JP4050456B2 - Screw alignment device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a screw alignment device that automatically aligns a plurality of screws housed in a case in a fixed posture.
[0002]
[Prior art]
Conventionally, as such a screw aligning device, a pair of parallel guide plates are swung up and down in a hopper portion that accommodates a large number of screws, thereby supporting the screw heads with both guide plates. Is placed in a vertical position by dropping between the guide plates, picking up the screws sequentially in this vertical posture, and passing the screws between parallel alignment plates of the same interval connected to the base end of the guide plate to align them in a row It has been.
However, in such a device, it is easy to make a mistake in picking up the screw by the guide plate, and the number of screw alignment is small for the number of swings, or the guide plate is kept in an entangled state without being in a vertical posture. In this case, the applicant of the present invention disclosed in Japanese Patent Application Laid-Open No. 9-58846, and moved up and down by a cam mechanism on both outer sides of the guide plate. An invention in which a lifter that supplies a sideways posture along the alignment direction is provided, or as an improved invention in Japanese Patent Application Laid-Open No. 11-314739, the restriction block is elastically pressed against the upper surface of the guide plate along the upper surface of the guide plate. By retreating and pushing the screws back to the rear in the alignment direction, the present invention provides an invention in which the screws are entangled and realigned.
[0003]
[Problems to be solved by the invention]
In the above inventions, in addition to the guide plate, a lifter, a cam mechanism for moving the lifter up and down, and an operation mechanism for the restriction block are newly required, resulting in a complicated apparatus and an increase in cost.
[0004]
SUMMARY OF THE INVENTION An object of the present invention is to provide a screw aligning device that can reliably take out and align screws one by one with a simpler configuration.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a rotating body having a magnet and a pair of iron plates at a predetermined interval is covered with a cover in a hopper that can accommodate a large number of screws. A screw aligning device in which a screw guide portion is vertically installed and a magnet and an iron plate are moved along with the rotation of the rotating body so that the screws are attracted and transferred on the surface of the cover. The thickness of the pair of iron plates in the moving direction is alternately changed in thickness for each magnet, while only one screw can pass on the moving trajectory of the magnet on the surface of the cover. A stopper is provided, and a pair of parallel guide plates are connected downstream of the stopper so that only the threaded portion of the screw can be loosely inserted, and the upper ends gradually descend as the distance from the cover increases. The screw head To the upper end of the de-plate by ERROR sequentially it is characterized in that aligning straight screw guide plate on the.
According to the second aspect of the present invention, in addition to the object of the first aspect, in order to securely attract the screw in the hopper portion to the cover surface, the screw guide portion on the side where the magnet rises at the bottom portion of the hopper portion is provided. In this case, a lifting body that moves up and down in conjunction with the rotation of the rotating body is provided.
In addition to the object of claim 1 or 2, the invention described in claim 3 moves the cover surface when the guide plate is connected to the surface of the cover in order to securely transfer the screw to the guide plate. A guide member for guiding the screw to be guided between the guide plates is provided.
According to a fourth aspect of the present invention, in addition to the object of any one of the first to third aspects, in order to more reliably transfer the screw to the guide plate, the screw guide portion is formed on the back surface of the flat cover. In order to rotate the rotating body and the magnet along an elliptical locus, the guide plate is connected to a linear portion of the elliptical locus on the cover surface.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<< Form 1 >>
1 is a perspective view of a screw aligning device, FIG. 2 is a longitudinal cross-sectional explanatory view, FIG. 3 is a plan explanatory view, and the screw aligning device 1 is placed in a square box-shaped main body case 2 having a lid 2a that can be opened and closed. The bottom surface gradually becomes deeper toward the center slightly rearward (left side in FIG. 2), and a hopper portion 3 capable of storing innumerable screws as magnetic bodies is formed. On the bottom plate 2b of the main body case 2, an upper portion A flat screw comprising a pair of side plates 5 and 5 as a semicircular cover, and a guide plate 6 as a cover which is between the side plates 5 and 5 and curves at the top along the edge of the side plates 5 and 5. The guide part 4 is erected in such a manner as to penetrate the hopper part 3. The screw guide 4 includes a drive sprocket 8 that is driven to rotate by a motor 7 provided at the lower portion of the main body case 2 and a driven sprocket 9 that is pivotally supported in the same direction directly above the drive sprocket 8. In addition, a link chain 10 as a rotating body composed of a plurality of links 11, 11... Is stretched between the sprockets 8, 9, and the drive sprocket 8 is driven by the motor 7 in FIG. By rotating clockwise, the driven sprocket 9 rotates together with the link chain 10.
The hopper portion 3 has a deepest portion 12 immediately behind the screw guide portion 4, and an opening 13 having substantially the same width as the guide plate 6 is formed in the deepest portion 12 immediately behind the guide plate 6. . The main body case 2, the hopper 3, and the screw guide 4 are made of a non-magnetized material such as stainless steel.
[0007]
In the link chain 10, rectangular magnets 16 are orthogonal to the outside of the links 11, 11... Spaced at predetermined intervals via attachment pieces 14, 14 extending to the side edges of the link 11 and attachment blocks 15. A rectangular iron plate 17, 17 that is slightly larger than the magnet 16 is screwed around the magnet 11 with the magnet 16 interposed therebetween, and the iron plates 17, 17 are screwed in this screwed state. The outer end surface of the guide plate 6 is close to the back surface of the guide plate 6. However, here, the thickness in the rotational direction of the iron plate 17 for each link 11 is changed so that the thicker ones and the thinner ones are alternated. This is because the iron plates 17 and 17 can surely be attracted even if the length of the screw to be transferred changes.
Therefore, when the link chain 10 rotates between the drive sprocket 8 and the driven sprocket 9, the iron plates 17, 17 sandwiching the magnet 16 always move close to the back surface of the guide plate 6 and move in an oval shape within the screw guide portion 4. It will rotate right on the trajectory.
[0008]
Further, a cam 19 eccentric with the drive shaft 18 is fixed to the outer surface of the drive sprocket 8 in the screw guide portion 4 so as to be integrally rotatable. On the other hand, on the right side of the screw guide 4 on the bottom plate 2 b of the main body case 2, a support base 20 with a support bar 21 suspended is set, and the front end is positioned on the lower surface of the cam 19 at the tip of the support bar 21. The swinging plate 22 is pivotally supported by a pin 23 so as to swing slightly from the front. On the left side of the rear end portion 24 of the swing plate 22, an elevating base 25 as an elevating body is connected by a pin 26 so as to close the bottom of the opening 13 of the hopper portion 2. A tension spring 27 is stretched between the part 24 and the rear end part 24 is tensioned downward. Therefore, the angle of the swing plate 22 changes depending on the rotational position of the cam 19 with which the front end of the swing plate 22 abuts. That is, at the rotational position of the cam 19 where the front end is closest to the axis of the drive shaft 18, the swing plate 22 is in a horizontal position as shown by the solid line in FIG. As shown by the two-dot chain line in the figure, when the distance between the front end of the swing plate 22 and the shaft center of the drive shaft 18 is maximized, the front end is pushed downward, and the rear end 24 and the lifting platform 25 are raised. To do. Therefore, the rotation of the cam 19 accompanying the rotation of the drive sprocket 8 causes the swing plate 22 to swing, and the lifting platform 25 repeats up and down movement within the opening 13.
[0009]
On the other hand, a plate-like stopper 28 is attached to the upper outer side of the screw guide 4 so as to straddle the guide plate 6 in an orthogonal shape. The stopper 28 is formed with a through-hole 29 sized to allow loose insertion of a screw accommodated in the hopper 3 at the lower end edge on the guide plate 6 side, and the guide plate 6 is rotated in the rotational direction of the link chain 10. Only one screw that is transported in the direction along it is allowed to pass. Further, a pair of guide plates 33, 33 are supported on the main body case 2 in front of the screw guide portion 4 so as to protrude forward of the main body case 2. The guide plates 33, 33 close the lower end and open a gap 34 in which only the screw portion of the screw can be loosely inserted above, and the rear end of the guide plate 6 extends along the front shape of the guide plate 6. Connected to the center, the upper end has an inclined shape that gradually decreases from the top of the guide plate 6 toward the front. The front end portion is formed with an alignment portion 35 whose upper end is horizontal and whose end is closed. Reference numerals 36 and 36 denote inclined surface portions that are provided on the left and right sides of the rear ends of the guide plates 33 and 33, respectively, and fall into the left and right sides when connected to the guide plate 6.
[0010]
And on the front outer surface of the main body case 2, photoelectric sensors 37, 37 are arranged on the left and right sides so as to sandwich the guide plates 33, 33. The photoelectric sensors 37, 37 are connected to a sensor amplifier 38 disposed on the lower side of the hopper 3, detect the heads of screws located at the upper ends of the guide plates 33, 33, and move backward from the alignment unit 35. When the stored head reaches the detection position of the photoelectric sensors 37, 37, the drive of the motor 7 is stopped.
[0011]
In the screw aligning device 1 configured as described above, when a countless number of screws are accommodated in the hopper 3 and a power switch (not shown) provided in the main body case 2 is turned on, the motor 7 is driven and the drive sprocket 8 is driven. To rotate the link chain 10 between the driven sprockets 9. Then, as the link chain 10 rotates, the magnets 16 and the iron plates 17 and 17 fixed to the links 11 rotate with an elliptical locus on the back side of the guide plate 6, and thus the magnetic force of the iron plates 17 and 17 obtained by the magnet 16. 4, some of the screws 30, 30... Are attracted to the surface of the guide plate 6 and are transferred upward along the guide plate 6 along with the movement of the iron plates 17, 17. In this case, since the iron plates 17 and 17 are positioned before and after the transfer direction with the magnet 16 in between, one of the iron plates 17 and 17 is an S pole and the other is an N pole as shown in FIGS. 4 (A) and 4 (B). Thus, the screw 30 is always adsorbed in a posture along the rotation direction of the link chain 10.
[0012]
When the position of the stopper 28 is reached, only one screw 30 that just enters the position of the through hole 29 through the center of the guide plate 6 can pass through the stopper 28 as shown in FIG. Therefore, as shown in FIG. 2B, when the two screws 30 are attracted symmetrically, the movement is restricted by the stopper 28, and along with the passage of the iron plates 17 and 17 on the back surface of the guide plate 6. If the three screws 30, 30, 30 are adsorbed so as to sandwich one of the centers as shown in FIG. The left and right screws 30, 30 except for the movement are restricted by the stopper 28, and fall to the hopper portion 3 again as the iron plates 17, 17 pass.
On the other hand, when the drive sprocket 8 rotates, the rocking plate 22 rocks through the cam 19 as described above to move the lifting platform 25 up and down within the opening 13, so that the screws 30, 30 stored in the deepest part 12. .. Are moved up and down by the elevator 25 and are attracted to the positions of the iron plates 17 and 17 on the guide plate 6 with good timing, and the transfer of the screws 30, 30.
[0013]
Subsequently, the screw 30 that has passed through the stopper 28 goes around the circular portion of the guide plate 6, reaches the front guide plates 33, 33, and is transferred onto the guide plates 33, 33 as it is. Here, when the screw 30 reaches the guide plates 33 and 33 from the head 31, the head 31 moves away from the guide plate 6 along the upper ends of the guide plates 33 and 33 as shown in FIG. When the iron plates 17, 17 are separated downward to slide forward, the screw portion 32 that has lost its suction hangs down in the gap 34, and the head 31 is supported by the upper ends of the guide plates 33, 33. , 33 is slid down to the front alignment portion 35 due to the inclination of 33.
On the other hand, when the screw 30 reaches the guide plates 33, 33 from the screw portion 32, the screw portion 32 first enters the gap 34 as shown in FIG. When the iron plates 17 and 17 are moved downward, the head 31 that has lost its suction is in a suspended position supported by the upper ends of the guide plates 33 and 33 as in FIG. Slide down to section 35.
[0014]
Even if the screw 30 does not slide to the alignment portion 35 and temporarily stops at the inclined portion of the guide plates 33, 33, the screw 30 is subsequently pushed forward by the screw 30 transferred between the guide plates 33, 33. The screw 30 is reliably transferred to the alignment portion 35. If the angle of the screw 30 reaching between the guide plates 33 and 33 is not good and the transfer to the gap 34 is not successful, the guide plate 6 along the inclined surface portions 36 and 36 on both sides of the guide plates 33 and 33 as shown in FIG. Are guided to either the left or right side of the hopper, fall downward, are accommodated in the hopper 3 again, and wait for the next suction at the deepest portion 12.
Thus, even if the guide plates 33 and 33 are reached in any direction, they are transferred to the guide plates 33 and 33 in the same posture, and these operations are repeated and transferred by the iron plates 17 and 17 moving along an elliptical locus. 30 are arranged in a row in the alignment portion 35 at the front end of the guide plates 33 and 33 and are gradually stored. When the stored screw 30 reaches the detection position of the photoelectric sensors 37, 37, the motor 7 stops and the transfer of the screw 30 is interrupted. When the screw 30 at the tip of the alignment portion 35 is taken out, the motor 7 is driven again. The transfer is started.
[0015]
As described above, according to the first aspect, the screw stored in the hopper 3 can be obtained simply by rotating the link chain 10 including the magnet 16 and the iron plates 17 and 17 in the screw guide 4 standing in the hopper 3. 30 can be reliably taken out one by one and aligned to the alignment portion 35 in a line. Therefore, a simple structure of rotating the link chain 10 by the motor 7 is sufficient as the drive mechanism, and the structure is simplified and the cost is reduced. Further, since the magnet 16 and the iron plate 17 are rotated in the screw guide portion 4 and the screw 30 is transferred via the guide plate 6, the screw 30 is smoothly attracted and detached, and the drive sprocket 8 and the link are connected. There is no possibility that the screw 30 may be caught in the drive unit such as the chain 10 and hinder the rotation, and the reliability and reliability of screw transfer are increased.
Further, by providing a lift 25 that moves up and down in conjunction with the rotation of the link chain 10 at the deepest part 12 of the hopper 3, the screws 30, 30. The screw 30 can be transferred without interruption.
[0016]
<< Form 2 >>
Next, another embodiment of the present invention will be described. In addition, since the same code | symbol as the form 1 shows the structure part of the same function, the overlapping description is abbreviate | omitted.
7 is a perspective view of the screw aligning device 1a, FIG. 8 is a side explanatory view, FIG. 9 is an overall explanatory view seen obliquely from the upper front, and the screw guide portion 40 has a flat rectangular box shape and serves as a cover. The front plate 41 is erected in the main body case 2 so that the front plate 41 is opposed to the front and the whole is inclined rearward, and the front plate 41 side is connected to the deepest portion 12 by a curved plate body at the lower front portion of the screw guide portion 40. A hopper portion 3 is formed. The drive sprocket 8 and the driven sprocket 9 are stored sideways in an oval storage portion 40 a formed in the screw guide portion 40, and the motor 7 is attached to the rear plate 42 of the screw guide portion 4 in an orthogonal manner. Yes.
Here, the magnet 16 and the iron plates 17 and 17 are fixed to the link 11 on the outside of the link chain 10 so that the front end surfaces thereof are in contact with the back surface of the front plate 41. The point that the magnet 16 is located deeper than the iron plate 17 when viewed from the front plate 41 and the thicknesses of the iron plates 17 and 17 are alternately changed for each link 11 are the same as in the first embodiment. Therefore, when the motor 7 is driven and the drive sprocket 8 rotates to the right when viewed from the front, the link chain 10 also rotates to the right together with the driven sprocket 9, and the magnet 16 and the iron plates 17, 17 are moved clockwise in the screw guide portion 40. It will be rotated in a circular locus.
[0017]
Further, the drive sprocket 8 is formed with a circular cam portion 43 that is eccentric from the axial center at the rear plate 42 of the screw guide portion 40, and the cam portion 43 has a left-right direction above the T-shaped plate 44. The long hole 45 formed in the is fitted. This plate 44 penetrates the lower part of the screw guide part 40 and is bent forward in a U shape, and a lift plate 46 as a lift body is fixed to the tip of the plate 44 so as to close the opening 13 of the hopper 3. Then, when the drive sprocket 8 rotates, the plate 44 repeats up and down movement along with the eccentric movement of the cam portion 43, and as shown in the two-dot chain line in FIG. Further, it is possible to realize the reliable suction of the screws 30, 30.
Further, the stopper 28 is erected on the upper left side of the front plate 41 when viewed from the front and orthogonal to the front plate 41, and a through hole 29 is formed at a position intersecting with the rotation locus of the center of the magnet 16. .
[0018]
The guide plates 47, 47 are closed at the lower end and the front end, and are erected upward with a gap 48 in which only the screw portion 32 of the screw 30 can be loosely inserted. The straight part past the upper semicircular part in the rotation trajectory is connected to the surface of the front plate 41, and as it is tilted while gradually lowering the upper end downward, the front end part becomes an alignment part 49 whose upper end is horizontal. ing.
A pair of labels 50 and 50 (thickness 0.05 mm) as a guide member are slightly above the connecting position of the guide plates 47 and 47 on the surface of the front plate 41 and the gap 48 between the guide plates 47 and 47. The guide grooves 51 are formed on the front plate 41 by being attached at substantially equal intervals. The upper sides of both labels 50 and 50 are oblique so that the guide grooves 51 gradually increase in the upward direction. Therefore, the screw 30 entering from above is easily guided to the lower half of the guide groove 51.
[0019]
In the screw aligning apparatus 1a configured as described above, an infinite number of screws 30, 30,... Are accommodated in the hopper 3 to drive the motor 7, and the link chain 10 is rotated between the drive sprocket 8 and the driven sprocket 9. Then, as the link chain 10 rotates, the magnet 16 and the iron plates 17 and 17 rotate on the back side of the front plate 41, so that some of the screws 30, 30. It is adsorbed and moves upward along the surface of the front plate 41 together with the movement of the iron plates 17 and 17.
When the position of the stopper 28 is reached, only one screw 30 that enters the position of the central through hole 29 can pass through the stopper 28 and the movement of the other screws 30 is restricted by the stopper 28 as in the first mode. If the suction is lost with the movement of the iron plates 17 and 17 on the back side of the front plate 41, the iron plate 17 falls again to the hopper 3.
[0020]
On the other hand, the screw 30 that has passed through the stopper 28 makes a U-turn above the front plate 41 and descends to reach the guide plates 47 and 47. Also here, when the guide plate 47, 47 is reached from the screw portion 32 of the screw 30, the screw portion 32 is directly inserted into the gap 48 between the guide plates 47, 47 as shown in FIG. As a result of being transferred onto the guide plates 47, 47, the suction by the iron plates 17, 17 moving downward is lost, and a hanging posture is reached. The guide plate 47, 47 is slid down to reach the alignment section 49. When the screw 30 reaches the guide plates 47, 47 from the head 31, the head 31 is transferred onto the guide plates 47, 47 as shown in FIG. When it moves forward and the iron plates 17, 17 move downward, the suction of the screw part 32 is lost, and it hangs down and slides down to the alignment part 49.
[0021]
Here, a guide groove 51 that is widened upward by the labels 50, 50 is formed immediately before the guide plates 47, 47. Therefore, even if the entry angle of the screw 30 is bad, the head 31 is formed by the guide groove 51. Alternatively, the screw portion 32 is smoothly guided between the guide plates 47 and 47, and the entry error to the guide plates 47 and 47 is reduced.
These operations are repeated each time the movement is performed by the magnet 16 and the magnet 17, and the transferred screw 30 is sequentially aligned and stored in the alignment portion 49 at the front end of the guide plates 47 and 47, and is detected by the photoelectric sensors 37 and 37. The motor 7 stops and the transfer of the screw 30 is interrupted. When the screw 30 at the tip of the alignment portion 49 is taken out, the motor 7 is driven again and the above operation is repeated.
Here, since the drive sprocket 8 and the driven sprocket 9 are disposed sideways and the guide plates 47 and 47 are connected to the flat front plate 41, the transferred screw 30 is connected to the guide plates 47 and 47. Even if there is no transfer, the guide plate moves downward along the front plate 41 while being adsorbed to the iron plate 17, and rises again along the rotation trajectory of the iron plate 17 to reach the stopper 28. There is no need to provide the inclined surface portion 36 for dropping the screw 30 that has failed to get on the 33, 33 onto the hopper portion 3.
[0022]
As described above, also in the second embodiment, the screws 30 stored in the hopper 3 can be reliably taken out one by one by simply rotating the link chain 10 including the magnet 16 and the iron plates 17 and 17 in the screw guide 40. The alignment part 49 can be aligned in a line. Therefore, a simple configuration of rotating the link chain 10 by the motor 7 is sufficient as the driving mechanism, and the same effect as that of the first mode in which the structure is simplified and the cost is reduced can be obtained. Similarly, since the link chain 10 and the like are installed in the screw guide portion 40, there is no possibility that the screw 30 may be caught in these drive portions and obstruct rotation, and the reliability and reliability of screw transfer can be improved. Becomes higher.
In particular, in this embodiment, since the labels 50 and 50 are adhered when the guide plates 47 and 47 are connected to the front plate 41, the screws 30 can be smoothly guided between the guide plates 47 and 47 and transferred reliably. it can. Similarly, since the screw 30 is transferred on an oblong locus on the surface of the flat front plate 41 and the guide plates 47 and 47 are connected to the front plate 41 at a straight portion of the oval locus, the guide plates 47 and 47 are connected. The entry angle of the screw 30 between them is always appropriate, and here, it is possible to realize more reliable transfer of the screw 30 to the guide plates 47 and 47.
[0023]
In the second embodiment, the screw 30 is moved in an elliptical locus, and the effect of surely transferring the screw is obtained in combination with the connecting position of the guide plate. However, the present invention is not limited to this, and a magnet may be directly fixed to a disk-like rotating body such as a sprocket or a drum so as to rotate on a circular locus.
Further, the guide member is not limited to the one used in the second embodiment, and may be provided on the upstream side of the guide plates 33 and 33 on the curved guide plate 6 as in the first embodiment. Of course, the guide member is not limited to the above-mentioned label, and a thick block or the like may be used.
[0024]
【The invention's effect】
According to the first aspect of the present invention, the screws stored in the hopper can be reliably taken out one by one by simply rotating the rotating body provided with the magnet in the screw guide provided upright in the hopper. Can be aligned in a row. Therefore, the structure is simplified and the cost is reduced. Also, since the rotating body is covered with the cover and the screw is transferred on the surface of the cover, the screw is smoothly adsorbed and removed, and the screw is caught in the rotating body in the screw guide part and hinders the rotation. The reliability and reliability of screw transfer are increased. Furthermore, since the iron plates are arranged before and after the moving direction of each magnet, one iron plate is the S pole and the other is the N pole, so that the screw can always be attracted in a posture along the rotation direction of the rotating body. And since the thickness to a moving direction of a pair of iron plate is made into thin thickness alternation for every magnet, even if the length of the screw to transfer changes, it can be made to adsorb | suck to an iron plate reliably.
According to the second aspect of the present invention, in addition to the effect of the first aspect, when the screw guide portion on the side where the magnet rises at the bottom of the hopper portion is erected, it moves up and down in conjunction with the rotation of the rotating body. By providing the lifting / lowering body, the screw in the hopper can be reliably attracted to the cover surface and the transfer of the screw by the magnet can be performed without interruption.
According to the third aspect of the present invention, in addition to the effect of the first or second aspect, the guide member that guides the screw that moves the cover surface between the guide plates when the guide plate is connected to the surface of the cover is provided. Thus, the screw can be reliably transferred to the guide plate.
According to the invention of claim 4, in addition to the effect of any of claims 1 to 3, the screw guide part is rotated on the back surface of the flat cover with a rotating body and a magnet in an oval locus. By connecting the guide plate to the linear portion of the oval locus on the cover surface, it is possible to more reliably transfer the screw to the guide plate.
[Brief description of the drawings]
FIG. 1 is a perspective view of a screw aligning device of form 1. FIG.
FIG. 2 is a longitudinal cross-sectional explanatory view of a screw alignment device of form 1 (a lid is omitted).
FIG. 3 is an explanatory plan view of the screw aligning device according to mode 1 (the lid is omitted);
FIG. 4A is an explanatory diagram showing transfer of a screw to a guide plate.
(B) It is explanatory drawing which shows transfer to the guide plate of a screw | thread.
FIG. 5A is an explanatory diagram showing a transfer state of a screw on a guide plate.
(B) It is explanatory drawing which shows the transfer state of the screw on a guide plate.
(C) It is explanatory drawing which shows the transfer state of the screw on a guide plate.
FIG. 6 is an explanatory diagram showing a state in which a screw is guided by an inclined surface portion.
FIG. 7 is a perspective view of a screw alignment device of form 2;
FIG. 8 is a longitudinal cross-sectional explanatory view of a screw alignment device of form 2;
FIG. 9 is an explanatory view of the screw aligning device of form 2 as viewed obliquely from the upper front.
FIG. 10A is an explanatory diagram showing transfer of a screw to a guide plate.
(B) It is explanatory drawing which shows transfer to the guide plate of a screw | thread.
[Explanation of symbols]
1, 1a ··· Screw alignment device 2 · · Body case 3 · · Hopper portion 4, 40 · · Screw guide portion 6 · · Guide plate 8 · · Drive sprocket 9 · · · Drive sprocket 10 · · · Link chain, 16 ·· Magnet, 17 · · Iron plate, 28 · · Stopper, 30 · · Screw, 33, 47 · · Guide plate, 34, 48 · · Clearance, 35, 49 · · Alignment portion, 37 · · Photoelectric sensor.

Claims (4)

In the hopper part that can accommodate a large number of screws, a screw guide part that is covered with a rotating body provided with a magnet and a pair of iron plates on the outer periphery at predetermined intervals is provided in a vertical direction, A screw aligning device that is capable of adsorbing and transferring the screws on the surface of the cover by movement of the magnet and the iron plate accompanying rotation ,
The iron plates are respectively arranged before and after the moving direction of each magnet, and the thicknesses of the pair of iron plates in the moving direction are alternately thin for each magnet, while the surface of the cover is on the moving locus of the magnets. In addition, a stopper through which only one screw can pass is provided, and there is an interval in which only the screw portion of the screw can be loosely inserted downstream of the stopper, and the upper end gradually descends as the distance from the cover increases. A screw characterized by connecting a pair of parallel guide plates, transferring the heads of the screws that have passed through the stopper in order to the upper end of the guide plate, and aligning the screws on the guide plate in a straight line. Alignment device.   The screw aligning device according to claim 1, further comprising an elevating body that moves up and down in conjunction with the rotation of the rotating body when the screw guide portion on the side where the magnet ascends is erected at the bottom of the hopper.   The screw aligning device according to claim 1 or 2, further comprising a guide member that guides a screw that moves on the surface of the cover to the space between the guide plates when the guide plate is connected to the surface of the cover.   4. The screw guide portion is configured to rotate a rotating body and a magnet on an oblong locus on the back surface of a flat cover, and a guide plate is connected to a linear portion of the oblong locus on the cover surface. The screw alignment apparatus as described in.

Images