JPH053634Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a lifting and reversing tool for concrete products.

Lifting secondary concrete products such as U-shaped grooves,
Alternatively, this type of tool is used when reversing.

[Conventional technology]

In recent years, the types and amounts of secondary concrete products used in construction work have increased surprisingly. The main reason for this is that the client wants the construction process to be shortened, the construction period to be shortened, and to use high-quality, economical products.

These secondary concrete products have different standards, shapes, and dimensions, and in recent years, many products have become heavy, making it difficult to handle them. As a result, there is no end to industrial accidents during construction.

Despite the utmost care being taken when transporting and installing secondary concrete products, accidents like this occur because there are few secondary concrete products that are designed to be easily lifted during transportation or construction. There is a reason.

[The problem that the idea aims to solve]

Generally, secondary concrete products such as U-shaped grooves are placed upside down on site, so they are turned over during installation, but in the past, this work was done manually by multiple workers.

However, U-shaped grooves are heavy and difficult to handle, making it difficult to maintain balance when lifting. In addition, during the cold season, gloves are used to handle the product, making it difficult to convey the delicate sensations, making it easy for hands to get caught, which is dangerous work, especially for today's workers, who have an older average age. .

The present invention was devised in view of the above-mentioned conventional circumstances, and its purpose was to reduce the weight and difficulty of handling.
Not only can you easily lift and invert unstable and dangerous concrete products, but you can also transport them easily.
To provide a lifting and reversing tool capable of easily installing a concrete product even in a limited space such as between a pair of water lines stretched at a site.

[Means to solve the problem]

In order to achieve the above object, the lifting and reversing tool according to the present invention is constructed as follows.

The lifting and reversing tool of the present invention includes a horizontal member 1, both support members 3, 3 swingably attached to both ends of the horizontal member 1 at substantially right angles, and attached to the tip of each support member 3, It has a reversing member 4 that can be locked to the outer peripheral surface of the concrete product to be reversed.

A substantially rectangular member body 20 forming the reversing member 4
A substantially cylindrical connector 21 provided at the lower end of the support member 3 is rotatably housed inside the member body 2.
0 is rotatable with respect to the support member 3 about its axis.

An insertion rod 7 protruding toward the outer circumferential surface 5 of the concrete product is rotatably provided in a through hole 22 bored in the lower part of the member body 20 via a sleeve 31 .

A flange 23 is formed at the tip of the sleeve 31 into which the insertion rod 7 is inserted, and between the flange 23 and the member main body 20 there is an outer peripheral surface 5 of the concrete product.
A spacer 9 having a variable thickness is interposed to close the gap between the side surface of the member body 20 and the side surface of the member body 20.

Further, a pin hole is formed at the base end of the sleeve 31, into which a stop pin 33 for fixing the locking tool 32 of the head of the insertion rod 7 is inserted.

〔Example〕

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

FIG. 1 is a schematic diagram showing a lifting and reversing tool A for a concrete product B. In the drawings, reference numeral 1 indicates a horizontal member.

Moreover, the code|symbol 3 shows a support member. The support member 3
are formed of wire rope or the like, and are attached to both ends of the horizontal member 1 at substantially right angles and swingably. That is, from the attachment parts 2, 2 formed at both ends of the horizontal member 1, the supporting members 3, 3
is hanging.

A reversing member 4 is attached to the tip of the supporting member 3. The structure of this reversing member 4 will be explained with reference to the drawings.

In the figure, the reference numeral 20 is the main body of the reversing member 4. The member main body 20 is formed as a substantially rectangular case. A connecting tool 21 for connecting the supporting members 3, 3 such as wire ropes and the member main body 20 is housed above the inner surface of the member main body 20.

By the way, this connector 21 is connected to the lower end of the support member 3, and has a substantially cylindrical outer shape. And the upper wall 28 of the member main body 20
The support member 3 is configured to be locked to the member body 20 so that the support member 3 does not come off.

In addition, since such a connector 21 is used,
The member main body 20 is configured to be rotatable about the axis C of the support member 3 as a center line.

As shown in FIG. 6, a threaded portion 29 is formed on the outer peripheral surface of the connector 21, and a threaded portion 29 is formed on the outer peripheral surface of a recess 30 for accommodating the connector 21, which is bored on the upper surface of the member body 20. , both threaded parts 2
By screwing 9 and 29 together, the support member 3 and the member main body 20 can be extremely firmly connected.

Also in the embodiment shown in FIG. 6, the member main body 20 is rotatable about the axis C of the support member 3 as a central pivot.

Note that a through hole 22 is bored in the lower part of the member main body 20, and the insertion rod 7 is inserted through the through hole 22 via a sleeve 31.

A flange portion 23 is provided at the tip of the sleeve 31.
is formed, and an insertion rod 7 is formed at its base end.
A pin hole is drilled through which a stop pin 33 for fixing the head stopper 32 passes.

Further, a plurality of spacers 9 are interposed between the outer surface of the member main body 20 and the collar portion 23 of the sleeve 31.

In the above, when using this reversing member 4, a plurality of spacers 9 are attached to the sleeve 31 according to the distance between the outer circumferential surface 5 of the concrete product B to be reversed and the member main body 20 of the reversing member 4, as shown in the figure. Insert it through and lock it to the flange 23. After that, the insertion rod 7 is inserted into the sleeve 31 attached to the through hole 22 of the member main body 20, and the locking tool 32 is inserted.
Insert the stop pin 33 to fix the insertion rod 7 to the sleeve 31.

At that time, if a plurality of spacers 9 having different thicknesses are prepared, changes in the distance between the outer circumferential surface 5 of the concrete product B and the member main body 20 can be adequately coped with.

Next, the insertion rods 7, 7 of the lifting and reversing tool according to the present invention are inserted into both the locking holes 6, 6 of the concrete product B installed upside down. At this time, both supporting members 3, 3 are attached to both sides of the horizontal member 1 in accordance with the width of the concrete product B. Further, since the support member 3 is made of wire rope or the like and is flexible, the insertion rod 7 can be easily inserted into the locking hole 6.

Next, the hanging members 25 are attached to the mounting parts 2, 2 of the horizontal member 1.
, and lift concrete product B. Then, concrete product B is turned over.

At this time, since the insertion rod 7 of the reversing member 4 rotates together with the concrete product B, it is preferable to inject oil into the through hole 22 to make the rotation of the insertion rod 7 smooth.

Further, the concrete product B is moved to a predetermined installation position, and then the insertion rod 7 is pulled out from the locking hole 6, and the reversing operation is completed.

By the way, if the installation location is in a place where the width of the floor excavation is narrow, or if it is between a pair of water lines, the reversing member 4 is rotated 180° horizontally to remove the inside of the concrete product B, such as a U-shaped groove. Insert rods 7, 7 from the side
are inserted into the locking holes 6, 6, respectively, and lifted. In this way, the concrete product B can be easily installed even in a place where the width of the trench is narrow or between a pair of water threads.

As explained above, according to this embodiment, concrete product B can be lifted, transported, and turned over very easily and safely, so not only can the construction period be shortened and labor costs can be significantly reduced, but also the construction It is possible to keep the incidence of industrial accidents that may occur during the period to an extremely low level.

Further, the member main body 20 of the reversing member 4 is connected to the supporting member 3.
However, since it is rotatable about the axis C, the insertion rod 7 can be inserted not only from the outside of the concrete product B but also from the inside.

Therefore, the concrete product B can be easily installed even in a limited space such as a narrow part of a floor moat or between a pair of water strings.

In addition, the insertion rod 7 is attached to the member body 20 via the sleeve 31 and is rotatable relative to the member body 20, so that the concrete product B can be lifted and reversed smoothly and safely.

Furthermore, since the insertion rod 7 and the sleeve 31 are fixed with a stop pin 33 and can be easily attached and detached, the insertion rod 7, the sleeve 31, and the spacer 9 can be easily attached, removed, replaced, etc. in a short time. can be done.

[Effect of idea]

As explained above, according to the present invention, concrete products can be lifted, transported, and turned over extremely easily and safely, which not only shortens the construction period and thereby significantly reduces labor costs.
This makes it possible to keep the incidence of industrial accidents that may occur during construction to an extremely low level.

Further, since the member body of the reversing member is rotatable about its axis relative to the supporting member, the insertion rod can be inserted not only from the outside of the concrete product but also from the inside.

Therefore, the concrete product can be easily installed in a limited space such as a narrow part of a floor moat or between a pair of water lines.

In addition, the insertion rod is attached to the member body via a sleeve and is rotatable relative to the member body, so that lifting and reversing of concrete products can be carried out smoothly and safely.

Furthermore, the insertion rod and the sleeve are fixed with a locking pin, making it easy to attach and remove.
Attaching and removing sleeves and spacers,
Replacement etc. can be done easily in a short time.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram showing how the present invention is used;
3 is a side view showing a second embodiment of the reversing member, FIG. 4 is a sectional view of FIG. 3, and FIG. 5 is a sectional view of the third embodiment of the reversing member. FIG. 6 is a sectional view of FIG. 5, and FIG. 7 is a sectional view of a fourth embodiment of the reversing member. A...Lifting and reversing tool, B...Concrete product, C...Axis line, 1...Horizontal member, 2...Mounting part,
3...Supporting member, 4...Reversing member, 5...Outer peripheral surface, 6...Locking hole, 7...Insertion rod, 9...Spacer, 20...Member main body, 21...Connector, 22 …
...Through hole, 23... Flange, 25... Hanging member, 2
8...Top wall of member main body, 29...Threaded portion, 30...
... recess, 31 ... sleeve, 32 ... locking tool, 3
3... Locking pin.

Claims (1)

[Claims for Utility Model Registration] A horizontal member 1, both supporting members 3, 3 swingably attached to both ends of the horizontal member 1 at a substantially right angle,
A generally rectangular member body 20 forming the reversing member 4 and having a reversing member 4 attached to the tip of each support member 3 and capable of locking onto the outer peripheral surface of the concrete product to be reversed.
A substantially cylindrical connector 21 provided at the lower end of the support member 3 is rotatably housed inside the member body 2.
0 is rotatable about its axis with respect to the support member 3, and a through hole 22 drilled in the lower part of the member body 20 has an insertion rod protruding toward the outer peripheral surface 5 side of the concrete product. 7 is rotatably provided through a sleeve 31, and a flange 23 is formed at the tip of the sleeve 31 through which the insertion rod 7 is inserted, and between the flange 23 and the member body 20, the concrete Outer surface 5 of the product
A spacer 9 of variable thickness is interposed to close the gap between the side surface of the member main body 20 and the sleeve 31, and a locking pin 33 for fixing the locking tool 32 of the head of the insertion rod 7 is inserted into the base end of the sleeve 31. A lifting and reversing tool for concrete products, characterized by having a pin hole drilled therein.