JPH1171897A - Scaffold support device for placing concrete - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly and efficiently construct a concrete structure. SOLUTION: A scaffold plate support device 30 for placing concrete has a horizontal beam member 31, which is provided at one end with an upper engaging part 32 engaged with upper horizontal locking bars 23 (23a, 23b) and at the other end with a sheath pipe 33 fitted with a handrail pole, and an inclined beam member 37 provided with a lower engaging part 39 engaged with the lower horizontal locking bar 23b is pinned to a moving member 34 freely movably attached to the horizontal beam member 31. The scaffold plate support device 30 is placed outside a form 21 forming a space into which concrete is cast during the construction of a concrete structure, and the moving member 34 is moved for adjustments according to the interval between the upper and lower horizontal locking bars 23a, 23b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a substructure, a pier,
The present invention relates to a concrete scaffold plate support device for supporting a scaffold plate used when constructing a concrete structure formed by driving concrete, such as a wall structure building, an underground wall, a retaining wall, and the like.

[0002]

2. Description of the Related Art Underground structures such as subways, basements, and underpasses are formed by constructing concrete wall structures and foundation structures in which reinforcing bars and steel frames are incorporated. High-rise buildings are similarly constructed by constructing concrete wall structures and foundation structures. Furthermore, retaining walls and piers for retaining cliffs and the like are also made of concrete.

The above-mentioned various concrete structures include a reinforced concrete structure in which a reinforcing bar is arranged inside, and a steel reinforced concrete structure in which reinforcing bars are arranged around a steel frame and integrated with concrete. When constructing such a concrete structure, a rebar construction for constructing a steel frame or a reinforcing bar embedded inside the structure, and a formwork for constructing a form for forming the outer surface of the structure. Construction work and concrete work to drive concrete into the formwork are performed.

[0004] When performing the formwork, a vertical support bar is attached to the base to fix the formwork material, and horizontal fixing bars extending in the horizontal direction are respectively provided outside the vertical support bars in the vertical direction. It will be attached at predetermined intervals.
In concrete work, concrete is driven from above the formwork, so that it is necessary to arrange a scaffold plate outside the formwork material in order to perform the work. In order to support the scaffolding plate, a scaffolding plate supporting device for concrete casting, also called a scaffolding bracket or a formwork bracket, is attached to the outside of the formwork material.

[0005]

Conventionally, an L-shaped scaffold bracket is formed by a horizontal beam member and a vertical support member, and a front end of the horizontal beam member and a lower end of the vertical support member are inclined for reinforcement. They are connected by beam members. At the upper end of the vertical support member, a hook is provided to be engaged with the upper horizontal fixing bar provided outside the formwork member, and at the lower end of the vertical support member, the lower horizontal fixed bar is provided. An engaging metal fitting is provided, and the metal fitting can be vertically fixed at a predetermined pitch by a toggle pin.

However, in such a conventional structure, unless the vertical spacing between a plurality of horizontal fixing rods extending in the horizontal direction outside the form member is set to a high precision, the hooks must be securely inserted. And the metal fittings cannot transmit a desired load to the horizontal fixing bar. Therefore, in the formwork for constructing a concrete structure, the vertical spacing of the horizontal fixing bars, that is, the pitch, must be high precision, and it is difficult to improve the efficiency of the work. there were.

An object of the present invention is to make it possible to construct a concrete structure quickly and efficiently.

The above and other objects and novel features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

[0009]

SUMMARY OF THE INVENTION Among the inventions disclosed in the present application, the outline of a representative one will be briefly described.
It is as follows.

[0010] That is, the scaffold plate support device for concrete casting according to the present invention, when constructing a concrete structure,
For concrete casting, which is arranged on a plurality of horizontal fixing bars extending horizontally in the outside of a form material forming a space into which concrete is poured and fixed at predetermined intervals in a vertical direction, and supporting a scaffold plate. A scaffold plate support device, wherein an upper engaging portion that engages with the upper horizontal fixing bar is provided at one end, and a column support member to which a handrail column is attached is provided at the other end. A horizontal beam member, a movable member movably attached to the horizontal beam member, and fixed to the horizontal beam member at an arbitrary position; and an upper end portion pin-connected to the movable member, and the lower horizontal A lower engaging portion that engages with the fixed bar has an inclined beam member provided at a lower end portion, and a scaffold plate is arranged on the horizontal beam member to work on the scaffold plate. You can build the concrete structure Characterized in that the.

Further, the scaffold plate support device for concrete casting according to the present invention has a clamp member for fastening the horizontal beam member to the upper horizontal fixing bar member to prevent the horizontal beam member from coming off from the horizontal fixing bar member. It is characterized by.

In the present invention, there is a deviation in the vertical distance between the horizontal fixed bar in which the upper engaging portion is engaged and another horizontal fixed bar in which the lower engaging portion is formed. Even if it does, the displacement is absorbed, and the respective engaging portions surely come into close contact with the respective horizontal fixing bars.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a diagram showing an example of an underground structure for constructing a basement.
And a slab floor 13 and a foundation or partition wall 14 which are constructed in a recess 11 formed by excavating the ground, and are constructed along a vertical ground surface of the recess 11. And so on.

FIG. 2 is a view showing a state in which a formwork for constructing any one of the partition walls 14 shown in FIG. 1 is being performed. The state in which the reinforcing bar 20 to be embedded is arranged is shown. The illustrated reinforcing bar 20 has a vertical reinforcing bar 20a extending vertically and a horizontal reinforcing bar 20b extending horizontally.

Corresponding to both side surfaces of the partition wall as a concrete structure, a weir plate or formwork 21 for partitioning a space into which concrete is poured is disposed, and the formwork 21 is located outside the formwork 21. Are supported by a plurality of vertical fixing rod members 22 located at the position indicated by the arrow. A plurality of horizontal fixing bars 23 extending in the horizontal direction and at predetermined intervals in the vertical direction are attached to the outside of the vertical fixing bars 22. As shown in FIG. 2, a plurality of pairs of the horizontal fixed bars 23 are attached according to the height dimension of the formwork member 21, and each pair of the horizontal fixed bars 23 is
The positions in the vertical direction on the outer sides of the left and right form members 21 correspond to each other. In the case shown, the vertical fixed bar 22 and the horizontal fixed bar 23 are each formed by a hollow round pipe. However, each of the bars 22 and 23 may be formed by a hollow square pipe having a square cross section.

In FIG. 2, in order to keep the distance between the left and right form members 21 constant, a pair of horizontal fixing bars 23 whose upper and lower positions correspond to the outside of the form members 21 are passed through the tie bolts. The tie bolts 24 are provided with rib washers 25 at both ends thereof, and the respective rib washers 25 are fastened by nuts 26 which are screwed to the threaded portions of the tie bolts 24.

As shown in FIG. 2, by fixing the form member 21, a space 14 into which concrete is poured is provided.
A mold for partitioning a is formed.
As shown in FIG. 3, a scaffold plate 27 for an operator to drive concrete, that is, to perform a placing operation, is attached to the outside of each of the left and right formwork members 21.

FIG. 4 is a view showing a concrete-casting scaffolding plate support device 30 according to an embodiment of the present invention for supporting the scaffolding plate 27, and FIG. 5 is a view of the formwork shown in FIG. 5 shows a state in which the scaffold plate support device 30 of FIG. 4 is attached to both left and right sides. The scaffold plate support device 30 is also called a formwork bracket or a scaffold bracket, and is shown in FIG.
In the first embodiment, the scaffold plate supporting device 30 is attached to each of the left and right form members 21, but the left form member 2
1 shows a state where the scaffolding plate 27 is attached only to the outer side of the reference numeral 1 and the scaffolding plate 27 is not attached to the right frame member 21 yet.

This scaffolding plate support device 30 has a horizontal beam member 31 formed by a hollow pipe made of hollow metal having a square cross section and has one end connected to a horizontal fixing bar 23. A mating upper engaging portion 32 is provided, and at the other end, a sheath tube 33 to which the handrail support 28 is attached is provided as a support member. The sheath pipe 33 is formed by a metal round pipe having a circular cross section. However, the sheath pipe 33 may be formed of a metal square pipe having a square cross section.
Further, a clamp member may be used instead of the sheath tube 33 as the support member.

A movable member 34 having a square cross section is mounted on the outside of the horizontal beam member 31 so as to be movable in the longitudinal direction along the horizontal beam member 31. The moving member 34 is provided with a screw member 35, and the screw member 35
Loosening can move the moving member 34, and tightening can fix the moving member 34 at that position.

The connecting member 36 is attached to the moving member 34. The upper end of the inclined beam member 37 is connected to the moving member 34 by a pin 38 so that the upper end of the inclined beam member 37 is swingable about the pin. ing. This inclined beam member 37 is formed by a hollow pipe made of hollow metal similarly to the horizontal beam member 31. A lower engaging portion 3 that engages with another horizontal fixed bar 23 located below the horizontal fixed bar 23 with which the upper engaging portion 32 engages is provided at a lower end portion of the inclined beam member 37.
9 are provided. The lower engagement portion 39 is formed by bending a metal plate material into a U-shape. The horizontal beam member 31 and the inclined beam member 37 may be formed by a hollow round pipe having a circular cross section.

The scaffold plate support device 30 having such a structure is as follows.
As shown in FIG. 3, a plurality of horizontal fixing bars 23 having the same height are attached at predetermined intervals corresponding to the length of the scaffolding plate 27, and a plurality of them are arranged outside the left and right formwork members 21. Will be. When engaging each scaffold plate support device 30 with each of the upper and lower horizontal fixed bars 23, even if an error or deviation occurs in the distance between the respective horizontal fixed bars 23, As shown in FIG. 6, by setting the position of the moving member 34 to an arbitrary position such as a position indicated by a solid line or a position indicated by a two-dot chain line, the horizontal beam member 31 can be set to a predetermined level. it can. Moreover,
Each of the engaging portions 32 and 39 surely comes into contact with the horizontal fixed bar 23 without any gap, so that the load of the scaffolding plate support device 30 is distributed to the two horizontal fixed bars. Is transmitted.

The upper engaging portion 32 is formed by two clamp members 32a and 32b fixed to both side surfaces of the horizontal beam member 31, as shown in FIG.

FIG. 7 is an enlarged view showing a part of one clamp member 32a forming the upper engaging portion 32. The clamp member 32a is a concave portion 41 into which the horizontal fixing bar 23 enters.
The clamp member 32a is movably attached with a clamp piece 42 for preventing the upper engaging portion 32 from coming off the horizontal fixing bar 23 that has entered the recess 41. In this manner, by providing the upper engaging portion 32 with a clamping function, it is possible to reliably prevent the scaffold plate support device 30 from being accidentally detached from the horizontal fixing member 23 due to vibration or the like.

The clamp member 32a has two support pins 4
3 and 44 are fixed, and cam grooves 45 and 46 with which the support pins 43 and 44 are engaged are formed in the clamp piece 42. When the clamp piece 42 is set to the clamp position shown by the solid line in FIG. 7, the clamp piece 42 makes the entrance 41 a narrower than the outer diameter of the horizontal fixed bar 23 in the concave portion 41, and the upper engaging portion 32 becomes the horizontal fixed bar 23. Is prevented from coming off. On the other hand, when the clamp piece 42 is set at the position shown by the two-dot chain line, the width of the entrance 41a is increased,
The upper engaging portion 32 can be removed from the horizontal fixing bar 23. Each support pin 43, 44 has a head larger than the width of each cam groove 45, 46, and the clamp piece 4
2 does not come off from the clamp member 32a. The other clamp members 32b have the same structure. Further, as the lower engaging portion 39, the upper engaging portion 3
The structure may be the same as that of FIG.

Next, a procedure for attaching the scaffold plate 27 to the outside of the form member 21 using the above-described scaffold plate support device will be described.

In order to construct a concrete structure under the condition that the rebar work of the concrete structure has been completed,
Formwork material 21 forming a space into which concrete is driven
Attach. As shown in FIG. 2, when the concrete structure is the partition wall or the foundation 14 shown in FIG. 1, the form members 21 are attached to both sides thereof. The formwork 21 has a predetermined height and width, a plurality of the formwork are arranged in a predetermined posture such as a straight line, and each formwork 21 is composed of a plurality of vertical fixing rods 22 and a plurality of horizontal It is fixed by the fixing bar 23. The form members 21 facing each other are held at predetermined intervals by a plurality of tie bolts 24.

The spacing or pitch between the vertical fixing bars 22, the spacing between the horizontal fixing bars 23 and the tie bolts 24
Is set according to conditions such as the thickness of the concrete structure. After the form member 21 is installed in this way, as shown in FIG. 3, the scaffold plate supporting devices 30 shown in FIG. More than one.

At the time of installation, the screw member 35 is loosened so that the moving member 34 can move along the horizontal beam member 31 so that the upper engaging portion 32 is fixed to the predetermined horizontal fixing bar 2.
3 and the lower engaging portions 39 are respectively engaged with the horizontal fixed bar 23 located below the horizontal fixed bar 23. When the upper engaging portion 32 is engaged with the upper horizontal fixing bar 23, the clamp piece 42 is shifted to a position shown by a two-dot chain line as shown in FIG. The upper engaging portion 32 is shifted to the position and
So that it does not come off.

In FIG. 6, reference numeral 23a denotes the upper engaging portion 3.
2 denotes an upper horizontal fixed bar to be engaged, and reference numeral 23b
Denotes a lower horizontal fixing bar to which the lower engaging portion 39 is engaged, and the vertical interval between them is indicated by a symbol L. Each of the horizontal fixing bars 23 is attached so that the interval L is constant. However, attaching the interval L with high accuracy lowers the workability, and in consideration of the workability, It will have some error.

Therefore, considering the workability of mounting the horizontal fixing bar 23, it is inevitable that an error occurs in the interval L. However, in the scaffold plate supporting device of the present invention, the upper horizontal fixing bar Even if there is an error in the interval L between the lower fixing member 23a and the lower horizontal fixing bar 23b, the upper engaging portion 32 and the lower engaging portion 39 are moved by moving the moving member 34 along the horizontal beam member 31. And the vertical spacing between them can be adjusted steplessly. Thereby, when the horizontal beam member 31 is swung about the upper engaging portion 32 so that the horizontal beam member 31 has a predetermined horizontality in a state where the upper engaging portion 32 and the lower engaging portion 39 are engaged, Since the moving member 34 moves along the horizontal beam member 31, even if there is an error in the distance between the upper and lower horizontal fixing bars, the horizontal beam member 31 can be easily set to a predetermined level. Can be. When the horizontality reaches a predetermined level, the moving member 34 is fastened and fixed to the horizontal beam member 31 by tightening the screw member 35.

According to such a procedure, as shown in FIG. 3, a predetermined number of scaffolding plate support devices 30 are attached to the outside of the formwork member 21, and then the scaffolding plate 27 is disposed thereon. The support rail 28 is attached to the pipe 33. The handrail post 28 is fixed to the sheath tube 33 by fastening a screw member 33a. As shown in FIG. 3, a handrail 29 is attached to the handrail post 28 to ensure the safety of the worker. You.

FIG. 5 shows a state in which the scaffolding plate 27 is arranged in this manner. The worker rides on the scaffolding plate 27 and the space 1 defined by the formwork 21 is formed.
Concrete is poured into 4a, that is, a concrete placing operation is performed.

After the concrete pouring operation is completed, another form material (not shown) is stacked on each form material 21 shown in FIG. 5, and a plurality of horizontal fixing bars are formed. Attached to the outside of the
A scaffold support device is attached at a predetermined height,
A similar concrete drive is performed. In this way, a concrete structure having a predetermined height is constructed.

FIG. 8 is a view showing a scaffold plate support device 30 according to another embodiment of the present invention.
The same reference numerals are given to members common to the members constituting the scaffold plate support device 30 shown in FIG.

In the scaffold plate support device 30 shown in FIG. 8, the structure of the upper engaging portion 32 is different from that described above.
Other structures are the same. Upper engaging portion 3 in this case
2 has an engagement piece 47 obtained by bending a metal plate material into a U-shaped cross section, and in order to prevent the engagement piece 47 from coming off from the horizontal fixing bar 23 that has entered the engagement piece 47. The clamp pin 48 is detachably fitted to the engagement piece 47. The clamp pin 48 is connected to the horizontal beam member 31 by a chain or a wire 49.

FIG. 9 is a view showing another specific example of the upper engaging portion 32. The upper engaging portion 32 includes a first engaging arm 51 fixed to one end of the horizontal beam member 31, A second engagement arm 52 connected to be openable and closable by a pin 53
A clamp bolt 55 is provided at the tip of the first engagement arm 51 so as to be swingable about the pin 54. A clamp bolt 5 is provided at the tip of the second engagement arm 52.
5 is formed, and both arms 5
The upper engaging portion 32 is clamped to the horizontal fixed bar 23 by inserting the clamp bolt 55 into the groove 56 and tightening the nut 57 with the horizontal fixed bar 23 inserted into the first and second 52. be able to. The attachment of the first engagement arm 51 to the horizontal beam member 31 may be such that the first engagement arm 51 is below the second engagement arm 52 as shown in the drawing. Joint arm 5
1 may be on the upper side.

In the scaffolding plate support device having the upper engaging portion 32 of the type shown in FIGS. 8 and 9, the attachment of the scaffolding plate is performed in the same procedure as described above. The upper engaging portion 32 having the structure shown in FIG. 8 can be used as the lower engaging portion 39 shown in FIG. 4, and the upper engaging portion of the type shown in FIG. It may be used or as a support member.

FIG. 10 is a view showing a conventional scaffold plate support device as a comparative example. This scaffold plate support device includes a scaffold bracket 63 formed in an L shape by a horizontal beam member 61 and a vertical support member 62. The front end side of the horizontal beam member 61 and the lower end side of the vertical support member 62 are inclined beam members 64 for reinforcement.
Are connected by A hook 65 is provided at an upper end of the vertical support member 62 to be engaged with an upper horizontal fixing bar provided outside the form member. A lower horizontal fixing bar is provided at a lower end of the vertical support member 62. A metal fitting 66 is provided for engaging with the material. The metal fitting 66 is moved up and down along the vertical support member 62 so as to be fixed by the toggle pin 67 at a predetermined pitch.

In the structure shown in FIG.
Since the vertical distance between the metal member and the receiving member 66 can be changed only at a predetermined pitch, the vertical distance between the horizontal fixing bars must be set to a high precision. In this case, a gap is generated between the metal fitting 66 and the horizontal fixing bar. Therefore, most of the load of the scaffold plate support device is received by the upper horizontal fixing bar. Moreover, in order to change the vertical position of the metal fitting 66 at a predetermined pitch, the toggle pin 67 is required.
The workability is not good.

On the other hand, the scaffold support device 3 of the present invention
In the case of 0, by loosening the screw member 35 and swinging the horizontal beam member 31 about the upper engagement portion 32, the error between the horizontal fixing bars on the upper and lower sides can be absorbed. Each scaffolding board support device 30 from scaffolding board 27
Can be reliably dispersed and transmitted to the respective horizontal fixed bar members 23 via the upper engaging portion 32 and the lower engaging portion 39. Therefore, it is possible to prevent deformation of the horizontal fixing bar and to use a member having a small diameter. Further, in the case of the formwork, it is not necessary to make the vertical spacing, that is, the pitch, of the horizontal fixed rods high precision, so that the work efficiency of the work can be improved.

The formwork shown in FIG. 2 shows a case where the partition wall portion 14 is constructed in the underground structure shown in FIG. 1. This is an example of the formwork and is shown in FIG. The scaffold plate supporting device 3 of the present invention is also used when constructing the yard side wall portion 12.
0 can be used. In that case, since the outside of the premises side wall portion 12 faces the ground surface, the scaffolding plate is not disposed outside the premises side wall portion 12 but corresponds to the inside surface of the premises side wall portion 12. Formwork material 2 to be attached
In order to place the scaffolding plate 27 outside the one, a scaffolding plate support device 30 will be attached. In this case, unlike the tie bolt 24 shown in FIG. 2, a tie bolt having a base end fixed to a form material arranged on the ground surface side and having a threaded portion only at the tip is used. You.

Although the invention made by the inventor has been specifically described based on the embodiment, the invention is not limited to the above-described embodiment and can be variously modified without departing from the gist of the invention. Needless to say, there is.

For example, although FIG. 1 shows an underground building, a form material such as a wall used for building a middle-rise building or a high-rise building such as an apartment built on the ground is also used. If the concrete structure is formed by forming a predetermined space and driving concrete into the space, the scaffold plate support device of the present invention is used when constructing various structures such as piers and retaining walls. can do. Further, in the case of illustration, the upper engaging portion 32 has a function of clamping, but only the lower engaging portion 39 or both the engaging portions 32 and 39 have a function of clamping. You may do it.

[0046]

Advantageous effects obtained by typical ones of the inventions disclosed in the present application will be briefly described.
It is as follows.

(1) Even if there is an error in the vertical spacing between the horizontal fixing bars attached to the outside of the form material, the error is easily absorbed and the upper engaging portion and the lower engaging member are connected. The joint portion can be securely brought into close contact with the horizontal fixing bar.

(2) Since the error in the vertical spacing between the horizontal fixing bars can be increased, the mounting can be quickly performed without high precision, and the construction of the concrete structure can be performed. It can be done quickly and efficiently.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an underground structure as an example of a concrete structure.

FIG. 2 is a cross-sectional view showing a state where a form member is attached to construct a concrete structure.

FIG. 3 is a perspective view showing a state in which the scaffold plate support device of the present invention is attached to the outside of the form member shown in FIG. 2;

FIG. 4A is a perspective view showing a scaffold plate support device according to an embodiment of the present invention, and FIG. 4B is a cross-sectional view taken along line 4B-4B in FIG.

FIG. 5 is a cross-sectional view showing a state in which the scaffold plate support device is attached to the outside of the form material.

FIG. 6 is a front view of FIG. 4;

FIG. 7 is an enlarged front view showing a clamp member of an upper engagement portion shown in FIG.

FIG. 8 is a perspective view showing a scaffold plate support device according to another embodiment of the present invention.

FIG. 9 is a perspective view showing another specific example of the upper engaging portion.

FIG. 10 is a front view showing a conventional scaffold plate support device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Ground surface 12 Premise side wall part 14 Partition wall part 14a Space 20 Reinforcing bar 21 Form member 22 Vertical fixing bar 23 Horizontal fixing bar 24 Tie bolt 25 Rib washer 27 Scaffolding plate 28 Handrail support 29 Handrail 31 Horizontal beam member 32 Upper engaging portion 32a Clamp member 33 Shear tube 34 Moving member 35 Screw member 37 Inclined beam member 38 Pin 39 Lower engaging portion 42 Clamp piece 43 Support pin

Claims (2)

[Claims] When a concrete structure is constructed, a plurality of horizontal fixing bars extending horizontally in the outside of a form member forming a space into which concrete is poured and fixed at predetermined intervals in a vertical direction. A scaffolding plate support device for placing concrete, which supports the scaffolding plate, wherein an upper engaging portion for engaging the upper horizontal fixing bar is provided at one end, and a handrail support is provided. A horizontal beam member provided with a supporting column support member provided at the other end, a movable member movably attached to the horizontal beam member, and fixed to the horizontal beam member at an arbitrary position; An inclined beam member having a lower engaging portion provided at a lower end portion, the lower engaging portion being pin-coupled to the moving member and engaging with the lower horizontal fixing bar member, and a scaffold plate on the horizontal beam member Place and work on the scaffold Concrete 設用 scaffolding board supporting device, characterized in that the adapted to construct the concrete structure by Rukoto. 2. The scaffold plate support device for concrete casting according to claim 1, wherein the upper engaging portion fastens the horizontal beam member to the upper horizontal fixing bar member and starts from the horizontal fixing bar member. A scaffolding plate support device for concrete placing, comprising a clamp member for preventing detachment.