JP2000225533A - Cut washer inserting method and device thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily insert a cut washer into a shaft by expanding a hole of a cut washer by a shaft having a larger diameter than a hole diameter of the cut washer, abutting the cut washer on a tip of the shaft of a work in a state that the shaft is inclined, moving the cut washer in the shaft direction of the work, conically revolving the cut washer, and inserting the cut washer. SOLUTION: The whole of an inserting device A is inclined by a cylinder device 12, a piston 10a of an elevating/lowering device 10 is projected and a tip of a shaft 3 is lowered till the tip is brought into contact with a tip of a shaft 8 of a work 7. In a state that the tip of the shaft 3 and the tip of the shaft 8 of the work 7 are brought into contact with each other, air pressure of an air cylinder 4 putting in/out the shaft 3 is made an open state, the piston 10a of the elevating/lowering device 10 is further projected and at the same time, a revolving device 11 is revolved as shown in an arrow. At this time, because the shape of a tip projection surface of the shaft 8 viewed from the tip of the shaft 3 becomes an elliptical shape, radial load that a cut washer 2 receives is for only a major side 8a of the ellipse and deformation amount is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for inserting a cut washer.

[0002]

2. Description of the Related Art Conventionally, as a retaining ring at the tip of a shaft, a cut washer 2 such as a nylon washer having a radial split 2a as shown in FIG. Some are forcibly inserted into the formed groove 8a. The insertion of the cut washer 2 into the shaft 8 is performed by an insertion device as shown in FIG.

An insertion device A shown in FIG. 7 is provided with a center hole 2 of the cut washer 2 facing the supply device 1 of the cut washer 2.
A shaft 3 that enlarges b is supported by an air cylinder 4 so as to be able to retreat in the axial direction. A stripper 5 is arranged around the shaft 3 so that when the shaft 3 is retracted, the cut washer 2 fitted to the shaft 3 is removed by the stripper 5.

The air cylinder 4 and the stripper 5 are respectively mounted on brackets 6, and the brackets 6 can be moved in the vertical direction in FIG. The lifting device 10 includes an arm 9a and a slider (not shown).
The insertion device A is slidably supported by the slide rail 9b in the left-right direction of FIG. 1 through the slide rail 9b. .

[0005] The work 7 has a shaft 8 and a groove 8 for accommodating the cut washer 2 on the outer periphery of the upper end of the shaft 8 as shown in FIG.
a is provided. The lifting operation by the lifting device 10 and the parallel movement along the slide rail 9b can be automatically controlled by a control device (not shown). Next, an operation of attaching the cut washer 2 to the shaft 8 by the above-described device will be described.

[0006] First, one cut washer 2 is supplied to the supply device 1, and the shaft 3 is lowered by the elevating device 10 while being protruded by the air cylinder 4, and the hole 2 of the cut washer 2 is formed.
b. Since the diameter of the cut washer 2 expands elastically at the split 2a, the cut washer 2 is caught by friction on the outer periphery of the shaft 3, and when the shaft 3 is raised by the elevating device 10, the cut washer 2
Rise together, move along the slide rail 9b, and move right above the work 7.

The shaft 3 is lowered by the lifting device 10 again,
The tip of the shaft 3 is brought into contact with the tip of the shaft 8. Thereafter, when the air pressure of the air cylinder 4 that drives the shaft 3 is released and the lifting device 10 is further lowered, the shaft 3 comes into contact with the tip of the shaft 8 and stops, but the stripper 5 moves down together with the lifting device 10. Therefore, the cut washer 2 is moved extremely from the shaft 3 to the shaft 8, and eventually reaches the groove 8a.

Since the depth of the groove 8 is set to be the same as the hole diameter of the cut washer 2 in a no-load state, the groove 8 contracts and fits into the groove 8. Thereafter, the shaft 3 and the stripper 5 are raised by the lifting device 10, and the insertion operation is completed.

[0009]

By the way, in order to facilitate insertion of the cut washer 2 by the above-mentioned conventional method, the shaft 3
If the diameter of the cut washer 2 is equal to or larger than that of the shaft 8, the cut washer 2 will be plastically deformed with the split 2b open and will not return to the original shape, and will not fall into the groove 8a even after shifting to the shaft 8. was there.

Conversely, when the diameter of the shaft 3 is made smaller, a step of increasing diameter is formed from the shaft 3 toward the shaft 8, and the cut washer 2 catches on the end face of the shaft 8 during the transition to the shaft 8, from which the shaft 8 is moved. Forcibly pushing in the direction may deform the cut washer 2, thereby lowering the manufacturing yield. In particular, if the chamfer of the shaft 8 is small, this disadvantage becomes remarkable. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to make it possible to easily insert a cut washer into a shaft without deforming the cut washer, thereby improving productivity.

[0011]

In order to achieve the above object, a method for inserting a cut washer according to the present invention expands a hole of the cut washer with a shaft having a diameter larger than the hole diameter of the cut washer, and keeps the shaft inclined. The cut washer was moved in the axial direction of the work and inserted while rotating in a conical shape against the tip of the work shaft.

According to this method, since the cut washer is moved from the axis that moves while drawing a conical surface with respect to the axis of the work, the cut washer can be smoothly moved and inserted. In order to achieve the above object, the cut washer insertion device of the present invention includes a shaft for enlarging the hole of the cut washer, a transfer device for tilting the shaft, a turning device for conical turning, and a stripper for transferring the cut washer. It is characterized by having.

[0013] According to the cut washer insertion device of the present invention, the cut washer can be inserted into the shaft without being deformed, and the productivity can be improved.

[0014]

According to a first aspect of the present invention, there is provided a method for inserting a cut washer, wherein a shaft having a diameter larger than the diameter of the hole of the cut washer is passed through the hole of the cut washer, and the tip of the shaft is inclined to the tip of the shaft of the work. The cut washer is transferred to the axis of the work while abutting and rotating the inclined large-diameter axis to draw a conical surface with the axis as a generating line.

According to this method, since the cut washer is moved from the axis that moves while drawing a conical surface with respect to the axis of the work, the projected surface of the axis to be moved on the cut washer becomes elliptical, and its short axis Is smaller than the previous shaft, so that the insertion can be performed without difficulty, and in this state, the cut washer is rotated once along the conical surface, so that the movement can be performed without difficulty.

According to a second aspect of the present invention, there is provided a cut washer insertion device, wherein a shaft having a diameter larger than a hole diameter of the cut washer, a stripper of the cut washer fitted externally to the shaft, and a shaft extending and retracting with respect to the stripper. A driving device that drives the shaft so as to be capable of rotating the shaft with respect to the axis of the work; and a turning device that turns the shaft in a conical shape with the tilted shaft as a generating line.

According to this device, it is only necessary to add a device for rotating the conventional cut washer insertion device in a conical shape about the axis of the work, so that the implementation is easy. Next, an embodiment of the present invention will be described. FIG. 1 shows a side view of the cut washer insertion device of the present invention. The cut washer insertion device according to the embodiment of the present invention is the same as the conventional device A except that the conventional device A performs a conical movement about the axis 8 of the work 7 as the tip center. The same reference numerals as those shown in FIG. 7 denote the same parts, and a detailed description thereof will be omitted.

In FIG. 1, the arm 9a supporting the cut washer insertion device A is
The turning device 11 is attached to a slider 9c so as to be rotatable around the axis of the rotating device 9c. The lifting device 10
A cylinder device 12 that inclines the elevating device 10 at an inclination angle θ is vertically connected to a fulcrum 10a attached to the arm 9a by a pin 10b.

That is, the cut washer insertion device A can be inclined at an inclination angle θ with respect to the arm 9a, and can be rotated around the arm 9a as a rotation axis while maintaining the inclination angle θ. The cylinder device 12 is pivotally supported on the arm 9a by a pin 12a, and the cylinder device 12 itself is pivotally supported on the arm 9a.

Next, the method of inserting a cut washer according to the present invention will be described together with the operation of the above-described device. First, the cut washer 2 is supplied to the supply device 1, and the shaft 3 is lowered and penetrated by the elevating device 10 while being protruded by the air cylinder 4. The cut washer 2 is caught on the shaft 3 by friction. In this state, the entire insertion device A is raised by the lifting device 10,
The insertion device A is moved in parallel along the slide rail 9b, and stopped at a position where the axis of the arm 9a is aligned with the axis 8 of the work 7.

Next, the insertion device A is operated by the cylinder device 12.
The whole is inclined and the piston 10a of the lifting device 10
Is projected and lowered until the tip of the shaft 3 contacts the tip of the shaft 8 of the work 7. With the tip of the shaft 3 and the tip of the shaft 8 of the work 7 kept in contact, the air pressure of the air cylinder 4 for moving the shaft 3 is released, and the piston 10a of the elevating device 10 is further protruded and simultaneously turned. The device 11 is turned as shown by the arrow.

At this time, the shape of the projection surface of the tip of the shaft 8 viewed from the tip of the shaft 3 is such that the major axis 8a is the diameter of the shaft 8, as shown in FIG.
Since the short axis 8b has an elliptical shape with a diameter smaller than the diameter of the axis 8, the radial load applied to the cut washer 2 is only the long side 8a of the ellipse, and when the entire circumference of the cut washer 2 is vertically inserted. As a result, the amount of deformation is reduced.

Since the relationship between the inner diameter hole of the stripper 5 and the shaft 8 is the same as above, the stripper 5 is also inclinedly fitted to the shaft 8 as shown in an enlarged view in FIG. Push cut washer 2 down. For this reason, the diameter of the cut washer 2 is expanded without difficulty by the split 2a, fitted to the shaft 8, pushed by the stripper 5, and partially fitted into the groove 8a.

Therefore, the shaft 3 is moved by the turning device 11 in FIG.
When it is turned along the conical surface 3a as shown in (1), the cut washer 2 spirals and enters the groove 8a,
The whole enters the groove 8a in about one rotation. Since the depth of the groove 8a is the same as the hole diameter of the cut washer 2 in an unloaded state, the cut washer 2 does not fall out once it contracts and enters the groove 8a.

Thereafter, the hole expanding shaft 3 and the stripper 5 are raised by the lifting device 10, and the insertion operation is completed. As described above, the cut washer 2 is fitted to the shaft 8 of the work 7. In the above-described embodiment, the shaft 3 and the shaft 8 both have a chamfered shape in which the tip surfaces are both convex. However, both shaft ends are cut into a flat surface, or one shaft end is a flat surface, and the other. The same can be applied to the case where the shaft end is chamfered into a convex shape.

In the above embodiment, a nylon cut washer 2 having an outer diameter of 2.2 mm, an inner diameter of the hole 2a of 0.8 mm, and a thickness of 0.25 mm was mounted on the shaft 8 having a diameter of 1.2 mm on the workpiece 7 side. As shown in FIG.
The diameter of the shaft was 0.95 mm, the angle of inclination θ of the shaft 3 was 10 ° to 30 °, and the end face finishing of the tip was carried out with and without chamfering. Efficient insertion of cut washer was possible without accident.

[0027]

As described above, according to the present invention, the shaft of the conventional cut washer insertion device can be inclined, and the cut washer is inserted obliquely with respect to the shaft so as to draw a conical surface. Therefore, the fitting can be smoothly performed without applying an excessive force to the cut washer, and there is an effect that the occurrence of a fry rate is lower than before and the productivity can be improved.

Further, the device of the present invention can be smoothly inserted into the shaft of the conventional insertion device only by making the shaft pivotable without deforming the cut washer. Has an effect.

[Brief description of the drawings]

FIG. 1 is a side view of a cut washer insertion device according to an embodiment of the present invention.

FIG. 2 is a front view of a main part of the cut washer insertion device according to the embodiment of the present invention.

FIG. 3 is an enlarged sectional view of a main part of the cut washer insertion device according to the embodiment of the present invention;

FIG. 4 is an operation explanatory view of the cut washer insertion device according to the embodiment of the present invention;

FIG. 5 is a perspective view of a cut washer.

FIG. 6 is a side view of a shaft into which a cut washer is inserted.

FIG. 7 is a side view of a conventional cut washer insertion device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Supply device 2 Cut washer 3 Axis 4 Air cylinder 5 Stripper 6 Bracket 7 Work 8 Axis 8a Concave groove for cut washer 9 Transfer device 10 Lifting device 11 Rotating device 12 Cylinder device

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Okazaki 1006 Kazuma Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. 72) Inventor Hideo Ito 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. BC21 3J037 AA08 BB08 JA12

Claims (2)

[Claims] 1. A shaft having a diameter larger than a hole diameter of a cut washer penetrates a hole of the cut washer, and a tip of the shaft is inclined to abut on a tip of a workpiece shaft to contact the inclined large diameter shaft. A method of inserting a cut washer in which the cut washer is transferred to an axis of the work while being swiveled to draw a conical surface with this axis as a generatrix. 2. A shaft having a diameter larger than a hole diameter of a cut washer, a stripper of the cut washer fitted externally to the shaft, and a driving device for driving the shaft to move back and forth with respect to the stripper; A cut washer insertion device, comprising: a tilting device that tilts the shaft with respect to the axis of the workpiece; and a turning device that turns the shaft in a conical shape with the tilted shaft as a generating line.