JP2007092310A - Inner form structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inner form structure enabling the easy assembly and disassembly of a scaffold. <P>SOLUTION: This inner form structure 1 is disposed on the inside of an outer form 100 and used for manufacturing a concrete structure in the clearance thereof from the outer form frame 100. The inner form structure comprises an opening/closing window formed in the inner form 2 and a scaffold forming member 10 used for the scaffold for forming reinforcements for the concrete structure installed between the outer form 100 and the inner form 2 and installed movably between a storage position A on the inside of the opening/closing window and a use position B where at least its end is projected to the outside through the opening/closing window. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an inner mold structure that is arranged inside an outer mold and for producing a concrete structure with the outer mold, and more specifically, has a long cross-sectional shape such as a tunnel. The present invention relates to an inner mold structure suitable for producing a concrete structure substantially identical in the vertical direction.

  The above-described inner mold frame structure is generally configured to connect a large number of panel plates (see, for example, Patent Document 1). And a reinforcing bar is provided in the concrete structure produced between the inner formwork structure and the outer formwork having such a configuration.

When the gap between the outer mold frame and the inner mold frame is wide, the reinforcing bars are manufactured by assembling a scaffold in the gap and using the scaffold. On the other hand, when the gap is narrow, the scaffold is generally manufactured by assembling a scaffold outside the inner mold before the outer mold is formed. And after producing the rebar, the scaffold is disassembled.
JP 2005-126918 A

  By the way, the assembly of the scaffold is usually performed by connecting a large number of metal pipes vertically and horizontally to form a scaffold body, and attaching a footboard or a handrail to an appropriate location of the scaffold body.

  However, when the above-mentioned concrete structures such as tunnels are not produced uniformly for the entire length, but are produced while connecting the partial parts, the inner and outer molds are moved and the scaffold is also used. It is necessary to assemble and disassemble each time it is moved, and assembling and disassembling the scaffolds is a very troublesome task.

  The present invention has been made to solve the problems of the prior art as described above, and it is an object of the present invention to provide an inner mold structure that can easily assemble and disassemble a scaffold.

  An inner formwork structure according to claim 1 of the present invention is an inner formwork structure which is arranged inside an outer formwork for producing a concrete structure with the outer formwork. Used for the scaffold for forming the reinforcing bar for the concrete structure provided between the outer window and the inner frame, and the storage position inside the window and the window It is further characterized by comprising a scaffold forming member that is provided so as to be movable over at least a use position where the tip portion projects outward.

  An inner mold structure according to a second aspect of the present invention is the inner mold structure according to the first aspect, wherein a number of the scaffold forming members are provided in the horizontal direction at the same height position. .

  An inner mold structure according to a third aspect of the present invention is the inner mold structure according to the second aspect, wherein the scaffold forming member is provided at a plurality of height positions.

  An inner mold structure according to a fourth aspect of the present invention is the inner mold structure according to any one of the first to third aspects, wherein a skeleton structure that supports the inner mold frame is provided inside the inner mold frame. The base end side of the scaffold forming member is slidably supported by a support member attached to the skeleton structure.

  The inner mold structure according to claim 5 of the present invention is the inner mold structure according to claim 4, wherein a retaining member for preventing the scaffold forming member from coming off from the support member is provided at the base end of the scaffold forming member. It is characterized by being.

  An inner formwork structure according to claim 6 of the present invention is the inner formwork structure according to any one of claims 1 to 5, wherein adjacent ones of a gate-like handrail are arranged at the tip of the scaffold forming member. A handrail attachment member to which one of the lower ends of each of these is detachably attached is provided.

  In the case of the inner mold frame structure of the present invention, the scaffold forming member stored in the storage position inside the inner mold frame can project at least the tip from the open / close window by opening the open / close window, For example, a scaffold is formed by attaching a footboard or a handrail to the protruding portion of the scaffold forming member. And the reinforcement is produced using the scaffold. In addition, after the reinforcing bar is manufactured, it is possible to use it as an original inner frame by removing the step board and the handrail, moving the scaffold forming member to the storage position, and closing the open / close window. Therefore, although it is necessary to attach and disassemble the footboard and handrail, it is no longer necessary to connect and disassemble the scaffold body for attaching the footboard and handrail as in the past, so the assembly and disassembly of the scaffold can be performed easily. obtain.

  According to the second aspect, the scaffold can be easily arranged along the longitudinal direction of the inner mold at the same height position.

  According to the third aspect, it is easy to form the scaffold by shifting the position in the height direction.

  According to the fourth aspect, by sliding the scaffold forming member, it can be displaced between the storage position and the use position, and the handling becomes easy.

  According to the fifth aspect, even if the scaffold forming member in the storage position is slid until the retaining member hits the support member and stops, the retaining member is retained. Moreover, it becomes a use position in the secured position.

  According to the sixth aspect, the handrail is easily attached.

  The present invention will be specifically described below.

  FIG. 1 is a front view showing an inner mold structure according to an embodiment of the present invention, and FIG. 2 is a side view showing the inner mold structure. FIG. 1 shows a state in which the outer mold frame is separated from the left half by a predetermined distance via a separator, and the right half has no outer mold frame and a scaffold is formed. Represents. Reference numeral 101 in FIG. 1 is a scaffold provided in advance on the outside of the outer mold 100 and is different from the scaffold for the inner mold.

  This inner formwork structure 1 is arranged inside the outer formwork 100 and is for producing a concrete structure with the outer formwork 100. In this embodiment, the concrete structure has an arch shape.

  The inner mold structure 1 includes an inner mold 2 having an opening / closing window 3 and a scaffold forming member 10. In this embodiment, the inner mold 2 has a structure in which a large number of panels 2b for forming the inner surface of the concrete structure are fixed to the outer side of the arch-shaped frame 2a corresponding to the inner surface of the concrete structure. The frame 2a is supported by the skeleton structure 4 provided on the inside thereof. The skeletal structure 4 is produced by connecting metal pieces 5 such as shaped steel, for example, vertically and horizontally and obliquely.

  As shown in FIG. 2, a large number of opening / closing windows 3 are provided in the inner mold 2 in the horizontal direction at a plurality of height positions. In the present embodiment, on one side of the inner mold 2, a total of 40 pieces of 5 × 8 in total are provided. The open / close window 3 is similarly arranged on the other side of the inner mold 2.

  3 is a front view of the opening / closing window portion as viewed from the inside of the inner mold, FIG. 4 is a plan view thereof, and FIG. 5 is a left side view thereof.

  The opening / closing window 3 includes an opening 6 provided in the inner mold 2 and a door 7 that closes the opening 6. The door 7 can be opened and closed inside. Specifically, the door 7 is formed to be slightly larger than the opening 6, and when the handle 8 provided at the upper inside of the door 7 is pulled, the door 7 swings around the hinge 9 provided at the lower part of the door 7. When the handle 8 is pulled up and the handle 8 is pulled up, the door 7 closes the opening 6. Then, as shown in FIG. 5, with the door 7 closed, a wedge-shaped lock piece 6 c is inserted downward into the hole 6 b formed in the horizontal piece 6 a provided on the upper side of the opening 6. Can be locked in a closed state (indicated by a two-dot chain line). Conversely, when the lock piece 6c is pulled upward, the door 7 can be opened (indicated by a one-dot chain line).

  FIG. 6A is a front view showing a scaffold forming member provided inside the opening / closing window, and FIG. 6B is a plan view thereof.

  The scaffold forming member 10 shown in FIG. 6 is disposed inside each opening / closing window 3, and a square pipe is used in this embodiment. In this embodiment, two pairs of support members 11 that are slidably supported are provided to the scaffold forming member 10 in the vertical position. The vertical distance H between the pair of support members 11 is substantially matched to the height dimension of the scaffold forming member 10. The distance L between the two pairs of support members 11 is set to an appropriate length that can withstand a desired weight described later. Further, each support member 11 is fixed to the skeleton structure 4 so as to be in a predetermined position.

  Therefore, the scaffold forming member 10 supported by the support member 11 is slid in the inner and outer directions of the inner mold 2, so that the scaffold forming member 10 is stored in the storage position A inside the opening / closing window 3 and the distal end portion of the scaffold forming member 10. Can be moved over the use position B projecting outside the opening / closing window 3. This facilitates handling.

  Further, a bolt 12 as a retaining member is attached to the proximal end side of the scaffold forming member 10. Therefore, when the door 7 is opened and the scaffold forming member 10 is pulled out from the opening 6 so as to be in the use position B, the bolt 12 comes into contact with the support member 11 on the inner back side and stops. It can be easily set at the use position B by stopping. And a footboard and a handrail can be attached to the front-end | tip part which protruded outside the opening-and-closing window 3 of the scaffold formation member 10 of the use position B. FIG.

  On the other hand, a handrail attachment member 13 is attached to the distal end side of the scaffold forming member 10. In this embodiment, the handrail mounting member 13 is a round pipe with a bottom, and two handrail mounting members 13 are provided for one scaffold forming member 10.

  FIG. 7 is a view for explaining how to attach the handrail to the scaffold forming member. In the figure, the scaffold forming members of the same height arranged in the horizontal direction are targeted. Insert the right lower end of the handrail 14 disposed on the left side of the scaffold forming member 10 into the left hand side of the handrail mounting member 13 provided on each of the scaffold forming members 10, and attach it to the right handrail mounting member 13. The handrail 14 can be easily attached by inserting the lower left end of the handrail 14 disposed on the right side of the scaffold forming member 10. Similarly, the handrail 14 can be easily attached to the scaffold forming member 10 at other height positions. In addition, as the handrail 14, the thing of the shape corresponding to the space | interval of the adjacent scaffold formation member 10 is used.

  Further, a portion (the portion outside the inner frame 2 and inside the broken line as shown in FIG. 1) C for placing the reinforcing bars for the concrete structure is left for each scaffold forming member 10, and the tread plate 15 Is mounted (see FIG. 1). Reinforcing bars for concrete structures are produced at the location of the portion C using the tread plate 15. In addition, the setting of the space | interval L mentioned above is the state close | similar to the inner mold 2 in the state which the bolt 12 as a retaining member contact | abutted to a pair of support member 11 of the far side (inner back side) from the inner mold 2 The footboard and the handrail are attached to the outside of the portions supported by the pair of support members 11, and the length is set so as to be able to withstand the weight when the operator is placed on the footboard.

  Therefore, in the case of the inner mold frame structure 1 of the present embodiment configured as described above, the scaffold forming member 10 stored in the storage position A inside the inner mold frame 2 opens the opening / closing window 3 to The front end side can be protruded from the open / close window 3, and a scaffold is formed by attaching a footboard 15 or a handrail 14, for example, to the protruding portion of the scaffold forming member 10. And the reinforcement is produced using the scaffold. In addition, after the reinforcing bar is manufactured, the tread plate 15 and the handrail 14 are removed, the scaffold forming member 10 is moved to the storage position A, and the open / close window 3 is closed, so that the original formwork can be used. Therefore, although it is necessary to attach and disassemble the footboard 15 and the handrail 14, it is not necessary to connect and disassemble the scaffold main body for attaching the footboard 15 and the handrail 14 as in the prior art. Can be done easily. When the outer mold frame 100 is disposed outside the inner mold frame 2 with the tread plate 15 and the handrail 14 removed, the distance between the inner mold frame 2 and the outer mold frame 100 is determined by the separator 102. It is adjusted (see FIG. 1).

  Furthermore, in this embodiment, since many scaffold formation members 10 are provided in the horizontal direction at the same height position, treads and handrails are arranged along the longitudinal direction of the inner mold frame at the same height position. It becomes easy. In addition, since the scaffold forming member 10 is provided at a plurality of height positions, it is easy to form the scaffold in the height direction.

  In addition, although the example which uses a hollow square pipe as a scaffold formation member was shown in embodiment mentioned above, this invention is not limited to this. For example, it may be solid, and a cross-sectional shape other than a corner may be used. For example, an H shape, an I shape, a plate shape, or an inverted triangle shape may be used. Furthermore, it may be smaller than the opening of the opening / closing window and can be sized so that it can be taken in and out.

  In the above-described embodiment, two pairs of support members are used to support the scaffold forming member, but the present invention is not limited to this. Instead of the two pairs of support members, a cylindrical member in which the scaffold forming member can enter the inside may be used. In this case, if the length of the cylindrical support member is set so as to correspond to the separation length of the two pairs of support members, one cylindrical support member is sufficient.

  Furthermore, in the above-described embodiment, the door of the opening / closing window is configured to open and close in the vertical direction. However, the present invention is not limited thereto, and the door may be configured to open and close in the left-right direction.

It is a front view which shows the internal mold frame structure which concerns on one Embodiment of this invention. It is a side view which shows the internal mold frame structure of FIG. It is a front view when the opening-and-closing window part of FIG. 2 is seen from the inner side of an inner formwork. FIG. 4 is a plan view of FIG. 3. FIG. 4 is a left side view of FIG. 3. (A) is a front view which shows the scaffold formation member provided inside the opening-and-closing window, (b) is the top view. It is a figure for demonstrating how to attach the handrail with respect to a scaffold formation member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inner formwork structure 2 Inner formwork 3 Opening / closing window 4 Skeletal structure 10 Scaffold formation member 11 Support member 12 Bolt (prevention member)
13 Handrail mounting member 14 Handrail 100 Outer frame A Storage position B Use position

Claims (6)

In the inner mold structure for producing a concrete structure between the outer mold and the inner mold,
An opening and closing window provided in the inner mold,
Used as a scaffold for forming the reinforcing bar for the concrete structure provided between the outer mold frame and the inner mold frame, and the storage position inside the opening / closing window and at least the tip part outside the opening window An internal formwork structure comprising a scaffold forming member provided so as to be movable over a projecting use position. The inner mold structure according to claim 1,
An inner mold structure in which a large number of the scaffold forming members are provided in the horizontal direction at the same height position. The inner mold structure according to claim 2,
The inner mold structure, wherein the scaffold forming member is provided at a plurality of height positions. The inner mold structure according to any one of claims 1 to 3,
A skeletal structure that supports the inner mold frame is provided inside the inner mold frame, and a base end side of the scaffold forming member is slidably supported by a support member attached to the skeleton structure. Inner formwork structure. The inner mold structure according to claim 4,
An inner form frame structure, wherein a retaining member for preventing the scaffold forming member from coming off from the support member is provided at a proximal end of the scaffold forming member. The inner mold structure according to any one of claims 1 to 5,
An inner formwork structure characterized in that a handrail attachment member to which one of both lower ends of adjacent gate-like handrails is detachably attached is provided at the tip of the scaffold forming member.

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