KR101042026B1 - Lifting loop set for Precast Concrete Members - Google Patents

Abstract

The present invention is to facilitate the lifting of the precast structure in the production step of the structure (precast structure) made of precast concrete, such as beams, floor plates, girders and concrete slabs, or on-site installation after completion of the production, It is installed in the formwork before pouring, so that after the concrete curing is finished, it is possible to easily lift the precast structure by easily hanging the locking device.

In the present invention, as a precast concrete structure having a bi-hook device (1) to be caught in the shackle 5 for lifting, the bi-hook device (1), the sleeve member 10, the ring 12, and the sleeve A support rod 11 which penetrates the member 10 and the ring 12 and both ends protrude out of the sleeve member 10; Concrete is poured in a state in which the sleeve member 10 is placed vertically, and the bicyclic device 1 is integrally integrated with concrete, with the outer protruding end of the support bar 11 and the outer surface of the sleeve member 10 embedded in concrete. Provided; The ring 12 is located in the sleeve member 10, and when lifted, the upper end of the ring 12 is exposed to the outside of the sleeve member 10 so that the shackle 5 is caught by the ring 12, and the ring 12 A precast concrete structure having a bicyclic device in which a lower portion thereof is caught by the supporting rod 11 and the precast concrete structure is lifted, and such a bicyclic device is provided.

Description

Lifting loop set for precast concrete structure and precast concrete structure equipped with such lifting device {Lifting loop set for Precast Concrete Members}

The present invention relates to a bicyclic device of a precast concrete structure and a precast concrete structure having such a bicyclic device, specifically, a structure made of precast concrete such as a beam, a bottom plate, a girder and a concrete perforated plate (hereinafter, (Previously referred to as "precast structure") and steel structures, or in advance in the formwork before the concrete casting for the production of the precast structure, in order to facilitate the lifting of the precast structure in the field installation stage after completion After the curing of the concrete, the lifting device attached to the rope or sling belt (sling belt), etc. can easily hang the precast structure to lift the lifting device and the precast concrete structure with such a lifting device will be.

In order to shorten the construction period and reduce the construction cost, prefabricated construction methods for prefabricating concrete structures such as beams, bottom plates, girders and concrete slabs are precast in a factory or on-site manufacturing site and installed on the site. In constructing the structure by using such a precast concrete method, after the concrete is cast during the production of the precast structure, it is moved to a curing room for curing, or the finished precast structure is loaded on a transport vehicle or a construction site In several stages, lifting and unloading of the precast structure is carried out repeatedly, including when the precast structure is mounted at an on-site position where the finished product is required.

Conventionally, bilateral ring members such as lugs and the like are fixedly installed on the outer surface of the precast structure, and hooking members connected to ropes and the like are hooked to the bilateral ring members to perform the lifting operations. Representative of the locking member is a shackle (Shackle) provided at the end of the sling belt, in the present specification uses "shackle" instead of the term locking member. However, the term "shackle" should be understood to refer to the catching member that gets caught in the ring.

Since the bicyclic member is generally protruded all the time on the outer surface of the precast structure, it is very inconvenient when the precast structure is loaded and stored, and frequently collides with other structures to destroy the bicyclic ring itself. It was.

In particular, the precast structure such as the perforated plate should not protrude on its outer surface when in use, so after the precast structure is installed, the bicyclic member must be cut, so additional field work is required, and later the double plate is to be removed again. In this case, the lifting operation becomes very difficult because the lifting member is already cut and removed.

In order to alleviate this inconvenience, a method of forming a concave portion on the outer surface of the precast structure and placing a bicyclic member on the concave portion has been proposed. In this case, the bicyclic member is always located at a lower position than the outer surface of the precast structure. It was very inconvenient to fit the shackle to the bilateral ring member. In order to minimize the influence on the structural performance of the precast structure when installing the bicyclic member, it is common to select a small bicyclic member and to narrow the width of the recess. Therefore, when the bicyclic member is positioned in the narrow concave portion, the concave portion is narrow when inserting the shackle into the narrow concave portion and engaging the shackle on the bilateral ring, and then operating the locking device mounted on the shackle. This makes the shackle hanging operation and the shackle locking operation very difficult.

The present invention was developed in order to overcome the problems and disadvantages of the prior art as described above, specifically, in installing a bicyclic device to move the precast structure, performing the operation such as vertically loading the precast structure If necessary, it is possible to prevent the bilateral rings from protruding, if necessary, to prevent them from interfering with the loading operation, and to minimize damage due to impact, etc., because the bilateral rings are always protruding. It is aimed at minimizing the operational inconvenience of fitting the shackle to the bilateral hook and manipulating the locking device of the shackle, which is caused by being always at a lower position than the outer surface of the structure or because the width of the recess is narrow.

In addition, after the precast structure is installed, the use of the precast structure is not impeded without cutting the bicyclic member, and the bicyclic member can be reused even when lifting to remove the precast structure later. It aims at making it possible to use very usefully in the quantity of a member.

According to the present invention, a precast concrete structure having a bicyclic device to which a shackle is to be caught is lifted. The bicyclic device includes a sleeve having a tubular shape, a ring having a closed loop shape and contained in a sleeve member, and A support rod penetrating the sleeve member and the ring and both ends protruding out of the sleeve member; Concrete is poured in the state that the sleeve member is placed vertically with the supporting rod penetrated so that the outer protruding end of the supporting rod is embedded in the concrete, and the bicyclic device is integrated in the concrete with the outer surface of the sleeve member embedded in the concrete. Provided; The hook is located in the sleeve member, and when lifted, the upper end of the ring is pulled upwards of the sleeve member to expose it to the outside of the sleeve member so that the shackle is hooked to the hook and the bottom of the hook is hooked to the support rod to support the lifting load. It is provided with a precast concrete structure having a bicyclic device characterized in that it has a structure to be transferred to the precast concrete structure through the lifting of the precast concrete structure.

In addition, the present invention is provided with a bi-fold ring device provided in the precast concrete structure as described above.

According to the present invention, by pulling the hook to a higher position than the upper surface of the precast concrete structure, the shackle can be conveniently fixed in a sufficient external working space and the safety lock of the shackle can be operated at the same time, thus making the lifting work easier. There is an advantage.

That is, according to the present invention, before the lifting operation is performed, the hook of the bicyclic device is positioned in the sleeve member so that the upper end of the ring is not exposed to the top of the precast structure or is exposed only to a small height, but the lifting operation can be performed. In this case, the loop can be protruded to a sufficient length above the upper surface of the precast structure, so that the shackleing operation and the operation of the shackle locking device can be easily performed outside the precast structure. Will be done.

In addition, in the case of a bottom plate member such as a perforated plate, after installing the bottom plate member in the field, a double ring made of reinforcing steel or steel lugs, etc., used during lifting, is cut out for convenience of use of the bottom plate member. Although additional processes such as removal had to be performed, in the present invention, when the base plate member is lifted and moved, placed on the site and placed in use, and then the shackle is separated from the loop, the bottom of the sleeve member is opened in the open state. Automatically enters the inside of the sleeve member completely and does not protrude to the outer surface of the bottom plate member at all, thus eliminating any inconvenience in use due to the presence of the hook, and for further field work such as removing the hook. The advantage is that it is not necessary at all.

Furthermore, if re-lifting is necessary for movement after use of the precast structure, as described above, the hooks in the sleeve member are pulled out of the sleeve member using a tool to protrude to the outer surface of the precast structure, and then the shackle is hung up and Being able to lift together, thus there is an advantage that no inconvenience, such as installing a separate ring member even when re-lifting at all.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is described as an example, and the technical concept and core construction and operation of the present invention are not limited thereto.

1 and 2 show a schematic exploded attempt and a combined perspective view of a bicyclic ring device 1 according to the invention, respectively.

As shown in the drawings, the bi-fold ring device 1 according to the present invention includes a cylindrical sleeve member 10 and a support rod that penetrates the sleeve member 10 and both ends protrude out of the sleeve member 10. 11) and a closed loop loop 12 hanging on the support rod 11.

Specifically, the sleeve member 10 is a member that is integrated with the precast structure 2 and is a member that is embedded in the concrete when the concrete is poured, and consists of a cylindrical member having a space in the center thereof. The top surface of the sleeve member 10 is open, but the bottom surface may be open or blocked. Opening of the lower surface depends on the kind of precast structure 2 to be used, the method of use, etc., which will be described later. The cross-sectional shape of the sleeve member 10 is circular in the embodiment of the figure, but is not limited thereto, and may be formed in a rectangular or other polygon and various shapes. Moreover, the cylinder diameter size, length, thickness, etc. of the sleeve member 10 can be suitably selected according to the kind, weight, etc. of a precast structure.

The support member 11 made of steel penetrates the sleeve member 10. In the state in which the support rod 11 penetrates the sleeve member 10, an end portion of the support rod 11 protrudes to the outer surface of the sleeve member 10. Thus, as will be described later, the protruding end of the supporting rod 11 is embedded in the concrete of the precast structure. The support rod 11 is a member to which the ring 12 is caught, and when the ring 12 is pulled for lifting, a lifting load is transferred from the ring 12 to the support rod 11 and embedded in the precast structure. The lifting load is transmitted to the precast structure through the end of 11 and the sleeve member 10 through which the support bar 11 penetrates.

If the support member 11 penetrates the sleeve member 10 and the support member 11 is removed from the sleeve member 10 or the protruding end of the support member 11 is not required to be biased to one side, the sleeve member is necessary. After passing the support rod 11 through 10, the support rod 11 and the sleeve member 10 may be welded together at the penetrating part of the support rod 11, and may be integrated.

If the size of the precast structure is increased and the weight is increased, additional welding rods (not shown in the drawing) which are laterally arranged like the supporting rods 11 may be welded to the outer surface of the sleeve member 10 if necessary. It may be. The stationary rod serves to allow the lifting load to be sufficiently transmitted to the precast structure through the sleeve member 10, and the shape of the fixed rod is not necessarily limited to the rod shape, and may be in the form of other protruding hardware.

Lifting loop (12) in the present invention is a loop-like member having a closed structure, as will be described later the shackle (5) is caught. The ring 12 may be made of a general steel or corrosion-resistant steel, galvanized steel or the like to prevent corrosion. The ring 12 may select a diameter, a length, and a shape thereof according to the type and mass of the precast structure. Preferably, the ring 12 is formed in an elliptical shape with one axis extending. In the embodiment shown in the figure is shown that only one ring 12 is provided in the sleeve member 10, the number of the ring 12 can be increased as needed.

Next, a manufacturing process and a use state of the precast structure provided with the bicyclic ring device 1 according to the present invention will be described with reference to FIGS. 3 to 7.

FIG. 3 is a schematic perspective view showing a state in which the double hook device 1 according to the present invention is provided on a thin bottom plate member as an example of the precast structure 2. 4 to 7 are schematic cross-sectional views taken along the line A-A of FIG. 3, showing the process of installing and lifting the biceps device 1 according to the invention on the bottom plate member shown in FIG. 8 is a real photograph of a circle B portion of FIG. 3.

The bicyclic device 1 is arranged so that the sleeve member 10 is vertically placed on the bottom formwork 3 for constructing the bottom plate member. In the case of such a thin bottom plate member, the length of the collar 12 may be longer than the height of the sleeve member 10. In the case where the collar 12 is longer than the height of the sleeve member 10, FIG. As shown in FIG. 4, the lower surface of the ring 12 touches the bottom formwork 3, whereby the ring 12 is inclined. In this state, concrete is poured to construct the bottom plate member as the precast structure 2 (see FIG. 5). At this time, the support bar that protrudes to the outer surface of the sleeve member 10 penetrates through the sleeve member 10 ( The end of 11 is embedded in concrete. When pouring concrete, it is preferable to fit a temporary cover made of a soft material such as plastic or rubber into the hollow of the sleeve member 10 in order to prevent the concrete from flowing into the sleeve member 10.

As shown in the figure, when the thickness of the precast structure 2 is thin, the sleeve member 10 may have a structure in which the lower surface thereof is open, in which case the precast structure 2 may be used to install the sleeve member 10. It is in a state penetrated by, if the bottom formwork 3 is removed after curing of the concrete, the ring 12 sags down due to the weight as shown in FIG. At this time, the upper portion of the ring 12 is in a state hanging on the support bar (11). In this state, when the operator pulls the hook 12 upward by hand or using a tool such as a steel hook, the upper part of the hook 12 is raised above the sleeve member 10, that is, the upper surface of the bottom plate member and exposed. do. When the upper part of the ring 12 is exposed and protruded, the shackle 5 is hooked to the ring 12, and when the sling belt connected to the shackle 5 is pulled, as shown in FIG. The bottom plate member is lifted while the lower portion is caught by the support rod 11.

As such, before the lifting operation is performed, the ring 12 is positioned in the sleeve member 10 so that the upper end of the ring 12 is not exposed or is exposed only at a small height. Can be projected to a sufficient length above the upper surface of the precast structure 2, so that the operation of hanging the shackle 5 and manipulating the locking device of the shackle 5 can be easily performed outside of the precast structure 2. (See Fig. 8).

For example, in the case where the bottom plate member is a perforated plate, when the bottom plate member is lifted and moved, mounted on the site, placed in use, and the shackle 5 is separated from the ring 12, the sleeve member 10 With the bottom surface open, the ring 12 automatically enters completely into the sleeve member 10 as shown in FIG. 6 and does not protrude to the outer surface of the precast structure 2 at all. Therefore, the inconvenience in use due to the presence of the ring 12 does not occur at all, there is an advantage that no additional field work, such as removing the ring 12 at all.

In addition, when re-lifting is necessary for the movement after use of the precast structure 2, as described above, the ring 12, which has been in the sleeve member 10, is taken out of the sleeve member 10 using a tool, and the precast structure is removed. After protruding to the outer surface of (2), it is possible to lift the shackle (5) as above. Therefore, even when re-lifting, there is no inconvenience such as installing a separate ring member at all.

Next, with reference to Figures 9 and 10 will be described another embodiment of the precast structure provided with a bicyclic ring device 1 according to the present invention as described above.

9 and 10 show a case in which the thickness of the precast structure is larger than the length of the sleeve member 10, in which a cross-sectional view showing a state before the precast structure is lifted is shown. 10 is a cross-sectional view showing the lifted state.

 For example, when the thickness of the precast structure is large, such as a girder, the sleeve member 10 does not penetrate the precast structure. In this case, the lower surface of the sleeve member 10 is in a closed state. As described above with reference to the embodiments of FIGS. 3 to 8, in the embodiments of FIGS. 9 and 10, the support rod 11 penetrates the sleeve member 10 and the ring 12 so that both ends of the support rod 11 are sleeved. The bicyclic ring device 1 is provided in the precast structure so that the outer surface of the sleeve member 10 and the support bar 11 are embedded in concrete in the state protruding to the outer surface of the member 10.

At this time, the ring 12 is located in the sleeve member 10. When the length of the ring 12 is less than or equal to the height of the sleeve member 10, the upper end of the ring 12 does not protrude outward. Therefore, the inconvenience caused by the protrusion of the ring 12 when loading the precast structure is not caused.

As described above in connection with the embodiment of FIGS. 3 to 8, when the worker pulls the ring 12 upward by hand or by using a tool such as a hook, the upper portion of the ring 12 rises above the upper surface of the precast structure. It is exposed, and the upper part of the ring 12 is exposed and protrudes and the shackle 5 is hooked to the ring 12. When the rope or the like connected to the shackle 5 is pulled, the lower end portion of the ring 12 is caught by the support rod 11, and the lifting load is transferred from the ring 12 to the support rod 11 and the support rod 11 embedded in the precast structure. The precast structure is lifted while the lifting load is transferred to the precast structure through the end and the sleeve member 10 through which the support rod 11 penetrates.

On the other hand, in the above configuration, when the precast structure does not need to be laminated, and the ring may protrude, the length of the ring 12 may be larger than the height of the sleeve member 10, in which case not in a positive state The upper end of the ring 12 is projected outward, thereby reducing the effort of taking the ring 12 out of the sleeve member 10.

In the above description, the bicyclic ring device 1 according to the present invention has been described as being applied to a precast concrete structure manufactured in a factory or a field production site, but may also be used in a structure made of steel. That is, in the case of a structure made of steel, the support rod may be caught or welded to the steel, and the sleeve member 10 may be integrally disposed on the structure by a method such as bolt or welding.

As exemplified above, the bicyclic ring device 1 according to the present invention can be used very usefully for precast concrete deck members applied to temporary bridge construction and subway construction, but is not limited thereto, such as prestressed bridge decks. It may also be useful for heavy permanent structures, girders such as those illustrated in FIGS. 9 and 10, and other various types of structures.

1 and 2 is a schematic exploded perspective view and a combined perspective view of the bicyclic ring device according to the present invention, respectively.

3 is a schematic perspective view showing a state in which the bicyclic device according to the present invention is provided to a thin bottom plate member as an example of a precast structure.

4 to 7 are schematic cross-sectional views taken along the line A-A of FIG. 3 showing the process of installing and lifting the bicyclic device according to the present invention on the bottom plate member shown in FIG. 3, respectively.

8 is a real photograph of a circle B portion of FIG. 3.

9 is a cross-sectional view showing a state before the precast structure having a thickness greater than the length of the sleeve member is lifted.

10 is a cross-sectional view showing a state in which the embodiment shown in FIG. 9 is lifted.

<Explanation of symbols for the main parts of the drawings>

1: double hook device

10: sleeve member

11: support rod

12: ring

Claims (3)

A precast concrete structure with a bicyclic device (1) on which a shackle (5) for lifting is to be applied, The bicyclic ring device 1 includes a sleeve member 10 having a cylindrical shape, a ring 12 having a closed loop shape and contained in the sleeve member 10, and the sleeve member 10 and the ring 12. It includes a support rod 11 penetrates and both ends protrude out of the sleeve member (10); Concrete is poured in a state in which the sleeve member 10 of the support rod 11 is vertically placed so that the outer protruding end of the support rod 11 is embedded in concrete and the outer surface of the sleeve member 10 is embedded in concrete. The bicyclic ring device (1) is provided integrally with the concrete in the state; The ring 12 is located in the sleeve member 10, but when lifted, the upper end of the ring 12 is pulled upwards of the sleeve member 10 to be exposed to the outside of the sleeve member 10, and the shackle 5 ) Is hooked to the ring 12, the lower portion of the ring 12 is hooked to the support rod 11 has a structure to transfer the lifting load to the precast concrete structure through the support rod 11 to lift the precast concrete structure Precast concrete structure having a bicyclic device, characterized in that. The method according to claim 1, The precast concrete structure is a bottom plate member having a thickness equal to the height of the sleeve member 10; The sleeve member 10 is a precast concrete structure having a bicyclic device, characterized in that the lower surface is open. A double ring device (1), which is integrally installed in the structure and fastened to the shackle (5) for lifting the structure, A sleeve member 10 having a tubular shape and integrated with the structure, A support rod 11 penetrating the sleeve member 10 and both ends protruding out of the sleeve member 10 to be integrated with the structure; It consists of a closed loop loop (12) hanging on the support rod (11); The ring 12 is located in the sleeve member 10, and when lifted, the upper end of the ring 12 is exposed to the outside of the sleeve member 10 so that the shackle 5 is caught by the ring 12, and the ring ( 12) The lower portion of the bicyclic apparatus characterized in that it has a structure to be caught by the support rod (11) to transfer the lifting load to the precast structure through the support rod (11).

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