JPH0449267Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a concrete U-shaped groove, in particular, in which both side walls are inclined in an expanding shape from the base end to the tip, and the side walls are inclined in the longitudinal direction of the side walls. This invention relates to a concrete U-shaped groove with a lifting and reversing hole in which the upper end edge and the lower end edge are formed as bulging edges projecting outward.

[Prior Art] Conventionally, concrete U-shaped grooves are generally known in which a lifting reversal hole for lifting using a lifting reversal tool is formed approximately at the center of both side walls of the U-shaped groove.

By the way, there are various sizes and shapes of concrete U-shaped grooves, and in particular, as shown in the drawing, both side walls are inclined in a widening shape from the base end to the tip. In the case of a concrete U-shaped groove, etc., in which the upper and lower longitudinal edges of the side walls are formed as bulging edges projecting outward,
Various problems arose when the insertion rods of the lifting and reversing tools were inserted into the thin-walled portions of the substantially central portions of the side walls to lift and reverse the apparatus.

That is, since the above-mentioned lifting reversal hole must be bored approximately at the center of gravity of the U-shaped groove, it must be formed in a thin section approximately at the center of the side wall, and both side walls of the concrete U-shaped groove must be located at the base. Since it is formed to be inclined in a widening shape from the end to the tip, when the insertion rod of the lifting and reversing tool is inserted and lifted, the lifting rod such as a wire rope connected to this insertion rod will be connected to the U This is because it comes into contact with the bulging edge formed at the tip of the side wall of the groove, making it impossible to lift and turn over (see Fig. 3).

Furthermore, as mentioned above, since the lifting and reversing holes had to be formed in the thin walled portions, the concrete U-shaped grooves were easily damaged (see Fig. 3).

[Purpose of the invention] Thus, the present invention has been devised to address the problems and drawbacks of the conventional method, and has both side walls slanted in an expanding shape from the base end toward the distal end.
In the case of a concrete U-shaped groove in which the longitudinal upper and lower edges of the side walls are formed as outwardly projecting bulges, both sides of the concrete U-shaped groove are formed approximately in the longitudinal center of both side walls of the concrete U-shaped groove. A reinforcing wall is provided across the bulge edge and the outer surface is configured as a vertical surface, and at approximately the center of gravity of the U-shaped groove existing on this reinforcing wall, there is a wall extending from the outer surface of the reinforcing wall in a direction perpendicular to the reinforcing wall. By drilling an extending lifting and reversing hole, lifting and reversing can be carried out smoothly, easily, and safely without any modification to conventional lifting and reversing tools. The object of the present invention is to provide a concrete U-shaped groove with a lifting and reversing hole that will not be damaged.

[Structure of the invention] The concrete U-shaped groove with a lifting and reversing hole according to the invention is a concrete U-shaped groove in which both side walls are inclined in an expanding shape from the base end to the tip, and the both side walls are an upper end edge and a lower end edge in the longitudinal direction are formed as bulging edges projecting outward, and a wall between the upper end edge and the lower end edge of the side wall is formed as a thin wall, and the longitudinal direction of the both side walls is formed as a bulging edge. A reinforcing wall is provided approximately in the center, spanning both bulging edges, and the outer surface is configured as a vertical surface.A reinforcement wall is provided approximately at the center of gravity of the U-shaped groove on this reinforcing wall from the outer surface of the reinforcing wall. This structure is characterized by having a pair of reversible lifting holes extending perpendicularly to the wall.

[Example] The present invention will be described below based on an example shown in the drawings.

In the drawings, reference numeral A indicates a U-shaped groove with a lifting and reversing hole according to the present invention. The U-shaped groove A with a lifting reversal hole is formed by both side walls 1, 1 and a bottom plate 2 connecting the both side walls 1, 1.

The side walls 1, 1 are formed in a widening shape from the base end toward the tip, that is, are formed with an inclination such that the ends of the side walls are located outside the perpendicular direction from the base end to the tip of the side wall. ing.

Further, the U-shaped groove A with the lifting reversal hole is formed with bulging edges 3, 3 in which the upper and lower edges in the longitudinal direction of the side walls 1, 1 project outward. The side wall 1 is entirely formed as a thin wall 4 except for its edges.

Further, in the approximately central portion in the longitudinal direction of both side walls 1, 1 of this U-shaped groove A with a lifting and reversing hole, that is, in the approximately central portion in the longitudinal direction where the center of gravity of the U-shaped groove A exists, the upper end edge and the lower end edge of the side wall 1 are provided. Both bulging edges 3, 3 formed in
A reinforcing wall 5 is formed that spans the area and has a vertical outer surface.

Note that a plurality of reinforcing walls 5 may be formed depending on the length of the concrete U-shaped groove in the longitudinal direction (see Fig. 2), but one reinforcing wall must have a pair of lifting inversion holes described later. For drilling, both side walls 1,1
(i.e., approximately at the center of the U-shaped groove A in the longitudinal direction where the center of gravity of the U-shaped groove A is located).

Therefore, the reinforcing wall 5 has a pair of suspensions extending from the outer surface of the reinforcing wall in a direction perpendicular to the reinforcing wall, that is, in a horizontal direction, which is approximately at the center of gravity of the U-shaped groove existing on the reinforcing wall 5. Reversal holes 6, 6 are to be drilled.

Then, a pair of lifting reversing holes 6, 6 are bored at approximately the center of gravity of the U-shaped groove existing on the reinforcing wall 5, and the insertion rods of a pair of lifting reversing tools are inserted into the lifting reversing holes 6, 6. When lifting the U-shaped groove A, it is possible to maintain a stable balance in the vertical and horizontal directions of the U-shaped groove A, and it does not catch on the bulging edge, making it possible to safely invert the U-shaped groove. It can be done quickly and smoothly.

Note that the formation of the lifting reversal holes 6, 6 is not limited in any way;
A buried member having substantially cylindrical lifting and reversing holes 6, 6 bored therein may be used, or a buried member having a hollow pipe-shaped reinforcing pipe and a locking plate having an anchor portion fixed to the reinforcing pipe may be used. Buried within the reinforcing wall 5,
It is also possible to form reinforced lifting and reversing holes 6,6.

Further, the lifting and reversing holes 6, 6 may be configured as blind holes or may be configured as through holes.

In any case, when the insertion rod of the lifting and reversing tool is inserted into the pair of lifting and reversing holes 6 and 6 and the lifting and reversing work is performed, the lifting and reversing holes 6 and 6 are located at the center of gravity of the U-shaped groove that exists on the reinforcing wall 5. The structural requirements are that the rotation axis is on the horizontal axis and the surface walls of the reinforcing walls 5, 5 are located in a direction perpendicular to the rotation axis, that is, the extension direction of the lifting reversal hole 6. It is something that

In the above, the U with a lifting reversal hole according to the present invention
The work of lifting and reversing the groove A is carried out using insertion rods 10, 10 that protrude in the horizontal direction, insertion rod holders 11, 11 that hold the insertion rods 10, 10, and this holder 1.
1 and 11, and a horizontal member 13 to which the pair of lifting rods 12 and 12 are connected.
This can be carried out using an ordinary lifting and reversing tool B consisting of a hanging rod 14 which extends from the horizontal member 13 and is latched to a crane or the like.

That is, the insertion rods 10, 10 are each inserted into the lifting reversal holes 6, 6 drilled at the center of gravity of the U-shaped groove existing on the reinforcing wall 5, and in this state, it is lifted by a crane or the like, and is then moved in the horizontal direction. By rotating the U-shaped groove A with a lifting and reversing hole using the tool B as a rotation axis, the lifting and reversing tool B can be easily and smoothly reversed without applying excessive force.

[Effect of the idea] Thus, the present invention has the above configuration.

The concrete U-shaped groove with a lifting and reversing hole according to the present invention is provided approximately at the center in the longitudinal direction of both side walls, spanning both bulging edges, and a reinforcing wall with a vertical outer surface is formed. At the center of gravity of the U-shaped groove on this reinforced wall, a pair of lifting reversal holes are drilled that extend from the outer surface of the reinforced wall in a direction perpendicular to the reinforced wall, that is, in a horizontal direction. Concrete U-shaped grooves can be lifted and turned over safely, quickly, and smoothly.

Therefore, unlike the conventional U-shaped groove with an inflatable edge, the lifting and reversing work is not time-consuming and dangerous.

Furthermore, even if most of the side walls are thin walls, if the concrete U-shaped groove with lifting and reversing holes according to the present invention is used, there is no fear that the U-shaped groove will be damaged during lifting and reversing.

In addition, by making most of the side walls thin,
Not only can the manufacturing cost be reduced, but the weight of the U-shaped groove can be reduced, so transportability, installation workability, etc. can be improved.

[Brief explanation of drawings]

1 and 2 are perspective views showing an embodiment of the present invention, FIG. 3 is a diagram of a conventional example in use, and FIG. 4 is a diagram of the present invention in use. A... U-shaped groove with lifting reversal hole, B... Lifting and reversing tool, 1... Side wall, 2... Bottom plate, 3... Swelled edge, 4... Thin wall, 5... Reinforcement wall, 6... Lifting inversion hole, 10... Insert rod, 11... Insert rod holder, 12... Lifting rod, 13... Horizontal member, 14...
...hanging rod.

Claims (1)

[Scope of Claim for Utility Model Registration] A concrete U-shaped groove formed with both side walls slanting in an expanding shape from the base end to the tip end, with the upper and lower edges in the longitudinal direction of the both sides walls facing outward. and a wall between the upper end edge and the lower end edge of the side wall is formed as a thin wall, and substantially at the center in the longitudinal direction of the both side walls, both the bulged edges are formed. A reinforcing wall is provided across the wall and the outer surface is configured as a vertical surface, and a lifting inversion hole extending from the outer surface of the reinforcing wall in a direction perpendicular to the reinforcing wall is located approximately at the center of gravity of the U-shaped groove on this reinforcing wall. A concrete U-shaped groove with a lifting reversal hole, which is characterized by having a pair of holes.