JP2815039B2 - Self-elevating formwork device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-elevating formwork apparatus used for constructing a concrete structure which is continuously high in the upward direction, such as a dam or a pier.

[0002]

2. Description of the Related Art In general, concrete structures such as dams and bridge piers, which are considerably high and continuous upward, are constructed by successively pouring concrete from bottom to top.

[0003] When constructing this type of structure,
The formwork is used by being lifted upside down by using a crane, etc., but it is extremely inefficient, so recently it has been constructed so that it can be turned upside down alternately with concrete splicing. Self-elevating formwork is used.

Conventionally, as this type of self-lifting formwork, for example, a formwork installed at the upper end thereof along a wall surface of a concrete body already constructed, and a formwork installed on this formwork, It is generally known to include a demolding device that separates from a wall of a concrete body after completion of construction curing and a lifting device that raises the demolded formwork to the next concrete placing block ( See JP-B-63-37405, JP-A-63-197760, etc.).

[0005] The basic operation is, for example, when the splicing and curing of the concrete are completed, the demolding device is operated to separate the form from the wall surface of the concrete frame, and then the lifting device is operated to operate the lifting device. Raise the formwork to the position of the next concrete placing block and fix it in that position, then disconnect the lifting device from the wall of the concrete skeleton and operate the lifting device again to raise the The operation of raising to the position and fixing the position is repeated.

[0006]

The conventional self-elevating formwork apparatus is constructed as described above. However, most of them require the installation of two elevating apparatuses in each formwork. However, there is a problem that the cost is extremely high and it is extremely uneconomical. Further, there has been developed an apparatus in which the left and right forms are alternately raised by one lifting device (Japanese Patent Laid-Open No. 4-2).
However, there are problems such as a complicated structure, difficult operation, and poor workability.

Further, hydraulic cylinders are frequently used as power for operating the elevating device and the demolding device in the elevating device for elevating the formwork and the demolding device for demolding the formwork. In addition to the hydraulic piping being complicated, the hydraulic cylinder is not easily synchronized, and there is a problem that the mold can not be smoothly removed and raised.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a self-elevating mold capable of smoothly removing and rising the mold and simplifying the apparatus. It is intended to provide a device.

[0009]

According to the present invention, there is provided a self-elevating formwork apparatus comprising: an outer casing connected to one of the left and right formwork; An inner casing installed in the outer casing and connected to the other of the left and right formwork, and inserted through the inner casing in a vertical direction, and connected to one of the outer casing or the inner casing. An externally threaded shaft, a drive motor connected to the end of the externally threaded shaft and rotating the externally threaded shaft, and an internal thread screwed to the externally threaded shaft and connected to the other of the outer casing or the inner casing. It is configured with a screw type jack having a piston rod, and
One of the left and right molds is configured to receive a reaction force and slide the outer casing and the inner casing to raise the other mold.

[0010]

1 to 8 show an embodiment of a self-elevating formwork apparatus according to the present invention. In the figures, reference numerals 1 and 2 denote the upper end of a concrete skeleton 3 which has been installed and the wall surface thereof. Formwork that is installed alongside and cures the concrete that is newly cast on the concrete frame 3 is installed between the left and right formwork 1 and 2, and the left and right formwork 1 and 2 are installed. 5a and 5b are the left and right formwork 1,
A reaction support column, which is installed at the end of the support member 2 and receives a reaction force when the left and right forms 1 and 2 are lifted by the lifting device 4;
Are installed on the left and right sides of the ascending device 4, and demolding devices for separating the left and right formwork 1, 2 from the wall surface of the concrete frame 3. This is a mounting adjustment device provided with a motor-operated screw type jack for adjusting the mounting of the molds 1 and 2.

The formwork 1 is constructed by combining vertical ribs 1a and horizontal ribs 1b in a cross-girder form, attaching a plurality of weir plates 1c to side surfaces thereof, and reinforcing them with a plurality of braces 1d. Form 2 is also composed of a plurality of vertical sheets 2a, horizontal sheets 2b, weir plates 2c.
And the brace 2d are configured similarly to the mold 1.

The lifting device 4 includes an outer casing 4a, an inner casing 4b installed in the outer casing 4a, and right and left sides of the outer casing 4a mounted along the outer casing 4a. Jack brackets 4c and 4d respectively fixed to the inner casing 4b, a shaft 4e with a male thread inserted through the inner casing 4b in the vertical direction, and connected to the lower end of the shaft 4e with the male thread, It is provided with a screw type jack comprising a drive motor 4f for rotating the externally threaded shaft 4e and an internally threaded piston rod 4g screwed to the externally threaded shaft 4e (see FIGS. 4 to 7).

At the upper ends of the left and right jack brackets 4c and 4d, fixed plates that can be hooked on brackets 8, 8 projecting horizontally from the upper ends of the left and right reaction force receiving columns 5a, 5b, respectively.
9 and 9 are projected horizontally, and the fixing plates 9, 9 are bolted to the brackets 8, 8, so that the upper end of the lifting device 4 can be detachably attached to the upper ends of the left and right reaction force receiving columns 5a, 5b. Fixed.

At the center of the jack brackets 4c and 4d, hooks 11 which can be hooked on the male threaded receiving pins 10a of the positioning brackets 10 protruding substantially at the center of the right and left reaction force receiving columns 5a and 5b, respectively. Is formed, this hook 11
To the receiving pin 10a with a male thread and tighten the positioning nuts 10b, 10b on both sides of the receiving pin 10a.
The central portion of the lifting device 4 is detachably supported by left and right reaction force receiving columns 5a and 5b (see FIGS. 5 and 8). The positioning nuts 10b, 10b adjust the position of the lifting device 4 in the lateral direction.

Since the lifting device 4 is supported by the left and right reaction force receiving columns 5a and 5b by such a configuration, installation and removal of the lifting device 4 are simplified, and one lifting device 4 is provided.
Has the effect of being able to be used in multiple places.

Further, the shaft 4e with the external thread is a drive motor.
The piston rod 4g, which is connected to 4f and is internally threaded, is connected to the inner casing 4b. Then, one of the outer casing 4a and the inner casing 4b is fixed, and the drive motor 4f
When the shaft 4e with the external thread is turned by operating, the other of the outer casing 4a and the inner casing 4b is slid up and down to expand and contract (see FIG. 7). A sliding member 4h made of a resin material or the like is interposed between the outer casing 4a and the inner casing 4b so that the outer casing 4a and the inner casing 4b slide smoothly (see FIGS. 2 and 3).

The reaction force receiving columns 5a and 5b are attached to the ends of the left and right molds 1 and 2, respectively, and are fixed to the molds 1 and 2, respectively. During the construction of the concrete skeleton 3, both the reaction receiving struts 5a and 5b are fixed to the wall surface of the already-constructed concrete skeleton 3 by a plurality of anchor bolts 12, and the molds 1 and 2 are removed and raised. In the case of
One of the reaction support columns is fixed so as to receive a reaction force when the mold is removed and raised.

The demolding device 6 includes a rod 6a with an external thread, which is vertically mounted on the reaction receiving columns 5a, 5b, an internally threaded gear 6b screwed to the externally threaded rod 6a, and an internally threaded gear 6b. A gear 6c meshing with the gear 6c, a drive motor 6d for rotating the gear 6c, and a rod 6a with an external thread, a gear 6b with an internal thread, a gear 6c and a drive motor 6d, which are protrudingly provided on the side of the inner casing 4a of the upper layer device 4. It is configured with a screw type jack having a storage case 6e for storing (see FIGS. 2 and 3).
Further, the storage case 6e of the left and right demolding device 6 is fixed to the outer casing 4a and the inner casing 4b, respectively.

In such a configuration, for example,
And the reaction support column 5b are fixed, and the form 1 and the reaction support column are fixed.
Separate 5a from the wall of concrete frame 3,
When the drive motor 6d is operated to rotate the gear 6d to rotate the gear 6c, the gear 6b rotates, whereby the mold 1 moves back and forth to set and remove the mold 1 and the drive motor 4f To rotate the shaft 4e, the outer casing 4a
Then, the inner casing 4b slides up and down, and the formwork 1 and the reaction force receiving support 5a rise.

The mold 1 and the reaction support column 5a are fixed at that position, and the form 2 and the reaction support column 5b are separated from the wall of the concrete frame 3.
When the gear 6d is turned to rotate the gear 6c, the gear 6b rotates, whereby the mold 2 and the reaction force receiving support 5b are moved back and forth, so that the mold 2 can be set and removed. When the drive motor 4f is operated and the shaft 4e is turned, the outer casing 4a and the inner casing 4b slide, and the form 2 and the reaction force receiving support 5b rise to the level of the form 1.

In such a configuration, a construction method using the self-elevating formwork apparatus according to the present invention will be described step by step.

The left and right formwork 1 and 2 are set and fixed on the upper end portion of the concrete skeleton 3 that has been installed along the wall surface of the concrete skeleton 3.

The left and right forms 1 and 2 are fixed by fixing the vertical ribs 1a and 2a and the reaction support columns 5a and 5b of the left and right forms 1 and 2 to the wall surface of the concrete frame 3 with anchor bolts 12. Do. Note that the left and right formwork 1 and 2 are fixed after being positioned in the up-down direction and the front-rear direction by the mounting adjustment device 7.

Further, a gap adjusting member 13 is attached to a gap between the left and right molds 1 and 2. The gap adjusting member 13 is of a leaf spring type as shown, and is configured to be easily attached and detached (see FIG. 2).

When the setting of the left and right formwork 1 and 2 is completed, concrete is sprinkled on the already-constructed concrete skeleton 3 and sufficiently cured.

When the concrete has developed sufficient strength, the anchor 1 that removes the form 1 and the reaction force receiving support 5a is removed, and the form 1 is released.

Next, the mold release device 6 is operated to separate the form 1 and the reaction force receiving support 5 a from the wall surface of the concrete frame 3. Next, after removing the mold, remove the gap adjusting member 13,
Subsequently, the lifting device 4 is operated to raise the form 1 to the next concrete placing block. And vertical
1a and the reaction support strut 5a are fixed to the wall surface of the concrete skeleton 3 with the anchor bolt 12 to fix the form 1 again.

Next, the anchor bolts 12 fixing the form 2 and the reaction force support column 5b are removed, and the fixing of the form 2 is released.

Next, the mold release device 6 is operated to separate the form 2 from the wall surface of the concrete frame 3. Next, the lifting device 4 is operated to pull up the form 2 and the reaction force receiving support 5b to the raised position of the form 1. Then, the vertical rib 2a and the reaction force receiving support 5b are fixed again to the wall surface of the constructed concrete skeleton 3 with the anchor bolts 12. And left and right formwork
After setting 1 and 2, new concrete is used.

In the same manner, a concrete structure is constructed by repeating the setting of the left and right molds 1 and 2, the driving of concrete, the removal of the left and right molds 1 and 2, and the rising.

[0031]

As described above, in the self-elevating formwork device according to the present invention, the left and right formwork can be alternately lifted by one lifting device by receiving one of the reaction forces. In addition, the form can be raised very efficiently, and the workability can be improved.

Since the lifting device is provided with a screw type jack operated by a motor instead of a hydraulic cylinder for operating the lifting device, the jack can be easily tuned and a small movement can be easily operated. Setting, demolding and ascent of the formwork can be performed smoothly,
In addition, there is an effect that the surroundings of the site are prevented from being complicated by hydraulic piping, and the apparatus can be simplified.

[Brief description of the drawings]

FIG. 1 (a) is a plan view of a self-elevating formwork device according to the present invention, and FIG. 1 (b) is a front view thereof.

FIG. 2 is a partial cross-sectional view of the self-elevating formwork device shown in FIG. 1 showing the structure of a lifting device and a demolding device.

FIG. 3 is a partial cross-sectional view of the self-elevating formwork device shown in FIG. 1 showing the structures of a lifting device and a demolding device.

FIG. 4 is a plan view of a lifting device and a demolding device of the self-elevating formwork device shown in FIG.

FIG. 5 is a front view of a lifting device and a demolding device of the self-elevating formwork device shown in FIG. 1;

FIG. 6 is a side view of a lifting device and a demolding device of the self-elevating formwork device shown in FIG.

FIG. 7 is a longitudinal sectional view showing an outline of a lifting device of the self-elevating formwork device shown in FIG. 1;

8 (a) is an enlarged front view of a portion A in FIG. 5, and FIG. 8 (b) is a side view thereof.

[Explanation of symbols]

1,2… form, 3… concrete skeleton, 4… lifting device, 4a
... outer casing, 4b ... inner casing, 4c, 4d ... jack bracket, 4e ... shaft with external thread, 4f ... drive motor, 4g ... piston rod with internal thread, 4h ... sliding member, 5
a, 5b… reaction support column, 6… detachment device, 6a… rod with male thread, 6b… gear with internal thread, 6c… gear, 6d… drive motor, 6e… storage case, 7… building adjustment device, 8 ... Bracket, 9 ... Fixed plate, 10 ... Positioning bracket,
10a ... receiving pin with male thread, 10b ... positioning nut, 11
... hooks, 12 ... anchor bolts, 13 ... gap adjusting members.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akio Nakamura 3-10-5 Misaki-cho, Chiyoda-ku, Tokyo (Third Harashima Building) In the Tokyo branch of Suga Machine Industry Co., Ltd. (72) Inventor Kazuhiro Yamanaka Hyogo 1-21, Fuso-cho, Amagasaki City, Sumikin Steel Industry Co., Ltd. (58) Field surveyed (Int.Cl. ⁶ , DB name) E04G 11/28

Claims (1)

(57) [Claims] 1. A structure in which a left and right formwork installed next to each other is raised by a lifting device installed between the left and right forms along the wall surface of a concrete skeleton to a next concrete placing block. In the self-elevating formwork device, the lifting device includes an outer casing connected to one of the left and right formwork, and an inner casing installed in the outer casing and connected to the other of the left and right formwork. When,
An externally threaded shaft that is inserted through the inner casing in the up-down direction and connected to one of the outer casing or the inner casing; and a drive that is connected to an end of the externally threaded shaft and turns the externally threaded shaft. A motor and a screw-type jack comprising an internally threaded piston rod which is screwed to the externally threaded shaft and connected to the other of the outer casing or the inner casing; and A self-elevating formwork device characterized in that one of the reaction forms receives a reaction force to slide the outer casing and the inner casing to raise the other formwork.