KR20160018315A

KR20160018315A - Bolting apparatus

Info

Publication number: KR20160018315A
Application number: KR1020140167391A
Authority: KR
Inventors: 김대일
Original assignee: 김대일
Priority date: 2014-08-08
Filing date: 2014-11-27
Publication date: 2016-02-17

Abstract

The present invention relates to a bolting apparatus comprising: a main body; a bolt supply part; a bolt fastening part; and a bolt transfer part. The bolt supply part is installed on one side of the main body and grasps a bolt introduced from the outside to supply the grasped bolt to a predetermined position. The bolt fastening part is installed on one side of the main body to be moved upward and downward. When the bolt fastening part is moved downward, the bolt fastening part grasps the bolt transferred from the bolt supply part and fastens the bolt to a target object. The bolt transfer part is installed on one side of the main body, has one side where the bolt supplied from the bolt supply part is supported, transfers the bolt to a lower part of the bolt fastening part in such a manner that the one side corresponding to the bolt fastening part transfers the supplied bolt to the lower part of the bolt fastening part, and is rotated toward a lower side corresponding to the bolt fastening part when the bolt fastening part is moved downward. According to the present invention, the movement distance of the bolt fastening part for fastening the bolt is minimized, thereby significantly reducing work time depending on the movement distance of the bolt fastening part and remarkably increasing productivity.

Description

[0001] The present invention relates to a bolting apparatus,

The present invention relates to a bolt fastening device, and more particularly, to a bolt fastening device that minimizes a moving distance of a bolt fastening part for fastening a bolt, thereby greatly shortening a working time according to a moving distance of a bolt fastening part, To a bolt fastening device.

Generally, a bolt is one of the mechanical elements used for assembly of various machine tools due to its robustness and convenience of operation. When the fastening is loosened, it is easily released by external impact or vibration, If the bolt head is worn or deformed excessively, the bolt can not be removed when the bolt is to be unlocked in the future. Also, when the bolt head is excessively tightened, The bolt must be tightened to the appropriate depth with proper tightening torque as it will damage it.

Conventionally, the above bolt fastening operation is manually performed by using a hand tool such as a wrench or a wrench. However, since the worker repeatedly tightens the work while confirming the proper tightening torque, labor and time are wasted, In recent years, an automatic bolt fastening device capable of fastening a bolt to a clamped member uniformly and rapidly with a proper tightening torque has been proposed. Has been developed and widely used in various production lines and the like.

1 is a view schematically showing a conventional automatic bolt fastening apparatus.

As shown in FIG. 1, the conventional automatic bolt fastening apparatus 100 includes a bolt aligning unit, a fastening robot that is moved to a fastening object after gripping and holding a bolt supplied by the bolt supply unit 110, Arm 120 as shown in FIG.

When the bolt is supplied from the outside to the supply path formed at one side of the bolt supply part 110, the conventional automatic bolt fastening device 100 transfers the bolt supplied from the bolt supply part 110 to the supply path in one direction, The arm 120 is attracted to the bolt conveyed by the bolt supply unit 110 and then gripped and moved to the object to be fastened, thereby automatically fastening the bolt to the object to be fastened, which can significantly shorten the working time compared with the conventional bolt fastening operation And the quality of the product can be improved by increasing the tightening precision due to the preset tightening torque regardless of the skill of the worker.

However, in the conventional automatic bolt fastening apparatus 100, as shown in FIG. 1, the fastening robot arm 120 moves to the bolt supply unit 110 to fasten the bolt to the fastening object A, The fastening robot arm is moved back to the fastening object A to fasten the bolt to the fastening object A and moves between a gripping position for gripping the bolt and a fastening position for fastening the bolt to the fastening object A 120, the bolt fastening operation is delayed by the moving time of the bolts, and thus there is a limit to the productivity improvement.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to minimize the moving distance of a bolt fastening part for fastening a bolt and to shorten a working time according to a moving distance of a bolt fastening part And a bolt fastening device capable of greatly improving productivity.

It is another object of the present invention to provide a bolt fastening device capable of minimizing a supply distance of a bolt supplied to a bolt fastening part and reducing the size thereof, Device.

It is another object of the present invention to provide a bolt fastening device capable of preventing a delay in bolt fastening operation of an unassembled bolt by arranging a very small bolt into a bolt fastening part.

According to an aspect of the present invention, there is provided a bolt fastening apparatus for fastening a bolt to an object to be fastened, the bolt fastening apparatus comprising: a body; and a bolt, which is provided at one side of the body, A bolt supply unit for supplying a bolt to a predetermined position when the bolt is moved downward, a bolt feed unit for vertically moving the bolt, And a bolt supplied from the bolt supply part is supported on one side of the main body, and the bolt is transferred to the lower part of the bolt fastening part, and one side corresponding to the bolt fastening part is supplied When the bolt fastening portion is moved downward, the bolt fastening portion and the bolt fastening portion are moved to the lower portion of the bolt fastening portion, Bolts that pass downward pivoting is to provide a bolt fastening device characterized by comprising: a.

The bolt arranging portion includes a housing having a housing space in which a bolt is housed, one side of which is disposed in the accommodating space, and a supply path is formed in a direction from the accommodating space toward the bolt fastening portion on one side of the top surface, A transfer unit installed at one side of the housing for transferring the bolts accommodated in the accommodating space to one side of the upper surface of the aligning unit disposed in the accommodating space, And an inserting portion which is installed to be movable in one direction above the aligning portion among the accommodating spaces of the aligning portion and presses the bolts transferred to the upper surface of the aligning portion in one direction to insert the bolts into the supply passage.

The aligning portion may include a stationary frame disposed at one side thereof in the accommodating space, and a guide portion provided at a side of the stationary frame so as to be rotatable with the stationary frame and extending outward from the accommodating space between an outer circumferential side of the stationary frame and one side of the stationary frame. A rotary alignment part formed of a material having a coefficient of friction higher than that of the fixed frame and configured to transfer the bolts inserted in the supply path in one direction along the supply path when rotated, And a rotational force providing means coupled to the one side and providing rotational force to the rotational aligning portion.

The bolt supply unit may include a support portion provided on one side of the main body so as to be rotatable in a vertical direction and having a support groove on one side of the end portion corresponding to the supply portion to receive the bolt and to receive the bolt, A conveying pin which is provided so as to be movable in the direction of the support groove from the supply passage and that presses the bolt conveyed to the supply passage and pulls the bolt into the support groove and an upper portion of the support portion corresponding to the support groove, And a supply unit that is installed to be movable in the vertical direction and grips the bolt pulled into the support groove and transfers the gripped bolts downward to supply the bolts to the bolt delivery unit.

The bolt transmission unit includes a rotating bar that is rotatably installed on one side of the lower portion of the main body, a pair of bolts that are coupled to both ends of the rotating bar so as to be vertically rotatable, A supporting bar formed with a ball, and an elastic member interposed between the rotating bar and the supporting bar, for providing an elastic force in an upward direction to the supporting bar.

According to the present invention, the moving distance of the bolt fastening part for fastening the bolt is minimized, so that the working time can be greatly shortened according to the moving distance of the bolt fastening part, and productivity can be greatly improved.

In addition, the present invention minimizes the supply distance of the bolts supplied to the bolt fastening part, thereby reducing the size of the bolt and shortening the time required for supplying the bolt, thereby further improving the productivity.

In addition, according to the present invention, even a very small bolt is aligned and supplied to the bolt fastening part, thereby preventing the delay of the bolt fastening operation according to the unaligned bolt.

1 is a view schematically showing a conventional automatic bolt fastening apparatus,
2 is a perspective view illustrating a bolt fastening apparatus according to an embodiment of the present invention,
3 is a sectional view of a bolt fastening apparatus according to an embodiment of the present invention,
FIG. 4 is a perspective view of a bolt arrangement according to an embodiment of the present invention, FIG.
5 is a perspective view of a bolt supply unit according to an embodiment of the present invention,
6 is a perspective view of a bolt delivery portion according to an embodiment of the present invention,
7 is a view showing a state where bolts are supplied to the upper surface of the alignment unit by the transfer unit according to the embodiment of the present invention,
8 is a view showing a state in which a presser plate according to an embodiment of the present invention presses a bolt and inserts the bolt into a supply path,
9 is a view illustrating a state where bolts are supplied along the supply path by the aligning unit according to the embodiment of the present invention,
10A is a view showing a state in which the bolt supply unit grips the bolt according to the embodiment of the present invention,
FIG. 10B is a view illustrating a state in which the bolt is supplied to the bolt delivery unit after the supply unit rotates and then descends according to an embodiment of the present invention; FIG.
11 is a view illustrating a state in which a bolt is disposed at a lower portion of a fastening unit by rotating a rotating bar according to an embodiment of the present invention,
12 is a view showing a state in which a fastening unit according to an embodiment of the present invention is moved downward while holding a bolt.

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

2 is a perspective view illustrating a bolt fastening apparatus according to an embodiment of the present invention. FIG. 3 is a sectional view of a bolt fastening apparatus according to an embodiment of the present invention. FIG. 5 is a perspective view of a bolt supply unit according to an embodiment of the present invention, and FIG. 6 is a perspective view of a bolt transfer unit according to an embodiment of the present invention.

2 to 6, the bolt fastening apparatus 1 according to an embodiment of the present invention includes a main body, a bolt alignment portion 20, a bolt supply portion 30, a bolt transmission portion 40, And a fastening part (50).

The main body 10 is formed in a substantially plate shape, and is arranged in a vertical direction on an upper portion of the work table on which the object to be fastened is placed, and plays a role of supporting each structure described later.

The bolt alignment unit 20 includes a housing 21, an alignment unit 22 having one side disposed on the inner side of the housing 21, a transfer unit 23 provided on one side of the housing 21, And an inserting portion 24 which is installed on one side of the inner side of the aligning portion 22 so as to be movable in one direction. The aligning portion 22 aligns the bolts drawn from the outside and transfers the aligned bolts to the bolt supplying portion 30, To the bolt fastening part 50. The bolt fastening part 50 is provided with a bolt fastening part 50,

The housing 21 is formed in a substantially box shape and has a housing space 21a in which a plurality of bolts are accommodated. The housing 21 holds a plurality of bolts drawn from the outside for a predetermined time, And serves to provide a space having a predetermined shape so that the bolt can be easily transferred to the upper surface of the alignment unit 22 described later.

The inclined portion 21b inclined downward in the direction of the conveyance portion 23 described later is formed on the inner bottom surface of the housing 21 so that the bolt leading into the accommodation space 21a can be easily moved in the direction of the conveyance portion 23 And the like.

A supporting wall 21c extending upward from one side of the bottom surface of the bottom surface corresponding to the rear surface of the conveying unit 23a to be described later is formed. The supporting wall 21c includes a conveying unit 23a, So as to prevent the bolts located on the upper surface of the transfer unit 23a from being detached in the process of moving the transfer unit 23a upward.

The alignment part 22 includes a fixed frame 22a having one side disposed in the accommodation space 21a and a rotation alignment part 22b and a rotation alignment part 22b which are rotatably installed on one side of the fixed frame 22a And a rotating force providing means 22c coupled to one side of the housing 21 for aligning the bolts stored in the housing 21 and transferring the bolts to the bolt supply unit 30. [

The fixed frame 22a is formed in a substantially rectangular plate shape and is disposed on the inner side of the housing 21 on one side thereof and has an exposure hole 22aa having a shape corresponding to the shape of the rotational alignment portion 22b, And a supply path L is formed between the outer circumferential edge of the rotation aligning portion 22b and the inner circumferential edge formed with the exposing hole 22aa so as to have a diameter larger than the diameter of the rotation aligning portion 22b.

The fixed frame 22a is formed of a metal having a low frictional force to support the head of the bolt when the bolt is inserted into the supply path L to prevent the bolt from being separated from the supply path L, And can be easily transported along the supply path L by the rotation aligning portion 22b to be described later.

The rotary alignment part 22b is formed in a substantially circular plate shape and is rotatably installed in the exposure hole 22aa of the fixed frame 22a and is formed to have a smaller diameter than the exposure hole 22aa as described above So that a supply path L formed between the outer periphery and the inner periphery of the fixed frame 22a is formed.

When the bolt is inserted into the supply path L, the rotation aligning part 22b is formed of a material having a high frictional force such as silicon. When the bolt is inserted into the supply path L, So that they can be transferred to the bolt fastening part 50 to be described later.

The upper surface of the fixed frame 22a and the rotation aligning portion 22b are provided at a position higher than the bottom of the housing 21, that is, the bottom of the accommodating space 21a, It is preferable that the bolt is supplied so that the pressing operation of the pressing plate 24a, which will be described later, can be performed easily.

The rotating shaft of the motor 42 is connected to one side of the rotation aligning portion 22b in a state where the motor 42 is installed on one side of the housing 21 And serves to provide rotational force to the rotation aligning portion 22b.

The conveying unit 23 includes a conveying unit 23a provided on the side of the stationary frame and the rotation aligning unit 22b in the accommodating space 21a so as to be movable in the up and down direction and a conveying unit 23b provided on one side of the housing 21, And the upper and lower power supply means 23b connected to the unit 23a and serves to transfer a part of a plurality of bolts introduced into the accommodation space 21a to the upper surface of the alignment unit 22. [

The transfer unit 23a is formed in a substantially rod shape and has an inclined surface 23aa inclined downward from the upper end in the direction of the aligning portion 22 so that when a plurality of bolts are drawn into the accommodating space 21a, Part of the bolts is transferred to the upper surface of the aligning portion 22 along the inclined surface 23aa.

The upper and lower power supply means 23b are provided on one side of the housing 21 as described above and one side is connected to one side of the transfer unit 23a to provide the transfer power to the transfer unit 23a. The upper and lower moving plates 23bb and 23bb are coupled to each other by a cylinder 23ba provided on one side of the housing 21 and a lower end of the transfer unit 23a is coupled to the upper surface of the housing 21 and a cylinder 23ba of the cylinder 23ba is coupled to the other side. ).

When the cylinder rod is moved in the vertical direction by the driving force of the cylinder 23ba, the upper and lower moving plates 23b are moved in the vertical direction together with the cylinder block 23bb, To provide Shanghai power.

The insertion portion 24 includes a pressing plate 24a movably installed in the accommodating space 21a of the housing 21 and a moving force providing means 24b having one side connected to one side of the pressing plate 24a And a plurality of bolts transferred to the upper surface of the aligning portion 22 are pressed in the direction of the supply path L so that some of the plurality of bolts are inserted into the supply path L so that the bolts are accurately aligned in the vertical direction It plays a role.

The pressing plate 24a is formed in a substantially rectangular plate shape and is vertically disposed on one side of the upper portion of the aligning portion 22 and is provided to be movable in the direction of the supply path L, So that a part of the bolts is inserted into the supply path L. As shown in Fig.

The moving force providing means 24b is provided on one side of the housing 21 and has one side connected to one side of the pressing plate 24a to provide a moving force to the pressing plate 24a. It is to be understood that such a moving force providing means 24b is so widely known to those of ordinary skill in the art that a commercially available supply can be purchased and used. .

The bolt supply unit 30 includes an up-down cylinder 31 installed at one side of the main body, a rotation unit 32 coupled to one side of the cylinder rod 31b of the up-down cylinder 31, And a supply unit 33 for supplying the bolts moved along the supply path L to the bolt fastening part 50 described later through the bolt transfer part 40. [

The up-down cylinder 31 can be an air cylinder, and includes a cylinder body 31a vertically installed on one side of the main body, and a cylinder rod 31b provided under the cylinder main body 31a in a stretchable manner And a supply unit 33 to be described later is coupled to one side of the cylinder rod 31b through a rotation unit 32 to provide the supply power to the supply unit 33. [

The rotation unit 32 is coupled to the end of the cylinder rod 31b of the up-down cylinder 31 and a supply unit 33 described later is coupled to one side of the supply unit 33 to provide rotational force to the supply unit 33, And serves to rotate between the gripping position and the feeding position.

Here, the rotating unit 32 may be a general rotating cylinder, which is well known to those of ordinary skill in the art, so long as it can be purchased and used commercially. And a detailed description thereof will be omitted.

The supply unit 33 includes a suction pipe 33a formed in a substantially rod shape and having an upper end coupled to one side of the rotation unit 32 and having a suction hole 33aa formed at a lower end thereof and a suction pipe 33a connected to the suction hole 33aa, And a bake unit (not shown) for providing an attraction force to the bail unit 33a.

The suction pipe 33a preferably has a projection 33ab on one side of the inner surface where the suction hole 33aa is formed so that when the bolt is sucked and introduced into the suction hole 33aa, .

Such a suction pipe 33a rotates by 180 ° from the gripping position for gripping the bolt by the rotation unit 32 and the gripping position described above, and between the supply position located at a position corresponding to the bolt transmission unit 40 And is lowered by the up-down unit 31 in a state of being positioned at the supply position, and supplies the bolts to the bolt delivery portion 40 to be described later.

The bolt transmission unit 40 includes a rotation bar 41a provided at the lower portion of the main body 10 so as to be rotatable in the horizontal direction and a rotation bar 41a provided at one side of the main body 10 and connected to one side of the rotation bar 41a, A pair of support bars 43 rotatably coupled to both ends of the rotation bar 41a so as to be vertically rotatable, a rotation bar 41a, And an elastic member 44 which is interposed between the bolt supply part 30 and the support bar 43 and provides an elastic force upwardly to the support bar 43. The bolts supplied from the bolt supply part 30 are arranged one by one below the fastening unit 51 So that the fastening unit 51 can fasten the bolt to the fastening object only by the vertical movement.

The rotation bar 41a is formed in a substantially bar shape and horizontally arranged at a lower portion of the main body 10. The rotation bar 41a supports the pair of support bars 43, And a pair of support bars 43, which are coupled to both ends of the support bar 43, are rotatably disposed on the lower side of the fastening unit 51.

The motor 42 may be a commercially available step motor 42. The motor 42 is installed at one side of the main body 10 and has a rotation axis connected to the center of the rotation bar 41a to rotate the rotation bar 41a It serves to provide.

One pair of the support bars 43 are rotatably coupled to both ends of the rotation bar 41a in the up and down direction and an insertion groove 43a for inserting the bolts is formed at one end of the support bar 43, When the bolt is inserted into the insertion groove 43a by the bolt supply unit 30, the bolt inserted into the insertion groove 43a while rotating together with the rotation bar 41a rotates by 180 °, When the fastening unit 51 is moved downward, the fastening unit 51 is pivoted downward while being pressed by the lower end of the fastening unit 51 so that the fastening unit 51 can fasten the bolt to the fastening object. (51).

The bolt fastening part 50 is provided at one side of the main body 10 and is fastened to one side of the fastening unit 51. The fastening unit 51 is provided at one side of the main body 10, And a vertical driving unit 52 for providing a moving force to the unit 51 in the up and down direction. The unit 51 receives a bolt delivered from the bolt supply unit 30 and fastens the bolt to the fastening object.

The fastening unit 51 includes an electric driver 51a mounted on one side of the main body 10 so as to be vertically movable and arranged in a vertical direction and an electric motor 51b mounted on the outside of the driver unit of the electric screwdriver 51a to surround the driver unit And a suction tube 51b for moving the bolt inserted in the insertion groove 43a and moving the bolt downward to fasten the sucked bolt to a predetermined position among the fastening objects.

The adsorption tube 51b is formed with an adsorption space 51ba therein and an adsorption port 51bb communicated with the adsorption space 51ba at the lower end thereof. So as to absorb and hold the bolts inserted into the insertion groove 43a.

It is to be understood that the electric driver 51a is well known to those of ordinary skill in the art to purchase and use a commercially available one, so detailed description of the components will be omitted.

The upper and lower drive unit 52 is installed on the upper portion of the main body 10 and has one side connected to one side of the electric driver 51a to provide a vertical movement force to the electric driver 51a, Can be used.

FIG. 7 is a view showing a state where bolts are fed to the upper surface of the aligning unit by the conveying unit according to the embodiment of the present invention, and FIG. 8 is a side view of the press plate according to the embodiment of the present invention, FIG. 9 is a view illustrating a state where a bolt is supplied along a supply path by an aligning unit according to an embodiment of the present invention, and FIG. 10A is a view FIG. 10B is a view showing a state in which the supply unit according to the embodiment of the present invention is rotated and then lowered to supply bolts to the bolt delivery portion, and FIG. 11 is a view showing a state in which a rotating bar according to an embodiment of the present invention rotates and a bolt is disposed at a lower portion of a fastening unit. FIG. 12 is a perspective view of a fastening unit according to an embodiment of the present invention, Moved A view showing the state.

The operation of the bolt fastening apparatus 1 according to an embodiment of the present invention having such a structure will be described in detail with reference to FIGS. 7 to 12.

First, when a plurality of bolts are drawn into the housing space 21a of the housing 21, as shown in FIG. 7, the transfer unit 23a is moved upward, and the bolts seated on the upper surface of the transfer unit 23a are moved upward And the upwardly moved bolt is transferred to the upper surface of the alignment unit 22 while being moved along the inclined surface 23aa of the transfer unit 23a.

8, as the pressing plate 24a is moved in the direction of the aligning portion 22, the bolts moved to the upper surface of the aligning portion 22 are pressed in the direction of the supply path L, A part of the bolts inserted into the supply path L are aligned in the fastening direction to be fastened to the fastening object as the head part is supported on one side of the fastening frame 22a and the rotation aligning part 22b do.

9, the bolts inserted into the supply path L are rotated by the frictional force with the rotation aligning part 22b as the rotation aligning part 22b formed of a material having a high friction coefficient rotates, To the outside of the housing 21.

As shown in FIGS. 10A and 10B, the suction pipe 33a is moved downward by the up-down cylinder 31 to suck and grip the bolts disposed at the lower portion thereof, 32 to move from the grip position to the supply position.

The suction pipe 33a located at the supply position is lowered by the up-down cylinder 31 by the up-down cylinder 31 to insert the bolt into the insertion groove 43a of the rotary bar 41a by lowering the suction pipe 33a.

11, the rotating bar 41a is rotated so that the bolt is disposed at the lower portion of the fastening unit 51 in the insertion groove 43a, and the fastening unit 51 is moved downward The bolts inserted into the insertion groove 43a while being moved are gripped and gripped, and the rotary bar 41a is pushed downward so that the rotary bar 41a is rotated downward.

The fastening unit 51 moved downward is returned to the initial position after inserting the bolt into the fastening position of the fastening object and fastening the bolt to the fastening object through the electric screwdriver 51a.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications and variations without departing from the spirit and scope of the invention. Accordingly, the appended claims are intended to cover such modifications or changes as fall within the scope of the invention.

1: bolt fastening device 10:
20: bolt alignment part 21: housing
21a: accommodation space 21b: inclined portion
21c: supporting wall 22:
22a: Fixed frame 22aa: Exposure ball
22b: rotation aligning portion 22c: rotational force providing means
23: transfer unit 23a: transfer unit
23aa: an inclined surface 23b: a Shanghai power providing means
23ba: cylinder 23bb: up-and-down moving plate
24: insertion portion 24a: pressing plate
24b: moving force providing means 30: bolt supply unit
31: Up-down cylinder 31a:
31b: cylinder rod 32: rotation unit
33: Supply unit 33a: Adsorption pipe
33aa: Adsorption hole 33ab:
Not shown: Bake unit 40: bolt transmission part
41: rotating bar 42: motor
43: support bar 43a: insertion groove
44: elastic member 50: bolt fastening part
51: fastening unit 51a: electric screwdriver
51b: Adsorption tube 51ba: Adsorption space
51bb: suction port 52:

Claims

A bolt fastening device for automatically fastening a bolt to an object to be fastened,
A body;
A bolt supply unit installed at one side of the main body to supply a bolt gripped after gripping the bolt drawn from the outside to a preset position;
A bolt fastening part installed on one side of the main body so as to be movable in a vertical direction and gripping a bolt transmitted from the bolt supply part when the bolt is moved downward and then fastening the bolt to the fastening object; And
Wherein the bolt is provided on one side of the main body and the bolt supplied from the bolt supply part is supported on one side and the bolt is transferred to the lower part of the bolt fastening part, And a bolt transferring unit for rotating the bolt.

The method according to claim 1,
Further comprising: a bolt aligning unit installed in proximity to the main body to receive a plurality of bolts supplied from the outside, and aligning the plurality of bolts drawn in and transferring the aligned bolts in one direction.

3. The method of claim 2,
The bolt-
A housing having a housing space in which a bolt is housed;
An aligning part having one side disposed in the accommodating space and having a supply path formed in a direction from the accommodating space toward the bolt fastening part on an upper surface thereof to transfer the bolt inserted into the supply path toward the bolt fastening part;
A conveying unit installed at one side of the housing for conveying the bolts accommodated in the accommodating space to one side of an upper surface of the aligning unit disposed in the accommodating space; And
And an insertion unit that is installed in the accommodating space of the housing so as to be movable in one direction above the aligning unit and presses the bolt transferred to the upper surface of the aligning unit in one direction to insert the bolt into the supply passage. .

The method of claim 3,
The alignment unit
A stationary frame having one side disposed in the accommodating space;
A supply path extending from the accommodating space to the outside is formed between one side of the outer circumference and one side of the stationary frame, and a material having a higher coefficient of friction than the stationary frame, A rotation aligning unit configured to convey the bolts inserted in the supply path in one direction along the supply path when the rotation aligning unit is rotated; And
And a rotational force providing means coupled to one side of the rotational aligning portion and providing rotational force to the rotational aligning portion.

3. The method of claim 2,
The bolt supply part
A gripping position corresponding to the bolt moved from the bolt alignment unit and a rotation position rotated from the gripping position to a position corresponding to the bolt fastening unit, A supply unit which is moved downward in a state of being positioned at the supply position and supplies the bolts to the bolt fastening part;
A rotating unit, one side of which is connected to one side of the feeding unit to provide rotational force to the feeding unit; And
And an up-down cylinder installed at one side of the main body and connected to one side of the supply unit to supply a top power to the supply unit.

The method according to claim 1,
The bolt-
A rotary bar rotatably installed on a lower side of the main body;
A support bar rotatably coupled to both ends of the rotary bar in a vertical direction and having insertion holes into which bolts supplied from the bolt supply unit are inserted; And
And an elastic member interposed between the rotary bar and the support bar to elastically support the support bar in the upward direction.