JP5356674B2 - Screw feeder - Google Patents

Description

The present invention relates to a simple screw supply device installed in an assembly line, and relates to a screw supply device that allows a large number of screws accommodated in a screw accommodating portion to be taken out after being arranged one by one.

Conventionally, as this type of screw supply device, for example, Japanese Patent No. 2997865 (see Patent Document 1) is known. As shown in FIGS. 22 to 25, the screw supply device 1 includes a screw accommodating portion 2 having a box-shaped space, and the screw accommodating portion 2 is moved to the left and right by a mountain-shaped guide rail 3 that partitions the central portion. It is divided. Push-up members 4a and 4b that are alternately raised on the bottom surface of the screw housing portion 2 are provided, and a large number of small screws 5 placed on the inclined upper surfaces of the push-up members 4a and 4b are carried up above the guide rail 3. Slide down on the guide rail 3. Above the guide rail 3, a brush member 8 that swings in the left-right direction about the support shaft 7 is provided. The guide rail 3 extends to the tip of a drive unit 9 provided adjacent to the screw housing unit 2, and a screw take-out unit 10 is provided in the tip weaving unit.
A part of the small screw 5 dispersed on the guide rail 3 from the left and right push-up members 4 a and 4 b is inserted into the screw groove 8 of the guide rail 3 at the same time as the shaft portion 5 a, and the head 5 b of the screw groove 8. It is supported at the opening edge. On the other hand, the small screw 5 remaining on the guide rail 3 without being inserted into the screw groove 8 of the guide rail 3 is removed from the guide rail 3 by the brush member 6. The machine screw 5 inserted into the screw groove 8 of the guide rail 3 reaches the screw take-out portion 10 while gradually moving on the guide rail 3, and is taken out by the bit operation of the assembly line operator.

However, in the above-described screw supply device 1, the small screws 5 are scattered on the guide rail 3 from the push-up members 4 a and 4 b, and the small screw 5 is inserted into the guide rail 3 while being brushed with the brush member 6. Therefore, as shown in FIG. 23, the head 5 b of the machine screw 5 may be caught in the screw groove 8 of the guide rail 3. In particular, as shown in FIGS. 24A and 24B, a small screw 5 having a diameter of the head portion 5b and a length of the shaft portion 5a that are substantially the same and a thickness of the head portion 5b is large. Once pinched, the brush member 8 cannot be easily removed and remains in the guide rail 3. Therefore, the movement of the machine screw 5 from the rear inserted into the screw groove 8 of the guide rail 3 is obstructed, and the main switch of the screw supply device 1 is turned off each time and the small screw 5 is sandwiched in the screw groove 8. The screw 5 had to be removed, which caused a reduction in the working efficiency of the assembly line.

In view of this, the present inventors have disclosed a screw supply device that is designed to increase the working efficiency of the assembly line by avoiding troubles such that a small screw is caught in the screw groove of the guide rail. (See Patent Document 2).
The screw supply device of the invention of the above-mentioned Patent Document 2 is a device in which screws are once aligned before the heads of the screws are supported on the guide rail, and the aligned screws are supplied to the screw grooves of the guide rail. . Specifically, a screw accommodating portion, a conveying means for conveying the screws accommodated in the screw accommodating portion, an aligning means for aligning the screws conveyed by the conveying means, and a downstream side of the aligning means. And a guide rail for supporting the heads of the aligned screws.
According to the above invention, the screws conveyed from the screw accommodating portion are not directly scattered on the guide rail, but are once aligned by the aligning means and then guided to the guide rail. There is no such a situation that the head of the door is caught in the screw groove of the guide rail. In particular, it is possible to easily adjust the directionality by aligning the screws in a row with the screws turned.
In particular, a rotating drum is used as the screw conveying means, and the through holes are provided in the rotating drum, whereby the screws can be conveyed to the aligning means. By tilting the bottom surface of the screw storage city downward toward the rotating drum, it becomes easier for screws to enter the through hole, and by tilting the inner wall surface of the through hole in the direction opposite to the rotational direction of the rotating drum. The screw is configured to be effectively prevented from dropping from the through-hole during conveyance.
Japanese Patent No. 2997865 International Publication Number WO03 / 106307 JP 2006-193331 A

By the way, according to the above-described invention, as shown in FIG. 25, the small screws 201 conveyed from the screw accommodating portion are not directly scattered on the guide rail 202 but are once aligned by the aligning means 204 and then guided to the guide rail 202. Therefore, the head of the machine screw 201 is not caught in the screw groove 203 of the guide rail 202 as in the prior art, and the directionality can be improved by aligning the machine screws 201 in a row. There is a remarkable effect that it can be easily arranged.
However, since the aligning means 204 is used to align the machine screws 201 once with the concave grooves 205, unlike the guide rail 202, which is easy to adjust the width, there is a problem that screws of different sizes cannot be easily accommodated. It was.

For this reason, it is necessary to prepare a screw supply device of a type corresponding to the size of the screws, and the improvement of the size has been demanded because it is troublesome to cope with the size.
Therefore, the present inventor previously described in Japanese Patent Application No. 2005-333432 (see Japanese Patent Application Laid-Open No. 2006-193331: Patent Document 3) that the alignment means provided in the screw supply device can be replaced according to the size of the screws. When supplying different screws, we proposed a screw supply device that can quickly adapt to different screw sizes simply by replacing the alignment means.
However, when a plurality of alignment means are actually prepared and can be replaced according to the size of the screws, and when different screws are supplied, the alignment means can be replaced to cope with the size change of the screws. The work of replacing the alignment means according to the size of the machine was rather troublesome. For example, there has been a problem in that the alignment means is replaced with a wrong screw size, or the alignment means is damaged during replacement work, and the screws are not easily introduced into the alignment means.

Further, in Patent Document 3, the groove on the upper surface of the alignment guide constituting the alignment means is bent so as to protrude to one side in the middle of the conveyance path, thereby moving on the guide rail on the downstream side of the alignment guide. When the screw is stopped, the screw moving on the alignment guide at the bent portion is easily dropped from the concave groove, and the screw is dropped from the side surface of the alignment guide with a small pressure. However, even in this case, the function of removing unaligned screws is insufficient, and it has been desired to be able to perform the function of reliably removing unaligned screws more efficiently.
Therefore, the problem to be solved by the present invention is that the distance between the guide rails can be easily adjusted according to the size of the screws, and it is possible to quickly cope with different screw sizes and align them. It is an object of the present invention to provide a screw supply device capable of more efficiently performing a function of surely removing any screws that are not present.

In order to achieve the above-described object, a screw supply device according to the present invention includes:
An accommodating portion for accommodating screws;
Conveying means for conveying the screws accommodated in the accommodating portion;
Alignment means for aligning the screws conveyed by the conveying means;
A discharging means that is located downstream of the aligning means and discharges the aligned screws;
In a screw supply device comprising a guide bit arranged at a screw take-out part at the end of the discharge means,
The aligning means for aligning the screws can adjust the width according to the size of the spare guide and the screw guides for aligning the screws along the length direction in the groove-shaped conveyance path formed on the upper surface. A linear guide rail that supports and transports the heads of the screws
The preliminary guide includes a concave groove-shaped conveyance path that gradually changes from an inclination angle of about 45 ° with respect to a horizontal plane in the conveyance direction to reach a substantially vertical concave groove-shaped conveyance path. It is characterized by this.

The screw supply device according to the present invention includes:
An accommodating portion for accommodating screws;
A rotating drum that picks up the screws in the housing and discharges them on the guide rail;
Concave groove-shaped conveyance in which the screws conveyed by the rotating drum gradually change the angle from an inclination angle of about 45 ° with respect to the horizontal plane in the conveyance direction to reach a substantially vertical concave groove-shaped conveyance path. A preliminary guide aligned by the road,
A pair of linear plates are formed on the downstream side of the preliminary guide so as to support and move and discharge the heads of the aligned screws. Between the plates according to the size of the screws, etc. A guide rail with adjustable width,
And a guide bit disposed at a screw take-out portion at the end of the guide rail.

The screw supply device according to the present invention includes:
An arrival sensor that detects the arrival of screws at the end of the guide rail along a linear guide rail that supports and conveys the head of the screws, and a screw at a predetermined interval from the arrival sensor. It is also characterized by a stock sensor that detects the stock situation and stops the conveyance.

According to the present invention, the alignment means provided in the screw supply device can easily adjust the width according to the size of the screws and the like. It is possible to provide a screw supply device that can quickly cope with the size of the machine and does not take time to incorporate the screw supply device into the production line or stop the line incorporating the screw supply device for a long time. became.
In addition, it is possible to reliably align the screws traveling on the guide rail through the spare guide that is aligned along the length direction in the groove-shaped conveyance path formed with the screws on the upper surface, which is very difficult to align. Therefore, it is possible to provide a screw supply device with a small number of screws.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 is a perspective view showing the overall structure of a first embodiment of a screw supply apparatus according to the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a side view showing an example of a preliminary guide, FIG. 4 is a plan view thereof, 5 is a front view thereof, FIG. 6 is a side view of the guide rail, FIG. 7 is a front view thereof, FIG. 8 is a plan view thereof, FIG. 9 is a side view of the brush swing mechanism, and FIG. 11 is a side view of the reflux portion, FIG. 12 is a schematic side view of the guide bit, and FIG. 13 is a cross-sectional view thereof.
14 is a perspective view showing the overall structure of a second embodiment of the screw supply apparatus according to the present invention, FIG. 15 is a plan view thereof, FIG. 16 is a side view showing an example of a preliminary guide, and FIG. 17 is a plan view thereof. 18 is a front view thereof, FIG. 19 is a perspective view thereof, FIG. 20 is a perspective view seen from a low angle, and FIG. 21 is a perspective view showing a groove-shaped conveyance path.

As shown in FIG. 1 and FIG. 2, the screw supply device 10 according to this embodiment has a box shape that is small enough to be put on the palm as a whole, and includes a casing 11 and screws 12 incorporated in the casing 11. A housing part 13 and a discharge part 14 are provided. The accommodating portion 13 and the discharge portion 14 are partitioned by a vertical wall 15 extending in the vertical direction at a substantially central portion of the casing 11, and a disc-shaped rotating drum 16 is disposed along the vertical wall 15. Has been.

A large rectangular cutout portion 27 is formed in a part of the casing 11 adjacent to the housing portion 13. By providing the cutout portion 27, it becomes easy to put a large number of screws 12 into the housing portion 13.
The notch 27 that facilitates the insertion of screws into the housing 13 formed in a part of the casing 11 preferably has a rectangular shape with a width close to the width of the rotating drum 16. The depth of the cutout portion 27 can be appropriately determined in consideration of whether it is easy to insert screws and the like, whether a large number of screws 12 can be accommodated in the accommodating portion 13, and the like.

The rotary drum 16 is for sending out the screw 12 accommodated in the accommodating portion 13 to the discharge portion 14 side, and has a notch recess 17 for scooping the screw 12 at 12 locations on the outer peripheral surface. . As shown in FIG. 1, the shape of these notch recesses 17 is such that the front wall and the rear wall are inclined in parallel to the discharge unit 14 side with respect to the rotation direction of the rotary drum 16, The screw 12 is devised so that it can be easily discharged to the discharge portion 14 side. In addition, the bottom plate 18 of the housing part 13 has a height position of the center part of the notch recessed part 17 of the rotating drum 16 so that the notch recessed part 17 of the rotating drum 16 can be easily screwed at the bottom of the housing part 13. Corresponds to the position.

The rotating drum 16 is driven by a motor 19 disposed adjacent to the accommodating portion 13, and this driving force is transmitted to the rotating drum 16 by a belt 20 and a pulley 21. In addition, the number of the notch recessed parts 17 provided in the outer periphery of the rotating drum 16 is not specifically limited to the thing of illustration. In addition, the width of the recess can be changed as appropriate.

As shown in FIGS. 1 and 2, the discharge portion 14 includes a mechanism for aligning the screws 12 discharged from the notch recesses 17 of the rotating drum 16 in a row and moving the screws 12 to the outside of the casing 11. Yes.
This mechanism aligns the recessed groove-shaped spare guide 22 that receives the screw 12 discharged from the rotating drum 16 and the screw 12 conveyed from the spare guide 22, and the end of the spare guide 22 is used to align the casing 11. A guide rail 25 extending linearly to the outside and a return part 51 for returning the screw 12 spilled from the guide rail 25 and the preliminary guide 22 to the accommodating part 13 are provided.
The screws 12 discharged from the storage portion 13 to the discharge portion 14 are fed into the preliminary guide 22 by the slight vibration generated in the entire apparatus, and are aligned in a line by the preliminary guide 22 and then placed in the guide rail 25. It is sent. The guide rail 25 is composed of a pair of long and thin plates 25a and 25b whose gap is adjusted according to the diameter of the shaft portion of the screw 12 to be discharged, and the shaft portion of the screw 12 is inserted into the gap. The screw 12 fed into the guide rail 25 gradually moves along the guide rail 25 with the head of the screw 12 supported on the upper end of the guide rail 25.

In FIG. 2, 28 is an arrival sensor that is installed at the end of the guide rail 25 along the linear guide rail 25 that supports and conveys the head of the screw 12, and 29 detects the arrival of the screw 12. Is a stock sensor that is arranged at a predetermined interval in the opposite direction from the arrival sensor 28 and detects the stock status of the screw 12 to stop the conveyance.
Therefore, when the screw 12 is taken out from a guide bit 72 (described later) for sequentially taking out the tip of a tool such as a screwdriver, the screw 12 detected and stopped by the arrival sensor 28 can be taken out from the guide bit 72 without difficulty. In addition, a predetermined amount is stocked in advance at the position where the screw 12 is removed, and when the stock exceeds a certain amount, the conveyance of the screw 12 is stopped by the stock sensor 29. There is no occurrence of clogging or a conveyance error in which the screw 12 is not quickly fed to the removal position.

As shown in FIGS. 3 to 5, the preliminary guide 22 has a rear wall 32 formed at the rear end of the preliminary guide main body 31, and a V-shaped guide groove 33 formed at the front end. Reference numeral 34 denotes an inclined portion for discharging screws from the preliminary guide body 31 to both sides of the guide groove 33. The preliminary guide 22 is used with the end of the guide groove 33 connected to one end of the guide rail 25.

As shown in FIGS. 6 to 8, the guide rail 25 is provided with a step 41 at one end, the tip of the guide groove 33 is mounted on the step 41 and connected to the guide rail 25, The screw 12 is conveyed on the guide rail 25.
The guide rail 25 has a tip portion protruding from the casing 11, and an upper end of the guide rail 25 is exposed on substantially the same plane as the upper surface 43 (see FIG. 1) of the casing 11. A screw take-out portion is provided near the tip of 25.

The guide rail 25 is composed of a pair of long and thin plates 25a and 25b whose gap can be adjusted according to the diameter of the shaft portion of the screw 12 to be discharged, and the shaft portion of the screw 12 is inserted into the gap. . The screw 12 fed into the guide rail 25 gradually moves along the guide rail 25 with the head of the screw 12 supported on the upper end of the guide rail 25.
In this embodiment, the interval between the plates 25a and 25b constituting the guide rail 25 can be easily adjusted. That is, two pairs of screw receiving pieces 25c and 25d are formed on the lower portions of the plates 25a and 25b so as to protrude laterally at predetermined intervals, and each pair of screw receiving pieces 25c and 25d has a pair. Screw holes 25e and 25f are provided so as to have a C shape.

Therefore, when the screw 12 is small in size, the screw is fixed inside the screw holes 25e and 25f, and the position where the fixing screw 28 is attached to the outside of the screw holes 25e and 25f is sequentially shifted as the screw 12 becomes large. . At this time, the plates 25a and 25b not only spread along the C-shaped screw holes 25e and 25f but also shift in the moving direction of the screw 12. In this case, the preliminary guide 22 is also shifted in the moving direction of the screw 12. There is a need. 32a is a screw hole provided in the preliminary guide 22, and is formed into an oval having a predetermined length along the traveling direction of the screw 12. Therefore, the preliminary guide is the length by which the plates 25a and 25b are shifted in the traveling direction. The position for screwing 22 may be shifted in the traveling direction and screwed by the screw hole 32a.

Reference numeral 35 denotes a base plate to which the guide rail 25 is attached. The base plate 35 is disposed along the plates 25a and 25b, and both ends in the length direction are bent downward and attached to appropriate positions on the casing 11. Yes. A shelf plate 36 having a predetermined height is attached to the top surface of the base plate 35 on the front end side in the traveling direction. The screw receiving pieces 25c below the plates 25a and 25b are fixed at appropriate positions on the base plate 35, and the screw receiving pieces 25d are fixed on the shelf plate 36 with screws using screw holes 25e and 25f, respectively.
At this time, since the screwing position of the base plate 35 is fixed, the screwing positions of the C-shaped screw holes 25e, 25f provided in the screw receiving pieces 25c, 25d to the screw are set to the C-shaped. The distance between the plates 25a and 25b can be arbitrarily adjusted by changing the distance along the line.

On the base plate 35, as shown in FIG. 11, a reflux portion 51 having a vertical wall 15 that divides the central portion of the accommodating portion 13 and the discharge portion 14 in the casing 11 is attached. The reflux portion 51 is for smoothly returning to the housing portion 13 side when the screw 12 scooped up by the notch recess 17 of the rotary drum 16 from the housing portion 13 falls to the housing portion 13 side.

6 to 10, reference numeral 37 denotes a brush. The screw 12 normally moves the guide rail 25 while the head is supported on the upper end of the guide rail 25 and the shaft portion is inserted into the gap between the plates 25a and 25b. The screw 12 in a floating state is generated. The brush 37 is for sweeping off the screw 12 in the floating state from the guide rail 25.
The brush 37 is attached to a support shaft 52 supported by the return portion 51 along the length direction of the upper portion of the guide rail 25 on the side connected to the tip of the preliminary guide 22 and swings at a predetermined angle. Is held to do. Reference numeral 53 denotes a bracket for holding the support shaft 52.
A pinion 54 is integrally formed at the end of the shaft-attached portion of the brush 37, and the pinion 54 is rotated by a drive plate 55 provided with a rack 56 at a corresponding position. A base end portion of the driven lever 57 is pivotally attached to the other end of the drive plate 55, and an engagement pin 58 for the cam shaft 59 is provided at the distal end of the driven lever 57.
The cam shaft 59 is provided with a groove cam 61 on its side surface. The groove cam 61 has a shape in which two circles 62 and 63 are connected to each other, and a small arc 64 that further bulges outward is formed at the connecting portion. As the cam shaft 59 rotates, the groove cam 61 rotates. At this time, the engagement pin 58 of the driven lever 57 moves in the groove cam 61. Along with the movement of the engagement pin 58, the driven lever 57 is also raised and lowered, and the drive plate 55 is also raised and lowered accordingly. At that time, the rack 56 of the drive plate 55 rotates the pinion 54 at the end of the brush 37 to rotate the brush 37.
In the figure, reference numerals 65 and 66 denote elevating guide grooves for restricting the elevating operation of the drive plate 55, 67 denotes a coil spring having one end attached to the drive plate 55 and the other end attached to an appropriate position of the casing 11, and the drive plate 55 is always returned to the initial position. It is for energizing to do.

As shown in FIGS. 12 and 13, the screw take-out portion is provided with a stopper member 71 for temporarily stopping the screw 12 that moves the guide rail 25, and the screw 12 that is disposed and stopped above the stopper member 71. And a guide bit 72 for taking out at the tip of a tool such as a screwdriver. The stopper member 71 is provided with a spring (not shown), and the screw 12 is stopped at a predetermined position by the urging force of the spring.
The guide bit 72 is formed by welding two rectangular guide plates 73 and 74.
That is, unlike the conventional example in which a single metal plate is bent into a V-shape, the V-shaped groove 75 is formed by the two guide plates 73 and 74. In addition to being able to form the 75 guide surfaces 76a and 76b at an acute angle, an intersection line 77 where the guide surfaces 76a and 76b meet at the bottom of the V-shaped groove 75 appears sharply. More specifically, the two guide plates 73 and 74 have outwardly bent portions 78 and 79, respectively, and an acute-angled V-shape at the position of the bent portions 78 and 79 when welded. A groove 75 is formed. Therefore, the V-shaped groove portion 75 having a desired angle can be obtained by appropriately setting the bending angles of the bending portions 78 and 79 of the guide plates 73 and 74. Further, the intersecting line 77 of the V-shaped groove portion 75 appears as a sharp line because the bent portions 78 and 79 of the guide plates 73 and 74 overlap to form one line. Note that the V-shaped groove 75 is provided continuously from the upper end to the lower end of the guide bit 72 and is inclined forward toward the lower end side.

As shown in FIG. 13, the guide bit 72 has wide-angle guide surfaces 82 a and 82 b formed on the outside of the V-shaped groove portion 75 via second bent portions 80 and 81. The opening angle α1 created by the outer guide surfaces 82a and 82b is larger than the opening angle α2 of the guide surfaces 76a and 76b of the V-shaped groove 75. The second bent portions 80 and 81 are substantially parallel to the bent portions 78 and 79 forming the V-shaped groove portion 75. Further, in this embodiment, the outer guide surfaces 82 a and 82 b are slightly shorter at the lower ends than the guide surfaces 76 a and 76 b of the V-shaped groove 75, and a gap is provided between the outer guide surfaces 82 a and 82 b and the upper surface 43 of the casing 11. is there. Note that a screw head regulating member 85 extending integrally along the upper surface of the guide rail 25 is integrally formed at the rear end of one guide plate 74. The restricting member 85 is disposed in the state of being close to the upper surface of the guide rail 25 and is disposed in the vicinity of the head of the screw 12 moving on the guide rail 25 to prevent the screw 12 from being lifted. Further, by extending the rear end 85a of the restricting member 85 to the reflux portion 51, the screw 12 riding on the guide rail 25 is dropped to the return portion 51 by the rear end portion 85a of the restricting member 85, and the guide The clogging of screws on the tip side of the rail 25 is prevented.

In the above embodiment, the case where the notch recess 17 is formed as the rotating drum 16 has been described. However, it is needless to say that the present invention can also be applied to a case where a through hole is provided instead of the notch recess 17.

14 to 21 show a second embodiment of the screw supply apparatus according to the present invention.
As shown in FIGS. 14 to 21, the preliminary guide 110 in this embodiment has a rear wall 112 formed at the rear end of the preliminary guide main body 111, and a concave groove-shaped guide groove 113 formed at the front end. . Reference numeral 114 denotes an inclined portion that feeds the screw 12 from the preliminary guide body 111 to both sides of the guide groove 113. The preliminary guide 110 is used by connecting the tip of the guide groove 113 to one end of the guide rail 25.

The preliminary guide 110 will be described in more detail. The inclined portion 114 is gently inclined on the discharge portion 14 side so as to face the guide groove 113 through the horizontal portion 114-1, and the opposite side of the guide groove 113 is steeply inclined. It is made to form.
Then, as shown in FIGS. 19 to 21, a concave groove-shaped guide groove 113 is initially formed between the inclined portions 114 with an inclination angle of about 45 ° with respect to the horizontal plane in the transport direction , and the guide groove 113. When the angle is gradually changed to become vertical, the guide rail 25 is connected.
By doing so, the preliminary guide 110 aligns the screw 12 along the length direction of the concave groove-shaped guide groove 113 in the horizontal portion 114-1, and the shaft of the screw 12 is caused by slight vibration generated in the entire apparatus. The portion is inserted into the guide groove 113 and gradually moves while gradually changing the angle with the head of the screw 12 supported on the upper end of the guide groove 113. Then, the screw 12 is thrown from the guide groove 113 to the guide rail 25 when it becomes vertical. The screw 12 that is not stored in the guide groove 113 is discharged from the front end of the inclined portion 114 to the reflux portion 51.
Therefore, the screw 12 can be suspended in the guide groove 113 very smoothly, and the screw 12 can be reliably fed into the guide rail 25 in this state.

The screw supply device according to the present invention can be used not only in electric products, precision instruments, and other assembly lines, but also in various scenes where screws are taken out by a tool such as a screwdriver.

It is a perspective view which shows the whole structure of the 1st Example of the screw supply apparatus which concerns on this invention. FIG. It is a side view which shows an example of a preliminary guide. FIG. It is the front view. It is a side view of a guide rail. It is the front view. FIG. It is a side view of a brush swing mechanism. It is the front view. It is a side view of a reflux part. It is a schematic side view of a guide bit. FIG. It is a perspective view which shows the whole structure of the 2nd Example of the screw supply apparatus which concerns on this invention. FIG. It is a side view which shows an example of a preliminary guide. FIG. It is the front view. FIG. It is the perspective view seen from the low angle. It is a perspective view which shows a concave groove-shaped conveyance path. It is a top view which notches and shows a part of conventional screw supply apparatus. It is sectional explanatory drawing which shows the state which supplies screws to a guide rail in the conventional screw supply apparatus. In the conventional screw supply apparatus, it is a perspective explanatory view which shows the state where the screw was pinched | interposed into the guide rail. It is a side view of the alignment means in the conventional screw supply apparatus.

DESCRIPTION OF SYMBOLS 10 Screw supply apparatus 11 Casing 12 Screw 13 Accommodating part 14 Discharge part 15 Vertical wall 16 Rotary drum 17 Notch recessed part 18 Bottom plate 19 Motor 20 Belt 21 Pulley 22 Preliminary guide 23 Plate part 24 Guide groove part 25 Guide rail 25a, 25b Plate 25c, 25d Screw receiving pieces 25e, 25f Screw hole 27 Notch 31 Preliminary guide main body 32 Rear wall 33 Guide groove 34 Inclined portion 35 Base plate 36 Shelf plate 37 Brush 41 Step 43 Upper surface 51 Return portion 52 Support shaft 53 Bracket 54 Pinion 55 Drive plate 56 Rack 57 Drive lever 58 Engaging pin 59 Cam shaft 61 Groove cam 62, 63 Circle 64 Arc 65, 66 Lifting guide groove 67 Coil spring 71 Stopper member 72 Guide bit 73, 74 Guide plate 75 V-shaped groove 76a, 76b Guide surface 77 Intersection Lines 78, 79 Bends 80, 81 bent portions 82a, 82b guide surface [alpha] 1, [alpha] 2 opening angle 85 regulating member 85a rear 110 preliminary guide 111 pre-guide body 112 rear wall 113 guide groove 114 inclined portion 114-1 horizontal portion

Claims (3)

An accommodating portion for accommodating screws;
Conveying means for conveying the screws accommodated in the accommodating portion;
Alignment means for aligning the screws conveyed by the conveying means;
A discharging means that is located downstream of the aligning means and discharges the aligned screws;
In a screw supply device comprising a guide bit arranged at a screw take-out part at the end of the discharge means,
The aligning means for aligning the screws can adjust the width according to the size of the spare guide and the screw guides for aligning the screws along the length direction in the groove-shaped conveyance path formed on the upper surface. A linear guide rail that supports and transports the heads of the screws
The preliminary guide includes a concave groove-shaped conveyance path that gradually changes from an inclination angle of about 45 ° with respect to a horizontal plane in the conveyance direction to reach a substantially vertical concave groove-shaped conveyance path. A screw feeder characterized by that. An accommodating portion for accommodating screws;
A rotating drum that picks up the screws in the housing and discharges them on the guide rail;
Concave groove-shaped conveyance in which the screws conveyed by the rotating drum gradually change the angle from an inclination angle of about 45 ° with respect to the horizontal plane in the conveyance direction to reach a substantially vertical concave groove-shaped conveyance path. A preliminary guide aligned by the road,
A pair of linear plates are formed on the downstream side of the preliminary guide so as to support and move and discharge the heads of the aligned screws. Between the plates according to the size of the screws, etc. A guide rail with adjustable width,
A screw supply device comprising: a guide bit disposed at a screw take-out portion at the end of the guide rail. An arrival sensor that detects the arrival of screws at the end of the guide rail along a linear guide rail that supports and conveys the head of the screws, and a screw at a predetermined interval from the arrival sensor. The screw supply device according to claim 1, wherein a stock sensor that detects a stock situation and stops conveyance is disposed.

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