WO1998023821A1

WO1998023821A1 - Concrete block having cover plate

Info

Publication number: WO1998023821A1
Application number: PCT/JP1997/004339
Authority: WO
Inventors: Toshizo Nishikawa
Original assignee: Toshizo Nishikawa
Priority date: 1996-11-29
Filing date: 1997-11-27
Publication date: 1998-06-04
Also published as: KR19980042921A; CN1089394C; CN1244900A

Abstract

Even if errors of certain extent exist between respective junction surfaces of the main part of a concrete block having a cover plate and the cover plate, the cover plate is placed on the block main part in a self-alignment manner to avoid noise which is caused by the rattling due to the forming errors of the respective junction surfaces of the cover plate and the block main part. The junction surfaces (9) of the block main part (2) are flat planes which are inclined in directions symmetrically with respect to the center line (P) of the concrete block, and the surfaces (14) of the cover plate (3) are the curved surfaces of partial cylinders or have V-shaped cross sections with ridges which have wide angles and protrude toward the junction surfaces (9). The distortion of the cover plate (3) and the errors in the height direction of the junction surfaces (9) of the block main part are automatically absorbed by the shift of the cover plate in a horizontal direction. Further, even if the error of the inclination angle of the flat plane side and the error of the center of curvature or the radius of curvature of the partial cylinder surface side exist, the line contact states between the respective junction surfaces are ensured.

Description

Concrete block with lid plate Technical field

The present invention relates to a concrete block such as a U-shaped groove block and a side groove block, and particularly relates to a structure of a joint portion between a cover plate and a main body block in this type of concrete block having a cover plate. The present invention relates to a structure in which the cover plate is prevented from rattling and generating noise due to a shape error of a joint portion on a main block side. Technology background

The normal side groove block has a notch with an L-shaped cross section on the longitudinal side of the opening provided on the upper surface of the u-shaped groove block. Can be closed.

Although the concrete block is formed using a welded formwork, it is impossible to achieve high dimensional accuracy like a machined metal product due to the nature of the product called the formwork structure / concrete block. Therefore, in the case of a concrete block with a lid plate, the lid plate rattles on the main block due to dimensional errors between the joint surface on the lid side and the joint surface on the body block side. There's a problem.

As a means to prevent this noise, a structure in which a rubber sheet is attached to the joint between the cover plate and the body block, or a structure in which the joint surface between the cover plate and the body block is an inclined surface (Japanese Utility Model Publication Showa 6 (See Japanese Patent Application Publication No. 3-185090) and a structure in which the joint surface between the cover plate and the main body block is formed into a curved surface that is geometrically similar to each other. See the gazette).

It should be noted that the cover plate of this type of concrete block has a structure in which both opposing sides parallel to each other are supported by the main body block side, and there is a shape error in the torsional direction of the cover plate and the joint surface of the main body block. The lid on the body block by the height difference When the plate is placed, one corner of the cover plate floats, and when a load is applied to the floating portion by the passage of an automobile or the like, the cover plate rattles and generates noise.

A structure in which a rubber material is provided on the joint surface between the lid plate and the main body block has been relatively frequently searched for, but has a problem of durability such as wear and deterioration. If the joint surface between the lid plate and the main body block is an inclined surface with the same inclination angle or a curved surface with the same geometrical cross-sectional shape, it is assumed that both joint surfaces are in surface contact. High precision is required for the shape and dimensions of the mold, especially in the case of a structure with a curved joint surface, since the radius of curvature and the positional accuracy of the center of curvature must be controlled when manufacturing the mold. Difficult to manufacture.

The present invention has been made in consideration of the above-described various problems with the conventional structure, and has been described as being in a state where the lid plate is self-aligned even if there is some error between the shapes of the joint surfaces between the lid plate and the main body block. Placing on the main body block absorbs the backlash of the joint surface, so that it is possible to obtain a concrete block with a lid plate that does not generate noise without making the accuracy of the formwork too high. The challenge is to do so. Disclosure of the invention

In the concrete block of the present invention, the joining surfaces 9 and 14 of the cover plate 3 and the main body block 2 are in line contact with each other (actually, line contact having a finite width is caused by deformation or buckling of the concrete surface). Is the basic form.

In the first mode, one of the joint surfaces 9 and 14 between the cover plate 3 and the main body block 2 is a plane inclined in a direction symmetric with respect to the center line P of the concrete block, On the other hand, it is characterized in that 14 is a partially cylindrical curved surface.

In the second mode, one of the joint surfaces 9 and 14 between the cover plate 3 and the main body block 2 is a plane inclined in a direction symmetric with respect to the center line P of the concrete circuit. The other is characterized in that the other 14 is a V-shaped cross section having a shallow ridge protruding toward the one joining surface 9. In the first and second embodiments, one of the joining surfaces 9 is an inclined surface that is inclined in a direction symmetrical with respect to the center line P of the concrete block, so that the torsion of the cover plate 3 and the joining surface 9 of the main body block are performed. The error in the height direction is automatically absorbed by the displacement of the cover plate in the left-right direction, and the line contact state of the joint surfaces on both sides is ensured. In addition, since one of the joint surfaces is a flat surface and the other is a cylindrical surface or a ridge with a shallow angle, errors in the inclination angle on the flat surface and the center of curvature and radius of curvature on the cylindrical surface are the line of both joint surfaces. It does not hinder the contact state.

Therefore, if only the linearity in the longitudinal direction between the joining surfaces of the two blocks is controlled, the cover plate 3 placed on the main body block 2 will be self-aligned by a slight swing in a horizontal plane. Since the line contact state is maintained at both opposing sides, the production of the formwork and the precision control of the product become very easy, and the play of the lid plate can be prevented. The above-mentioned effect is obtained when the cylinder is placed on a plane, no matter what the radius of curvature of the cylinder, the orientation of the cylinder, the rolling of the cylinder, and the Even if it is a cone, it can be clearly understood from the fact that line contact with a plane can always be maintained. When one of the joints has a V-shaped ridge line, the line contact between the ridge line and the plane is maintained even if the vertex angle of the ridge line cross section or the member on the side where the ridge line is inclined are inclined. It is clear considering what is done.

Further, by increasing the radius of curvature of the cylinder and making the ridgeline a shallow ridgeline, it is possible to substantially reduce the surface pressure at the joint, so that there is no problem in strength.

A third embodiment is a concrete block provided with the lid of the first embodiment, wherein the main body block 2 is a groove block, and the main body side joining surface 14 supporting the lid plate 3 of the groove block is partially cylindrical. It is characterized by having a curved surface.

A fourth embodiment is a concrete block provided with a cover plate of the second embodiment, wherein the main body block 2 is a groove block, and the main body side joining surface 14 supporting the cover plate 3 of the groove block has a shallow angle. It has a V-shaped cross section with ridges. In the body blocks of the third and fourth embodiments, the body-side joint surface 14 supporting the cover plate 3 has a partially cylindrical curved surface or a V-shaped cross-section having a shallow ridge line. The shape can be made simple, and the cover plate can be formed with a multi-piece mold.

The lid plate of the present invention includes a protrusion 21 having a smaller protrusion amount 20 than a gap 20 formed between the side surface 11 on the side where the joining surfaces 14 and 9 are provided and the main body block 2 in the longitudinal center thereof. It is characterized by having. In addition, the main body block of the present invention includes a protrusion formed at the center in the longitudinal direction of the inner surface 8 of the opening on the side where the joining surfaces 9 and 14 are provided, and having a protrusion amount smaller than the gap 20 formed between the cover plate 3 and the inner surface 8. It is characterized by having. These projections suppress the movement of the cover plate 3 in the width direction without impeding the self-aligning action due to the swing of the cover plate in the horizontal plane. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is an exploded perspective view of the first embodiment, and FIG. 2 is an enlarged view of a main part of the first embodiment. FIG. 3 is an enlarged view of a main part of the second embodiment. FIG. 4 is an enlarged view of a main part of the third embodiment. FIG. 5 is an enlarged view of a main part of the fourth embodiment. FIG. 6 is an enlarged view of a main part of the fifth embodiment. FIG. 7 is an exploded perspective view of the sixth embodiment, FIG. 8 is an enlarged view of a main part of the sixth embodiment, and FIG. 9 is a plan view of a main part of the sixth embodiment. FIG. 10 is a perspective view of a lid plate having a support surface parallel to the upper surface. FIG. 11 is an enlarged view of a main part of the seventh embodiment. FIG. 12 is an enlarged view of a main part of the eighth embodiment. FIG. 13 is an enlarged view of a main part of the ninth embodiment. FIG. 14 is an enlarged view of a main part of the tenth embodiment. FIG. 15 is an enlarged view of a main part of the eleventh embodiment, and FIG. 16 is a perspective view of a joining surface forming member of the eleventh embodiment. FIG. 17 is an enlarged view of a main part of the 12th embodiment. BEST MODE FOR CARRYING OUT THE INVENTION

FIG. I and FIG. 2 show a first embodiment of the present invention. The concrete block of this embodiment closes the U-groove block 2 having the channel 1 and the channel 1. And a pair of cover plates 3.

The U-shaped groove block 2 forms a water channel 1 by a bottom portion 4 and both side wall portions 5, and a channel side ridge portion of an upper surface 6 of a side wall portion is cut out in an inverted V-shaped cross section. An inner surface 8 having a draft angle and a joining surface 9 extending downward from the lower green to the inside of the inner surface are formed. The inner surface 8 and the joint surface 9 on both sides are symmetric with respect to the center line P of the U-shaped groove block 2.

On the other hand, the lid plate 3 has a width slightly smaller than the interval between the inner surfaces 8 of the side wall portions in plan view, and the length is usually one-half to one-fourth of the groove block. Is a quarter rectangular shape. The plate 3 has a side surface 11 parallel to the inner surface 8 of the side wall portion, and the upper surface 12 and the lower surface 13 of the cover plate are parallel. The portion where the lower surface 13 and the side surface 11 are continuous is a partially cylindrical joining surface 14. The thickness of the lid plate 3 is such that the upper surface 12 of the lid plate and the upper surface 6 of the U-shaped grooved prosthesis are flush with each other when the joint surface 14 contacts the joint surface 9 of the side wall.

FIG. 3 shows a second embodiment of the present invention, and the cross-sectional shape of the joining surface 14 of the cover plate 3 is different from that of the first embodiment. Between the side surface 11 and the lower surface 13 of the lid plate, a joining surface 14 having a V-shaped cross section that faces obliquely outward is formed.

FIG. 4 shows a third embodiment of the present invention. The U-shaped groove block 2 of the present embodiment has a step surface 15 parallel to the upper surface 6, and a ridge 16 having a semicircular cross section is provided at the center. On the other hand, on both sides of the lower surface 13 of the lid plate 3, grooves 17 having an inverted V-shaped cross section are provided. The space between the inverted V-shaped grooves 17 is slightly more hollow than the space between the ridges 16.When the cover plate 3 is placed on the U-shaped groove block 2, the outer inclined surface 9 of the V-shaped groove 1 It touches the outer part of the arc surface 14 of the ridge 16.

FIG. 5 shows a fourth embodiment of the present invention. This embodiment has the same structure as that of the third embodiment except that the space between the inverted V-shaped grooves 17 is provided slightly wider than the space between the ridges 16. When 3 is placed, the inner inclined surface 9 of the inverted V-shaped groove 17 comes into contact with the inner portion of the arc surface 14 of the ridge 16. In such a contact state, the component force of the load applied to the cover plate 3 expands the side wall 5 of the prosok. The stress acting on the side wall 5 can be reduced because the pressure acts in the direction opposite to the direction of the earth pressure around the bronk. This is the same for the first and second embodiments.

FIG. 6 shows a fifth embodiment of the present invention. In this embodiment, the positional relationship between the ridges 16 and the V-grooves 17 of the fourth embodiment is reversed, and the ridges 16 are provided upside down and the V-shaped grooves 17 are formed in the u-shaped grooves. It is provided on the step surface 15 of the block 2. The space between the V-shaped grooves 17 is slightly more hollow than the space between the ridges 16.When the lid plate 3 is placed on the square groove block 2, the arc of the ridge 16 The surface 14 contacts the outer inclined surface 9 of the V-shaped groove 1 mm.

In the structure as in the third to fifth embodiments, when the arc surface 14 of the ridge 16 is in contact with one inclined surface of the V-shaped groove 17, the V-shaped groove 17 A gap 18 is formed between the other inclined surface and the ridge 16, but the dimension of the gap 18 absorbs the torsion of the cover plate 3 and the error in the height direction of the U-shaped groove block 2. If the gap is designed to be sufficient and sufficient to cover the gap, when the cover plate 3 is shifted in the width direction due to an unexpected external force, the shift width can be limited to the range of the gap 18. Can be prevented from shifting more than necessary.

FIG. 7 to FIG. 9 show a sixth embodiment of the present invention. The main body block 2 of the concrete block according to the sixth embodiment is a variable gradient type block, and has a rectangular opening 19 closed at the center of the upper surface thereof with two lid plates 3, 3. Both sides of this opening are cut out in a substantially elliptical cross section. The notch has an inner surface 8 having a draft angle, and a convex portion that is entirely inclined in a direction in which the inner surface becomes lower inward from the lower edge of the inner surface. And a cylindrical joining surface 14. The inner surface 8 and the joint surface 14 on both sides are symmetric with respect to the center line の of the main body block 2.

On the other hand, the lid plate 3 has a rectangular shape whose width is slightly smaller than the interval between the inner surfaces 8 of the side wall portions in plan view and whose length is half the length of the opening 19. The cover plate 3 has a side surface 11 parallel to the inner surface 8 of the opening 19, and the upper surface 12 and the lower surface 13 of the cover plate are parallel. The portion where the lower surface 13 and the side surface 11 are continuous with each other is approximately the general inclination angle of the partially cylindrical main body side joining surface 14. The lid-side joining surface 9 is formed of planes having the same angle. At the center in the longitudinal direction of the cover plate 3 1 1, the inner surface of the opening 8 is half the difference between the gap between each other and the width of the cover plate 3 (when the cover plate 3 is placed exactly at the center of the opening 19, the cover plate (Dimension of a gap 20 formed between the side 11 of the opening and the inner surface 8 of the opening).

The protrusion 21 suppresses the parallel movement of the cover plate 3 in the width direction when the cover plate 3 is placed on the main body trunk 2. In the concrete block of the present invention, when there is an error between the main body side joining surface 1 and the lid side joining surface 9, the backlash of the lid plate 3 as shown in FIG. The center Q in the longitudinal direction is slightly oblique to the centerline R of the main body V in plan view, and is absorbed. On the other hand, the parallel movement of the cover plate 3 in the width direction with respect to the main body block 2 only has a function of slightly inclining the upper surface of the cover plate 3 in the width direction, and does not directly contribute to the prevention of rattling. By providing a projection 21 that suppresses movement in the width direction at the center of the cover plate 3 (the protrusion 21 may be provided on the main body block side in some cases), so that the cover plate 3 moves unnecessarily on the main body block 2. Can be prevented.

There are various types of molds for molding the main body block 2 and the lid plate 3. It is of course possible to form the lid plates one by one, but since it has a simple shape, a structure in which multiple lid plates are formed at once with a single mold using a multi-cavity mold Is widely used. When forming the lid plates 3 one by one, the structure as in the first embodiment in which the lid-side joining surface 14 is a partially cylindrical surface is suitable, and the lid plate 3 is formed with a large number of molds. In such a case, a structure as in the sixth embodiment in which the main body side joining surface 14 is partially cylindrical is suitable. Generally used groove blocks have a structure in which one to four cover plates are provided on one main body block. Can be reduced.

As shown in FIG. 10, even in the lid plate 3 having the conventional structure in which the bonding surface is parallel to the upper surface 12, the movement of the entire lid plate in the width direction is suppressed at the center in the longitudinal direction of the bonding surface. By providing the protrusion 21 for stopping, disturbance of the posture of the cover plate on the main body block can be reduced. It is clear from the above description, especially the means for solving the problem and the description of the operation section, what kind of means the present invention has and what kind of problem has been solved. Some further examples will be described. The seventh embodiment shown in FIG. 11 is similar to the second embodiment shown in FIG. 3, and has a V-shaped cross section in which the cover plate-side joining surface 14 has a ridge line having a shallow angle, and a body-side joining surface. 9 is an example of an inclined plane. In the seventh embodiment, one surface (the surface indicated by 14a in FIG. 3) forming the V-shaped cross section of the lid-side joint surface 14 is flush with the lower surface 13 of the lid plate. It belongs to the same embodiment as the embodiment of FIG.

The eighth embodiment shown in FIG. 12 belongs to the same embodiment as the sixth embodiment shown in FIG. 8, in which a flat surface in which the lid-side joint surface 9 is inclined and a body-side joint surface 14 are formed. In this example, the partial cylindrical surface is provided between a stepped surface 15 formed by cutting out the upper green inside the main body block and an inner wall surface forming the water channel 1.

The ninth embodiment shown in FIG. 13 employs a V-shaped cross section having a shallow ridge line instead of the partial cylindrical surface of the sixth embodiment. The joint surface 14 has a V-shaped cross section with shallow ridges.

The tenth embodiment shown in FIG. 14 is the one in which a V-shaped ridge is provided with a partially cylindrical surface at the ridge of the V-shaped embodiment of FIG. Although the shape is as described above, the lid plate 3 is substantially supported by joining the inclined plane and the cylindrical surface. Therefore, in this embodiment, the angle between the surfaces 14a and 14b forming the V shape on both sides of the cylindrical surface 14c does not need to be a shallow angle.

FIG. 15 and FIG. 16 show a eleventh embodiment of the present invention. As is clear from the configuration and operation of this invention, the joining surface between the cover plate 3 and the main body block 2 need not be formed integrally with the cover plate 3 or the main body block 2. It is sufficient if they are substantially integrated during use, that is, with the lid plate placed on the main unit. In the eleventh embodiment shown in FIGS. 15 and 16, a joining surface forming member 26 in which the inclined surface 25 shown in FIG. The main body block with the configuration shown in Fig. 8 Lock 3 is formed. The joining surface forming member 26 of FIG. 16 forming the main body side joining surface 14 may have a slope 25 having a V-shaped cross section as shown in FIG. Such a joint surface forming member 26 can be formed of aluminum, stainless steel, hard rubber, synthetic resin, or the like. The structure of the eleventh embodiment is such that when the concrete block of the conventional structure is already installed, the joining surface forming member 26 is attached to the installed main body block, and only the cover plate 3 is replaced. It is possible to carry out this invention.

Fig. 17 shows an example in which a lid plate made of gold-grating (called grating) is used as the lid plate 3. In the example of FIG. 17, the joining surface 14 on the side of the main body block 2 is a partially cylindrical joining surface, while the cover plate 3 made of a metal grid has a sloped cross section having a sloped lower surface. The L-shaped leg member 27 is welded to form a lid-side joint surface 9 on the lower surface of the leg member. Even when a metal grid lid plate is used, a configuration different from that shown in FIG. 17, that is, a configuration in which the joining surface 14 on the main block side has a V-shaped cross section having a shallow ridge line, Of course, it is also possible to make the lower surface of the leg member 27 of the lid plate into a cylindrical surface or a V-shaped cross section by setting the joint surface on the side as an inclined plane. Industrial applications

As described above, in the concrete block provided with the cover plate of the present invention, since the shape of the joint between the cover plate side and the main body block side is absorbed by the self-centering action, the occurrence of the back plate play is reduced. Can be prevented. Therefore, it is possible to install a concrete block with a cover plate on the road where automobiles pass.

Claims

Scope of Claim West

1. One of the joint surfaces (9, 14) between the lid plate (3) and the main block (2) is a plane inclined in a direction symmetrical with respect to the center line (P) of the concrete block. A concrete block with a cover plate, characterized in that the other (14) is a partially cylindrical curved surface.

2. A plane where one of the joint surfaces (9, 14) between the cover plate (3) and the main body block (2) is inclined in a direction symmetrical to the center line (P) of the concrete block. A concrete block with a cover plate, characterized in that the other (14) has a V-shaped cross section having a shallow ridge protruding toward the one joining surface (9).

3. At the center in the longitudinal direction of the side surface (11) provided with the joint surfaces (14, 9), a protrusion (21) having a smaller protrusion amount than the gap (20) formed between the side surface (11) and the main body block (2). A concrete block cover plate provided with a cover plate, characterized in that the cover plate is provided with a cover plate.

4. At the longitudinal center of the inner surface (8) of the opening on the side where the joint surfaces (9, 14) are provided, there is a protrusion with a smaller protrusion amount than the gap (20) formed with the lid plate (3). A body block of a concrete block having a cover plate.

5. The body block (2) according to claim 1, wherein the body block (2) is a groove block, and the body-side joint surface (14) supporting the lid plate (3) of the groove block is a partially cylindrical curved surface. Body block of concrete block with lid plate.

6-The main body block (2) is a groove block, and the main body-side joining surface (14) supporting the lid plate (3) of the groove block has a V-shaped cross section with a ridge line having a shallow angle. A body block of a concrete block provided with the lid plate according to item 2.