KR101134368B1 - A support band structure for a concrete mold and an assembly thereof - Google Patents

Abstract

The present invention provides a support band structure for concrete formwork, the support band structure includes a hollow long rectangular parallelepiped band plate and a length adjusting movable unit installed inside at least one end of the band plate, wherein the band plate is It has a plurality of positioning holes in the upper and lower surfaces in the longitudinal direction, the length adjustment movable unit is a rotary portion disposed outside the end of the band plate, a male screw rod integrally formed with the rotating portion, reciprocating in engagement with the male screw rod And a fixing pin pivotally connected to the movable block, the fixing pin being fixed to the positioning hole of another band plate vertically arranged through the positioning hole.

Description

SUPPORT BAND STRUCTURE FOR A CONCRETE MOLD AND AN ASSEMBLY THEREOF

The present invention relates to a support band structure for concrete formwork and assembly thereof for pouring concrete and firmly supporting concrete formwork from the outside during curing to construct a main structure such as a column or column of a building into concrete.

In general, the method of constructing columns or columns among the main skeletons in concrete during construction of the building is to reinforce the reinforcing bar on the upper part of the construction structure and install the formwork suitable for the construction design on the edge of the reinforcing bar and then pour and cure the concrete. After that, the formwork is separated.

The formwork is usually provided with fastening holes on both sides of the edge, the adjacent formwork is arranged so that the fastening holes formed on both sides of each other to face each other and then join the fastening pins formed with pin grooves through the fastening holes, and the respective fastening holes It is installed by inserting and fixing a predetermined fastening pin in the pin groove of the fastening pin exposed through.

However, such formwork has a problem that a gap between the formwork and the formwork coupled to the fastening pins under the strong pressure of the formwork, especially when the concrete is poured.

As shown in FIG. 1, as an attempt to solve this problem, a formwork supporting waler disclosed in Korean Patent Registration No. 10-907088 has been proposed.

The formwork support waler (A) is welded to the fixing portion 20 to form a rectangular rod fitting hole 21 on one side of the rectangular metal rod body (10; 10 '), a plurality of locations on the other side The crystal holes 31 and 31 'are formed in the longitudinal direction to form fitting parts 30 and 30', and the lead screw 23 is screwed to one head 22 of the fixing part 20. Cylindrical lead female screw 24 is fixedly coupled to the body of the fixing portion 20, the long hole 25 is formed in a direction orthogonal to the rod fitting hole 21, the lead screw 23 at one end At the other end with a through head portion 26, there is formed a pressing portion (not shown) in contact with the outer wall of the fitting portion 30 or 30 'of the other formwork supporting waler A fitted in the rod fitting hole 21. It is.

The formwork support waler (A) is arranged in a quadrilateral lattice so that the four walers are fitted into the rod fitting holes on the end side of the adjacent weirers, and rotates to adjust the width according to the size of the formwork. After the lead screw 23 is moved back and forth so that the pressing portion is moved back and forth in the rod fitting hole 21 through the through hole, when the proper alignment position is reached, the long holes 25 and the positioning holes 31 and 31 ' Adjust by inserting the fixing pin through.

However, this formwork supporting waler (A) has a rod body (10; 10 ') has a fixing portion 20 and a positioning hole (31; 31') having a rod fitting hole (21) with open sides. Since the fitting parts 30 and 30 'need to be welded to each other as two-piece structures having different structures from each other, there is a problem in that the manufacturing process is complicated and time-consuming and expensive.

Further, the head portion 26-the lead screw 23-the lead female screw 24-the pressing portion (not shown), which is a configuration for adjusting the width of the connection portion of the formwork supporting waler assembly according to the die size, is provided with a head portion. Since the lead screw-pressing portion is integrally formed, the head portion 26-lead screw 23-pressing portion is moved back and forth from the lead female screw 24 as the head portion 26 rotates. The portion of the) -lead screw 23 always protrudes outward from the side of the waler (A).

However, this condition is frequently exposed to sudden external shock or external force at the construction site where the building members are roughly handled, so that the problem of the lead screw 23 being bent by impact or external force frequently occurs, in which case the lead screw is more There is a problem that the forward and backward maneuvers are impossible, and the waler itself becomes often useless.

In addition, the fixing pins inserted through the long holes 25 and the positioning holes 31 and 31 ′ of the aligning walers to fix the wails are stored as a separate member by being connected to a part of the weiler by a strap or Since they are stored separately from the air and used for fixing only at the time of alignment, they are often lost during the storage or assembly of the waler, resulting in additional cost.

The present invention has been made to solve the above-mentioned problems of the prior art, to stably support the load applied to the concrete formwork when placing concrete to construct the main skeleton of the building, the structure is simple, easy to manufacture and install, easy to assemble Assembly tolerance can be adjusted without protruding to the outside during operation, so there is no risk of damage to the external force or impact even in the construction environment where the roughness is handled before and after installation. An object of the present invention is to provide a support band structure for concrete formwork and an assembly thereof without fear of losing pins.

In order to achieve the above object, the present invention provides a support band structure for concrete formwork, the support band structure is a hollow long rectangular parallelepiped band plate and a unit for adjusting the length installed inside at least one end of the band plate. It includes, the band plate has a plurality of positioning holes in the longitudinal direction on the upper and lower surfaces, the length adjustment movable unit is a rotary portion disposed outside the end of the band plate, a male screw rod integrally formed in the rotary portion, And a movable block reciprocally engaged with the male screw rod, the fixing pin being pivotally connected to the movable block, the fixing pin being fixed to the positioning hole of another band plate vertically arranged through the positioning hole.

In one embodiment, the length adjusting movable unit may be installed inside both ends of the band plate.

In one embodiment, the positioning hole provided on the side of the band plate on which the length adjusting movable unit is installed may be a long hole through which the fixing pin can pivot.

In one embodiment, the long hole may be longer than the length of the fixing pin.

In one embodiment, the band plate may be composed of a length adjusting-fixing section having the long hole on the upper and lower surfaces and a positioning-fixing section having positioning holes at predetermined intervals in the longitudinal direction on the upper and lower surfaces.

According to an embodiment, the length adjusting movable unit may have a shank portion between the rotating portion and the screw rod, and the shank portion may be disposed in a bearing receptacle.

In one embodiment, the movable block may include a block portion having a female screw hole engaged with the screw rod, and a U-shaped bridge arm integrally formed with the block portion and pivotally pivotally connected with the fixing pin. Can be.

According to one embodiment, the fixing pin has a head flange, a middle cylindrical rod portion having a slot in the lower portion, a planar movable tail portion pinned to a slot in the cylindrical rod portion and having a central long hole, the movable tail portion at its tip It can consist of rounded corners and angular corners.

According to another aspect of the invention, there is provided a support band assembly for concrete formwork, wherein the support band assembly is cross-linked to be length-adjusted on the first pair of support band structures and the first pair of support band structures arranged parallel to each other. And a second pair of support band structures arranged parallel to each other so as to be fixedly assembled into each other, each of the support band structures having an integral hollow elongated rectangular band plate having a plurality of positioning holes along the longitudinal direction on the upper and lower surfaces thereof; And a length adjusting movable unit installed inside one end of the band plate, wherein the length adjusting movable unit includes a rotating part disposed outside the end of the band plate, a male screw rod integrally formed with the rotating part, and a male screw rod. A movable block engaged with the reciprocating movement, the pivoting of the movable block The shaft is connected, and a hole for the positioning of the other band plate vertically arranged through-hole for the positioning pin comprises a dockable fixed.
According to another aspect of the present invention, there is provided a support band assembly for concrete formwork, wherein the support band assembly is in a cross state such that the support band assembly is length-adjusted on the first pair of support band structures and the first pair of support band structures arranged parallel to each other. A second pair of support band structures arranged parallel to each other so as to be fixedly assembled into each other, each of the first pair of support band structures having a hollow elongated rectangular parallelepiped having a plurality of positioning holes in the longitudinal direction on the upper and lower surfaces thereof; A band plate, each of the second pair of support band structures each having a plurality of positioning holes in a longitudinal direction at upper and lower surfaces thereof, the hollow elongated rectangular band plate integrally formed, and movable for length adjustment provided at both ends of the band plate; And a unit for adjusting the length of the band play A rotating part disposed outside the end of the screw, a male screw rod integrally formed with the rotating part, a movable block reciprocatingly engaged with the male screw rod, and pivotally connected to the movable block, and vertically connected through the positioning hole. It includes a fixing pin that can be fixed to the positioning holes of the other band plate arranged.
According to another aspect of the present invention, there is provided a support band assembly for concrete formwork, wherein the support band assembly is in a cross state such that the support band assembly is length-adjusted on the first pair of support band structures and the first pair of support band structures arranged parallel to each other. A second pair of support band structures arranged parallel to each other so as to be fixedly assembled into each other, each of the first pair of support band structures having a hollow elongated rectangular parallelepiped having a plurality of positioning holes in the longitudinal direction on the upper and lower surfaces thereof; A band plate, each of the second pair of support band structures having a plurality of positioning holes in the longitudinal direction at the top and bottom thereof, the hollow elongated rectangular band plate integrally with the first end of both ends of the band plate; And a movable length adjusting unit installed therein, wherein the second pair of support band structures The second end of the plate is fixed to the rotary pin member so as to be pivotable with one end of the first pair of support band structures, and the length adjusting movable unit is integral with the rotating part disposed outside the end of the band plate. A formed male screw rod, a movable block reciprocatingly engaged with the male screw rod, and pivotally connected to the movable block so as to be fixed to a positioning hole of another band plate vertically arranged through the positioning hole. It includes a pin.

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In one embodiment, the positioning hole provided on the side of the band plate on which the length adjusting movable unit is installed may be a long hole through which the fixing pin can pivot.

In one embodiment, the long hole may be longer than the length of the fixing pin.

In one embodiment, the band plate having one end of the length adjusting movable unit installed therein is a length adjusting-fixing section having the long hole on the upper and lower sides and a positioning-fixing section having positioning holes at predetermined intervals in the longitudinal direction on the upper and lower surfaces. Can be done.

According to an embodiment, the length adjusting movable unit may have a shank portion between the rotating portion and the screw rod, and the shank portion may be disposed in a bearing receptacle.

In one embodiment, the movable block may include a block portion having a female screw hole engaged with the screw rod, and a U-shaped bridge arm integrally formed with the block portion and pivotally pivotally connected with the fixing pin. Can be.

According to one embodiment, the fixing pin has a head flange, a middle cylindrical rod portion having a slot in the lower portion, a planar movable tail portion pinned to a slot in the cylindrical rod portion and having a central long hole, the movable tail portion at its tip It can consist of rounded corners and angular corners.

According to the above-described configuration, the support band structure and the assembly for the concrete formwork of the present invention stably supports the load applied to the concrete formwork during the concrete pouring to construct the main skeleton of the building, and the structure is simple and easy to manufacture and install It is possible to adjust the assembly tolerance without protruding to the outside when operating the adjusting part to adjust the assembly tolerance during assembly, so there is no risk of damage to the external force or impact even in the construction environment where it is roughly treated before and after installation. Since there is no fear of the loss of the fixing pins necessary for fixing, it is possible to stably support the concrete formwork at low cost and to reliably cast concrete and cure.

1 is a plan view showing the configuration of a formwork assembly according to the prior art;
2 is an exploded and assembled perspective view of a support band structure for concrete formwork according to an embodiment of the present invention;
3 is a cross-sectional view showing the fastening state by the fixing pin and the operation of the movable unit for adjusting the length in the concrete formwork support structure of FIG.
4 is a cross-sectional view illustrating a step of assembling the concrete formwork support structure of FIG. 2 with another support structure;
5 is a transparent perspective view of a support band structure for concrete formwork according to another embodiment of the present invention;
6 is a transparent perspective view of a support band structure for concrete formwork according to another embodiment of the present invention;
7 is a perspective view of a support band assembly for concrete formwork according to one embodiment configured through assembly between the support band structures of the embodiment of FIG. 2;
8 is a perspective view of a support band assembly for concrete formwork according to another embodiment constructed through assembly between the support band structures of the embodiments of FIGS. 5 and 6;
9 is a perspective view of a support band assembly for concrete formwork according to another embodiment constructed through assembly between the support band structures of the embodiments of FIGS. 2 and 6.

Hereinafter, exemplary embodiments of the support band structure for concrete formwork and the assembly thereof according to the present invention will be described in detail with reference to FIGS. 2 to 9.

As will be described below, the present invention focuses on a support band assembly for concrete formwork as well as a hollow cuboid plate shaped support band structure as an element constituting the assembly.

Figure 2 is an exploded and assembled perspective view of the concrete formwork support band structure according to an embodiment of the present invention, Figure 3 is a fastening state by the operation and the fixing pin of the length adjustment movable unit in the concrete formwork support structure of Figure 2 4 is a cross-sectional view illustrating a step of assembling the concrete formwork support structure of FIG.

Referring to these drawings, the concrete formwork support band structure 100A includes a hollow long rectangular parallelepiped band plate 100a, 100b and a movable length adjusting unit 150 provided inside the plate end.

The band plates 100a and 100b are usually supported on a support frame outside the formwork when installed, and have a plurality of positioning holes along the longitudinal direction on the upper and lower surfaces.

The band plate may, for example, consist of a length adjusting-fixing section 100a to one side and a positioning-fixing section 100b to the other side.

The length adjusting-fixing section 100a and the positioning-fixing section 100b are both parts related to positioning, and the band plates vertically adjacent to each other when forming the formwork support band assembly of the present invention (for example, 100A in FIG. 7). ) Is arranged up and down so that the length adjusting-fixing section 100a of the upper plate 100A and the positioning-fixing section 100b of the lower plate 100A are arranged up and down to face each other, and then the upper and lower arranged It is a part which is fixed by the fixing pin 158 of the length adjustment movable unit 150 mentioned later through the sections 100a and 100b.

The length adjusting-fixing section 100a of the fixing section is a portion in which the length is adjusted by the operation of the length adjusting movable unit 150 to be described later when the length is adjusted according to the mold size when the assembly is aligned. -The fixing section 100b is a portion where the fixing pin is finally inserted and fixed in the state where the length adjustment is completed by the movable unit 150 in the other length adjusting-fixing section.

Positioning holes formed in the upper and lower surfaces of the length adjustment-fixing section 100a is made of a long hole (120a), the fixing pin 158 of the length adjustment movable unit 150 is the long hole ( By pivotal insertion through 120a) it is secured to another support band structure which is arranged vertically.

The positioning-fixing section 100b has positioning holes 120b on the upper and lower sides at predetermined intervals in the longitudinal direction, and the interval is formed to correspond to the configuration of the formwork normally standardized in the building industry.

The length adjusting movable unit 150 may include a rotating part 151 disposed outside the end of the band plate 100A, a male screw rod 154 integrally formed with the rotating part 151, and the male screw rod 154. A fixed pin that is pivotally connected to the movable block 157 to be engaged and reciprocated, the movable block 157 to be pivotable to a positioning hole of another band plate vertically arranged through the positioning hole. 158.

The movable block 157 is formed integrally with the block portion 157a having a female screw hole 157a 'engaged with the screw rod 154, and the block portion 157a, and the fixing pin 158 is It may include a U-shaped bridge arm 157b having a shaft hole 157b 'which is pivotally connected to a shaft 157c.

In addition, the length adjusting movable unit 150 is adjustable in length from the rotating part 151 outside the plate 155 through the hole 155a of the plate 155 provided at the end of the length adjusting-fixing section 100a. It extends into the fixed section 100a and has a shank portion 152 and a threadless rod portion 153 between the rotating portion 151 and the screw rod 154, wherein the shank portion 152 has a bearing receptacle. 156 may be disposed.

Therefore, when the rotating part 151 is rotated in one direction, the screw rod part 154 integrally extending from the rotating part 151 rotates together, and the movable block 157 which is male and female screwed to each other on the screw rod 154. ) Rotates in the opposite direction to the rotation in conjunction with the rotation, and when the rotating part is rotated in the opposite direction, the movable block 157 moves in the opposite direction, so that the rotating unit 151 is in place Even if it rotates, only the movable portion 175 is moved back and forth within the length adjusting-fixing section 100a according to the rotational direction thereof, so that the length can be adjusted to the final position where the fixing pin 158 is inserted later.

The rotating part 151 is shown to have a ring installed for ease of grip, but this may be omitted.

The fixing pin 158 has a head flange 158a having a shaft hole 158a ', an intermediate cylindrical rod portion 158b having a slot 158c at the bottom, and a slot 158c of the cylindrical rod portion 158b. A flat movable tail portion 159 having a pin P and having a central long hole 159c is provided.

The tip portion of the movable tail 159 is composed of a rounded corner 159a and a rectangular corner 159b, and as shown in FIG. 2, the movable tail portion 159 is pivotable in the direction AA of the rounded corner 159a, and vice versa. In the direction BBB of the rectangular corner 159b, the corner corner 159b is caught by the upper surface of the slot 158c and cannot be turned.

Therefore, even if any swing or external force is applied after the fixing pin 158 is inserted into the vertically aligned plate, the tail portion 159 is kept in a pivoted state in one direction and is in an upright position only through a special alignment operation. The pin is accidentally dislodged to prevent the plate assembly from being released.

As shown in Figures 3 and 4, the process of assembling and fixing after the position alignment of the support band structure (100A) is as follows.

First align the formwork support band structure (100A) of the present invention up and down with each other and then adjust the length adjustment movable unit 150 to the form size to move the movable block 157, for example to the P1 position or P2 position to the appropriate position Place it in

At this time, the fixing pin 158 of the length adjusting movable unit 150 is pivoted through the long hole 120a of the length adjusting-fixing section 100a of the upper band support structure 100A by its own weight so as to penetrate vertically. Then, it is inserted into the positioning hole 120b of the lower band support structure 100A.

In this case, the long hole 120a is formed longer than the length of the fixing pin 158 so that the fixing pin 158 can be inserted through the turning.

Thereafter, when the tail part 159 of the fixing pin is pivoted in one direction to prevent the fixing pin 158 from being separated, the fixing of the support band structures arranged vertically is completed.

Support band structures 100A of the above-described embodiment and support band structures 100B and 100C of another embodiment are shown in FIGS. 5 and 6.

The support band structure 100B of the embodiment of FIG. 5 has a configuration in which the length adjustment movable unit 150 is installed inside both ends of the band plate, and the support band structure 100C of the embodiment of FIG. 6 is the movable unit for length adjustment. The configuration of 150 is omitted and has a configuration modified to be suitable for assembly with the support band structure 100B of FIG. 5.

In this case, only the positioning hole 120a may be formed in the band plate of the support band structure 100B of FIG. 5 on the upper and lower surfaces of both ends, and the band plate of the support band structure 100C of FIG. Only a plurality of positioning holes 120b may be formed in the longitudinal direction.

According to another aspect of the present invention, there is provided a support band assembly for concrete formwork, in which the support band structures described above are assembled together.

7 is a perspective view of a support band assembly for concrete formwork according to an embodiment configured through assembly between the support band structures of the embodiment of FIG. 2, and FIG. 8 is configured through assembly between the support band structures of the embodiments of FIGS. 5 and 6. A perspective view of a support band assembly for concrete formwork according to another embodiment, and FIG. 9 is a perspective view of a support band assembly for concrete formwork according to another embodiment configured through assembly between the support band structures of the embodiment of FIGS. 2 and 6.

Referring to these figures, the support band assembly for concrete formwork according to one aspect of the present invention is a first pair of support band structures arranged in parallel with each other [Fig. 7; 100A; 100A, FIG. 8; 100C; 100C; (100C; 100C)], a second pair of support band structures arranged parallel to each other such that they are fixedly assembled in a cross state to be length-adjusted on the first pair of support band structures (FIG. 7; 100A; 100A, FIG. 8; (100B; 100B), FIG. 9; (100A; 100A)].

In this case, since the support band structures 100A, 100B, and 100C are the same as those of the above-described embodiment, detailed descriptions thereof will be omitted.

The support band assembly shown in FIG. 7 is configured by assembling between the support band structures 100A of the embodiment of FIG. 2, and is opposite to the support band structure 100A having the movable unit 150 for length adjustment disposed at one end thereof. After arranging them in parallel with each other, the supporting band structures 100A having the same configuration are arranged so as to cross the upper portions thereof.

At this time, the fixing pin 158 of the length adjusting movable unit 150 of the upper support band structure 100A is pivotally inserted through the long hole 120a to position the hole 120b for positioning the lower support band structure 100A. It is inserted into and fixed to the opposite side of the fixing pin 158 of the movable unit 150 for adjusting the length of the lower support band structure (100A) likewise pivotally inserted through the long hole (120a) to the upper support band structure By standing and inserting into the positioning hole 120b of 100A, mutual assembly is performed.

The support band assembly shown in FIG. 8 is configured by assembling between the support band structures 100B and 100C of the embodiment of FIGS. 5 and 6, and does not include the support band structure 100C without the length adjusting movable unit 150. After arranging parallel to each other, the support band structure 100B in which the length adjustment movable unit 150 is arrange | positioned at both ends so that it may cross on the upper part is comprised by arranging parallel to each other.

At this time, the fixing pin 158 of the length adjusting movable unit 150 of the upper support band structure 100B is pivotally inserted through the long hole 120a to position the hole 120b of the lower support band structure 100C. Is inserted into and fixed to the opposite side, and is assembled in the same manner on the opposite end side thereof.

In addition, the support band assembly shown in Figure 9 is configured through the assembly between the support band structure (100A; 100C) of the embodiment of Figures 2 and 6, the support band structure that is not provided with a movable unit 150 for adjusting the length ( After arranging 100C in parallel with each other, the support band structure 100A in which the length adjustment movable unit 150 is disposed at one end is arranged in parallel with each other in the opposite direction so as to cross on the upper portion thereof.

At this time, the bolt-shaped shaft B is inserted as the rotating shaft member through the positioning hole 120b of the upper support band structure 100A and the positioning hole 120b of the lower support band structure 100C. The fixing pin 158 of the length adjusting movable unit 150 of the upper support band structure 100A is pivotally inserted through the long hole 120a on the opposite end side thereof, and is fixed by the nut N. The mutual assembly is performed by being inserted and fixed in the positioning hole 120b of the structure 100C.

According to the present invention, the support band assembly for concrete formwork, which can be assembled in various forms, can be obtained through the deformation of the support form for the concrete formwork support band structure (100A, 100B, 100C) as described above and shown.

The above described and illustrated embodiments are not limited as illustrated and it will be apparent to those skilled in the art that various modifications and variations are possible.

Claims (17)

A hollow, long, rectangular parallelepiped band plate; A length adjusting movable unit installed inside at least one end of the band plate,
The band plate has a plurality of positioning holes in the longitudinal direction on the upper and lower surfaces,
The movable unit for adjusting the length is:
A rotating part disposed outside the end of the band plate;
A male screw rod integrally formed with the rotating part;
A movable block engaged with the male screw rod to reciprocate;
A fixed pin pivotally connected to the movable block and fixed to a positioning hole of another band plate vertically arranged through the positioning hole
Support band structure for concrete formwork comprising a. The support band structure for concrete formwork according to claim 1, wherein the length adjusting movable unit is installed inside both ends of the band plate. The support band structure for concrete formwork according to claim 1 or 2, wherein the positioning hole provided on the side of the band plate on which the length adjusting movable unit is installed is a long hole through which the fixing pin can be pivoted. The support band structure for concrete formwork of claim 3, wherein the long hole is longer than a length of the fixing pin. 4. The support band structure for concrete formwork as set forth in claim 3, wherein the band plate comprises a length adjusting-fixing section having the long hole on the upper and lower surfaces and a positioning-fixing section having positioning holes at a predetermined interval in the longitudinal direction on the upper and lower surfaces. The support band structure for concrete formwork according to claim 1, wherein the length adjusting movable unit has a shank portion between the rotating portion and the screw rod, and the shank portion is disposed in a bearing receptacle. 2. The movable block of claim 1, wherein the movable block includes a block portion having a female screw hole engaged with the screw rod, and a U-shaped bridge arm integrally formed with the block portion and pivotally pivotally connected to the fixing pin. Support band structure for concrete formwork. 2. The fixed pin of claim 1, wherein the fixing pin has a head flange, a middle cylindrical rod portion having a slot at the bottom, and a flat movable tail portion pinned to a slot of the cylindrical rod portion and having a central long hole, wherein the movable tail portion is at its tip. Support band structure for concrete formwork consisting of two round and square corners. A first pair of support band structures arranged in parallel with each other and a second pair of support band structures arranged in parallel with each other to be fixedly assembled in a cross state to be length-adjusted on the first pair of support band structures,
Each of the support band structures has a hollow elongated rectangular parallelepiped band plate having a plurality of positioning holes along the longitudinal direction on the upper and lower surfaces thereof, and a movable length adjusting unit installed inside one end of the band plate,
The length adjusting movable unit is pivotally connected to a rotary part disposed outside the end of the band plate, a male screw rod integrally formed with the rotating part, a movable block reciprocally engaged with the male screw rod, and the movable block. And a fixing pin that can be fixed to a positioning hole of another band plate vertically arranged through the positioning hole. A first pair of support band structures arranged in parallel with each other and a second pair of support band structures arranged in parallel with each other to be fixedly assembled in a cross state for length adjustment on the first pair of support band structures,
Each of the first pair of support band structures has a hollow elongated rectangular parallelepiped band plate having a plurality of positioning holes in the longitudinal direction on the upper and lower surfaces thereof and integrally;
Each of the second pair of support band structures has a hollow long rectangular parallelepiped band plate integrally formed with a plurality of positioning holes in the longitudinal direction on the upper and lower surfaces thereof, and a movable unit for length adjustment provided inside both ends of the band plate,
The length adjusting movable unit is pivotally connected to a rotary part disposed outside the end of the band plate, a male screw rod integrally formed with the rotating part, a movable block reciprocally engaged with the male screw rod, and the movable block. And a fixing pin that can be fixed to a positioning hole of another band plate vertically arranged through the positioning hole. A first pair of support band structures arranged in parallel with each other and a second pair of support band structures arranged in parallel with each other to be fixedly assembled in a cross state for length adjustment on the first pair of support band structures,
Each of the first pair of support band structures has a hollow elongated rectangular parallelepiped band plate having a plurality of positioning holes in the longitudinal direction on the upper and lower surfaces thereof and integrally;
Each of the second pair of support band structures has a hollow long rectangular parallelepiped band plate integrally formed with a plurality of positioning holes in the longitudinal direction on the upper and lower surfaces thereof, and a movable unit for length adjustment provided inside the first end of both ends of the band plate. And a second end of the band plate of the second pair of support band structures is pivotally fixed to one end of the first pair of support band structures by a rotating shaft member,
The length adjusting movable unit is pivotally connected to a rotary part disposed outside the end of the band plate, a male screw rod integrally formed with the rotating part, a movable block reciprocally engaged with the male screw rod, and the movable block. And a fixing pin that can be fixed to a positioning hole of another band plate vertically arranged through the positioning hole. The support band assembly for concrete formwork according to any one of claims 9 to 11, wherein the positioning hole provided on the side of the band plate on which the length adjusting movable unit is installed is a long hole through which the fixing pin can pivot. The support band assembly of claim 12, wherein the long hole is longer than a length of the fixing pin. 13. The band-setting section according to claim 12, wherein the band plate on which one end of the length adjusting movable unit is provided has a length adjusting-fixing section having the long hole on the upper and lower surfaces and a positioning-fixing section having positioning holes at predetermined intervals in the longitudinal direction on the upper and lower surfaces. Support band assembly for concrete formwork consisting of. 12. The support band assembly according to any one of claims 9 to 11, wherein the length adjusting movable unit has a shank portion between the rotating portion and the screw rod, and the shank portion is disposed in a bearing receptacle. 12. The movable block according to any one of claims 9 to 11, wherein the movable block has a block portion having a female screw hole engaged with the screw rod, and is integrally formed with the block portion and the fixing pin is pivotally connected. A support band assembly for concrete formwork comprising a U-shaped bridge arm. 12. The fixed pin according to any one of claims 9 to 11, wherein the fixing pin has a head flange, a middle cylindrical rod portion having a slot at the bottom, and a flat movable tail portion pinned to a slot of the cylindrical rod portion and having a central long hole. And wherein the movable tail portion has a rounded edge and a square edge at a distal end thereof.

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