JPS6288534A - Circular workpiece conveying device - Google Patents

Abstract

PURPOSE:To make it possible to measure a workpiece on rotation, by providing workpiece rotating drums and a workpiece discharge device at the periphery of a carrier so that the workpiece may be rotated by means of the workpiece rotating drums and a pusher roller on the basis of the outer periphery of the workpiece. CONSTITUTION:A carrier 5 may be rotated about a shaft 15 within a side plate formed in a pan shape. The lower opening end of a workpiece chute 1, workpiece rotating drums 10, 11 and a discharge chute 12 are arranged successively at 90 deg. angular intervals, being opposed to the peripheral surface of the carrier 5. The workpiece rotating drums 10, 11, are driven in the directions B, C and therefore, a workpiece 2' clamped between the drums 10, 11 and a pusher roller 9 is rotated in the direction D on the basis of the outer periphery of the workpiece. The pusher roller 9 is rotatably supported to the peripheral edge of a workpiece pushing plate 8 disposed in the pan shape carrier 5. A selecting gate 20 provided at the front edge of the discharge chute 12 has gate plates 21, 22 which are opened and closed in accordance with the outer diameter of the workpiece 2' that is measured during the rotation of the workpiece drums 10, 11.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention involves sequentially feeding out a large number of works having circular cross sections, such as balls of ball bearings, rollers of roller bearings, etc. one by one, and setting them at predetermined positions. While rotating the workpiece there.

It relates to a device that performs processing or measurement and discharges to a predetermined route.

(Prior Art) FIGS. 4 to 6 show a conventional workpiece conveyance device. Reference numeral a denotes a work chute, which is formed in the shape of a trough with a U-shaped cross section, and is arranged with its tip facing downward as shown in FIG. The tip of the work chute a is closed, and the gutter opening C is positioned diagonally upward as shown in FIG. A window d is provided in a portion corresponding to the bottom of the gutter, and a plunger e can protrude through the window d. Plunger e is driven by cylinder f. Work W from the top of work chute a
is supplied, but the workpiece W rolls inside it and waits as shown in the figure. The work W at the lowest end is pushed out to the side by the plunger e by energizing the cylinder f.

g is an arm loader that reciprocates in the direction of arrow X around axis k, and is equipped with an upper jaw and a lower jaw i.

Both jaws, i, are opened and closed by cylinder j. The arm loader g grips the extruded workpiece W as described above, rotates in the direction of the arrow X, and stops at the position of the one-turn chuck Q.

A cylinder m is arranged opposite to the rotary chuck Q, and its plunger n pushes out the workpiece W on the arm loader g toward the rotary chuck Q. Of course, at this time, both jaws i are loose, and the rotary chuck a is open and stopped.

The rotary chuck Ω that receives the workpiece W clamps it and rotates to process or measure the workpiece W.

While machining or measurement is being performed, the arm loader g rotates back and repeats the first cycle. The workpiece W that has been processed or measured is dropped by releasing the rotary chuck Q.

(Problems to be Solved by the Invention) By the way, the workpiece conveyance device described above is capable of pushing the workpiece out of the workpiece chute, clamping the workpiece with the upper and lower claws, rotating the arm loader, pushing the workpiece to the rotating chuck, and pushing the workpiece with the rotating chuck. Since a large number of operations such as clamping, rotation, and return rotation of the arm loader must be performed, and these operations must be performed at good timing, the mechanism becomes complicated and the cycle time becomes longer.

(Means for Solving the Problems) In order to solve the above-mentioned drawbacks, the present invention provides a work chute that supplies circular workpieces in a row, and a receiving part that receives the workpieces that are rolled and discharged from the workchute. A cylindrical carrier that has a plurality of them arranged at equal intervals on its surface and performs intermittent rotation around its axis with a pitch of the interval, and a work rotation drum and a work discharge that are sequentially arranged around the carrier. an intermittent motion mechanism that rotates the carrier intermittently; and a pressing roller that works in conjunction with the intermittent motion mechanism to periodically press the workpiece from the receiving section toward the workpiece rotation drum at the intermittent cycle. The workpiece rotation drum rotates the workpiece based on the outer circumference by the workpiece rotation drum and the pressing roller, and the workpiece is measured or processed while the workpiece is being rotated.

(Function) The carrier, which is intermittently driven by a continuously rotating drive source via an intermittent motion mechanism, receives the workpieces one by one from the workpiece chute into its receiving portion and sequentially conveys them to the workpiece rotation drum and the workpiece discharge portion. Then, the workpiece that has reached the position of the workpiece rotation drum is pushed out from the receiving portion by a roller, pressed against the workpiece rotation drum, and rotated based on the outer circumference of the workpiece rotation drum. Measurement or processing is performed during this rotation. The above three steps of transferring the workpieces one by one to the carrier, transporting the workpieces to the workpiece rotating drum position, and carrying them out from the position are all performed only by the intermittent rotation of the carrier.

(Example) Figures 1 to 3 show embodiments of the present invention.

Reference numeral 1 denotes a workpiece chute, from which a workpiece 2 is sent out by its own weight from its lower open end.

Reference numeral 3 denotes a Geneva drive plate which is continuously rotated at a constant speed in the direction of arrow A by a drive shaft 13, and includes a drive pin 3a and an arcuate surface 3.
b. 4 is the shaft 1 fixed to the frame 14
A Geneva gear rotatably supported by 5,
It includes radial slits 4a provided every 90 degrees and four arcuate surfaces 4b located between them.

The Geneva drive plate 3 and the Geneva gear 4 mesh with each other to form a Geneva mechanism (in FIG. 2, only the Geneva mechanism is shown).
The Geneva drive plate 3 is shown advanced by 90 degrees. ). The Geneva gear 4 is integrally connected to the carrier 5 at mutual boss portions. The carrier 5 is formed into a dish shape and can be rotated around a shaft 15 within side plates 16 and 17, and its peripheral surface is provided with the open lower end of the work chute 1 and the work rotary drum 10.1.
1 and a discharge chute 12 are arranged facing each other in sequence at an interval of 90 degrees. The carrier 5 is provided with four receiving parts 5a to 5d at intervals of 90 degrees. Each receiving part 5a to 5d is a workpiece 2.
It consists of a U-shaped notch with a width and depth slightly larger than the diameter of the . Work rotating drum 10.11 is arrow B
, C direction, and rotates the workpiece 2' held between the pressing roller 9 in the direction of the arrow with reference to the outer circumference. The pressing roller 9 is rotatably supported on the periphery of a workpiece pressing plate 8 disposed within the dish-shaped carrier 5, as shown in FIG.

The workpiece pressing plate 8 has a long hole 8a provided therein, and the carrier 5 is inserted into the long hole 8a.
By loosely fitting the boss 5e, it is possible to reciprocate in the direction of arrow E, but rotation is prevented by loosely fitting a pin 18 protruding from the side plate 17 into a separately provided elongated hole 8b. The workpiece pressing plate 8 is equipped with a cam follower 7, which is in contact with the circumferential surface of the cam 6 fixed to the drive shaft 13. A biasing force for this contact is provided by a spring (not shown). The drive shaft 13 is continuously driven by a motor 19 attached to the frame 14 via a reduction gear. A sorting gate 20 is provided at the tip of the discharge chute 12. The sorting gate 20 includes gate plates 21 and 22 that open and close according to the outer diameter of the work 2' measured during rotation by the work rotation drum 10.11, and sorts the discharged work 2# into three ranks.

Next, the operation of the device will be explained. When the motor 19 continuously rotates the shaft 13, the Geneva drive plate 3 rotates in the direction of the arrow from the position shown in FIG.
into the slit 4a to drive the Geneva gear 4 in the direction of arrow F.

Prior to this, the cam follower 7 falls due to the rotation of the cam 6, and the workpiece pressing plate 8 moves in the opposite direction of arrow E, so that the pressing roller 9 is separated from the workpiece 2'. Therefore, the workpiece 2' is sunk to the bottom of the receiving portion 5b of the carrier 5. Also.

The arcuate surface 3b of the Geneva drive plate 3 is the arcuate surface 4 of the Geneva gear 4.
It is passing b. As a result, the Geneva gear 4 rotates by 90 degrees in the direction of arrow F, and the arcuate surface 3 reconnects at that position.
b and 4b, it is stopped at the rotational position. Due to the rotation of the Geneva gear 4, the carrier 5, which rotates together with the Geneva gear 4, moves the receiving part 5b, which was located at the work rotating drum 10.11, to the position of the discharge chute 12 together with the work 2', and removes it as the discharge work 2'. is sent to the sorting gate 20. At the same time, the receiving part 5a, which is located at the open lower end of the work chute 1 and has received the work 2, moves the work 2 to the position of the work rotation drum 10.11. During this operation, the peripheral surface of the carrier 5 prevents the work 2 from moving out of the work chute 1.

During the above operation, the pressing roller 9 is retreating, so
Sending out work 2' and receiving work 2 are not obstructed. Further, the receiving portion 5d moves to become a new receiving portion 5a, and receives the next work 2. After the rotation of the carrier 5 has stopped, the cam 6 pushes out the workpiece pressing plate 8 in the direction of the arrow E, so a new workpiece 2' is pushed out from the receiving part 5b and pressed against the workpiece rotating drum 10.11. They rotate it in the direction of the arrow. During this rotation, the outer diameter, roundness, etc. of the workpiece 2' are measured and stored. The gate plates 21 and 22 of the sorting gate 20 are opened and closed based on this measured value. When the measured value is within the specified range, the gate plate 21 is in the closed position shown by the solid line, and the discharged work 21 is classified as an acceptable product. If the measured value is smaller than the specified range, the gate plate 21 is opened, the gate plate 22 assumes the closed position indicated by the chain line, and the discharged workpiece 2' is classified as a negative rejected product.

If the measured value is larger than the specified range, both gate plates 21.
22 are opened together, and the discharged workpieces 2' are separated as positive rejects.

The above operations are performed during continuous rotation of the drive shaft 13, and when the drive pin 3a returns to the position shown in FIG. 1, the next cycle starts again and is repeated thereafter.

(Effects) As described above, in the present invention, the three steps of feeding out the workpieces one by one from the workpiece chute, transporting the workpieces to the measurement or processing position, and carrying them out from there are performed by intermittent rotation of the carrier. Since the rotation of the workpiece at the measuring or processing position is carried out based on the outer periphery by the workpiece rotation drum placed at that position and the pressing roller that operates intermittently, This is possible with an extremely simple configuration, and there is no risk of interlocking errors or timing shifts. Furthermore, since each process is performed in parallel, cycle time can be shortened.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line -■ in FIG. 1, and FIG. 3 is a plan view of a workpiece pressing plate. Fig. 4 is a front view of the conventional example, Fig. 5 is a sectional view showing the v-■ cross section of Fig. 4, and Fig. 6 is a VI-V of Fig. 4.
It is a sectional view showing an I section. 1... Work chute 2... Work 3...
Geneva drive plate 4... Geneva gear 5... Carrier 5a-5d... Receiving part 6... Cam
8...Work pressing plate 9...Work pressing rollers 10, 11...Work rotating drum 12...Discharge chute

Claims (1)

[Claims] A work chute for supplying circular workpieces in a line, and a plurality of receiving parts for receiving the workpieces rolled and discharged from the workchute are provided on the circumferential surface thereof at equal intervals, and the said interval is provided around the axis of the work chute. A cylindrical carrier that performs intermittent rotation as a pitch, a work rotation drum and a work discharge part that are sequentially arranged around the carrier, an intermittent movement mechanism that intermittently rotates the carrier, and a movement mechanism that interlocks with the intermittent movement mechanism. and a pressing roller that periodically presses the workpiece from the receiving portion toward the workpiece rotating drum at the intermittent period, and the workpiece rotating drum rotates the workpiece based on the outer circumference by the pressurizing roller and the pressing roller. A conveyance device for a circular workpiece, characterized in that measurement or processing is performed on a rotating workpiece.