JPH0589385U - Lifting device for structures such as segments - Google Patents

Abstract

(57) [Summary] [Purpose] For example, when removing a concrete segment from a formwork and then changing its posture and carrying it, the work can be carried out safely and safely without taking time, labor and time. Make it possible to save space. [Structure] A segment holding unit in which a reversing beam 15 is rotatably connected to both ends of a horizontally long main beam 12 suspended horizontally by a suspension wire 11 via a horizontal shaft 13, and a segment 2 is fixed to the reversing beam 15. 14 is provided and the segment 2 is fixed to the holding portion 14, the center of gravity G obtained by combining the inverted beam 15 and the segment 2 with each other is set to the horizontal axis 13
It was set so as to exist on the axis L connecting the two. The posture of the segment 2 can be easily changed by rotating the segment 2 together with the reversing beam 15 with a slight force, and the demolding from the mold to the stockyard can be carried by a series of operations.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 INDUSTRIAL APPLICABILITY The present invention is a hoisting device for a structure such as a segment, which is suitable for use in, for example, transporting a concrete segment in the shape of a circular arc plate configured as a tunnel wall by being connected to a stockyard after being manufactured. Regarding

[0002]

[Prior Art]

 As shown in Fig. 4, the above arc plate-shaped concrete segment is usually manufactured by arranging the necessary reinforcing bars on the formwork 1 with the inner surface of the arc facing downward, and then pouring and curing the concrete. is doing. The concrete segment 2 finished by this so-called flat casting method is removed from the formwork 1 and then transported to the stockyard and stored, but when storing, the arc inner surface faces downward. If it is left as it is, the circular arc may spread due to its own weight, so as shown in FIG. 5, one side is placed in a standing state with the side facing down.

In order to put the concrete segment in the stockyard in this posture, the concrete segment 2 on the completed formwork 1 is lifted up by a hanging wire such as a crane to be removed from the mold, and then once removed. Temporarily place it in that position, then hang it by raising the hanging wire and stand with one side down, that is, take the posture shown in Fig. 5, and change the hanging wire so that it hangs the center of gravity if necessary. After that, it is common to transport it to the stockyard with a crane, etc., hold it in a standing position, and lower it to a specified position.

[0004]

[Problems to be solved by the device]

 In the above transportation method, after removing the mold from the formwork, temporarily place it in the demolded posture and hang it by changing the hanging wire, and if necessary, change the hanging wire to hang the center of gravity. Since there are two or three procedures, such as transporting from the ground, it took time, labor, and time, and I was dissatisfied with the fact that the transport work could not be done at once. In addition, there was a problem in that a space for temporary placement had to be secured, and the raising work was dangerous.

The present invention has been made in view of the above circumstances, and does not require time, labor, and time to change the posture of a structure such as a segment to be transported and the transportation work, and is safe and space-saving. It is an object of the present invention to provide a hoisting device for a structure such as a segment, which can be performed by.

[0006]

[Means for Solving the Problems]

 The present invention has been made in order to achieve the above-mentioned object, and includes a main beam suspended by a suspension wire, a main beam rotatably connected to the main beam via at least a pair of horizontal shafts, and a segment. And a structure holding part for holding a structure such as a reversing beam, and the structure holding the pair of horizontal axes in the structure holding part rotates the reversing beam. The center of gravity of the reversing beam and the structure is immovable no matter which position it is rotated with, and the center of gravity is set on the axis connecting the pair of horizontal axes. I am trying.

[0007]

[Action]

 According to the structure lifting device for a segment or the like of the present invention, the structure is engaged with the structure holding portion of the reversing beam to lift the structure, and the structure is rotated together with the reversing beam so that the desired structure can be obtained. Can be converted to a posture. To rotate the reversal beam to invert the structure, a slight force is required because the center of gravity of the reversal beam and the structure is on the axis of the horizontal axis.

Therefore, for example, in the case where the structure is the concrete segment and the concrete segment is demolded from the molding form and then transported to the stockyard as described above, The work can be performed in a series of processes, and as a result, the labor and labor can be reduced, the work time can be shortened, and the work can be performed safely and in a smaller space than before.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In these drawings, reference numeral 10 indicates a hoisting device of one embodiment. This hoisting device 10 is for carrying a concrete segment (structure: hereinafter simply referred to as a segment) 2 manufactured by a mold 1 and carrying it to a stockyard. The segment 2 is an arc-plate-shaped member that is configured as a tunnel wall by being connected in large numbers, and is manufactured by appropriately arranging reinforcing bars on the formwork 1 and placing concrete.

The hoisting device 10 is rotatably connected to a main beam 12 suspended by a hoisting wire 11 and a pair of left and right horizontal shafts 13 with respect to the main beam 12, and is a structure such as a segment. And a reversing beam 15 having a segment holding portion (structure holding portion) 14 for holding

The main beam 12 has vertical members 17 extending parallel to each other integrally formed at both ends of the horizontal beam 16. The main beam 12 is located above the horizontal beam 16 at a position equidistant from the center of the length of the horizontal beam 16. A pair of left and right suspension wire hooks 18 are formed and are made of steel or the like.

The inverted beam 15 has vertical members 20 which are orthogonal to the horizontal beam 19 and which extend in the same direction and which are parallel to each other are integrally formed at both ends of the horizontal beam 19. A pair of right and left segment holding portions 14 projecting in the same direction as the vertical member 20 are formed at positions equidistant from the vertical member 20, and are made of a steel material or the like like the main beam 12. The length of the reverse beam 15 is set to be slightly shorter than that of the main beam 12.

On the segment holding portion 14, a pair of left and right fixing fittings 21 such as bolts that are detachably engaged with the exposed arc outer surface of the segment 2 formed by the mold 1 are respectively attached and detached. It is configured so that it can be engaged. The fixing metal fittings 21 are engaged with the outer surface of the segment 2 at a position equidistant from the center of the length of the segment 2.

The main beam 12 and the reversing beam 15 are relatively rotatably connected by connecting the ends of the vertical members 17, 20 of the main beam 12 and the reversing beam 15, respectively, by the horizontal shaft 13. In this connected state, the horizontal beams 16 and 19 and the vertical members 17 and 20 are parallel to each other, and the left and right suspension wire hanging portions 18 and the segment holding portions 14 are orthogonal to the horizontal beams 16 and 19, respectively. It is on a plane.

According to the hoisting device 10 having the above-described structure, the hoisting wire 11 is hung on the hoisting wire hanging portions 18 of the main beam 12, and the central portion of the length thereof is hoisted by a crane or the like, thereby , 15 are made horizontal, and while keeping this posture, they are moved above the completed segment 2 on the formwork 1 to engage the fixing metal fittings 21 with the segment holding portions 14 of the reversing beam 15, respectively. After that, by lifting the suspension wire 11, the segment 2 can be removed from the mold 1 and lifted.

In this suspended state, the length centers of the main beam 12, the reversing beam 15 and the segment 2 are aligned on the vertical line, and the pair of left and right horizontal shafts 13 are engaged with the segment holding portion 14. The position of the center of gravity G, which is the sum of the two of the reversing beam 15 and the segment 2, does not change and the center of gravity of the segment 2 is immovable, regardless of the position of the revolved beam 15 that rotates with the reversing beam 15. G is set to be on the axis L connecting the horizontal axes 13.

Therefore, the work of rotating the segment 2 together with the reversing beam 15 to change its posture can be performed with a slight force.

Now, the method of using the hoisting device 10 having the above-described configuration and the operation accompanying it will be described. First, as described above, hoisting the beams 12 and 15 in a horizontal state by the hoisting wire 11, After moving the above-mentioned segment 2 to engage the fixing metal fittings 21 engaged with the segment 2 with the segment holding portions 14, respectively, the suspension wire 11 is lifted up, and the segment 2 is moved to the form 1 Remove from the model and lift.

Next, by rotating the reversing beam 15 by 90 degrees, the segment 2 is reversed so that one side surface of the segment 2 is turned upside down, and while keeping this state, the segment 2 is transported to the stockyard by a crane or the like. Put it down in place. The reversal of the segment 2 may be performed immediately after the segment 2 is removed from the mold 1 as described above, or may be performed immediately before the segment 2 is placed in the stockyard.

In order to maintain the horizontal state of the segment 2 removed from the mold 1 and the inverted state rotated by 90 degrees from the horizontal state, for example, as shown in FIG. A pin hole 22 is formed around the horizontal shaft 13 in each of the vertical members 17 and 20 on at least one end side of the reverse beam 15 in the horizontal state and the inverted state, and a stopper pin (not shown) is formed in the pin hole 22. It is preferable to make the structure so as to prevent the rotation of the reversing beam 15 by penetrating.

According to the hoisting device 10 of the present embodiment described above, the process of engaging the segment 2 with the segment holding portion 14 of the reversing beam 15 via the fixing metal fitting 21 is mainly a labor-intensive part of the operator. Therefore, in order to rotate the reversing beam 15 to invert the segment 2, since the center of gravity G of these is on the axis L of the horizontal shaft 13, it can be easily performed with a slight force. In addition, unlike the conventional case, since it is not necessary to temporarily place the segment 2 that has been demolded from the formwork 1, there is no need for a space therefor, and the hanging wire 11 can be hung to replace the segment 2 in the temporary placement space. No need to invert.

Therefore, the work of demolding the segment 2 from the formwork 1 and then carrying and placing it on the stockyard can be performed in a series of processes, and as a result, the labor and labor can be reduced and the work can be performed. The time can be shortened. In addition, the transportation work of the segment 2 can be performed safely and in a smaller space than before.

The hoisting device 10 is an embodiment of the present invention, and its size and shape are appropriately set based on design requirements and the like.

[0025]

[Effect of the device]

 As described above, according to the device for hoisting a structure such as a segment of the present invention, a main beam suspended by a suspension wire is rotatably connected to the main beam via at least a pair of horizontal shafts. And a segment holding part for holding a structure such as a segment, and a reversing beam provided with the pair of horizontal axes. The center of gravity of the reversing beam and the structure is immovable even if the center of gravity is moved to a position that moves, and the center of gravity is set on the axis connecting the pair of horizontal axes. With this feature, the posture of the structure can be changed and the work can be performed without labor, labor and time, and can be performed safely and in a small space.

[Brief description of drawings]

FIG. 1 is a front view showing a usage state of an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a side view showing a stopper mechanism for a reverse beam with respect to a main beam.

FIG. 4 is a side view showing a state where a concrete segment is molded by a mold.

FIG. 5 is a perspective view showing a storage posture of a concrete segment in a stockyard.

[Explanation of symbols]

 2 Concrete segment (structure) 10 Lifting device 11 Hanging wire 12 Main beam 13 Horizontal axis 14 Segment holding part (structure holding part) 15 Reverse beam G Center of gravity L Axis

Claims (1)

[Scope of utility model registration request] 1. A main beam suspended by a suspension wire,
And a reversing beam that is rotatably connected to the main beam via at least a pair of horizontal shafts and that has a structure holding portion for holding a structure such as a segment. The structure is held by the structure holding portion, the center of gravity of the reversal beam and the structure is immovable, even if the structure is rotated to any position with the rotation of the reversal beam, Further, the hoisting device for a structure such as a segment, characterized in that its center of gravity is set on an axis connecting the pair of horizontal axes.