KR101557303B1

KR101557303B1 - Method for forming groove of headrest stay

Info

Publication number: KR101557303B1
Application number: KR1020150092184A
Authority: KR
Inventors: 강필석
Original assignee: (주)조양
Priority date: 2015-06-29
Filing date: 2015-06-29
Publication date: 2015-10-05

Abstract

The present invention relates to a headrest stay groove forming method comprising a first step of positioning a headrest stay 4 on a lower fixing plate 8 and a second step of positioning the headrest stay 4 by sensing a stay 4 by a sensing unit 18, A second step of generating an automatic control signal to the control unit 20 and transmitting the automatic control signal to the control unit 20 to lower the pressurizing cylinder 22 so that the stay 4 is rotated by the fixed unit 6 composed of the lower fixed plate 8 and the upper fixed plate 10. [ A fourth step of raising the roller conveying cylinder 28 in a state in which the stay 4 is fixed and a fourth step of raising the roller conveying cylinder 28. At least one roller 34 A fifth step of raising the roller booth 36 provided with the roller booth 36 to form a groove in the stay 4 and a fifth step of raising the roller booth 36 by the roller conveying cylinder 28 with an automatic operation control signal by the control unit 20 And the upper fixing plate 10 is raised by the pressurizing cylinder 22 to be in an initial state And the sixth step of waiting for the head rest stay 4 to be formed, the groove forming step of the headrest stay 4 is simple and the working time is shortened and the production amount can be increased. Since the groove is formed by the cutting, It is easy to work because no scattering chip is generated by cutting.

Description

METHOD FOR FORMING GROOVE OF HEADREST STAY [0002]

The present invention relates to a headrest stay groove forming method and, more particularly, to a headrest stay groove forming method capable of reducing a manufacturing time by forming a groove in a short time.

In order to support and protect the occupant's head, the headrest generally has a groove on one side of the stay to adjust the height of the headrest according to the height of the occupant's head, do.

As a conventional technique for forming a groove in the headrest stay, there are disclosed a method of forming a groove for a headrest stay rod and a processing apparatus (prior art document 1) and a patent document 10-936385 , 'Headrest stay groove forming method and apparatus (prior art document 2) are published.

In the prior art document 1, grooves are formed by reciprocating the upper, lower and intermediate rollers several times while the stay is fixed, and grooves of the stay are formed by gradually increasing the reciprocating distance to minimize buckling and deformation of outer diameter.

However, in the prior art document 1, since a plurality of rollers must be reciprocated up and down in order to form grooves in the stay, it takes a long time to form the grooves, which results in a decrease in production.

In the prior art document 2, at the time of forming the grooves of the stay, the grooves are firstly cut by the cutter to form cutting grooves, and then the grooves are secondarily formed by rollers using the rollers of the roller molding machine.

However, in the prior art document 2, a lot of scattering chips are scattered due to the primary stab cutting by the cutter, which makes it difficult to work. Secondly, the roller is machined to form grooves, There is a falling problem.

Accordingly, it is an object of the present invention to provide a method of forming a headrest stay groove in which production time is reduced by minimizing a work process, and production of scattered chips by cutting is not generated.

According to the present invention, there is provided a headrest stay groove forming method comprising a first step of positioning a headrest stay (4) in a seating groove (12a) of a lower fixing plate (8) A second step of detecting a stay 4 located in the seating groove 12a by the control unit 18 and transmitting a control signal to the control unit 20; 20, the pressurizing cylinder 22 is lowered to fit the seating groove 12a of the lower fixing plate 8 and the seating groove 12b of the upper fixing plate 10 to form the stay 4 And a third process of fixing the roller conveying cylinder 28 by the automatic operation control signal of the control section 20 in a state where the movement of the stay 4 is restricted by the upper and lower fixing plates 10 and 8 A fourth step of raising the roller transfer cylinder 28, and a fourth step of increasing the diameter of the roller A fifth step of raising a roller booth 36 provided with at least one roller 34 and stepwise pressing one side of the stay 4 to form a groove; The roller conveying cylinder 28 is operated by the automatic operation control signal by the control unit 20 to lower the roller booth 36 and the pressuring cylinder 22 is operated to raise the upper fixing plate 10, And a sixth step of waiting for a task in a state of being in a state of being operated.

According to the present invention, since the groove forming process of the headrest stay is simple, the working time is reduced and the production amount can be increased. In addition, since the groove is formed by the pressing force without cutting the groove, It is easy to work.

1 is a perspective view of a headrest stay groove forming apparatus according to an embodiment of the present invention;
2 is a sectional view of a groove forming apparatus for a headrest stay according to an embodiment of the present invention,
3 is a view showing a configuration in which the multiple rollers of the present invention are installed,
4A to 4H are operational flowcharts for explaining a headrest stay groove forming method according to an embodiment of the present invention,
5 is a block diagram illustrating an automatic control configuration of a headrest stay groove forming method according to an embodiment of the present invention.
6 is a flowchart illustrating a headrest stay groove forming method according to an embodiment of the present invention,
7 is a view showing a configuration of a roller booth according to another embodiment of the present invention,

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a groove forming apparatus for a headrest stay according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a detailed configuration of a groove forming apparatus for a headrest stay according to an embodiment of the present invention, and FIG. 2 is a sectional view.

A groove forming apparatus for a headrest stay (4) according to the present invention comprises a body frame (2), a fixing part (6) for restricting movement of the stay (4) located inside the body frame (2) A roller booth 36 provided with at least one roller 34 for forming a plurality of grooves in the stay 4 fixed by the rollers 34 and a roller conveying cylinder 28 for conveying the roller booth 36 up and down, .

A headrest stay 4 for forming a groove is located in the main body frame 2 and a fixing portion 6 for restricting the movement of the stay 4 is provided on the upper and lower portions of the stay 4. [

The fixing part 6 includes a lower fixing plate 8 on which the stay 4 is mounted and an upper fixing plate 10 which is in contact with the stay 4 while descending from the upper part of the stay 4 placed on the lower fixing plate 8. [ .

The upper and lower fixing plates 8 and 10 are provided with seating grooves 12a and 12b so that the stay 4 can be placed at the same position on the upper and lower straight lines, The upper stay 10 is lowered and the stay 4 placed on the upper plate 12a is pressed and fixed.

A pressurizing cylinder 22 for pressurizing and fixing the stay 4 can be installed on the upper fixing plate 10.

The pressing cylinder 22 may be a hydraulic servomotor and the upper fixing plate 10 provided at the end portion may be lowered while the pressing portion 26 connected to the cylinder shaft 24 is lowered, And the stay 4 located in the seating groove 12a is pressed and fixed.

The roller booth 36 provided with the plurality of rollers 34 is operated once to form the groove in the headrest stay 4 whose movement is limited by the fixing portion 6 so that one side of the stay 4 The groove is formed by pressurization.

At least one roller 34 having different diameters is installed in the roller booth 36. The diameter of the roller 34 is formed to be larger and smaller as it goes from the upper portion to the lower roller 34 on the upper and lower straight line, And gradually protrudes toward the stay 4.

The increase in the diameter of the plurality of rollers 34 sequentially increases the pressure in the case of forming the grooves in the stay 4, which causes the grooves to be stepwise formed in the stay 4 by the sequential pressing, This is a shrinking effect.

When one side of the stay 4 is pressed by using the roller 34 having a large diameter from the beginning to form the groove in the stay 4, a large pressure momentarily is applied to the stay 4 and the groove of the stay 4 is distorted, It can not be.

The stepwise pressurization of the roller 34 is performed at a low pressure at the beginning, and the pressure is gradually applied to the stay 4, so that an unreasonable pressure is not applied to the stay 4 at once.

The roller booth 36 provided with the plurality of rollers 34 is vertically operated by the lower roller conveying cylinder 28 to form a groove in the stay 4. [

The roller conveying cylinder 28 has a roller conveying plate 32 for vertically conveying the roller booth 36. A cylinder shaft 30 is connected to both ends of the roller conveying plate 32, 36 are vertically conveyed.

In the present invention, the roller booth 36 provided with a plurality of rollers 34 is moved upward by the roller feed cylinder 28 to form a groove in the stay 4 fixed to the fixing portion 6, It is possible to form the groove by operating one time upward so that the working time can be minimized.

As a preferred embodiment of the present invention, six rollers 34 are provided in the roller booth 36, and each roller 34 has a diameter of? 23.1 mm, 23.6 mm, 24.1 mm, 24.6 mm, 25.3 mm, 26.1 mm And the time for forming the groove in the stay 4 by operating the roller booth 36 once upwards is about 6 seconds. When the groove is formed in the stay 4 by reciprocating several times in the conventional manner The operation efficiency is excellent compared with the case where the operation time is about 16 seconds.

Since the stay 4 of the present invention can be fixed to the side seating grooves 12a and 12b formed on the upper and lower fixing plates 8 and 10 in the shape of a ' It is also possible to form grooves on both sides of the stay 4 by a single operation.

The roller feed cylinder 28 may be a hydraulic servomotor.

3 shows a configuration of a roller booth 36 provided with a plurality of rollers 34 according to the present invention. The roller booth 36 of the present invention is provided with a plurality of rollers 34, ) Are vertically arranged in a zigzag manner.

A plurality of rollers 34 may be provided on one shaft 38 of the roller booth 36. In a preferred embodiment of the present invention, six roller shafts 38 are vertically installed on the roller booth 36 Four rollers 34 are provided on each shaft 38 and eight rollers 34 having the largest diameter are provided on the shaft 38 provided at the lowermost end of the roller booth 36.

The configuration of the roller booth 36 will be described in detail. The roller booth 36 is provided with eleven shafts 38 in the transverse direction in order to install a plurality of rollers 34 therein.

Four rollers 34 are provided for one shaft 38 in the transverse direction of the roller booth 36 and eight rollers 34 are provided on the lowermost shaft 38 among the eleven shafts 38, The four rollers 34 provided on the shaft 38 are spaced apart from each other with a space enough to install one roller 34 in the transverse direction.

After the rollers 34 are disposed on the uppermost end of the roller booth 36, the rollers 34 are disposed on the longitudinally disposed shafts 36, And arranged in a staggered manner in the vertical direction so that the lower roller 34 is positioned in the spacing space of the arranged rollers 34. [

Six rollers 34 are arranged in eight rows in the longitudinal direction of the roller booth 36 and the tenth shaft 38 is provided on the shaft 38 with respect to the position of the roller 34 disposed on the uppermost shaft 38. [ (34) arranged in the upper and lower zigzags.

As described above, eight rollers 34 are provided on the lowermost shaft 38.

The positions of the shafts 38 on which the rollers 34 are disposed are the same and the grooves are sequentially formed deeply in the stays 4 as the rollers 34 are vertically arranged so that the diameters of the rollers 34 gradually increase, In order to prevent a large amount of pressure from being applied at one time during the groove forming process.

The roller 34 provided on the shaft 38 is installed so as to be located in the left and right zigzags so as to apply pressure to the stay 4 so that the groove The pressure applied to the shaft 38 is transmitted to the four rollers 34. [

This is because, as compared with the case where eight rollers 34 are installed on one shaft 38 and the pressure is distributed, unreasonable pressure is not transmitted to the shaft 38, thereby preventing damage to the machine.

The lowermost shaft 38 on which the roller 34 having the largest size among the rollers 34 installed in the roller booth 36 is provided is provided with eight rollers 34 as finishing steps of the groove forming operation of the stay 4 And since a large pressure is not applied due to the last stage of the groove forming process, the eight rollers 34 may be provided on one shaft 38.

In the present invention, the rollers 34 installed in the roller booth 36 are divided into upper and lower parts with respect to the intermediate support part 42, and three rollers 34 are provided, Th < / RTI > shaft 38 and the 7 < th > This is because the four rollers 34 disposed on the respective shafts 38, which are temporarily subjected to pressure during the stay 4 groove forming, are divided into upper and lower portions so as to receive an even pressure so that the pressure applied to the roller booth 36 is dispersed, (36).

That is, it is possible to prevent the roller booth 36 from being bent in the lateral direction by the intermediate support portion 42, so that all the rollers 34 apply pressure evenly to the stay 4, thereby reducing defects.

7 shows another embodiment of the roller booth 36 in which the shaft 38 is provided at the rear of the shaft 38 on which the rollers 34 are installed, And an elastic member 40 for allowing the shaft 38 to be pushed inward by the pressure and returning to the original position after the shaft 38 is secured.

The elastic member 40 prevents an unreasonable pressure from being applied to the roller booth 36 provided with the roller 34 by a sudden pressing force when the stay 4 is pressed by the roller 34. [

The shaft 38 is pushed backward by the elastic member 40 and the shaft 38 temporarily pushed backward is pressed against the stator 4 by the resilient member 40, So that the groove 4 is formed by applying pressure to the stay 4 while returning to its original position.

The elastic member 40 may be a compression spring, a leaf spring, or the like. Alternatively, a separate cylinder may be installed at the rear of the shaft 38 so that elasticity may act according to the pressure transmitted.

4 is a flow chart for explaining a headrest stay groove forming method according to an embodiment of the present invention, and FIGS. 4A to 4H are process drawings showing the same.

4A is a state in which the stay 4 is positioned in the seating groove 12a of the lower fixing plate 8 as an initial state and when the stay 4 is positioned in the seating groove 12a, The upper fixing plate 10 is lowered by the cylinder 22 to fix the movement of the stay 4.

The roller 4 is fixed by the upper and lower fixing plates 8 and 10 and the roller conveying cylinder 28 moves the roller booth 36 provided with the plurality of rollers 34 upward to move the stay 4, .

4C to 4H, grooves are formed in the stay 4 by stepwise pressurization by a plurality of rollers 34 whose diameters are sequentially increased, and the rollers 36 are lifted up by one time 4).

After completion of the groove forming process on the stay 4, the lower roller conveying cylinder 28 is lowered to be in an initial state, and the upper pressure cylinder 22 also ascends to release the fixing of the stay 4, .

5 shows the automatic control configuration of the groove forming apparatus of the headrest stay 4. In the present invention, the sensing unit 18 is provided on one side of the seating groove 12a of the lower fixing plate 8 on which the stay 4 is seated. And the sensing unit 18 may be a photosensor.

The sensing unit 18 senses that the stay 4 is positioned in the seating groove 12a and when the stay 4 is placed in the seating groove 12a, the sensing unit 18 senses the stay 4, To control the lower roller transfer cylinder 28 to rise for a predetermined period of time to control the forming of the groove in the stay 4 by transmitting a control signal to the pressure cylinder 22 have.

After forming the groove in the stay 4 by the roller 34, the control unit 20 transmits a control signal so that the upper pressure cylinder 22 and the lower roller transfer cylinder 28 can be placed in the initial position again If the stay 4 is removed after completion of the work, the sensing unit 18 confirms whether the stay 4 is placed in the seating groove 12a for the next process.

According to the present invention, since the sensing unit 18 confirms whether the stay 4 is in the working position, the operation is started to be safely performed, and the operation can be performed efficiently by operating the automatic control.

Hereinafter, a groove forming method of the headrest stay 4 according to an embodiment of the present invention will be described with reference to FIG.

The headrest stay 4 to be formed with the groove is placed in the seating groove 12a formed in the lower fixing plate 8 and the sensing portion 18 provided in the seating groove 12a of the lower fixing plate 8 It is confirmed that the stay 4 is placed on the lower fixing plate 8. [ After sensing that the stay 4 is positioned in the seating groove 12a by the sensing unit 18, the control unit 20 transmits a signal to control the operation of the pressure cylinder 22 and the roller conveying cylinder 28 do.

The operation of the pressurizing cylinder 22 by the control unit 20 is controlled by the upper pressurizing cylinder 22 in the state where the stay 4 is placed in the seating groove 12a of the lower fixing plate 8 The upper fixed plate 10 is lowered while being lowered, and the stay 4 is fitted to the seating groove 12b, thereby restricting the movement.

The control unit 20 transmits an operation control signal to the roller conveying cylinder 28 in a state where the movement of the stay 4 is fixed by the engagement of the upper and lower fixing plates 8 and 10, The roller booth 36 is lifted up by the plurality of rollers 34 installed with the diameter increasing sequentially from the upper part to the lower part and the roller booth 36 is raised by one time, 4) are pressed to form the grooves stepwise.

After the groove forming of the stay 4 is completed by the plurality of rollers 34, the roller conveying cylinder 28 lowers the roller booth 36 to be placed in the initial state, The clamping plate 10 is lifted to release the pressure-clamped state and to be placed in the initial state.

In the initial state, the sensing unit 18 is in a waiting state until it is confirmed that the stay 4 is positioned in the seating groove 12a of the lower fixing plate 8. When the stay 4 is manually controlled, It is also possible to carry out an operation of forming a groove in the groove.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be determined by the scope of claims and equivalents thereof.

(2) - Main frame (4) - Stay
(6) - fixing part (8) - lower fixing plate
(10) - upper fixing plate (12a) (12b) - seat groove
(18) - sensing section (20) - control section
(22) -pressure cylinder (24) -cylinder shaft
(26) - pressing portion (28) - roller feeding cylinder
(30) - Cylinder shaft (32) - Roller transfer plate
(34) - Roller (36) - Roller booth
(38) - shaft (40) - resilient member
(42) - intermediate support

Claims

In a headrest stay groove forming method,
A first step of positioning the headrest stay 4 in the seating groove 12a of the lower fixing plate 8 in a standby state,
A second step of detecting a stay 4 positioned in the seating groove 12a by the sensing unit 18 and transmitting a control signal to the control unit 20;
The control unit 20 generates an automatic operation control signal by using the control signal transmitted from the sensing unit 18 and then moves down the pressure cylinder 22 to move the seating groove 12a of the lower fixed plate 8 and the upper fixed plate A third step of securing the stay 4 by the fit-engagement of the seating groove 12b of the seat 10,
A fourth step of raising the roller conveying cylinder 28 by an automatic operation control signal of the control unit 20 in a state in which the movement of the stay 4 is restricted by the upper and lower fixing plates 10 and 8,
The roller booth 36 provided with at least one roller 34 whose diameter increases stepwise from the upper part to the lower part is raised by the rising of the roller conveying cylinder 28 so as to press the one side of the stay 4 stepwise, A fifth step of,
After completing the groove forming of the stay 4 by the roller 34, the roller conveying cylinder 28 is operated by the automatic operation control signal by the control unit 20 to lower the roller booth 36, The upper fixing plate 10 is raised to wait for an initial state of operation,
The roller booth 36 of the fifth process is provided with a plurality of shafts 38 for installing the rollers 34 in the transverse direction and the shaft 38 is provided with a pressure- Four rollers 34 are provided in the transverse direction and six rollers 34 are provided on the upper and lower straight lines. The diameter of the rollers 34 gradually increases from the upper portion to the lower portion, and is set to be staggered vertically and horizontally. And the intermediate support portion 42 for dispersing the applied pressure by dividing the roller booth 36 into the upper and lower portions is formed on the shaft 38 provided at the lowermost end of the roller support 36. [ Stay groove forming method.

The method according to claim 1,
In the fifth step, six rollers 34 having diameters of 23.1 mm, 23.6 mm, 24.1 mm, 24.6 mm, 25.3 mm and 26.1 mm are formed in the stays 4, Headrest stay groove forming method.

The method according to claim 1,
A plurality of rollers 34 are vertically and horizontally arranged in a staggered manner on a plurality of shafts 38 provided in the roller booth 36 and a plurality of rollers 34 are provided in the stays 4 by a single operation of the roller booth 36 Wherein the groove of the head stay stay groove is formed.

The method according to claim 1,
A method of manufacturing a headrest stay groove forming method, comprising the steps of: confirming whether a stay (4) is positioned in a seating groove (12a) of a lower fixing plate (8) through a sensing unit (18) .