JP2014125800A - Auxiliary tool for concrete form assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an auxiliary tool capable of facilitating a work for installing a post-installation form plate 12 so as to make a tip screw shank 9b of a separator 5 fixed to a prescribed position insert through a through-hole 13 provided in the post-installation form plate 12.SOLUTION: An auxiliary tool 17 is externally fitted onto a screw shank 9b of a separator 5 for a form assembly equipped with the screw shank 9b at its end, the screw shank 9b being to be inserted into a through-hole 13 provided in the form plate 12. A bottomed hole 20 into which the screw shank 9b is detachably inserted from one end of a synthetic resin shaft-like body 18 is concentrically provided, and the other end of the shaft-like body 18 is formed in a conical shape with a diameter reducing toward its tip. A magnet 19 attracted to the front end face of the screw shank 9b is disposed on the bottom of the bottomed hole 20.

Description

  The present invention relates to a concrete formwork assembling tool for facilitating the work of assembling a formwork plate with respect to the other end portion of a separator whose one end portion is previously fixed at a predetermined position when assembling a concrete formwork. Is.

  The concrete formwork is for forming a concrete placement space. For example, when a concrete placement space is formed between concrete formwork plates, the concrete formwork is placed on a previously installed formwork plate at a predetermined position. Is a separator for fixing a formwork plate installed later (hereinafter abbreviated as a rear-installed formwork plate) in a fixed position and restricting a concrete placing space width with the installed formwork plate. It is attached at a predetermined interval. Accordingly, the post-installed form plate is provided with a through hole in accordance with each separator position marked by being pressed against the tip of the separator, and the tip screw shaft portion of the separator is inserted into each through hole. The post-installed mold plate is disposed at a predetermined position, and the mold fastener is screwed to the tip screw shaft portion of each separator projecting from each through-hole of the post-installed mold plate. Is fixedly supported by the separator. In this way, when assembling the concrete formwork, the rear screw shafts of the separators attached to the installed formwork plate are inserted through the through holes provided in the preinstalled formwork plate in advance. As the auxiliary tool for facilitating the operation of installing the installation mold plate after that, as described in Patent Document 1, the tip screw shaft of the separator is installed. 2. Description of the Related Art An auxiliary tool is known in which the other end portion of a shaft-like main body that is concentrically provided from one end with a hole that can be externally fitted to the portion is formed in a conical shape with a smaller diameter toward the tip.

Japanese Patent Laid-Open No. 9-4224

  According to the conventional well-known assisting tool as described above, as long as the conical tip of the assisting tool is located in the area of the through hole of the rear-installing mold plate, the rear-installing mold plate is moved to the separator side. It is possible to securely insert the tip screw shaft portion of each separator into the through-hole of the rear-installed form plate using the auxiliary tool as a guide. It must be one that does not easily fall off from the tip of the separator. Therefore, the hole of the auxiliary tool can be relatively easily inserted into the tip screw shaft portion of the separator, but the inner diameter is set so that an appropriate pulling resistance is obtained between the hole and the tip screw shaft portion of the separator. It must be highly accurate. If the accuracy of the inner diameter of this hole is low, the auxiliary tool can easily fall off from the tip screw shaft portion of the separator during operation, or conversely, a large pressure input is required to attach the auxiliary tool to the tip screw shaft portion of the separator. In any case, the smooth execution of the work is hindered.

  The present invention proposes a concrete formwork assembling aid that can solve the conventional problems as described above, and the concrete formwork assembling aid according to the present invention is an embodiment described later. In order to make it easier to understand the relationship, the reference numerals used in the description of the embodiment are shown with parentheses, and the through holes (13) provided in the formwork plate (12) at the ends are shown. An auxiliary tool (17) externally fitted to the screw shaft portion (9b) of the separator (5) for assembling a mold having a screw shaft portion (9b) inserted from the inside. A bottomed hole (20) into which the screw shaft portion (9b) is removably inserted is provided concentrically from one end of the main body (18), and the other end portion of the shaft-shaped main body (18) is The bottom end of the bottomed hole (20) is formed with a magnet (19) that is attracted to the front end surface of the screw shaft portion (9b). .

  According to the present invention, the front end screw shaft portion of the separator can be easily inserted into the through-hole of the rear-installed form plate using the conical portion at the front end of the shaft-shaped main body that is externally fitted to the front end screw shaft portion of the separator. Therefore, the installation work of the post-installed form plate can be easily and efficiently performed. In addition, according to the configuration of the present invention, the inner diameter of the bottomed hole provided in the shaft-like main body, into which the tip screw shaft portion of the separator is removably inserted, is inserted into the bottomed hole. The shaft-shaped main body is held on the tip screw shaft portion of the separator by the resistance between the bottomed hole and the tip screw shaft portion of the separator to the extent that it can be easily inserted without press-fitting. Even if it is formed so large that it can not be formed, as long as the tip screw shaft of the separator is inserted into the bottomed hole of the shaft-shaped body, the magnet embedded in the bottom of the bottomed hole and the tip of the separator The tip end surface of the screw shaft portion is adsorbed, and this magnetic attraction force securely holds the shaft-like body on the tip screw shaft portion of the separator. Therefore, although it is very easy to attach to the separator tip screw shaft portion, high accuracy is not required, so that it can be carried out easily and inexpensively. Further, when the rear installation form plate is installed at a predetermined position, the auxiliary tool (shaft-shaped main body) protruding from the rear installation form plate can be simply pulled by a force that overcomes the magnetic attraction force. The auxiliary tool can be removed from the tip screw shaft and reused.

1A is a partially longitudinal side view showing a state in which one end of a separator is attached to an existing mold plate, and FIG. 1B shows a state in which a rear installation form plate is attached to the other end of the separator in FIG. 1A. It is a partially vertical side view. FIG. 2 is a partially longitudinal side view showing the relationship between the post-installed form plate and the separator in a state where the auxiliary tool is not used. 3A is a longitudinal side view of the assisting device of the present invention, FIG. 3B is a front view of the assisting device, and FIG. 3C is a partially longitudinal side view showing a state in which the assisting device is attached to the tip screw shaft portion of the separator. is there. 4A is a partially longitudinal side view showing the relationship between the post-installed formwork plate and the separator in a state where the auxiliary tool of FIG. 3 is used, and FIG. 4B is a part showing a state when the auxiliary tool is removed after use. It is a vertical side view.

  FIG. 1 shows a formwork structure when a concrete placement space 3 is formed between concrete molds 1 and 2 on both sides. One concrete formwork 1 includes a formwork plate 4, a separator 5, a mold It is comprised from the frame fastener 6, the horizontal butterfly material 7 contact | abutted on the outer surface of the formwork board 4, and the vertical butterfly material 8 contact | abutted in the direction orthogonal to the outer side of the horizontal butterfly material 7. FIG. The separator 5 is made of a magnetic metal having screw shaft portions 9a and 9b at both ends and mold plate receiving washers (cup type washers in the illustrated example) 10a and 10b inside the screw shaft portions 9a and 9b. The screw shaft portion 9a at one end is inserted into the through hole 11 provided in the mold plate 4 from the inside, and the mold plate 4 by the mold plate receiving washer 10a on the same side. Take it. The formwork fastener 6 is screwed into a screw shaft portion 9a of the separator 5 protruding outward from the formwork plate 4, and is a rod-like shape that holds and fixes the formwork plate 4 with the washer 10a for receiving the formwork plate. It is comprised from the main body 6a and the fastening member 6b which fastens the outer side vertical butterfly material 8 to the form plate 4 side by fitting to this rod-shaped main body 6a.

  The other concrete mold 2 is assembled using the separators 5 protruding from the inside of the mold plate 4 in the concrete mold 1 assembled and installed at a predetermined position as described above. 4 is formed so that a concrete placement space 3 is formed between the through hole 13 and the form plate 12 is provided with through holes 13 in advance according to the positions of the separators 5. ing. Each through hole 13 marks the position of each separator 5 on the inner surface of the mold plate 12 by bringing the mold plate 12 into contact with the tip of the separator 5 of the concrete mold 1 and hitting it with a hammer from the outside. However, it is drilled at the position of each mark.

  Thus, the tip screw shaft portion 9b of each separator 5 protruding from the inside of the mold plate 4 in the concrete mold 1 is inserted into each through hole 13 provided in the mold plate 12, and The mold plate 12 is installed so that the mold plate 12 abuts on the mold plate receiving washer 10b located inside the tip screw shaft portion 9b, and the separator 5 that protrudes outside the mold plate 12 is provided. The rod-shaped main body 14a of the mold fastener 14 is screwed to the tip screw shaft portion 9b, and the mold plate 12 is sandwiched and fixed between the mold plate receiving washer 10b. Thereafter, as in the assembly of the concrete mold 1, the horizontal flap material 15 and the outer side of the mold plate 12 are formed on the outside of the mold plate 12 by using the fastening member 14 b fitted to the rod-shaped main body 14 a of the mold fastener 14. The concrete formwork 2 is assembled by assembling the vertical butter material 16.

  In addition, the outer formwork structure of the formwork plates 4 and 12 of the concrete formwork 1 and 2 is an example, and the structure of the formwork fasteners 6 and 14 and the arrangement of the butter materials 7, 8, 15, and 16 Of course, it is not limited to what is shown. For example, in the illustrated example, as the mold fasteners 6, 14, a screw type that fastens the fastening members 6 b, 14 b to the mold plate 4, 12 side by fastening nuts 6 c, 14 c that are screwed into the rod-like main bodies 6 a, 14 a. However, a wedge-type mold fastener that fastens the butter materials 8 and 16 to the mold plates 4 and 12 by a wedge plate can also be used.

  The concrete placement space 3 between the concrete molds 1 and 2 assembled as described above is composed of the mold plates 4 and 12. As shown in FIG. 2, the through holes 13 provided in the mold plate 12 so as to correspond to the positions of the separators 5 are more constant than the outer diameter d of the tip screw shaft portion 9 b of the separator 5 inserted into the through holes 13. A hole having an inner diameter D1 that is larger than the dimension is formed. For example, when the outer diameter d of the tip screw shaft portion 9b of the separator 5 is 7.8 mm, the inner diameter D1 of the through hole 13 is set to about 12 mm with a margin of about diameter difference = 4.2 mm. In this case, if the deviation of the axis of the separator 5 (tip screw shaft portion 9b) with respect to the shaft center of the through hole 13 is within the range of 2.1 mm in the radial direction, the tip screw shaft portion 9b is inserted into the through hole 13. However, when there is a deviation amount exceeding 2.1 mm in the radial direction, the tip screw shaft portion 9 b cannot be inserted into the through hole 13.

  Next, the auxiliary tool according to the present invention will be described. As shown in FIG. 3, the auxiliary tool 17 of the present invention includes a shaft-shaped main body 18 and a magnet 19 made of synthetic resin. The shaft-shaped main body 18 is a conical portion 18a having a smaller diameter from the middle to one end of the length, and the diameter of the conical portion 18a is opposite to the side where the tip 18b is located. A bottomed hole 20 is formed concentrically from the end face. The magnet 19 has a cylindrical shape with a diameter smaller than the inner diameter of the bottomed hole 20 and is concentrically embedded and fixed to the bottom of the bottomed hole 20, and one end surface 19 a of the magnet 19 is exposed in the bottomed hole 20. doing. The bottomed hole 20 of the auxiliary tool 17 has an inner diameter that is the same as or slightly larger than the diameter of the tip screw shaft portion 9b of the separator 5, as shown in FIG. 3C. The tip screw shaft portion 9b is slightly shorter than the entire length.

  The auxiliary tool 17 is placed on the tip screw shaft portion 9b of each separator 5 in a state of protruding from the existing mold plate 4 of the concrete mold 1 before the post-installed mold plate 12 is installed. That is, when the auxiliary tool 17 is put on the tip screw shaft portion 9b of each separator 5 so that the tip screw shaft portion 9b of each separator 5 is inserted into the bottomed hole 20, the one end surface 19a of the magnet 19 and the tip of the separator 5 are covered. The auxiliary shaft 17 is held by the front end screw shaft portion 9b of the separator 5 by adsorbing the front end surface of the screw shaft portion 9b to each other by magnetic force. Thus, after the auxiliary tool 17 is put on and held by the tip screw shaft portions 9b of all the separators 5, the rear installation mold plate 12 is placed in the through holes 13 on the rear installation mold plate 12 side. Install to be inserted. In this case, the diameter of the bottomed hole 20 of the auxiliary tool 17 is adjusted to the outer diameter d = 7.8 mm of the tip screw shaft portion 9b of the separator 5, and the outer diameter d2 of the large diameter portion provided with the bottomed hole 20 is set to 8. If the outer diameter d3 of the tip 18b is about 1 mm, as shown in FIG. 4A, the inner diameter D2 of the through-hole 13 drilled in the post-installed mold plate 12 is the same as the conventional through-hole shown in FIG. Even if the inner diameter D1 of 13 is reduced to about 9 mm compared with 12 mm, the diameter difference between the through hole 13 and the tip 18b of the auxiliary tool 17 becomes as large as about 8 mm, and the auxiliary tool 17 with respect to the axis of the through hole 13 is increased. If the deviation of the axial center of the tip 18b is within a range of 4 mm in the radial direction, the auxiliary tool 17 is inserted into the through-hole 13 by the self-aligning action of the auxiliary tool 17 with respect to the through-hole 13 and the tip screw shaft portion 9b of the separator 5 In addition, it can be inserted easily and smoothly. At this time, the difference in diameter between the outer diameter d2 of the large-diameter portion of the auxiliary tool 17 and the inner diameter D2 of the through hole 13 is very small at about 0.2 mm.

  As is clear from the above description, the auxiliary tool 17 is placed on the tip screw shaft portion 9b of each separator 5 in a state of protruding from the existing mold plate 4, and the auxiliary tool 17 is attached to the magnetic attraction force of the magnet 19. By installing the rear installation mold plate 12 in a state of being held by the front screw shaft portion 9b of each separator 5 by the conventional method, the front screw shaft portion 9b of each separator 5 and the rear installation mold plate 12 side are conventionally provided. The position of the auxiliary tool 17 is that the tip screw shaft portion 9b of each separator 5 cannot be inserted into the through hole 13 unless the radial deviation of the axial center with respect to the through hole 13 is within the range of 2.1 mm. By using together, if the radial deviation of the axial center between the front end 18b of the auxiliary tool 17 and the through hole 13 on the rear installation formwork plate 12 side is within a range of 4 mm, the auxiliary tool 17 is surely moved to the inner side. It is inserted through the through hole 13 together with the tip screw shaft portion 9b. It is possible, installation work of the rear-mounted frame plate 12 can be performed very easily. In addition, as shown in FIG. 4B, after installing the post-installed mold plate 12, the auxiliary tool 17 protruding outside the mold plate 12 is placed between the magnet 19 and the tip screw shaft portion 9 b of the separator 5. The auxiliary tool 17 can be easily removed simply by pulling it out against the magnetic attractive force, and the rod-like main body 14a of the formwork fastener 14 protrudes from the rear end of the formwork plate 12 to the front end of each separator 5. The concrete mold 2 can be assembled by screwing and connecting to the screw shaft portion 9b by the same working method as before. Moreover, since the inner diameter of the through hole 13 of the rear-installed mold plate 12 can be reduced to, for example, about 9 mm as compared with the conventional case, play (gap) between the through hole 13 and the tip screw shaft portion 9b of the separator 5 can be achieved. Can be significantly reduced.

  The magnet 19 of the auxiliary tool 17 is embedded in the bottom surface of the bottomed hole 20 provided in the shaft-shaped main body 18 of the auxiliary tool 17, but one end surface of the magnet 19 is bonded to the bottom surface of the bottomed hole 20 with an adhesive. It can also be fixed by bonding.

  The auxiliary tool for assembling the concrete mold of the present invention has the post-installed mold plate installed so that the tip screw shaft portion of the separator fixed at a predetermined position is inserted into the through hole provided in the post-installed mold plate. In order to facilitate the work to be performed, it can be utilized as an auxiliary tool that is used by being put on the tip screw shaft portion of the separator.

1, 2 Concrete formwork 3 Concrete placement space 4 Existing formwork plate 4
5 Separator 6,14 Formwork fastener 7,8,15,16 Batter material 9a, 9b Separator tip screw shaft portion 10a, 10b Separator mold plate receiving washer 11, 13 Through hole 12 Back-installed form plate 17 Auxiliary tool 18 Shaft-shaped body 18a Conical portion 18b Point 19 Magnet 20 Bottomed hole

Claims (1)

  An auxiliary tool externally fitted to the screw shaft portion of the separator for assembling the mold having a screw shaft portion inserted from the inside into a through hole provided in the mold plate at the end, and made of a synthetic resin shaft A bottomed hole into which the screw shaft portion is removably inserted is provided concentrically from one end of the main body, and the other end of the main shaft is formed in a conical shape having a smaller diameter toward the tip. A concrete form assembly assembling tool, wherein a magnet attracting the tip end surface of the screw shaft portion is disposed at the bottom of the bottomed hole.

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