JP3459574B2 - U-shaped groove block and mold for molding the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete U-shaped groove block used for constructing an open water channel and a mold for molding the same.

[0002]

2. Description of the Related Art A U-shaped groove block has two side walls 2 facing each other.
Is a block having a U-shaped cross section formed integrally with the bottom wall 3 that connects the lower sides to each other.
A stepped surface 9 is formed to support the lid plate 14 that closes the upper surface of the water channel. Conventionally, the stepped surface 9 for hanging the lid is formed by cutting out the inside of the upper side portion of the side wall which is vertically or slightly inclined in the direction in which the upper side is widened to have an L-shaped cross section. The outer flange 55 is formed on the upper edge of the outer surface of the side wall in order to prevent a decrease and to secure sufficient strength in the peripheral portion of the step surface 9 on which the weight of the vehicle traveling on the cover plate directly acts. (See Figure 9).

Conventionally, the stepped surface 9 of the lid is a horizontal stepped surface. Therefore, the load transmitted to the U-shaped groove block through the lid plate acts vertically on the upper part of the side wall, and the side wall. The direction of the surface and the action direction of the load were almost the same.

[0004]

Since the U-shaped groove and the concrete block serving as the lid plate are formed by a mold having a welded structure, it is impossible to obtain high dimensional accuracy like a machined product. If there is a shape error in the step surface 9 for hanging the lid of the U-shaped groove block or the lower surface of the lid plate that abuts on this step surface, there is a backlash in the support of the lid plate, and when the vehicle runs or a person walks. The lid plate rattles on and makes a noise. In order to prevent this noise generation, conventionally, a structure in which a rubber packing or the like is interposed between the cover plate and the cover hanging step surface 9 has been used. However, since the rubber packing has a problem in durability, Various structures have been proposed in which both sides of the hanging step surface and the lower surface of the cover plate are made into a flat surface or an inwardly-cylindrical cylindrical surface which is inclined downward toward the center of the water channel.

Further, one of the inventors of the present application sets the lid-hanging step surface and the lid plate by forming the lid-hanging step surface 9 into a medium-convex cylindrical surface or a medium-convex V-shaped cross section having a ridgeline with a shallow angle. The shape error of both sides of the lower surface of the concrete is absorbed by the minute rotation of the lid plate around the vertical axis on the U-shaped groove block, and the concrete can be installed without rattling the lid plate and thus producing no noise. Proposing blocks (Japanese Patent Application 1
0-248288).

According to the present invention , noise due to rattling of the cover plate is prevented, and the load when a vehicle or the like travels on the cover plate is smoothly transmitted to the side wall of the U-shaped groove block. An object of the present invention is to provide an improved U-shaped groove block capable of constructing a water channel and having a large flow channel area, and a mold capable of efficiently molding such a block.

[0007]

In order to solve the above-mentioned problems, the U-shaped groove block of the present invention has two side walls 2 and 2 facing each other, a bottom wall 3 integrally connecting the bottom sides thereof, and a side wall. 2 is provided with a step surface 9 that serves as a cover on the inner side of the upper side,
In the concrete U-shaped groove block, the outer surface 7 from the upper side to the lower side of the side walls 2 and 2 is formed into a single vertical plane without any unevenness, and the step surface 9 serving as a lid inclines downward toward the inside. It is formed into a convex cylindrical surface or a medium convex V-shaped cross section having a ridge line at a shallow angle, and the inner surface of the side wall below this step surface 9 has a downward spread that intersects the step surface at a right angle or at a larger angle. A flow path expanding slope 13 is formed, and a lid plate whose both side surfaces on the lower surface are inclined flat surfaces having an angle substantially the same as the inclination angle of the step surface slides downward on the step surface 9 and rotates about the vertical axis. Therefore, the means for absorbing the shape error between the step and the cover plate is adopted.

In the U-shaped groove block of the present invention, the outer surface 7 which is perpendicular to the lower side of the lid-hanging step surface 9, the inner wall surface 13 inclined in the flow channel expanding direction, and the lid-hanging step surface 9 make the upper side. Forms a wedge-shaped inverted triangular cross section having a centerline P that is inclined slightly inward. Since the lid-hanging step surface 9 is inclined in the direction in which the inside is lowered, the load from the lid plate acts on the inner wall downward and outward. Due to the friction between the step surface 9 and the cover plate 14, the angle at which the load action line A is outward is not as large as the inclination angle of the step surface. Therefore, the line of action A of the load from the lid plate acts in the direction of the approximate axis of the cross section of the inverted triangle, and the load from the lid plate does not cause a large local bending stress on the side wall 2, and U
It is smoothly transmitted to the character groove block 1. Further, since the step surface 9 is formed in a state of protruding to the inside of the side wall 2, there is no problem in strength even if the outer flange is not formed on the upper side portion of the side wall, and the outer surface of the side wall can be formed all over.

Since the outer surface 7 of the side wall can be formed on one vertical surface (by adopting the formwork structure of this application, no draft is required), a sheet pile is erected on the ground surface to construct a waterway, By excavating the ground surface on one side with a width equivalent to the width of the block, and arranging the U-shaped groove block with the outer surface of the side wall attached to the sheet pile, the slope with respect to the vertical line and the meandering direction of the water channel meander. It is possible to arrange the U-shaped groove block by a simple operation without causing any trouble.
Further, since there is no outer flange, backfilling of soil and densification work after arranging the blocks can be performed easily and surely.

Further, when a water channel is constructed with blocks of the same width, the lower part of the water channel, which has no outer flange and through which the most water flows, is widened by the presence of the inclined inner wall surface 13, so that the necessary water flow amount can be secured. Can be constructed with low-height blocks, thus reducing the amount of concrete used in the blocks to construct channels with the same water flow and the amount of excavation of earth and sand when burying blocks. Construction costs are reduced.

[0011] U-shaped groove blocks of the present invention is the structure of the lid takes recessed surfaces 9 and Chutotsu cylindrical surface or shallow (loose) Chutotsu V-shaped cross-section having a ridge angle. When this structure is adopted, both sides of the lower surface of the lid plate supported by the step surface 9 are inclined flat surfaces inclined at substantially the same angle as the inclination angle of the step surface 9.
This structure is the structure proposed in the above-mentioned Japanese Patent Application No. 10-268288, and the cover plate slides down on the step surface 9 due to the shape error of the U-shaped groove block and the cover plate, and slightly rotates around the vertical axis. This is a structure that absorbs the noise and prevents the lid plate from rattling and hence the noise. In the case of this structure, the inclination of the step surface 9 is balanced by the balance between the function of absorbing a small error due to the lid plate slightly rotating due to its own weight and the demand for minimizing the outward force applied to the side wall of the U-shaped groove block. The angle (inclination angle of the entire step surface) is 30 to 4
It is preferably about 0 degrees. The tilt angle here is an angle formed by the step surface and the horizontal plane.

When the inclination angle of the step surface is about 30 to 40 degrees, the line of action of the load applied to the U-shaped groove through the step surface is in the direction close to the central axis of the wedge-shaped inverted triangle, which is good. In addition to the anti-tapping effect, a better internal stress state on the U-shaped groove block side is realized. Further, in the U-shaped groove, unlike a so-called variable-gradient side groove, the lid-hanging step surface 9
Since the blocks extend in the longitudinal direction of the block, the lid plate is placed on the step surface 9 and the lid plate is placed while being slightly displaced in the block longitudinal direction. Therefore, when the lid plate is slightly displaced in the axial direction, A downward sliding movement of the lid occurs, and the lid plate can be attached very naturally and automatically without rattling.

The molding mold of the present invention is a mold for molding the U-shaped groove block having the above-mentioned structure, and the base 15
And a joint surface 37 formed inwardly on both sides of the upper surface of the base, and a side plate 3 on the outside of the joint surface, the molding surface being openably and closably mounted on the base 15 being a flat and flat surface.
9, at least one edge plate 51 which is opened and closed by rotating 90 degrees or more, and a flexibility which is fixedly attached to the upper end of a support frame 18 which is vertically fixed to the upper face of the base 15. Inner frame 23 made of steel plate, and flow path expanding surface forming of inner wall of block formed by squeezing inward lower parts of both side surfaces of the inner frame
The portion 31 and then the inner concave cylinder formed by bulging the lower portions of both side surfaces of the inner frame to the outside to incline at an angle of 30 to 40 degrees in the direction in which the outer side is lowered or the middle concave having a bend line of a shallow angle. A V-shaped lid-hanging step forming part 32,
The lower portions of both side surfaces of the inner frame are further extended downward and are approximately 90
The lid-engaging side surface molding portion 33 and the upper surface molding portion 34 of the block formed by bending outwardly, and the joining surface 3 at the time of mold assembly.
7, an inner frame lower end support portion 35 provided immediately below the upper surface molding portion 34 of the block so as to support the lower portions of both side surfaces of the inner frame 23, an inner frame bracket 44 fixed to both inner side surfaces of the inner frame, Side plate bracket 4 fixed to the lower end of the side plate 39
It is provided with a means for connecting with 3 and an operation connecting link 45 for narrowing the side surface of the inner frame 23 inward when the side plate 39 is rotated.

As a result, not only a mold for molding the U-shaped groove block of the present invention can be obtained, but also the inner frame 23 is squeezed by opening the side plate at the time of demolding.
The block can be removed from the mold by pulling it out in the small direction of the form. Further, since the opening and closing of the side plate and the drawing operation of the inner frame are interlocked with each other, the work of assembling and opening the mold becomes easy. In the frame of this structure, at least one of the edge plates must be rotated 90 degrees or more so as not to prevent the block from moving in the edge direction at the time of demolding.

It is also possible to form a flat surface having a narrow width (about 2 to 10 mm) parallel to the inclined surfaces on both sides of the lower surface of the cover plate on the cylindrical surface of the stepped surface 9 for hanging the cover of the block or the ridge portion of the V-shaped cross section. Yes, in this case, step molding of the mold for molding
A similar narrow flat portion will be formed at the corresponding position of the portion 32 . When the step forming portion 32 of the form is formed by bending a steel plate, its cylindrical surface or V-shaped cross section is manufactured by so-called inching processing in which the material is gradually fed by a bender used to bend the metal plate material. Therefore, by controlling the material feed amount at that time, it is possible to form a flat surface portion having a narrow width at the ridge portion of the concave V-shaped cross section having the concave concave cylindrical surface or the bending line of a shallow angle. The term “concave cylindrical surface” or “concave V-shaped cross section” as used in the present application should be construed to include a concave cylindrical surface or a concave V-shaped section partially including such a narrow plane.

[0016]

1 to 3 are views showing a first embodiment of a U-shaped groove block of the present invention. FIG. 1 is a sectional view showing a packing groove and the like omitted, and FIG. 2 is a lid. FIG. 3 is a cross-sectional view of the lid-engaging portion shown together with a part of the plate, and FIG. 3 is a perspective view. The block 1 includes two side walls 2 and 2 and a bottom wall 3 which are integrally formed. The corners between the lower inner surface of the side wall and the upper surface of the bottom wall are connected by an arc, and the lower outer surface of the side wall and the bottom surface of the bottom wall. 45 degree chamfers 5 and 6 are provided at the corners of and and the corners of the outer surface of the side wall and the upper surface 4 of the side wall, respectively. The outer surface 7 of the side wall is a flat surface that is orthogonal to the bottom surface 8 of the bottom wall and has no unevenness.

The lid-hanging stepped surface 9 formed on the inner side of the upper edge of the side wall 2 is inclined in the direction of descending toward the center of the water channel, and in this embodiment, it is a medium convex cylindrical surface. . At the lower end of the lid-hanging step surface 9, a horizontal surface 1 having a short width is provided.
1 is formed, then a vertical surface 12 extending downward is formed, and an inclined inner wall surface 13 is formed below the vertical surface 12 and is inclined in a direction in which the water channel width is widened, and is connected to the inner wall surface of the lower portion of the side wall. The outer surface of the side wall, the stepped surface 9 for hanging the lid, and the inclined inner wall surface 13 form a wedge-shaped inverted triangle whose schematic shape is shown by an imaginary line in FIG. 2, and the load from the lid 14 is the inside of the upper surface of this inverted triangle. It will act slightly outward and downward on the part of the. The direction of the line of action of this load differs depending on the friction between the step surface 9 and the cover plate 14 and is not constant, but the general direction is indicated by the arrow A in FIG.

FIG. 4 is a plan view of the embodiment shown in FIGS. 1 to 3 in which the lid-hanging step surface 9 has a medium convex V having a ridgeline with a shallow angle.
It is the figure which showed the lid engagement part of 2nd Example which was made into the shape cross section. The block of the second embodiment is the same as the structure of the first embodiment except that the step surface 9 is changed to a cylindrical surface to have a V-shaped cross section.

FIGS. 5 to 8 are views showing an embodiment of the block forming mold of the present invention. The base 15 of the mold is provided with a leg frame 16 formed of a shape steel, and an underframe 17 formed of a flat rectangular tube shape by facing two U-shaped steels. A support frame 18 is erected at the center of the underframe 17, and the support frame 1
A support shaft 19 in the longitudinal direction of the block is provided at the upper end of 8. A bracket 21 extending in the lateral direction is fixed to both sides of the underframe 17, and a pivot shaft 22 in the block longitudinal direction is provided at the tip of the bracket.

The inner frame 23 has a bent structure of a steel plate and has an upper surface portion 24.
And both side portions 25, and the upper surface portion 24 and the side portion 25.
At the inner side of the
7 are fixed respectively. The portions 28 on both sides of the upper surface of the inner frame 23 are provided with portions 28 to which no reinforcing plate is attached, and these portions serve as bent portions when the inner frame is squeezed. Reference numerals 29 and 30 are reinforcing plates provided in the end faces of the reinforcing plates 26 and 27 in the block longitudinal direction. The inner frame 23 is swingably supported by the support shaft 19 at substantially the center of the reinforcing plates 29 and 30 on the back side of the upper surface portion.

The steel plate forming the inner frame 23 is bent 90 degrees downward in an arc on both sides of the upper surface of the steel plate, and is bent obliquely inward at the lower part thereof to form the inclined inner surface forming portion 31. Once a vertical surface is formed below, it is bent horizontally outward with a short width, then it is bent obliquely toward the outside to form a step surface forming portion 32, and then it is bent downward to form a side surface for lid hanging. The part 33 is formed. Finally, the upper surface molding portion 34 of the block is formed by bending outward by 90 degrees.
The stepped surface forming portion 32 is a cylindrical surface having a forming surface (upward outward surface) concavely formed by the inching processing described above.

A support block 35 is fixed below the upper surface molding portion 34 of the block of the inner frame, and this support block has a downward joining surface 36 which is inclined slightly outward. On the other hand, on both sides of the upper surface of the underframe 17 of the base, there are provided support pedestals 38 having upwardly facing joint surfaces 37, and the side faces of the inner frame 23 are expanded outward. In this state, the downward joint surface 36 of the support block and the upward joint surface 37 of the support stand are in close contact with each other to hold the inner frame 23 at the prescribed position.

The side plate 39 is supported at its lower side by the pivot shaft 22 so as to be swingable and openable, and its molding surface 41 is formed into a flat surface without irregularities, and has a triangular cross section for molding the chamfered portions 5 on both sides of the bottom of the block at its upper end. The ridge 42 is provided. A side plate side bracket 43 extending downward is fixed to the outer side of the lower side of the side plate 39, and the reinforcing plate 2 provided on the side surface portion of the inner frame described above.
7 extends downward to form an inner frame side bracket 44, and both brackets 43, 44 are pivotally connected to each other by a link 45. The link 45 is provided with a cross head 52 at an outer portion connected to the side plate side bracket 43, and is pivotally connected to the side plate side bracket 43 by pins projecting to both sides of the cross head. Cross head 52
Is inserted in a threaded rod 53 extending in the longitudinal direction of the link, and the two heads of the crosshead are clamped and fastened by sandwiching both sides of the crosshead with two nuts screwed into the threaded rod. Is adjustable and fixed. When the side plate 39 is opened by this structure,
The link 45 pushes the inner frame side bracket 44 toward the inner side, bends the inner frame 23 at the bending portion 28 and squeezes the side plate 3
When the 9 is erected, the link 45 is attached to the inner frame side bracket 44.
To the outside to expand the inner frame 23 to form a mold. In the structure of this embodiment, when the side plate is opened, the inner frame 23 is squeezed by the weight of the side plate, and when the side plate 39 is erected, the force of spreading to the outside of the inner frame 23 is set in the standing direction of the side plate 39. Since the movement of the side plate 39 is assisted, the side plate 39 can be opened and closed and the inner frame 23 can be throttled with a smaller force.

On the outside of the side plate 39, a fixed leg plate 46 that supports the side plate when the side plate is open and a swing leg plate 47 that supports the side plate in an upright state when the side plate is erected are attached.
The fixed leg plate 45 is fixed to the side plate with bolts 48, and when the side plate 39 is opened, the lower end thereof comes into contact with the leg frame 16 to support the side plate. On the other hand, the swing leg plate 47 is swingably provided at the base portion of the fixed leg plate 46 with a pin 49, and when the side plate 39 is erected, it swings around the pin 49 by its own weight and hangs vertically. When the hand is released from the side plate in that state, and when the side plate 39 falls slightly outward, the lower end 50 thereof comes into contact with the upper surface of the leg frame 16 to support the side plate. When the side plate 39 is opened, the side plate is erected, the swing leg plate 47 is pulled out to the outside, and then the side plate is tilted.

As shown in FIG. 6, the small edge plate 51 has an underframe 17
Is provided at the edge of the fork so as to open and close by swinging 90 degrees around a horizontal axis.

[Brief description of drawings]

FIG. 1 is a sectional view of a U-shaped groove block.

FIG. 2 is a cross-sectional view of essential parts showing a part of a lid plate and a lid hooking portion.

FIG. 3 is a perspective view of a U-shaped groove

FIG. 4 is a sectional view of an essential part showing another example of the lid hooking part.

FIG. 5 is a side view of a U-shaped groove block forming frame.

FIG. 6 is a front view of the mold with the fore edge plate open.

7 is a cross-sectional view showing the left half of part A in FIG. 6 (the right half and the left half are symmetrical)

8 is a cross-sectional view showing the left half of part B of FIG. 6 (the right half and the left half are symmetrical)

FIG. 9 is a perspective view of a conventional U-shaped groove block.

[Explanation of symbols]

1 block 2 side wall 3 bottom wall 7 outer surface 9 step surface 12 vertical surface 13 inclined inner wall surface 15 base 18 support frame 23 inner frame 31 inclined inner surface molding portion 32 step surface molding portion 33 side surface molding portion 34 upper surface molding portion 35 support block 37 Upward joining surface 39 Side plate 43 Side plate side bracket 44 Inner frame side bracket 45 Link

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masateru Nakano 6-132 Matsumura, Kanazawa, Ishikawa Prefecture Ohchi Co., Ltd. (72) Inventor, Saburo Tsuji 4-3-6, Masuda, Natori, Miyagi (56) References Actual Kaihei 6-59017 (JP, U) JP-B-62-5773 (JP, B2) Registered utility model 3047851 (JP, U) Registered utility model 3026678 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) E03F 5/04 B28B 7/10

Claims (2)

(57) [Claims] 1. A pair of opposing side walls (2, 2), a bottom wall (3) integrally connecting the bottom sides of the side walls (3), and a step surface (9) serving as a lid on the inner side of the upper side of the side wall (2). ) And a concrete U-shaped groove block, the outer surface (7) from the upper side to the lower side of the side wall (2, 2) is formed into a flat vertical surface without unevenness, which serves as a lid step ( 9) is formed in a medium-convex cylindrical surface sloping downward toward the inner side or a medium-convex V-shaped cross section with a shallow angle ridge, and the step is formed on the inner surface of the side wall below the step surface (9). A downwardly expanding flow channel expanding slope (13) intersecting the surface at a right angle or at an angle larger than this is formed, and a lid plate in which both sides of the lower surface are inclined flat surfaces at approximately the same angle as the inclination angle of the stepped surface is formed. A U-shaped groove block characterized by absorbing a shape error between the step surface and the cover plate by sliding downward on the step surface (9) and rotating around the vertical axis. . 2. A base (15), joint surfaces (37) formed inwardly on both sides of the upper surface of the base, and an openable and closable mount on the base (15) outside the joint surface. A side plate (39) whose formed molding surface is a flat surface without unevenness, at least one small edge plate (51) that is rotated by 90 degrees or more and opened and closed, and vertically fixed to the center of the upper surface of the base (15). The inner frame (23) made of a flexible steel plate fixed to the upper end of the supporting frame (18) with the center of the upper surface fixed, and the flow of the inner wall of the block formed by squeezing the lower parts of both side surfaces of the inner frame inward. The road widening surface forming part (31) and a medium concave cylinder or shallow angle inclined at an angle of 30 to 40 degrees in the downward direction of the outside formed by protruding the lower portions of both side surfaces of the inner frame to the outside. the lid takes stepped surface forming part of the Chu凹V-shaped having a bend line (32), was further extended downwardly below the sides of the inner frame and to substantially 90 Dosotogawa The lid takes side molding part of the block formed by tracks (33) and a top forming portion (34),
An inner frame lower end support portion (35) provided immediately below the upper surface molding portion (34) of the block so as to contact the joint surface (37) during mold assembly to support the lower portions of both side surfaces of the inner frame (23), The inner frame bracket (44) fixed to the inner side surfaces of the inner frame and the side plate bracket (43) fixed to the lower ends of the side plates (39) are connected to each other to rotate the side plate (39) so that the side surface of the inner frame (23) The mold for molding a U-shaped groove block according to claim 1, further comprising an operating connection link (45) for squeezing the inside.