JPH0621649Y2 - Parts ejector for small parts grinder - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a component discharge device for a small component grinding machine, and more specifically, to remove a work from a pocket of a carrier disk that holds the work and sends it between the grindstones. The present invention relates to the component discharging device.

[Conventional technology]

As shown in FIGS. 1 to 3, a grinder for simultaneously grinding both end faces of a small cylindrical component has a large number of pockets for holding a work A on the outer peripheral portion of a carrier disc 2 rotating on a guide plate 1. 3 are provided at regular intervals on the same circumference, and the guide plate 1
In the recessed portion 4 of the carrier disk 2, disk-shaped grindstones 5 and 6 are arranged above and below the carrier disk 2 so that the work A held in the pocket 3 can enter between the opposing surfaces thereof. The work A, which has passed through and has both ends ground at the same time, is the guide plate 1
It is designed to be discharged from the pocket 3 at the portion of the discharge port 7 provided in the.

In the above grindstones 5 and 6, the lower grindstone 6 is the guide plate 1
While the upper grindstone 5 is horizontally arranged at the same height as the upper surface of the upper grindstone, the upper grindstone 5 is arranged in a slanted shape so that the surface facing the lower grindstone 6 is slightly wider on the carrier disk 2 side. The work A is allowed to smoothly enter between 5 and 6, and the inclination direction and the angle are set such that rough grinding is performed on the work A entering side and finish grinding is performed on the exit side. .

By the way, the work A after grinding will cause a trouble as described below unless the work A is dropped and discharged from the inside of the pocket 3 at a position immediately above the discharge port 7.

As a means for surely discharging the work A from the inside of the pocket 3, it is conceivable that the inner diameter of the pocket 3 is set sufficiently larger than the outer diameter of the work A so that the work A can be dropped and discharged smoothly. If the inner diameter of the pocket 3 is increased, the holding function for the work A deteriorates, the work A tilts during the transfer of the work A, and it becomes difficult to accurately supply the work A between the grindstones 5 and 6, and a grinding error occurs. The problem occurs.

Therefore, the inner diameter of the pocket 3 cannot be set larger than the outer diameter of the work A, and in order to reliably discharge the work A from the pocket 3 under such conditions, the discharge port 7 is Immediately above the carrier disk 2, it is necessary to install a discharge device for forcibly discharging the work A in the pocket 3.

As shown in FIG. 6a, the conventional discharging device sprays an air or a coolant onto the work A at a position on the rotation locus of the pocket 3 above the carrier disk 2 immediately above the discharge port 7 and drops it. There is a structure in which a nozzle 8 for arranging is arranged.

However, the work A is inserted into the pocket 3 of the carrier disk 2.
Is in an adhered state with the coolant liquid 9, and even if the nozzle 8 sprays air or coolant onto the work A, it is difficult to drop the work A completely due to the adhering force. In particular, a thin cylindrical work Then, since there are few action surfaces such as air blown, it becomes more difficult to drop.

If the work A does not fall completely, the work A is sandwiched between the carrier disk 2 and the guide plate 1 and deformed (FIGS. 6B and 6C), and the damaged work A is broken by the carrier disk 2 and the guide plate 1. There is a problem that it will get in the gap (Fig. 6d) and damage the carrier disk 2, the sizing device mechanism, etc., and any mistake in ejection will cause a trouble on the work supply side.

As another example of the discharging device, as shown in FIG. 7, a case 1 is attached to a fixed plate 10 arranged on a carrier disk 2.
1 is fixed, and an ascending / descending member 12 and a spring 13 for imparting descending elasticity to the ascending / descending member 12 are incorporated in the case 11,
There is a steel ball 14 fixed to the lower end of the elevating member 12 so as to project to the lower surface side of the case 11 so as to push out the work A in the pocket 3.

However, in such a discharging device, since the steel balls 14 are constantly in sliding contact with the carrier disk 2, the wear of the steel balls 14 is fast,
Since the pushing function deteriorates with time and the steel ball 14 does not completely enter the pocket 3, it is impossible to reliably drop the work A, which is the same problem as the above-described nozzle 8 type discharging device. Occurs.

The present invention has been made in view of the above points, and an object thereof is to provide an article discharging device for a small-parts grinding machine capable of reliably dropping and discharging a work from a pocket of a carrier disk. There is.

[Means for Solving the Problems]

In order to solve the above problems, the present invention holds a work in pockets provided at regular intervals on a carrier disc, and moves the work by rotation of the carrier disc to pass between grindstones. In a grinder for grinding small parts, a roller that can rotate in the direction of rotation of the carrier disk is provided on the carrier disk at a position directly above the rotation path of the pocket.
On the outer peripheral surface of the roller, projecting claws are projected at an interval equal to the arrangement of the pockets, and the claws are engaged with the carrier disk and the claws are engaged with the pockets. The roller is arranged so as to rotate, and the claw of the roller is provided with a cut surface for eliminating interference when the claw comes out of the pocket.

[Action]

When the carrier disk is rotated, the work held in the pocket is moved and sent between the upper and lower grindstones, and both end surfaces of the work are ground, the rollers whose claws engage with the pocket are driven to rotate with respect to the carrier disk, and after grinding. When the work of is held in the pocket and moved to just above the discharge port, the roller's claw is pushed into the pocket as it pushes down the work, and the fit amount of the claw becomes maximum at the lowest position of the roller. The work can be completely pushed out of the pocket and dropped into the discharge port.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5 of the accompanying drawings.

As shown in FIGS. 1 and 2, the discharge port 7 provided in the guide plate 1
Ejection device 21 arranged above the carrier disc 2 directly above
Is composed of a large number of work-extruding claws 23 projectingly provided on the outer circumference of the roller 22 with the lower part of the outer circumferential surface facing the carrier disk 2.

The claw 23 is formed in a truncated cone shape that fits in the pocket 3 and has an inclined cut surface 24 at the tip of the front half of the carrier disk 2 in the rotation direction.
Are projected on the outer peripheral surface at a pitch equal to that of the pocket 3.

The roller 22 is rotatably supported by a horizontal main shaft 26 of a support column 25 attached to a fixed portion via a bearing 27, and a rotation locus of the pocket 3 so that a lower claw 23 fits into the pocket 3 and engages with each other. Located directly above, pocket 3
The engagement of the claw 23 with the claw 23 causes the carrier disc 2 to be driven and rotated.

The discharging device of the present invention is constructed as described above, and FIGS. 4a to 4e show the lowering process in which the claw 23 pushes out and discharges the work A in the pocket 3, and FIGS. 5a to 5d show the pocket. 3 shows a process in which the claw 23 comes out of the inside of 3.

As shown in FIG. 1, both end faces are ground by passing between the grindstones 5 and 6, and the work A is held in the pockets 3 and the carrier disc 2
Is carried to the discharge port 7 by the rotation of the
The roller 22 is rotated by the rotation of the carrier disk 2 by the feeding action due to the engagement of the pocket 3 and the claw 23.

When the pocket 3 holding the work A faces the discharge port 7,
The rotating claws 23 in the descending process descend while approaching the pocket 3 and are fitted into the moving pocket 3 so that the workpiece is cut at the cutting surface 24 at the tip thereof as shown in FIGS. When A is pushed down and the claw 23 reaches the lowest position, the amount of fitting into the pocket 3 becomes maximum, and
As shown in FIG. 5e, the work can be reliably pushed out of the pocket 3 and dropped into the discharge port 7.

Since the claw 23 is formed in a truncated cone shape having a diameter slightly smaller than the inner diameter of the pocket 3, the claw 23 is fitted into the pocket 3 without interference, and as shown in FIG. The rear portion of the pocket 3 comes into contact with the claw 23 that has reached, and the roller 22 is driven and rotated by the claw 23 in the rotational direction of the carrier disk 2.

As shown in FIGS. 5A to 5D, the claw 23 that has moved to the ascending step separates from the fitted pocket 2 while rising, and then comes out of the pocket 3.
The cut surface 24 provided at the tip of the claw 23 prevents the tip of the claw 23 from interfering with the pocket 3 so that the claw 23 can be smoothly removed.

As described above, when the work A after grinding, which is held in each pocket 3 of the carrier disk 2, moves to just above the discharge port 7, the roller 2 that rotates following the carrier disk 2 is rotated.
It is forcibly pushed down by the claw 23 of 2 and the pocket 3
It will be surely dropped and discharged from inside.

〔effect〕

As described above, according to the present invention, the roller that is rotatable in the rotation direction of the carrier disc is provided at the portion located directly above the discharge port on the carrier disc where the pockets for holding the work are provided at regular intervals. , The work pushing-out claws are projected on the outer peripheral surface of the roller at the same intervals as the pockets, and the lower claws are engaged with the pockets. The work inside can be forcibly pushed out, the work inside the pocket can be reliably ejected, and troubles due to ejection errors of the work can be eliminated.

Further, the claw that fits into the pocket pushes down the work by the tip to eject it, and the roller is driven to rotate by meshing with the pocket, so the drive source may be one unit for driving the carrier disk. In addition to simplification, the claws are provided with a cut surface, so that the claws do not interfere with the pockets when coming out of the pockets, wear of the claws is small, and durability can be improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing a state of use of the discharge device according to the present invention, FIG. 2 is a horizontal cross-sectional plan view of the same, FIG. 3 is a plan view showing a grindstone portion of a grinder, and FIGS. 5A to 5D are explanatory views showing a work discharging process by the claws of the discharging device, FIGS. 5A to 5D are explanatory views showing a drawing process from the pockets of the claws, and FIG. 6A.
7A to 7D are explanatory views showing a work discharge state in the conventional discharge device, and FIG. 7 is a sectional view showing another example of the conventional discharge device. 1 ... Guide plate, 2 ... Carrier disc, 3 ... Pocket, 5, 6 ... Grinding stone, 7 ... Discharge port, 21 ... Discharge device, 22 ... Roller, 23 ... Claw.

Claims (1)

[Scope of utility model registration request] 1. A small article grinder in which a work is held by pockets provided on a carrier disc at regular intervals, and the work is moved by continuous rotation of the carrier disc to pass between grinding wheels to grind the work. Provided on the carrier disc is a roller that can be rotated in the direction of rotation of the carrier disc at a position directly above the pivoting locus of the pocket, and projecting work-extruding claws on the outer peripheral surface of the roller at the same interval as the pocket arrangement. Then, the roller is arranged so that the claw engages with the pocket with respect to the carrier disk, and the roller is rotated in the rotational direction of the carrier disk by this meshing.
A parts discharging device for a small parts grinding machine, which is provided with a cut surface that eliminates the occurrence of interference when the nail is pulled out from the pocket.