution.

In order to solve such a problem, rubber packing or the like is interposed on the contact surface between the lid and the side groove main body. However, this has led to cost increase due to material costs and construction work.
In addition, it is also used to prevent rattling by increasing the degree of adhesion by “surface contact”, “line contact”, etc., with the cross-sectional shape of the lid cover step surface of the main body being inclined or curved and the lid bottom also corresponding shape. However, it is pointed out that there is a difficulty in compatibility with other products.
An object of the present invention is to obtain a concrete side groove main body and a lid having a structure capable of reducing and suppressing the generation of noise in the conventional standard product as described above without using packing.

  In order to solve the above problems, the concrete side groove structure according to the present invention includes a side groove body having a lid hanging stepped surface on which a lid opening and a bottom portion of the lid are placed, and a lid of the lid hanging step surface. The contact surface is formed on the collective surface and the contact surface corresponding to the lid hook at the bottom of the lid is also formed on the projecting dot collective surface, and the contact surface is a minute gap due to competition between the upper and lower projecting dot groups and point contact. Is born with a plus or minus width and is fixed as it is.

  By making the lid hanging step surface and the lid bottom contact surface into a protruding dot assembly surface, the contact surface between the main body and the lid adheres with a minute gap compared to the conventional product, so the vehicle passes through the top of the lid. This reduces the noise that was generated.

  Even if the side groove main body and the lid are twisted to cause a differential distortion in the contact interval, the contact surface is less likely to collide due to absorption by a minute gap, and noise is suppressed.

Each formation of the lid hanging step surface and the lid bottom contact surface of the side groove main body does not cause an increase in cost because of a conventional manufacturing process.
And since it does not depend on a special shape, it is compatible with general distribution products, and the lid can be attached and detached at the same time.

  The same effect as described above can be obtained even when the crossing shape of the contact surface between the lid and the side groove main body is inclined or curved, or a combination thereof.

  It is a perspective view which shows the example of an embodiment by the plane support of a drop lid side groove | channel main body and a lid | cover.   It is a perspective view which shows the example of an embodiment by the curved surface support of a drop lid side groove | channel main body and a cover.   It is a perspective view which shows the example of an embodiment by the inclination support of a portal side gutter main body and a lid | cover.   FIG. 2 is a cross-sectional view taken along line aa in FIG. 1.   FIG. 3 is a cross-sectional view taken along line bb in FIG. 2.   FIG. 4 is a cross-sectional view taken along line cc in FIG. 3.   It is an expanded longitudinal cross-sectional view which shows the adhesion state in the projection-shaped dot collection surface of a side groove | channel main body and a lid | cover.   It is an expanded longitudinal cross-sectional view which shows another adhesion state in the protruding groove | channel gathering surface of a side groove | channel main body and a lid | cover.   It is an expansion longitudinal cross-section which shows another adhesion state in the side groove | channel main body and the protrusion-shaped dot collection surface of a lid | cover.

The lid hanging step surface of the side groove body is formed on the protruding dot collecting surface, and the lid bottom contact surface is also formed on the same protruding dot collecting surface.
As a result, the contact surface between the side groove main body and the lid adheres while maintaining a minute gap with a plus / minus width due to interference between the upper and lower protruding dot groups and unevenness and strength of point contact.

  In this way, the contact surface between the side groove main body and the lid increases the density of point contact due to the protruding collective dots from both the upper and lower sides, and it also combines with the engagement meshing due to interference between the upper and lower dots, so that the adhesion surface is minute without sticking Since it adheres while maintaining a gap, the noise generated when the vehicle passes through the upper part of the lid is considerably reduced.

  In the past, rattling noise was generated due to twisting of the upper groove body and lid, but even if distortion of the attachment surface occurs due to twisting, the engagement meshing due to the degree of contact between the upper and lower dots and interference between the upper and lower dot groups Depending on the strength and variation, the absorption adaption is adapted to maintain a minute gap between the side groove main body and the cover surface of the lid, and sound is hardly generated.

1 and 2 show an embodiment.
FIG. 1 shows a fitting structure by flat support between the lid-lid side groove body and the lid, FIG. 2 shows sticking by curved-surface bearing between the lid-side groove body and the lid, and FIG. It is an Example which shows the attachment structure state.
(1) is a gutter body (2) is a lid.

In the embodiment shown in FIG. 1, the lid-type side groove main body (1) has a side groove inner surface as it is as an opening (3), and both lid hanging portions project on a flat step surface (4) for housing and placing the lid (2). Dots (6) are gathered.
The lid (2) is shaped and accommodated corresponding to the side groove main body, and in this embodiment, a slit (10) in the longitudinal direction serving as a rainwater inlet is provided at the center by a fixed beam (11). Protruding dots (6) are formed in an aggregate on the flat lid bottom contact surface (5) corresponding to the surface (4).
When the lid (2) is housed and placed on the side groove main body (1), the contact surface is held in close contact with the minute gap (7) due to the interposition of the protruding dots (6) as shown in FIG.

In the embodiment of FIG. 2, the lid-type side groove body (1) has a protruding shape on the step surface (4) on the lower side of the curved surface on which both lid hanging portions are in the opening (3) and the lid (2) is stored and placed. Dots (6) are gathered.
The lid (2) is shaped to be accommodated in the side groove, and in this embodiment, a slit (10) in the longitudinal direction serving as a rainwater inlet is provided by a fixed beam (11) in the center, and the step surface ( Protruding dots (6) are collectively formed on the curved lid bottom contact surface (5) corresponding to 4).
When the lid (2) is housed and placed on the side structure body (1), the contact surface is held in close contact with the minute gap (7) by the interposition of the protruding dots (6) as shown in FIG.

In the embodiment of FIG. 3, the free-gradient gate-type side groove body (1) has a longitudinally continuous slit (10) serving as a rainwater inlet at the center of the upper surface slab provided by a fixed beam (11). In addition, in both lid portions of the upper central opening (3), the protruding step (6) is formed on the inclined step surface (4) for accommodating and placing the lid (2).
The lid (2) is shaped to be accommodated in the side groove, and in this embodiment, a slit (10) in the longitudinal direction serving as a rainwater inlet is provided by a fixed beam (11) in the center, and the step surface ( Protruding dots (6) are collectively formed on the inclined lid bottom contact surface (5) corresponding to 4).
When the lid (2) is stored and placed in the gutter body (1), the longitudinal slit (10) serving as the rainwater inlet is connected, and as shown in FIG. 6, the contact surface is formed by the interposition of the protruding dots (6). The minute gap (7) is held and does not adhere.

7 and 8 show the state of the contact surface.
FIG. 7 shows the case where the micro-gap (7) is almost maximum, FIG. 8 is about the minimum, and FIG. 9 is the middle case.
Protruding dots are gathered on a flat or curved surface in an equally spaced polka dot pattern (not shown), etc. The shape is collapsed after the installation is completed along with the ease of forming a truncated cone, spherical trapezoidal shape, etc. On the condition of bitterness, the diameter of the bottom is 3-5 mm, the height is 1-3 mm, and the center interval is 10-30 mm.
The minute gap (7) on the contact surface depends on the degree of engagement between the upper and lower protruding dot assembly surfaces due to point contact and the upper and lower dot interference with respect to the design load such as vehicle running, and the side groove main body (1) and lid (2 ), Such as twisting of the storage portion, the state of the crack, the direction of the load, the wear of the protruding dots, and the like.
In the case of a small structure having a side groove inner width of 300 mm, the step surface width is about 50 mm, and in the case of dots 3 to 4 rows, it adheres with a gap of 1.5 to 3 mm.
In addition, the diameter, height, shape, and arrangement pattern of the collective surface of the protruding dots do not have to coincide with each other, and an equivalent noise suppression effect can be obtained.

The side groove according to the present invention is compatible with general distribution products, and depending on the design conditions such as the combined use of these, the formation of the protruding dot aggregation surface is only one of the side groove body lid hanging step surface or the corresponding lid bottom contact surface. It can also be.
In this case, the contact surface between the side groove body and the lid is only one of the upper and lower protruding dot collecting surfaces, and the interference effect between the upper and lower dot groups does not occur and the dot density is reduced. Since the point contact at the gathering surface is maintained, it is possible to adhere with keeping a minute gap and obtain a noise suppressing effect.

DESCRIPTION OF SYMBOLS 1 Side groove body 2 Lid 3 Opening 4 Step surface 5 Lid bottom contact surface 6 Protruding dot 7 Minute gap 10 Slit 11 Fixed beam 12 Upper surface 13 Lower surface

Claims (2)

  In a concrete side groove on which the bottom of the lid is placed on the top opening lid of the side groove main body, the side groove main body lid hanging step surface is formed on a protruding dot collecting surface, and the contact surface corresponding to the lid hook of the lid bottom is also formed on the side groove main body. It is formed on the protruding dot gathering surface like the lid hanging step surface, and it adheres while keeping a minute gap by interference and point contact between the upper and lower dot groups without the contact surface of the side groove body and the lid contacting closely. And precast concrete gutters.   In the concrete side groove on which the bottom of the lid is placed on the top opening lid of the side groove main body, only the side groove main body lid stepping surface or only the contact surface corresponding to the lid bottom of the lid bottom portion is a protruding dot assembly surface. A precast concrete side groove, characterized in that the side groove main body and the contact surface of the lid do not adhere to each other and are adhered while maintaining a minute gap by point contact.

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