JPS64263Y2 - - Google Patents

Description

[Detailed explanation of the idea]

B. Field of industrial application This invention relates to a parts feeding device. When feeding various parts (hereinafter referred to as workpieces) one by one to a processing position, for example, a bearing ring, etc. It is used when supplying circular workpieces. B. Conventional technology Conventionally, a component supply device has a plurality of work pockets arranged at equal positions in the circumferential direction, and supplies the work in the work pockets to a processing position, etc. using a carrier plate that is driven to rotate around a vertical axis. is well known. As a method for supplying workpieces to the workpiece pockets of the carrier plate, the most commonly used method has conventionally been to feed a large number of workpieces stacked in a row in a magazine sequentially from the bottom end using the weight of the workpieces. C. Problems to be solved by the invention In the above conventional method, the time t required to feed the workpiece from the magazine into the workpiece pocket of the carrier plate is calculated as follows: where h is the head of the workpiece and g is the gravitational acceleration ,theoretically

It is represented by [Formula]. Therefore, the circumferential speed of the carrier plate is limited to the above-mentioned time t, and there is a problem that the speed cannot be increased any further. In particular, the falling time t due to the workpiece's own weight is slower than in the above equation because of frictional resistance and air resistance within the magazine. In addition, when processing or assembling a workpiece with a workpiece in the workpiece pocket of the carrier plate,
Since it is necessary to minimize variations in the positional accuracy and inclination of the workpiece, the pocket clearance must be made smaller, which further slows down the workpiece supply time. For example, if the work pocket provided in the carrier plate has a notched groove shape that opens toward the periphery, it is possible to quickly feed the work from the radial direction of the carrier plate. It is not possible to guide the positioning from the entire circumference, resulting in variations in positional accuracy, and the workpiece moves during machining, making high-precision machining difficult. Therefore, in order to reduce variations in positional accuracy and perform high-precision machining, it is better to use a circular pocket or the like that can position and guide the workpiece from the entire circumference. It is necessary to feed from a direction parallel to the rotational axis of the carrier plate, which causes the problem described above. In addition, in order to perform highly efficient and highly accurate machining, it is better to continuously rotate the carrier plate, but in this case, the time during which the workpiece pocket of the carrier plate communicates with the magazine is shortened, resulting in insufficient workpiece supply. There was a definite problem. D. Means for solving the problem This invention has a plurality of work pockets at equal positions in the circumferential direction, and is driven to rotate around a vertical axis.
A carrier plate that supplies the workpieces in the workpocket to a processing position, etc., and the carrier plate is arranged on the circumferential line of the workpocket, and accommodates a large number of workpieces stacked in a row, sequentially starting from the lowest workpiece. It consists of a magazine that supplies workpieces to workpiece pockets, and a weight is placed on the top of a large number of works stored in the magazine via a spring, and the spring is placed between the top of the large number of workpieces and the weight. is compressed, the spring stores a downward force to accelerate the falling speed when the workpiece is supplied, and the elastic force of the spring is applied as a downward acceleration when the workpiece is supplied to the magazine. may be supported so as to be able to follow the rotation direction of the carrier plate by a predetermined distance. E. Effect This invention deals with the fact that the free fall time of the workpiece is slowed down by frictional resistance and air resistance inside the magazine, and uses a weight that is heavy enough to overcome these factors, thereby increasing the feeding time of the workpiece. In order to bring the workpiece closer to the theoretical free fall time and to cause the workpiece to fall even faster than the theoretical free fall time, the acceleration α due to the elastic force of the spring is added to the gravitational acceleration g to reduce the feeding time of the workpiece.

[Formula] F. Embodiment FIG. 1 is an explanatory diagram of the principle of the device of the present invention, in which 1 is a workbench, 2 is a carrier plate rotatably supported on the workbench 1 via a vertical shaft 3;
4 is a work pocket formed at equal positions in the circumferential direction of the carrier plate 2, 5 is a magazine, and 6 is a magazine 5.
A large number of workpieces are stacked in a row, and numeral 7 indicates a weight placed on top of the workpieces 6 via a spring 8. The carrier plate 2 is continuously driven to rotate in a fixed direction by a drive device (not shown) such as a motor, and the magazine 5 is arranged at a predetermined position on the carrier plate 2. Then, as the carrier plate 2 rotates, the lowermost works 6 of the magazine 5 are sequentially supplied into the work pocket 4 which has reached a position directly below the magazine 5. Now, if we use a weight 7 that is heavy enough to overcome the frictional resistance, air resistance, etc. of the workpiece 6 in the magazine 5, the time t for the workpiece 6 at the bottom of the magazine 5 to freely fall will be determined by its head, h, and the gravity. If the acceleration is g,

[Formula], and since the acceleration α obtained by the elastic force of the spring 8 is added to this, the feeding time of the workpiece 6 by this device is

[Formula] becomes. Incidentally, the acceleration α obtained from the elastic force of the spring 8 can be obtained as α=F/m from the law of motion F=mα, where the mass of the workpiece 6 is m and the spring force of the spring 8 is F. Therefore, the larger the spring force F is, the faster the supply time t of the workpiece 6 in this device can be.
If the circumferential speed of the carrier plate 2 is given by the conditions on the processing machine side, it is sufficient to set the spring force F to match it. 2 and 3 show a specific application example in which the device of the present invention is applied to a double-headed surface grinder, in which the carrier plate 2 is attached to the vertical shaft 3 of the workbench 1 via the mounting board 2a, The magazine 5 is removably suspended from an arm 10 that is supported coaxially with the carrier plate 2 via bearings 9, 9 on the vertical shaft 3. That is, a stand rod 11 is provided on the arm 10 in parallel with the vertical axis 3, a support plate 12 is fixed to the upper end of the stand rod 11, and the upper end of the magazine 5 is inserted into the support hole 13 formed in the support plate 12. Locking part 5
a is locked. The magazine 5 is made of a round bar, and its upper end locking portion 5a has a larger diameter than the support hole 13.
A narrow neck portion having a diameter slightly smaller than that of the support hole 13 is provided in the center of this large diameter portion. Support hole 13 of support plate 12
has a slit opening on one side, and the narrow neck portion of the upper end locking portion 5a of the magazine 5 is inserted into the support hole 13 through the slit opening to lock the magazine 5 in the support hole 13. A lower guide plate 14 is integrally attached to the arm 10.
A work supply guide 15 is attached to the tip of 4. This work supply guide 15 is connected to the magazine 5
The lowermost workpiece 6 is accurately guided and fed into the workpiece pocket 4 of the carrier plate 2. The arm 10 is normally held stationary in position relative to the rotating carrier plate 2. For this purpose, a fixing plate 16 attached to a part of the workbench 1 is arranged on the upper part of the carrier plate 2, and a latching pin is provided upright on the fixing plate 16 and on the lower guide plate 14 integrated with the arm 10. A return spring 19 is tensioned between 17 and 18, and the return spring 19 pulls the arm 10 in a direction opposite to the rotating direction of the carrier plate 2, so that it comes into contact with a stopper 20 provided on the fixed plate 16. and held in place. The above-mentioned stopper 20 is in the form of an adjustment screw,
The resting position of the arm 10 can be finely adjusted.
A large number of workpieces 6 are inserted into the magazine 5 in a stacked state in a row, and the uppermost workpiece 6 has a feed plate 2.
A spring 8 and a weight 7 are mounted via 1. That is, the spring 8 is compressed between the uppermost workpiece 6 and the weight 7, and the force for accelerating the falling speed is stored as stored elasticity. As a result, the works 6 in the magazine 5 are supplied into the work pockets 4 of the rotating carrier plate 2 in order from the lowest one. The workpiece 6 is fed into the workpiece pocket 4 under the condition that the arm 10 is held stationary in a fixed position. Although the weight has been determined, if for some reason the workpiece 6 is not fully supplied to the workpiece pocket 4 at the fixed position of the arm 10, the entire magazine 5 is integrated with the arm 10 and transferred to the carrier plate 2. The magazine 5 is rotated a predetermined distance against the return spring 19 in the direction of rotation of the arm 10, and when the supply of the workpiece 6 into the workpiece pocket 4 is completed, the magazine 5 and the arm 10 are fixed by the return spring 19. It is automatically returned to the position, and the supply of the workpiece 6 is continued. However, if the supply of the workpiece 6 into the workpiece pocket 4 is not completed while the magazine 5 and the arm 10 are following along with the carrier plate 2 by a predetermined distance and the workpiece 6 remains incompletely supplied, the device must be brought to an emergency stop. It is made to be obtained. For this purpose, a detector 22 is installed at a predetermined position in front of the arm 10 in the following rotation direction. This detector 22 is mounted on the fixed plate 16 via a support plate 23, and although a non-contact proximity switch is used in this embodiment, other types of detectors such as limit switches may also be used. Good too. The workpiece 6 supplied from the magazine 5 into the workpiece pocket 4 is carried between the rotary grindstones 24, 24 of the double-headed surface grinder by the rotation of the carrier plate 2, and both upper and lower end surfaces are cut by the rotary grindstones 24, 24. to be ground. The work 6 after grinding is discharged from the work pocket 4 of the carrier plate 2 by a suitable discharge device (not shown). Work 6 of this example
is an annular component (for example, a bearing raceway) having a through hole, but is not limited to this. Effects of the invention According to this invention, the feeding time of the workpiece into the workpiece pocket of the carrier plate can be speeded up by using the elastic force of the compressed spring without being restricted by the free fall time. Work efficiency can be improved by continuously rotating the plate. Moreover, since the structure is very simple, it can be provided at low cost.

[Brief explanation of the drawing]

Fig. 1 is a diagram explaining the principle of the device of the present invention, Fig. 2 is a vertical cross-sectional side view showing a specific example of application of the device of the present invention, and Fig. 3
The figure is a cross-sectional plan view thereof. 2...Carrier plate, 3...Vertical axis, 4...Work pocket, 5...Magazine, 6...Work, 7
...Weight, 8...Spring.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A carrier plate that has a plurality of work pockets arranged at equal positions in the circumferential direction, is driven to rotate around a vertical axis, and supplies the workpieces in the work pockets to a processing position, etc.; It consists of a magazine that is arranged on the circumference of the work pockets of the carrier plate, stores a large number of work pieces stacked in a row, and supplies the work pieces to the work pockets sequentially from the lowest work piece by its own weight. , A weight is placed via a spring on the topmost workpiece of the large number of workpieces stored in the magazine, and the spring is compressed between the topmost workpiece of the large number of works and the weight, and the spring is compressed between the topmost workpiece and the weight. A parts feeding device characterized in that a downward force is applied to increase the falling speed when a workpiece is fed and falls. (2) A parts supply device, characterized in that the magazine according to claim 1 is supported so as to be able to follow the rotational direction of the carrier plate by a predetermined distance.