JPS5928491B2 - Directional sorting device for rod-shaped articles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention provides a method for automatically feeding rod-shaped articles, such as stud bolts, whose one end surface is an R-shaped convex surface and the other end surface is a concave or flat surface from a storage section to an assembly machine. The present invention relates to a sorting device for sorting rod-shaped articles and sorting them out of their disordered directions and aligning them in the same direction.

The following is a description of an embodiment whose configuration is shown in the drawings.

As shown in Figures 1 and 2, 1 is a main body frame, 2 is a drive shaft rotatably supported on the rear part of the main body frame 1 via bearings 2a and 2b, and a gear 3 is added to one end of the drive shaft. A Geneva gear 5 having a pin 4 at the other end is attached.

The gear 3 meshes with a gear attached to a drive shaft 6a of a motor 6 provided on the side surface of the main body frame 1, and as the motor 6 rotates, the drive shaft 2 is rotated.

Reference numeral 8 denotes a driven shaft rotatably supported in the center of the main body frame 1 in parallel with the drive shaft 2 via bearings 8a and 8b, and has a groove at one end (not shown) that engages with the pin 4 of the Geneva gear 5. A Geneva gear 9 having forces at four locations is rotatably attached.

10 is a torque limiter attached to the end of the driven shaft 8;
A ball 10a interposed inside is pressed by the pressure of a spring 10b into a groove 9a formed on the side surface of the Geneva gear 9, thereby integrally connecting the driven shaft 8 and the Geneva gear 9.

Therefore, the driven shaft 8 rotates 1/4 of a rotation for every rotation of the drive shaft 2.

When a load above a certain level is applied to the Geneva gear 9, the ball 10a of the torque limiter 10 moves into the groove 9 of the Geneva gear 9.
a, the Geneva gear 9 becomes free with respect to the driven shaft 8, and only the Geneva gear 9 rotates, preventing a load from being applied to the driven shaft 8.

Reference numeral 11 denotes an index plate having a cross-sectional shape of an upper letter, which is attached to the center portion 1 of the driven shaft 8, and has four V-shaped notch grooves 12 provided at equal intervals on its outer periphery.

At this notch groove 12, a rod-shaped article 13 (hereinafter referred to as a work)
is held and transferred from the bottom to the top.

Reference numeral 14 denotes a V block provided at the rear lower part of the index plate 11 , the upper part 14 a of which is located in the concave cavity 11 a of the index plate 11 , and supplies the workpiece 13 to the notch groove 12 .

15 is a pipe chute which is inserted into the inside of the main body claim 1 from the side and whose tip is provided so as to be able to supply the workpiece 13 to the block 14. The pipe chute is inclined at an angle of about 45 degrees from the horizontal plane, and the workpiece 13 is placed under its own weight. It doesn't seem to be moving.

Note that the workpiece 13 is inserted into the pipe chute 15 at regular intervals regardless of its direction.

Reference numeral 16 denotes a cover provided to cover the upper part of the index plate 11 to prevent the workpiece 13 from jumping out from the notch groove 12.

17 is located in front of the index plate 11 at approximately 30° from the horizontal plane.
A chute for transporting workpieces installed at an angle, as shown in Fig.
8 is the formation.

The workpiece 13 transported by the index plate 11 is rotated by 90° by a reversing arm 19 or 19', which will be described later.
It is transformed and moves under its own weight.

The reversing arms 19, 19' are arranged on both sides of the starting end of the chute 17, and their rear parts are fixed to the operating rods 21, 21' of the low clean lens 20.degree. 20'.

Therefore, when the rotary solenoid 20 or 20' is energized, the reversing arm 1 fixed to its operating rod 21 or 21'
9 or 19'.

For example, when the right rotary solenoid 20' is energized and the reversing arm 19' is rotated as shown in FIG. Since it is blocked, it is rotated clockwise, reversed by about 90 degrees, and moved on the V-groove 18.

Furthermore, when the left rotary solenoid 20 is energized and the reversing arm 19 is rotated as shown in FIG. It is rotated, reversed by about 90 degrees, and moves on the groove 18.

Detection mechanisms 22 and 22' are provided on both sides of the upper part of the index plate 11, and detect the convex surface of the workpiece 13 held in the notch groove 12 of the index plate 11 by pinching it from both sides and conveyed to the upper part.

That is, the detection arms 23 and 23' are connected to the index plate 11.
The detection arm 23 is attached to the main body frame 1 via a pivot 24°24' so as to be able to swing from side to side.
, 23' is stretched between the springs 25.

Cam followers 26 and 26' are provided on the lower surfaces of the detection arms 23 and 23', and are always in contact with the side surface of a cam 27 fixed to the center of the drive shaft 2.

Therefore, as the drive shaft 2 rotates, the detection arm 23, 23' swings about the pivot shafts 24, 24' due to the relationship between the cam 27 and the cam followers 26, 26'.

The side surface of the cam 27 is tapered so that the detection arms 23 and 23' swing once for each rotation of the drive shaft 2.

Reference numeral 28 denotes a detection head attachment stand attached to the end of the drive shaft 2, and a detection head 29 is attached to a part of this stand.

Therefore, the drive shaft 2 rotates, and the detection head mounting base 28 rotates accordingly. When the detection head 29 is detected by a sensor 31 attached to the main body frame 1 via a bracket 30, the rotational position of the cam 27 can be determined.

5 and 6 are shown on the side of the tip of the detection arm 23゜23'.
As shown in the figure, workpiece holding members 32, 32' are provided, into which measuring elements 33, 33' are slidably inserted.

The protruding end surfaces of the workpiece holding members 32, 32' are formed into concave surfaces, and the ends of the probes 33, 33' are made to protrude.

Reference numerals 34 and 34' denote contact arms pivotally attached to pivots 35 and 35', and the workpiece holding members 32 and 32' are always supported by the stored elasticity of springs 37 and 37' wound around the stoppers 36 and 36'. It is pressed to the side, and a part of it is in contact with the probes 33 and 33'.

38, 3B' are proximity switches, contact arms 34, 3
When the distance to 4' falls within a predetermined range, it becomes "ON" and current flows.

Contact arms 34 and 34' are both proximity switches 38 and 3
Stoppers 36 and 36' prevent it from coming too close to 8'.

One of the proximity switches 38, 3B' is connected to the rotary solenoid 20 on the left side, and the other proximity switch 38' is connected to the rotary solenoid 20' on the right side.

In the above configuration, when the workpiece 13 is supplied onto the block 14 through the pipe chute 15, the motor 6 rotates, and the drive shaft connected to the motor 6 via the gears 3 and 7 rotates.

Then, the driven shaft 8 is rotated by 1/4 due to the relationship between the Geneva gears 5 and 9 provided on the drive shaft 2 and the driven shaft 8, and the index plate 11 rotates while holding the work 13 in the notch groove 12. move to the detection position.

At this time, the detection arms 23, 23' are spread apart by the cam 27, and when the workpiece 13 comes to the detection position, they return to the center.
The end portion of the work 13 is held by the work holding members 32, 32'.

In this state, the rotation of the motor 6 is temporarily stopped, and the workpiece 13 is
Select the direction of.

That is, when the detection arms 23 and 23' hold the workpiece 13, for example, if the convex surface is located on the left side, the convex surface of the workpiece 13 will fit into the workpiece holding member 32 of the left detection arm 23 and push the probe 33. It turns out.

When the probe 33 is pushed in, the contact arm 34 pivots to the pivot 35.
It swings around against the spring 37 until it comes into contact with the stopper 36.

Then, the contact of the proximity switch 38 becomes "ON", energizing the rotary solenoid 20, rotating the reversing arm 19, and rotating the motor 6 again.

When the motor 6 rotates, the cam 27 causes the detection arms 23 and 23' to spread apart, rotates the index plate 11, and discharges the workpiece 13 on the notched groove 12 onto the chute 17.

The workpiece 13 discharged onto the chute 17 rolls and is reversed approximately 90 degrees counterclockwise by the non-rotating right reversing arm 19', the convex surface first moves over the groove 18, and is transferred to the assembly machine ( The power shown is supplied.

When the index plate 11 rotates 1/4, the excitation of the rotary solenoid 20 is released, the reversing arm 19 returns to the chute 17, and the next detection operation is performed.

At this time, if the convex surface of the workpiece 13 is located on the right side contrary to the above, the convex surface will fit into the workpiece holding member 32' of the right detection arm 23', the same operation as described above will be performed, and the right low clean lens 20' is excited and the reversal arm 1
Turn 9' tb times.

Therefore, the workpiece 13 that has been rolling on the chute 17 is moved clockwise by about 9 degrees by the unrotated left reversing arm 19.
It is reversed by 0°, moves on the V-groove 18 with the convex surface first, and is fed to the assembly machine.

Note that the detection arm 23 or 23' on the side that holds the concave or flat surface of the workpiece 13 is connected to the workpiece holding member 32 or 32.
Since the workpiece 13 does not fit into the inside, the probe 33 or 33
' does not move and contact b1r of proximity switch 38 or 38'
The rotary solenoid 20 or 20' is not turned on and the rotary solenoid 20 or 20' is not excited.

In this way, the workpiece 13 fed onto the block 14 through the pipe chute 16 regardless of the direction is detected by the detection mechanism 22.
, 22', and the chute 17
At the top, the reversing arms 19 and 19' align the directions in a fixed direction and feed them to an assembling machine.

As explained above, the present invention includes an index plate fixed to the center of a driven shaft connected to a drive shaft via a Geneva mechanism etc., and having V-shaped notch grooves provided at equal intervals on the outer circumference of the driven shaft. A detection mechanism that detects the direction of the workpiece held in the notch groove, which is swung apart and oscillated by a short circuit for supplying the workpiece and a cam provided on the drive shaft, and a workpiece conveyance system provided in front of the index plate. The structure consists of a pipe chute and a driving means provided on both sides of the transport chute and operated by the detection mechanism to rotate the reversing arm, so that the workpieces fed from the workpiece storage section through the pipe chute regardless of the direction thereof are The direction is individually selected by the detection mechanism, and then the direction is aligned in a fixed direction by the reversing arm operated by the detection mechanism on the chute, and it is automatically fed to an assembly machine, etc., so there is no need to do it manually as in the past. There is no need to align the directions, improving work efficiency.

Also, since it is mechanically interlocked, operation is reliable.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional plan view showing the structure of the device according to the present invention, Fig. 2 is a vertical side view thereof, Fig. 3 is a perspective view showing the positional relationship between the chute and the reversing arm, and Fig. 4 is the operation of the reversing arm. The explanatory drawings, FIG. 5, and FIG. 6 are a plan view and a side view of the detection mechanism. 2... Drive shaft, 5, 9... Geneva gear, 3... Driven shaft, 11... Index plate, 12... Notch Groove, 13... Work, 14... V block, 15... Pipe chute, 17... Uyut, 19° 191
100000 Reversing arm, 20, 20'... Rotary solenoid, 22, 22'... Detection mechanism, 27... Cam.

Claims (1)

[Claims] 1. An index plate fixed to the center of a driven shaft connected to the drive shaft via a Geneva mechanism etc., with figure 7-shaped notch grooves provided at equal intervals on its outer periphery, and a chute and drive for feeding workpieces to the index plate. A detection mechanism that detects the direction of the workpiece held in the notch groove by being swung apart by a cam provided on the shaft, a workpiece conveyance chute provided in front of the index plate, and a conveyance chute. and drive means provided on both sides of the rod-shaped article and driven by the detection mechanism to rotate the reversing arm.