JPH0751233Y2 - Positioning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a positioning device for parts.

[Problems to be Solved by Conventional Techniques and Inventions] A component in which a resin-made inner cylinder is fitted inside a cylindrical outer cylinder made of metal, and unevenness is provided on a mating surface of the outer cylinder and the inner cylinder. In order to transmit rotation, the parts that have long holes that are parallel to the axial direction through the side surface of the inner cylinder cannot be distinguished from the external appearance, so it is difficult to perform the assembly work conventionally. At that time, it was impossible to automate the work of arranging the individual parts in a certain direction by utilizing the outer shape.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the present invention provides a positioning device for parts, which is formed by fitting an outer cylinder and an inner cylinder slidably in the axial direction and forming an elongated hole in the side surface of the inner cylinder in the axial direction as follows. Configured. That is, a pusher that pushes up the inner cylinder by a predetermined amount, a rotation shaft into which the pushed up inner cylinder is fitted with a projection that hangs in an elongated hole in the inner cylinder on the side surface, and the pushed up inner cylinder is rotatably held from the side surface. A lever, a detector for detecting the elongated hole, a control device for stopping the rotation of the rotary shaft when the detector detects the elongated hole, and the upper cylinder of the inner cylinder is pushed down into the outer cylinder. The positioning device was composed of the pushing rod and the returning rod.

[Action]

When the parts are stored in the index table or the like and conveyed to the positioning device, the pusher pushes up the inner cylinder to fit it into the rotary shaft. The inner cylinder is held vertically by a lever, and when the rotary shaft rotates, the protrusion on the side surface engages with the elongated hole of the inner cylinder to rotate the inner cylinder together with the outer cylinder. When the detector detects the long hole, the rotation stops and the push rod pushes down the inner cylinder and returns it into the outer cylinder. As a result, even a component whose appearance cannot be obtained can be reliably positioned toward a predetermined position with the elongated hole of the inner cylinder as a reference.

〔Example〕

An embodiment of the positioning device according to the present invention will be described below with reference to the drawings.

The positioning device is shown in FIGS. 1 and 2. In the positioning device 1, the rotary shaft 2 is arranged on the upper side and the pusher 4 is arranged on the same line on the lower side, and the parts 8 housed in the index table 6 are fed between them. Part 8
As shown in FIG. 3 and FIG. 4, a resin inner cylinder 12 is fitted inside a metal outer cylinder 10, and recesses 14 are evenly formed at four locations on the inner surface of the outer cylinder 10. Corresponding to the concave portion 14, a convex portion 16 is formed on the outer surface of the inner cylinder 12. A gap a is provided between the concave portion 14 and the convex portion 16, the outer cylinder 10 and the inner cylinder 12 are slidable in the axial direction, and the side surface of the inner cylinder 12 has inner and outer portions at the top of the convex portion 16. An elongated hole 18 is formed therethrough. Rotating shaft 2
Has a diameter smaller than the inner diameter of the inner cylinder 12 and is connected to a motor 26 supported by a frame 24 by two bearings 22 and installed above. As shown in FIG. 5, a hole 28 is provided in the lower end of the rotary shaft 2 in the diametrical direction. The sphere 20 is housed inside the hole 28 in a state of being biased by a spring 30, and the inner cylinder 12 is fitted therein. Then, the sphere 20 projects from the side surface of the rotating shaft 4 so that the sphere 20 comes into contact with the inner surface of the sphere 20 and is retracted. Spring 30
Is set to a spring force that does not cause an impression or a scratch on the inner surface of the inner cylinder 12 when the sphere 20 moves inside the inner cylinder 12.
The pusher 4 is thinner than the inner diameter of the outer cylinder 10 of the component 8 and thicker than the inner diameter of the inner cylinder 12, and is a cylinder installed below.
32 is connected to the inner cylinder 12 so that the inner cylinder 12 does not completely come out of the outer cylinder 10, and the elongated hole 18 of the inner cylinder 12 is a sphere of the rotary shaft 2.
Ascend to the position where 20 is engaged. Further, levers 36 rotatably supported in the horizontal direction by pins 34 are provided on both sides of the rotary shaft 2 near the lower end of the rotary shaft 2, and springs 38 attached to the levers 36 pull the levers 36 in the closing direction. Has been done. Below the lever 36, a plate cam with a thin tip is formed.
A tip 40 is connected to the cylinder 42 with its tip facing the middle of the lever 36, and when the cylinder 42 operates and rises, the lever 36 is opened and expanded left and right. A push rod 44 is installed adjacent to the rotary shaft 2 by a cylinder 46 so as to move vertically along the rotary shaft 2 and between the levers 36. Further, between the levers 36, detectors 48 are installed on the sides of the elongated holes 18 of the inner cylinder 12 that have been pushed up. The part 8
Are stored in the index table 6 and are conveyed between the rotary shaft 2 and the pusher 4 as described above. As shown in FIG. 6, a jig 54 for urging the sphere 50 toward the inside by a spring 52 is provided in the parts storage part of the index table 6 so that the parts 8 can be easily removed in the axial direction. Instead, it is held rotatably in the circumferential direction.

Next, the operation of the positioning device 1 will be described. When the parts 8 are conveyed to the upper part of the pusher 4 by the index table 6, the cylinder 32 operates and the pusher 4 is moved.
However, the inner cylinder 12 is pushed up until it fits into the rotary shaft 2. At this time, the outer cylinder 10 is held by the jig 54 and does not move. The inner cylinder 12 compresses the spring 30 of the rotary shaft 2 to move the spherical body 20 backward, and at the same time, receives the spring force and is inclined obliquely. Next, when the cylinder 42 operates and the plate cam 40 retreats, the lever 36 is closed, and the inner cylinder 12 is sandwiched and held vertically. When the rotary shaft 2 is rotated by the motor 26, the spherical body 20 moves while sliding on the inner surface of the inner cylinder 12. When the spherical body 20 reaches the elongated hole 18, the spherical body 20 enters into the elongated hole 18 and is engaged therewith, and the inner cylinder 12 is rotated together with the outer cylinder 10. When the elongated hole 18 reaches the front surface of the detector 48 as it rotates, the detector 48 senses it and sends a signal to the controller (not shown) to stop the rotation of the rotary shaft 2. The cylinder 46 is operated to lower the push rod 44 to push the inner cylinder 12 into the outer cylinder 10, raise the plate cam 40, and open the lever 36.

Therefore, even if the component 8 has a cylindrical outer shape and a characteristic cannot be obtained from the outer appearance, the inner cylinder 12 is made to protrude from the outer cylinder 10
By rotating using the oblong hole 18 in 12 to detect the state in which the oblong hole 18 faces the detector 48, it is possible to reliably position the component 8 in the index table 6 in a fixed direction. be able to.

By increasing the number of the spherical bodies 20, the engagement with the elongated holes 18 can be accelerated, the rotation amount of the rotary shaft 2 can be reduced, and the detection can be speeded up. Although the outer cylinder 10 is made of metal and the inner cylinder 12 is made of resin in the above embodiment, the present invention is not limited to this.

[Effect of device]

According to the positioning device of the present invention, the pusher that pushes up the inner cylinder, the rotation shaft into which the pushed up inner cylinder is fitted with the protrusion that engages with the elongated hole provided in the inner cylinder on the side surface, and the pushed up inner cylinder are provided. A lever that rotatably holds the side surface, a detector that detects the elongated hole, a controller that stops the rotation of the rotating shaft when the detector detects the elongated hole, and the upper surface of the inner cylinder is pushed down and pushed up. Since the positioning device is composed of the push rod that returns the inner cylinder into the outer cylinder, the outer cylinder and the inner cylinder are slidably fitted in the axial direction, and the elongated hole is formed in the side surface of the inner cylinder in the axial direction. With respect to the component, the rotation position can always be accurately and surely positioned by making the inner cylinder project from the outer cylinder and using the elongated hole regardless of its appearance.

[Brief description of drawings]

FIG. 1 is a front view of a positioning device according to the present invention, FIG. 2 is a side view of the positioning device according to FIG. 1, FIG. 3 is a plan view of a component, and FIG. 4 is a side view of a component. FIG. 5 is a sectional view of the rotary shaft, and FIG. 6 is a partial side view of the index table. In the drawings, 1 ... Positioning device, 2 ... Rotation axis, 4 ... Pusher, 6 ... Index table, 8 ... Parts, 10 ... Outer cylinder, 12 ... Inner cylinder,
14 ... concave part, 16 ... convex part, 18 ... elongated hole, 20 ... sphere, 36 ... lever, 40 ... plate cam, 44 ... push rod, 48 ... detector, 54 ... jig.

Claims (1)

[Scope of utility model registration request] 1. A positioning device for a component, wherein an outer cylinder and an inner cylinder are slidably fitted in an axial direction, and an elongated hole is formed in the side surface of the inner cylinder in the axial direction. The inner cylinder is pushed up by a predetermined amount. Detects the pusher, a rotation shaft that has a protrusion that hangs in an elongated hole in the inner cylinder on the side surface, and the inner cylinder that is pushed up fits in, a lever that rotatably holds the pushed inner cylinder from the side surface, and the elongated hole A positioning device including a detector for controlling the rotation of the rotary shaft when the detector detects an elongated hole, and a push rod that pushes down the upper surface of the inner cylinder and returns the inner cylinder that has been pushed up into the outer cylinder. .