JP2007092403A - Outer form structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outer form structure capable of releasing an outer form from a concrete structure, movable, having excellent ease of work, and capable of suppressing the rise of cost. <P>SOLUTION: This outer form structure 1 molds the arch-shaped concrete structure by disposing the outer form structure on the outside of an inner form frame 2. The outer form structure comprises two split outer formes 10, 20 divided into two parts at a ceiling portion and having end faces 13, 23 releasably formed at the divided part of the ceiling portion, a connection means 30 releasably connecting the end faces 13, 23 of the two split outer forms 10, 20 to each other, wheels 40, 41 fitted to the lower ends of the split outer forms 10, 20, and rails 42, 43 installed on the lower sides of the wheels 40, 41. The both split outer forms 10, 20 are released from the concrete structure since its lower end is spread outward by its own weight when the connected state of the connection means 30 is released and the end faces 13, 23 of both split outer forms 10, 20 are slight separated from each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an outer mold structure for forming an arched concrete structure such as a tunnel or a warehouse on the outside of an inner mold.

The above-described outer form frame structure is generally configured to connect a number of panel plates in an arch shape (see, for example, Patent Document 1). The outer form structure having such a structure is not formed over the entire length when the concrete structure is long, but the assembly and disassembly of the panel plate is repeated for each predetermined length, and the concrete structure Is used to form the full length of It is known that the arch-shaped inner mold is movable along the rail by a moving mechanism composed of wheels and rails provided at both lower ends of the inner mold.
JP 2005-126918 A

  By the way, when assembling and disassembling a large number of panel plates in the outer mold structure as described above, the work is complicated and workability is poor, and a large loss occurs in time. Therefore, like the inner formwork, it is manufactured in a size and shape corresponding to a part of the length of the concrete structure by attaching a wheel to its lower end and providing a moving mechanism that can move on the rail. It is conceivable to use an outer formwork that has been made. However, even if a moving mechanism for the inner mold is similarly provided for such an outer mold, it is difficult to release the mold between the outer mold and the concrete structure.

  Therefore, a support structure for supporting the entire outer mold is provided outside the outer mold, and the outer mold itself is divided into an upper frame and a lower frame, and both are connected by hinges, and the lower frame is below the lower frame. An outer form structure having a configuration in which a cylinder is provided and a wheel is provided on the lower side of the cylinder has been proposed and used. In the case of this outer formwork structure, a wheel provided on the lower side of the lower frame after lifting the entire outer formwork with a journal jack and releasing the lower frame from the concrete structure by spreading the lower end outward. Can be moved through.

  However, in the case of the outer mold structure, there is a problem that the cost is significantly increased because the sturdy support structure is required outside the outer mold frame.

  The present invention has been made in order to solve the problems of the prior art as described above, and the outer mold can be released from the concrete structure and can be moved, and is excellent in workability. And it aims at providing the outer formwork structure which can suppress a raise of cost.

  An outer formwork structure according to claim 1 of the present invention is an outer formwork structure for forming an arch-shaped concrete structure by arranging it on the outside of the inner formwork, and is divided into two at the ceiling portion. Two half-outer molds provided so that the end faces of the split part can be brought into contact with and separated from each other; a connecting means for connecting the end faces of the two half-outer molds so as to be able to come into contact with and away from each other; It comprises a wheel provided at the lower end of the formwork, and a rail provided on the lower side of each wheel, loosens the connection state of the connecting means, and slightly separates the end faces of both outer half formwork, Both halved outer molds are configured so as to be released from the concrete structure with their own weights and their lower ends extending outward.

  The outer mold structure according to claim 2 of the present invention is the outer mold structure according to claim 1, wherein the connecting means is screwed to the turnbuckle having oppositely directed female screws at both ends and the female screw at one end. And a pair of rod members each having a male screw. The other ends of both rod members are supported so as to be swingable with respect to the respective half outer molds.

  In the case of the outer mold structure of the present invention, a concrete material is put between the outer mold frame and the inner mold frame in a state where the end faces of both half-split outer mold molds are in contact with each other by the connecting means. A structure can be manufactured. Moreover, when the end surfaces of both half-split outer molds are separated from each other by the connecting means, the both half-split outer molds are tilted so that the lower end side is spread outward by their own weight, and can be released from the concrete structure. Along with this release, both half-split outer forms can be moved along the rails via the wheels, and there is no need to repeat assembly and disassembly of the panel plate as in the prior art, and workability can be greatly improved. . Furthermore, since a large support structure for supporting the outer mold is not required outside the outer mold as in the prior art, an increase in cost can be suppressed.

  In the case of the outer form structure of claim 2, when the turnbuckle is rotated in the forward direction or the reverse direction, both rod members can be simultaneously tightened or loosened, thereby improving workability. . In addition, since the other ends of the both bar members are swingably supported by the outer half-frame, the screw bending force associated with the inclination of both outer half-frames acts on both the bar members and the turnbuckle. Can be prevented, and breakage of the connecting means can be prevented.

  The present invention will be specifically described below.

  FIG. 1 is a front view showing an outer formwork structure according to an embodiment of the present invention.

  The outer formwork structure 1 is for forming an arch-shaped concrete structure on the outside of the inner formwork 2 and can be moved in the front-rear direction via wheels described later in this embodiment. It is said.

  The inner mold 2 is formed in an arch shape slightly smaller than the outer mold structure 1 so as to correspond to the inner surface of the concrete structure, and the inner mold 2 is held in a predetermined shape on the inner side. The supporting skeleton 3 for the purpose is arranged vertically and horizontally. Wheels 5, 5 are rotatably provided at both lower ends 4, 4 of the support skeleton 3, and rails 6, 6 are laid on the foundation 8 in the front-rear direction below these wheels 5, 5. ing. Therefore, the inner mold 2 is also configured to be movable in the front-rear direction along the rails 6 and 6 via the wheels 5 and 5.

  The outer formwork structure 1 includes two half-outer formwork 10 and 20 that are divided into two at an arched ceiling. The left half outer mold 10 has a left frame integrally formed by connecting the upper end of the lower frame 11 and the lower end of the upper frame 12, and is used for forming a concrete structure inside the left frame. The formwork panel 10a is attached. The upper end portion of the upper frame 12 is in an open state where the panel 10a is not attached.

  One right outer half mold 20 also has a right frame integrally formed by connecting the upper end of the lower frame 21 and the lower end of the upper frame 22, and a concrete structure is placed inside the right frame. A formwork panel 20a for shaping is attached. Note that the upper end portion of the upper frame 22 is in an open state in which the attachment of the panel 20a is omitted.

  The upper end face 13 of the upper frame 12 of the outer half mold frame 10 and the upper end face 23 of the upper frame 22 of the half outer mold form 20 are in contact with each other through connecting means 30 provided along the ceiling portion. It can be separated. In FIG. 1, reference numeral 24 denotes a scaffold with a handrail provided outside the half-split outer formwork 10, 20. In addition, in this example, the half outer mold 10 and the half outer mold 20 are configured by combining the two frames of the lower frames 11 and 21 and the upper frames 12 and 22, but with one frame, Alternatively, it may be composed of three or more frames.

  FIG. 2A is a front view showing the connecting means, and FIG. 2B is a plan view (partial sectional view) thereof. As shown in FIG. 2, each connecting means 30 is a known member having a turnbuckle 31 and a pair of rod members 32, 33. The turnbuckle 31 has female screws 31a, 31b facing in opposite directions at both ends in the longitudinal direction. For example, the female screw 31a is formed as a left screw, and the female screw 31b is formed as a right screw. A ratchet 38 is provided outside the turnbuckle 31. The ratchet 38 has an insertion hole 38a into which an end of an operation rod (not shown) is inserted and a lever 39 for determining a force transmission direction. The operation rod is inserted into the insertion hole 38a in the longitudinal direction of the drawing. When the lever 39 is swung, the turnbuckle 31 is rotated only in one of the forward and reverse directions by switching the lever 39 to the near side or the far side in the figure.

  The bar member 32 has a male screw 32a screwed to the female screw 31a on one end side and a connecting hole 32b on the other end side of the bar member 32, and is formed on a support member 34 provided on the upper frame 12 side. Bolts are passed through the horizontal mounting holes 34a and the connection holes 32b, and supported by swinging nuts. Like the bar member 32, the bar member 33 has a male screw 33 a that is screwed to the female screw 31 b on one end side, and a connection hole 33 b on the other end side of the bar member 33. Bolts are passed through horizontal mounting holes 35a and connecting holes 33b formed in the provided support member 35, and are supported so as to be swingable by fastening with nuts. The support member 34 is fixed on a height adjustment member 36 provided on the upper frame 12, and the support member 35 is fixed on a height adjustment member 37 provided on the upper frame 22. ing.

  Therefore, in this connection means 30, when the turnbuckle 31 is rotated in one of the forward and reverse directions, both rod members 32 and 33 can be tightened or loosened simultaneously. When the rod members 32 and 33 are tightened, the upper end surface 13 of the half outer mold frame 10 and the upper end surface 23 of the half outer mold frame 20 come into contact with each other, and when the both rod members 32 and 33 are loosened, The upper end face 13 of the outside mold form 10 and the upper end face 23 of the half form part 20 are separated.

  A plurality of wheels 40 are provided in the front-rear direction at the lower end of the lower frame 11 of the half outer mold 10, and a plurality of wheels 41 are provided in the front-rear direction at the lower end of the lower frame 21 of the half outer mold 20. One is provided. Rails 42 and 43 are laid in the front-rear direction below the wheels 40 and 41.

  As shown in FIG. 3A, the wheel 40 is formed with an inner flange 40a and an outer flange 40b projecting radially on both sides in the axial direction. One wheel 41 is symmetrical to FIG. 3A, but is formed with an inner flange 41a and an outer flange 41b projecting radially on both sides in the axial direction. The inner flanges 40a and 41a are arranged on the upper end faces 13 and 23 side, and the outer flanges 40b and 41b are arranged on the opposite side.

  The wheel 40 is supported by a shaft 45 fixed horizontally to a support member 44 attached to the lower side of the lower frame 11 so as to be rotatable in the forward and reverse directions, and the inside of the cavity 44 a of the support member 44 is supported by the shaft 45. It can slide along. One of the wheels 41 is also supported by a shaft 47 that is horizontally fixed to a support member 46 attached to the lower side of the lower frame 21 so as to be rotatable in the forward and reverse directions. It can slide along 47.

  The distance between both flanges 40a, 40b of the wheel 40 is set to be larger than the width dimension of the rail 42. Similarly, the distance between both flanges 41a, 41b of the wheel 41 is also larger than the width dimension of the rail 43. It is set large.

  The outer mold structure 1 and the inner mold 2 of the present embodiment configured as described above are used as follows.

  The inner mold 2 is moved and positioned on one end side in the length direction of the concrete structure to be manufactured, and the outer mold structure 1 is moved and positioned outside the inner mold 2. A large number of separators 7 are provided across the inner mold frame 2 and the outer mold structure 1, and the distance between the outer surface of the inner mold frame 2 and the inner surface of the outer mold structure 1 is adjusted according to each part. At this time, as shown in FIG. 3A, the positional relationship between the wheels 40 and 41 and the rails 42 and 43 is such that the center in the axial direction of the wheels 40 and 41 is the center in the width direction of the rails 42 and 43. And the outer sides of the wheels 40, 41 are set so as to abut on the outer inner walls 44b, 46b of the support members 44, 46.

  In this state, a concrete material (for example, a mixture of cement, sand, pebbles, and water) is placed in the internal space between the inner mold frame 2 and the outer mold frame structure 1 to be hardened. A part of the structure is produced.

  Thereafter, the turnbuckle 31 of the outer mold structure 1 is rotated in a predetermined direction to loosen both the rod members 32 and 33, and the upper end face 13 of the half outer mold form 10 and the upper end face 23 of the half outer mold form 20 Separate. Then, since the center of gravity of each of the half-split outer molds 10 and 20 is located closer to the upper end faces 13 and 23 than the lower ends of the lower frames 11 and 21, the weights of the respective half-split outer molds 10 and 20 Inclined to spread the lower end side outward, and released from the concrete structure.

  At this time, as shown in FIG. 3 (b), the inner flanges 40 a and 41 a of the wheels 40 and 41 abut against the inner inner walls 44 c and 46 c of the support members 44 and 46 and the inner ends of the rails 42 and 43. The size which is expanded at the time of the mold release is regulated so as to be in contact with the mold. As a result, the lower ends of the outer half molds 10, 20 are further away from the side surface 8a of the foundation 8, and the distance from the side surface 8a is, for example, 55 mm to 108 mm in FIG. The frames 10 and 20 can be reliably released from the concrete structure.

  The two half-split outer frames 10 and 20 that have been released as described above are moved along the rails 42 and 43 via the wheels 40 and 41 by using a traction device (not shown), thereby providing a concrete structure. The next part of the object can be made. The inner mold 2 can be moved, for example, by loosening the support skeleton 3 and releasing it from the inner surface of the concrete structure.

  Therefore, in the case of the present embodiment, both the half-split outer molds 10 and 20 can be moved, so that it is not necessary to repeat the assembly and disassembly of the panel plate as in the prior art, and the workability can be greatly improved. Furthermore, since a large support structure for supporting the outer mold is not required outside the outer mold as in the prior art, an increase in cost can be suppressed.

  In the above-described embodiment, the inner mold is also movable through the wheels. However, the outer mold structure of the present invention is not limited to this, and may be applied to an inner mold that does not move without wheels. it can. This is because the inner mold in this case may be formed over the entire length of the concrete structure to be produced.

It is a front view showing an outer formwork structure concerning one embodiment of the present invention. The connection means with which the outer form-frame structure of FIG. 1 was equipped is shown, (a) is the front view, (b) is the top view (partial sectional view). (A) And (b) is explanatory drawing of the positional relationship of a wheel and a rail.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer frame structure 2 Inner mold frame 10, 20 Half split outer mold frame 13, 23 Upper end surface 30 Connection means 31 Turnbuckle 32, 33 Bar member 31a, 31b Female screw 40, 41 Wheel 42, 43 rail of reverse direction

Claims (2)

In the outer formwork structure for forming an arched concrete structure by arranging it on the outside of the inner formwork,
Two half outer molds that are divided into two at the ceiling and each end face of the divided part is provided so as to be able to contact and separate;
Connecting means for connecting the end faces of the two half-split outer molds so as to be able to contact and separate;
Wheels provided at the lower end of each half-split outer formwork,
Comprising a rail provided under each wheel,
By loosening the connection state of the connecting means and slightly separating the end faces of both half-split outer molds, both half-split outer molds are spread by their own weight and their lower ends spread outwards against the concrete structure. An outer mold structure characterized by being configured to be released from the mold. In the outer mold structure according to claim 1,
The connecting means has a turnbuckle having female screws opposite to each other at both ends, and a pair of rod members having male screws screwed to the female screws at one end, and the other ends of the both rod members are separated from each other by half. An outer mold structure which is supported so as to be swingable with respect to the mold.

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