JPH0829460B2 - Screw feeder - Google Patents

Description

TECHNICAL FIELD The present invention relates to a screw feeder for feeding screws, rivets, tacks and the like to a predetermined position with a shooter.

[Outline of Invention]

According to the present invention, in a screw feeder having a shooter for supplying screws to a predetermined position, a removing means for removing screws having an abnormal posture in a predetermined region on the upper surface of the shooter is provided, and the predetermined region is removed. By pushing back the passed abnormal posture screws by the pushing back means and bringing them back to the predetermined area, it is possible to surely remove the abnormal posture screws on the upper surface of the shooter although the structure is simple. It is the one.

[Conventional technology]

As a conventional screw supply device for supplying screws such as screws and rivets to a predetermined position by a shooter, there is a device described in Japanese Utility Model Publication No. 52-32538.

The device is configured to supply the screws picked up by the dipper to a predetermined position by the shooter. A guide slit is provided on the upper surface of the shooter, and the screws poured from the dipper are slid down to a predetermined position by inserting the shaft portion into the guide slit.

A cover member is provided above the shooter to prevent the heads of the screws from rising from the upper surface of the shooter and prevent the screws from taking an abnormal posture. A removing member for removing screws in an abnormal posture on the upper surface of the shooter is swingably provided. Then, between the lower end of the removing member and the upper surface of the shooter, there is formed a clearance that is approximately the same as the height of the supplied screws and the head. Therefore, the screws that slide down the shooter in the normal posture with the shaft portion inserted in the guide slit of the shooter pass through the above-mentioned gap without the head of the screw catching on the lower end portion of the removing member, The screws in an abnormal posture that have slipped down in an abnormal posture such as a rollover state have their heads caught on the lower end of the removing member and blocked there. Then, the blocked screws having an abnormal posture are configured to be washed off from the upper surface of the shooter by the subsequent swinging motion of the removing member.

[Problems to be solved by the invention]

However, according to the conventional device described above, when supplying the screws having the spring washers incorporated in the shaft portion, the screws have the lower surface of the spring washer hooked on the upper surface of the shooter on both sides of the guide slit. It is designed to slide down the shooter. Therefore, as compared with the case of supplying normal screws in which the spring washer is not incorporated, the gap between the lower end of the removing member and the upper surface of the shooter and the gap between the cover member and the upper surface of the shooter are additionally provided by the amount of the spring washer. It is necessary to increase the size of each, and it is necessary to set the gap in consideration of the error in the mounting position of the spring washer on the shaft of the screw.

However, if the gap between the lower end of the removing member and the upper surface of the shooter and the gap between the cover member and the upper surface of the shooter are increased as described above, screws in an abnormal posture such as a rollover state may cause the removing member to swing. In some cases, or before and after the swinging motion of the removing member, it may pass under the lower end of the removing member and enter the lower portion of the cover member. In such a case, it is necessary to stop the device once and remove the screws manually, which hinders the smooth supply of screws.

Therefore, it is an object of the present invention to provide a screw feeder that can smoothly feed screws having a special structure such as screws having spring washers attached.

[Means for solving problems]

The present invention includes a shooter for supplying screws to a predetermined position, and a guide slit formed so as to open on an upper surface of the shooter, and a shaft portion of the screw is provided with the guide slit. In a screw type feeder configured to move the screws along the guide slits to be supplied to the predetermined position while being inserted into the A removing unit that operates to remove the screws, and a screw having an abnormal posture that has passed through the predetermined region without being removed by the removing unit and pushes back the screw in a direction opposite to the moving direction of the screw to the predetermined position. An abnormal posture screw which is provided with a push-back means that operates so as to bring it back to the area and is pushed back in the opposite direction by the push-back means and brought back to the predetermined area. Those constructed as may undergo removal action by the removing means.

[Action]

According to the present invention, even if screws having an abnormal posture on the upper surface of the shooter pass through the predetermined region of the upper surface of the shooter without being subjected to the removing action of the removing means, the screws having the abnormal posture are pushed back by the pushing back means. By this, it is pushed back in the opposite direction to the original moving direction and brought back to the predetermined region where the removing action of the removing means can be received.
Then, the screws having the abnormal posture pushed back are reliably removed from the upper surface of the shooter by the removing action of the removing means.

〔Example〕

An embodiment in which the present invention is applied to a screw supply device will be described below with reference to the drawings.

As shown in FIG. 1, a frame 19 having a substantially rectangular parallelepiped shape is erected on the upper portion of the base 1. A dipper 10 for picking up the screw 70 is arranged below the inside of the frame body 19, and the screw 70 to be supplied to the dipper 10 is arranged in the dipper 10.
A guide slit (13) into which the shaft portion of (3) is inserted is formed. The dipper 10 includes an arm 11. The base end of the arm 11 is rotatably supported by a shooter 30 by a shaft 18 as shown in FIG. 2, and therefore the dipper 10 is vertically swingable. Arm 11
An engaging slit 12 for engaging the eccentric pin 2 eccentrically provided on the side surface of the rotating cam 20 is formed along the length direction of the arm 11.

A plurality of inclined plates 3 are arranged in the frame body 19 as shown in FIG.
A stock portion 2 for accommodating the 70 is formed in the frame body 19. A partition plate 4 is provided at a substantially central position of the stock portion 2, and a communication opening 9 is formed below the partition plate 4. A space adjusting plate 7 for adjusting the space between the communication openings 9 in the vertical direction is attached to the partition plate 4. And the screw 70 thrown into the stock section 2 is
It is guided by the inclined plate 3 and is gathered toward the upper surface opening of the guide slit 13 through the communication opening 9.

When the dipper 10 descends, a screw 70 bites between the rear wall of the frame 19 and the rear portion of the dipper 10 on one side surface of the frame 19 to prevent the movement of the dipper from being hindered. A screw bite preventive tool 5 is arranged to face the dipper 10.

A shooter 30 is further arranged on the base 1 in front of the dipper 10. The shooter 30 includes a pair of flat plate-shaped guide plates 29, and a guide slit 31 that can communicate with the guide slit 13 of the dipper 10 is formed between the guide plates 29. And this shooter
One half of the starting end side of 30 is arranged inside the stock part 2, and the other half of the end side is arranged outside the stock part 2. The upper surface of the shooter 30 is inclined downward from the starting end side toward the rear end side, and when the dipper 10 is fully raised, the upper surface of the dipper 10 and the upper surface of the shooter 30 are substantially continuous (shown in the figure). In the case of the embodiment, it is almost a straight line). Therefore, in this state, the upper opening of the guide slit 13 and the upper opening of the guide slit 31 form a substantially straight continuous groove.

A brush 40, which is a removing unit for removing an abnormal posture screw such as a screw in the overturned state on the upper surface of the shooter 30, is disposed above the starting end portion of the upper surface of the shooter 30. The brush 40 is attached to a brush attachment plate 41 having a substantially U shape. The brush mounting plate 41 is pivotally supported on the frame body 19 by a shaft 72 so as to swing, that is, swing, in a direction substantially orthogonal to the upper surface opening of the guide slit 31 of the shooter 30. Further, the brush mounting plate 41 is provided with a mounting hole 42, and the mounting hole 6 and the mounting portion 6 provided on one side wall of the stock portion 2.
A biasing means 43 is stretched around a coil spring and the like.

In the frame body 19, as shown in FIG.
The rotary cam 20 is fixed to the rotary shaft 23 of the drive motor 51. And this rotating cam
The cam surface of 20 is in contact with a follower portion 48 which is protruded downward in the intermediate member of the follower member 46, and one end of the follower member 46 is rotatable with respect to the frame body 19 by a shaft 66. It is pivotally supported. A notch 49 for engagement is formed at the other end of the tracing member 46, and the push-up arm 44 is formed in this notch 49.
The lower end of is engaged. And the operating part of the lifting arm 44
As shown in FIG. 1, 44a is a protruding piece portion 45 of the brush mounting plate 41.
Is in contact with

As described above, the eccentric pin 21 is provided on the side surface of the rotary cam 20, and the eccentric pin 21 is engaged with the engaging slit 12 formed in the arm 11 of the dipper 10. Therefore, every time the rotary cam 20 rotates, the dipper 10 reciprocates once about the shaft 18 as a fulcrum.

As shown in FIG. 3, the shooter 30 includes a pair of holding plates 28 that are relatively thicker than the guide plates 29. These holding plates 28 are arranged adjacent to the front end side of the guide plate 29. It is set up. Since these holding plates 28 share the guide plate 29 and the spacer 27 thereof, the guide slit 31 extends to the front end of the holding plate 28. The holding plate 28 is a screw
It is fixed to the spacer 27 by 85.

As shown in FIGS. 1 and 3, a cover member 37 is provided above the shooter 30 to cover the upper surface of the shooter 30 excluding the starting end portion. The cover member 37 is a screw 70.
The head 74 of the screw 70 is prevented from floating above the upper surface of the shooter 30 and taking an abnormal posture on the shooter 30, and the distance between the cover member 37 and the upper surface of the shooter 30 is equal to the head 74 of the screw 70.
It is almost the same as the height of and is set slightly larger. Screw 70
When the spring washer 75 is attached to the shaft portion of the screw, the distance is set to be slightly larger than the sum of the heights of the head 74 of the screw 70 and the spring washer 75. The cover member 37 is configured to be movable up and down in order to adjust the distance between the cover member 37 and the upper surface of the shooter 30 according to the size of the head 74 of the screw 70 supplied. . That is, as shown in FIG. 3, on the side portion of the cover member 37,
A pair of horizontal plate portions 34 having different steps are formed, and hexagon socket head cap bolts 35 are fitted into holes (not shown) of the horizontal plate portions 34, respectively. Screw 35a at the tip of bolt 35
Is screwed into a screw hole (not shown) provided in the bottom plate 36a of the holder member 36 that is screwed and fixed to the side of the shooter 30, and a step 35b is provided in the middle of the bolt 35. There is. The horizontal plate portion 34 of the cover member 37 and the holder member
A coil spring 47 is arranged between the bottom plate 36a of 36 and the bolt 35, and these springs 47 urge the cover member 37 upward.

Then, when the bolt 35 is tightened, the cover member 37 is stepped 35b.
Since the horizontal plate portion 34 is pushed down by it, it descends against the spring 47, and when the bolt 35 is loosened, the cover member 37 is raised by the urging force of the spring 47. According to this embodiment, the rear end side and the front end side of the cover member 37 can be separately moved up and down by the pair of bolts 35 to adjust the distance between the cover member 37 and the upper surface of the shooter 30 in various states. it can. Therefore, the interval can be adjusted according to various screws having different screw lengths. For example, in the case of a screw that is likely to be vertical due to its own weight and tilts easily with respect to the upper surface of the shooter 30, the rear end side of the cover member 37 To prevent the head of the screw from catching on the rear end portion of the cover member 37 by particularly raising, and in the case of a short screw that tends to fall over (near sideways) near the end of the shooter 30, the cover member 37 It is possible to make adjustments such as lowering the front end side to prevent the screws from falling sideways.

Next, in the frame body 19, a push-back member 80 is arranged.

The push-back member 80 brushes the screw 70 in an abnormal posture that slides down on the upper surface of the shooter 30 without being removed by the brush 40 by, for example, weaving the time gap of each swinging motion of the brush 40. A member for pushing back to a predetermined swing region of 40, and as shown in FIGS. 1 and 4A to 4C, is composed of a mounting member 81, a driving member 82, and a rotating member 83.

The lower portion of the rotating member 83 is formed in a substantially U shape,
By inserting a pair of upper and lower pivot pins 84a, 84b integrally provided therein into a pair of upper and lower insertion holes 86a, 86b provided in the attachment member 81, respectively, the arrows in FIGS. 4A and 4B are shown. It is attached to the attachment member 81 so as to be rotatable in the a and b directions. A curved push-back portion 87 is integrally formed on the upper end of the rotating member 83.

Between the spring mounting hole 67 provided in the lower portion of the rotating member 83 and the mounting hole 68 provided in the spring mounting portion 67 of the mounting member 81,
A return spring 69 is installed to return the rotating member 83 to the non-operating state shown in FIG. 4A. Further, a drive spring 89 for driving the rotating member 83 is installed between the spring attaching portion 88 provided in the substantially middle portion of the rotating member 83 and the spring attaching hole 71 provided in the upper portion of the driving member 82. Has been done. The drive spring 89 is composed of a spring (a spring having a large spring constant) having a stronger spring force than the return spring 69 described above.

The driving member 82 is attached to the mounting member 81 by the pin 76 as shown in FIG.
It is mounted rotatably in the directions of arrows c and d in FIG. 4B.
At the lower part of the driving member 82, a driven part 90 bent in a hook shape is formed.
Are provided integrally. The driven part 90 has a driving pin 15 whose outer circumferences 90a and 90b are horizontally projected from the arm 11.
Is configured to slide and its tip portion 91
As shown in FIGS. 4A to 4C, 5 and 6, is bent obliquely to the side opposite to the arm 11 so that the surface facing the drive pin 15 becomes the inclined surface 92. It is configured.

The pin 76, which serves as the rotation axis of the drive member 82, penetrates through the pair of insertion holes 94a, 94b of the substantially U-shaped bearing portion 93 provided in the mounting member 81, and the tip end portion 76a thereof is outward from the insertion hole 94b. It is protruding. Then, at the tip portion 76a, a retaining ring 73
Is installed.

The insertion hole 94b is a long hole, and the tip portion 76a of the pin 76 is configured to be movable along the hole 94b in the directions of arrows e and f in FIGS. 4A and 4B. The pin 76 is urged in the direction of arrow e by a return spring 95 attached to its shaft.

The mounting member 81 is provided with a screw hole 59 into which a screw (not shown) for screwing the mounting member 81 to one side wall of the frame body 19 is screwed.

As shown in FIG. 1, an optical sensor 78 including a light emitting element and a light receiving element is arranged on the side of the shooter 30.
The optical sensor 78 detects the presence or absence of the screw 70 near the starting end of the upper surface of the shooter 30. And shooter
When the optical sensor 78 detects that the number of the screws 70 on the 30 has decreased, the tipper 10 swings based on the detection result, the screws 70 are supplied to the shooter 30, and the screws 70 accumulate on the shooter 30 to some extent. The swing of the dipper 10 is stopped.

Screw supply unit provided at the end of the upper surface of the shooter 30
A locking member 52 is arranged at 33. This locking member 52
Is fixed to the side of the shooter 30 by screws and is biased by the linear spring 55 in the counterclockwise direction in FIG. At one end of the locking member 52, a V-shaped locking portion 53 extending substantially at right angles to its longitudinal direction is formed. When the locking member 52 is in the backward movement position shown in FIG. 1, the locking portion 53 has a screw head 74 that moves on the upper surface of the shooter 30 along the upper opening of the guide slit 31. The screw supply unit 33 is stopped. Further, a stopper portion 54 is formed on the locking portion adjacent to the locking portion 53. The stopper portion 54 comes into contact with the side wall surface of the shooter 30 to regulate the returning position of the locking member 52.

The locking member 52 is provided with a projecting piece portion 56 for locking one end of the linear spring 55, and the takeout of the screw 70 from the screw supply portion 33 is detected on the side of the projecting piece portion 56. A leaf switch 98 is provided.

A bit guide 62 is provided above the locking portion 53 of the locking member 52. The bit guide 62 has three inclined surfaces 63a, 63 that are inclined upward and upward from the head of the screw at the front end stopped by the locking member 52.
B and 63c are provided, and the lower ends of these inclined surfaces form a U-shaped cut 64 having a width substantially the same as the diameter of the shaft portion of the screw.

Next, the operation of this embodiment when a screw having a spring washer 75 attached to its shaft is used as the screw 70 will be described.

First, when the power switch S ₁ is turned on, the optical sensor 78 operates to detect the presence or absence of the screw 70 on the shooter 30. That is, when there are few screws on the shooter 30 or there are no screws on the shooter 30, the optical sensor 78 detects this and starts the drive motor 51 for driving the dipper 10.

When the drive motor 51 starts, the rotary cam shown in FIG.
Since the 20 rotates, the eccentric pin 21 engaged with the engaging slit 12 provided in the arm 11 of the dipper 10 slides in the engaging slit 12 and swings the dipper 10 up and down.
When the dipper 10 swings, of the screws 70 supplied to the upper surface of the dipper 10, the shaft of which is inserted into the guide slit 13 of the dipper 10 is scooped up by the dipper 10. On the other hand, the follower member 46 is rotated by the rotation of the rotary cam 20.
When the push-up arm 44 is moved up and down via the brush, the actuating portion 44a of the push-up arm 44 acts on the projecting piece 45 of the brush mounting plate 41, so that the brush 40 is opened above the guide slit 31 of the shooter 30. Oscillate in a direction almost orthogonal to
The abnormal posture screw on the shooter 30 is removed.

The screw 70 scooped up by the dipper 10 is
The upper surface of 10 is almost in line with the upper surface of the shooter 30, and the upper surface opening of the guide slit 13 of the dipper 10 and the shooter 30.
When the guide slit 31 communicates with the upper surface opening of the guide slit 31, the shaft portion of the guide slit 31 slides down the shooter 30 by its own weight while reaching the screw supply portion 33. Then, the screw 70 sliding down the shooter 30 is locked by the locking portion 53 of the locking member 52.
Thus, the head 74 is locked and stopped. When the screw 70 is accumulated on the shooter 30 to some extent, the optical sensor 78 detects it and stops the drive motor 51.

Then, when the bit 61 of the magnet driver 60 is lowered along the inclined surfaces 63b, 63a or 63c of the bit guide 62, the tip of the bit 61 automatically abuts on the head 74 of the screw 70 to attract it. Also in this state, the bit
When the 61 is pulled forward along the U-shaped cut 64, the head 74 of the screw 70 pushes the locking member 52, so that the locking member 52 rotates clockwise in the forward direction, and the screw 70 moves the screw supplying portion. Drawn from 33. When the screw 70 is pulled out, the locking member 52 is quickly returned to the position shown in FIG. 1 by the urging force of the linear spring 55 to prevent the unnecessary outflow of subsequent screws. At this time, since the stopper portion 54 provided on the locking member 52 strikes the side portion of the shooter 30 and gives an impact to the shooter 30, the shooter 30
The flow of screws on the upper surface of the is smooth. In particular, since small screws have a light weight, the flow thereof often stops on the shooter 30, and it is beneficial to impact the shooter 30 to smooth the flow. Further, when the locking member 52 returns to the original position, the stopper portion 54 abuts against the side portion of the shooter 30, so that the locking member 52 is prevented from being excessively rotated back, and the locking portion 53 is locked. It can be returned to a predetermined position on the upper surface of 30.

The push-back member 80 described above operates as described below.

First, as shown in FIG. 4A, when the dipper 10 descends from the highest position shown by the alternate long and short dash line in the direction of arrow g as shown by the solid line, the drive pin 15 provided on the arm 11 moves the drive member 82.
The outer periphery 90a of the driven portion 90 of the drive member 82 is pressed and slid on the outer periphery 90a so as to rotate the whole in the direction of arrow c. When the drive member 82 rotates in the direction of arrow c, the drive spring 89 installed between the drive member 82 and the rotary member 83 overcomes the spring force of the return spring 69 to move the rotary member 83 in the direction of arrow c. 4B, the rotating member 83 is rotated in the direction of arrow a as shown in FIG. 4B.

Along with the rotation of the rotation member 83 in the direction of the arrow a, the rotation member
The push-back portion 87 of 83 is projected from the position shown by the solid line in FIG. 5 between the upper surface of the shooter 30 and the cover member 37 as shown by the chain line. Then, as shown in FIGS. 4A and 5, the screw 70 having an abnormal posture that has slid down along the upper surface of the shooter 30 without being removed by the brush 40 is present between the cover member 37 and the upper surface of the shooter 30. When it enters and is caught there, the screw 70 is pushed back to the predetermined swinging region of the brush 40 by the protruding push-back portion 87 as shown by the solid line in FIG. 4B and the dashed line in FIG. Be done. Since the brush 40 has a timing such that the upper surface of the shooter 30 is swept at this time, the screw 70 pushed back is the brush 40.
With this, the shooter 30 is reliably wiped off from the upper surface to the side.

Next, the dipper 10 is further lowered from the position shown in FIG. 4B as shown in FIG. 4C, and the drive pin 15 is moved around the outer periphery of the driven part 90.
Upon reaching 90b, the return spring 69 causes the rotating member 83 to return in the direction of arrow b, so that the push-back section 87 returns from above the shooter 30 to the moving position shown by the solid line in FIG.

Next, when the dipper 10 moves upward from the lowest position shown in FIG. 4C in the direction of arrow h, the tip of the drive pin 15 moves to the 4C position.
As shown by the one-dot chain line in the figure and the two-dot chain line in FIG. 6,
Sliding contact with the inclined surface 92 of the tip portion 91 of the driven portion 90, the inclined surface 92 is relatively gradually pressed. As a result, the drive member 82
The tip portion 76a of the pin 76, which is the pivot fulcrum, descends in the insertion hole 94b in the direction of arrow f, and the drive member 82 is slightly inclined as shown by the chain double-dashed line in FIG. And drive pin 15
When it exits above the drive member 82 as shown in FIG. 4A,
Due to the spring force of the return spring 95, the drive member 82 is moved to the position shown in FIGS.
It returns to the position shown by the solid line in the figure. Therefore, when the dipper 10 is lifted, the drive pin 15 moves the outer periphery 90a, 90b of the driven portion 90.
Since it does not slide up, the push-back operation of the screw 70 by the push-back section 87 as described above is not performed.

According to the embodiment described above, the screw with the spring washer 75 attached
In order to supply 70, the gap between the cover member 37 and the upper surface of the shooter 30 needs to be larger than that in the case of supplying the screw 70 to which the spring washer 75 is not attached. A screw 70 with an abnormal posture that slipped down the upper surface of the shooter 30 through the time gap of each rocking motion of the rocking motion.
However, as shown in FIG. 4A, even when the screw 70 is caught between the cover member 37 and the upper surface of the shooter 30 by the push-back member 80, the screw 70 is pushed back to the predetermined swinging region of the brush 40. Then, the brush 40 surely removes it from the upper surface of the shooter 30.

Further, the push-back member 80 does not operate when the dipper 10 is at the highest position shown by the alternate long and short dash line in FIG. 4A and the screw 70 is pouring into the shooter 30, and the dipper 10 pours the screw 70 into the shooter 30. It has a timing to operate when it finishes and starts to descend as shown by the solid line in FIG. 4A. Therefore, the push-back member 80 does not impede the flow of the screw 70 in the normal posture sliding down the shooter 30, and can effectively push back only the screw 70 in the abnormal posture existing on the upper surface of the shooter 30.

Further, the rotating member 83 is configured to interlock with the drive member 82 by the drive spring 89. Therefore, when the rotating member 83 rotates and the push-back portion 87 is projected between the cover member 37 and the upper surface of the shooter 30, the screws 70 in the normal posture are correctly arranged on the upper surface of the shooter 30, and the push-back portion is pushed back. Part 87
Even when the head cannot contact the head 74 of the screw 70 and cannot rotate in the direction of arrow a in FIG. 4A,
Only 82 can continue its normal operation by the extension of the drive spring 89, and therefore the vertical movement of the dipper 10 is not hindered.

The screw feeder in the above-mentioned embodiment has a screw diameter of 2.6 to
It is a 4.0φ screw, which is especially suitable for supplying screws with spring washers installed in advance, but the screw diameter is 2.6.
Of course, it can also be used as a screw feeder having a diameter of φ or less or 4.0φ or more and an ordinary screw having no spring washer.

Further, in the above-described embodiment, a brush that swings in a direction substantially orthogonal to the guide slit provided in the shooter is used as a removing means for removing screws in an abnormal posture in a predetermined area on the upper surface of the shooter. However, the material, structure, and operating state thereof are particularly limited as long as they can remove from the upper surface of the shooter the screws in the abnormal posture which are pushed back by the push-back means and are brought back to the predetermined area. There is no such thing.

Further, in the above-described embodiment, in order to interlock the push-back member 80 with the dipper 10, the push-back member 80 is operated by the drive pin 15 provided on the arm 11, but it is provided directly on the dipper 10. It may be operated by a drive pin or the like.

〔The invention's effect〕

According to the present invention, even if screws having an abnormal posture on the upper surface of the shooter pass through the predetermined region of the upper surface of the shooter without being subjected to the removing action of the removing means, the screws having the abnormal posture are pushed back by the pushing back means. Thus, it is pushed back in the direction opposite to the original moving direction and brought back to the predetermined area where the removing action of the removing means can be exerted. Then, the screws having the abnormal posture pushed back are reliably removed from the upper surface of the shooter by the removing action of the removing means. Therefore, it is very effective to prevent the screws in the abnormal posture from passing through the predetermined area without being removed from the upper surface of the shooter by the removing means and obstructing the movement of the screws in the normal posture thereafter. Further, it is not necessary to remove the screws having the abnormal posture by the manual work, and therefore the screws can be supplied extremely smoothly and easily.

Further, according to the present invention, even when the screws attached with the spring washers are supplied, the screws in the abnormal posture on the upper surface of the shooter can be surely removed, and the screw clogging or the like does not occur.

Further, according to the present invention, the pushing-back means causes the screws in the abnormal posture that have passed through the predetermined area on the upper surface of the shooter without being subjected to the removing action of the removing means in a direction opposite to the original moving direction. It suffices to simply have the function of pushing back to the predetermined area from the area downstream of the predetermined area to the predetermined area, and it is not necessary to have the function of removing screws in an abnormal posture on the upper surface of the shooter.
Therefore, it is possible to extremely easily obtain the push-back means having a simple structure and a reliable operation.

[Brief description of drawings]

The drawings show an embodiment in which the present invention is applied to a screw supply device. FIG. 1 is a perspective view of the entire device, FIG. 2 is a schematic view showing a drive mechanism of the device, and FIG. 4A to 4C are perspective views sequentially showing the operation of the push-back member, FIG. 5 is a plan view of the same, and FIG. 6 is a side view of the same. In the reference numerals used in the drawings, 2 ... stock part 10 ... dipper 13 ... guide slit 30 ... shooter 31 ... guide slit 33 ... screw supply part (predetermined position) 37 ... cover member 40 ...... Brush (removal means) 70 …… Screw 80 …… Push back member (push back means).

Claims (1)

[Claims] 1. A shooter for supplying screws to a predetermined position, and a guide slit formed so as to open on an upper surface of the shooter, and a shaft portion of the screws is used for the guide. A screw feeding device configured to move the screws along the guide slit to be fed to the predetermined position while being inserted in the slit, wherein an abnormal posture in a predetermined region of the upper surface of the shooter is provided. Removing means that operates to remove the screws, and screws having an abnormal posture that have passed through the predetermined region without being removed by the removing means and push back in a direction opposite to the moving direction of the screws. And a push-back means that operates so as to bring it back to the predetermined area. Feeder bis compound, characterized in that kind is configured to be subjected to the action of removal by said removal means.