JPH0810632Y2 - Jig for prop upright - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a jig for erecting a pillar for forming a hole for erecting a pillar such as a handrail attached to a corridor or a balcony of a high-rise house. It is about.

[Prior Art] As a conventional method for burying an anchor for mounting this type of handrail support, there is an invention disclosed in Japanese Patent Laid-Open No. 63-184665. This invention is to install a tubular body made of an iron plate or the like in which a space for mounting a pillar is formed in a temporary form frame that constitutes a parapet by an anchor mounting frame, and then concrete is placed in the temporary form frame. After curing, disassemble the temporary formwork and then remove the anchor mounting frame from the cylinder. Then, the support is inserted into the cylinder embedded in the parapet, and concrete or the like is put in the cylinder to fix the support.

Further, in Japanese Patent Laid-Open No. 62-164961, a ribbon-shaped thin plate is spirally wound to form a surface corrugated cylindrical body, concrete is placed around the cylindrical body as a form, and the concrete is hardened. A method is disclosed in which the upper end portion of the rear thin plate is pulled and disassembled, and the latter is drawn in the form of a ribbon-shaped thin plate to form a concrete pouring hole.

[Problems to be Solved by the Invention] In the invention disclosed in Japanese Patent Laid-Open No. 63-184665, since the support is erected in the cylindrical body made of an iron plate or the like embedded in the parapet, Rainwater and the like will infiltrate between the concrete and rust will be generated in the cylinders and reinforcing bars, and the destruction of parapets and building frames will be promoted. Further, there are various problems such as an increase in cost because the number of columns is required for the cylindrical body.

The invention disclosed in Japanese Patent Laid-Open No. 62-164961 is
Since a ribbon-shaped thin plate is spirally wound to form a flexible cylinder, the cylinder is not deformed when the cylinder is formed or when concrete is poured, and an accurate hole is not formed. There is a problem in that the stanchions installed cannot be erected firmly because the gaps between the stanchions and the hole walls are non-uniform. Further, it is difficult to reuse a thin plate that has been pulled out after hardening of concrete, resulting in an increase in cost.

The present invention has been made to solve the above problems,
It is an object of the present invention to obtain a jig for erecting a column such as a handrail which has a simple structure, is easy to install and remove, and can reduce the cost.

[Means for Solving the Problem] A jig for standing uprights according to the present invention has a columnar body having a spiral convex portion formed on the outer periphery thereof and which can be extracted from hardened concrete, and a columnar body of the columnar body. It has a support frame consisting of a mounting part that is longer than the diameter and both ends of the mounting part that are bent downward and then extends outward, and the columnar body is integrally fixed to the mounting part of this support frame. It was done.

[Operation] A columnar body is inserted between the temporary form frames that form a parapet or the like, screwed to the temporary form frame of the arm portion of the support frame, and concrete is poured. When the support frame is rotated after the screw is removed to remove the temporary form after a predetermined period of time, the columnar body is lifted by the screw action of the spiral convex portion and is withdrawn from the parapet or the like. As a result, a hole for erection of the column is formed in the parapet or the like with a size corresponding to the columnar body.

[Embodiment] FIG. 1 (a) is a front view of an embodiment of the present invention, FIG. 1 (b) is a plan view, and FIG. 2 is a perspective view thereof. In both figures, (2)
Is a cylindrical body made of aluminum casting, aluminum die cast molding, synthetic resin molding, etc., and has a screw hole (4) on the upper surface and a spiral convex portion (3) with an arc cross section on the outer circumference. Are formed. Reference numeral (5) is a support frame, which includes a mounting portion (6) longer than the diameter of the columnar body (2), and arm portions (7) and (7a) that are bent outward on both sides and then extended outward. The mounting portion (6) and the arm portions (7) and (7a) are provided with through holes (8) and (9) for the bolts (10) and (11), respectively. The support frame (5) is integrally fixed to the upper surface of the columnar body (2) with bolts (10), and constitutes a support pillar standing jig (1). (15) and (15a) are parapets (1
8) Temporary formwork for constructing the flange (16),
The (16a) is provided with screw holes (17) into which the bolts (11) are screwed in at intervals corresponding to the intervals of the upright columns.

Next, a procedure for forming a hole for uprighting a strut on the parapet by the above-described strut standing jig (1) will be described. First, place the temporary formwork (1
Set 5) and (15a). Then, the temporary formwork (15),
Insert the cylindrical body (2) between (15a), and place the arms (7) and (7a) of the support frame (5) on the flanges (16) and (16a) of the temporary formwork (15) and (15a). Place it on and secure with bolts (11). At this time, the columnar body (2) has two temporary formwork (15), (15
It is located almost in the middle of a) and has a cylindrical body (2) and a temporary formwork (1
The gap between 5) and (15a) is kept almost uniform. In addition,
In the figure, the reinforcing bars and the like arranged between both temporary molds (15) and (15a) are omitted.

Then, concrete is placed between both temporary molds (15) and (15a), and after the concrete hardens, the bolt (11) is removed and the temporary molds (15) and (15a) are removed. The state at this time is shown in FIG.

Next, when the arms (7) and (7a) of the support frame (5) are held by hand and turned in the direction of the arrow, the cylindrical body (2) is screwed by the spiral convex portion (3) provided on the outer periphery thereof. 4 and is pulled out from the parapet (18) as shown in FIG. 4, and the parapet (18) has a cylindrical body (2) having a concave portion (20) corresponding to the spiral convex portion (3) on the inner circumference. Corresponding to the hole (1
9) is formed. Then, the support pillar can be vertically fixed to the parapet (18) by inserting the support pillar into the hole (19) and injecting mortar, resin or the like around the support pillar.

In addition, the jig (1) for upright supporting the column can be repeatedly used for subsequent works. Further, since the spiral recess (20) is formed in the inner peripheral surface of the hole (19) formed in the parapet (18), the adhesion strength of concrete or the like can be increased.

In the above description, the example in which the spiral convex portion (3) having an arcuate cross section is provided on the outer periphery of the cylindrical body (2) has been shown, but the sectional shape, size, and degree of density of the convex portion (3), etc. Is not limited to this, and can be appropriately changed. Further, by using the columnar body (2) corresponding to the length and thickness of the upright columns, holes of any desired size can be formed.

[Effects of the Invention] As is clear from the above description, the present invention comprises a cylindrical body having a spiral convex portion on the outer periphery integrally attached to a support frame, and the cylindrical body is inserted between temporary molds. Then, after the concrete is hardened and the concrete is hardened, the support frame is rotated and the columnar body is pulled out to form a hole for supporting the pillar on the parapet, so that the structure is simple and the pillar is easy to work. A standing jig can be realized.

Further, since the columnar body is pulled out without being buried in the building body, rusting due to infiltration of rainwater or the like does not promote the destruction of the building body. Further, the columnar body can be reused any number of times, so that the cost can be reduced. Further, since the spiral concave portion is formed on the inner peripheral surface of the hole, the adhesion strength of the injected mortar or the like can be enhanced, and the effect of the implementation is remarkable.

[Brief description of drawings]

1 (a) is a front view of an embodiment of the present invention, FIG. 1 (b) is a plan view thereof, FIG. 2 is a perspective view of FIG. 1 (a), FIG. 3 and FIG.
The figure is an explanatory view of the operation of the embodiment of the present invention. (1): Jig for erecting the column, (2): Cylindrical body, (3): Spiral convex part, (5): Support frame, (6): Mounting part,
(7), (7a): Arm, (10), (11): Bolt, (1
5), (15a): Temporary formwork, (18): Parapet, (19):
hole.

Continuation of the front page (56) References Japanese Patent Application Laid-Open No. 63-184665 (JP, A) Japanese Patent Application No. 52-87709 (Japanese Utility Model Application No. 54-16127) The contents of the specification and drawings attached to the application are photographed. Microfilm (JP, U) Microfilm (JP, U) taken from the contents of the description and drawings attached to the application for Japanese Patent Application No. 56-105283 (No. 58-11551, Japanese Utility Model Application)

Claims (1)

[Scope of utility model registration request] 1. A columnar body having a spiral convex portion formed on the outer periphery and capable of being extracted from hardened concrete, a mounting portion longer than the diameter of the cylindrical body, and both end portions of the mounting portion folded downward. A support stand erecting jig, which has a support frame composed of an arm portion that is bent and then outwardly extended, and the columnar body is integrally fixed to a mounting portion of the support frame.