JPH0754469Y2 - Separator for tightening concrete formwork - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a mold clamping separator as a erection equipment, in particular a concrete mold clamping separator used for concrete placing construction using a polystyrene foam resin plate as a mold. It is about.

[0002]

2. Description of the Related Art Conventionally, formwork clamping separators for sandwiching a formwork made of plywood panels at a constant interval have been used as erection equipment used during concrete pouring construction. This type of mold clamping separator is generally screwed on both ends of the metal rod, and nuts are screwed on both screws of the mold clamping separator inserted into both molds,
This is to prevent the expansion of the formwork when concrete is poured.

In recent years, with the increase in the size and height of buildings, it has been demanded to reduce the weight of the erection equipment because it is necessary to reduce the total weight, and also to reduce the weight of the erection equipment in order to improve safety and workability. Thus, it has been attempted to use a mold made of a styrofoam resin plate material instead of the mold made of a plywood panel. Along with this, there has been a demand for a mold-tightening separator that is most suitable for the Styrofoam resin-made mold and that also corresponds to the weight reduction of the erection equipment.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, is optimal for a foam polystyrene resin mold, is lightweight, and is capable of assuring a placing dimension, and at the same time, the construction is difficult. An object of the present invention is to provide a concrete form fastening separator having a very simple new structure.

[0005]

A concrete mold fastening separator according to the present invention is a mold fastening separator for holding molds made of styrofoam plate material arranged side by side with a predetermined gap. It has a screw shaft structure molded from hard resin, and both outside screws have a length equivalent to the sum of the plate thickness of the two formwork used for placing concrete and the thickness of the concrete to be placed. In addition to screwing the stopper allowance screwing allowance on the part,
An annular groove type cutting structure is formed on both sides of the central part of the shaft with a space corresponding to the thickness of the concrete being poured, and a tip structure with a drill blade on the tip side and a rotating jig on the rear side. And a separator main body for tightening a frame, which is configured as a fitting structure, and a separator stopper screwing screw formed on a rigid body such as ABS resin and screwed at both ends of the main body of the mold tightening separator. A nut to be screwed with the threaded screw part is formed by screwing from the disk-shaped contact surface side, and a stopper for each separator on the tip side and the tail end that forms a rotating structure such as a hexagonal head at the outer end. It is made up of the following.

Further, the mold body tightening separator body is
It is preferable to form a detent groove in which a part of the screw thread is cut out in the central portion of the shaft. It is preferable that the nut of the tip-side separator stopper has a cap nut structure capable of accommodating a drill blade-shaped tip structure of the mold body clamping separator body.

[0007]

[Operation] When assembling the molds, a screw structure is used with the separator stopper screwed to the tail end of the separator stopper. The separator stopper is screwed onto the side screw structure until it comes into close contact with the surface of the mold. In this state, concrete is poured between both molds, and after solidification, when the hexagonal head of the separator stopper is rotated, it is twisted off from the annular cutting structure part and the mold tightening separator part within the concrete wall thickness Then, the mold made of the polystyrene foam plate material is opened to the outside and removed. Further, at the time of the above cutting, since the turning is blocked by the concrete that has entered and solidified in the detent groove formed in the mold clamping body, the shearing in the cutting structure is facilitated.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a concrete form fastening clamp according to the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view of a mold structure showing a state during concrete pouring, FIGS. 2A and 2B are separator stoppers, and FIG. 3 is a mold clamp separator main body.

Reference characters a and a are molds formed of a plate material of styrofoam resin using the concrete mold clamp separator of the present invention, and each has a plate thickness of T1.

The mold body clamping separator body 1 of the present invention and the separator stoppers 3 and 4 screwed to the tip and tail ends of the body are molded of a hard resin such as ABS resin. The present example shows a frame structure in which the concrete wall b has a wall thickness T2 of 120 mm.

The mold clamping separator main body 1 has a screw shaft structure having a drill blade-shaped tip 11 at one end, and a small amount is formed on both sides of an embedded square screw portion 12 formed by screwing in the central portion. Guide non-screw forming parts 13, 13 to guide square screw parts 14,
15 is formed by screwing, and the one guide square screw portion 14 is formed.
On the tip end side, a fastening angle screw portion 17 is formed by screwing a small non-screw forming portion 16 (which is 1 mm in the embodiment) so as to be continuous with the drill blade-shaped tip 11. On the rear end side of the other guide angle screw portion 15, a fastening angle screw portion 19 is formed by screwing through a flange 18, and a turning jig (not shown) is provided at the tail end of the fastening angle screw portion 19. The square shaft portion 20 having a square cross section and having an appropriate length is formed so as to connect with the square shaft portion 20.

A buried square screw portion 1 constituting the above screw shaft structure.
2, guide angle screw parts 14, 15 and fastening angle screw parts 17, 1
9 has an equal pitch P, and the non-screw forming parts 13 and 1
A continuous single thread is formed when traversing 3,16. Further, the embedded square screw portion 12 and the guide square screw portions 14 and 15
The screw outer diameter D1 is smaller than the screw outer diameter D2 of the fastening angle screw portions 17 and 19 (D1 <D2), and the embedded angle screw portion 12 has two detent grooves 21 and 21 extending in the longitudinal direction.
1 is configured so as to cut out the external thread.

Reference numeral 22 designates the non-screw forming parts 13, 1
3 is an annular cutting groove having a V-shaped cross-section, which is provided around each center of 3, and the space between the annular cutting grooves 22 and 22 corresponds to the plate thickness T2 (= 120 mm) of the concrete wall b to be placed. , Slightly smaller (118.5 mm in the embodiment)
The cutting structure has smaller shear stress than other parts.

The stopper 3 for the tip side separator is shown in FIG.
Further, as shown in FIG. 2A, the fastening is performed from the side of the contact surface 31 to the center of the regulation plate portion 32 having a flat disk shape with a flat outer surface (103 mm in the embodiment) on the side of the contact surface 31. The cap nut portion 34 is formed by screwing the square female screw 33 that is screwed into the square screw portion 17, and the drill nut-shaped tip 11 is housed in the cap nut portion 34. In addition, a hexagon head 35 that fits with a rotating jig such as a spanner is formed on the outer periphery of the end portion of the cap nut portion 34.

Further, the stopper 4 for the tail end side separator is
As shown in FIG. 1 and FIG. 2B, a flange fitting that fits the flange 18 is provided at the center of the flat contact surface 4 of the disc 42 having a disc shape with an appropriate outer diameter (103 mm in the embodiment). A step portion 46 is formed, and a nut portion 44 is formed by screwing a square female screw 43 that is screwed with the fastening square screw portion 19 from the bottom portion of the flange step portion 46.
A hexagonal head 45 is formed on the outer periphery of the end of the.

As shown in FIG. 1, the stoppers 3 and 4 for both separators are formed by screwing square female screws 33 and 43 into the fastening square screw portions 17 and 19 of the mold body clamping separator body 1, respectively, and abutting them. The surfaces 31 and 41 are used by being pressed against the outer surface of the form a. That is, in a state where the tail end side separator stopper 4 is screwed and integrated with the fastening angle screw portion 19 of the tail end portion of the mold body clamping separator body 1, the square shaft portion 20 serves as a rotating shaft of an electric drill or the like. They are fitted and screwed from one mold a to the other mold a. At this time, the drill blade-shaped tip 11 cuts the course, and the fastening angle screw portion 17, the guide angle screw portion 14, the embedded angle screw portion 12, and the guide angle screw portion 15 are screwed into the cutting hole in order.

Next, the square female screw 33 of the stopper 3 for the tip side separator is screwed into the fastening square screw portion 19 on the tip side and screwed in as far as it will go, and the separator body 1 for clamping the frame is axially pulled and urged. , Tighten the form a, a.

In this state, concrete b is poured between both molds a and a, and after solidifying, the hexagonal heads 35 and 45 of the stoppers 3 and 4 for both separators are turned to a rotating jig such as a spanner as shown in FIG. And rotate to the left or right. Due to this rotation, a shearing force is applied to the mold body clamping separator body 1 due to a twist in the circumferential direction, but due to the solidification of the concrete b, the detent grooves 21, 21 formed in the embedded square screw portion 12
Since the concrete b that has entered into the block hinders rotation, it is cut from the annular cutting groove 22.

Then, the outer portions from the guide screw portions 14 and 15 are removed together with the stoppers 3 and 4 for both separators together with the formwork a and a, thereby completing the construction of the concrete b. Further, in the case of removing the outer part from the cut guide screw portions 14 and 15 from the molds a and a, it is possible by fitting the hexagonal heads 35 and 45 with the turning jig and turning them leftward.

As described above, the concrete mold clamping separator according to the present invention has the embedded square screw portion 12, the guide square screw portions 14 and 15 and the fastening square screw portion 17 which are screwed on the mold clamping separator main body 1. , 19 to rotate the mold fastening separator main body 1 so as to be threadedly inserted into the molds a and a, and to attach separator stoppers 3 and 4 to the tip and tail ends. Is. In the present embodiment, each of the screw structures is formed by a square screw, but it goes without saying that a general screw screw structure can be used.

[0021]

As described above, the concrete form tightening separator according to the present invention has a simple structure and can be mass-produced by molding a hard synthetic resin into a screw shaft structure, thereby reducing the cost. In addition to the above, the present invention has features such as light weight and easy handling because it is made of synthetic resin, and the practical effect after the present invention is implemented is extremely large.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a formwork structure in a concrete pouring state showing an embodiment of a concrete formwork clamping separator according to the present invention.

FIG. 2 (a) is a stopper for a tip side separator,
(B) is a front view of the stopper for the tail end side separator.

FIG. 3A is a front view of a separator body for mold clamping,
(B-1) is an enlarged left side view of the portion A viewed from the arrow, (b-2)
Is an enlarged plan view of an arrow A part, (c) is an enlarged view of an arrow B part, (d) is an enlarged cross-sectional view of a CC line portion, and (e-1) is an enlarged cross-sectional view of an arrow D part. , (E-2) is an enlarged cross-sectional view of the E portion in the direction of the arrow.

FIG. 4 is a vertical cross-sectional view showing a concrete wall with a mold removed.

[Explanation of symbols]

 a Formwork b Concrete wall 1 Separator body for formwork tightening 11 Drill blade-shaped tip 12 Embedded angle screw part 14, 15 Guide angle screw part 17, 19 Fastening angle screw part 18 Flange 20 Square shaft part 21 Detent groove 3 Stopper for tip side separator 32 Restriction board part 33 Square female screw 34 Cap nut part 35 Hexagonal head 4 Stopper for tail end side separator 42 Restriction board part 43 Square female screw 44 Cap nut part 45 Hexagonal head

Claims (4)

[Scope of utility model registration request] 1. A formwork fastening separator for holding a formwork of styrofoam plate materials arranged side by side with a predetermined gap, which has a screw shaft structure molded of a hard resin such as ABS resin, and is suitable for placing concrete. A separator stopper screwing screw allowance is screwed on both outer screw parts of a length equivalent to the sum of the plate thickness of the two molds to be used and the casting thickness of the concrete to be poured, and the shaft center An annular groove type cutting structure is formed on both sides of the part with a space corresponding to the casting thickness of concrete, and a drill blade-shaped tip structure on the tip side,
Formed on the rear end side of the mold clamping separator body, which constitutes a fitting structure with a rotating jig, and molded from a hard resin such as ABS resin, and screwed to both ends of the mold fastening separator body. A nut that engages with a screw part that is screwed into the stopper stopper screwing part is formed by screwing from the flat contact surface side, and the outer end part has a rotating structure such as a hexagonal head. Separator for tightening concrete formwork, characterized by comprising stoppers for each separator on the side. 2. The concrete formwork tightening according to claim 1, wherein a detent groove formed by cutting out a part of a screw thread is formed in a central portion of the shaft of the formwork tightening separator main body. Separator. 3. The concrete according to claim 1, wherein the nut of the stopper for the tip end side separator has a cap nut structure capable of accommodating a drill blade-like tip structure of the mold body clamping separator body. Form clamp separator. 4. The concrete form tightening separator according to claim 1, wherein the flat contact surface of each separator stopper has a disk shape.