JP4888490B2 - Connecting rod for formwork - Google Patents

Description

  The present invention relates to a mold (injecting a liquid filler into a filling space of a mold like concrete and solidifying the filling to form a building material of a predetermined shape), particularly a filling space of a concrete mold. The present invention relates to a connecting rod for connecting between mold facing portions to be formed. More specifically, the present invention relates to a connecting rod having an intermediate portion, which is configured to form an interval holding surface that contacts and supports a filling space forming surface inside the mold so that a predetermined distance is maintained between both sides of the mold. .

  In the following, the solidifying filler is described as concrete by way of example, and in the present specification, the words of the filling process relating to filling and solidifying concrete are used. However, the present invention is not limited to the concrete formwork, and other solidifications are used. The present invention relates to a general formwork used when injecting fillers as building materials.

  To fix the formwork in place when pouring concrete, that is, for example, two opposing surfaces that define the wall when plastic concrete that is poured into the formwork is supported and the formwork is loaded by the pressure It is necessary to use a connecting rod so that the distance of the formwork does not change. The connecting rods are mounted at regular intervals when viewed relatively, and fix the opposing formwork members spaced apart by the dimension of the connecting rods. At the same time, the connecting rod extends to the outside of the mold and is fixed by a wedge-shaped member to a fastening portion provided at the tip of the rod.

The conventional connecting rod is made of iron and includes a plastic spacer arranged so as to press the inner wall surface of the mold part, and is slid on the connecting rod and fixed at a position on the shaft in the manufacturing process. Each spacer presses a portion corresponding to an enlarged portion of the connecting rod or an enlarged portion. When the concrete is set and the formwork is removed, the protruding end of the connecting rod is folded at the weak part where the spacer is located. The crack at the folded portion is exposed on the wall surface, and the spacer is often dropped because it has a conical shape with a large area facing the outside. Then, in order to cover the crack or to fill the hole of the spacer, it is necessary to coat each connecting rod portion on the wall surface with a trowel. This is cumbersome and expensive.
The biggest drawback of the prior art is that the connecting rod, more precisely the connecting rod remaining inside the concrete structure, becomes the entrance for moisture. Moisture penetrates into the concrete structure and comes into contact with the reinforcing material that is partially or directly in contact with the connecting rod. The reinforcing material corrodes, the reinforcing strength is weakened, the adhesive strength between the concrete and the reinforcing material is weakened, and the corroded iron (rust) is increased compared to the non-corroded iron, and the concrete is scraped off. Corrosion also occurs on the connecting rod.

  Even in a situation where the concrete structure is not in direct contact with water, the connecting rod functions as a cold heat transfer body due to the thermal characteristics of iron, so that there is a drawback that the temperature gradient in the cross section of the concrete structure becomes violent and moisture condensation tends to occur. Various maintenance problems are brought about due to the rust formed on the connecting rod by the condensed water and the water in the concrete.

  Even in a concrete structure where rain should be blocked or stored, that is, moisture should be prevented from entering and exiting, it is often a source of leakage along the connecting rod, particularly due to poor adhesion between iron and concrete.

  Another problem with the prior art is that the connecting rod cannot be accurately positioned in the axial direction when the reinforcing material is directly disposed on the connecting rod. In the prior art, there is no means for accurately arranging in the rod axis direction.

  Patent Document 1 (US Pat. No. 3,430,914) discloses a metal mold connecting rod provided with a spacer member having a diabolo (Chinese sesame) shape, and an outer portion of the spacer member is removed as necessary. It ’s a diabolo shape so you wo n’t accidentally lose it from the wall. A resin plug that closes the central hole of the spacer member after the rod is removed by a known method is also disclosed. Also disclosed are conical plugs made of wood or ceramic. However, there is a drawback as described above in that such a rod also corrodes.

Patent Document 2 (NO19980475) discloses a formwork connecting rod that provides good adhesion to a finished mortar when one or more planes are provided on the circumferential surface of a resin spacer to seal the gap between the spacers. Has been. However, this rod has the above-mentioned problem in terms of corrosion.
US 3,430,914 NO19980475

  The object of the present invention is to remedy or reduce at least one of the disadvantages of the prior art.

  The above object can be achieved by the features described in the specification and the claims.

  The present invention relates to a connecting rod formed of a corrosion-resistant material, preferably a composite material, and includes an intermediate portion having a rod orthogonal surface arranged so as to be supported on the inside of a mold portion on the outer side in the axial direction and a rod shaft body. It becomes a continuous configuration. The middle part has not only the rod orthogonal surface on the outside, but also includes support parts and fixing parts for other building materials, and also improves the adhesion to surrounding concrete and the possibility of moisture entering along the connecting rod. A mitigating member is also provided. After removing the formwork, the protruding rod may be cut at an arbitrary position with a tool suitable for cutting such as cutting pliers.

The connecting rod according to the invention has improved properties in several respects.
-Formwork connecting rods remaining in the concrete structure are not damaged by corrosion.
-The continuous rod rod connection structure has good adhesion to the surrounding concrete and does not allow moisture to penetrate or penetrate the concrete structure through the path along the rod. Can provide a concrete structure with increased moisture sealing properties and a reduced risk of rusting the rebar.
Further, the intermediate portion of the connecting rod can be formed to be a component for positioning and fixing the plate-like reinforcing material and the internal heat insulating material at a minimum cost.
Furthermore, the intermediate portion of the connecting rod is formed with a member that is fixed in the rod radial direction, so that the connecting rod does not come off from the surrounding solid concrete even when a rotational force is applied. Further, the through plug formed by the remaining portion of the connecting rod functions as a fixing member for installing an external building material. The through shaft body of the rod is preferably attached with a screw, for example.
Further, by reducing the thermal conductivity of the rod material as compared with the thermal conductivity of the concrete structure, moisture condensation of the connecting rod can be prevented.
Further, the projecting end of the connecting rod may be used for attaching an external building material such as a plate-like heat insulating material. Such a building material slides on the projecting end portion and is fixed by a fixing member, and a surplus portion is cut.
Therefore, even if the mold is removed, the connecting rod does not need a portion that needs to be repaired such as falling from the filling tissue and filling a hole with a mortar using a trowel or inserting a plug.

  The fixing member for fixing the building material to the connecting rod is also preferably made of a corrosion resistant material.

  More specifically, the present invention relates to a connecting rod for connecting the opposing side wall portions of the filling mold frame, and includes an intermediate portion and two rods on both axial ends of the intermediate portion. The intermediate part and the transition part of the rod have a rod orthogonal surface that supports (presses) and supports the inside of at least one side wall part, and the side wall part of the filling mold frame is fixed from the back side on the rod end side. The connecting rod has a shaft body with a high extension strength formed as a rod on both axial ends of the intermediate portion (through the intermediate portion). The rod-forming part of the shaft body has an outer surface surrounded by a mantle, and the intermediate part and the mantle of the shaft body are formed to have a continuous structure. Is characterized by being made of a corrosion resistant material.

  Preferably, the connecting rod is formed of a composite material, and the shaft body is formed of a reinforcing fiber material that is fiber reinforced in the axial direction of the connecting rod.

  It is beneficial to form the mantle and the middle part of the same kind of composite material.

  As for a mantle and an intermediate part, it is preferable to integrally couple | bond the raw material which forms a mantle, and the raw material which forms an intermediate part by fusion | bonding. Or you may couple | bond with an adhesive agent.

  It is preferable that the intermediate portion is provided with an engaging means that engages the surrounding solidifying filler in an inseparable manner when the filler is poured into the mold and hardened.

Advantageously, the intermediate part and the shaft in the intermediate part are formed as a through plug that is waterproof and unseparated when the filled solidified structure (concrete) is complete.
As a result, when the middle part is fixed in the solidified filler for filling and becomes anchor points (form anchoring points), the airtightness of the concrete and the connecting rod is kept high, and moisture is passed through the gap between the rod and the concrete. It can be made of a corrosion-resistant material, preferably a composite material, so that it does not penetrate into the concrete and damage the concrete and further prevents moisture from accumulating at the end of the connecting rod.

  The rod orthogonal surface is preferably formed in an intermediate portion that becomes a cross-sectional enlarged portion (a portion where the cross-section is enlarged toward the filling space forming surface on the opposite side of the intermediate portion) that is spread to an adjacent portion.

  It is preferable that at least one intermediate part is not circular in the cut surface of the direction orthogonal to the central axis of a connecting rod.

  Moreover, it is preferable that the intermediate portion includes a plurality of concentrically expanded portions on the cut surface.

  The intermediate portion includes an endless groove that supports one or a plurality of fixing means for fixing a plate-shaped building material such as a heat insulating material, and the endless groove is fitted and complementarily disposed with a part of the fixing means. It is preferable.

  The fastening means is preferably made of a corrosion resistant material.

  Advantageously, the intermediate part of the connecting rod comprises one or more means arranged to support reinforcing means for reinforcing the concrete, which means is preferably one or more endless grooves.

  The endless groove preferably has a trapezoidal cross section in which the bottom side of the groove is a short side, and the side end side of the groove has the same inclination angle with respect to the central axis of the connecting rod.

  It is preferable that the intermediate portion of the connecting rod is provided with one or a plurality of reinforcing means fixing portions for fixing the position of the reinforcing means.

  Preferably, the fixing means for fixing the reinforcing means is formed of a corrosion-resistant material.

  It is preferable that the rod is configured such that one or a plurality of protective disks for fixing a plate-shaped building material such as a heat insulating material is attached.

  The protective disk preferably comprises means for releasably connecting with the mantle surface of the rod.

  The fixing disk preferably includes a plurality of elastic tongue-shaped portions extending in the radial direction from the circumferential portion toward the central opening.

  Preferably, the fixing disk is made of a corrosion resistant material.

  It is preferable that the thermal conductivity of the connecting rod is lower than the thermal conductivity of the surrounding solidified packed product.

  Described below are preferred embodiments depicted in the accompanying drawings, and the present invention is not limited thereto.

  The connecting rod 1 includes a shaft body 2 covered with a mantle 2a, an intermediate portion 3, and two rods 5a and 5b. In the transition part from the intermediate part 3 to the rods 5a, 5b, the intermediate part faces the cross-sectional enlarged part 7a, and the cross-sectional enlarged part 7a has the rod orthogonal surface 7.

  The connecting rod 1 is formed of a composite material, and the shaft body 2 is reinforced by a known method with a highly extensible fiber material and is surrounded by a binding material that forms a mantle 2a. The intermediate part 3 may be formed of the same material as the mantle 2a.

  In the first embodiment shown in FIG. 1, the cross-sectional enlarged portion has a truncated cone shape, and the bottom surface 7 b faces the intermediate portion 3. The central axis of the cone is coaxial with the central axis of the connecting rod 1. The conical upper surface faces the adjacent rods 5 a and 5 b, and is arranged in a direction perpendicular to the central axis of the connecting rod 1 to form a rod orthogonal surface 7. The bottom surface 7b is non-circular, and is arranged so that the four cut surfaces 7c are connected to the side surface 7d in parallel to the central axis of the connecting rod 1 in the direction toward the rod orthogonal surface 7. The cut surface 7c is parallel to each other at two locations facing each other, and the bottom surface 7b is a square with a corner.

  In another embodiment shown in FIG. 6, the rod orthogonal surface 7 is in the form of a first four-armed cross 57b. A second four-arm cross 57a with a longer arm length is formed at a distance from the first cross 57b, and the four ribs 58a project radially oppositely (diametrically opposite). And extend between the arms 59a, 59b of the cross-shaped 57a, 57b in the axial direction. Furthermore, in this embodiment, a plurality of circular cross-sectional enlarged portions forming the fixing and sealing ribs 58b are concentrically arranged.

  When the intermediate portion 3 is coupled so as to be in close contact with the shaft body 2, the path from the shaft body 2 to the intermediate portion 3 is firmly connected, so that a liquid such as water is transferred from the end portions 5a and 5b to the intermediate portion. Cannot enter 3 in the axial direction. The ends of the material of the mantle 2a and the intermediate part 3 in the product can be fusion-bonded to each other, or the shaft body 2 and the intermediate part 3 can be firmly connected by waterproofing using, for example, glue.

  A projecting rest 9 for engaging the wedge-shaped tool 11 for fixing the back sides 23a and 23b of the mold 21 is provided on the outer side of either of the rods 5a and 5b.

  The intermediate portion 3 is provided with a plurality of endless grooves 3a that circulate around the periphery thereof, and is arranged to receive a fixing disk 13 that positions and fixes a plate-like driving material 15 such as a heat insulating material.

  The fixing disk 13 is configured such that a U-shaped partial opening 13a directed from the outer periphery toward the center is guided to a circular center hole 13b positioned substantially at the center, and preferably moves in the radial direction to fit into the intermediate portion 3. The thickness of the fixing disk 13 is set such that at least the central hole 13b can be press-fitted into the side end of the groove 3a of the intermediate portion 3 so that the fixing disk 13 does not fall off after being fitted to the connecting rod 1. Alternatively, the outer edge portion of the center hole 13b is press-fitted into the bottom surface of the groove 3a.

  The intermediate portion 3 is also provided with a plurality of grooves 3b, is formed as an endless groove that goes around the periphery of the intermediate portion, and has an outer shape that supports the reinforcing means 25 such as a reinforcing bar that crosses the groove. Use a trapezoid.

  The connecting rod 1 is advantageously provided with a protective disk 17. The protective disk 17 is fixed to the rods 5a and 5b which protrude from the solidifying filler 31 such as a concrete wall and are cut after the mold 21 is removed. The protective disk 17 includes a plurality of elastic tongues (fingers) 17a oriented in a radial direction from the circumferential part 17b toward the central opening part 17c. The tongue pieces (fingers) 17a extend from the central opening part 17c. A slot 17d extending in the radial direction toward the circumferential opening 17e of the circumferential portion 17b of the protective disk is separated from an adjacent tongue piece (finger). The diameter of the central opening 17c is made shorter than the diameters of the end portions 5a and 5b so that the protective disk 17 receives the elastic (tensile) force of the plurality of tongue pieces 17a and stays at a predetermined position of the rods 5a and 5b.

  At least the protruding portion 9 of the connecting rod 1 and the shaft 2, that is, the core passing through the centers of the rods 5 a and 5 b and the intermediate portion 3 are made of a composite material having extension strength, and the connecting rod 1 of the mold 21 It has an elongation strength that is strong enough to absorb the tension load applied during the injection of the solidifying filler 31 such as or concrete from the gaps in the formwork. Composite materials include fiber reinforcements and binder materials that are impervious to water and do not corrode. The intermediate part 3 and the shaft body 2 are formed of a material suitable for fixing a fastening member such as a nail or a screw. The rods 5a and 5b are configured to be cut with a suitable tool at any position between the protruding portion 9 and the rod orthogonal surface 7.

  You may form the connection rod 1 whole provided with the protrusion part 9 and the intermediate part 3 in one formation process.

  The fixed disk 13 and the protective disk 17 are preferably formed of a corrosion-resistant material such as a plastic material.

  The connecting rod 1 is installed by a known method during the formation of the mold 21. After attaching the side part 23a, the reinforcing means 25 is placed and fixed to the mold 21 mutually. When the heat insulating material 15 is to be fitted, after fixing with the fixing disk 13, the opposite side portion 23 b is attached, the wedge-shaped tool 11 is attached to the protruding portion 9 of the connecting rod 1, and the connecting rod is tightened to form the mold. The frame can be fixed. When tightening, the rod orthogonal surface 7 is supported by the inner side surfaces 23c of the side portions 23a and 23b of the mold 21.

  After the solidification filler 31 such as concrete is filled in the mold and solidified, the mold 21 is removed by a known method, and the protruding rods 5a and 5b are cut.

  When the rods 5a and 5b are used to fix the plate-shaped building material 33 such as a heat insulating plate to one or both side surfaces of the completed filled tissue, the protruding portion 9 and the rods 5a and 5b are cut to an appropriate length. After that, the protective disk 17 is slid on the rods 5a and 5b and fixed adjacent to the plate member 33.

  When the building material is fixed with screws, nails or the like, the fastener is tightened and fixed from the center of the rod orthogonal surface 7 having the same height as the outer surface of the cast structure 31 formed by cutting the shaft body 2 to the intermediate portion 3. . Due to the length of the intermediate portion 3 extending continuously in the axial direction and the partial cut surface being non-circular, the solidified filler 31 is firmly fixed both in the axial direction and in the radial rotation direction.

  Depending on the selection of the material, the connecting rod does not corrode and water does not enter the reinforcing material and the solidified filling body. The means 3a, 3b, and 13 can adjust the position of the heat insulating material 15 and the reinforcing material 25 more accurately in the solidified filling body, and the quality of the cast structure is improved by using the material more effectively.

  If the connecting rods 5a and 5b and the intermediate rod orthogonal surface 7 are used when an external building material is attached, the connecting rod 1 has a more preferable function.

It is a perspective view of the connecting rod of the present invention. It is an expansion perspective view of the disk for fixation used for the connecting rod of the present invention. It is a perspective view of the protection disk used for the connecting rod of this invention. It is the scale perspective view of the mold which assembled a part, and the connecting rod connects the opposing surface of a mold, and positions reinforcing iron material and a heat insulating material. It is a scale view of the concrete wall member completed by providing the isolation material (heat insulating material) on the side and fixing with the connecting rod of the present invention. It is a perspective view of the other Example of the connecting rod intermediate part by this invention.

Claims (23)

A mold that is used in a mold (21) that forms a building material having a predetermined shape by injecting a liquid filler into a filling space of a mold like concrete and solidifying the filling, and facing the mold through the filling space. A connecting rod for connecting the pair of side wall portions (23a, 23b) of the frame, the connecting rod comprising an intermediate portion (3) and rods (5a, 5b) at both axial ends of the intermediate portion. At least one rod orthogonal surface (7) located at the transition between the intermediate portion (3) and each rod (5a, 5b) is a filling space forming surface (23c) inside the side wall portions (23a, 23b). And a locking portion (9) for engaging a wedge-shaped member (11) that fixes the side wall portions (23a, 23b) of the mold (21) to the ends of the rods (5a, 5b). In the connecting rod (1) with
The connecting rod (1) has a shaft body (2) having strong elongation formed as rods (5a, 5b) on both axial ends of the intermediate portion. The outer surface is surrounded by 2a), and the intermediate portion (3) and the mantle (2a) of the shaft body (2) are formed to have a continuous structure. The mantle (2a) and the intermediate portion (3 ) Is a connecting rod (1), characterized in that it is made of a corrosion-resistant material.   The connecting rod (1) according to claim 1, wherein the members constituting the connecting rod (1) are made of a composite material.   The connecting rod (1) according to claim 1 or 2, characterized in that the shaft body (2) is formed from a reinforcing fiber material which is fiber-reinforced in the axial direction of the connecting rod (1).   The connecting rod (1) according to claim 1 or 2, wherein the mantle (2a) and the intermediate part (3) are made of the same kind of material.   The connecting rod (1) according to any one of claims 1 to 4, wherein the mantle (2a) and the intermediate portion (3) are integrally joined together by melt bonding. 1).   The connecting rod (1) according to claim 1, wherein the mantle (2a) and the intermediate part (3) are bonded and bonded together with an adhesive.   In the intermediate portion (3), means (7c, 7d) for allowing the intermediate portion (3) and the surrounding solidifying filler to engage with each other when the solidifying filler is poured into the mold and solidified. 57a, 57b, 58a, 58b), the connecting rod (1) according to claim 1.   The intermediate part (3) and the shaft passing through the intermediate part (3) are integrally formed as a through plug means so as not to leak water in the completed solidified structure (31). The connecting rod (1) according to 1.   The rod orthogonal surface (7) is provided with a portion (7a, 57b) which is formed on the intermediate portion (3) side and whose cross section is enlarged toward the filling space forming surface on the opposite side. Item 1. A connecting rod (1) according to item 1.   The connecting rod (1) according to claim 1, characterized in that at least one part of the cut surface of the intermediate part (3) when cut in a direction orthogonal to the central axis of the connecting rod (1) is non-circular. .   The connecting rod (1) according to claim 1, characterized in that the intermediate part (3) comprises a plurality of locations (58b) where the cross section expands concentrically.   The intermediate portion (3) includes an endless groove (3a) that supports one or more fixing means for fixing the plate-shaped building material (15) such as a heat insulating material in the radial direction and the axial direction. The connecting rod (1) according to claim 1, wherein 3a) is used by being fitted with a part of the fixing means (13).   Connecting rod (1) according to claim 12, characterized in that the fixing means (13) are made of a corrosion-resistant material.   The intermediate portion (3) of the connecting rod (1) is provided with one or a plurality of support means (3b) for supporting reinforcing means (25) for reinforcing the solidified filler. Connecting rod (1).   The connecting rod (1) according to claim 1, wherein the supporting means is one or a plurality of endless grooves (3b).   The endless groove (3b) has a trapezoidal cross section with a minimum width at the bottom, and the side wall surface is inclined at the same angle with respect to the central axis of the connecting rod (1). The connecting rod (1) as described.   The connection according to claim 1, characterized in that the intermediate part (3) of the connecting rod (1) is provided with one or more reinforcing means fixing parts for fixing the position of the reinforcing means (25). Rod (1).   The connecting rod (1) according to claim 17, characterized in that the reinforcing means fixing part is made of a corrosion-resistant material.   The said rod (5a, 5b) is comprised so that the 1 or several protection disk (17) for fixing plate-shaped building materials (33), such as a heat insulating material, may be attached. Connecting rod (1).   20. Connecting rod (1) according to claim 19, characterized in that the protective disk (17) comprises means (17a) for removably connecting to the mantle surface of the rod (5a, 5b).   The connecting rod (1) according to claim 19, characterized in that the protective disk (17) is provided with a plurality of elastic tongue members extending radially from the circumferential portion (17b) toward the central opening (17c). .   20. Connecting rod (1) according to claim 19, characterized in that the protective disk (17) is made of a corrosion-resistant material.   The connecting rod (1) according to claim 1, characterized in that the thermal conductivity of the connecting rod (1) is lower than the thermal conductivity of the surrounding solidified filler.

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