JPH1162228A - Shaft coupling for supporting form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To couple a shaft supporting a concrete form simply with reinforcing bars. SOLUTION: A coupling tool is composed of a frame 5, screw mechanism 9, and a wedge 10. A socket 7 to support a shaft 4 and reinforcing bars 2 and a screw receptacle 6 to support a bolt 15 of the screw mechanism 9 are furnished on the frame 5 in such a way as opposing over and under. At the bottom of the bolt 15 a wedge 10 is coupled in such a way as capable of relative rotation. After the shaft 4 and reinforcing bars 2 are adjoiningly installed in the socket part 7, the bolt 15 is driven and the wedge 10 is intruded forcibly between the shaft 4 and reinforcing bars 2, and they 4 and 2 are simultaneously pinched by the wedge 10 and socket 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft connecting member for supporting a formwork for concrete casting, and more particularly to a window opening or the like which is difficult to support the formwork with a separator or a frame support post. The present invention relates to a shaft connector for supporting a form to be formed from a wall inner surface side using a reinforcing bar.

[0002]

2. Description of the Related Art A concrete casting formwork uses a formwork holder such as a separator or a frame support post for a temporary structure assembled along a wall surface or a floor surface to be formed. Even when a wall opening such as a window is fixedly supported so as not to be displaced and moved, it is necessary to fix and support each of the upper and lower mold forms and the left and right form forms so as not to be displaced and moved. However, in many cases, since the thickness of the concrete wall is only about 5 to 20 cm, for example, when the upper and lower molds are supported by the frame support posts, the left and right molds are similarly stretched by the frame support posts. They cannot be supported because there is no room (wall thickness) for the frame support posts to be arranged vertically and horizontally.

[0003] Even in the above situation, the left and right forms of the windows adjacent to each other with the concrete wall interposed therebetween can be fixed and supported by the separator. However, since the mold located at the outermost end has no fastening partner, the separator cannot be applied. In such a case, the shaft of the separator is welded to the reinforcing bar facing the window at the side end,
A construction mode in which a panel for a formwork is fixed to the welded separator is adopted.

[0004]

In the current building construction work, division of labor is carried out for each work process. For example, construction of a formwork and assembling work of reinforcing bars are performed by specialized workers. Therefore, when the reinforcing bar is used as a supporting member as described above and the shaft portion of the separator is welded to the supporting member, it is necessary to obtain the help of a worker who specializes in assembling the reinforcing bar or a worker who specializes in welding. The work is interrupted and the construction of the formwork cannot be performed efficiently. Contrary to the intention of a worker specializing in formwork construction, the separator may be randomly welded, and the post-correction may take extra time.

An object of the present invention is to provide a shaft connecting tool for firmly connecting a shaft supporting a formwork to a reinforcing bar. An object of the present invention is that a shaft supporting a formwork can be connected and fixed to a reinforcing bar by a worker himself who specializes in formwork construction, and therefore does not require the help of a worker having a different function.
An object of the present invention is to provide a shaft connecting device capable of efficiently and accurately constructing a mold. Another object of the present invention is to reduce the cost of the shaft connector by simplifying the structure of the shaft connector left in the concrete wall together with the reinforcing bar as a consumable, and reducing the cost required for its manufacture. It is in.

[0006]

The shaft connecting member of the present invention is used for fixing one end of a shaft 4 for fixing and supporting a mold 1 to a reinforcing bar 2. The shaft connector is supported by the frame 5 having the socket portion 7 and the screw receiving portion 6 opposed to each other at a predetermined interval, and is screwed toward the socket portion 7 by being supported by the screw receiving portion 6. And a wedge body 10 attached to an end of the screw mechanism 9 on the socket 7 side. Therefore, the shaft body 4 supported in parallel by the socket part 7
The wedge body 10 is forcibly advanced by the screw mechanism 9 between the shaft body 4 and the reinforcing bar 2 so that the shaft body 4 and the reinforcing bar 2 are clamped and immovable relative to each other.

After the shaft 4 and the reinforcing bar 2 are arranged adjacent to and parallel to the socket portion 7, the wedge body 10 is forcibly inserted between the shaft 4 and the reinforcing bar 2 by screwing in the screw mechanism 9. The rebars 2 are each strongly pressed against the socket portion 7 by receiving a lateral component force. As a result, the shaft body 4 and the rebar 2 are fixed immovably. As the shaft body 4, a screw bar of an existing separator can be used, but a dedicated part having a screw shaft for screwing the cone 23 at one end may be used. After the shaft body 4 is fixed to the reinforcing bar 2, a cone 23 is screwed into the protruding end, and the form 1 is fastened and fixed to the cone 23 according to a conventional method. Since the shaft body connecting tool can be handled by the worker who constructs the formwork, the mounting position and posture of the shaft body 4 or the protrusion dimensions of the shaft body 4 can be freely adjusted and changed, which is suitable for formwork construction. Can be arranged.

[0008] Specifically, the socket portion 7 includes the wedge body 1.
The base body 11 is formed of a pair of base walls 11 opposed to the base wall 0 and a pair of side walls 12 provided on the left and right sides of the base wall 11 to restrict lateral movement of the shaft body 4 and the rebar 2. The screw mechanism 9 includes a screw hole 14 provided in the screw receiving portion 6 and a bolt 15 screwed into the screw hole 14. The protruding end of the bolt 15 is connected to the wedge body 10 so as to be relatively rotatable. Wedge body 1
The reason why the bolt 0 and the bolt 15 are relatively rotatably connected is to prevent the wedge body 10 from rotating together with the bolt 15 when the screw mechanism 9 is screwed into the socket 7 side.

The frame 5 may be formed of a cylindrical body having a polygonal cross section, a screw receiving portion 6 may be formed on one of the opposed cylindrical walls, and a socket portion 7 may be formed on the other. When the frame 5 is formed in an endless frame shape by, for example, a cylindrical body having a rectangular cross section, the wedge 1
When the shaft 4 and the rebar 2 are clamped and fixed at 0, the horizontal component acting on the socket 7 is applied to the entire frame 5, and an excessive tightening force is applied to the shaft 4 and the rebar 2. In this case, it is possible to prevent the socket portion 7 from being deformed in an expanded state. Deformation of the screw receiving portion 6 due to the screwing reaction force of the screw mechanism 9 can also be prevented.

A non-slip projection 33 may be formed on each of the contact surfaces 17 of the wedge body 10 with the shaft 4 and the reinforcing bar 2. If the anti-slip projections 33 are provided on the contact surface 17 of the wedge body 10, the contact pressure between the shaft body 4 and the reinforcing bar 2 and the wedge body 10 can be increased, and the fixing strength can be increased. That is, the shift movement of the shaft body 4 in the axial direction can be prevented well. When the reinforcing bar 2 is a deformed reinforcing bar, the projection 33 is engaged with the bar on the surface of the reinforcing bar, and the wedge body 10 can be prevented from shifting in the axial direction.

A pair of side walls 12 forming the socket portion 7;
12 may be inclined toward the opposite side wall 12. According to such a socket part 7, the shaft body 4 or the reinforcing bar 2 is prevented from moving away from the base wall 11 along the surface wall of the side wall 12, and the shaft body 4 and the reinforcing bar 2 are always fixed at a fixed position. it can.

The screw receiving portion 6 may be provided continuously on one side wall 12, and the regulating wall 31 intersecting with the screw shaft 15a may be provided continuously on the other side wall 12. The passage 32 provided in the regulating wall 31 is connected to the screw shaft 15 between the screw receiving portion 6 and the wedge body 10.
a. Thus, the opening 3 provided in the regulating wall 31
2 is externally fitted to the screw shaft 15a.
1 and 2 can be restrained to each other via the screw mechanism 9, so that an excessive tightening force is applied to the shaft body 4 and the rebar 2 in the same manner as when the frame 5 is formed of a cylindrical body. 7 can be prevented from being expanded.

A relief hole 25 may be provided in the base wall 11 of the socket portion 7 facing the wedge body 10 to avoid interference between the wedge body 10 and the base wall 11. Shaft 4 and reinforcing bar 2
Even if the diameter or thickness of the socket portion 7 changes greatly, it can cope with the diameter change to some extent within the range of the left and right widths of the socket portion 7. However, when the tip of the wedge body 10 comes into contact with the socket portion 7, it becomes impossible to further tighten the wedge body 10. In order to avoid such a situation and to expand the range of responding to a diameter change, a relief hole 25
Through.

[0014]

【Example】

(First Embodiment) FIGS. 1 to 4 show a first embodiment of a shaft connecting member according to the present invention. In FIG. 2, reference numeral 1 denotes a mold for forming a window. The pair of upper and lower mold frames 1, 1 of the mold frame 1 is supported and fixed by a plurality of frame support posts 3 in a stretchable manner. The formwork 1 at the window side end is fixed with several shafts 4 fixed to the reinforcing bar 2 via a shaft coupling.

In FIG. 1, the shaft connecting member is supported by a frame 5 made of a press-formed metal fitting having a screw receiving portion 6 and a socket portion 7 integrally formed at upper and lower ends, and a screw receiving portion 6. And a wedge body 10 connected to the lower end of the screw mechanism 9. Frame 5 front and rear dimensions are 5-10c
m.

The socket portion 7 is formed into a tub body by a base wall 11 facing the wedge body 10 and a pair of side walls 12 and 12 bent upward from both left and right ends of the base wall 11. In addition, each of the side walls 12, 12 is inclined toward the side of the opposing side wall, and is formed in an upwardly tapered shape. A relief hole 25 is provided in the center of the base wall 11 to prevent interference with the wedge body 10. Side walls 12, 12
Are formed to be larger than the sum of the outer diameters of the shaft 4 and the reinforcing bar 2. Also, both side walls 1
The vertical dimensions of 2, 2 are set larger than the diameter dimensions of the shaft body 4 and the reinforcing bar 2.

A vertical leg wall 13 projects from the upper end of the right side wall 12 of the above side walls 12, and the screw receiving portion 6 is formed by bending the screw receiving portion 6 laterally from the upper end of the leg wall 13. ,
The screw receiving portion 6 is vertically opposed to the socket portion 7. A screw hole 14 is formed in the center of the plate surface of the screw receiving portion 6. The screw mechanism 9 is constituted by the screw hole 14 and the bolt 15 screwed into the screw hole 14. The bolt 15 is a commercially available product and has a hexagonal operation head 16 at the upper end.

The wedge body 10 is formed of a steel block having a pair of contact surfaces 17 in the form of a tapered tapered shape, and is connected to the bolt 15 so as to be relatively rotatable. More specifically, a through hole 18 is formed at the front and rear center near the upper end of the wedge body 10, and a connection hole 19 is provided between the upper end surface of the wedge body 10 and the through hole 18. At the lower end of the bolt 15, a shaft portion 20 having a smaller diameter than the screw portion is provided, and after the shaft portion 20 is inserted into the connection hole 19, the retaining ring 21 is attached to the shaft portion 20 protruding into the through hole 18.
Is attached, and the bolt 15 and the wedge body 10 are inseparably connected.

The shaft body 4 is made of a steel rod having a screw shaft 4a formed at one end, and a cone 23 of a separator can be screwed and connected to the screw shaft 4a. A fastening screw 24 that penetrates the mold 1 in the thickness direction is incorporated in the cone 23.

Next, how to use the shaft connecting member will be described. First, the bolt 15 is loosened and the wedge body 10 is separated from the socket part 7 to some extent. In this state, the end of the reinforcing bar 2 is inserted into the socket 7, and the shaft 4 is inserted into the socket 7. In this state, the bolt 15 is screwed into the socket 7 to force the wedge 10 to enter between the shaft 4 and the reinforcing bar 2. Wedge body 10 is shaft 4 and reinforcing bar 2
The shaft body 4 and the reinforcing bar 2
Each of them is pushed by the contact surface 17 and moves to the side away from each other, and as shown in FIG.
It is received by 2,12. When the bolt 15 is further screwed in so that it cannot be further tightened, the shaft body 4 and the reinforcing bar 2 are fixed by the wedge body 10 and the socket portion 7 so as to be relatively immovable. At this time,
Since the side walls 12 and 12 are inclined upwardly and convergently, the shaft 4 and the reinforcing bars 2 are tightened by the wedge body 10.
Can be prevented from slipping along the side wall 12, and the shaft body 4 and the reinforcing bar 2 can be always fixed at a fixed position of the socket portion 7.

After fixing several shafts 4 to the rebar 2 as described above, the cone 23 is screwed into the screw shaft 4a of the shaft 4 to define the receiving surface of the mold 1. After this, formwork 1
Is applied to the cone 23 so that a fastening screw 24 protruding from the cone 23 projects from the inner surface of the mold 1. Thereafter, the mold fastening device 26 is screwed into the fastening screw 24, the metal frame material 27 is arranged on the upper and lower sides and / or the left and right sides thereof, and the wedge 28 is driven into the mold fastening device 26 to cooperate with the mold 1. 23 and metal frame material 2
7 and fix it. The metal frame material 27 is fixed to a temporary structure assembled along the wall surface.

After the concrete poured into the mold 1 is solidified, the wedge 28 is removed, the mold fastener 26 and the metal frame 27 are removed, and the mold 1 is removed. Further, the cone 23 is removed, and mortar is filled in the removal mark. The shaft connector is left in the concrete wall together with the rebar.

When the diameter of the shaft 4 or the reinforcing bar 2 is small, the space between the two 4 is widened, and the amount of the wedge 10 entering the socket 7 is increased accordingly. In such a case as well, since the escape hole 25 is provided in the base wall 11, the wedge body 10 can fasten and fix the shaft body 4 and the reinforcing bar 2 without contacting the base wall 11 and contacting. It is possible to widely cope with a change in the diameter of the shaft body 4 and the reinforcing bar 2.

(Second Embodiment) FIG. 5 shows a second embodiment of a shaft connecting device in which the structure of the frame 5 is changed. In this case, the frame 5 is formed by a vertically long tubular body having a rectangular cross section, a hole for inserting a bolt is provided in the upper wall thereof, and a welding nut 30 is welded to the upper surface side of the hole. Part 6. Further, the lower half of the frame 5 was used as a socket 7.

When the frame 5 is formed in the shape of an endless frame, the expanding force acting on the left and right side walls 12, 12 of the socket portion 7 is applied to the entire frame 5, and the side walls 1 are formed.
Outer deformation of 2, 12 can be prevented well. Bolt 1
5, the screw receiving portion 6 is turned into the socket portion 7 by the tightening reaction force.
It can also be prevented from deforming away from the direction. If a long tube is prepared as a material for forming the frame 5,
The frame 5 can be manufactured at a low cost simply by cutting the pipe material to a predetermined size and performing a hole forming operation or a welding operation on the welding nut 30. Since the structure other than the above is the same as that described in the first embodiment, the same members are denoted by the same reference numerals and description thereof will be omitted. In the following examples,
The description of the same content will be omitted, and the same members will be denoted by the same reference numerals.

(Third Embodiment) FIG. 6 shows a third embodiment in which the structure of the frame 5 in the first embodiment is partially changed. In this case, an inverted L-shaped regulating wall 31 is provided continuously at the upper end of the left side wall 12 of the socket portion 7, and the screw shaft 1 of the bolt 15 is provided.
A passage 32 is provided in a horizontal wall intersecting with the passage 5a.
Is different from the first embodiment in that the screw shaft 15a is inserted through the screw shaft 15a. The opening 32 is provided between the screw receiving portion 6 and the wedge body 10 so that the screw shaft 15
a. When the regulating wall 31 is provided in this manner, the regulating wall 31 and the screw receiving portion 6 can be restrained to each other via the bolt 15, so that the wedge is formed in the same manner as when the frame 5 is formed of a cylindrical body. Both side walls 1 by the tightening force of body 10
2, 12 can be prevented from being expanded and deformed.

FIG. 7 shows an example in which the wedge body 10 is changed.
The difference from the previous embodiments is that a non-slip projection 33 is provided on each of the contact surfaces 17 of the wedge body 10. More specifically, a knurling process is performed on each of the contact surfaces 17 to form a group of projections 33 in a continuous mountain shape. The projections 33 can be formed in a lattice shape or an oblique lattice shape, in addition to the continuous mountain shape. A thermal spray coating of copper, zinc, or the like may be formed on the contact surface 17 so that the projections 33 may be formed in a rough surface. When the projections 33 for preventing slippage are provided in this way, the projections 33 can be brought into close contact with or bite into the surfaces of the shaft body 4 and the reinforcing bar 2, thereby increasing the fixing strength. In the case where the reinforcing bar 2 is a deformed reinforcing bar, the projection 33 is engaged with the bar on the surface of the reinforcing bar, so that the wedge body 10 can be prevented from shifting in the axial direction.

(Fourth Embodiment) FIG. 8 shows a fourth embodiment in which the screw mechanism 9 is changed. Here, the screw mechanism 9 is constituted by the bolt 15 rotatably supported by the screw receiving portion 6 and the female screw cylinder 34 screwed into a lower portion of the bolt 15. The bolt 15 is assembled with a retaining ring 35 disposed on the lower surface side of the screw receiving portion 6 so as not to be pulled out. In this case, the bolt 15 and the female screw cylinder 34
The wedge body 10 only needs to be fixed to the lower end of the female screw cylinder 34 with a screw or a pin, since the rotation of the wedge body 10 is relatively large. Instead of the bolt 15, a nut may be supported on the screw receiving portion 6 so as to be rotatable only, and a screw shaft may be screwed into the nut to form the screw mechanism 9.

In addition to the above, the frame 5 may be formed by forming the socket 7 and other parts as separate parts and welding the other parts to the socket 7. The wedge body 10 can be formed of a plastic molded product in addition to the metal block. As the shaft 4, a screw bar of a separator can be used as it is. The socket part 7 can be formed in an L-shaped cross section.

[0030]

According to the shaft pair connecting tool of the present invention, the wedge body 10 and the socket part, which are moved and operated by the screw mechanism 9, can be used.
Since the shaft 4 and the reinforcing bar 2 can be simultaneously clamped and fixed and the shaft 4 can be connected to the reinforcing bar 2, the worker who constructs the formwork can mount the shaft 4 itself, and the worker with different functions The construction of the formwork can be performed efficiently and accurately without the need for the help of the operator, and the labor and time required for the construction can be reduced accordingly. Since the shaft-to-connector is composed of the frame 5, the screw mechanism 9, and the wedge body 10, the cost required for manufacturing the shaft-to-connector can be reduced, so that the consumption cost of the shaft-to-connector can be reduced. Material costs required for frame construction can be reduced.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view of a shaft-to-connector according to a first embodiment.

FIG. 2 is a use state diagram showing an application example of the shaft pair connecting tool according to the first embodiment.

FIG. 3 is a perspective view of the shaft-pair connecting tool according to the first embodiment.

FIG. 4 is a vertical sectional side view showing a relational structure between the shaft pair connecting tool and the formwork according to the first embodiment.

FIG. 5 is a front view of a shaft pair connecting tool according to a second embodiment.

FIG. 6 is a partially broken front view of a shaft-to-connector according to a third embodiment.

FIG. 7 is a perspective view showing a modified example of a wedge body.

FIG. 8 is a front view showing a fourth embodiment in which a screw mechanism is changed.

[Explanation of symbols]

1 ... formwork, 2 ... rebar, 4 ... shaft, 5 ...
Frame, 6 Screw receiving part, 7 Socket part, 9
...... Screw mechanism, 10 ... Wedge body, 11 ... Base
Wall, 12 ... side wall, 14 ... screw hole, 15 ...
Bolt, 15a Screw shaft, 17 Contact surface, 25
…… Escape hole, 31 …… Regulatory wall, 32 ……… Entrance, 3
3. Projection.

Claims (7)

[Claims] 1. A shaft connecting member for fixing one end of a shaft member 4 for fixing and supporting a formwork 1 to a reinforcing bar 2, wherein the shaft member connecting member is connected to a socket portion 7 and a screw receiving member at a predetermined interval. A frame 5 having a portion 6 opposed thereto; a screw mechanism 9 supported by the screw receiving portion 6 and screwed toward the socket portion 7; and an end of the screw mechanism 9 on the socket portion 7 side. The wedge body 10 is forcibly advanced by a screw mechanism 9 between the shaft body 4 supported in parallel by the socket portion 7 and the reinforcing bar 2, and the shaft body 4 and the reinforcing bar are provided. 2. A shaft connecting member for supporting a formwork, wherein the shaft member is held and fixed so as to be relatively immovable. 2. A base wall 11 facing the wedge body 10 is provided on both left and right sides of the base wall 11.
A pair of side walls 1 for restricting lateral movement of the shaft 4 and the reinforcing bar 2
The screw mechanism 9 is composed of a screw hole 14 provided in the screw receiving portion 6 and a bolt 15 screwed into the screw hole 14, and the protruding end of the bolt 15 has a wedge body 10. The shaft body connecting tool for supporting a formwork according to claim 1, wherein the shaft body connecting tool is rotatably connected to the shaft body. 3. The frame 5 is formed of a cylindrical body having a polygonal cross section, and a screw receiving portion 6 is formed on one of the opposed cylindrical walls, and a socket portion 7 is formed on the other. A shaft body connecting tool for supporting the formwork according to the above. 4. The form supporting projection according to claim 1, 2 or 3, wherein a projection 33 for preventing slip is formed on each of the contact surfaces 17 of the wedge body 10 with the shaft 4 and the reinforcing bar 2. Shaft coupling. 5. A pair of side walls 1 forming a socket portion 7.
At least one of the side walls 1 and 2 is opposed to the side wall 1
The shaft connector for supporting a formwork according to claim 2, 3 or 4, wherein the shaft connector is inclined toward the second side. 6. A screw receiving portion 6 is provided continuously on one side wall 12, and a screw shaft 15 is continuously provided on the other side wall 12.
a regulating wall 31 that intersects with the regulating wall 31 is provided.
6. A shaft body connecting tool for supporting a formwork according to claim 2, wherein the through-hole 32 provided through the screw shaft 15a is externally fitted between the screw receiving portion 6 and the wedge body 10. 7. A relief hole 25 is provided in the base wall 11 of the socket portion 7 facing the wedge body 10 so as to avoid contact interference between the wedge body 10 and the base wall 11. 3,
7. The shaft connector for supporting a formwork according to 4, 5, or 6.