KR20170027984A

KR20170027984A - Auto screw drive

Info

Publication number: KR20170027984A
Application number: KR1020150124663A
Authority: KR
Inventors: 류인환; 김상범
Original assignee: 주식회사 로보스타
Priority date: 2015-09-03
Filing date: 2015-09-03
Publication date: 2017-03-13
Also published as: KR101765263B1

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic screw fastener, A reference shaft coupled to a lower portion of the base frame; A head base connected to the reference shaft; A screw fastening head mounted on the head base for fastening a screw at a screw fastening position by vertically moving the screw; And a tilting driving unit that rotates the head base about the reference axis. According to the present invention, not only the screw can be automatically fastened to a vertically formed screw hole, but also the screw can be automatically fastened to a screw hole formed at an inclination.

Description

[0001] AUTO SCREW DRIVE [0002]

The present invention relates to an automatic screw fastener.

Use screws to fasten the components that make up the product. In the case of a display panel constituting a television or a computer monitor, a plurality of screw holes are provided in the inner frame of the front frame when the front frame and the rear cover are fastened, and a plurality of through holes So that the screws are inserted into the through holes of the rear cover and are fastened to the screw holes of the front cover.

When assembling the front frame and the rear cover in the display panel assembly line, the operator tightened the front frame and the rear cover with screws using an electric screwdriver. However, since the work efficiency is lowered according to the skill of the operator, the automatic screw fastening Is applied.

In general, an automatic screw fastener includes a screw supply unit to which a screw is continuously supplied, a screw fastening unit that fastens the screw supplied from the screw supply unit to the fastening portion of the component, and a screw supply unit and screw fastening unit And a moving unit for moving the moving unit.

The screw fastening unit includes an electric screwdriver that moves up and down by a drive unit, a screw holder into which a bit of the electric screwdriver is inserted and which reciprocates straight up and down together with the electric screwdriver to pick up the screw, .

The screw supply unit includes a screw feeding rail on which the screws are arranged in a line and which are supplied with the screws arranged in a line, a supply unit for supplying the screws to the screw feeding rail, a screwdriver positioned on the side of the screw feeding rail, And a stopper on which the screw supplied from the feeding rail is located.

When the screw is fed to the stopper through the screw-feeding rail, the screwdriver moves the screwdriver downward while the screwdriver and the screwdriver move vertically downward. As the screwdriver moves further downward, the screw is moved to the fastening position And the bit of the electric screwdriver is moved downward along the screw holder to rotate, and the screw is screwed into the screw hole of the component.

An automatic fastener is disclosed in Korean Patent No. 10-0926375 (registered on November 11, 2009) (hereinafter referred to as Prior Art 1). The automatic fastener disclosed in the prior art 1 is fed from the feeding means and is positioned on the pick-up portion while the bit cylinder (screw holder) is vertically moved downward by the feeding means (driving unit) The bit cylinder is moved downward while pushing the pick-up part, and the bit cylinder is positioned at the screw clamping position and the bit located inside the bit cylinder moves downward to rotate the screw to the clamping position.

However, in the automatic fastener disclosed in the prior art 1, since the bit cylinder in which the bit of the electric driver is inserted reciprocates vertically, the screw is fastened to the screw hole of the component, so that when the screw hole is formed vertically, However, when the screw hole is formed to be inclined, the screw can not be fastened to the inclined screw hole.

It is an object of the present invention to provide an automatic screw fastener capable of automatically fastening a screw to a vertically formed screw hole as well as automatically fastening the screw to a screw hole formed to be inclined.

In order to achieve the object of the present invention, A reference shaft coupled to a lower portion of the base frame; A head base connected to the reference shaft; A screw fastening head mounted on the head base for fastening a screw at a screw fastening position by vertically moving the screw; And a tilting driving unit that rotates the head base about the reference axis.

The tilting drive unit includes a first guide unit provided on the base frame and guiding a horizontal linear movement; A horizontal slider connected to the first guide unit; A slider driving unit for moving the horizontal slider in a horizontal direction; And a second guide unit connecting the horizontal slider and the head base and guiding the head base to tilt around the reference axis as the horizontal slider moves.

The slider driving unit preferably includes a rack member mounted on the slider, a pinion gear engaged with the rack member, and a driving motor mounted on the base frame to rotate the pinion gear.

A vertical sliding member movably coupled to the upper and lower guide members in a vertical direction and moving up and down according to horizontal movement of the horizontal slider; And a connection shaft connecting the member and the head base.

The vertical guide member may include a guide groove formed in a vertical direction, and the vertical sliding member may include a guide bar slidably inserted into the guide groove.

The vertical guide member may include a guide bar positioned in a vertical direction, and the vertical sliding member may include a guide groove into which the guide bar is inserted.

The tilting drive unit may include a soccer motion unit for rotating the reference shaft so that the head base rotates, a horizontal vertical guide unit for connecting the base frame and guiding movement of the head base, .

The screw fastening head includes a vertical guide unit mounted on the head base to guide vertical movement, a mounting member coupled to the vertical guide unit and moving up and down, and a mounting member driving unit A screw holder for inserting a bit of the electric screwdriver to vertically move the screw in accordance with the upward and downward movement of the mounting member, It is preferable to include a supply unit.

The screw fastening head vertically moves the screw to fasten the screw to the screw hole of the component in a state where the screw base of the component to be fastened with the screw is vertically positioned, The screw fastening head moves the screw downward in an inclined state in a state where the head base is tilted at a predetermined angle by the tilting drive unit so that the screw is screwed into the inclined screw hole of the component. Therefore, it is possible to efficiently perform the screw fastening operation when the screw is fastened to a product such as a display panel having linear screw holes and inclined screw holes.

1 is a side view of an automatic screw fastener according to an embodiment of the present invention,
FIG. 2 is a front view showing a tilting drive unit constituting an embodiment of an automatic screw fastener according to the present invention. FIG.
3 is a front view showing an automatic screw fastener having a tilting drive unit constituting an embodiment of an automatic screw fastener according to the present invention.

Hereinafter, an embodiment of an automatic screw fastener according to the present invention will be described with reference to the accompanying drawings.

1 is a side view showing an embodiment of an automatic screw fastener according to the present invention.

1, an automatic screw fastener according to the present invention includes a base frame 100, a reference shaft 200, a head base 300, a screw fastening head 400, and a tilting drive unit 500 do.

The base frame 100 includes a base portion 110, a front portion 120 provided on the front surface of the base portion 110 and a motor mounting portion 130 provided on the rear side of the upper surface of the base portion 110. The base portion 110 of the base frame 100 is preferably movably coupled to the horizontal column 10.

The reference axis 200 is coupled to the bottom of the base frame 100. The reference axis 200 is coupled to the lower portion of the front portion 120. The reference shaft 200 is coupled to the front surface of the front portion 120 in a protruding manner.

The head base 300 is connected to the reference shaft 200. The head base 300 is formed to have a length in the vertical direction. A reference shaft 200 is connected to a lower portion of the head base 300. The reference axis 200 is fixed to the base frame 100 and can be rotatably coupled to the head base 300 and the reference axis 200 is rotatably coupled to the base frame 100 and the head base 300 As shown in Fig. The head base 300 is allowed to rotate around the reference axis 200 as the axis.

The screw fastening head 400 is mounted on the head base 300, and the screws are attracted to the screw fastening position while moving up and down.

The screw fastening head 400 includes a vertical guide unit 410 mounted on the head base 300 and guiding vertical movement of the screw fastening head 400, A mounting member driving unit 430 for vertically driving the mounting member 420; an electric driver 440 mounted on the mounting member 420; A screw holder 450 for inserting the screw while the bit 441 is inserted therein and moving up and down according to the upward and downward movement of the mounting member 420 and a burr supply unit 460 for applying a buzz to the screw holder 450 .

The vertical direction guide unit 410 includes a guide bar 411 longitudinally coupled to the front surface of the head base 300 and a sliding block 412 slidably coupled to the guide bar 411. The mounting member 420 includes a mounting portion 421 formed in a substantially diagonal shape and a connecting portion 422 extending from the mounting portion 421 and connected to the mounting member driving unit 430. The mounting portion 421 of the mounting member 420 is engaged with the sliding block 412 of the vertical direction guide unit 410. [ The mounting member driving unit 430 includes a rotating motor 431 coupled to the upper end of the head base 300 and a ball screw assembly 432 connected to the rotating motor 431 and positioned along the longitudinal direction of the head base 300 ). The connecting portion 422 of the mounting member 420 is connected to the ball screw assembly 432 of the mounting member driving unit 430 and the connecting portion 422 of the mounting member 420 is rotated by the rotation of the rotating motor 431, And moves up and down along the screw assembly 432. The electric driver 440 includes a main body 442 and a bit 441 connected to the main body 442 and rotated and linearly reciprocated by the operation of the main body 442. [ The electric driver 440 is mounted on the mounting member 420 and the body 441 and the bit 442 are mounted so as to be positioned in the vertical direction. The screw holder 450 is formed in a pipe shape, and a bit 441 of the electric driver 440 is inserted into the screw holder 450, and one end is connected to the electric driver 440. The buffer supply unit 460 includes a buffing block 461 connected to the screw holder 450 and a buzzing tube 462 connected to the buffing block 461.

The screw fastening head 400 may further include a screw feeding rail 470. The screw feeding rail 470 may be inclined and fixed to the head base 300 and may be inclined and fixed to the base frame 100. The screw feeding rail 470 is provided with guide grooves in the longitudinal direction, and the screws are arranged in a line along the guide grooves. A discharge unit (not shown) is provided on the screw feeding rail 470 to discharge the screws one by one. A stopper 480 on which the screw discharged from the screw feeding rail 470 is positioned is provided on the side of the screw feeding rail 470 and the stopper 480 is provided on the holder guide member 490 connected to the head base 300 Hinged.

The tilting drive unit 500 rotates the head base 300 around the reference axis 200.

In the first embodiment of the tilting drive unit 500, the tilting drive unit 500 includes a first guide unit 510, a horizontal slider 520, a slider drive unit 530 And a second guide unit 540. The first guide unit 510 is mounted on the base frame 100 to guide a horizontal linear movement.

The first guide unit 510 includes a fixing block 511 having a linear groove penetrating in the longitudinal direction and mounted on the upper surface of the base 110 of the base frame 100, And a sliding bar 512 which is formed of a metal plate. The straight grooves of the fixing block 511 are positioned in a direction perpendicular to the longitudinal direction of the head base 300 so as to form a cross shape on the head base 300. The horizontal slider 520 is connected to the first guide unit 510. The horizontal slider 520 includes a horizontal plate portion and a vertical plate portion to form a tongue-like shape. The sliding bar of the first guide unit is coupled to the lower surface of the horizontal plate portion of the horizontal slider 520, and the vertical plate portion is coupled to face the head base 300.

The slider driving unit 530 moves the horizontal slider 520 horizontally. The slider driving unit 530 includes a rack member 531 mounted on the horizontal slider 520, a pinion gear 532 engaged with the rack member 531, And a driving motor 533 mounted on the pinion gear 532 for rotating the pinion gear 532. The rack member 531 has a uniform thickness and length and is provided with gears on one side. The rack member 531 is coupled to the end of the horizontal plate portion of the horizontal slider 520. The driving motor 533 is mounted on the motor mounting portion 130 of the base frame 100 formed in a translator shape so that the motor shaft faces downward. The pinion gear 532 is coupled to the motor shaft of the drive motor 533 and meshes with the rack member 531. The pinion gear 532 rotates forward and backward in accordance with forward and reverse rotation of the driving motor 533 to reciprocate the rack member 531 and causes the horizontal slider 520 to slide along the reciprocating motion of the rack member 531 And reciprocates in the horizontal direction together with the bar 512.

In another embodiment of the slider driving unit 530, the slider driving unit 530 includes a rotating motor (not shown), a ball screw assembly (not shown) for linearly reciprocating the horizontal slider 520 in accordance with rotation of the rotating motor, . &Lt; / RTI >

The second guide unit 540 connects the horizontal slider 520 and the head base 300. When the horizontal base slider 520 moves and the head base 300 moves left and right Reference). The second guide unit 540 may include a vertical guide member 541 fixedly coupled to the horizontal slider 520 and a vertical guide member 542 vertically movable in the vertical guide member 541. [ And a connecting shaft 543 connecting the vertical sliding member 542 and the head base 300 to each other. The vertical sliding member 542 moves up and down in accordance with the horizontal movement of the horizontal slider 520.

The upper and lower guide members 541 have uniform widths and lengths and are provided therein with guide grooves linearly penetrating in the longitudinal direction. The vertical sliding member 542 has a guide bar slidably inserted into the guide groove of the upper and lower guide members 541 on one side thereof, and the guide bar is positioned in the vertical direction in the longitudinal direction. It is preferable that the upper and lower guide members 541 are provided at two spaced apart from each other and two guide bars are provided on one side of the vertical sliding member 542 so as to be respectively inserted into the two guide grooves. Alternatively, the vertical guide member 541 may include a guide bar positioned in the vertical direction, and the vertical sliding member 542 may include a guide groove into which the guide bar is inserted. Two vertical guide members 541 may be provided and two guide grooves into which the two guide bars are inserted may be provided in the vertical sliding member 542. [ The connection shaft 543 is fixed to the vertical sliding member 542 side and can be rotatably coupled to the head base 300 side and the connection shaft 543 is rotatably coupled to the vertical sliding member 542 side. And can be fixed to the head base 300 side.

The operation of the first embodiment of the tilting drive unit 500 is as follows.

When the drive motor 533 of the slider drive unit 530 is operated and the pinion gear 532 is rotated forwardly, the rack member 531 engaged with the pinion gear 532 moves linearly in one direction, and the rack member 531 The horizontal slider 520 moves linearly along one direction along the first guide unit 510 according to the movement. The vertical sliding member 542 of the second guide unit 540 is pushed to one side as the horizontal slider 520 moves linearly so that the vertical sliding member 542 moves downward along the upper and lower guide members 541, The head base 300 is tilted to one side in the vertical state with the reference axis 200 as the center. On the other hand, when the drive motor 533 of the slider drive unit 530 is operated to reverse the rotation of the pinion gear 532, the rack member 531 engaged with the pinion gear 532 linearly moves in the other direction, The horizontal slider 520 moves linearly along the first guide unit 510 in the other direction. The horizontal slider 520 moves linearly and pushes the vertical sliding member 542 of the second guide unit 540 to the other side so that the vertical sliding member 542 moves upward along the upper and lower guide members 541, The head base 300 is moved to a vertical state while being inclined to one side with respect to the reference axis 200. As a result, Thus, the slider driving unit 530 is operated to tilt the head base 300 to the left or right (relative to the front face) with respect to the reference axis 200. [

3, the tilting drive unit 500 of the tilting drive unit 500 includes a tilting drive unit 500 for rotating the reference shaft 200 such that the head base 300 rotates each time, And a horizontal and vertical guide unit 560 for connecting the head base 300 and the base frame 100 and guiding the movement of the head base 300.

The soccer operation unit 550 includes a rotation motor 551 mounted on a motor mounting portion 130 'provided below the base portion 110 of the base frame 100, 200). &Lt; / RTI > The horizontal and vertical guide unit 560 includes a support plate portion 561 provided on the upper surface of the base portion 110 of the base frame 100, a guide bar 562 provided horizontally on the support plate portion 561, A vertical sliding member 564 movably coupled to the upper and lower guide members 563 so as to be movable upward and downward, a vertical sliding member 564 and a head base 300, (Not shown).

The operation of the second embodiment of the tilting drive unit 500 is as follows.

When the rotation motor 551 is operated in the forward rotation, the rotation force of the rotation motor 551 is transmitted to the reference shaft 200 through the reduction unit 552 so that the reference shaft 200 rotates in one direction. As the reference shaft 200 rotates in one direction, the head base 300 coupled to the reference shaft 200 tilts to one side in a vertical state with the reference axis 200 as an axis. At this time, the horizontal and vertical guide unit 560 connected to the head base 300 guides the inclination of the head base 300. When the rotation motor 551 is operated in the reverse rotation, the rotation force of the rotation motor 551 is transmitted to the reference shaft 200 through the reduction unit 552 to cause the reference shaft 200 to rotate in the other direction do. As the reference shaft 200 rotates in the other direction, the head base 300 coupled to the reference shaft 200 moves vertically with the reference axis 200 as an axis. In this manner, the rotary motor 551 is operated to tilt the head base 300 to the left or right (with respect to the front face) with respect to the reference shaft 200 as a reference.

Hereinafter, the operation and effect of the automatic screw fastener according to the present invention will be described.

First, a screw hole into which a screw is fastened is vertically formed, and when the screw is fastened to a vertically formed screw hole, the head base 300 is vertically positioned. Since the head base 300 is positioned vertically, the screw fastening head 400 mounted on the head base 300 is vertically positioned. And feeds the screw to the stopper 480 in the screw feeding rail 470. The operation of the mounting member driving unit 430 causes the mounting member 420 to move downward and the electric driver 440, the buoy block 461 and the screw holder 450 to move downward.

As the screw holder 450 moves vertically downward, the screw holder 450 sucks the screw located on the stopper 480. When the screw holder 450 moves downward while pushing the stopper 480 and is located at the screw hole (fastening position) of the component, the bit 441 of the electric screw driver 440 moves downward along the inside of the screw holder 450 The bit 441 is rotated and moved downward to fasten the screw to the screw hole of the component.

The bit 441 is moved upward by the operation of the electric screwdriver 440 and the electric screwdriver 440, the buckle block 461 and the screw holder 450) moves up.

When the screw holder 450 is moved upward, the stopper 480 is positioned in a horizontal state, and then the screws are supplied from the screw feeding rail 470 to the stopper 480.

The above operation is repeated, and the screw is fastened to the part.

When the screws are screwed into the threaded hole, the tilting drive unit 500 rotates the head base 300 about the reference shaft 200, The base 300 is tilted at a set angle. As the head base 300 is inclined, the screw fastening head 400 attached to the head base 300 is also inclined. And feeds the screw to the stopper 480 in the screw feeding rail 470. Feeding the screw to the stopper 480 in the screw feeding rail 470 may proceed in a state where the head base 300 is inclined and may also proceed before the head base 300 is tilted. The operation of the mounting member drive unit 430 causes the mounting member 420 to move downward in an inclined state and the electric driver 440, the buoy block 461, and the screw holder 450 to be inclined downward . As the screw holder 450 moves downward in an inclined state, the screw holder 450 sucks the screw located on the stopper 480. When the screw holders 450 and 300 move downward while pushing the stopper 480 and are located at the inclined screw holes (fastening positions) of the components, the bit 441 of the electric screwdriver 440 is screwed into the screw holder 450, The bit 441 is rotated and moved downward to be screwed into the inclined screw hole of the component in a tilted state.

The screw 441 is moved upward by the operation of the electric screwdriver 440 and the electric screwdriver 440, the buckle block 460 and the screw holder 450) moves up.

The above operation is repeated, and the screw is fastened to the part.

As described above, according to the present invention, when the threaded hole of the part to be fastened with the screw is formed vertically, the screw fastening head 400 moves the screw vertically while the head base 300 is vertically positioned, When the screw fastening head 400 is tilted at a predetermined angle with the tilting drive unit 500 in a state where the screw hole of the component to be fastened is inclined, So that the screw is fastened to the inclined screw hole of the component. Therefore, it is possible to efficiently perform the screw fastening operation when the screw is fastened to a product such as a display panel having linear screw holes and inclined screw holes.

100; A base frame 200; Reference axis
300; Head base 400; Screw fastening head
500; Tilting drive unit

Claims

A base frame;
A reference shaft coupled to a lower portion of the base frame;
A head base connected to the reference shaft;
A screw fastening head mounted on the head base for fastening a screw at a screw fastening position by vertically moving the screw; And
And a tilting drive unit that rotates the head base about the reference axis.

The apparatus according to claim 1, wherein the tilting drive unit comprises: a first guide unit provided on the base frame for guiding horizontal movement in a horizontal direction; a horizontal slider connected to the first guide unit; And a second guide unit connecting the horizontal slider and the head base to guide the head base to tilt around the reference axis as the horizontal slider moves.

The automatic transmission according to claim 2, wherein the slider drive unit includes a rack member mounted on the horizontal slider, a pinion gear meshed with the rack member, and a drive motor mounted on the base frame to rotate the pinion gear Fastener.

The automatic screw fastener according to claim 2, wherein the slider drive unit includes a rotation motor and a ball screw assembly that receives the rotation force of the rotation motor and reciprocates the horizontal slider linearly.

[3] The apparatus of claim 2, wherein the second guide unit comprises: a vertical guide member fixedly coupled to the horizontal slider; a vertical sliding member movably coupled to the up and down guide members in a vertical direction, And a connecting shaft connecting the vertical sliding member and the head base.

The automatic screw fastener according to claim 5, wherein the upper and lower guide members are provided with guide grooves formed in a vertical direction, and the vertical sliding members include guide bars slidably inserted into the guide grooves.

The tilting drive unit according to claim 1, wherein the tilting drive unit comprises: a soccer operation unit for rotating the reference shaft such that the head base rotates; Automatic screw fastener with unit.

The screw fastening head according to claim 1, wherein the screw fastening head comprises: a vertical direction guide unit mounted on the head base to guide vertical movement; a mounting member coupled to the vertical direction guide unit and moving up and down; A screw holder for inserting a bit of the electric screwdriver and moving the screw vertically as the mounting member moves up and down; and a screw holder for holding the screw holder, An automatic screw fastener including a bucky supply unit for operating the buckle.