JPH0513827Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a concrete U-shaped groove, and more particularly to a U-shaped groove with a lifting and reversing hole that can be lifted, reversed, and transported using a lifting and reversing tool.

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

By the way, there are various sizes and shapes of concrete U-shaped grooves, and in particular, as shown in the drawing, the cross section is approximately a semicircular arc, and the tips of both side walls have bulges that extend outward. In the case of a U-shaped groove with a protruding part, a lifting reversing hole for lifting and reversing is formed in each thin wall portion at the approximate center of the side wall, and an insertion rod of a lifting reversing tool is inserted into the lifting reversing hole. There were various drawbacks and problems when lifting and reversing the equipment.

That is, since the above-mentioned lifting and reversing holes are formed in the thin parts at the approximate center of both side walls, when the insertion rod of the lifting and reversing tool is inserted and lifted, a lifting member such as a wire rope connected to this insertion rod is removed. This is because there was a problem in that the handle came into contact with the bulge of the U-shaped groove, and although it was barely possible to lift it, it could not be turned over (see Fig. 6).

Furthermore, since the lifting reversal hole is formed in the thin wall portion as described above, there is a problem in that the concrete U-shaped groove is damaged from that portion.

[Purpose of the invention] Thus, the present invention has been devised to address the problems and shortcomings of the conventional lifting and reversing tools. To provide a U-shaped groove with a lifting and reversing hole that can be smoothly, easily and safely turned over and has no risk of damage to both side walls due to lifting and reversing work.

[Structure of the invention] FIGS. 1 to 5 show the structure of a U-shaped groove with a lifting reversal hole according to the invention.

The U-shaped groove with a lifting reversal hole of the present invention has a substantially semicircular cross section, and a bulge 3 that projects outward is formed at the tip of both side walls 2, 2.

A reinforcing wall 4 having a thickness substantially equal to that of the bulge 3 and whose outer surface is a vertical surface is provided on the outer surfaces of both side walls 2, 2 at both longitudinal ends and approximately at the longitudinal center of the U-shaped groove. Each is formed.

Furthermore, a pair of lifting reversal holes 5, which are bored perpendicularly to the outer surface of the reinforcing walls 4, are provided at substantially the center of gravity of the U-shaped grooves of the reinforcing walls 4, 4 formed in the substantially central portions in the longitudinal direction.
5 is provided.

[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 and reversing hole is configured such that the bottom plate 1 and both side walls 2, 2 are continuously and integrally formed, and have a substantially semicircular cross section.

Further, bulges 3, 3 projecting outward are provided at the tips of the side walls 2, 2, respectively.

The reason why the tip of the U-shaped groove A is thickened due to the formation of the bulges 3 and 3 is because this part may be exposed above the ground, and therefore the thickness is relatively small. This is due to the need to support and reinforce the structure.

However, since other parts are buried underground, they are constructed with relatively thin walls in order to reduce material costs.

Moreover, as can be understood from FIG. 5, at both longitudinal ends and at the longitudinal center of the U-shaped groove A,
Reinforcement walls 4, 4 having substantially the same thickness as the bulging portion 3 and protruding from the outer surfaces of the side walls 2, 2 are formed, respectively. The outer surface of each reinforcing wall 4 is a vertical surface.

Regarding the shape of the reinforcing walls 4, 4, they may be formed to cover the entire outer periphery as shown in FIG. 1, or may be formed up to the lower end of the side wall as shown in FIG. It may be configured in such a shape.

In any case, an important requirement in forming the reinforcing walls 4, 4 is that their outer surfaces are formed as vertical surfaces.

Further, the U-shaped groove A in the reinforcing walls 4, 4 formed in the longitudinal center of the both side walls 2, 2 of the U-shaped groove A
A pair of lifting and reversing holes 5, 5 are formed approximately at the center of gravity.

This lifting reversal hole 5 is bored in a direction perpendicular to the outer surface of the reinforcing wall 4, that is, in a horizontal direction.
It is a blind hole or a through hole extending into the side walls 2, 2 of the groove.

Note that the formation of the lifting reversal hole 5 is not limited in any way, and it may be formed by directly drilling a substantially cylindrical hole in the reinforcing wall 4, or a hollow pipe-shaped reinforcing tube may be formed. An embedding member having a locking plate having an anchor portion fixed to the reinforcing pipe may be buried in the reinforcing wall 4 to form the reinforced lifting reversal hole 5.

In any case, the insertion rod 1 of the lifting and reversing tool B
0 and 10 into the lifting and reversing hole 5 to perform the lifting and reversing work, the rotation axis is on the horizontal axis, and the surface walls of the reinforcing walls 4 and 4 are aligned with the rotation axis, that is, an extension of the lifting and reversing hole 5. It is required to be located perpendicular to the direction.

In the above, the lifting and reversing work of the U-shaped groove A according to the present invention is performed using the insertion rods 10, 10 that protrude in the horizontal direction.
, the insertion rod holders 11, 11 that hold the insertion rods 10, 10, the lifting members 12, 12 connected to the holders 11, 11, and the horizontal portions to which the pair of lifting members 12, 12 are connected. This can be carried out using an ordinary lifting and reversing tool B consisting of a frame member 13 and hanging members 14, 14 extending from the horizontal frame member 13 and latched to a crane or the like.

That is, by inserting the insertion rods 10, 10 into the lifting and reversing holes 5, 5, respectively, and lifting it up with a crane or the like in that state, and rotating the U-shaped groove A with the horizontal direction as the rotation axis, the lifting and reversing tool B is completed. The device shall be able to be easily and smoothly turned over and lifted without applying excessive force to the U-shaped groove A and without getting hit by the bulges 3, 3 formed at the tip of the U-shaped groove A. ing.

As explained above, according to this embodiment, in the U-shaped groove, which has a substantially semicircular arc cross section and has a bulging portion 3 projecting outward at the tip of both side walls 2, 2, the U-shaped groove Reinforcing walls 4 having substantially the same thickness as the bulging portion 3 and whose outer surfaces are vertical are formed on the outer surfaces of both side walls 2, 2 at both ends in the longitudinal direction and at a substantially central portion in the longitudinal direction, respectively. At approximately the center of gravity of the U-shaped groove of the reinforcing walls 4, 4 formed at approximately the center in the longitudinal direction,
A pair of lifting and reversing holes 5 and 5 are provided perpendicularly to the outer surface of the reinforcing wall 4, so unlike conventional U-shaped grooves, reversing work is time-consuming and there is no danger during the work, making it safer. , it can be lifted and turned over quickly and smoothly, and there is no fear that the both side walls 2, 2 will be damaged by the lifting and turning operation.

Further, since reinforcing walls 4 are formed on the outer surfaces of both side walls 2, 2 at both longitudinal ends and approximately at the longitudinal center of the U-shaped groove A, most of the side walls 2, 2 are formed into thin walls. It has high rigidity even when exposed, and there is no risk of damage even if external forces such as shearing force or bending moment are applied to it, or if it is placed on rock or concrete during installation work.

In addition, since most of the side wall 2 is formed of a thin wall, it is possible to not only reduce manufacturing costs despite having high rigidity, but also to reduce the weight of the U-shaped groove, which improves transportability, installation workability, etc. will also be good.

[Effects of the invention] As explained above, in the present invention, in a U-shaped groove having a substantially semicircular arc cross section and a bulge extending outward from the tip of both side walls, the longitudinal direction of the U-shaped groove is A reinforcing wall having a thickness substantially equal to that of the bulge portion and whose outer surface is a vertical surface is formed on the outer surfaces of both side walls at both end portions in the direction and at the substantially center portion in the longitudinal direction, and is formed at the substantially center portion in the longitudinal direction. At approximately the center of gravity of the U-shaped groove in the reinforcing wall, we provided a pair of lifting and reversing holes drilled in a direction perpendicular to the outer surface of the reinforcing wall. It is possible to safely, quickly and smoothly lift and invert without feeling any danger during the work, and there is no risk of damage to both side walls due to the lifting and inversion work.

Furthermore, since reinforcing walls are formed on the outer surfaces of both side walls at both longitudinal ends and approximately at the longitudinal center of the U-shaped groove, even if most of the both side walls are formed with thin walls, the rigidity is high and the shear resistance is high. There is no risk of damage even if external forces such as force or bending moment are applied to it, or if it is placed on rock or concrete surfaces during installation work.

In addition, most of the side walls are made of thin walls, which not only reduces manufacturing costs despite having high rigidity, but also reduces the weight of the U-shaped groove, which improves transportability and installation workability. Becomes good.

[Brief explanation of drawings]

Fig. 1 is a partial sectional view (part 1) showing the structure of the embodiment, Fig. 2 is a partial sectional view (part 2) showing the structure of the embodiment, and Fig. 3 is a partial sectional view (part 2) showing the structure of the embodiment. Part 3), Fig. 4 is a partial sectional view showing how the U-shaped groove according to the present invention is used, Fig. 5 is a perspective view showing the configuration of the embodiment, and Fig. 6 shows how the conventional U-shaped groove is used. It is a partial sectional view. A... U-shaped groove with a lifting reversal hole, B... Lifting reversing tool, 1... Bottom plate, 2... Side wall, 3... Swelling part, 4... Reinforcement wall, 5... Lifting reversing hole, 10...
...insert rod, 11...insert rod holder, 12...hanging member, 13...horizontal frame member, 14...hanging member.

Claims (1)

[Claims for Utility Model Registration] In a U-shaped groove having a substantially semicircular arc cross section and a bulge 3 projecting outward at the tips of both side walls 2, 2, both ends in the longitudinal direction of the U-shaped groove A reinforcing wall 4 having a thickness substantially equal to that of the bulging portion 3 and whose outer surface is a vertical surface is formed on the outer surface of both side walls 2, 2 at a substantially central portion in the longitudinal direction; A reinforcing wall 4 formed in the
4, a pair of lifting reversing holes 5, 5 bored in a direction perpendicular to the outer surface of the reinforcing wall 4 are provided at approximately the center of gravity of the U-shaped groove.