JP3049402B2 - Supporting type scaffold form lifting device and concrete skeleton construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column-type scaffolding form lifting apparatus which can be used for construction of a hollow concrete skeleton and a method of constructing a hollow concrete skeleton.

[0002]

2. Description of the Related Art In a skeleton construction work for constructing a hollow box-shaped structure used for a bridge foundation or a basement with concrete, a base concrete is cast, and a formwork is set on the base concrete by a crane. Concrete is poured into the formwork, and then the formwork is removed using a crane. Further, the formwork is lifted above the concrete placed by the crane, and The structure is constructed by repeating the process of placing concrete again.

[0003] However, in the above-described skeleton building operation, since the crane is used for the form setting, the form removing operation, the form raising operation, and the like, the operation is easily affected by the crane, that is, the crane is set. The space required is as large as possible, the formwork is lifted by a crane, and it is easily affected by the wind.Therefore, there is a danger to workers on the external scaffolding. Therefore, there is a disadvantage that the crane needs to be further enlarged, the place of the crane set needs to be further widened, and it is more susceptible to the wind and the danger increases.

Therefore, in recent years, there has been provided a construction method of supporting and ascending a form without using a crane. In this method, for example, a column of a predetermined height is fixed to the base concrete using an anchor, and a form is provided on the column so as to be movable up and down, and concrete is poured into the form.
The concrete wall (body) is built by repeating the process of removing the mold, raising the form by a predetermined distance, and placing the next concrete in this form, and building a higher concrete wall (body) In the case where the formwork is already fixed to the concrete wall which has been cast and solidified, the anchors are released from the anchor and lifted up, and fixed in place to the solidified concrete wall with the anchor again. It is constructed by repeating the same steps as above.

[0005]

However, in the above-mentioned construction method, the construction work is hindered if the anchor work occupies a large proportion and the anchor mounting accuracy is not good, so that the efficiency of the construction work of the frame is deteriorated. Moreover, when the anchor comes off the concrete wall, there is a drawback that the formwork falls and there is a risk of occurrence of disaster.

The present invention has been made in view of the above circumstances, and provides a pillar-type scaffold form-raising apparatus which does not require a crane or an anchoring operation, has high working efficiency, and is highly safe, and a method of constructing a concrete frame. It is intended to be.

[0007]

According to a first aspect of the present invention, there is provided a pillar-type scaffold form-raising apparatus.
A steel pipe slidably mounted vertically on the support column and detachable by a locking means, a scaffold fixed substantially horizontally to the steel pipe, a formwork fixed substantially vertically to the scaffold ;
A jack that raises the scaffold by taking a reaction force from the support post
And the rise of the above scaffold are guided by the constructed skeleton
And a guide member provided on the scaffold to
The jack part includes a jack body mounted on the scaffold and the jack body.
The jack is inserted between the jack body and the support
Engage and disengage the support to transmit the body reaction force to the support
And a load transmitting member capable of being engaged.
You.

According to a second aspect of the present invention, after the base concrete is cast, the column-type scaffold form lifting device according to the first aspect is erected on the base concrete. It is installed slidably up and down on columns and concrete is poured into the formwork to build the frame.
After forming, then, after connecting the next support to the upper end of the support, the jack body is extended to form a scaffold and a formwork by the skeleton constructed by the guide member.
The steel pipe is integrally raised along the column while being inserted, and the steel pipe is locked to the column by the locking means. Thereafter, the following steps are repeated. Retract the jack body
And cast concrete into the formwork
Form a body, connect the next post to the top of the above post,
Then, the load transmitting member is attached to a support at a position below the steel pipe.
After being engaged with the support by the locking means,
Unlock the steel pipe and extend the jack body.
As a result, a reaction force is taken from the support via the load transmitting member.
The scaffold and the formwork are assembled by the guide member.
Raised along the pillars integrally while being guided by the body
Thereafter, the steel pipe is locked to the column by the locking means.

[0009]

According to the pillar-type scaffold form lifting device of the first aspect of the present invention, the scaffold and the formwork are fixed to the steel pipe, and the steel pipe is externally slidably moved up and down on the pillar. by joining the top posts in order from the bottom, the pillar scaffold formwork increase device can be increased to a desired height, thus it is possible to easily construct the desired height of the concrete wall, scaffolding Load jack body mounted on
While engaging with the support via the transmission member,
The steel pipe is locked to the column by the locking means,
And guide members such as guide rollers provided on the scaffold
Guide the rise of the scaffold by the installed concrete wall
This makes it possible to easily and stably raise the support type
Can be raised.

According to a second aspect of the present invention, there is provided a method of constructing a concrete frame, wherein a scaffold and a form are raised along a support by repeatedly expanding and contracting a jack portion of a support-type scaffold form raising device. The concrete body is cast to build a concrete frame, which improves safety without being affected by wind compared to the conventional crane, and eliminates the need for a formwork and a crane for elevating the scaffold. Therefore, the space required for construction work can be minimized, and the work process when setting and raising the formwork is simplified compared with the case of anchor work, dramatically improving the efficiency of construction work Further, when constructing a concrete skeleton having a large number of hollow chambers in a plane, a plurality of pillar-type scaffolding form lifting devices are prepared for the number of hollow chambers, and concrete walls defining each hollow chamber are provided. Because they can be constructed in parallel with each post scaffold formwork rises apparatus, shortening of the construction process,
Cost can be reduced.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 and FIG. 2 show one embodiment of a pillar-type scaffolding frame lifting device according to the present invention. In the drawings, reference numeral 1 denotes a pillar. This support 1 is G on the upper surface of the base concrete B.
It has been erected through the C jack 2, the steel pipe 3 in the post 1 is slidably fitted in the vertical direction, this steel
The pipe 3 is supported by a support pin 1 by a fixing pin (locking means) 31 described later.
The system is detachably locked to the system. In FIG. 2, four pillars 1 are erected at predetermined intervals in the vertical and horizontal directions, and the steel pipe 3 is extrapolated to each pillar 1.

The four steel pipes 3 are provided with scaffolds 4. The scaffold 4 has four working floors 5, 6, 7, and 8 provided horizontally at predetermined intervals in the vertical direction.
You . The work floors 5, 6, 7 up to the third stage are directly fixed to the steel pipe 3 , respectively, and the work floor 8 at the fourth stage is 3
The work floor 7 is suspended from the work floor 7 by a chain 9 so that the work floor 7 can be moved up and down.

As shown in FIG. 2, each of the working floors 5, 6, 7, and 8 is composed of a frame 11 formed by assembling aggregates 10 in a grid and an expanded metal 12 provided on the frame 11. The aggregate 10 protrudes from the frame 11, and the protruding portion is a protruding portion 10 a. As shown in FIG. 1, a guide roller (guide member) 13 is attached to the protruding portions 10a of the work floors 7, 8, and the guide roller 13 is connected to a concrete wall (framework) constructed on the base concrete B. ) The inner surface of K is rolled to guide the raising of the self-raising device of the column type.

The first to third working floors 5,
Spiral stairs 14 are hung on 6 and 7, and 15 ladders are hung on the third and fourth working floors 7 and 8,
The spiral stairs 14 and the ladder 15 allow the worker to work between work floors.

The frame 11 is mounted on the second floor 6.
A mold 17 is fixed to the projecting portion 10a through a fixing bracket 16 substantially vertically. The form 17 is a quadrangular cylindrical member formed so as to abut on the inner surface of the frame K to be constructed, and a square cylindrical metal form 18 abutting on the inner surface of the concrete frame K, And a large number of wide panel beams 19 provided on the back side of the panel 18.

These wide panel beams 19 are ridges extending in the axial direction of the metal foam 18, and are provided at predetermined intervals along the circumferential direction of the metal foam 18. These wide panel beams 19 have lateral ends 20 connecting them in the circumferential direction of the metal foam 18.
A turnbuckle 21 for demolding is attached to each of the four middle portions of the lateral end 20. Then, in the formwork 17 having the above-described structure, the lateral end 20 is pulled and reduced in diameter by rotating the turnbuckle 21, whereby the metal foam 18 is reduced in diameter through the wide panel beams 19 and solidified. The mold is separated from the concrete skeleton K that has been removed.

As shown in FIG. 1, a jack portion 25 is provided on the third working floor 7. This jack part is a hydraulic cylinder (jack main body) 26 installed at the center of the work floor 7 with the piston rod 26a facing downward.
And a load transmitting member 27 detachably attached to the tip of the piston rod 26a.

This load transmitting member 27 is shown in FIGS.
As shown in FIG. 7, a shaft 28 detachably attached to the distal end of the piston rod 26a, and four arms 29 of equal length extending in four directions so as to be gradually separated from the shaft 28 downward. And so on. At the distal ends of these arms 29, there are formed engaging portions 29a each having a substantially C-shaped cross section, and these engaging portions 29a are provided horizontally between the columns 1, 1, and 1 is connected to a connecting brace 30 for connecting and disconnecting.

The hydraulic unit (hydraulic pump, operation panel) of the hydraulic cylinder 26 is mounted (not shown) on the uppermost work floor. It is possible to minimize the number of hydraulic units.

Next, a description will be given of a method of constructing a concrete skeleton using the above-structured column-type scaffolding form lifting device.
Here, in this embodiment, a concrete body K having a large number of hollow chambers in a plane is constructed, but a case in which a concrete wall defining a space is constructed for convenience will be described. The concrete wall defining the space adjacent to the one space and the other space is also constructed in parallel with the concrete wall defining the one space by using the above-mentioned column type scaffolding form lifting device.

(1) First, as shown in FIG. 4, after the base concrete B is cast, the column-type scaffold form lifting device with the form 17 removed is installed on the base concrete B using a crane. I do. At this time, in the column type scaffolding form lifting device, the first column 1 is inserted into the steel pipe 3 so that the tip thereof protrudes from the upper end of the steel pipe 3, and the column 1 is used to make the base concrete through the GC jack 2. B is supported on. The hydraulic cylinder 26 is in a state where the piston rod 26a is contracted, and the piston rod 26a
Is in contact with the bottom surface of the base concrete B.
A base K1 serving as a basis of a concrete wall K to be constructed is formed at a bottom edge of the base concrete B, and a guide roller 13 is in contact with a wall surface of the base K1. Then, after installing the pillar-type scaffolding form lifting device as described above, the reinforcing bar T is mounted on the base K1 using the scaffold 4.
Is assembled.

(2) Next, as shown in FIG. 5, the mold 17 is lifted by a crane, and the lower end of the metal form 18 is set vertically while being in contact with the wall surface of the base K1. The frame 17 is fixed to the second work floor 6 of the scaffold 4 by the fixing bracket 16. Thereafter, the first lot concrete is poured into the formwork 17 to construct the concrete wall K2 on the base K1.

(3) Next, as shown in FIG. 6, the rebar T is assembled on the concrete wall K2 and the joint column 1a is joined to the upper end of the column 1.

(4) Next, after the turnbuckle 21 is rotated to slightly separate the metal foam 18 of the form 17 from the solidified concrete wall K2, as shown in FIG. The piston rod 26a of the hydraulic cylinder 26 is extended. Then, with the extension of the piston rod 26a, the column-type scaffolding frame lifting device rises along the column 1 and the joint column 1a. At this time, the working floors 7 and 8 have rollers 13.
The work floor 8 is lifted up by being suspended by the chains 9 by rolling the wall of the work.

[0025] (5) Thereafter, as shown in FIG. 8, the steel pipe 3
To the hole formed in the peripheral surface of the lower end of the
By inserting a fixing pin 31 as a stopping means, the load of the pillar-type scaffold form lifting device is transmitted to the pillar 1 and the pillar 1
Then, the piston rod 26a is contracted. Next, using the fourth work floor 8 of the scaffold 4, the supports 1, 1 are connected by the connecting brace 30 to secure the rigidity of the supports 1, 1, and then the second lot concrete is placed in the formwork 17. To construct a concrete wall K3 on the concrete wall K2. The connecting brace connects two pairs of columns 1, 1 parallel to the plane of the paper out of the four columns 1,.

(6) Next, as shown in FIG. 9, the rebar T is assembled on the concrete wall K3, and the next joint post 1b is joined to the upper end of the joint post 1a. On the other hand, the shaft 28 of the load transmitting member 27 is attached to the tip of the piston rod 26a, and the arms 29 ...
Are engaged with the connecting braces 30.

[0027] (7) Next, after separated from the concrete wall K3 was solidified by a slight diameter metal form 18 of the mold 17 by rotating the turnbuckle 21, remove the fixing pin 31 post Of steel pipe 3 to 1
The lock is released , and the piston rod 26a of the hydraulic cylinder 26 is extended as shown in FIG. Then, the pillar-type scaffolding form lifting device rises with the extension of the piston rod 26a.

(8) Thereafter, as shown in FIG. 11, in the same manner as described above, by attaching the fixing pin 31, the load of the column type scaffolding form lifting device is transmitted to the joint column 1a and is supported by the column 1a. After the piston rod 26
shrink a. At this time, the load transmitting member 27 is pulled up by the piston rod 26a. Next, using the work floor 8 of the scaffold 4, the columns 1a, 1a are connected by the next connection brace 30 to secure the rigidity of the columns 1a, 1a, and then the third lot concrete is cast into the formwork 17. The concrete wall K4 is constructed on the concrete wall K3.

(9) After constructing the concrete wall K4, the above-mentioned operations (6) to (8) are repeated as many times as necessary to construct the concrete walls K5, 6 ... on the concrete wall K4 sequentially. Then, a concrete wall K having a desired height is constructed on the base concrete B.

(10) After the construction of the concrete wall K is completed, the turnbuckle 21 is rotated to slightly reduce the diameter of the metal foam 18 of the form 17 to separate it from the solidified concrete wall K, as shown in FIG. As shown in (1), the form 17 is pulled up from the column-type scaffold form raising device using a crane and removed.

(11) Next, as shown in FIG. 13, a support 33 projecting inward is fixed to the upper end (top) of the concrete wall K, and the work floor 5 of the scaffold 4 is bolted to the support 33. After supporting the support type scaffolding form lifting device by the support portion 33 by joining with
a, 1b ... are removed from above. This removal work is performed on the connecting brace 3 on the fourth (lowest) working floor 8 of the scaffold 4.
0 while removing it sequentially, and joint support 1
a, 1b... are divided into several parts and lifted by a crane and removed.

(12) Finally, as shown in FIG. 14, the pillar-type scaffold form lifting device itself is lifted up by a crane and removed, whereby a concrete wall (framework) K as shown in FIG. 15 is constructed. . When lifting the pillar-type scaffolding form lifting device by a crane, the work floor 8 is lifted by the chain 9 so as to be as close to the work floor 7 as possible. By doing so, the column-type scaffolding form lifting device is in the most compact state, so that the lifting distance by the crane can be minimized.

According to the above embodiment, the following effects can be obtained. B. Since the scaffold 4 and the formwork 17 are always supported from the bottom surface of the base concrete B by the columns 1, the point of the supporting rigidity of the scaffold 4 and the formwork 17 is lower than the construction work of the skeleton K by the conventional crane. In, it is much higher and is not much affected by the wind. Therefore, work safety is improved, and a crane for raising the formwork 17 and the scaffold 14 is not required, so that the space required for construction work can be minimized. In addition, since the columns 1 are connected to each other by the connecting brace 30 to increase rigidity,
Also in this respect, work safety is improved.

(B) Since the conventional anchor work is unnecessary, the work process is simplified when setting and ascending the formwork 17, so that the efficiency of the construction work is dramatically improved, and Since the formwork does not fall due to detachment, the disaster occurrence rate also drops significantly.

C. When constructing a concrete skeleton K having a large number of hollow chambers in a plane, the required number of pillar-type scaffolding form lifting devices, that is, the number of hollow chambers, is prepared to define each hollow chamber. Concrete walls K can be constructed in parallel by using the respective column-type scaffolding form lifting devices, so that the construction process can be shortened and the cost can be reduced.

(D) In the column-type scaffold form-raising apparatus, the work floor 4 and the formwork 17 are fixed to the steel pipe 3, and the steel pipe 3 is externally slidably moved up and down on the column and fixed as locking means.
Since the system can be detached from the support by the fixed pin 31 , the support-type scaffold form lifting device can be raised to a desired height by joining the supports in order from the bottom to the desired height. Concrete wall K can be easily constructed.

E. In the column type scaffold form lifting device, the hydraulic cylinder 26 is fixed to the work floor 7 of the platform 4, and the distal end of the piston rod 26 a is engaged with and disengaged from the column via the load transmitting member 27 and the connecting brace 30. Because it is freely engaged, the column-type scaffolding frame lifting device can be easily raised along the column only by the expansion and contraction of the piston rod 26a.

F. A load transmitting member 27 is mounted on a shaft 28 which is detachably attached to the distal end of the piston rod 26a.
And four arms 29 extending in four directions so as to gradually separate from each other as going downward from the shaft body 28.
... are engaged with the connecting braces 30, 30 attached to the four columns in parallel and horizontally.
When the support rod type scaffolding form lifting device is raised by extending the piston rod 26a, the reaction force acts on the piston rod 26a from the four columns in a well-balanced manner. It can be raised smoothly.

G. A connecting brace 30 is attached to a supporting column for supporting the column-type scaffolding frame rising device to secure rigidity, and guide rollers 13 attached to the working floors 7 and 8 correspond to the concrete wall K. As the concrete wall K to be built is high, that is, even if the height of the column is high, the column type scaffolding form lifting device can be safely and reliably raised because it supports the lateral force in contact with it. Can be. H. In the column type scaffold form lifting device, the lowermost work floor 8 is suspended by the chain 9, but the guide rollers 13 provided on the work floor 8 contact the inner wall of the concrete wall K. Since the lateral movement of the work floor 8 is restricted, the work floor 8 can be prevented from rolling. In the pillar type scaffold form lifting device, the uppermost work floor 5 is used for rebar assembling work, but work is performed in a state where the formwork 17 is fixed by cutting off the second work floor 6. Since only the floors 5, 6, 7, and 8 can be raised using the hydraulic cylinder 26, the uppermost work floor 5 and the second work floor 6 can also be used as a scaffold for rebar assembly. Thus, the rebar assembling work can be performed without separately setting a dedicated scaffold.

In the above embodiment, a case was described in which the square K-shaped frame K was constructed on the base concrete B. However, the present invention is not limited to this, and the present invention is not limited to this. Of course, it can be applied to the construction of the skeleton.

[0041]

As described above, according to the present invention, the following effects can be obtained. B. Since the scaffold and the formwork are always supported from the bottom of the base concrete by the struts, the work of constructing the concrete skeleton is significantly higher in terms of the rigidity of the support of the scaffold and the formwork than in the case of using a conventional crane. Less affected by wind. Therefore, the safety of the work is improved, and the space required for the construction work can be minimized because the formwork and the crane for raising the scaffold are unnecessary.

(B) Since the conventional anchor work is unnecessary, the work process is simplified when setting and ascending the formwork, so that the efficiency of the construction work is greatly improved, and the formwork due to the detachment of the anchor is improved. There is almost no disaster because there is no fall.

(C) When constructing a concrete body having a large number of hollow chambers in a plane, the required number of pillar-type scaffolding form lifting devices, that is, the number of hollow chambers, are prepared to define each hollow chamber. Since the concrete walls can be constructed in parallel by the respective pillar-type scaffolding form lifting devices, the construction process can be shortened and the cost can be reduced.

[0044] d. In strut scaffold formwork rising device, the system with respect to the column by slidably extrapolation vital locking means to secure the working floor and formwork steel tube up and down the steel to the post
Since it is detachable, the pillar type scaffolding form lifting device can be raised to a desired height by joining the pillars in order from the bottom, so that a concrete wall of a desired height can be easily constructed. Can be.

[0045] In e. Post scaffold formwork Elevators, di
Mount the jack body on the scaffold and support it via the load transmitting member
Guide section that provides more reaction force and is provided on the scaffold
Guide the rise of the scaffold from the constructed skeleton
The scaffold can be easily and stably raised
it can. In addition, even if there are multiple supports, a single jack part
Can stably raise the entire scaffold with the
The overall configuration and control can be simplified.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a pillar type scaffolding form lifting device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a front view showing a jack part.

FIG. 4 is a cross-sectional view showing a state in which a pillar-type scaffold form lifting device is set on a base concrete.

FIG. 5 is a sectional view showing a state where a first lot concrete is being poured.

FIG. 6 is a sectional view showing a state in which the columns are joined.

FIG. 7 is a cross-sectional view showing a state where the pillar-type scaffold form lifting device is raised.

FIG. 8 is a cross-sectional view showing a state where a second lot concrete is being poured.

FIG. 9 is a cross-sectional view showing a state where a load transmitting member is set.

FIG. 10 is a cross-sectional view showing a state where the column-type scaffolding form lifting device is further raised.

FIG. 11 is a sectional view showing a state where a third lot concrete is being poured.

FIG. 12 is a cross-sectional view showing a state in which the mold is removed.

FIG. 13 is a cross-sectional view showing a state where a support is removed.

FIG. 14 is a cross-sectional view showing a state in which the column-type scaffold form lifting device is removed.

FIG. 15 is a sectional view showing a completed concrete skeleton.

[Explanation of symbols]

K, K1, K2, K3 Concrete wall (framework) 1, 1a, 1b Post 3 Steel pipe 4 Scaffold 5, 6, 7, 8 Work floor 13 Guide roller (guide member) 17 Formwork 25 Jack section 26 Hydraulic cylinder (jack body) ) 26a the piston rod 27 load transmitting member 28 shaft 29 arm 30 connecting braces 31 fixed pin (locking means)

Claims (2)

(57) [Claims] 1. A steel pipe provided on a support column in a vertically slidable manner and detachable by a locking means, a scaffold fixed substantially horizontally to the steel pipe, and a formwork fixed substantially vertically to the scaffold. And take the reaction force from the above-mentioned support to raise the above-mentioned scaffold
Jack part to be made
And a guide member provided on the scaffold for guiding by
And the jack portion is a jack mounted on the scaffold.
A jack body, interposed between the jack body and the support
To transmit the reaction force of the jack body to the support
A load transmitting member detachably engaged with the support.
Post scaffold formwork rises apparatus characterized by comprising Te. 2. After the base concrete has been cast, the pillar-type scaffold form lifting device according to claim 1 is slidably mounted on the support erected on the base concrete up and down on the base concrete. Concrete into the formwork
To form a frame, and then connect the next column to the upper end of the column , and then extend the jack body to connect the scaffold and the formwork with the guide member.
A method of constructing a concrete skeleton, comprising: integrally moving along a column while guiding the steel pipe to lock the steel pipe to the column by the locking means, and thereafter repeating the following steps. While degenerating the jack body,
Pour concrete into the formwork to form a frame,
Connect the next support to the upper end of the support, and then
The transmission member is engaged with the column at a position below the steel pipe.
After squeezing, the steel pipe is locked to the column by the locking means.
Unscrew and extend the jack body above
The scaffold and formwork take reaction force from the support via the load transmitting member
Is guided by the skeleton constructed by the above guide member
The steel pipe as described above
It is locked to the column by the locking means.