KR101685756B1

KR101685756B1 - Floor hinge for piston rod manufacturing method

Info

Publication number: KR101685756B1
Application number: KR1020140078602A
Authority: KR
Inventors: 김정규
Original assignee: 김정규
Priority date: 2014-06-26
Filing date: 2014-06-26
Publication date: 2016-12-12
Also published as: KR20160001011A

Abstract

The present invention is intended to provide a manufacturing method capable of reducing the manufacturing cost of a piston rod for a floor hinge, and it is characterized in that a piston rod body is manufactured with a seamless pipe and a knuckle member is manufactured by a round bar and manufactured by mutual assembly.
According to the present invention, the manufacturing cost of the piston rod body used for the floor hinge is made of a seamless pipe and the knuckle member is assembled, so that the manufacturing cost and the raw material cost can be reduced, The present invention is expected to have an effect of seeking economical benefit as it can reduce manufacturing time and shorten product manufacturing time while greatly reducing facility cost.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a method of manufacturing a piston rod for a floor hinge,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a piston rod for a floor hinge, and more particularly, to a method of manufacturing a piston rod for a floor hinge, which can improve productivity of a piston rod used for a floor hinge To a method of manufacturing a piston rod for a floor hinge.

As known, a floor hinge is used for opening and closing a door of a door installed at an entrance of a building. The floor hinge is embedded in a concrete floor and a door is installed on the hinge shaft to open the door artificially and then to be closed again. Is configured to perform the floor hinge.

As described above, in order to operate the floor hinge, there is provided a cam operation chamber having an opening at an upper side of one side thereof and a cylinder having an insertion hole formed at the other rear end communicating therewith, and a piston rod, a spring, and oil are charged into the cylinder, To close the door.

A configuration of a piston rod installed inside a cylinder will now be described in order to achieve the above-described operation.

The piston rod is formed with a long hole so that a spring and a small piston can be loaded therein. In the front portion, a plate seating portion for fixing the plate installed on the upper side and the lower side of the cam provided on the hinge shaft, The knuckle member is integrally formed.

In the method of manufacturing a piston rod having the above-described structure, a round rod having a predetermined diameter is prepared, a slot is formed in the center so that the spring and the small piston can be loaded, and the upper and lower portions of the tip are pressed to form a plate seating portion A knot member having a fixing hole and a roller seat portion is formed and then integrally finished or a round bar having a diameter as large as the width of the knuckle member is prepared to form a plate seating portion, a fixing hole and a roller seat portion, .

According to the manufacturing method of the piston rod as described above, the cost of purchasing raw materials, machining time, machining cost and machining cost are increased, and the productivity of the product is greatly reduced, There is a problem of low competitiveness.

Korean Patent Laid-Open No. 10-2002-0034137 (published on May 08, 2002) Korean Patent Publication No. 10-1995-0032970 (published on December 22, 1995) Korean Public Practice 20-2000-0007983 (Published May 06, 2000)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to provide a piston rod for a floor hinge capable of preventing the function of a piston rod for a floor hinge from being deteriorated, The present invention has been made in view of the above problems.

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A method of manufacturing a piston rod according to the present invention comprises grinding an inner surface of a seamless pipe, forming a pin hole (3) in the rear of the seamless pipe, forming a groove (5) A knuckle member having a packing groove and a male threaded portion is manufactured at the rear side of the piston rod body, and a packing formed on the knuckle member The present invention is characterized in that after the packing is joined to the groove, the male screw portion formed on the knuckle member is fastened to the female screw portion formed on the front of the piston rod body.

According to the present invention, the manufacturing cost of the piston rod body used for the floor hinge is made of the seamless pipe, and the knuckle member is assembled, so that the manufacturing cost and the raw material cost can be reduced, ,

In addition, since the machining time of the product can be shortened and the productivity can be improved while greatly reducing the equipment cost, it is an invention that can be expected to achieve economical benefit.

1 is an overall perspective view of a piston rod for a floor hinge according to the present invention;
2 is an exploded perspective view of a piston rod for a floor hinge according to the present invention.
3 is an assembled cross-sectional view of a piston rod for a floor hinge according to the present invention

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A method of manufacturing a piston rod for a floor hinge according to the present invention will be described.

First step

The piston rod body 1 is prepared by cutting a seamless pipe to a predetermined length.

Second Step

The inner surface of the pipe is polished so that the spring and the small piston can be loaded into the inside of the piston rod body.

Third step

A piston hole mounting pin hole 3 is formed in the rear of the piston rod main body and a ring groove 5 is formed on the inner surface of the piston rod main body. A female screw portion 4 is machined on the inner surface of the front surface of the piston rod main body to complete the piston rod main body 1 (The second process and the third process may be replaced by the process sequence.)

Fourth step

The knuckle member 20 is prepared by preparing a round bar with a predetermined size. A plate seating portion 21 is formed on the upper and lower sides of the knuckle member 20 and the plate fixing pin hole 22 and the roller seating groove portion 23 are processed.

Step 5

After the fourth step, the packing groove 24 and the male screw portion 25 are formed in the rear, and the packing is joined to the packing groove, thereby completing the knuckle member 20.

Step 6

The male screw portion 25 formed on the knuckle member 20 is fastened to the female screw portion 4 formed on the piston rod body 1 and assembled to complete the piston rod for the floor hinge.
The piston rod for a floor hinge completed in accordance with the above-described process is manufactured by processing the center portion of a conventional round bar to make a pipe because the piston rod body 1 is manufactured by a seamless pipe, Can be reduced.
The knuckle member 20 coupled to the female screw portion 4 formed on the piston rod body 1 constructed as described above can be provided with durability required as a knuckle member since it is manufactured by machining a round bar.
The male screw portion 25 constituting the knuckle member 20 is formed as a single body by fastening the female screw portion 4 formed on the piston rod main body 1 and the piston rod 10 is always rotated The knuckle member 20 is not loosened from the piston rod main body 1 and can maintain a firm connection state.
Since the packing 26 is engaged with the packing groove 24 formed in the knuckle member 20, the spring and the small piston are charged into the slot 2 formed in the piston rod body 1, The oil can be prevented from flowing out between the female screw portion and the male screw portion when the oil pressure function is performed.

1: piston rod body 2: long hole
3: Pin hole 4: Female threads
5: groove 10: piston rod
20: Knuckle member 21: Plate seat part
22: plate fixing pin hole 23: roller seating groove portion
24: packing groove 25: male thread portion

Claims

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Cutting the shimless pipe to a predetermined length and polishing the inner surface of the shimless pipe for loading the spring and the small piston therein;
Forming a piston hole mounting pin hole in the rear of the seamless pipe, forming a groove in an inner surface of the piston, and forming a female threaded portion for fastening a knuckle member on a front inner surface of the piston, thereby completing the piston rod main body.
Preparing a round bar with a predetermined size, forming a plate seating portion on the upper and lower sides of the front side, machining the plate fixing pin hole and the roller seating groove portion; And a knuckle member forming a packing groove and a male screw portion at the rear side;
And coupling the packing to the packing groove formed in the knuckle member and fastening the male screw portion constituting the knuckle member to the female screw portion formed in the piston rod body.