KR100749330B1 - Device and block for forming groove of stay for headrest - Google Patents

Abstract

A device for forming a groove of a stay of a headrest is provided to improve productivity by forming grooves of stays of plural headrests at the same time. A device includes a slide base(220), a slider(240) disposed to the upper surface of the slide base to move in a straight-line motion by a first hydraulic cylinder(201), a left clamp holder(271) fixedly installed on the slider to communicate with the slider for clamping one surface of a stay of a headrest, and a right clamp holder(272) connected to the left clamp holder in the central axis of a shaft which is connected to a second hydraulic cylinder(202) and communicates with the left clamp holder for clamping the other surface of the stay of the headrest.

Description

Stay groove forming device and groove forming block for headrests {DEVICE AND BLOCK FOR FORMING GROOVE OF STAY FOR HEADREST}

Figure 1a shows a front view of the head groove stay groove forming equipment according to the present invention,

Figure 1b shows a left side view of the stay groove forming equipment for headrests according to the present invention,

Figure 2 shows a front view of the stay groove forming apparatus for fixing the stay for the headrest according to the invention,

3 is a stay groove forming apparatus shown for explaining the process of forming a stay groove for a headrest according to the present invention,

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Figure 4 shows a first embodiment of a groove forming block forming a stay groove for a headrest according to the present invention,

5 shows a second embodiment of a groove forming block forming a stay groove for a headrest according to the present invention,

Figure 6a shows a third embodiment of the groove forming block forming the stay groove for the headrest according to the present invention,

FIG. 6B shows the roller of the groove forming block shown in FIG. 6A.

<Explanation of symbols for main parts of the drawings>

110; Body 120; Control panel

130; Groove forming apparatus 140; Operation panel

150; Rotary drive unit 151; Main shaft

160; Drive motor 170; Hydraulic tank

180; Stay 190 for headrest; Groove forming block

201, 202; Hydraulic cylinder 210; Lower base

220; Slide bases 231, 232; Stopper

240; Slider 250; Slider cover

260; Slide bases 271, 272 for clamp holders; Clamp holder

290; Groove forming blocks 410, 510, 610; Shaft coupling groove

420, 520, 620; Extracorporeal 420a, 520a; Rectangle projection

420b, 520b; Inclined protrusion 620a; Rectangle Roller

620b; Inclined roller 530; bearing

The present invention relates to a headrest stay of a seat back, and more particularly, to a stay groove forming apparatus and a groove forming block for a headrest of a seat back.

In general, the headrest of the seat is a pillow-like part installed to support the head on the seat back, which is the back of the seat, and usually supports the head comfortably while preventing the injury of a person's neck and head. It is a configuration that is mounted to make.

In general, the headrest may be integrated with the seat, but the height of the headrest may be adjusted while being detachably provided.

The headrest is provided with a stay integral to the bar headrest which is provided to be capable of lifting and detaching at the upper part of the seat back, and the stay is usually made of a metal pipe.

The stay is formed in parallel with both guides in a 'c' shape, and a plurality of grooves are formed on the outer circumferential surface of one side end of the guide of one side to adjust the lifting height of the headrest, and at the same time, the head is formed by the lower end of the lower head. It will be responsible for the rest stop function.

The following methods are used for forming the groove in the headrest stay.

There is a method of forming a groove by cutting one end of the stay, but the processing of residues of cutting oil used in the cutting process is an environmental problem. In the case of cutting, not only the cutting but also the end of the cutting surface immediately after cutting There is also an uneconomical problem that the productivity is reduced while taking a lot of work time because the polishing process to polish the part.

Another method is to form a stay groove using a mold.

By using the upper mold, the lower mold and the auxiliary mold, the lower mold is combined with the upper mold, and the auxiliary mold inserted into the lower mold has a protrusion at the upper portion corresponding to the groove to be formed in the stay, so that the upper mold is lowered. By moving, the upper mold presses the stay to the lower mold side. When the upper mold descends to the lower mold and the stay is pressed therebetween, the projection of the auxiliary mold is brought into close contact with the outer peripheral surface of the bottom side of the stay. At this time, the core member is inserted into the stay so as not to be deformed in the grooveless portion of the stay, the core member is provided with a groove corresponding to the stay groove to form a groove on the outer peripheral surface of the stay.

The method using such a mold has the advantage that there is no problem of the occurrence of insulating oil residue and can be processed by a simple process, compared to the above-mentioned cutting process, but in general, the size of the headrest stay is not constant (that is, Size, size of grooves, number of grooves, distance between grooves, etc.) There is a problem in terms of economic efficiency and efficiency since the upper mold, lower mold, auxiliary mold and core member must be separately provided for each stay gem product standard.

SUMMARY OF THE INVENTION An object of the present invention for solving the above-described problems is to provide a stay groove forming apparatus and a groove forming block used therein, which can easily form a groove of a headrest stay.

Another object of the present invention is to provide a stay groove forming apparatus capable of forming a stay groove for a headrest more precisely, and a groove forming block used therein.

Still another object of the present invention is to provide a stay groove forming apparatus and a groove forming block used therein, which are capable of simultaneously increasing the productivity and economy by forming grooves of a plurality of headrest stays at the same time.

In order to achieve the above object, a headrest stay groove forming apparatus according to the present invention includes a slide base; A slider positioned on an upper surface of the slide base and linearly moving by a first hydraulic cylinder; A left-clamp holder fixed to the slider and interlocked with the slider to clamp one surface of the headrest stay; The linear movement is performed by a second hydraulic cylinder, connected to the left-clamp holder with a central axis of the clamp holder shaft connected to the second hydraulic cylinder, interlocked with the left-clamp holder, and the other surface of the stay for the headrest. It comprises a; a right-clamp holder for clamping.

Here, the stay groove forming apparatus for the headrest is located in the upper direction of the left-clamp holder and the right-clamp holder, the stay groove forming block rotated by the main shaft formed in a direction perpendicular to the clamp holder shaft. It is made to include more.

Here, stoppers are formed on both left and right sides of the slider base, and each of the stoppers has a sensor at positions corresponding to the left and right sides of the slider so as to accurately measure the moving distance of the slider slid by the first hydraulic cylinder. It is preferable to attach.

Here, the stay groove forming apparatus for the headrest is located on a horizontal support of the body having a power supply, a control or operation panel and a hydraulic tank, the horizontal support is at least two stay groove forming apparatus for the headrest It is more preferable to implement so that.

In addition, the stay groove forming block for a headrest according to the invention, the shaft connecting groove for connecting with the shaft on the inner peripheral surface; A rectangular projection for forming a rectangular groove for stopping the headrest at the lower end of the outer circumferential surface; And a plurality of inclined protrusions formed to be spaced apart at regular intervals to form an inclined groove for adjusting the height of the headrest above the rectangular protrusion. When referred to as 'L'mm, the inner diameter of the part spaced apart by a predetermined angle (θ) on both sides with respect to the maximum radial axis is reduced by' a'mm so that the outer peripheral surface has an eccentric circle shape.

The headrest stay groove forming block may include an outer body having the outer circumferential surface; An inner body having the inner circumferential surface; A bearing is inserted between the outer body and the inner body, and the outer body rotates by the bearing part.

Here, the headrest stay groove forming block is preferably made of SKD (high alloy steel) or HSS (Hi-speed steel).

In addition, the headrest stay groove forming block according to the present invention includes a shaft connecting groove for connecting the shaft to the inner circumferential surface and the outer body forming a plurality of layers spaced apart at predetermined intervals on the outer circumferential surface; A plurality of rectangular rollers which are spaced at equal angles in the circumferential direction and are formed in the grooves formed at the lowermost side of the outer body to form a rectangular groove for stopping the headrest; An inclined roller portion having a plurality of inclined rollers formed in a plurality of layers, the plurality of inclined rollers being spaced at the same angle in the circumferential direction and inserted into the grooves formed on the upper side of the groove formed at the lowermost side of the outer body to form an inclined groove for height adjustment of the headrest. Wow; And a roller stopper pin formed at the center of the rectangular roller and the inclined roller to rotatably fix the rectangular roller and the inclined roller.

Here, when the length from the outer center point to the outermost points of the rectangular roller and the inclined roller is 'A', and the maximum length of 'A' is 'L' [mm], having the 'L' 'A' of the rectangular roller and the inclined roller spaced apart from the rectangular roller and the inclined roller by a predetermined angle 'nθ' satisfies 'L-na' [mm] to connect the outermost points of the rectangular roller and the inclined roller. One outer circle forms an eccentric circle, where n = 0, 1, 2... And L and a are real.

Here, the stay groove forming block for the headrest is preferably made of SKD (high alloy steel) or HSS (Hi-speed steel).

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 1a shows a front view of the headrest stay groove forming apparatus according to the present invention, Figure 1b shows a left side view of the headrest stay groove forming apparatus according to the present invention.

As shown, the stay groove forming apparatus for the headrest according to the present invention comprises a main body 110, the control panel 120, the groove forming apparatus 130 and the operation panel 140.

The main body 110 forms an outer frame of the stay groove forming apparatus for the headrest, and includes a power supply unit and a hydraulic tank 170.

The groove forming apparatus 130 is a member for fixing the headrest stay 180, and is used to move the headrest stay 180 back and forth horizontally when the groove is formed. Hydraulic cylinders are connected to both sides of the groove forming apparatus 130, and a detailed structure thereof will be described with reference to FIGS. 2A to 2C.

A groove forming block 190 is placed on an upper surface of a portion (guide) of the headrest stay 180 fixed to the top of the groove forming apparatus 130, and a main shaft is formed at the center of the groove forming block 190. The main shaft 151 is connected to the driving motor 160 so that the main shaft 151 rotates by the driving motor 160 and interlocks with the main shaft 151 to form the groove forming block 190. Is rotated to form a groove of the fixed headrest stay 180.

Figure 2 shows a front view of the stay groove forming apparatus for fixing the stay for the headrest according to the present invention.

The groove forming apparatus 130 is a device for fixing the headrest stay 180 and moving horizontally, and is used to horizontally move the headrest stay 180 horizontally in a processing process. Horizontal movement is performed by the first and second hydraulic cylinders 201 and 202 mounted on both sides of the headrest stay 180.

A horizontal support 111 is formed in the middle of the main body 110 shown in FIGS. 1A and 1B, and the groove forming apparatus 130 is mounted on the horizontal support 111.

The lower base 210 is fixed to the horizontal support 111 by a bolt. A slide base 220 is mounted on an upper surface of the lower base 210, and a left stopper 231 and a right stopper 232 are fixed to both sides of the slide base 220. The left hydraulic stopper 231 is equipped with a first hydraulic cylinder 201.

A slider 240 is placed on an upper surface of the slide base 220, and the slider 240 is connected to the first hydraulic cylinder 201 and slid horizontally and horizontally by the first hydraulic cylinder 201.

The left-clamp holder 271 is fixed to the upper surface of the slider 240. The left-clamp holder 271 and the right-clamp holder 272 are members for fixing the stay 180 for the headrest. The left-clamp holder 271 and the right-clamp holder 272 are engaged to form a fixing groove 273 in which the headrest stay 180 is fixed at the top thereof.

The second hydraulic cylinder 202 is mounted to the right clamp holder 272, the slide base 260 is connected to the second hydraulic cylinder 202, and the right clamp holder 272 is connected to the slide base 260. The slide base 260 slides along the surface of the slider 240. According to this structure, the right-clamp holder 272 is moved in the direction of the left-clamp holder 271 by the second hydraulic cylinder 202 to tightly fix the headrest stay 180.

The first hydraulic cylinder 201 is a member for moving the headrest stay 180 from side to side in a fixed state, and the second hydraulic cylinder 202 is a member for fixing the headrest stay 180 before processing. It plays a role as.

The fixed headrest stay 180 is in contact with the groove forming block 290, and grooves are formed in various sizes and shapes by the rotation processing of the groove forming block 290.

Although only one groove forming device is described above on the horizontal support 111 of the main body 110, the two or more groove forming devices shown in FIG. 2 are formed on the horizontal support 111. Simultaneously forming grooves for the headrest stays can further increase the efficiency and economic efficiency.

Detailed description of the groove forming block will be described with reference to FIGS. 4 to 6, and a more detailed description of the groove forming process will be described again with reference to FIG. 3.

Here, the illustrated is limited to the case where the groove forming direction is orthogonal to the vertical axis of the headrest stay, but when the groove forming direction forms an angle within 90 degrees with the vertical axis of the headrest stay, It is also possible to perform the operation by positioning the clamp holder 271 and the right-clamp holder 272 and the members to be interlocked by the above angle.

Figure 3 is a clamping portion shown for explaining the process of forming a stay groove for the headrest according to the present invention.

Figures 1 to 5 show the procedure of the groove forming process of the headrest stay.

First, the headrest stay 273 is fixed to the fixed left-clamp holder 271, and the right-clamp holder 272 is moved by the second hydraulic cylinder 202 in the direction of the left-clamp holder 271. To fix it (①).

The groove forming block 290 is rotated once in the direction of ② to primarily process the fixed headrest stay 180 (②).

After the primary processing, the slider 240 is horizontally moved to the right (③ direction) by the first hydraulic cylinder 201, and the headrest stay 180 linked with the slider 240 is also moved together. The moving distance can be changed according to the design, and the moving distance is measured and performed by the sensor 241 (③).

After moving in the direction ③, the groove forming block 290 is rotated once in the direction ④ to perform secondary processing on the fixed headrest stay 180 (④).

After the secondary processing, it is moved by the first hydraulic cylinder 201 in the direction ⑤ so as to be returned to its original position.

The reason for performing machining by alternating horizontal movement (③ and ⑤ directions) and rotation directions (② and ④ directions) is that the load acts on the machining part when machining the headrest stay to be processed in only one direction. The grooves are deeply dug at the beginning of the processing, which requires a lot of load, and the grooves are dug at the end of the processing, where the load is relatively small.

The process sequence is for explaining a preferred embodiment, and may be processed by rotating the groove forming block 290 in a fixed direction in accordance with the left and right positions in which the headrest stay 180 is fixed.

4 to 6 illustrate embodiments of the groove forming block forming the stay groove for the headrest according to the present invention.

The first embodiment shown in FIG. 4 is a cylindrical groove-forming block, which comprises a protrusion having a shape of a groove for processing a headrest stay on its outer circumferential surface, and the second embodiment shown in FIG. The bearing is inserted in the shape, and the third embodiment shown in FIG. 6 has a shape in which the protrusions are individually formed by rollers.

First of the groove forming block Example

Referring to FIG. 4, the groove forming block according to the first exemplary embodiment may include a shaft connecting groove 410, an outer body 420, and a rectangular protrusion formed on an outer circumferential surface of the outer body 420 to be connected to the shaft and rotated therein. 420a) and an inclined protrusion 420b.

One rectangular protrusion 420a is formed at the lowermost side of the groove forming block, and is a protrusion for forming a stop groove of the headrest stay that serves as a simultaneous stop function of the headrest.

A plurality of inclined protrusions 420b are formed in an upward direction in which the rectangular protrusions 420a are formed, and are protrusions for forming the height adjustment grooves of the headrest stays that are responsible for height adjustment of the headrests.

When the maximum radius of the rectangular protrusions 420a and the inclined protrusions 420b is 'L'mm, the radius of the part spaced apart by a predetermined angle (θ) to both sides of the maximum radial axis is' a'mm. It becomes smaller by the outer circumference and takes the form of an eccentric circle.

The reason for having the eccentric circle structure is that the headrest stay generally uses steel pipe as a raw material, and the steel pipe is pushed into the eccentric shape by pressing the steel pipe little by little to increase the accuracy of the stay groove processing. There is.

Here, the groove forming block is preferably made of SKD (high alloy steel) or HSS (Hi-speed steel).

Second of the groove forming block Example

Referring to FIG. 5, the groove forming block according to the second embodiment has a rectangular protrusion formed on an outer circumferential surface of the shaft connecting groove 510, the outer body 520, and the outer body 520 formed to be rotatable by connecting with the shaft therein. 520a and the inclined protrusion 520b, the inner body 540, and a bearing portion 530 formed between the outer body 520 and the inner body 540.

The second embodiment differs in that the bearing portion 530 is inserted between the inner body 540 and the outer body 520 in the structure of the first embodiment.

One rectangular protrusion 520a is formed at the lowermost side of the groove forming block, and is a protrusion for forming a stop groove of the headrest stay that serves as a simultaneous stop function of the headrest.

A plurality of inclined protrusions 520b are formed in the upper direction in which the rectangular protrusions 520a are formed, and are protrusions for forming the height adjustment grooves of the headrest stays that are responsible for the height adjustment function of the headrests.

When the maximum radius of the inner body 540 is 'M' mm, the radius of the part spaced apart by a predetermined angle (θ) on both sides about the maximum radial axis becomes smaller by 'a' mm so that the outer circumferential surface is eccentric. Take form.

Since the outer circumferential surface of the inner body 540 has an eccentric circle shape, the outer circumferential surface of the maximum outer diameter of the rectangular protrusion 520a and the inclined protrusion 520b also has an eccentric circle structure.

Third of the groove forming block Example

Referring to FIG. 6, the groove forming block according to the third embodiment includes a shaft connecting groove 610, an outer body 620, a rectangular roller 630a, and an inclined roller 630b formed to be rotatable in connection with a shaft therein. )

The third embodiment is similar in external structure to the first and second embodiments, but in the first and second embodiments, the protrusions are integrally formed in the outer body, but the third embodiment is formed inside the grooves 620a and 620b formed in the outer body. The rollers 630a and 630b, which are protrusions, are individually inserted.

On the outer circumferential surface of the outer body 620, a rectangular roller insertion groove 620a and an inclined roller insertion groove 620b are formed.

The rectangular roller 630a is inserted into the rectangular roller insertion groove 620a, and the inclined roller 630b is inserted into the inclined roller insertion groove 620b.

A central portion of the rectangular roller 630a and the inclined roller 630b is rotatably fixed by the stopper pin 640.

A plurality of rectangular rollers 630a are positioned at the lowermost side of the groove forming block, and are members for forming the stop grooves of the headrest stays which serve the simultaneous stop function of the headrests.

The inclined roller 630b is a member that forms a plurality of layers in an upward direction in which the rectangular protrusions 630a are formed, and forms a height adjusting groove of the headrest stay that serves to adjust the height of the headrest.

Here, the length from the center point of the outer body 620 to the outermost points of the rectangular roller 630a and the inclined roller 630b is referred to as 'A', and the maximum length of 'A' is referred to as 'L' [mm]. , 'A' of the rectangular roller and the inclined roller spaced apart from the rectangular roller and the inclined roller 630-1 having 'L' by a predetermined angle 'nθ' satisfies 'L-na' [mm]. By this equation, the outer circumference circle connecting the outermost points of the rectangular roller and the inclined roller forms an eccentric circle. N = 0, 1, 2... And L and a are real.

Referring to FIG. 6B, as the rectangular roller 630a and the inclined roller 630b rotate, the surfaces for processing the headrest stay surface to form grooves are 630c and 630d. In the case of the rectangular roller 630a, only the rectangular surface 630c is in contact with the stay surface to form the stay rectangular groove. In the case of the inclined roller 630b, the inclined surface 630d including the straight surface is in contact with the stay surface. Form a sloped groove.

Here, the rectangular roller 630a and the inclined roller 630b are preferably made of SKD (high alloy steel) or HSS (Hi-speed steel).

As described in the first to third embodiments, since the outer circumferential surface of the groove forming block is in the form of an eccentric circle, the stay is pressed sequentially while rotating from the portion having the minimum outer diameter to the portion having the maximum outer diameter during the head groove stay groove processing. It is possible for the stay groove to be formed more precisely.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the above-described technical configuration of the present invention may be embodied by those skilled in the art to which the present invention pertains without changing its technical spirit or essential features of the present invention. It will be appreciated that the present invention may be practiced as. Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

According to the configuration of the present invention described above, it is possible to provide a stay groove forming apparatus and a groove forming block used therein, which can easily form the groove of the headrest stay.

In addition, it becomes possible to provide a stay groove forming apparatus capable of forming the stay grooves for the headrest more precisely, and a groove forming block used therefor.

In addition, it is possible to provide a stay groove forming apparatus and a groove forming block used therein, which can simultaneously form a plurality of grooves for headrest stays to increase productivity and economy.

Claims (10)

A slide base; A slider positioned on an upper surface of the slide base and linearly moving by a first hydraulic cylinder; A left-clamp holder fixed to the slider and interlocked with the slider to clamp one surface of the headrest stay; The linear movement is performed by a second hydraulic cylinder, connected to the left-clamp holder with a central axis of the clamp holder shaft connected to the second hydraulic cylinder, interlocked with the left-clamp holder, and the other surface of the stay for the headrest. Right-clamp holder for clamping the; stay groove forming apparatus for a headrest. The method of claim 1, The stay groove forming device for the headrest, And a stay groove forming block positioned upwardly of the left-clamp holder and the right-clamp holder and rotated by a main shaft formed in a direction perpendicular to the clamp holder shaft. The method of claim 2, Stoppers are formed on both left and right sides of the slider base, Each of the stoppers is a stay groove forming apparatus for a headrest, wherein a sensor is attached to a position corresponding to both left and right sides of the slider so as to accurately measure a moving distance of the slider slid by the first hydraulic cylinder. The method of claim 3, The stay groove forming apparatus for the headrest is located on a horizontal support of the main body having a power supply, a control or operation panel, and a hydraulic tank, Wherein the horizontal support is the headrest stay groove forming apparatus, the headrest stay groove forming apparatus is provided with two or more. A shaft connecting groove for connecting the shaft to the inner circumferential surface; A rectangular projection for forming a rectangular groove for stopping the headrest at the lower end of the outer circumferential surface; And a plurality of inclined protrusions formed to be spaced apart at regular intervals to form an inclined groove for height adjustment of the headrest above the rectangular protrusion. When the maximum radius of the rectangular protrusions and the inclined protrusions is 'L' mm, the inner diameters of the parts spaced apart by a predetermined angle (θ) from both sides about the maximum radial axis become smaller by 'a' mm. A stay groove forming block for a headrest, the outer peripheral surface having an eccentric circle shape. The method of claim 5, The stay groove forming block for the headrest, An outer body having the outer circumferential surface; An inner body having the inner circumferential surface; It includes a bearing portion is inserted between the outer body and the inner body, The stay groove forming block for headrests in which the outer body rotates by the bearing portion. The method of claim 6, The headrest stay groove forming block is a headrest stay groove forming block, which is a material of SKD (high alloy steel) or HSS (Hi-speed steel). A shaft connecting groove for connecting the shaft to the inner circumferential surface and a plurality of grooves formed on the outer circumferential surface at a predetermined interval to form a plurality of layers; A plurality of rectangular rollers which are spaced at equal angles in the circumferential direction and are formed in the grooves formed at the lowermost side of the outer body to form a rectangular groove for stopping the headrest; An inclined roller portion having a plurality of inclined rollers formed in a plurality of layers, the plurality of inclined rollers being spaced at the same angle in the circumferential direction and inserted into the grooves formed on the upper side of the groove formed at the lowermost side of the outer body to form an inclined groove for height adjustment of the headrest. Wow; And a roller stopper pin formed at a central portion of the rectangular roller and the inclined roller to rotatably fix the rectangular roller and the inclined roller. The method of claim 8, When the length from the outer center point to the outermost points of the rectangular roller and the inclined roller is 'A' and the maximum length of 'A' is 'L' [mm], 'A' of the rectangular roller and the inclined roller spaced apart from the rectangular roller and the inclined roller having 'L' by a predetermined angle 'nθ' satisfies the 'L-na' [mm] so that the rectangular roller and the inclined roller Outsourcing members who connect the outermost points of the form an eccentric circle, Where n = 0, 1, 2... And L and a are real numbers. The method of claim 9, The headrest stay groove forming block is a headrest stay groove forming block, which is a material of SKD (high alloy steel) or HSS (Hi-speed steel).

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