KR20200079006A - An Apparatus For Preparing Spacer For Concrete Form - Google Patents

Abstract

The present invention relates to an apparatus for molding a space holder for a cast, which expands and molds a slit (11) formed to bind a wedge pin in a flat tie (1) used as a space holder for a cast, in a circular hole for binding a rod-shaped tie-pin. The apparatus of the present invention comprises: a lower mold (2) including lower mold parts (21) divided into a plurality of parts and formed with an inclined surface in an arc shape at an inner end to form a hole (211) in the center thereof; a clamp means for combining and holding the lower mold parts (21) in case of expansion and molding to a circular hole; a jig (4) disposed on an upper side of the lower mold (2) to fix and hold a flat tie (1) to be molded; and an upper mold (5) vertically operated, and formed with a protrusion (51) having the diameter for expanding and molding a slit (11) of the flat tie (1) disposed on a bottom surface of a jig to the circular hole by penetrating a hole (42) of the jig. After manufacturing the flat tie with the slit for binding a wedge pin, formed at both ends thereof, the slit is expanded and molded to a circular shape to form a circular hole for binding a rod-shaped tie-pin. Therefore, the flat tie for binding the tie-pin can be also manufactured easily, such that manufacturing costs can be reduced and productivity improved.

Description

Forming device for spacer for formwork{An Apparatus For Preparing Spacer For Concrete Form}

The present invention relates to an apparatus for forming a spacer for a formwork, and an improved spacer for improving a shape of a circular hole for binding a tiepin having a circular cross section in a flat tie formed on a metal strip. It relates to an apparatus for forming a gap maintaining tool for a die for manufacturing.

In general, in order to form a concrete wall, a tie bar is disposed as a gap holder between the inner and outer dies, and the wedge pins are bound and fixed at both ends to keep the gap between the inner and outer dies constant.

An example of such a tie bar is a flat plate-like member arranged through the inner and outer formwork panels, and slits are formed at both ends protruding out of the formwork to bind with a plate-shaped wedge pin. Although it is used as a spacer for the formwork of the panel, a circular hole is formed at the end of the tie bar as a spacer for the aluminium formwork to bind a tiepin having a circular cross section.

Such a gap holder is manufactured by cutting from a strip of a steel plate to a certain length and increasing the width at both ends while forming a plate-shaped wedge pin binding slit or a rod-shaped tie pin binding hole.

As an example of such an apparatus for manufacturing a gap maintaining device, in Korean Patent Registration No. 10-0547026 (Registration Date: January 20, 2006), the upper molding device is lifted and operated on the lower molding device, but both sides of the support table top The horizontal forming plate divided into horizontally moves along the guide, but forms a slope guide surface in the center of the divided section on the upper side of the horizontal plate and installs springs on both ends of the divided section, respectively. A lower part configured to be able to enter between the divided cross sections by installing a pressure plate elastically supported by a spring at the bottom of the stage and through a rod-shaped pressure rod having a "V" shaped inclined contact end in the hollow in the center of the pressure plate. Disclosed is a tie-bar expansion hole forming device comprising a forming device.

However, the fastening hole expansion molding apparatus of the above-mentioned prior art is a tie bar molded in a lower molding apparatus such that the upper molding apparatus descends to the hollow portion of the lower molding apparatus and elastically spreads with springs on both sides when expanding the hole. The periphery of the expanded hole is sharply bent downward, which further reduces the productivity by requiring a subsequent processing process. Also, when the lower molding device is divided into two, the upper molding device descends to expand the hole. There was a problem in that the incidence of defective products was large due to tearing.

In Korean Patent Registration No. 10-0547026 (Registration Date January 20, 2006)

The object of the present invention is to solve the problems according to the above-described conventional apparatus for forming a spacer for forming a gap, and to divide the slits formed in the flat ties into four round holes to form a circular hole for binding a circular tie pin. The lower molds configured to form a circular hole with the arc-shaped indentations formed at the center of the inner side are arranged on the flat tie by preventing the displacement of the lower molds by arranging a band portion on the outer circumferential surface of the lower molds when expanding the hole of the flat tie. It is to provide an improved apparatus for forming a spacer for a formwork improved to prevent a problem of bending around a hole to be molded and a tear phenomenon.

In order to achieve the above object, the apparatus for forming a spacer for dies according to the present invention is a circular shape for tying a slit formed to bind a wedge pin in a flat tie used as a spacer for dies. In the apparatus for forming a gap maintaining tool for formwork to expand and mold alone,

A lower mold including lower mold portions having an inner end having an inclined surface in an arc shape so as to be divided into a plurality of holes and formed in a central portion,

Clamping means to keep the lower mold parts engaged during expansion molding of a circular hole,

A jig disposed above the lower mold to hold the flat tie to be molded, and

It is configured to pass through the hole of the jig, characterized in that it comprises an upper mold operating up and down formed with a projection of a diameter to expand and mold the slits of the flat tie disposed on the bottom of the jig into a circular hole.

The clamp means is arranged in a groove formed on the outer circumferential surface of the lower mold parts, and is formed by a hydraulic ring clamp that expands to allow the lower mold parts to move outward in the radial direction when the protrusions of the upper mold are inserted into the holes of the lower mold during molding. Can be.

Each of the lower mold parts is formed with an inclined surface outside the part forming the center hole, and the guide groove formed on the bottom surface of each lower mold part engages with a guide member fixed to the base so as to move radially outward during molding. It is desirable to be.

In the jig, a groove into which a flat tie to be molded is inserted is formed on the bottom side, and a hole formed into a diameter to be molded through the groove is formed.

In the groove at the bottom of the jig, in the portion where the slit of the flat tie is located, around the hole formed in the groove to allow the outer portions of the slit to also expand annularly when the slit is expanded circularly by the upper mold. A circular portion of an extended diameter is formed.

According to the apparatus for forming a spacer for a formwork according to the present invention, a flat tie having slits for wedge pin binding is formed at both ends, and then expanded and molded in a circular shape to form a circular hole for tying a rod-shaped tie pin By forming the flat tie tie tie can also be easily manufactured, which can reduce manufacturing cost and improve productivity.

1 is a perspective view of a flat tie for a die formed with slits for wedge pins.
Figure 2 is an exploded perspective view of the apparatus for forming a spacer for a formwork according to the present invention for expanding and molding the slit of the flat tie of Figure 1 into a circular hole for fastening the tie pin of the rod.
Figure 3 is an assembled perspective view of the apparatus for forming a spacer for the formwork of Figure 2;
4 is a schematic cross-sectional view and a plan view of a lower mold in a state in which the upper mold descends in order to expand and slit the slits in the apparatus for forming a gap for a die of FIG. 3.
5 is a cross-sectional view showing a state in which the upper mold is inserted into a circular hole formed by the divided mold parts of the lower mold, and a plan view of the lower mold subsequent to FIG. 4.
6 is a cross-sectional view showing that the upper mold is lifted after the slit of the flat tie is expanded and molded into a circular hole by the upper mold following FIG. 5.
Figure 7 is a perspective view of a flat tie having a circular hole for tie-pin tying by a molding apparatus of the present invention at both ends.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings showing an embodiment of an apparatus for forming a spacer for formwork according to the present invention.

1 to 3, the apparatus for forming a spacer for a die of the present invention is a tie of a slit 11 formed to bind a wedge pin in a flat tie 1 used as a spacer for a die to be molded. It is expanded and molded into a circular hole for pin binding.

For this purpose, the apparatus for forming a spacer for a formwork of the present invention is divided into a plurality, and in the illustrated embodiment, it is divided into four, and includes a lower mold portion 21 in which a hole 211 is formed in the center and an inner end has an inclined surface in an arc shape. A lower mold (2) and a clamping means for holding and holding the lower mold parts (21) at the time of molding, a jig (4) disposed on the upper side of the lower mold (2) to hold the flat tie (1) to be molded ), and the upper mold operating up and down with a protrusion 51 having a diameter extending through the hole 42 of the jig and expanding and forming the slit 11 of the flat tie 1 disposed on the bottom of the jig into a circular hole ( 5).

Each of the lower mold portions 21 is engaged with a guide member 215, for example, an LM guide, fixed to a base not shown with a guide groove 214 formed on its bottom surface, to the center direction of the lower mold 2 Will move. In addition, a recess 22 in which a hydraulic ring clamp 3 is disposed as the clamping means is formed on the outer circumferential surface of each of the lower mold parts 21. The inner ends of the lower mold parts 21 are formed by lower mold parts by the lower mold parts so that the linear slit 11 of the flat tie 1 is smoothly expanded into a circular hole when the upper mold descends. A hole 211 is formed at the center, and an outer side of the hole 211 is formed as an inclined surface 23.

In addition, the jig 4 is formed with a groove 41 into which a flat tie 1 to be molded is inserted on the bottom side and a hole 42 formed with a diameter to be formed through the groove 41 up and down. It is composed. In the groove 41 in which the flat tie 1 is inserted into the bottom surface of the jig 4, the portion where the slit 11 of the flat tie 1 is located, the slit is expanded circularly by the upper mold. When the slit outer portions are also allowed to expand in an annular shape, a circular portion 411 of a diameter extending around the hole 42 is formed in the groove 41. Both ends of the jig 4 are supported by the support members 45 and are disposed above the lower mold 2.

The ring clamp 3 for clamping the lower mold parts 21 on the outer circumferential surface is pulled at a predetermined pressure by hydraulic pressure so that the lower molds are arranged in a circular shape, and the upper mold 5 is a jig 4 When the slit of the flat tie is formed into a circular hole by descending to the hole 42 formed at the center, the protrusion 51 of the upper mold is inserted into the hole 211 formed in the center of the lower mold. It is preferable that the lower end of the protrusion 51 is formed in a conical shape.

At this time, the lower mold portions 21 should be allowed to move uniformly outward in the radial direction. To this end, the ring clamp 3 is lower mold (2) by an upper mold in which a pressure greater than a preset pressure falls. ) When acting on the inclined surface 23 of the inner side of the lower mold parts 21 forming the hole 211 in the center of the center, the ring clamp 3 is expanded, and the upper mold is lifted to be released from the hole 211 When it is reduced to its initial state.

The expansion and contraction of the ring clamp 3 is made by a hydraulic cylinder and a control valve, which are schematically shown as blocks in the drawings, while one end of the ring clamp 3 is fixed, while the other end is connected to the plunger of the hydraulic cylinder. According to the hydraulic supply, the ring clamp is configured to expand or contract, and since the hydraulic ring clamp itself is already known, detailed description thereof will be omitted.

With reference to Figures 4 to 6 will be described the process of forming a slit of a flat tie into a circular hole for tying a rod-shaped tiepin by the apparatus for forming a gap for a die of the present invention.

As shown in FIG. 4, the ring clamp 3 is tightened to a predetermined pressure in a state where the lower mold parts 21 are gathered in the center direction, and a jig 4 is provided on the upper surface of the lower mold 2 composed of the lower mold parts. ) Is disposed, and the end where the slit 11 of the flat tie 1 is formed is inserted into the groove 41 formed on the bottom surface of the jig.

Then, as shown in FIG. 5, when the upper mold 5 is lowered so as to penetrate the hole 42 of the jig 4, the protruding portion 51 having a pointed conical shape formed on the bottom surface thereof, the hole 42 ) The slit 11 of the flat tie 1 arranged on the lower side of the slit 11 is expanded into a circular hole shape by the protruding portion 51 of the descending upper mold 5 while the peripheral portion of the slit is The circular portion 411 around the hole 42 of the jig 4 extends to form an annulus. As the upper mold 5 descends, the protruding portion 51 is inserted into the hole 211 formed by the inner end of the lower mold portions 21 and pressed in the lateral direction against the inclined surface 23 to lower the mold portion 21 They are moved outward in the radial direction along each guide member 215 provided on the bottom surface. At this time, the protrusion 51 of the upper mold is provided with a hole 211 to allow movement of the lower mold parts 21 outward in the radial direction. The ring clamp 3 is expanded by the lateral pressure when it is inserted into the furnace.

In this way, the slit 11 in the flat tie 1 is expanded and molded into a circular hole 13 for tie-pin binding, and then the upper mold is raised and lowered, as shown in FIG. 6, at this time the protrusion 51 of the upper mold As the pressing force in the lateral direction is removed, the ring clamp 3 is reduced and returns to the initial position in FIG. 4. Then, by removing the flat tie (1) from the groove of the bottom surface of the jig (4), the opposite slit is repeatedly expanded and repeated to form a circular hole (13) at both ends of the flat tie as shown in FIG. Will be easily molded.

The present invention reduces the manufacturing cost of the flat tie by manufacturing a flat tie having slits for binding wedge pins formed at both ends, and then shaping the slits into a circular shape to form a circular hole for tying a rod-shaped tiepin. Can improve productivity.

The present invention is used to maintain a gap between the formwork panels, a gap-holding mechanism in which a circular hole for tiepin binding is formed at both ends, and a slit for wedge-pinning from flat tie formed at both ends. Can be.

1: Flat tie 11: Slit
13; Round hole 2: lower mold
21: lower mold part 211: hole
22: groove 23: slope
3: Ring clamp 4: Jig
41: Home 42: Hall
5: Upper mold
51: protrusion

Claims (5)

In the flat tie (1) used as a gap maintaining tool for formwork, In the forming apparatus for the gap maintaining tool for dies, the slit (11) formed for binding the wedge pin is expanded and formed into a circular hole for tie-pin tying.
A lower mold (2) comprising a lower mold portion (21) with an inner end having an inclined surface in an arc shape so as to be divided into a plurality of holes and formed at the center;
Clamp means for retaining and engaging the lower mold parts (21) during expansion molding of a circular hole,
A jig (4) arranged on the upper side of the lower mold (2) to hold the flat tie (1) to be molded, and
The upper mold (5) operating up and down is formed with a protrusion (51) of a diameter that extends through the hole (42) of the jig and expands the slit (11) of the flat tie (1) disposed on the bottom of the jig into a circular hole. Forming apparatus for maintaining the gap for formwork, characterized in that it comprises.
According to claim 1,
The clamp means are disposed in the recess 22 formed on the outer circumferential surface of the lower mold parts 21, and when the protrusion 51 of the upper mold is inserted into the hole 211 of the lower mold during molding, the lower mold parts 21 It is a hydraulic ring clamp (3) that is extended to allow movement in the radial direction outwards.
According to claim 1,
Each of the lower mold parts 21 is formed with an inclined surface 23 on the outside of the part forming the central hole 211, and a guide groove 214 formed on the bottom surface of each lower mold part is fixed to the base. Forming device for holding the gap for the formwork, characterized in that to be engaged with the member 215 to move outward in the radial direction during molding.
The method of claim 1
The jig (4) is characterized in that the groove (41) into which the flat tie (1) to be molded is formed is formed on the bottom side, and the hole (42) formed into a diameter to be molded through the groove (41) is formed. Gap forming device for dies.
The method of claim 4,
In the groove 41 of the bottom surface of the jig 4, in the portion where the slit 11 of the flat tie 1 is located, when the slit is expanded circularly by the upper mold, the outer portions of the slit are also annular. An apparatus for forming a spacer for a formwork, characterized in that a circular portion 411 of an extended diameter is formed around a hole 42 formed in the groove 41 to allow expansion.

Images