JP2975986B2 - Reversing method of concrete U-shaped groove - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

An object of the present invention is to lift a concrete secondary product, for example, a concrete secondary product such as a concrete U-shaped groove used for a gutter on a road or a waterway in a field or the like by using a crane or the like, A new type of concrete that can be used to change the posture of a concrete U-shaped groove that has been placed face down, for example, to revert it to the correct posture. An object of the present invention is to provide a method of reversing a U-shaped groove.

[0002]

2. Description of the Related Art Civil engineering projects related to domestic demand expansion policies have recently become very active, such as the development of a farm base, which is being promoted as one of agricultural promotion measures, and the development of a road network, which is being promoted as part of a living environment. I have. One of these civil engineering businesses
There is a construction work of a gutter on the road side and a construction work of a waterway in a field or the like. Until a long time ago, cast-in-place concrete work was frequently used to form these gutters and waterways, but now most of the work is factory-produced and standardized concrete secondary products, The installation of concrete U-shaped grooves and fume pipes has become increasingly practiced.

[0003] Among them, in the case of installation work of a concrete U-shaped groove, regardless of the size of the cross section, the U-shaped cross section is usually in a U-shaped cross section until it is produced from a factory and transported from a stock yard to a site. Handling such as storage, movement, and carry-in is performed in a so-called flat-down state with the opening side down. This is because the lifting work for moving these concrete U-shaped grooves is mainly performed by wire hanging, and for the wire hanging, the U-shaped grooves must be in an inverted position (wires are not connected). The opening of the U-shaped section should face downward from the viewpoint that it must be hung in a groove), to ensure stability during storage, and to prevent foreign matter from accumulating in the U-shaped groove. This is probably due to the fact that is advantageous.

[0004] Since the concrete U-shaped groove brought into the site in a flattened shape cannot be set as it is, the site worker can use any means to operate the U-shaped groove in a normal state, that is, the opening in the U-shaped cross section. The part must be returned to its upside position. In the conventional means, a method of relying on human power by two or three workers has been adopted as the reversing means. However, in any case, it is inefficient because it requires human labor and is accompanied by danger. There is a problem, and when the weight of the member exceeds 100 kg, the work cannot be practically performed because of the excessive force required by two or three people.

[0005] Therefore, a wire is wound around the center, and the lifting fulcrum is located at the lower end side of one of the side walls, and the posture is changed to a lifting shape with a backhoe or the like. It is arranged and formed in the center of both side walls, a dedicated inverter is attached to the embedded metal fitting, and the embedded metal part is used as a rotating part (the axis orthogonal to the axis of the product is a rotating axis), and the reversing work is performed. However, in order to wind the wire, it is necessary to lift some end of the product, and the winding operation itself is complicated. In addition, manufacturing an embedded metal fitting as a pre-embedded product is not only disadvantageous in terms of product unit price, but also requires a dedicated inverter. The direction of rotation is around the axis perpendicular to the product axis, and the radius of rotation is increased, resulting in a disadvantage of lacking stability, necessarily entailing danger, and deteriorating work efficiency. .

[0006] Therefore, instead of wire-hung work,
Several lifting devices have been proposed and are beginning to be used as such. Among the already proposed hanging devices, the most popular one is a clamp type. This is because, according to the thickness of the concrete secondary product, the scissor-shaped clamp-type hanging tool is well-balanced according to the thickness of the secondary product, and the scissor portion exerts a clamping force according to the weight by hanging with a crane, and it does not easily fall off The structure is as described above.

However, in the case of this clamp type hanging device,
In order to use the product's own weight, the lifting direction is the direction in which the own weight acts most effectively, that is, whether the axis is the long axis or the short axis, and the product part that includes the axis that goes in any vertical direction. There is a restriction that the product can only be lifted by sandwiching it in the thickness direction, so that the product axis can be hung so that it can be hung on a horizontal or diagonal part, so that it can be easily installed at a specified location. Was totally unsuitable.

In the present invention, in view of the above situation,
Rather than pinching and lifting the product part of the concrete secondary product that includes the vertical axis, it can be fitted anywhere on the both ends of the concrete secondary product. In the joined state, a pair of metal fittings act in the direction to shorten the gap between the slats, and utilizing the fact that the compressive strength of the secondary concrete product itself is strong, stabilize the state of fitting to the secondary concrete product and lift it up, As a result of continuing the development and research of the hanging device capable of reversing the posture, it has finally come to see here and its realization, and the configuration is as described in detail below.

[0009]

The method of reversing a concrete U-shaped groove according to the present invention has any structure. That is, a concrete U-shaped groove in a flat state where the opening side is laid flat in a U-shaped cross section is parallel to the concrete U-shaped groove side opposite to the direction in which the concrete U-shaped groove is desired to be inverted. After the arranging member has been arranged as described above, one of the cleave hooking members attached to the end of the arranging member is fitted to a place near the ground at one end of the concrete U-shaped groove, and The other cleaver engaging member slidably combined with the member is fitted to the same side, at the other end of the concrete U-shaped groove, close to the ground, while adjusting the sliding. Then, taking care not to disengage each of the cleave hook members from the planned location, gradually lift the lifting fulcrum member upward, and make the concrete U-shaped groove side wall on the side where the cleaver hook members are fitted. Is off the ground, almost U-shaped made of concrete Of the lifting fulcrum member while maintaining the height position substantially constant at the stage where the other side wall of the concrete U-shaped groove is still in a ground contact state while being raised to around a height position corresponding to about the width of the groove. 3. A concrete U-shaped concrete secondary product according to claim 1, wherein the concrete U-shaped groove in a flat state is inverted by gradually moving the position in a desired inversion direction. This is a method of reversing the groove.

As clearly understood from the representative embodiment shown in the drawings, the hanging tool used in this reversing method has a length greater than the length of the concrete secondary product, and is rich in rigidity. A bridging member formed of a material, a pair of wood-mouth locking members arranged in opposition to each other with the bridging member as a supporting portion, and having a length dimension that is at least as long as the bridging member,
It consists of a tough cable member in which both ends are attached to these pair of cleave hook members, and at least one of the pair of cleave hook members is moved from the end of the cross member to the hand member. A range of the length of the concrete secondary product to be lifted, which is slidably combined in a direction along the axis with the transfer member as a guide over a predetermined range and between the ends of the cable member and during the lifting operation. A lifting device having a structure in which a lifting fulcrum member is mounted at an appropriate position of a rope member that is restricted to a position where it is stopped inside.

It is advantageous that the crossover member is made of a lightweight and strong material such as a steel pipe, and its cross section can be of any suitable shape. In other words, in order to regulate the orientation of the pair of lip lock members with respect to the transfer member, and to realize a state where they are always conveniently oriented in the same direction at the time of fitting work to the concrete secondary product, a cross-sectional shape other than a circular cross-section is used. It is expedient to adopt one having a rectangular cross section, for example.
Its length is about 200 to 500 mm longer than the length of a concrete secondary product of a fixed size, and even when the kiguchi hooking member is slid when fitting into both ends of the concrete secondary product, the kiguchi hooking member can be used. Is considered so as not to come off from the delivery member.

The kiguchi hooking member is fitted to the transfer member from both ends thereof, and is slidably fitted in a direction along the axis of the transfer member by using the transfer member as a track. It is formed integrally and has a side U-shaped, L-shaped, etc. hook that can be hooked at the same place according to the wall thickness of the secondary concrete product, and the whole is made up. It shall be integrally molded by casting or the like, or
The sliding fitting portion and the hooking portion are formed separately, and are formed later by welding or other known means. These pair of lip lock members are regulated such that the respective lock portions are opposed to each other, and are fitted to the transfer member by the respective sliding fitting portions, and at least one of them is, It must be assembled so as to be slidable with respect to the transfer member.

[0013] The cable member must be made of a tough material such as a rope, a wire, a chain, or the like, and have a length at least as long as the length of the cross member. Attached to the stop member, and basically a lifting fulcrum member will be attached to the center part, but it is necessary to lift the concrete secondary product by tilting it to the left or right instead of horizontal When it is necessary to handle the asymmetrical concrete secondary product horizontally or horizontally, this lifting fulcrum member is not necessarily limited to the central part of the rope member, but is located between both ends of the rope member. It is possible to select an appropriate position at which the position during the lifting operation stops within the length range of the concrete secondary product to be lifted.

The cable member does not necessarily need to be formed as a single continuous member, but may be divided into two parts as shown in an embodiment to be described later. An appropriate ring or other connecting member is interposed, and a lifting fulcrum member can be mounted using the connecting member, or a hook portion or other acting portion to a cable member formed at a lower end of the lifting fulcrum member Can also be used as a joint of the divided part.

The lifting fulcrum member is a well-known metal fitting such as a hook fitting, a ring material, and an S ring, and is connected to a lower end of a lifting rope such as a wire suspended from a backhoe, a power shovel, or the like. Decision, and fulfills the function of determining the lifting posture of the transfer member. The types of concrete secondary products targeted by the hanging device of the present invention realized by the basic configuration as described above include concrete products having grooves formed therein, such as U-groove products for gutters or field waterways. In addition, a concrete product having a circular cross section such as a retaining wall block having an L-shaped cross section, a fume tube, or a flat concrete product such as a gutter cover can also be used.

The situation where the method of inverting the concrete U-shaped groove, which is the work process, is adopted by using the hanging metal fitting having the above-described structure, is carried into a site from a stock yard such as a manufacturing factory or a store, and flat. A large number of concrete U-shaped grooves, which are in a protruding shape, are lifted and moved to the vicinity of the installation site at the site while the individual concrete U-shaped grooves are in a prone shape, so that the arrangement is substantially as shown in the design drawing. After arranging the concrete U-shaped grooves in the prone position, the concrete U-shaped grooves at the respective positions are corrected so that the grooves that are in a normal posture at the positions face upward.

In the stage before the reversing method, in the work stage of lifting and moving a large number of flat U-shaped concrete grooves brought to the site to the vicinity of the installation site on the site, the concrete of the present invention described above is used. Since the secondary product hanging device functions as a so-called hanging device, just like the conventional hanging device, the concrete secondary product hanging device of the present invention eventually ends up with itself. All the operations up to lifting, moving, reversing, and setting can be shared. Hereinafter, a hanging device for a secondary concrete product, which is representative of the present invention, shown in the drawings, and a method of inverting a U-shaped groove made of concrete using the same, in order to assist in understanding their technical ideas. The respective configurations will be specifically described.

[0018]

Embodiment 1 First, a concrete example of a hanging tool required for inverting a concrete U-shaped groove is shown in a perspective view of the entire hanging tool in FIG. 1 and an exploded part of FIG. This is shown in a partially enlarged front view. The length of the passing member 1 is usually 1800 mm or 2000 m.
m, it is formed, for example, of a square-section steel pipe having a length of about 2500 mm.

The kiguchi hooking member 2 has a rectangular hollow sliding fitting portion 21 whose upper part can be slidably fitted to the above-mentioned cross member 1.
A lower U-shaped engaging portion 22 is formed below the lower portion so that the opening direction of the U-shape faces the hollow direction of the square hollow sliding fitting portion 21. Is welded and integrated with the lower surface of the sliding fitting portion 21;
On the upper surface of the sliding fitting portion 21, a lifting protruding piece 2 having a through hole 23a for attaching one end of a cable member 3 described later is formed.
3 also comprises a structure integrated by welding.

The U-shaped opening width of the hooking portion 22 (the distance between the upper and lower flange portions, ie, the web width) differs depending on the type of the secondary concrete product C, but also accommodates a certain difference in thickness. Somewhat large, eg 150
It is formed to have a size of about mm, and it is possible to lock a state in which the tip of the concrete secondary product C is held with a margin.

One of the pair of clevis hooking members 2 and 2 is slid so that the U-shaped opening direction of the cradle portion 22 is on the other end side of the transfer member 1. Dynamic fitting part 2
1 is fitted to one end of the transfer member 1 and is welded and integrated to that end. On the other hand, the other one of the pair of front end hooking members 2 and 2 fits the sliding fitting portion 21 from the other end of the transfer member 1. At that time, the opening direction of the U-shape of the hook 22 must be regulated so as to be opposite to that of the front edge hook 2, and only the front edge locking member 2 is a transfer member. They must be combined so as to be slidable with respect to one.

If the transfer member 1 fitted in the slidable state is left movable over the entire length of the transfer member 1, when the device itself is lifted alone,
I moved to the other kiguchi locking member 2 and
When the hook 22 is fitted to the tip of the concrete secondary product C, it must be slid greatly, causing inconvenience in handling, and it has been lifted by itself. At this time, since it becomes impossible to handle the transfer member 1 in a horizontal state, in this embodiment,
The restricting projection 11 is formed on the passing member 1 in advance so that the sliding width of the slidable wood-mouth retaining member 2 from the end of the passing member 1 is regulated within a predetermined range.

The cable member 3 is a two-wire material having the same length, and the total length thereof is about 1.5 times the total length of the bridge member 1.
Approximately two times, one end of each
As shown in FIG. 2, detachable metal fittings 31, 31 such as shackles that can be detachably attached to through holes 23a, 23a formed in the respective lifting protrusions 23, 23 of the lip guard 2, 2, respectively. Is attached, and the other end is formed of a structure attached to a lifting fulcrum member 32 formed of a common hanging ring, and the lifting fulcrum member 32 is attached to a lifting hook of a backhoe or another lifting device (particularly, (Not shown)
If it is hung, the center of the rope member 3 can always be lifted, and as a result, the concrete secondary product C to be lifted can be handled in a substantially horizontal state.

Therefore, when it is necessary to lift the concrete secondary product C to be lifted in a special state other than horizontal, the position of the suspension ring in this embodiment is determined to be an appropriate position other than the center. It will be realized by. However, in this case, the position of the lifting fulcrum member 32, that is, any one of the lifting protrusions 23
The length of the cable member 3 having a longer distance from the
Is not limited to a range that does not exceed the full length of
At the time of hoisting, the tip end hooking member 2 connected to the end of the rope member 3 having a shorter length from the lifting fulcrum member 32 to the lifting projection 23 is a tip of the concrete secondary product C. The lifting fulcrum member 32 can be easily detached from the cable, so that the combination position of the lifting fulcrum member 32 is between both ends of the cord member 3 and the position during the lifting operation is within the length range of the concrete secondary product C to be lifted. The rope member 3 restricted to the stop position must be in place.

The method of inverting the concrete U-shaped groove using the hanging tool having the above-described structure will be specifically described with reference to the drawings in FIG. 3 and the following drawings. In this invention, the concrete U-shaped groove C1 in the flat-down state shown in FIG. 3, which is placed flat with the opening side down in the U-shaped cross section, is suspended by a lifting device (not shown). As shown in FIG. 5, the supporting member is moved from the state shown in FIG. 4 such that the auxiliary worker is parallel to the side surface of the concrete U-shaped groove C1 opposite to the direction in which the concrete U-shaped groove C1 is to be inverted. First, one of the cleave hooking members 2 slidably or attached to the end of the handover member 1 is attached to a concrete U-shaped member.
First, it is fitted to a location close to the ground G at one end of the side of the groove C1 at the edge of the tip.

Subsequently, the auxiliary worker P makes the other cleave hook member 2 slidably combined with the transfer member 1 the same as the side wall on which the cleave engaging member 2 is fitted. The other end of the side wall is fitted to the location near the ground at the other end of the tip, while sliding and adjusting, and the state where both the tip ends 2 and 2 are fitted to the respective tips of the same side wall. Realize. This state is maintained, that is, the auxiliary worker P temporarily
And one of the lip ends 2 is supported by hand so that the lip ends 2 and 2 do not deviate from a predetermined location on the side wall of the concrete U-shaped groove C1.
From the state of FIG. 6 to FIG.
, And then gradually raised to the state shown in FIG.

Thereafter, when it is necessary to move the place, the place is further lifted and moved in the state shown in FIG. To continue the work without moving from the place where it was initially set aside, the concrete U
Without lifting the groove C1, the long side end of the concrete U-shaped groove C1 side (the side wall end other than the both ends) on the side where the wood mouth fitting members 2 and 2 are fitted from the ground G. Away from the concrete U-shaped groove C1 and rise up to a height position corresponding to the groove width of the concrete U-shaped groove C1.
At the stage where the other side wall of the groove C1 is still in the ground contact state, the lifting fulcrum member 32 is maintained while maintaining the height position substantially constant.
Is gradually moved in the desired reverse direction (left direction in the figure).

Then, the concrete U-shaped groove C1 is
FIG. 10 shows a state in which the other side wall which is still in the grounded state is naturally rotated around the longitudinal end of the other side wall, and the opening side in the U-shaped cross section is opened on the side opposite to the desired reverse side. As shown in FIG. 11, the side wall on which the lip ends 2 are fitted becomes substantially horizontal upward, so that the position of the lifting fulcrum member 32 is continuously moved in the desired reversal direction as shown in FIG. Then, the U-shaped cross section can be returned to the desired state as shown in FIG. 12 in which the opening side is correctly oriented upward, and the inverting operation of the concrete U-shaped groove C1 in the prone state is completed. In other words, the concrete U-shaped groove is inverted using the above-mentioned hanging device for a concrete secondary product of the present invention.

[0029]

According to the method for reversing a concrete U-shaped groove of the present invention having the above-described structure, a hanger used in the reversing method utilizes an attribute excellent in axial compressive strength, and a rope member. Is lifted upward at the lifting fulcrum member, so that the cleave hook members at both ends are restricted by the passing member and must be slid in the axial direction. , And become strongly attracted in the direction in which they face each other, acting as an external compressive force in the axial direction on both edges of the concrete secondary product, and exerting a strong frictional force between the edge of the edge and the edge of the edge. The concrete secondary product functions to prevent the deviation of the position of the concrete secondary product from the predetermined location of the concrete secondary product of each of the wooden clasps, thereby finally allowing the concrete secondary product to be lifted simply and reliably. The other end of the concrete secondary product C is connected to the other end of the concrete secondary while pulling the transfer member 1 by fitting the leading end holding member 2 whose sliding is restricted to the one end of the secondary side of the concrete secondary product C. The cable is engaged with the edge of the product at the edge of the product, and the two hooks 2 and 2 are held in a state of engagement with the edge of the edge of the concrete secondary product at the edge of the concrete secondary product. The lifting operation of the lifting fulcrum member 32 of the member 3 can be performed upward, and there is an advantage that an efficient and safe lifting operation can be performed by only the operator of the lifting device and the auxiliary worker. It has become.

Therefore, the method for inverting a concrete U-shaped groove of the present invention, which is carried out using this hanging tool, is a concrete U-shaped groove which has been placed in a prone position unless several workers are used before. The task of reversing the attitude of the grooves and various concrete secondary products that could not be returned to a normal state was replaced by an operator operating the lifting device, an auxiliary worker, and an auxiliary worker. Workers require little technical skill, so even in some cases, female workers can respond adequately, and the work content is extremely safe and reliable. Of the occupational safety standards, the lifting of objects by the backhoe has been approved. In addition to the reversal of the posture of the concrete U-shaped groove on the side of the groove that can be installed and installed, it will be possible to perform the installation up to the installation very smoothly and quickly. It is expected that it will be adopted and will greatly demonstrate its power.

As mentioned above, the concrete U of the present invention
The method of reversing the groove, compared to the method that has been implemented up to now, has excellent effects not only in terms of handling operability but also in terms of economy and manufacturing, The present invention is extremely effective in safely and efficiently installing a concrete U-shaped groove and a concrete secondary product similar thereto.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show only one embodiment representative of the invention.

FIG. 1 is an overall perspective view of a hanging device for a concrete secondary product.

FIG. 2 is an enlarged perspective view of a main part in a state where a part thereof is disassembled.

FIG. 3 is a cross-sectional view of a concrete secondary product which is required to explain a reversing method and is in a prone state.

FIG. 4

FIG. 12 is a process diagram illustrating a reversing operation process.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transfer member 11 Same protruding piece 2 Kiguchi hooking member 21 Same Sliding fitting part 22 Same hanging part 23 Same Lifting protruding piece 23a Same through hole 3 Cable member 31 Same detachable member 32 Same lifting fulcrum member C Concrete secondary Product C1 Same concrete U-shaped groove G Ground P Auxiliary worker

Claims (1)

(57) [Claims] 1. A concrete U-shaped groove which is opposite to a direction in which the concrete U-shaped groove is desired to be inverted with respect to a concrete U-shaped groove in a U-shaped cross-section where the opening side is laid flat and flat. After arranging the crossing member so as to be parallel to the side surface, one of the cleave hooking members slidably or attached to the end of the traversing member is connected to the ground at the one groin side end of the concrete U-shaped groove side wall. The other tip of the same side wall as the side wall to which the tip end engaging member is fitted, while being fitted at a location close to At the side end near the ground, it is fitted while sliding adjustment, taking care not to disengage each cleave hook member from the predetermined position, gradually pulling up the lifting fulcrum member upward, Made of concrete on the side where the wood mouth fitting member is fitted A stage in which the U-shaped groove side wall is separated from the ground and rises to a height position corresponding to approximately the groove width of the concrete U-shaped groove, and the other side wall side of the concrete U-shaped groove is still in a ground contact state. to gradually by moves in the reverse direction to the desired position of the fulcrum member lifting while maintaining a substantially constant height position, and characterized in that so as to invert the concrete U-shaped groove of Hirefuse state
Inversion method concrete U-shaped groove.