JP6373218B2 - Height adjustment jig and method for forming rising portion of slab - Google Patents

Description

  The present invention relates to a height adjustment jig for a floating mold and a method for forming a rising portion of a slab using the jig.

  In order to prevent rainwater from entering the room, a rising portion is provided between the outdoor such as the common hallway and the balcony and the room. For example, in the case of an apartment house, the window frame (sash) of the window for going out to the balcony is installed at the rising portion, and when the outer wall is an ALC plate (lightweight concrete plate), the rising portion is provided as a supporting portion.

  When these rising portions are separately formed on the floor concrete later, a concrete joint is formed at the floor level. Such a joint portion is likely to be damaged, and cannot prevent the rainwater from entering for a long period of time.

  For this reason, it is desirable that the rising portion is cast integrally with the floor concrete. In this case, the formwork at the rising portion is a floating formwork (also referred to as a floating formwork) that is lifted from the floor formwork or the like by the amount of floor concrete placement.

  Since a window frame, an ALC plate, and the like are installed at the rising portion, sufficient accuracy is required for the position and height thereof. There is a method in which a concrete block is installed under the floating formwork and the floating formwork is floated from the floor formwork (the upper end portion in the case of a half PCa floor) (for example, see Patent Document 1). However, with this method, the height of the floating formwork cannot be adjusted. Therefore, a method capable of adjusting the height of the floating formwork has been proposed.

  For example, in Patent Document 2, a shape steel is fixed to an H-shaped steel, which is a steel beam having a steel-frame reinforced concrete structure, with a fixing jig, and a threaded portion of a threaded separator that supports a floating mold is screwed to the shaped steel, It is described that the floating formwork is held at a predetermined position by a nut (P-con) at the tip of the separator.

  Further, in Patent Document 3, the arm portion of the formwork support member is fixed to a reinforcing bar, and the floating formwork (floating mold) is supported by a support member fixed to the upper end of a vertical member that moves up and down relative to the arm portion of the formwork support member. Frame) is described.

Japanese Patent No. 4010937 JP-A-10-331424 Japanese Patent No. 5670655

  However, the method described in Patent Document 2 can be applied only to a steel reinforced concrete structure. In addition, since the height adjustment work is performed below the receiving mold, it is difficult to perform the work especially when supporting a heavy floating floating form made of steel. Furthermore, the fixing jig, the shape steel, and the threaded separator are buried and cannot be reused.

  In the method described in Patent Document 3, a reinforcing bar for fixing the arm portion needs to exist near the mounting position of the support device. In addition, since the height adjustment work is performed below the receiving mold, it is difficult to perform the work especially when a heavy weight floating mold made of steel is supported. Furthermore, the formwork support material is buried and cannot be reused.

  Particularly in the case of a high-rise apartment house, the rising parts are substantially the same in shape, so that the floating formwork is desirably a rigid steel formwork that can be used repeatedly. In the methods described in Patent Documents 2 and 3, it is very difficult or substantially impossible to adjust the height of such a heavy floating frame.

  In view of the above points, the present invention provides a height adjusting jig capable of easily adjusting the height of a floating formwork for heavy objects, and a method for forming a rising portion of a slab using the same. With the goal.

  In the height adjusting jig of the present invention, in order to integrally form the slab and the rising part rising from the slab by casting concrete, the concrete is cast inside the mold part and the rising part is formed. A height adjusting jig for adjusting the height of the floating formwork to be formed from the base, wherein the lower part is supported by the base and extends in the vertical direction, and from the upper end of the formwork part of the floating formwork A gripping portion that grips a gripped portion extending outward and is movable in the vertical direction with respect to the support portion, and a contact support portion that is attached to the support portion and supports the gripping portion by contacting the gripping portion It is characterized by providing.

  According to the height adjustment jig of the present invention, the gripped portion that extends outward from the upper end of the mold portion of the floating mold is gripped by the grip portion that is movable in the vertical direction on the support portion supported by the base. By adjusting the vertical position of the grip portion relative to the support portion, the height of the floating mold can be adjusted. Therefore, compared with the methods described in Patent Documents 2 and 3 in which the height adjustment work is performed below the floating formwork, the height adjustment work can be performed near the upper end of the floating formwork. The work can be easily performed.

  Furthermore, since the gripping portion is supported by abutting the abutting support portion attached to the support portion, the floating mold frame that grips the gripped portion by the gripping portion can be stably supported.

  In the height adjusting jig of the present invention, the support portion is a full screw rod having cap nuts attached to upper and lower ends, and the gripping portion is a through screw hole screwed into the full screw rod. A receiving surface that receives a lower surface of the gripped portion, and a pressing tool capable of pressing the gripped portion from above, and the contact support portion is screwed to the entire screw rod, and the through screw hole It is preferable that the entire threaded rod is in contact with and supported by the gripping portion through which the threaded rod is threaded.

  In this case, the force of rotating all the screw rods is expanded and the floating mold is moved up and down via the abutting support part and the grip part supported by this, so that the floating mold is made of steel and is heavy. Even so, the height can be easily adjusted. Then, by adjusting the height in a state in which the abutting support portion abuts and supports the grip portion, the floating mold can be held during and after the height adjustment. The contact support part may be a nut, for example. As a result, the height adjustment jig is composed of relatively common parts such as all screw rods and nuts, and can be easily manufactured.

  In this case, the force of rotating all the screw rods is expanded and the floating mold is moved up and down via the gripping part, so that the height can be easily adjusted even if the floating mold is made of steel. It can be carried out. Then, the adjusted state can be held by the contact support portion contacting and supporting the grip portion. The contact support part may be a nut, for example. As a result, the height adjustment jig is composed of relatively common parts such as all screw rods and nuts, and can be easily manufactured.

  The method for forming a rising portion of a slab according to the present invention uses a floating formwork provided with a mold portion in which concrete is cast inward to form a rising portion, and the slab and the rising portion rising from the slab are made of concrete. A method of forming by casting and integrally forming a gripped portion extending outward from an upper end of a mold portion of the floating mold with a gripping portion of a height adjusting jig; A step of supporting the lower portion of the support portion of the tool on the base, a step of adjusting the vertical position of the grip portion relative to the support portion, and a fixing portion extending outward from the lower end of the mold portion of the floating mold frame, A step of fixing to the base via a fixing member, a step of removing the height adjustment jig from the floating formwork, a step of placing concrete to form the slab and the rising portion, and the conch After chromatography bets is cured, characterized in that it comprises a step of removing the floating mold.

  According to the method for forming the rising portion of the slab of the present invention, the gripped portion that extends outward from the upper end of the mold portion of the floating mold is gripped by the gripping portion with the height adjusting jig. Then, the height of the floating mold is adjusted by adjusting the vertical position of the grip portion with respect to the support portion. Therefore, compared to the methods described in Patent Documents 2 and 3 in which the height adjustment work is performed below the floating formwork, the work can be performed near the upper end of the floating formwork, so the work is easy. It becomes possible to do.

  Further, after the floating formwork is fixed with the fixing material, the height adjusting jig is removed. Therefore, unlike the methods described in Patent Documents 2 and 3, the height adjusting jig can be used repeatedly, which is advantageous in terms of cost.

  In the method for forming a rising portion of the slab according to the present invention, the gripped portion of the floating mold is continuous in the longitudinal direction of the floating mold, and the fixed member of the floating mold is spaced by a flat plate member. It is preferable that a plurality of them are arranged by opening.

  In this case, it is possible to support at the location of the base suitable for supporting the support portion of the height adjusting jig. In addition, since the fixed portions having a gap are fixed to the base via the fixing material, the floating formwork can be stably fixed.

  In the method for forming a rising portion of the slab according to the present invention, the floating mold is preferably a steel mold.

  In this case, the floating formwork can be used repeatedly, which is advantageous in terms of cost.

  In the method for forming the rising portion of the slab according to the present invention, the fixing member includes a receiving portion that receives the fixing portion of the floating mold frame from below, and a leg portion that supports the receiving portion with respect to the base. preferable.

  In this case, the floating formwork can be stably fixed to the base.

  In the method for forming a rising portion of the slab according to the present invention, it is preferable that the method further includes a step of removing the receiving portion of the fixing material after the concrete is hardened and repairing a concave portion generated when the receiving portion is removed with a mortar. .

  After the concrete is hardened, if the receiving part is removed by holding the concrete, the predetermined cover thickness may not be ensured. Therefore, the concave portion generated when the receiving portion is removed is repaired with mortar to ensure the cover thickness.

The typical sectional view showing the state where the height adjustment jig concerning the embodiment of the present invention was attached to the floating formwork. The typical sectional view showing a state where a floating formwork is fixed with a fixing material. The typical sectional view showing a state where a height adjustment jig is removed. The typical sectional view showing the state where the floating formwork etc. were removed and the receiving part of the fixing material was taken out.

  A height adjusting jig 10 according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the height adjusting jig 10 adjusts the height of the floating mold 20 with respect to the base A.

  The floating formwork 20 includes a formwork part 21 that receives concrete inside, a gripped part 22 that extends outward from the upper end of the formwork part 21, and a fixing part 23 that extends outward from the lower end of the formwork part 21. . The gripped portion 22 is preferably provided continuously in the longitudinal direction of the mold portion 21 (direction perpendicular to the paper surface of FIG. 1). A plurality of fixing portions 23 are preferably provided at intervals in the longitudinal direction of the mold portion 21.

  The mold part 21 has a known configuration in which a pair of slats 24 are arranged at a predetermined interval by a separator (not shown) or the like. Here, the dam plate 24 is made of an L-shaped steel 24 having an L-shaped cross section, and a flange positioned on the upper side of the L-shaped steel 24 serves as the gripped portion 22.

  And the fixing | fixed part 23 is an L-shaped steel plate in which the through-hole 23b was formed in the horizontal piece 23a, and the outer surface of the vertical piece 23c is being fixed to the outer surface of the L-shaped steel 24 by welding. The lower end of the L-shaped steel 24 and the lower surface of the horizontal piece 23a are located at the same height. The fixing portion 23 may be formed by cutting an L-shaped steel.

  The height adjusting jig 10 is supported by the base A at the lower part, and can hold the support part 11 extending in the vertical direction and the gripped part 22 of the floating mold 20, and moves in the vertical direction with respect to the support part 11. A possible grip portion 12 and a contact support portion 13 that contacts and supports the grip portion 12 are provided.

  The support portion 11 is composed of a fully threaded rod 11a that extends in the vertical direction and cap nuts 11b and 11c that are respectively screwed and fixed to the upper and lower ends thereof. The top portion of the bottom cap nut 11c abuts on the base A, here the upper surface of the floor mold A, so that the support portion 11 is supported.

  A through screw hole 14b penetrating in the vertical direction is formed in the trunk portion 14a of the bracket 14 having a generally U-shaped cross section, and the entire screw rod 11a is screwed through the through screw hole 14b. . As a result, the bracket 14 is movable in the vertical direction with respect to the support portion 11. Here, although the through screw hole 14b is provided over the entire length in the vertical direction of the trunk portion 14a of the bracket 14, it is not limited to this. For example, a thread portion may be provided in a part of the entire length of the trunk portion 14a in the vertical direction, for example, the upper end portion and the lower end portion of the trunk portion 14a, or the upper end portion or the lower end portion, and the other portions may be simply holes.

  The gripping portion 12 grips the gripped portion 22 of the floating mold 20 from above and below, and here, the gripped portion 12 is covered on a horizontal receiving surface 14d provided on the upper surface of the lower protruding portion 14c of the bracket 14. In a state where the lower surface of the gripping portion 22 is received, the lower end of the bolt 15 screwed into the screw hole 14f formed through the upper protruding portion 14e of the bracket 14 is fixed by pressing the upper surface of the gripped portion 22. The

  With such a configuration, even if the thickness of the gripped portion 22 changes, the gripped portion 22 can be firmly gripped by the grip portion 12 in a clamped manner. The bolt 15 corresponds to the pressing tool of the present invention. The grip portion 12 is movable in the vertical direction with respect to the support portion 11 because the bracket 14 is movable in the vertical direction with respect to the support portion 11.

  Here, the abutting support portion 13 is a long nut 13 screwed in the middle of the entire screw rod 11a, and the upper surface of the long nut 13 on the grip portion 12 positioned at an arbitrary position in the vertical direction of the entire screw rod 11a. The holding part 12 can be supported by making it contact | abut. Thereby, the floating mold frame 20 that grips the gripped portion 22 with the gripping portion 12 can be stably supported.

  Thus, since the support part 11 consists of the full threaded rod 11a, the height of the holding part 12 can be easily adjusted by rotating the full threaded rod 11a. And at this time, even if the floating formwork 20 is a heavy object made of steel, the height adjustment is performed by manually or electrically rotating the cap nut 11b fixed to the upper end of the entire threaded rod 11a. Can be easily performed. Further, the cap nut 11b is positioned above the floating mold 20, and the height adjustment work is easier than in the case of the above-mentioned Patent Documents 2 and 3 that operate below the floating mold 20.

  Next, a method of forming the rising portion C (see FIG. 4) of the slab B using the height adjusting jig 10 according to the embodiment of the present invention will be described with reference to the drawings.

  First, although not shown in the drawing, the height adjustment jig 10 is fixed to the floating mold 20 on a horizontal surface on the ground, and the height adjustment jig is set so that the height of the floating mold 20 becomes a preset height from the horizontal plane. A step of adjusting the height of the grip portion 12 of the tool 10 is performed. This adjustment is performed by rotating the cap nut 11b fixed to the upper end of the entire threaded rod 11a with a spanner or the like. The adjustment is performed in a state where the upper surface of the abutting support portion 13 is in contact with the lower surface of the grip portion 12, and this state is maintained even after the adjustment.

  Since the height adjustment is performed on the upper side of the floating formwork 20, the work is easy. Moreover, since the force which rotated the cap nut 11b with the spanner etc. is expanded and the floating mold 20 is moved up and down via the holding part 12, even if the floating mold 20 is steel and is heavy, it is high. Adjustments can be made.

  In addition, it is preferable to fix the plurality of height adjusting jigs 10 to the floating mold 20 with appropriate intervals. It is also preferable to fix the height adjusting jig 10 so as to face the mold part 21 of the floating mold 20. A separator (not shown) or the like may be used so that the spacing of the weir plate 24 is kept constant, and a member that connects the weir plate 24 may be installed on the gripped portion 22.

  Next, as shown in FIGS. 1 and 2, the floating mold 20 to which the height adjusting jig 10 is fixed is moved to a place where the rising portion C (see FIG. 4) is formed, and a preset position is set. The process of installing in.

  At this time, the top of the cap nut 11c fixed to the lower end of the entire threaded rod 11a is brought into contact with the upper surface of the base A.

  Then, surveying is performed based on a preset reference point (not shown), the position of the floating mold 20 is adjusted, and if necessary, the height of the floating mold 20 is adjusted by the height adjusting jig 10. To do. Since the height of the floating mold 20 changes due to the inclination of the surface of the floor mold A or the like that supports the floating mold 20, the height of the floating mold 20 may need to be adjusted.

  Also at this time, since the height adjustment is performed on the upper side of the floating formwork 20, the work is easy. Moreover, since the force which rotated the cap nut 11b with the spanner etc. is expanded and the floating mold 20 is moved up and down via the to-be-gripped part 22, even if the floating mold 20 is made of steel and is heavy, Height adjustment can be performed. Note that the adjustment may be appropriately performed thereafter.

  Next, a step of installing a fixing material 30 for fixing the floating mold 20 is performed.

  The fixing material 30 is fixed to the fixing portion 23 of the floating mold 20 and supports the floating mold 20 with respect to the floor mold A. The fixing member 30 includes a receiving portion 31 that receives the fixing portion 23 of the floating mold 20 and leg portions 32 that support the receiving portion 31 with respect to the floor mold A.

  Here, the receiving part 31 is a P-con (plastic cone), and the leg part 32 consists of a full screw rod. A P-con 31 is screwed and fixed to the upper ends of all the screw rods 32. Then, the upper thread portion of the P-con 31 is inserted through the through-hole 23b formed in the horizontal piece 23a of the fixing portion 23, and the nut 33 is screwed together. Thereby, the state which received the fixing | fixed part 23 of the floating formwork 20 with P-con 31 is maintained by the nut 33. FIG.

  With such a configuration, the floating mold 20 can be supported by the fixing member 30 even if the height of the receiving portion 31 and thus the floating mold 20 is changed. The floating mold 20 can be fixed to the floor mold A without changing the height.

  The leg portion 32 of the fixing member 30 is fixed to the floor mold A at the lower end portion. In addition, when a floor consists of a reinforced concrete slab, the leg part 32 may be tied to the reinforcing bar of a slab, or the leg part 32 may be welded to the arm fixed to the reinforcing bar. Moreover, when a floor consists of a half precast plate, the leg part 32 may be supported as it is with the upper surface, and you may weld to a truss reinforcement. Thus, the existing method may be used for supporting the floating mold 20 by the fixing material 30. Floor form A, slab reinforcement, half precast plate, etc. correspond to the base of the present invention.

  A full precast version D is installed on the balcony side. A spacer 41 having the same thickness as the horizontal piece 23a of the fixed portion 23 is placed on the upper surface of the full precast plate D, and the horizontal piece 23a of the fixed portion 23 is pressed by the presser fitting 42. The presser fitting 42 is fixed to the full precast plate D by bolts 43 inserted through the through holes 42a. Thereby, the floating mold 20 is fixed to the full precast plate D.

  Next, as shown in FIG. 3, after the fixing material 30 is installed, a step of removing the height adjusting jig 10 from the floating mold 20 is performed. With reference to FIG. 2, if the bolt 15 is loosened, the height adjusting jig 10 can be easily removed from the floating mold 20.

  Next, a step of placing concrete is performed.

  Then, after concrete solidifies, the process of removing the floating formwork 20 is performed. Thereby, as shown in FIG. 4, the slab B and the rising part C are integrally formed.

  Then, after removing the nut 33 and taking out the P-con 31, a step of repairing the concave portion 51 generated by taking out the P-con 31 with mortar or the like is performed. When the P-con 31 is taken out, the head portion of the leg portion 32 is exposed, and the cover thickness cannot be secured. Therefore, the concave portion 51 is repaired with mortar or the like to ensure the cover thickness.

  In addition, it is desirable to perform the installation of the fixing member 30 and the removal of the height adjusting jig 10 immediately before placing the concrete.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this. For example, a case has been described in which the height adjusting jig 10 is pressed by the bolt 15 and the gripping portion 12 grips the gripped portion 22 of the floating mold 20. However, the gripping method of the gripping part 12 is not limited to this, and may be gripped by a mechanism such as a clip, for example.

  Further, the support portion 11 may be a bar material having a screw portion in part instead of the full screw rod 11a. The abutment support portion 13 may be a normal nut instead of a long nut, and may be a clip or the like. The abutting support portion 13 may be integrally joined to the grip portion 12. The height adjustment may be performed by moving the grip portion 12 up and down to a preset height, and then contacting the upper surface of the contact support portion 13 to maintain the adjusted state. In addition, the structure of the height adjusting jig 10 in the embodiment is merely an example.

  DESCRIPTION OF SYMBOLS 10 ... Height adjustment jig, 11 ... Support part, 11a ... All screw rod, 11b, 11c ... Cap nut, 12 ... Holding part, 13 ... Contact support part, Long nut, 14 ... Bracket, 14b ... Through screw hole 14d ... Receiving surface, 14f ... Screw hole, 15 ... Bolt, pressing tool, 20 ... Floating formwork, 21 ... Formwork part, 22 ... Holded part, 23 ... Fixed part, 24 ... Plate, L-shaped steel, 30: Fixing material, 31: Receiving part, P-con, 32 ... Leg part, Full screw rod, 33 ... Nut, 51 ... Recess, A ... Base, floor formwork, B ... Slab, C ... Rising part, D ... Full Precast version.

Claims (7)

In order to integrally form the slab and the rising portion rising from the slab by casting concrete, the height of the concrete from the base of the floating mold form the rising portion by placing the concrete inside the mold portion. A height adjusting jig for adjusting the height,
A lower portion supported by the base and extending in the vertical direction;
A gripping part that grips a gripped part extending outward from an upper end of the mold part of the floating mold, and is movable in a vertical direction with respect to the support part;
A height adjusting jig, comprising: an abutment support portion attached to the support portion and abutting on the grip portion to support the grip portion. The support portion is a full screw rod with cap nuts attached to the upper and lower ends,
The gripping portion has a through screw hole that is screwed onto the entire screw rod, a receiving surface that receives a lower surface of the gripped portion, and a pressing tool that can press the gripped portion from above.
The said contact support part is screwed by the said all screw rod, and contacts and supports the said holding part by which the said all screw rod was screwed by the said through screw hole, The support part of Claim 1 characterized by the above-mentioned. Adjustable jig height adjustment tool. Using a floating formwork provided with a formwork part in which concrete is cast inward to form a rising part, the slab and the rising part rising from the slab are integrally formed by casting concrete. ,
Gripping the gripped portion extending outward from the upper end of the mold portion of the floating mold with the grip portion of the height adjustment jig;
A step of supporting a lower portion of a support portion of the height adjustment jig on a base;
Adjusting the vertical position of the grip portion relative to the support portion;
Fixing a fixing portion extending outward from a lower end of a mold portion of the floating mold to the base via a fixing material;
Removing the height adjustment jig from the floating formwork;
Placing concrete to form the slab and the raised portion;
And a step of removing the floating form after the concrete has hardened. The gripped portion of the floating mold is continuous in the longitudinal direction of the floating mold,
The method for forming a rising portion of a slab according to claim 3, wherein a plurality of flat plate-like members are arranged at intervals in the fixing portion of the floating formwork.   The method for forming a rising portion of a slab according to claim 3 or 4, wherein the floating formwork is a steel formwork. The fixing material is
A receiving portion for receiving the fixed portion of the floating formwork from below;
The method for forming a rising portion of a slab according to any one of claims 3 to 5, further comprising a leg portion that supports the receiving portion with respect to the base.   The slab according to claim 6, further comprising a step of removing a receiving portion of the fixing material after removing the floating formwork and repairing a concave portion generated when the receiving portion is removed with a mortar. Method for forming the rising portion.