JPH0753990Y2 - Work rotation device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a work, such as a device for rotating a rod-like work placed on a conveyor of an automatic assembly device by 180 ° and placing it again on the conveyor. The present invention relates to a work rotating device that rotates a workpiece by a predetermined angle.

[Prior art and its problems]

For example, in an automatic assembling process for a double-headed writing instrument in which pen bodies are attached to both ends of a shaft cylinder, a rod-shaped shaft cylinder (work) having openings at both ends is placed on a conveyor that advances intermittently, and the first pen body The pen body is fitted in one opening of the barrel at the fitting station, and the pen body is fitted in the other opening at the next second pen fitting station. Because it is placed on one side of the conveyor for reasons such as, after fitting the pen body in one opening,
It is necessary to rotate the barrel 180 °.

For this reason, in the work rotating device arranged above the conveyor, the chuck attached to the tip of the operating shaft grips the shaft cylinder on the conveyor to move up, rotates 180 °, and then descends to be placed on the conveyor again. Place. Therefore, a drive mechanism for reciprocating the operating shaft and a drive mechanism for rotating the operating shaft are required, and the structure is complicated, and since the operating shaft moves up, then rotates, and then descends, it becomes three-motion.
The operation time was long, which was an obstacle to cycle up.

[Purpose of device]

Therefore, an object of the present invention is to provide a work rotating device that does not require a driving mechanism for rotation, has a simple structure, and has a short operating time.

[Constitution of the device and its action]

In the work rotating device of the present invention, the linear portion in the axial direction at both ends and the inclined portion in the middle are defined as one unit groove on the outer circumference of the operating shaft having a chuck for gripping the work at the tip.
This unit groove is connected by a groove connecting them to form a continuous cam groove around the entire circumference of the operating shaft, and the fixed cam follower pin engages with the cam groove and is driven by a drive mechanism such as an air cylinder. The operating shaft moves back and forth to reciprocate, and at the same time, rotates in a fixed direction by a predetermined angle.

In such a work rotating device, a linear cam portion at both ends and a slanted portion in the middle thereof are defined as one unit groove on the outer periphery of the operating shaft, and the unit groove is formed with a continuous cam groove over the entire periphery of the operating shaft. Since the follower pin is engaged with this cam groove, when the operating shaft is axially driven and reciprocates, the chuck attached to the tip of the operating shaft is
It reciprocates while rotating in a certain direction. That is, the work can be reciprocated while rotating. Therefore, the drive mechanism for rotation is not required, the structure is simplified, and the reciprocating motion and the rotating motion are simultaneously performed, so that two-motion is performed and the operation time is shortened. There is also an advantage that the rotation angle and the change in rotation speed can be freely set by appropriately setting the angle and shape of the cam groove.

〔Example〕

The present invention will be described in detail below with reference to the embodiments shown in the drawings.

FIG. 1 shows a work rotating device used for automatically assembling a double-headed writing instrument. In FIG. 1, a shaft cylinder W, which is a work, is placed on a conveyor 30 which is composed of two parallel moving members and moves intermittently. The substrate 20 is arranged above the conveyor 30, and the air cylinder 21 is mounted on the substrate 20. Piston rod of air cylinder 21
24 is fixed to the movable plate 23, and two guide rods 22 also fixed to the movable plate 23 are inserted into the substrate 20. The operating shaft 11 is fixed to the movable plate 23 via the rotary joint 15, and the operating shaft 11 is rotatable about the axis. The operating shaft 11 is inserted into a pin holder 16, and a chuck 12 for holding the shaft cylinder W is attached to the tip of the pin holder 16.

Here, a cam groove 13 is formed on the outer circumference of the operating shaft 11. Then, as shown in FIG. 3, the fixed cam follower pin 14 fixed to the pin holder 16 is engaged with the cam groove 13. As shown in the developed view of FIG. 2, the cam groove 13 has a linear portion in the axial direction and an inclined portion in the middle thereof as one unit groove, that is, in FIG. 2, it is an end portion of the upper linear portion. A unit groove is a cam groove between A and B which is an end of the lower linear portion, and a unit groove is a cam groove between C which is an end of the upper linear portion and D which is an end of the lower linear portion. age,
The two unit grooves are connected by a groove connecting them, and are continuous over the entire circumference of the operating shaft 11. Therefore, the distance between A and C at the upper end and B and D at the lower end is 360 ° divided by the number of unit grooves.
It has become °. Therefore, when the air cylinder 21 operates and the operating shaft 11 repeats reciprocating motion, the position of the fixed cam follower pin 14 moves in the order of A → B → C → D → A. In other words, the chuck 12 at the tip of the operating shaft 11 moves 180
° Rotate. The rotation angle of the chuck 12 for each reciprocation can be freely set by changing the angle of the inclined portion of the cam groove 13, and for example, the work W can be rotated by 90 °.

Then, the chuck 12 grips the shaft cylinder W having the pen body fitted in one opening and ascends from the conveyor 30 and then descends. At this time, the position of the fixed cam follower pin 14 is B → C. The chuck 12 is rotated 180 ° by moving in the order of → D. Therefore, the shaft cylinder W rotates 180 ° and is placed on the conveyor 30 again.

In this way, since the actuating shaft 11 is rotated by the cam groove 13 and the fixed cam follower pin 14, a drive mechanism for rotation is unnecessary, and the structure is extremely simple. And the operating axis
Since 11 reciprocating motions and rotating motions are performed at the same time, the operating time is shortened and the cycle can be increased.

Obviously, the operating shaft 11 may be horizontally reciprocated.

[Effect of device]

As explained above, in the work rotating device of the present invention, the linear portion in the axial direction of both ends and the inclined portion in the middle are set as one unit groove on the outer periphery of the operating shaft having the chuck for holding the work attached to the tip thereof. This unit groove is connected by the connecting groove to form a continuous cam groove around the entire circumference of the operating shaft, so that the fixed cam follower pin engages with this cam groove. Driven by the mechanism, the operating shaft does not rotate in a predetermined direction by a predetermined angle, but reciprocates. Therefore, the drive mechanism for rotating the actuating shaft is not required, the structure is extremely simple, and the work rotating device can be operated in a short time.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a developed view of an operating shaft, and FIG. 3 is an explanatory view of a cam follower pin and a cam groove. 11 …… Operating axis, 12 …… Chuck, 13 …… Cam groove 14 …… Fixed cam follower pin, 20 …… Substrate 21 …… Air cylinder, 30 …… Conveyor

Claims (1)

[Scope of utility model registration request] 1. A unit groove is provided on the outer periphery of an operating shaft having a chuck for gripping a work at its tip, and a linear portion in the axial direction at both ends and an inclined portion in the middle thereof are defined as one unit groove, and the unit groove connects the grooves. And a fixed cam follower pin engages with the cam groove and is driven by a drive mechanism such as an air cylinder to move the operating shaft forward and backward. As they make a round trip
A work rotating device, which rotates in a constant direction by a predetermined angle.