JPH08155758A - Screw feeding equipment - Google Patents

Abstract

PURPOSE: To increase the probability of screws being inserted in a rail by providing a scooping plate which is supported at the side of the rail in a vertically movable manner, scoops the screws in a storing part, and scatters the screws on an opening edge. CONSTITUTION: One of scooping plates 31 of a pair of scooping plates 31 is movable in the vertical direction. Screws S in a storing part 11 are scooped by a rail 15 to a higher position, scattered on an opening edge of the rail 15, and moved to the other scooping plate 31 on the opposite side. Then, the other scooping plate 31 is vertically moved. In this case, the scooping plate 31 is vertically moved along a guide plate 35, and can scoop the screws S without fail. Because a scooping plate driving mechanism 40 is formed using an pushing cam, it is capable of the intermittent driving, and facilitates the timing adjustment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention accommodates a large number of screws having heads and shafts, screws such as rivets, tacks, etc., aligns these screws and discharges them one by one. Screw feeding device.

[0002]

2. Description of the Related Art Conventionally, as a screw feeding device of this type, for example, those shown in FIGS. 20 and 21 are known (for example, Japanese Utility Model Publication No. 4-32183). This is a housing portion 2 provided in the machine base 1 and housing a large number of screws S, and a groove 3 into which the shaft portion Sa of the screws S is inserted from above from the inside of the housing portion 2 to the outside.
And an inclined rail 4 for supporting the head Sb of the screw S at the opening edge of the groove 3 and guiding the screw S discharged from the inside of the housing 2 to the outside, and the rail 4 in the housing 2 And a dipper 6 having a groove 5 similar to the rail 4 which is swingably provided on the rear side of the rail 4 and continues to the groove 3 of the rail 4 at its top dead center.

Then, the screws S in the accommodating portion 2 are scooped by swinging the dipper 6 by the swinging mechanism 7, and the shaft portion Sa of the screws S which has entered the groove 5 of the dipper 6 in this scooping step. Guide in the groove 5 and slide in the discharge direction,
When it continues to the groove 3 of the rail 4 inclined at its top dead center,
Hand over to the groove 3 of this rail 4,
The screws S are slid on the top to align the screws S, and the screws S are discharged one by one and fed. In this case, rail 4
Since it is inclined, if it is left as it is, the heads Sb adjacent to each other on the rail 4 will overlap and the movement will be locked by the wedge action. Therefore, in the conventional case, the head Sb is pressed to prevent the overlap. A holding plate 8 is provided for prevention.

A stopper 9 for stopping the movement of the screws S reaching the front end of the rail 4 is provided on the side of the front end of the rail 4, and the screws S stopped by the stopper 9 are provided. The screws S can be taken out by a bit B that is pressed from above and engages with the head Sb.

[0005]

By the way, in such a conventional screw feeder, since the dipper 6 reciprocates in the screws S in the accommodating portion 2, the movement of the screws themselves. However, there is a problem that the groove 5 of the dipper 6 does not have a sufficient opportunity to catch the screws S and the feeding is not smoothly performed. Further, if the precision of the alignment between the groove 5 of the dipper 6 and the groove 3 of the rail 4 is poor, the screws S may not be delivered from the dipper 6,
Also in this respect, there is a problem that the screws S may not be smoothly fed.

Further, conventionally, a holding plate 8 for pressing the head Sb to prevent the overlapping is provided. However, since the holding plate 8 is provided, the number of parts is increased, and the holding plate 8 and the head are provided. Since it is necessary to adjust the gap with Sb one by one, there is a problem that the adjustment work is complicated. Further, as shown in FIG. 21, in the case of a head-shaped object such as a dish screw, the head Sb may overlap even if the pressing plate 8 is provided, so that the apparatus may not be usable. However, there is also a problem of poor versatility.

The present invention has been made in view of the above problems, and increases the chances of supplying screws to the rail, increases the probability that the screws will be inserted into the rail, and ensures that the screws are securely screwed into the rail. An object of the present invention is to provide a screw feeder capable of supplying screws. And, if necessary, the presser plate that holds down the head without abolishing the screw feeding function is abolished, which reduces the number of parts and reduces complicated adjustment work. And

[0008]

The technical means of the present invention for achieving such an object is to accommodate a large number of screws provided on a machine base and having a shaft portion and a head having a diameter larger than that of the shaft portion. And a groove into which the shaft portion of the screw is inserted from above from the inside of the accommodating portion and the accommodating portion, and the head of the screw is supported by the opening edge of the groove from the inside of the accommodating portion. In a screw feeder including a rail that guides screws to be discharged to the outside and a supply unit that supplies screws to the rail in the housing, the supply unit can be moved vertically to the side of the rail. When it is supported and moves upward, it scoops up the screws in the accommodation part and scatters the screws on the opening edge of the rail, a scooping plate support mechanism that supports the scooping plate up and down, and the scooping plate up and down. And a scooping plate driving mechanism for moving the scooping plate. In this case, it is effective to provide a pair of the above-mentioned scooping plates and to provide each scooping plate on each of the left and right sides of the rail.

If necessary, a rail support mechanism for supporting the rail in a substantially horizontal and longitudinal direction so as to be movable back and forth,
An inertial force applying mechanism for moving the rail back and forth so as to apply an inertial force in the discharging direction to the screws inserted in the groove of the rail.

Further, it is effective that the rail supporting mechanism is provided with an attaching / detaching mechanism for attaching / detaching the rail so that the rail can be exchanged with another rail having a different groove width. It is effective that the rail support mechanism is constituted by a pair of links provided at both ends in the longitudinal direction of the rail, one end of which is pivotally supported on the machine base side and the other end of which is pivotally supported by the rail. Further, it is effective that the attachment / detachment mechanism of the rail support mechanism is configured by a shaft pin detachably provided at the other end of the link and an insertion hole provided in the rail and through which the shaft pin is inserted.

Further, if necessary, the above-mentioned scooping plate supporting mechanism is provided with a supporting shaft provided on the machine base in parallel with the rail.
And a support arm which is provided on the squid plate and supports the squid plate so as to be swingable about the support shaft. If necessary, a guide plate is provided between the scooping plate and the rail, the guide plate along which the facing edge facing the rail of the scooping plate extends when the scooping plate swings.
In this case, the guide plate has an arc surface centered on the support shaft, and can be moved and positioned along the arc centered on the support shaft so that the upper end edge of the guide plate can be continuous with the opening edge of the rail. The provision is effective.

If necessary, the scooping plate drive mechanism is provided with a drive motor provided on the machine base and a driving shaft provided on the machine base in parallel with the rails and rotated by the drive motor. A driven shaft provided on the machine base in parallel with the driving shaft, a push-up cam rotatably provided on the driven shaft and pushing up a support arm of the squeeze plate, and transmitting rotation of the driving shaft to the push-up cam. And a push-up cam rotating mechanism for rotating the push-up cam. In this case, it is effective that the push-up cam rotation mechanism is configured to include a driving gear that is provided on the driving shaft and a driven gear that is provided on the driven shaft and that meshes with the driving gear so as to move together with the lifting cam. is there. In addition, a positioning mechanism is provided for making the driven shaft or the push-up cam positionally movable, and positioning the driven shaft or the push-up cam at a desired position, and adjusting the push-up amount for pushing up the support arm of the squeeze plate of the push-up cam. It is effective to make it possible to adjust the position of the top dead center of the facing edge facing the rail of the above-mentioned scooping plate.

Also, if necessary, the inertial force imparting mechanism is provided with a driving gear provided on the driving shaft, a driven gear provided on the driven shaft and meshing with the driving gear, and a driven shaft so as to move together with the driven gear. Disk cam having a cam surface with a step formed in the axial direction of the driven shaft on the side opposite to the discharge side of the screws, a cam follower provided on the rail and in contact with the disk cam, and the cam follower having the cam surface of the disk cam. A spring for urging the rail is provided on the discharge side of the screws so that the screw is pressed by the spring.

Further, if necessary, a brush, which is swingable above the rail and whose amount of protrusion is variable, is provided to dispel screws or the like scattered on the rail, and a brush drive mechanism for swinging the brush. It has a structure. Furthermore, if necessary,
A shutter provided on the wall of the accommodating unit for opening and closing a passage for screws to be discharged by moving on the rail, and the squeeze plate so that the shutter is closed when the screws of the squeeze plate are scooped and the shutter is opened when the screws are not scooped A shutter drive mechanism that operates in synchronization with the drive mechanism to open and close the shutter is provided.

If necessary, a stopper for stopping the movement of the screws is provided at the end of the rail on the discharge side, and the screws stopped by the stopper are pressed from above to engage the head. With this configuration, the screws can be taken out. In this case, the stopper is provided on the side wall of the rail, which is formed by bending the leaf spring at the front end of the leaf spring, the leaf spring being provided along the side surface of the rail and having the rear end fixed to the rail. It is effective to have a projecting portion that is inserted into the groove of the rail from the opening provided and presses the shaft portion of the screws in the groove of the rail.

Further, when the rail is pushed when the screws are taken out by the bit, the rail moves backward against the urging force of the spring of the inertial force imparting mechanism. It is effective that the cam follower of the inertial force imparting mechanism is set to be separated from the cam surface of the disc cam. Furthermore, a screw type presence / absence detection unit that detects whether or not there is a screw type stopped by the stopper,
And a motor control unit for stopping the drive motor when a predetermined time has elapsed after the presence / absence of the screws is detected and for starting the drive motor when the absence of the screws is detected. Is effective.

If necessary, the operation timing of the push-up cam rotating mechanism for rotating the push-up cam of the scooping plate drive mechanism is set so that the operation of the scooping plate is stopped for a certain period during which the inertial force applying mechanism is operated. It is configured. Furthermore, the operation timing of the brush drive mechanism is set so that the operation of the brush is stopped for a certain period during which the inertial force applying mechanism is operated, if necessary.

[0018]

According to the screw feeder of the above construction, when the scooping plate driving mechanism is actuated in the supplying part, the scooping plate scoops up the screws inside the accommodating part when the scooping plate moves upward, and scatters them on the opening edge of the rail. To do. In the process of spraying these screws,
In the case where the screws are oriented downward and are caught in the groove of the rail, the shaft of the screw is inserted into the groove, and the head of the screw is supported by the opening edge of the groove. In this case, the screws are sprayed directly on the rails, so the postures of the screws are easily reversed, so that the chance of being caught in the groove of the rail during this inversion increases and the chance of encountering the groove of the rail also increases. , The probability that the screws will be inserted into the rail is increased, and the screws are reliably supplied to the rail. Then, the screws inserted in the groove of the rail are moved on the rail, discharged, and fed one by one.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A screw feeder according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings. The screw feeding device shown in FIGS. 1 to 13 accommodates a large number of screws S having a shaft portion Sa and a head portion Sb having a diameter larger than that of the shaft portion Sa, screws, screws, rivets, tacks and the like. It is a device for aligning and feeding one by one. The illustrated screws S are screws with spring washers, and the head S
The concept of b includes this spring washer.

In this screw feeder, 10 is a plate-shaped machine base, and 11 is a housing portion for housing a large number of screws S. The accommodating portion 11 faces the front and rear, and the machine base 1 via the leg members.
It has standing walls 12 and 12 standing upright at 0, and side walls 13 and 13 fixed to the standing wall 12 on both sides. The standing wall 12, the side wall 13, the later-described squeeze plate 31, and the later-described guide plate 35 constitute a screws accommodating space 14 for accommodating the screws S.

Numeral 15 is a rectangular plate-shaped rail projecting from the inside of the housing portion 11 to the outside. As shown in FIGS. 8 and 10, the rail 15 has a groove 16 into which the shaft portion Sa of the screw S is inserted from the upper side, and an opening edge 16a of the groove 16 supports the head Sb of the screw S. Then, the screws S discharged from the inside of the housing portion 11 to the outside and fed are guided. 1
A rail 15 is provided on the front standing wall 12 of the accommodating portion 11.
It is a passage port for the screws S that are moved up and discharged.

Reference numeral 20 denotes a rail support mechanism that supports the rail 15 so as to be substantially horizontally and longitudinally movable back and forth. The rail support mechanism 20 is provided at both ends of the rail 15 in the longitudinal direction, one end of which is pivotally supported by the machine base 10 and the other end of which is the rail 1.
It is composed of a pair of links 21 and 21 which are pivotally supported by 5. As shown in FIGS. 3 and 8, one end of the link 21 on the front side is pivotally supported by a fixing piece 22 provided on the machine base 10, and as shown in FIGS. One end is pivotally supported by the rear standing wall 12 via a fixing member 23.

This rail support mechanism 20 is designed so that it can be replaced with another rail 15 having a different groove 16 width of the rail 15 so as to accommodate various screw diameters of the screws S.
It is configured to include an attachment / detachment mechanism 24 that enables attachment / detachment. As shown in FIGS. 2, 3 and 4, the attachment / detachment mechanism 24 of the rail support mechanism 20 includes a shaft pin 25 detachably provided at the other end of the link 21 and fixable with a screw 26, and a rail 1.
5 and an insertion hole (not shown) through which the shaft pin 25 is inserted.

Reference numeral 30 is a supply unit for supplying the screws S to the rail 15 in the accommodation unit 11. This supply unit 30 is a rail 1
A squeege plate 31 which is supported movably up and down on the side of 5 and scoops up the screws S in the accommodating portion 11 to a position higher than the rail 15 and moves the screws S onto the opening edge 16a of the rail 15 when moving upward; A scooping plate support mechanism 32 that supports the scooping plate 31 so as to be movable up and down, and a scooping plate driving mechanism 40 that moves the scooping plate 31 up and down. A pair of scoop plates 31 are provided, and each scoop plate 31 is provided on each of the left and right sides of the rail 15. As shown in FIGS. 8 and 10, the scooping plate support mechanism 32 includes the standing wall 1
Support shaft 3 which is installed between two and is provided parallel to the rail 15.
3 and a supporting arm 34 which is provided on the squeegee plate 31 and supports the squeegee plate 31 on the supporting shaft 33 so as to be swingable around the supporting shaft 33. Support shaft 33
Are provided on the left and right lower sides of the rail 15, respectively, and the support arm 34 is pivotally supported by a support shaft 33 on the opposite side of the squeeze plate 31 to which it is attached with the rail 15 interposed therebetween. The side wall 13 of the accommodating portion 11 is formed in such a shape that the bent curved surface 31a on the outer side of the scooping plate 31 comes into sliding contact when the scooping plate 31 swings.

Reference numeral 35 denotes a guide plate of the scooping plate 31 provided between the scooping plate 31 and the rail 15, and an opposing end edge 31b of the scooping plate 31 facing the rail 15 when the scooping plate 31 swings. It is formed along the shape. That is, the guide plate 35 has an arc surface centered on the support shaft 33. Further, the guide plate 35 can be moved and positioned so that the upper edge 35a of the guide plate 35 can be continuous with the opening edge 16a of the rail 15. That is, the guide plate 35 is movably supported on the support shaft 33 by a fixed arm 36 so as to be movable along an arc around the support shaft 33, and further, As shown in FIG. 7, it is fixed to the standing wall 12 by a screw 38 via a long hole 37 so that it can be positioned at an appropriate moving position. The shapes of the arms 34 and 35 are different from the one support shaft 33 on which the arms are pivotally supported and the other support shaft 33.
It is bent so as not to interfere with. In addition, as shown in FIGS. 18 and 19, the shape of the support arm 34 is such that the other support shaft 33 does not interfere with the other support shaft 33 that is different from the one support shaft 33 that is pivotally supported. It also includes an arc-shaped elongated hole 34a through which the shaft 33 can pass.

The scooping plate drive mechanism 40 is shown in FIGS.
As shown in FIGS. 9 and 10, the drive motor 42 (rotation speed is 23 RPM in the embodiment) provided on the machine base 10 via the mounting bracket 41 and the rail on the machine base 10 via the mounting bracket 41. 15, a drive shaft 43 provided in parallel with the drive motor 42, a driven shaft 44 provided in the machine base 10 in parallel with the drive shaft 43 through the mounting bracket 41, and rotated with the driven shaft 44. Support arm 34 of the above-mentioned scooping plate 31
A push-up cam 45 having a pin 45a for pushing up
Push-up cam rotation mechanism 4 that transmits the rotation of the driving shaft 43 to the push-up cam 45 to rotate the push-up cam 45.
6 is provided. As shown in FIGS. 18 and 19, the push-up cam 45 includes a flat cam that pushes up the roller cam follower 34b provided on the support arm 34.

The push-up cam 45 and the push-up cam rotating mechanism 46 are provided in a pair, and are provided at the front and the rear in correspondence with the pair of squeeze plates 31, respectively. Each of the push-up cam rotation mechanisms 46 includes a driving gear 47 provided on the driving shaft 43.
And a driven gear 48 which is provided on the driven shaft 44 so as to move together with the push-up cam 45 and which meshes with the driving gear 47. The driving gear 47 is a partial gear in which teeth are formed on a part of the circumference, and the driven gear 48 is a full-circle gear having the same number of teeth as the driving gear 47. The phases of the front and rear driving gears 47 are set so that the push-up cams 45 alternately push up the left and right squeeze plates 31. One cycle of the driving shaft 43 makes one cycle.

As shown in FIGS. 2 and 7, the driven shaft 44 is supported by the driven shaft support plate 50, and the driven shaft support plate 50 is attached to the mounting bracket 41 so as to be movable in position. There is. Specifically, the driven shaft support plate 50
Is mounted on the mounting bracket 41 so as to be rotatable about the driving shaft 43. Reference numeral 51 is a positioning mechanism for positioning the driven shaft 44 at a required position. In this positioning mechanism 51, a long hole 52 having an arc centered on the driving shaft 43 is provided in the mounting bracket 41, and a screw 53 which is inserted into the long hole 52 and is screwed into the driven shaft support plate 50.
The driven shaft 44 is positioned at a required position by tightening the screw 53. As a result, the push-up cam 4
5, the amount by which the supporting arm 34 of the scooping plate 31 is pushed up is adjusted so that the opposite end edge 31b of the scooping plate 31 facing the rail 15 does not interfere with the screws S on the rail 15 at the pushing top dead center. So that it is adjustable.

Further, in the adjusting mechanism of the pushing amount of the pushing cam 45, as shown in FIGS. 18 and 19, the driven shaft 44 is fixed and the pushing cam 4 is moved with respect to the driven shaft 44.
It also includes a structure in which 5 is movable and can be positioned at an appropriate position with a bolt 54.

Reference numeral 60 denotes an inertial force applying mechanism for moving the rail 15 back and forth so as to apply an inertial force in the discharging direction to the screws S inserted in the groove 16 of the rail 15. As shown in FIGS. 4, 5, 6 and 9, the inertial force imparting mechanism 60 includes a driving gear 61 provided on the driving shaft 43 and a driven gear meshing with the driving gear 61 provided on the driven shaft 44. Gear 62,
A disk cam 63 having a cam surface 66 provided on the driven shaft 44 so as to move together with the driven gear 62 and having a step formed in the axial direction of the driven shaft 44 on the side opposite to the screw S is provided on the rail 15. A cam follower 64 that contacts the disc cam 63,
The cam follower 64 is provided with a spring 65 for urging the rail 15 toward the discharge side of the screws S so that the cam follower 64 is pressed by the cam surface 66 of the disk cam 63.

As shown in FIG. 12, the cam surface 66 of the disc cam 63 has a gentle slope 66a that rises gently and rises, and a steep slope 66b that suddenly drops from the gentle slope 66a. From this steep slope 66b to the gentle slope 66a. A plurality of cam ridges 67 (9 ridges in the embodiment) forming the step 66c are provided. As a result, the cam follower 64 becomes the cam mountain 67.
When the rail 15 is disengaged and falls into the step 66c, the rail 15 rapidly moves forward, so that an inertial force in the discharging direction is applied to the screws S. In the embodiment, the gear ratio between the driving gear 61 and the driven gear 62 makes one rotation (one cycle) on the driving shaft 43.
In this case, the rail 15 is set so that it can be moved back and forth 30 times. Further, the squeeze plate is driven so as to stop the operation of the squeeze plate 31 for a certain period of time during which the inertial force imparting mechanism 60 operates (rotation angle 220 ° to 0 ° to 30 ° of the driving shaft 43 shown in FIGS. Lifting cam 4 of mechanism 40
The operation timing of the push-up cam rotating mechanism 46 for rotating the 5 is set.

70 is provided above the rail 15 via a holder 70a so as to be swingable and the projecting amount is variable.
It is a brush that removes the screws S scattered on the top. Reference numeral 70b is a screw for positioning and fixing the brush 70 to the holder 70a at an appropriate protruding position of the brush 70. Reference numeral 71 denotes a swing shaft that swingably supports the brush 70 via a holder 70a, and is laid between the standing walls 12. Reference numeral 72 is a brush drive mechanism for swinging the brush 70. As shown in FIG. 2, the brush drive mechanism 72 includes a large link 75 that swings a small link 73 integrally provided on the swing shaft 71 and returns to the original position by a spring 74. Reference numeral 76 is an operation cam which is provided on the drive shaft 43 and intermittently operates the large link 75 against the urging force of the spring 74. In addition, the inertia force applying mechanism 60 operates for a certain period (see FIG.
4 to 16 the rotation angle of the drive shaft 43 shown in FIG.
The operating timing of the brush drive mechanism 72 is set so as to stop the operation of the brush 70.

Reference numeral 80 denotes a passage opening 1 for screws S which are provided on the upright wall 12 of the accommodating portion 11 and move on the rail 15 to be discharged.
A shutter for opening and closing 7. As shown in FIG. 11, the shutter 80 is provided on the upright wall 12 on the front side so as to be vertically movable, and is normally biased by a spring 81 in the closing direction. Reference numeral 82 denotes a shutter drive mechanism that closes the shutter 80 when the screws S of the scooping plate 31 are scooped up and opens the shutter 80 when the screw S is not scooped up by operating in synchronization with the scooping plate drive mechanism 40 to open and close the shutter 80.
The shutter drive mechanism 82 is composed of a cam 84 which is provided on the driving shaft 43 and pushes up the shutter 80 against the biasing force of the spring 81 via the intermediate member 83 to open it.

Reference numeral 90 is a take-out portion for the screws S. In this take-out portion 90, a stopper 91 for stopping the movement of the screws S is provided at the end of the rail 15 on the discharge side, and the screws S stopped by the stopper 91 are pressed from above to engage the head Sb. The screws S can be taken out by the bit B which is fitted. As shown in FIG. 13, the stopper 91 is provided along the side surface of the rail 15 and has a leaf spring 92 whose rear end is fixed to the rail 15, and the leaf spring 92.
The rail 15 is formed by bending the leaf spring 92 at the front end of the rail 15.
The shaft portion Sa of the screws S in the groove 16 of the rail 15 is inserted into the groove 16 of the rail 15 through the opening 93 provided in the side wall 13 of the rail 15.
And a projecting portion 94 for pressing. 95 is provided on the machine base 10, and the tip of the bit B is attached to the rail 15
Is a guide member that guides the head Sb of the screws S stopped at the discharge side end of the.

Further, as shown in FIG. 4, the rotation angle of the link 21 of the rail support mechanism 20 is such that when the rail 15 is pushed when the screw S is taken out by the bit B, the rail 15 applies an inertial force. The cam follower 64 of the inertial force imparting mechanism 60 is set to be separated from the cam surface 66 of the disk cam 63 by retracting against the biasing force of the spring 65 of the mechanism 60.

Reference numeral 100 denotes an optical detection type screw presence / absence detection unit 100 for detecting whether or not the screws S stopped by the stopper 91 are present. Further, in the present apparatus, the drive motor 42 is stopped when a predetermined time has elapsed after the presence or absence of the screw type presence / absence detection unit 100 is detected, and the drive motor 4 is detected when the screw type presence / absence detection unit 100 detects the absence.
A motor controller (not shown) for starting the motor 2 is provided.

Next, the operation of the screw feeding device according to this embodiment will be described with reference to the process drawings for one rotation (one cycle) of the driving shaft 43 as shown in FIGS. 14 to 16. An appropriate amount of screws S is put in the screws accommodation space 14 of the accommodation portion 11 in advance. And the drive motor 42
When the drive shaft 43 is started, the drive shaft 43 rotates, and in one rotation of the drive shaft 43, the squeegee plate drive mechanism 40, the inertial force imparting mechanism 60, the brush drive mechanism 72, and the shutter drive mechanism 82 operate for one cycle.

First, the scooping plate drive mechanism 40 operates.
The inertial force imparting mechanism 60 is always operating, and the shutter drive mechanism 82 closes the shutter 80 (FIG. 14 (a)-
(B)). Thereby, first, one of the pair of scoop plates 31 moves up and down (Fig. 14 (a)-
(F)). As a result, the screws S in the accommodating portion 11 are scooped up to a position higher than the rail 15, and are scattered on the opening edge 16a of the rail 15, and the other scooping plate 3 on the opposite side.
Move to 1 side. Next, the other scooping plate 31 moves up and down (FIGS. 14 (e) to 15 (l)). In this case, since the scooping plate 31 moves up and down along the guide plate 35, the screws S can be scooped up without leaking. Also,
Since the scooping plate drive mechanism 40 is configured by using the push-up cam 45, it can be driven intermittently and its timing can be easily adjusted.

As a result, the screws S in the accommodating portion 11 are scooped up to a position higher than the rail 15, and the rail 15
Is sprayed on the opening edge 16a of the No. 1 and moves to the one side of the opposite scooping plate 31 on the opposite side. In the case where the posture of the screws S is downward and is caught in the groove 16 of the rail 15 in the process of spreading the screws S, the shaft portion Sa of the screws S is inserted into the groove 16 and the opening of the groove 16 is opened. The head Sb of the screws S is supported by the edge 16a. In this case, since the screws S are scattered on the rails 15, the postures of the screws S are easily reversed, and therefore the chances of being caught in the groove 16 of the rail 15 during this reversal increase, so that the screws S are The probability of being inserted into the rail 15 is increased, and the screws S are reliably supplied to the rail 15. Further, unlike the conventional case in which the screws S are supplied from the dipper to the rails 15 and supplied to the rails 15, the screws S are supplied directly to the rails 15, so that the screws S are reliably supplied. Furthermore, since the squeeze plate 31 is provided on the left and right, the screws S move back and forth alternately, which increases the chances of the screws S encountering the rail 15, and in this respect as well, the screws S The probability of being inserted into 15 becomes high. Further, the screws S are mixed well and the housing portion 11
Bias within is eliminated.

In this case, the shutter drive mechanism 82 closes the shutter 80 (FIGS. 14B to 15).
(K)) Therefore, when the screws S are sprinkled, the passage opening 1
Since 7 is to be closed, it is possible to prevent the screws S to be scattered from entering the passage opening 17 and being caught or jumping out. Further, during this time, although the inertial force imparting mechanism 60 is operating, since the shutter 80 is closed, the screws S are not discharged from the passage port 17.

Then, when the other scooping plate 31 reaches the lower position (FIG. 15 (l)), the cam of the shutter drive mechanism 82 pushes up the shutter 80, and the shutter 80 opens (FIGS. 16 (m) to (p). ) -FIG. 14 (a)). In this case, since the inertial force imparting mechanism 60 is operating, the screws S are discharged from the passage 17 of the screws S. Specifically, when the cam follower 64 of the inertial force imparting mechanism 60 is disengaged from the cam crest 67 and falls into the step 66c, the rail 15 rapidly moves forward due to the urging force of the spring 65 (in the embodiment, the rail 15 is moved per cycle). Since the screw S is operated about 30 times), an inertial force in the discharging direction is applied to the screws S. Therefore, the screws S on the rail 15 gradually move to the front side and are gradually discharged from the passage opening 17. In this case, the rail 15 is the rail 2 which is the rail support mechanism 20.
Since it is supported by No. 1 and is moved by the disc cam 63 via the cam follower 64, the structure is relatively simple and an inertial force can be surely given.

In this case, since the screws S move on the horizontal rail 15 as shown in FIG. 17A, the head Sb is different from the case where the conventional rail 15 is inclined.
Since the surface is not inclined with respect to the upper end surface of the rail 15, the situation in which the heads Sb of the adjacent screws S are overlapped with each other is suppressed, and thus the presser plate becomes unnecessary and the presser plate is not necessary. The gap adjustment with the head Sb becomes unnecessary. Further, since the heads Sb of the screws S are prevented from overlapping with each other, a situation in which the screws S are locked by the wedge action and the discharge is stopped is prevented. In particular, in the past, even if a holding plate was provided, there was a situation in which the head screw Sb was locked by a thin dish screw, but in the present embodiment, as shown in FIG. 17B, the dish screw also has a wedge action. The situation in which the discharge is stopped due to being locked is prevented.

In the discharging process of the screws S, the brush driving mechanism 72 operates (FIGS. 15 (i) to 16).
(P)). As a result, the brush 70 swings above the rail 15, and the screws S scattered on the rail 15 are removed by the brush 70. Therefore, unnecessary screws S that are not inserted into the groove 16 of the rail 15 and are placed on the rail 15 are dropped from the rail 15, and therefore the screws S are reliably moved.

The operation of the brush 70 is stopped after the operation of the squeegee plate 31 is stopped for a certain period (the rotation angle of the drive shaft 43 is 220 ° to 0 ° to 30 ° in FIGS. 14 to 16) during which the inertial force applying mechanism 60 is operated. Is stopped for a certain period during which the inertial force imparting mechanism 60 operates (rotational angle 240 ° to 0 ° to 150 ° of the driving shaft 43 in FIGS. 14 to 16), so only the inertial force imparting mechanism 60 operates during this period. Therefore, during the movement of the screws S, a time during which the screws S are not sprayed and a time during which the screws S on the rail 15 are not wiped by the brush 70 are provided. Therefore, during this period, an element that hinders the movement of the screws S can be removed, so that the screws S can be reliably moved.

In this way, when the screws S discharged through the passage opening 17 by the rail 15 reach the discharge side end of the rail 15, the stopper 91 stops the movement thereof. In this state, the screw B stopped by the stopper 91 is pressed from above by the bit B to be engaged with the head Sb, and the screw S is taken out and used. Since the tip of the bit B is guided by the guide member 95, it is surely engaged with the head Sb of the screw S stopped at the discharge side end of the rail 15. In this case,
As shown in FIG. 3, the stopper 91 extends from the opening 93 provided in the side wall 13 of the rail 15 at the front end of the leaf spring 92 to the rail 15.
Screw S in the groove 16 of the rail 15
Since the shaft portion Sa of the screws S is pressed, the head portion Sb is pressed as compared with the conventional stopper. , It is difficult to get in the way, and the removal by the bit B is easy.

At this time, since the rail 15 is pressed by the bit B, it moves rearward against the biasing force of the spring. In this case, since the stopper 91 is provided on the rail 15 unlike the conventional case, the stopper 91 moves in the same direction as the rail 15 moves back and forth. To be prevented. Further, in this case, since the rotation angle of the link 21 of the rail support mechanism 20 is set so that the cam follower 64 of the inertial force imparting mechanism 60 can be separated from the cam surface 66 of the disc cam 63, the cam follower 64 is set to the disc cam 63. Coming off the cam surface 66 of
Therefore, since no inertial force is applied to the rail 15, vibration is not applied to the rail 15, and troubles such as mistakes in taking out the screws S are suppressed.

In the take-out section 90 for the screws S, the screws presence / absence detection unit 100 detects whether or not there is the screws S stopped by the stopper 91, and the presence of the screws presence / absence detection unit 100 is detected. When a predetermined time has elapsed after that, the motor control unit stops the drive motor 42. Therefore, for example, when the worker leaves the work site and does not use the device, when the screw B is taken out by the bit B for a predetermined time, the drive motor 42 is stopped, so that the drive motor 42 is uselessly driven. It is suppressed and power saving is achieved. When the screw type presence / absence detection unit 100 detects the absence, the motor control unit starts the drive motor 42 and the steady operation is performed.

Next, a case where the screws S having different outer diameters of the shaft portions Sa of the screws S are handled will be described. 18 and 19 show various outer diameters (2 mm (a), 2.3 mm).
(B) 2.6 mm (c), 3 mm (d), 4 mm
(E), 5 mm (f)) corresponding to the mounting state of the rail 15 is shown. In FIGS. 18 and 19, as described above, the support arm 34 is different from the one support shaft 33 on which the one support arm 34 is pivotally supported and the other support shaft 3 on the other side.
3, an arcuate slot 34a through which the other support shaft 33 can pass is formed so as not to interfere with the other support shaft 33. The push-up cam 45 is shown as a flat cam that pushes up the roller cam follower 34b provided on the support arm 34. Furthermore, the mechanism for adjusting the amount of lifting of the lifting cam 45 is configured so that the driven shaft 44 is fixed, the lifting cam 45 can be moved with respect to the driven shaft 44, and the bolt 54 can be positioned at an appropriate position. Has been done.

Explaining with reference to FIG. 18 and FIG. 19, first, the groove 1 of the rail 15 corresponding to the outer diameter of the screws S.
Replace with another rail 15 having a different width. At this time,
As shown in FIG. 7, the screw 3 that fixes the guide plate 35
8 is loosened, the guide plate 35 is moved along an arc centered on the support shaft 33, and is separated from the rail 15 and opened.
Next, in the attachment / detachment mechanism 24 of the rail 15, the link 21
Remove the shaft pin 25 that is detachably attached to the other end of
The rail 15 is removed by pulling it out from the insertion hole provided in the rail 15. Then, change the rail 15 to the link 21.
Bring the shaft pin 25 to the link 21 and the rail 15.
Insert it through the insertion hole of. In this case, since the outer diameters of the various screws S can be dealt with by simply exchanging the rail 15, versatility is increased. In particular, in the past, not only the rail 15 but also the dipper had to be replaced, which was complicated. However, in the present embodiment, only the rail 15 needs to be replaced, so that the handling is extremely easy. In addition, the attachment / detachment mechanism 24 of the rail 15 is
Since the structure is such that the shaft pin 25 is simply attached and detached, the structure is simple and the replacement work is easy.

After the replacement of the rail 15 is completed, the guide plate 35 is adjusted. That is, as shown in FIG. 7, the guide plate 35 is moved along a circular arc centered on the support shaft 33 via the fixed arm 36 so that the upper end edge thereof can be continuous with the opening edge 16 a of the rail 15. Abut on 15. Next, at this moving position, the standing wall 12 is fixed and positioned by the screw 38. In this way, the guide plate 35 can be moved and positioned along an arc centered on the support shaft 33, so that when the rail 15 is replaced, the gap between the upper edge 35a of the guide plate 35 and the rail 15 can be adjusted, and various Rails can be replaced, which increases versatility.

Then, the positioning mechanism 51 of the lifting cam 45 positions the lifting cam 45 at a desired position, and the supporting arm 34 of the squeeze plate 31 of the lifting cam 45 is positioned.
The amount of pushing up is adjusted to adjust the position of the facing end edge 31b of the scooping plate 31 facing the rail 15 at the pushing top dead center. That is, as shown in FIGS. 18 and 19, the width of the rail 15 increases as the outer diameter of the screws S increases, and the guide plate 35 increases accordingly.
The position of the upper edge 35a of the is moved downward. Therefore, along with this, the position of the facing end edge 31b of the scooping plate 31 that faces the rail 15 moves relatively upward, and this is corrected. In this adjustment, the step between the scooping plate 31 and the guide plate 35 is eliminated, and the facing edge 31b of the scooping plate 31 does not interfere with the screws S on the rail 15 so that the facing edge of the scooping plate 31 does not interfere. Adjust the position of 31b. Therefore, since there is no step between the scooping plate 31 and the guide plate 35, the screws S are prevented from being caught, and the situation in which the movement of the screws S on the rail 15 is hindered is suppressed. The positioning mechanism 5
1 also works in the same manner for adjusting the driven shaft support plate 50. Also, the amount of protrusion of the brush 70 is adjusted. As a result, the tip of the brush 70 is adjusted according to the head height of the screws S, so that the brush 70 can be reliably removed.

In the above embodiment, the rail 15 is supported so as to be substantially horizontal and can be moved back and forth, and is moved back and forth by the inertial force imparting mechanism 60 to move and eject the screws S, but the invention is not limited to this. Instead, the rails 15 may be slanted and the screws S may be moved and discharged by natural fall as in the conventional case, and the screw S may be appropriately changed. However, in order to prevent the heads Sb of the screws S from overlapping with each other, it is desirable that the rail 15 be driven substantially horizontally.

[0053]

As described above, according to the screw feeder of the present invention, the scoop plate of the supply portion scoops up the screws in the accommodating portion during the upward movement so that the screws are placed on the opening edge of the rail. Since it is sprayed, the posture of the screws can easily be reversed, and the chance of encountering the groove of the rail increases, so the chance of being caught in the groove of the rail increases, thus increasing the probability that the screws will be inserted into the rail. can do. Therefore, the screws can be reliably supplied to the rail.
Further, since the screw is directly supplied to the rail, it is possible to reliably supply the screw as compared with the case where the screw is supplied from the dipper to the rail and supplied to the rail as in the conventional case.

When a pair of squeeze plates are provided on both the left and right sides of the rail, the screws go back and forth alternately, which increases the chances of the screws coming into contact with the rail. It is possible to increase the probability that the screws will be inserted into the rail. Further, the screws are mixed well, and it is possible to eliminate the unevenness in the accommodating portion.

Further, in the case where the rail is supported substantially horizontally and longitudinally so as to be movable back and forth, and an inertia force in the discharge direction is applied to the screws inserted in the groove of the rail by the inertia force imparting mechanism to discharge the screws. In comparison with the case where the conventional rail is slanted, since the head surface is not slanted with respect to the upper end surface of the rail, the heads of adjacent screws overlap each other. This makes it possible to suppress the situation, and thus it is possible to eliminate the need for the pressing plate and the adjustment of the gap between the pressing plate and the head. Also,
Since the heads of screws are prevented from overlapping,
It is possible to prevent the situation where the screws are locked by the wedge action and the discharge is stopped. In particular, in the past, even if a pressing plate was provided, there was a situation where the dish screw with a thin head would lock, but in the present invention, the situation where the dish screw is also locked by the wedge action and the discharge is stopped is prevented. can do.

Further, when the rail can be replaced with another rail having a different groove width, the outer diameter of various screws can be dealt with by simply exchanging the rail, thus increasing versatility. In particular, in the past, not only the rail but also the dipper had to be replaced, which was cumbersome, but in the present invention, only the rail needs to be replaced, which makes the handling extremely easy.

Further, when the rail support mechanism is composed of a pair of links, the structure becomes simple. Furthermore, when the attachment / detachment mechanism of the rail support mechanism is configured to include the shaft pin, the structure is simple because the shaft pin is only attached / detached, and the rail replacement work can be easily performed. Also, when a guide plate along which the scoop plate is provided is provided,
It is possible to prevent screws from leaking between the scooping plate and the rail, and it is possible to reliably supply screws.

The guide plate has an arcuate surface centered on the support shaft, and can be moved and positioned along the arc centered on the support shaft so that the upper end edge of the guide plate can be continuous with the opening edge of the rail. When the rail is replaced, the clearance between the upper edge of the guide plate and the rail can be adjusted when the rail is replaced, and rails of various thicknesses can be replaced.
Versatility can be increased.

Further, when the squeeze plate drive mechanism is constructed by using the push-up cam, since the cam is used, it can be driven intermittently and its timing can be easily adjusted. it can. Further, when the push-up cam rotation mechanism is configured to include the driving gear and the driven gear that is driven by the push-up cam, the timing adjustment based on the gear ratio can be easily performed.

Further, the driven shaft or the push-up cam is positionally movable, and the positioning mechanism adjusts the push-up amount of the push-up cam so that the position of the top dead center of the facing edge facing the rail of the squeege plate can be adjusted. In this case, this adjustment can eliminate the step between the scoop plate and the guide plate, and can prevent the opposite edges of the scoop plate from interfering with the screws on the rail. It is possible to prevent the screw from being caught, and it is possible to prevent a situation in which the movement of the screws on the rail is hindered.

When the inertial force imparting mechanism is constructed such that the cam follower provided on the rail is moved by the disc cam, the structure can be simplified and the inertial force can be surely imparted to the rail.

Further, when the brush is provided above the rail, the screws scattered on the rail are removed by the brush, so that unnecessary screws which are not inserted into the groove of the rail and are placed on the rail are provided. Can be dropped from the rail,
Therefore, the screws can be reliably moved. Further, since the amount of protrusion of the brush can be adjusted, the tip of the brush can be adjusted according to the head height of the screws, so that the brush can be reliably wiped.

Further, a shutter is provided which opens and closes a passage for screws to be discharged by moving on the rail, and the shutter driving mechanism closes the shutter when the screws of the squeeze plate are scooped and opens the shutter when not scooping. In this case, since the passage port is closed when the screws are scattered, it is possible to prevent the scattered screws from entering the passage port and being caught or jumping out.

Further, a stopper for stopping the movement of the screws is provided at the end of the rail on the discharge side, and the screws stopped by the stopper are pressed from above to engage the screws with a bit. When it can be taken out, the stopper is provided on the rail differently from the conventional one, so it moves in the same way as the rail moves back and forth, so it prevents the bit from interfering with things such as repulsion when pressing screws. can do.

Further, in the case where the stopper is provided at the front end portion of the leaf spring with a projecting portion which is inserted into the groove of the rail through an opening provided in the side wall of the rail to press the shaft portion of the screws in the groove of the rail. The shaft portion of the screws can be pressed by the projecting portion, so that compared with the case of pressing the head portion, it is less likely to get in the way and the bit can be taken out easily.

Furthermore, if the cam follower of the inertial force imparting mechanism is set so as to be separated from the cam surface of the disk cam when the rail is pushed when the screw is taken out by the bit, the cam follower is taken out when the screw is taken out. Since the rail is disengaged, no inertial force is applied to the rail, so that vibration is not applied to the rail, and accordingly, troubles such as mistakes in taking out screws can be eliminated.

Further, when the driving motor is stopped when a predetermined time has elapsed after the presence or absence of screws is detected by the presence or absence of screws, when the operator leaves the site and does not use the device. Since the drive motor can be stopped when the removal of the equal screws is stopped for a predetermined time, useless driving of the drive motor can be suppressed and power saving can be achieved.

If the operation of the squeeze plate is stopped for a certain period of time when the inertial force applying mechanism operates, a time period during which the screws are not spread is provided while the screws are moving. Therefore, during this period, an element that hinders the movement of the screws can be removed, and therefore the screws can be reliably moved.

Further, when the operation of the brush is stopped for a certain period of time when the inertial force applying mechanism operates, the time during which the screws do not remove the screws on the rails while the screws move. Therefore, during this period, an element that obstructs the movement of the screws can be removed during this period, so that the screws can be reliably moved.

[Brief description of drawings]

FIG. 1 is a perspective view of a screw feeding device according to an embodiment of the present invention viewed from the front side.

FIG. 2 is a perspective view showing a screw feeding device according to an embodiment of the present invention as viewed from the back side.

FIG. 3 is a side view showing a screw feeder according to an embodiment of the present invention.

FIG. 4 is another side view showing the screw feeding device according to the embodiment of the present invention.

FIG. 5 is a plan view showing a screw feeder according to an embodiment of the present invention.

FIG. 6 is a front view showing a screw feeder according to an embodiment of the present invention.

FIG. 7 is a rear view showing the screw feeding device according to the embodiment of the present invention.

FIG. 8 is a partial perspective view showing a screw feeder according to an embodiment of the present invention.

FIG. 9 is a perspective view showing a configuration of a drive unit of the screw feeding device according to the embodiment of the present invention.

FIG. 10 is a front sectional view showing a screw feeder according to an embodiment of the present invention.

FIG. 11 is a front view showing the configuration of the shutter of the screw feeding device according to the embodiment of the present invention.

FIG. 12 is a diagram showing a cam surface of a disk cam of the screw feeding device according to the embodiment of the present invention.

FIG. 13 is a partial perspective view showing a screw take-out portion of the screw feeding device according to the embodiment of the present invention.

FIG. 14 is a process diagram (a), (b), (c), (d), (e), and (f) showing the operation of the screw feeding device according to the embodiment of the present invention.

FIG. 15 is a process diagram (g), (h), (i), (j), (k), (l) showing the operation of the screw feeding device according to the embodiment of the present invention.

FIG. 16 is a process drawing (m) (n) (o) (p) showing the operation of the screw feeder according to the embodiment of the present invention.

FIG. 17 is a diagram (a) (b) showing a state of screws on a rail of the screw feeding device according to the embodiment of the present invention.

FIG. 18 is a view (a), (b), and (c) showing an adjustment state at the time of replacing the rail of the screw feeder according to the embodiment of the present invention.

FIG. 19 is a view (d), (e), (f) showing an adjustment state when the rails of the screw feeding device according to the embodiment of the present invention are replaced.

FIG. 20 is a perspective view showing an example of a conventional screw feeder.

FIG. 21 is a diagram showing a state of screws on a rail that causes a problem in the conventional screw feeder.

[Explanation of symbols]

 S Screws Sa Shaft part Sb Head part 10 Machine stand 11 Storage part 12 Standing wall 13 Side wall 14 Screws storage space 15 Rail 16 Groove 16a Open edge 17 Passage port 20 Rail support mechanism 21 Link 24 Attachment / detachment mechanism 25 Axis pin 30 Supply Part 31 Squid plate 31a Folded curved surface 31b Opposite end edge 32 Squid plate support mechanism 33 Support shaft 34 Support arm 35 Guide plate 35a Top edge 36 Fixed arm 40 Squib plate drive mechanism 42 Drive motor 43 Drive shaft 44 Drive shaft 45 Push-up cam 45a pin 46 push-up cam rotation mechanism 47 driving gear 48 driven gear 50 driven shaft support plate 51 positioning mechanism 60 inertial force applying mechanism 61 driving gear 62 driven gear 63 disc cam 64 cam follower 65 spring 66 cam surface 70 brush 72 72 brush drive mechanism 80 shutter 82 shutter Drive Structure 90 taken out portion B bit 91 stopper 92 leaf spring 94 projecting portion 100 screws presence detection unit

Claims (21)

[Claims] 1. An accommodating portion provided on a machine base for accommodating a large number of screws having a shaft portion and a head having a diameter larger than that of the shaft portion, and a shaft portion of the screws that protrudes from the inside of the accommodating portion to the outside. Has a groove that is inserted from the upper side, and a rail that supports the heads of the screws at the opening edge of the groove and guides the screws that are discharged from the inside of the housing to the outside, and screws on the rails inside the housing. In a screw feeder including a supply unit for supplying, the supply unit is supported so as to be vertically movable to the side of the rail, and when moving upward, the screws in the accommodating unit are scooped up and the screws are opened at the opening edge of the rail. A screw feeding device comprising: a scooping plate scattered on the scooping plate; a scooping plate supporting mechanism for supporting the scooping plate so as to be vertically movable; and a scooping plate driving mechanism for vertically moving the scooping plate. 2. The screw feeder according to claim 1, further comprising a pair of the scoop plates, each scoop plate being provided on each of the left and right sides of the rail. 3. A rail support mechanism for supporting the rail so as to be movable back and forth in a substantially horizontal and longitudinal direction, and an inertia for moving the rail back and forth so as to apply an inertial force in a discharging direction to screws inserted in a groove of the rail. The screw feeder according to claim 1 or 2, further comprising a force applying mechanism. 4. The rail supporting mechanism is provided with an attaching / detaching mechanism for attaching / detaching the rail so that the rail supporting mechanism can be replaced with another rail having a different groove width. Screw feeding device. 5. The rail supporting mechanism comprises a pair of links, each of which is provided at each of both longitudinal ends of the rail, one end of which is pivotally supported on the machine base side and the other end of which is pivotally supported by the rail. The screw feeder according to claim 3 or 4. 6. The attachment / detachment mechanism of the rail support mechanism is configured by a shaft pin removably provided at the other end of the link and an insertion hole provided in the rail and through which the shaft pin is inserted. Item 4. A screw feeder according to Item 4 or 5. 7. A support shaft provided on the machine base in parallel with a rail, and a support shaft provided on the scoop plate so that the scoop plate can swing about the support shaft. The screw feeder according to claim 1, 2, 3, 4, 5 or 6, wherein the screw feeder is provided with a supporting arm for supporting. 8. The screws according to claim 7, wherein a guide plate is provided between the squeeze plate and the rail, the guide plate having opposing end edges facing the rail of the squib plate when the squib plate swings. Feeder. 9. The guide plate has a circular arc surface centered on the support shaft, and is moved and positioned along a circular arc centered on the support shaft so that an upper end edge of the guide plate can be continuous with an opening edge of the rail. 9. The screw feeder according to claim 8, wherein the screw feeder is provided so as to be capable. 10. A drive motor provided on the machine base, the drive shaft provided on the machine base in parallel with the rails, which is rotated by the drive motor, and the machine frame. A driven shaft provided in parallel with the driving shaft, a push-up cam that is rotatably provided on the driven shaft and pushes up a support arm of the squeeze plate, and the rotation of the driving shaft is transmitted to the push-up cam to rotate the push-up cam. And a push-up cam rotating mechanism for causing the push-up cam to rotate.
The described screw feeder. 11. The push-up cam rotating mechanism comprises a drive gear provided on the drive shaft and a driven gear provided on the driven shaft so as to move together with the push-up cam and meshed with the drive gear. 11. The screw feeding device according to claim 10. 12. A positioning mechanism is provided which allows the driven shaft or the push-up cam to be moved in position and positions the driven shaft or the push-up cam at a required position, and a push-up amount for pushing up the support arm of the squeeze plate of the push-up cam. The screw feeding device according to claim 10 or 11, wherein the position of the top dead center of the opposite end facing the rail of the squeegee plate is adjustable by adjustment. 13. An inertial force applying mechanism, a driving gear provided on the driving shaft, a driven gear provided on the driven shaft and meshing with the driving gear, and a screw provided on the driven shaft so as to move together with the driven gear. A disc cam having a cam surface with a step formed in the axial direction of the driven shaft on the opposite side to the ejection side, a cam follower provided on a rail and abutting the disc cam, and the cam follower is pressed against the cam surface of the disc cam. 13. The screw feeder according to claim 10, 11 or 12, further comprising a spring for urging the rail on the discharge side of the screws. 14. A brush, which is swingable above the rail and has a variable protrusion amount, is provided with a brush that disperses screws scattered on the rail, and a brush drive mechanism that swings the brush. Claims 1, 2, 3, 4, 5, 6, 7,
The screw feeder according to 8, 9, 10, 11, 12 or 13. 15. A shutter which is provided on a wall portion of the accommodating portion and which opens and closes a passage opening for screws to be discharged by moving on a rail, and a shutter which is closed when the screws of the squeeze plate are scooped and closed when not scooped. 4. A shutter drive mechanism that opens and closes the shutter by operating in synchronization with the squeeze plate drive mechanism so as to open.
4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14 screw feeding device. 16. A stopper for stopping movement of screws is provided at an end of the rail on the discharge side, and the screws stopped by the stopper are pressed from above to engage the head with the screws. It is made possible to take out, 3,4,5,6,7,8,9,10,11,1.
The screw feeder according to 2, 13, 14 or 15. 17. A leaf spring, wherein the stopper is provided along a side surface of the rail and has a rear end portion fixed to the rail, and a rail formed by bending the leaf spring at a front end portion of the leaf spring. 17. The screw feeder according to claim 16, further comprising: a protrusion that is recessed into the groove of the rail through an opening provided in the side wall and presses a shaft portion of the screw in the groove of the rail. 18. The rotation angle of the link of the rail support mechanism is set so that when the rail is pushed when a screw is taken out by a bit, the rail moves backward against the biasing force of the spring of the inertial force imparting mechanism, 18. The screw feeder according to claim 13, 14, 15, 16 or 17, wherein the cam follower of the inertial force applying mechanism is set so as to be separated from the cam surface of the disc cam. 19. A screw type presence / absence detection unit for detecting whether or not there is a screw type stopped by the stopper, and the drive motor when the predetermined time has elapsed after the presence of the screw type presence / absence detection unit was detected. 12. A motor control unit for starting the drive motor when the screw type presence / absence detection unit detects the absence of the screw, and a motor control unit.
The screw feeder according to 12, 13, 14, 15, 16, 17 or 18. 20. The operation timing of the push-up cam rotating mechanism for rotating the push-up cam of the scooping plate drive mechanism is set so that the operation of the scooping plate is stopped for a certain period during which the inertial force applying mechanism is operated. Claim 1
0, 11, 12, 13, 14, 15, 16, 17, 18
Alternatively, the screw feeder according to item 19. 21. The operation timing of the brush drive mechanism is set so as to stop the operation of the brush for a certain period during which the inertial force applying mechanism operates.
The screw feeder according to 15, 16, 17, 18, 19 or 20.