JP3799154B2 - Formwork connection structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connecting structure of formwork materials used when a concrete structure (RC structure, SRC structure, etc.) is constructed by placing concrete on site or in a factory.
[0002]
[Prior art]
Conventionally, when constructing a concrete structure, after placing a steel frame or reinforcing bar, surround the steel frame and the reinforcing bar with a wooden formwork, and then put the ready-mixed concrete into the area surrounded by this formwork. The mold was removed after the concrete had hardened.
By the way, this type of wooden formwork material is often thrown away, and its use is being refrained for the purpose of environmental protection and the like. In recent years, instead of this wooden formwork material, it is made of synthetic resin or metal. Formwork materials, or permanent formwork materials such as cement, that is, formwork materials that are embedded together with concrete and become part of a concrete structure are being used.
In particular, a dedicated parapet driving mold material (Japanese Patent Laid-Open No. 6-10454) has been developed as a permanent mold material used for rooftops, veranda parapets or machine foundations.
[0003]
[Problems to be solved by the invention]
By the way, in these mold materials, there is a step at the connecting part when casting concrete due to warpage of each mold material, construction error, etc. It was necessary to perform concrete chipping and grinding work in the wrong place.
Here, in order to eliminate the above-mentioned misunderstanding, a formwork material is used in which concave and convex tongue structures that fit together are formed at the ends. In this case, the size of the structure to be constructed When the formwork material is cut in accordance with the above, there is a problem that the end portion of the formwork material cannot be joined by the tongue structure, and a misplaced portion is generated.
For this reason, using a connector having a U-shaped cross section in Japanese Patent Application No. 7-29874, the adjacent frame members are easily positioned and connected by this connector. Yes.
However, this connector can only be temporarily fixed by restraining the formwork material by the spring force of the connector to prevent mistakes, and it can be used to connect the formwork to withstand the concrete placing pressure. Had to be fixed again with foam ties and pipes.
In addition, it is necessary to form a certain interval in the joints between the mold materials in order to provide waterproof sealing after curing the concrete, but it has been difficult to secure this interval.
[0004]
The present invention has been made in view of the above circumstances, and provides a connecting structure for formwork materials that can extremely easily position adjacent moldwork materials at appropriate intervals and reliably connect them. The purpose is to do.
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the formwork connection structure according to claim 1 is constructed in such a manner that a parapet is constructed by placing concrete in a jaw formwork that is connected laterally and surrounds the jaw-shaped part of the parapet. In this case, the above-described jaw mold material is provided with a projection portion whose upper surface is inclined on the inner surface side of the jaw mold frame, and has a surface that follows the shape of the upper surface of the projection portion. A connecting tool disposed on the protrusion at the connecting portion, a clasp disposed on the outer side of the jaw mold frame, and the coupling tool inserted between the joint ends of the jaw frame materials. The jaw mold materials are connected to each other by bolts that fasten the clasp and the clasp so as to sandwich the jaw mold materials.
In other words, a connector having a surface that follows the inclined surface of at least the upper surface of the protrusion formed on the inner surface side of the jaw mold frame material is disposed at a connection location between adjacent jaw mold frame materials, and the jaw mold A fastener is provided on the outside of the frame member, and the connecting tool and the fastener are fastened and fixed to each other by a bolt inserted between the joint end surfaces of the jaw-shaped frame members. By sandwiching the mold frame material, the adjacent jaw mold frame materials are connected to each other in a positioned state. And in this way, a parapet can be constructed very easily by placing concrete in a state where the jaw formwork is positioned and connected.
[0006]
The formwork material connection structure according to claim 2 is characterized in that, in the formwork material connection structure according to claim 1, a female screw to which the bolt can be screwed is formed in the connection tool and / or fastener. It is characterized by.
That is, since the bolt is screwed into the screw because it is formed in the connector and / or the fastener, the connector and the fastener are fastened and fixed to each other, and the construction work can be simplified.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a connecting structure for form materials according to the present invention will be described with reference to the drawings.
In FIG.1 and FIG.2, the code | symbol 11 is a permanent formwork material (formwork material) used when constructing a parapet. The permanent mold member 11 includes a lower mold member 12, an upper mold member 13, and an intermediate mold member 14 disposed between the lower mold member 12 and the upper mold member 13. Yes.
The lower mold member 12, the upper mold member 13, and the intermediate mold member 14 are each composed of a concrete molded body, and are connected to each other by a connecting member 15 formed in an H-shaped cross section.
The permanent mold frame member 11 connected and installed in this way by the connecting member 15 is arranged in a state in which the reinforcing bar 19 is surrounded by a separator 18 on a normal plywood mold member member 17 provided on the opposite side. Concrete C is placed between the permanent mold member 11 and the mold member 17, and a concrete structure, here a parapet, is constructed with the concrete C.
[0008]
As shown in FIGS. 3 and 4, trapezoidal protrusions 21 having a trapezoidal cross section in the longitudinal direction are formed on the inner surface side of the upper mold member 13, and these trapezoidal protrusions are formed. In 21, a connecting tool 22 is fitted and disposed so as to straddle the adjacent upper formwork members 13 at a connecting portion in the horizontal direction. Further, on the outer surface side of the upper mold member 13, a washer plate 23 is disposed at a position facing the connector 22 so as to straddle the adjacent upper mold members 13.
[0009]
As shown in FIG. 5, a female screw 24 is formed at a substantially central position of the connector 22, and an insertion hole 25 is formed at a substantially central position of the washer plate 23. Then, the fixing bolt 26 inserted into the insertion hole 25 of the washer plate 23 from the outer surface side of the upper mold member 13 is inserted between the joining end surfaces of the upper mold member 13, and the female screw 24 of the connector 22. The connecting tool 22 and the washer plate 24 are fastened and fixed to each other, whereby the upper mold materials 13 are connected to each other.
The connector 22 is formed by, for example, bending or extruding, and has a shape in which holding pieces 32 are raised on both sides of the base portion 31. The holding pieces 32 are spaced apart from each other at the base portion. 31 is gradually widened from the connecting portion with the tip 31 toward the distal end side, and is formed in a cross-sectional C shape. In other words, the distance between the holding pieces 32 of the connector 22 is such that the distance L2 on the distal end side is wider than the distance L1 on the base 31 side, and is parallel or narrower to the trapezoidal protrusion 21 of the upper mold member 13. Is formed.
[0010]
In addition, the distance L1 on the connection side of the connecting piece 22 to the base 31 of the holding piece 32 is formed narrower than the width dimension of the trapezoidal protrusion 21 of the upper mold member 13. Therefore, when the connecting tool 22 is fitted to the trapezoidal protrusion 21 and the fixing bolt 26 is tightened, the wedge effect works, the upper mold materials 13 are reliably positioned and held, and are firmly fixed. It is like that.
[0011]
In FIG. 1, reference numeral 41 denotes a connecting rod connected to the separator 18, and reference numeral 42 denotes a fastening metal provided on the connecting rod 41. By fastening a nut 43 to the connecting rod 41, a fastening hardware 42 is provided. Thus, the formwork 17 is supported on the separator 18 through the vertical end thick 44 and the horizontal end thick 45.
[0012]
Next, the construction procedure of the parapet using the upper mold member 13, the lower mold member 12, and the intermediate mold member 14 will be described.
First, the reinforcing bar 19 is arranged on the top floor of the building, and the lower mold member 12, the upper mold member 13, and the intermediate mold member 14 are connected by the connecting member 15 so as to surround the reinforcing bar 19. The permanent mold member 11 is assembled, and the permanent mold member 11 and the normal mold member 17 are connected by the separator 18.
[0013]
Here, at the connecting portion in the longitudinal direction of the upper mold member 13 constituting the permanent mold member, the connecting tool 22 is fitted to the trapezoidal protrusion 21 formed on the inner surface thereof, and the outer member is connected to the outer surface. The washer plate 23 is disposed, and the fixing bolt 26 is inserted into the insertion hole 25 from the outside of the washer plate 23, and the fixing bolt 26 is screwed into the female screw 24 of the connector 22 and tightened.
In this way, the holding piece 32 of the connector 22 acts as a wedge, and the connector 22 is attached in a state in which the trapezoidal protrusion 21 of the upper mold member 13 is restrained. Are connected in the longitudinal direction in a state of being positioned by the connector 22.
[0014]
In this state, concrete C is placed between the permanent mold member 11 and the mold member 17, and the mold member 17 is removed to cure the concrete C.
If it does in this way, a parapet will be constructed by this permanent formwork material 11 and concrete C.
[0015]
As described above, according to the connection structure of the mold material by the connection tool 22 of the present embodiment, the connection tool 22 having a surface that follows the trapezoidal protrusion 21 formed on the inner surface side of the upper mold material 13. Is disposed at a connection point between the adjacent upper mold members 13, a washer plate 23 is disposed outside the upper mold member 13, and a fixing bolt 26 is inserted into the insertion hole 25 of the washer plate 23. By inserting and inserting into the gap between the joining end surfaces of the upper mold member 13, screwing in and tightening the female screw 24 of the connector 22, and sandwiching the upper mold member 13 between the connector 22 and the washer plate 23. It is very easy to connect the adjacent upper mold materials 13 in a state where they are positioned with respect to each other. That is, by positioning and connecting the upper mold member 13 constituting the mold member 17 in the longitudinal direction, the entire mold member 17 can also be positioned and connected in the longitudinal direction.
[0016]
Thereby, the up-down and surface direction shift | offset | difference in the connection location of the longitudinal direction of the formwork material 17 can be prevented reliably, and the repair work of a shift | offset | difference can be abbreviate | omitted. Therefore, it is possible to eliminate the labor required for the repair work of the shift and to shorten the construction work. In addition, the joint width between the formwork members 17 can be kept constant by the diameter of the fixing bolt 26, thereby facilitating the construction of the waterproof sealing at the joint and making sure construction possible. Waterproof performance can be improved.
[0017]
Next, a connector having another shape will be described with reference to the drawings.
The connecting tool 22A shown in FIG. 6 has a locking portion 51 that protrudes toward the trapezoidal protruding portion 21 of the upper mold member 13 on the inner surface side of the base portion 31 and the holding piece 32. FIG. The connecting tool 22 </ b> B shown is formed by forming a protrusion 52 that protrudes toward the trapezoidal protrusion 21 of the upper mold member 13 on the inner surface side of the base 31 and the holding piece 32. Then, when these coupling tools 22A and 22B are fitted to the trapezoidal protrusion 21 of the upper mold member 13, the locking part 51 or the protrusion 52 bites into the trapezoidal protrusion 21, so that the trapezoidal protrusion The locking force to 21 is greatly improved, and a further reliable connection state can be maintained.
[0018]
8 has a groove 53 formed on the inner surface side of the base portion 31 and the holding piece 32, and the connecting device 22D shown in FIG. 9 has an inner surface side of the base portion 31 and the holding piece 32. In addition, a concave portion 54 is formed. Then, when these connecting tools 22C and 22D are fitted to the trapezoidal protrusion 21 of the upper mold member 13, the trapezoidal protrusion 21 bites into the groove 53 or the concave portion 54, so that the trapezoidal protrusion 21 The locking force to the is greatly improved, and a more reliable connection state can be maintained.
[0019]
【The invention's effect】
As described above, according to the connection structure of the form material of the present invention, the following effects can be obtained.
According to the connection structure of the mold material according to claim 1, the connecting tool having a surface that follows the inclined surface of at least the upper surface of the protrusion formed on the inner surface side of the jaw mold material is adjacent to the jaw mold material. In addition to being arranged at the connection point between each other, fasteners are arranged outside the jaw frame material, and these connectors and fasteners are fastened together by bolts inserted between the joint end surfaces of the jaw frame materials. By fixing and clamping the jaw-shaped frame material by the coupling tool and the clasp, the adjacent jaw-shaped frame materials can be very easily connected to each other in a positioned state. In this way, a parapet can be constructed very easily by placing concrete in a state in which the chin-shaped frame members are positioned and connected.
In other words, when constructing the parapet, it is possible to reliably prevent the vertical and horizontal displacements at the longitudinal connection points of the chin mold material, and the displacement repair work can be omitted, and the displacement repair work. In addition to eliminating the labor required for the construction work, the construction work can be shortened. In addition, the joint width between the chin frame materials can be kept constant by the diameter of the fixing bolt, which makes it easier to perform waterproof sealing on the joint and ensures reliable construction and is waterproof. Performance can be improved.
[0020]
According to the connection structure of the formwork material according to claim 2, the connection tool and the fastener can be fastened and fixed to each other very easily by screwing the bolt into the screw because it is formed on the connector and / or the fastener. It is possible to simplify the construction work.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a cross-sectional view of a parapet in the middle of construction, illustrating a structure for connecting formwork members according to an embodiment of the present invention.
FIG. 2 is a plan view of a parapet that is in the middle of construction, illustrating a connecting structure of formwork members according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view of a connecting portion for explaining a connecting structure of formwork members according to an embodiment of the present invention.
FIG. 4 is a plan view of a connecting portion for explaining a connecting structure of formwork members according to an embodiment of the present invention.
FIGS. 5A and 5B are a side view and a front view of a connection tool for explaining the shape of the connection tool used in the form material connection structure according to the embodiment of the present invention. FIGS.
FIGS. 6A and 6B are a side view and a front view of a connection tool for explaining the shape of another connection tool used in the connection structure for formwork members according to the embodiment of the present invention.
FIGS. 7A and 7B are a side view and a front view of a connecting tool for explaining the shape of another connecting tool used in the connecting structure for formwork members according to the embodiment of the present invention.
FIGS. 8A and 8B are a side view and a front view of a connecting tool for explaining the shape of another connecting tool used in the connecting structure for formwork members according to the embodiment of the present invention.
FIGS. 9A and 9B are a side view and a front view of a connecting tool for explaining the shape of another connecting tool used in the connecting structure for formwork members according to the embodiment of the present invention. FIGS.
[Explanation of symbols]
13 Upper formwork (chin formwork)
21 Trapezoidal protrusion (protrusion)
22 connector 23 washer plate
24 Female thread 26 Fixing bolt (bolt)
C concrete

Claims (2)

In constructing a parapet by placing concrete in a chin mold that surrounds the chin-shaped part of the parapet in a lateral direction,
A protrusion having an inclined upper surface is provided on the inner surface side of the jaw mold, and has a surface that follows the shape of the upper surface of the protrusion. A connecting tool disposed on the protrusion, a clasp disposed on the outside of the jaw mold frame, and the coupling tool and the clasp inserted between joint ends of the jaw mold materials. The above-mentioned jaw mold materials are connected to each other by bolts that fasten the jaw mold materials so as to sandwich the jaw mold materials. 2. The formwork connection structure according to claim 1, wherein a female thread capable of screwing the bolt is formed on the connection tool and / or the clasp.

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