KR100547026B1 - Joint hole forming method of tie-bar for form and joint hole extension forming apparatus thereof - Google Patents

Abstract

The present invention relates to a method for forming a fastening hole for a formwork tie bar and a fastening hole expansion molding device thereof, and more particularly, to a buried type bar that is installed in a buried form to maintain a gap between two formwork plates during a construction work or a civil engineering work. A method for forming a fastening hole for a tie bar and a fastening hole expansion molding apparatus comprising a forming means for laterally expanding a fastening hole portion formed inside at least one end portion.

That is, the process of cutting the iron plate material provided to a predetermined length in a small,

"형으로 천공하는 공정과, The expansion molding hole and the expansion guide hole inside one end or both ends of the iron plate material cut by the above process "

"The process of drilling into a mold,

The punched iron sheet material is elastically squeezed in the upward direction and a rod-shaped pressurized rod having an inclined contact end portion having a lower end of the "V" shape enters the expansion molding hole vertically to expand laterally. A method of forming a fastening hole for a formwork tie bar, characterized in that the expansion of the fastening hole of the tie bar, and the fastening hole expansion molding apparatus of the tie bar.

Tie bar, tightening hole, expansion molding hole, pressure bar, horizontal plate, pressure plate

Description

JOINT HOLE FORMING METHOD OF TIE-BAR FOR FORM AND JOINT HOLE EXTENSION FORMING APPARATUS THEREOF}

Figure 1 (a) (b) is a plan view showing a general configuration of the tie bar to which the present invention is applied

Figure 2 is a partially cutaway plan view of the iron plate material for forming the tie bar of the present invention

Figure 3 is a plan view of the perforated hole formed in the inner side of one end of the iron plate material in Figure 1

4 is a plan view showing a fastening hole formed by using the drilling hole of FIG.

Figure 5 is a longitudinal cross-sectional view showing a molding apparatus of the present invention

6 is an exemplary view showing a molding process by the molding apparatus of the present invention.

7 is a plan view of a horizontal plate portion of the present invention

FIG. 8 is a plan view of a state where the iron plate material is placed on the horizontal cross-section portion of FIG. 6; FIG.

9 is an exemplary view when forming a fastening hole with a pressure rod in FIG.

* Explanation of symbols for main parts of the drawings

10: tie bar 12: fastening hole

14 steel plate material 14a width

16: expansion molding hole 18: expansion guide hole

20: support table 22: guide

24,24 ': Horizontal plate 26.26': Split section

26a: sloped surface 28: spring

30: lifting platform 32: pressure plate

32a: Hungji guide groove 34: Hollow part

36: pressure rod 36a: contact end

38: spring

The present invention relates to a method for forming a fastening hole for a formwork tie bar and a fastening hole expansion molding device thereof, and more particularly, to a buried type bar that is installed in a buried form to maintain a gap between two formwork plates during a construction work or a civil engineering work. A method of forming a fastening hole for a tie bar, comprising a forming means for laterally expanding a fastening hole portion formed in at least one end portion, and a fastening hole expansion molding apparatus thereof.

In general, tie bars used for formwork installation are embedded in the formwork between the two formwork boards so that the concrete structure can be constructed as a means to maintain the gap.

That is, the tie bar has a structure in which the entire body is placed in the die plate and fastened by a fastening support hole inserted into the die plate through the die plate, or a fastening hole is formed at one end or both ends of the tie bar to form the die plate. There are various forms such as the configuration of penetrating and protruding outward and then fastening with fastening pins.

Among them, the tie bar used in the present invention is related to the fastening hole which is formed to insert the wedge-shaped fastening pin by forming a fastening hole at one end or both ends, and in the related art, the tie bar has a predetermined length when making such a tie bar. Tie bar is formed by increasing the cutting width of the steel plate material provided, or by forming the tie bar by cutting the iron plate material cutting width of the fastening hole part of the tie bar and cutting the remaining part small. There is a problem that the increase in the use of the manufacturing cost will lead to an increase.

In order to solve the above problems, the present invention provides a process of cutting the iron plate material in small width, drilling the expansion molding hole and the expansion guide hole in one side or both ends cut by the process, and drilling through the process. The present invention provides a molding method in which a fastening hole and a sheet metal material are expanded by means of lateral expansion of a perforation hole by means of pressurizing a rod into the hole and pressing the iron plate material by a pressure plate, and a fastening hole expansion molding apparatus.

The present invention relates to a method of forming a fastening hole in which a wedge-shaped fastening pin is fitted to at least one end of a tie bar installed between two formwork plates to maintain a gap, and an apparatus for expanding the fastening hole.

Hereinafter, the method of forming the tie bar fastening hole of the present invention will be described in detail.

Cutting the iron plate material 14 provided at a predetermined length into a small width 14a;

"형으로 천공하는 공정과, 상기 천공된 철판소재(14)를 상방향에서 탄성압지시킨 다음 확장성형구멍(16)에 하단이 "V"자형으로 된 경사접촉단부(36a)을 갖는 봉상의 가압봉(36)을 수직으로 진입하여 측부확장하는 체결구멍 성형공정에 의해 체결구멍(12)부분의 철판소재(14)가 함께 확장되게 한 수단으로 타이바아(10)의 체결구멍(12)이 성형되게 한다.The expansion molding hole 16 and the expansion molding hole 16 having a straight length equal to the diameter of the fastening hole 12 of the tie bar 10 in one side end or both ends of the iron plate material 14 cut by the above process. ) On one side, the expansion guide hole 18, which is narrower than the expansion molding hole 16, is "

&Quot; the process of punching in the shape of a mold, and pressing the rod-shaped material having the inclined contact end portion 36a having the lower end of the “V” shape in the expansion molding hole 16 after elastically pressing the punched sheet metal material 14 upwardly. The fastening hole 12 of the tie bar 10 is formed by means of allowing the iron plate material 14 of the fastening hole 12 to be expanded together by a fastening hole forming process in which the rod 36 is vertically extended and laterally expanded. To be.

The expansion guide hole 18 performs a function of facilitating side expansion of the expansion molding hole 16, but is formed in the fastening molding hole 16 to be fitted into the expansion molded fastening hole 12. When the pull plate is pulled outwardly, it is not affected by the expansion guide hole 18 and has a smooth pulling support state.

And described in detail the fastening hole expansion molding apparatus of the tie bar according to the present invention.

The upper forming apparatus is lifted and lowered to the lower forming apparatus, and the horizontal plates 24 and 24 'divided into two sides on the upper table 20 are moved horizontally along the guide 22, but the horizontal plates ( 24) The inclined guide surfaces 26a are formed at the centers of the divided sections 26 and 26 'above the 24', respectively, and springs 28 are provided at both ends of the divided sections 26 and 26 ', respectively. A lower molding apparatus configured to be supported and a pressing plate 32 elastically supported by a spring 38 at the lower end of the elevating operation table 30 are installed, and a “V” shape is formed at the hollow portion 34 in the center of the pressing plate 32. It is a lower molding apparatus configured to penetrate through the rod-shaped pressure bar (36) having an inclined contact end portion (36a) of the inclined contact end portion (36a).

In the center of the pressing plate 32 is formed a gripping guide groove (32a) for supporting the iron plate material 14, the inclined contact end portion 36a of the pressure bar 36 is above the horizontal plate 24 (24 ') It is formed in the same direction as the divided sections 26 and 26 ', so as to be easily accessible between the divided sections 26 and 26'.

"형으로 천공한 다음 그 천공된 철판소재(14)를 성형장치에 구비된 수평대판(24)(24')의 분할단면(26)(26')부분에 재치시키되 분할단면(26)(26')중앙의 경사안내면(26a)에 철판소재(14)의 확장성형구멍(16)이 놓여지게 한 다음 승강작동대(30)를 하강시키게 되면 먼저 가압대판(32)에 의해 수평대판(24)(24')에 놓여진 철판소재(14)를 상하에서 탄성압지하게 되고 이어서 가압봉(36)의 일자형 경사접촉단부(36a)가 확장성형구멍(16)과 분할단면(26)(26')의 경사안내면(26a)을 통해 분할단면(26)(26')을 사이로 진입하는 수단으로 확장성형구멍(16)을 측부확장함과 아울러 그 확장성형구멍(16)부분의 철판소재(14)를 측부확장시키는 수단으로 타이바아(10)의 체결구멍(12)을 성형하게 된다.In the present invention, the expansion molding hole 16 and the expansion guide hole 18 at the ends of the iron plate material 14 "

&Quot; and then the perforated iron plate material 14 is placed on the divided sections 26, 26 'of the horizontal base plate 24, 24' provided in the forming apparatus, and divided sections 26, 26 When the expansion molding hole 16 of the steel plate material 14 is placed on the inclined guide surface 26a of the center, and then the lifting operation platform 30 is lowered, the horizontal plate 24 is first pressed by the pressing plate 32. The steel plate material 14 placed at 24 'is elastically pressed up and down, and then the straight inclined contact end portion 36a of the pressure rod 36 is formed of the expansion molding hole 16 and the divided end surfaces 26 and 26'. Lateral expansion of the expansion molding hole 16 as a means for entering the divided sections 26, 26 'through the inclined guide surface 26a, and the steel plate material 14 at the portion of the expansion molding hole 16 side. As a means for expanding, the fastening hole 12 of the tie bar 10 is formed.

That is, by using a narrowly cut iron plate material 14, the fastening hole 12 of the tie bar 10 and the iron plate material 14 of the fastening hole 12 part is expanded.

In the above, the present invention has been described with reference to the above embodiment, but various modifications can be made within the technical scope of the present invention.

As described above, the present invention provides a fastening hole as a means for expanding the fastening portion of the tie bar by using a narrow iron plate material by a method of forming a fastening hole for a formwork tie bar and a fastening hole expansion molding apparatus. There is an effect that can greatly increase the competitiveness of the product.

Claims (2)

Narrowly cutting the iron plate material provided to a predetermined length; The expansion molding hole and the expansion guide hole inside one end or both ends of the iron plate material cut by the above process "

"The process of drilling into a mold, The punched iron sheet material is elastically squeezed in the upward direction and a rod-shaped pressurized rod having an inclined contact end portion having a lower end of the "V" shape enters the expansion molding hole vertically to expand laterally. Forming fastening hole forming form of tie bar, characterized in that for forming the fastening hole of the tie bar The upper forming apparatus is moved up and down by the lower forming apparatus, and the horizontal base plates 24 and 24 'divided on both sides of the upper table 20 are moved horizontally along the guide 22 and the horizontal base plate ( 24) The inclined guide surface 26a is formed in the center of the divided sections 26 and 26 'above the 24' and the springs 28 are provided at both ends of the divided sections 26 and 26 ', respectively, to support the inward elasticity. The lower forming apparatus, A pressure base plate 32 elastically supported by a spring 28 is installed at the lower end of the elevating operation platform 30, and the inclined contact end portion 36a having a “V” shape is formed at the hollow portion 34 in the center of the pressure base plate 32. Fastening hole expansion molding apparatus of the tie bar for the formwork, characterized in that the upper forming device is installed so as to penetrate through the pressing rod 36 having the divided section 26, 26 '

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