JP2564814B2 - Cylindrical article supply device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical article for supplying a cylindrical article having a cross-sectional center and a center of gravity to a device such as a pin press-fitting machine in a predetermined posture. The present invention relates to a supply device.

2. Description of the Related Art As a conventional device of this type, only a spring pin 1 (see FIG. 6) having a slit formed on the outer periphery of a cylindrical shape and having a slit 1a of the spring pin 1 facing downward is selected. A bowl type parts feeder for supplying to a pin press-fitting machine or the like (not shown) is known.

As shown in FIG. 7 to FIG. 9, this bowl type parts feeder 2 has a spiral bowl 2b formed in a circular bowl main body 2a in a left-handed manner so that the spiral slope 2b gradually becomes higher toward the outside. A supply gutter 3 is tangentially provided on the uppermost portion of the spiral slope 2b.

Also, the uppermost side of the slope 2b and the supply gutter 3
Is formed with a guide ridge 4 which vertically projects from the floor surface. The guide ridge 4 has substantially the same radius as the radius of the spring pin 1 and the side wall 2C on the outer peripheral side from the spring pin 2. It is formed at a position separated by almost the same distance as the radius of 1.

Then, the large number of spring pins 1 accommodated in the bowl type parts feeder 2 move in the peripheral direction of the bowl body 2a by the rotational movement accompanied by the vibration of the bowl body 2a,
On the slope 2b, it progresses counterclockwise in FIG. 8, gradually climbs the spirally formed slope 2b to the higher side, and advances to the uppermost part of the slope 2b to form the guide protrusion 4. Reach where you are. For the spring pin 1 that has reached the position where the guide protrusion 4 is formed, only the slit 1a formed in the spring pin 1 faces directly below, and this slit 1a fits into the guide protrusion 4. When the slit 1a of the spring pin 1 does not face directly below, that is, the spring pin 1 in which the slit 1a does not fit into the guide protrusion 4 is moved. Rides on the guide ridge 4 as shown by the chain double-dashed line in FIG. 9, and as a result, it rolls down inside the bowl body 2b due to vibration,
You will be climbing slope 2b again.

Therefore, from the bowl main body 2a, only the spring pin 1 in which the slit 1a is fitted in the guide protrusion 4, that is, the spring pin 1 in which the slit 1a faces directly below is supplied to the pin press-fitting machine or the like via the supply trough 3. It is being supplied.

Problems to be Solved by the Invention However, the conventional bowl type parts feeder 2 described above is used.
Is not provided with a mechanism for positively correcting the attitude of the spring pin 1, and the spring pin 1 accidentally supplies only the desired attitude, that is, the attitude in which the slit 1a faces downward. Therefore, there was a problem that the efficiency was low. Further, in the case of a spring pin having a small diameter, the width of the slit becomes relatively narrow, which makes it difficult to manufacture the guide ridge, and it is difficult to insert the guide ridge into the narrow slit.

Further, as a device of this type having a mechanism for correcting the posture of an object to be supplied, there is a notch ring alignment device described in Japanese Utility Model Laid-Open No. 58-23819. This is a device that aligns a ring having a cutout portion by correcting the posture so that the cutout portion of this ring is on the top, and arranging a screw conveyor circuit-driven by a motor in the transport path of the cutout ring, When the cutout ring is fitted on the outer periphery of the screw conveyor and is conveyed, the cutout ring is moved and rotated in the conveyance direction, and when the cutout portion of the rotating cutout ring is directly above, the cutout portion is formed. Is loosely fitted to the central axis of the screw conveyor and its rotation is regulated. After that, it is conveyed with the notch facing up and aligned on the rhombus pipe via the inclined rail with an inverted T-shaped cross section. It is a thing. Therefore, a motor-driven screw conveyor is required to correct the orientation of the notch ring, and the device becomes large, and in the case of a long one such as a spring pin, the slit is used as the central axis of the screw conveyor. Since it cannot be loosely fitted, it cannot be used as a device for correcting the attitude of the spring pin and supplying it to the pin press-fitting machine or the like.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a cylindrical article supply device capable of efficiently correcting and supplying a posture of a cylindrical article without using power and having a simple structure. .

Means for Solving the Problems As a means for solving the above problems, the present invention is
In a cylindrical article supply device for supplying a cylindrical article having a deviation between the center of the cross-sectional shape and the position of the center of gravity, the posture is corrected to a predetermined direction without using power, the cylindrical article A supply path having an inner diameter larger than the outer diameter, a smooth inner peripheral surface, and an article insertion port at its upper end is provided with a gradient over the entire length so that the cylindrical article can slide down naturally in the supply path. It is characterized in that it is provided so that its lower end faces the supply destination, and that a protrusion is provided on the lower portion of the side surface of the inner peripheral surface of this supply passage.

Operation With the above-mentioned configuration, the cylindrical article thrown in from the throw-in port at the upper end slides down by its own weight in the inclined supply passage, and when passing through the supply passage,
The protrusion comes into contact with the side of the cylindrical article that is going to slide down linearly, and a force that pushes this cylindrical article laterally is applied. Downhill while swinging. At this time, since the center of the cross-sectional shape and the position of the center of gravity of the cylindrical article are deviated from each other, when the center of gravity is at a high position, the cylindrical article rolls while sliding down while rolling. The movement of the center of gravity downward is promoted,
It is corrected to a predetermined posture in a short time, that is, a posture in which the position of the center of gravity is directly below, and is stabilized, and is supplied to the supply unit in a predetermined posture.

Examples Hereinafter, an embodiment in which the cylindrical article supply device according to the present invention is applied to a spring pin supply device for supplying a spring pin to a pin press-fitting machine as an example of a cylindrical article will be described with reference to FIGS. 1 to 5. explain.

The pin press-fitting machine 10 with the spring pin supply device receives the spring pin 11 to be supplied, and the spring pin receiving member 12
The receiving pin moving cylinder 13 for moving the spring pin receiving member 12 to the press-fitting position, the work clamp cylinder 15 for fixing the cylindrical work 14, which is the counterpart for press-fitting the spring pin 11, and the spring pin 11 for the work 14. A press-fitting cylinder 16 for press-fitting the spring pin and a spring pin supply device 17 for supplying the spring pin 11 to the spring pin receiving member 12 are provided.

The spring pin receiving member 12 is provided with a guide groove 19a on the upper surface of a guide base 19 fixed to the horizontal upper surface of the jig base 18.
It is disposed so as to be slidable in the horizontal direction, and a V groove 12a which is a receiving portion of the spring pin 11 is provided on the upper surface of the spring pin receiving member 12 with respect to the sliding direction of the spring pin receiving member 12. Are formed at right angles. Further, on both sides of the spring pin receiving member 12, receiving guides 20, 20 having an L-shaped cross section are arranged so as to face each other so as to guide the sliding of the spring receiving member 12, and the height of the receiving member 20 is It is formed to be slightly higher than the height of the spring pin receiving member 12.

Further, the receiving cylinder 13 is fixed on the jig base 18 via a bracket 13a, and the tip of a piston rod 13b thereof is connected to the spring pin receiving 12 to drive the spring pin 11 reciprocally. It is supposed to do.

On the other hand, the work clamp 15 has a base end on the side of the formation position of the V groove 12a at the forward limit position of the spring pin receiving member 12 on the guide base 19 fixed to the jig base 18. A piston rod 15a is vertically provided on an upper portion of a clamp cylinder base 21 which is supported and supported by 18, and a work presser foot 22 is vertically moved at a lower end of the piston rod 15a. Workpiece mount 19 attached to and integrally formed with the guide base 19
A cylindrical work 14 can be vertically clamped between b and.

Further, the press-fitting cylinder 16 is fixed on the jig base 18 via a support base 23 so that the piston rod 16a is horizontal and is perpendicular to the sliding direction of the spring pin receiving member 12, A press-fit rod 24 is connected to the tip of the piston rod 16a on the same axis. Reference numeral 25 is a stopper for positioning the forward limit position of the spring pin receiving member 12.

The spring pin supply device 17 corrects the spring pin 11 so that the slit 11a of the spring pin 11 is directly above and supplies the spring pin 11 onto the V groove 12a of the spring pin receiving member 12, and has a funnel-shaped insertion cap at the upper end. Supply tube with 26 attached
Equipped with 27. The supply tube 27 has an inner diameter of about 1.5 times the outer diameter of the spring pin 11 and is made of a material having a smooth inner surface and a small friction coefficient, such as fluorine resin or stainless steel. Is fixed so that the upper end of the spring pin 11 is substantially vertical, the lower part is curved with a large radius, and is arranged so that the gradient becomes gradually gentle as it goes downward, and the entire length of the spring pin 11 from its lower end. The straight portion L is formed by linearly arranging a section having a length of about 5 times (see FIG. 1). The inclination of the straight line portion L is set to an angle α with respect to the horizontal so that the spring pin 11 naturally slides down the inside of the supply tube 27, and the lower ends of the straight portions L are clamped by fixing fittings 28, 29. And the lower end thereof is located at the backward end of the V groove of the spring pin receiving member 12.
At the position of 12a, it is arranged so as to be perpendicular to the sliding direction of the spring pin receiving member 12 so as to penetrate through the receiving guide 20 on the side of the fixing metal fittings 28 and 29, and the end face of this lower end. Is cut so as to be flush with the side surface of the receiving guide 20 that has penetrated therethrough to form an opening 27a (first
(See Figure and Figure 4).

Further, on the upper side of the straight portion L of the supply tube 27, a pin 30 having a spherical tip and a head having a large diameter is attached so as to penetrate the peripheral wall of the supply tube 27 from the outside. Further, the pin 30 is prevented from coming off by a spring belt 31 which is attached to the outer circumference of the supply tube 27, and the supply tube 27 is provided by a tip protruding through and inward.
A hemispherical projection 30a is formed on the inner surface side of the. The penetration position of the pin 30 is provided at a position where the angle β with respect to a vertical line passing through the center of the supply tube 27 is about 45 ° (a position diagonally lower right in FIG. 3), and within the protrusion 30a. The projecting height from the peripheral surface is a height that allows contact with the spring pin 11 sliding down in the supply tube 27.

A pair of auto switches 32, 32 are provided on each of the receiving cylinder 13, the work clamp cylinder 15, and the pin press-fitting cylinder 16.

Next, the operation of the apparatus according to this embodiment configured as described above will be described.

Spring pin supply device 17 provided on the pin press-fitting machine 10
The springs 11, which are charged one by one or collectively in the charging mouthpiece 26, have a smooth inner peripheral surface and slide down in the supply tube 27 arranged with an inclination by its own weight, As the gradient of 27 gradually becomes gentle, the downhill speed decreases and reaches the straight line portion L arranged at the gentlest gradient. The spring pin 11 that slowly descends in the straight portion L of the supply tube 27 comes into contact with the protrusion 30a that protrudes in a hemispherical shape from the lower side of the inner surface and is pushed laterally, and as a result, the spring pin 11 slightly swings laterally. Is induced, the spring pin 11 slides down in the straight portion L of the supply tube 27 while swinging laterally.

In the spring pin 11 which slides down while swinging laterally in the straight portion L of the supply tube 27, the position of the center of gravity O is slightly displaced from the center of the cross-sectional shape because the slit 11a is formed, and therefore the position of the center of gravity O is high. And in the supply tube
When it is located off the vertical center line Q of 27,
This center of gravity O always tries to move downward. Moreover, the inner surface of the supply tube 27 is smooth and has a small coefficient of friction, and since it slides down, the frictional resistance at the contact point P with the inner surface, which is a sliding surface, is small, so that the center of gravity O moves easily and rotates downward. Furthermore, the spring pin 11 swings laterally and slides down while rolling left and right while being in contact with the inner surface of the supply tube 27, so that the center of gravity O is changed to the supply tube 27 as shown in FIG. When it is on the left side of the vertical center line Q of, the amount of rolling to the left is larger than the amount of rolling to the right, and the robot moves to the lower side of the center of gravity O (see FIGS. 5B and 5C).
Is corrected, the movement of the center of gravity O is completed in a short time (about 0.5 seconds), the lateral shake is also attenuated, and the position of the slit 11a is corrected to a predetermined posture (see FIG. 5 (d)). Being stable.

Therefore, even when the center of the cross-sectional shape and the position of the center of gravity O are slight like the spring pin 11, the posture can be easily corrected by slightly swinging laterally during the downhill.

In addition, the spring pin 11 sliding down in the supply tube 27
However, when the slit 11a is located directly below or almost directly below and the direction of gravity F substantially overlaps with the vertical center line Q and slides down stably in the opposite posture (see FIG. 5 (e) (f)) Means that the spring pin 11 that slides down in the reverse posture when passing through the straight portion L of the supply tube 27 has the protrusion 30a.
Then, the stable reverse posture is destroyed and lateral shake is induced (see FIGS. 5 (g) and 5 (h)), and the posture is corrected in a short time by rotating as in the case described above.

Then, the spring pin 11 corrected to a predetermined posture
Is slid down to the lower end in the supply tube 27, slides out from the opening 27a, and is supplied in a predetermined posture onto the V groove 12a of the spring pin receiving member 12 waiting at the backward limit position.

On the other hand, on the work receiving plate 19b, a cylindrical work 14 having a pin hole formed from the outer peripheral surface toward the center is supplied in a vertical posture, and the pin hole slides the spring pin receiving plate 12. So that it faces in a direction perpendicular to the direction of movement,
It is fixed by a work clamp 22 that is driven by the work clamp cylinder 15 and descends.

When the spring pin 11 is supplied to the V-shaped groove 12a, the spring moving cylinder 13 drives the spring pin receiving member 12 to move forward, and advances to the forward limit position where it abuts on the stopper 25.

When the spring pin bracket 12 reaches the forward limit position, the V groove
The spring pin 11 on the 12a is positioned on the extension line of the axis of the piston rod 16a of the press-fitting cylinder 16. When the press-fitting cylinder 16 advances the press-fitting rod 24, the spring pin on the V-groove 12a is moved. 11 is pressed by the press-fitting rod 24 and press-fitted into the pin hole of the work 14.

When the press-fitting of the spring pin 11 into the work 14 is completed,
The press-fitting cylinder 16 drives the press-fitting rod 24 backward, and then drives the receiving-cylinder moving cylinder 13 to drive the spring pin receiving 12 forward and backward. When the spring pin receiving member 12 driven backward is returned to the backward limit position, the V groove 12a is moved to the opening 20 and the opening 27a is opened, so that the next spring pin 11 is moved to the V groove 12a. Supplied on.
Next, the work clamp 22 drives the work clamp foot 22 to rise, and the clamp of the work 14 is released.
When the work 14 having the spring pin 11 press-fitted therein is discharged, a new work 14 is clamped again, and one cycle of the press-fitting process of the spring pin 11 is completed.

In this way, the spring pin 11 that is press-fitted into the work 14 is press-fitted in a fixed posture with the slit 11a positioned right above.

It should be noted that while the spring pin receiving member 12 is being driven by the money receiving moving cylinder 13 to move to the forward side, the opening portion
Since a part of 27a is blocked by the side surface of the spring pin receiving member 12, even if the next spring pin 11 whose posture has already been corrected exists in the supply tube 27, it does not come out from the opening 27a.

EFFECTS OF THE INVENTION As described above, the cylindrical article supply device according to the present invention has a supply passage having an inner peripheral surface having a larger inner diameter than the outer diameter of the cylindrical article and having an article inlet at its upper end, The cylindrical article is provided with a gradient over its entire length so that the cylindrical article can slide down naturally, and its lower end faces the supply destination, and the lower side surface of the inner peripheral surface of this supply path is provided. Since the projection is provided on the base, it is possible to correct the supply posture of the cylindrical article in a short time. Moreover, since the structure is simple, there are few failures, and it can be manufactured at low cost. Unlike the vibration type parts feeder, it does not generate noise, and the running cost can be reduced. In addition, since it has few components and is compact, it does not require a large installation space, can be easily incorporated into various equipment, and can be used for posture correction and supply of various cylindrical articles with different outer diameters. Have.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is a sectional front view showing a spring pin supply device, and FIG. 2 is a pin press fit with the spring pin supply device of this embodiment. Fig. 3 is a perspective view of the machine, Fig. 3 is an enlarged sectional view taken along line III-III in Fig. 1, Fig. 4 is an enlarged sectional view taken along line IV-IV in Fig. 1, and Fig. 5 (a) (b) (c) ( D) (e) (f) (g)
FIGS. 6 to 9 show conventional examples, FIG. 6 is a perspective view of a spring pin, and FIG. 7 is a bowl. FIG. 8 is a plan view of the type parts feeder, FIG. 8 is an enlarged perspective view of the same main part, and FIG. 9 is an enlarged sectional view taken along line IX-IX of FIG. 10 …… Pin press-fitting machine, 11 …… Spring pin, 11a …… Slit, 12 …… Sprink pin receiver, 12a …… V groove, 14
…… Workpiece, 16 …… Press-fit cylinder, 17 …… Spring pin supply device, 20 …… Receiving guide, 24 …… Press-fit rod, 26 ……
Insertion mouth, 27 …… Supply tube, 27a …… Opening, 28,29
...... Fixing metal fittings, 30 ...... pins, 30a ...... protrusions, 31 ...... spring belts, F …… gravity direction, O …… gravity center, P ……
Contact point, Q ... Vertical center line.

Claims (2)

(57) [Claims] 1. A cylindrical article supply apparatus for supplying a cylindrical article having a cross-sectional center and a center of gravity that are displaced from each other by adjusting the posture so as to have a predetermined direction without using power, A supply path having an inner peripheral surface having a larger inner diameter than the outer diameter of the cylindrical article and having an article inlet at its upper end, the entire length of which allows the cylindrical article to slide down naturally in the supply path. A cylindrical article supply device, characterized in that it is provided with a gradient over the entire length, its lower end faces the supply destination, and a projection is provided on the lower part of the side surface of the inner peripheral surface of this supply path. 2. The cylindrical article supply device according to claim 1, wherein the inner diameter of the supply path is 1.5 to 2.0 times the outer diameter of the cylindrical article to be supplied.