JPH06226557A - Inserting method for axial parts - Google Patents

Abstract

PURPOSE:To make it possible to easily insert an axial parts into a plural number of bore parts without causing any twist on them by conforming fitting bores of a plural number of bore parts with each other coaxially without requiring any high precision positioning mechanism. CONSTITUTION:A first bore parts 1, having an axial parts fitting bore 1a formed thereon, is placed on a first bore parts stand 12 and a second bore parts 2, having an axial parts fitting bore formed thereon, is placed on a second bore parts stand 13. A guide pin 15, having the same diameter as an axial parts 3, is rised until it pierces through the axial parts fitting bore of the second bore parts 2. The guide pin 15 easily fits into the axial parts fitting bore of the second bore parts 2 because the tip of the guide pin 15 is made in a conical shape and respective axial parts fitting bores conform with each other coaxially even if the respective axial parts fitting bores do not conform with each other coaxially at first. By pressing in the axial parts 3 into the axial parts fitting bore 1a of the first bore parts 1 from the top and pushing down the guide pin 15 under this condition, the axial parts 3 are inserted into the respective axial part fitting bores.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of inserting a shaft part into a plurality of hole parts.

[0002]

2. Description of the Related Art Conventionally, insertion of a shaft part into a plurality of hole parts each having a fitting hole formed therein has been performed manually by an operator. At this time, the operator aligns the hole parts such that the center axes of the fitting holes are substantially aligned with each other, and in this state, inserts the shaft parts into the fitting holes of the hole parts. The position of each hole part was determined by the intuition of the operator.

[0003]

However, in the above-mentioned conventional insertion method, since the position of each hole component is adjusted by the operator's intuition, the number of products produced by each operator varies depending on the skill level of the operator. However, it was difficult to secure a stable production volume. Especially when the clearance between the shaft part and the hole part and the chamfering amount of the shaft part are very small,
When one hole part is placed inside another hole part, this alignment takes more time, is less productive, and is a heavy burden on the operator. Also, during the insertion of the shaft component, the relative position of the hole component in which the shaft component has not been inserted yet, and the hole component in which the shaft component has been inserted may shift, which causes prying and scratches, etc. There is also a problem in that quality is adversely affected.

In order to solve each of the above-mentioned problems, it is conceivable to automatically position each hole component by a robot, but in this case, a robot capable of highly accurate positioning is not used. It was difficult to coaxially match the fitting holes of the respective hole parts with each other.

Therefore, an object of the present invention is to make the fitting holes of a plurality of hole parts coincide with each other on the same axis without the need for a highly accurate positioning mechanism, so that the shaft part can be made into a plurality of hole parts without prying. It is to provide a method of inserting a shaft component that can be easily inserted.

[0006]

In order to achieve the above object, the present invention provides a plurality of hole parts each having a fitting hole formed from one end to the other end and arranged at a predetermined position. In the insertion method of the shaft component, which inserts a shaft component with a small clearance margin, a guide pin whose end has a large chamfer and whose diameter is equal to the diameter of the shaft component is provided from one end side of each hole component. After sequentially passing through the fitting holes of all the hole parts, contact the tip end of the guide pin with the tip end surface of the shaft part such that the center axis of the guide pin and the center axis of the shaft part coincide with each other. The guide pin is pushed out from each hole component by pushing the shaft component from the other end side toward the one end side of each hole component in that state.

At least one hole component among the hole components may be arranged in an opening formed in the middle of the fitting holes of the other hole components.

Further, after the fitting holes of all of the hole parts are sequentially passed through, instead of being inserted halfway into the fitting holes of the last hole part among the hole parts, or the guide pin tip. The chamfering amount may be equal to the radius of the guide pin, and the tip end surface of the shaft part may have a center hole formed in advance.

[0009]

In the present invention constructed as described above, the guide pin having the same diameter as the shaft part inserted into the fitting hole formed in each of the plurality of hole parts is penetrated from one end side of each hole part. Thus, each hole component is held in a state where the center axes of the fitting holes are aligned with each other without requiring a highly accurate positioning mechanism. At this time, since the tip of the guide pin has a large chamfer, the guide pin easily fits into the fitting hole of each hole component even if the center axis of the fitting hole of each hole component is slightly displaced. . After the guide pin penetrates through each hole component, contact the tip of the guide pin with the tip surface of the shaft component so that the center axis of the guide pin and the center axis of the shaft component are aligned. The guide pin is pushed out from each hole component by pushing in from the other end side of the hole component toward one end side.
As a result, the shaft component is inserted into the fitting hole of each hole component while maintaining the state where the central axes of the fitting holes of the hole components are aligned.

In the above-mentioned method, in particular, at least one hole component among the hole components is arranged in the opening formed in the middle of the fitting holes of the other hole components, and it is difficult to align the hole components. It is effective in some cases. Also, instead of passing the guide pin through the fitting holes of all the hole parts, by inserting it part way into the fitting holes of the last hole parts, the fitting holes of the last hole parts serve as guides for the shaft parts, It becomes easy to coaxially align the guide pin and the shaft component. Furthermore, by making the chamfered amount of the tip of the guide pin equal to the radius of the guide pin and forming a center hole in the tip surface of the shaft part, the tip of the guide pin becomes conical and the guide pin and the shaft part are contacted. When contacted, the tip of the guide pin fits into the center hole of the shaft part. Therefore, when the shaft component is pushed in, the center axes of the shaft component and the guide pin do not shift, and it becomes easy to coaxially align the guide pin and the shaft component.

[0011]

Embodiments of the present invention will now be described with reference to the drawings.

(First Embodiment) FIG. 1 is a partially broken perspective view of an example of a shaft component inserting apparatus used for implementing the present invention, and FIG. 2 is a hole component positioning apparatus shown in FIG. Device A
FIG.

As shown in FIG. 1, the shaft component insertion apparatus of this embodiment has a hole component positioning device 10 for positioning the first hole component 1 and the second hole component 2, and the first positioned component. And the assembly robot 20 for inserting the shaft component 3 into the hole component 1 and the second hole component 2.

First, the structure of the hole component positioning device 10 will be described with reference to FIGS. The hole component positioning device 10 has a base 11 that is L-shaped when viewed from the side, and a cylinder 14 in which a rod 14a is driven in the vertical direction is fixed to the bottom wall of the base 11. A guide pin 15 whose diameter is substantially equal to that of the shaft component 3 and whose tip is chamfered into a conical shape is fixed to the upper end portion of the rod 14a in a state where its axis is oriented in the vertical direction. A protruding surface 11a extending in the horizontal direction is integrally provided at an intermediate portion of the side wall of the base 11. The guide pin 1 is provided on the protruding surface 11a.
A through hole 11b through which the first hole component 5 is penetrated is formed coaxially with the guide pin 15, and a first hole component holder 12 on which the first hole component 1 is mounted is fixed to the upper surface of the protruding surface 11a. ing. A through hole 12 a, through which the guide pin 15 penetrates, is also formed in the first component holder 12 coaxially with the guide pin 15.

The first hole component 1 is formed with a shaft component fitting hole 1a having a diameter slightly larger than the diameter of the shaft component 3 into which the shaft component 3 is finally fitted. Further, in the first hole component 1, a counterbore 1c is formed on the lower end surface of the first hole component 1 concentrically with the shaft component fitting hole 1a, and at the same time, the shaft component fitting hole 1a.
An opening 1b in which a second hole component 2 to be described later is arranged is formed in the middle part of the. On the other hand, the first hole component holder 12
At the upper end of the positioning protrusion 12b that fits in the spot facing 1c.
Is formed concentrically with the through hole 12a of the first hole component holder 12. When mounting the first hole component 1 on the first hole component holder 12, the positioning protrusions 12b of the first hole component holder 12 are fitted to the counterbore 1c of the first hole component 1. . As a result, the first hole component 1 is positioned, and the shaft component fitting hole 1a of the first hole component 1 is inserted into the guide pin 1
5 will be located on the same axis.

The first side wall of the base 11 has a first upper end.
On the side of the opening 1a of the hole component 1, a second hole component holder 13 on which the second hole component 2 is placed is shown by an arrow B in the figure.
It is provided so that it can move in any direction. The second hole component holder 13 has a recess 13a formed at the tip thereof so that the guide pin 15 and the shaft component 3 can pass therethrough. The second hole component 2 is the second hole component holder. It is placed on the part of the groove 13 where the recess 13a is formed. The second hole part 2 has a first
The same shaft component fitting hole 2a as that of the hole component 1 is formed, and when the second hole component 2 is mounted on the second hole component holder 13, the shaft of the second hole component 2 is The component fitting hole 2a is the recess 1
It is placed so as to be located above 3a. Then, the second hole component holder 13 on which the second hole component 2 is placed is
By moving toward the opening 1b of the hole component 1 of
The hole component 2 of 1 is arranged in the opening 1 b of the first hole component 1.

Next, the structure of the assembling robot 20 will be described with reference to FIG. FIG. 3 is a schematic perspective view showing the configuration of the assembling robot shown in FIG.

As shown in FIG. 3, the assembling robot 20 includes:
Right angle for three-axis control, which includes an X-axis arm 21 that moves in the X-axis direction, a Y-axis arm 22 that moves in the Y-axis direction, and a Z-axis arm 23 that moves in the Z-axis direction (vertical direction). It is a coordinate robot. At the lower end of the Z-axis arm 23, XY
A slide mechanism 25 is attached through a floating mechanism 24 that can swing a little in a plane, and a finger 26 that holds the shaft component 3 is attached to the slide mechanism 25. As a result, the shaft components 3 arranged on the shaft component holder 30 are gripped by the fingers 26, and
As shown in FIG. 5, the first hole component 1 is conveyed above the shaft component fitting hole 1a positioned by the hole component positioning mechanism 10.

Next, the operation of the shaft component inserting apparatus of this embodiment will be described.

First, as shown in FIG. 1 and FIG.
The hole component 1 of No. 1 is placed on the first hole component holder 12 so that the positioning protrusion 12b of the first hole component holder 12 fits into the spot facing 1c to position the first hole component 1. To do.
Next, the second hole component 2 is placed on the second hole component holder 13 and the second hole component 2 is set in the opening 1b of the first hole component 1.

The first hole component 1 is attached to the hole component positioning device 10.
After setting the second hole component 2, the rod 14a of the cylinder 14 is projected and the guide pin 15 is raised. As a result, the guide pin 15 becomes the first hole component holder 1
It penetrates through the through hole 12a of No. 2 and reaches the shaft part fitting hole 1a of the first hole part 1. Here, by mounting the first hole component 1 on the first hole component holder 12, the shaft center of the shaft component fitting hole 1a of the first hole component 1 and the guide pin 15 are aligned. Therefore, the guide pin 15 is fitted in the shaft part fitting hole 1a of the first hole part 1 as it is. Further guide pin 15
Is moved upward, the guide pin 15 passes through the recess 13a of the second hole component holder 13 and reaches the shaft component fitting hole 2a of the second hole component 2. At this time, since the second hole component 2 is only placed on the second hole component holder 13,
The axial center of the shaft component through hole 2a of the second hole component 2 and the guide pin 15 do not always match. However, since the tip end portion of the guide pin 15 is chamfered into a conical shape, the shaft component through hole 2a of the second hole component 2 and the guide pin 1 are formed.
Even if the axial center of the guide pin 1 is deviated, the second hole component 2 is deviated along the chamfered shape of the guide pin 15 while the guide pin 1
5 is fitted in the shaft component fitting hole 2a of the second hole component 2. Then, the movement of the guide pin 15 is stopped at the position where the guide pin 15 penetrates the shaft component fitting hole 2a of the second hole component 2. In this state, the shaft component fitting hole 1 of the first hole component 1
The axes of a and the shaft component fitting hole 2a of the second hole component 2 are aligned.

When the upward movement of the guide pin 15 is stopped, the assembling robot 20 causes the shaft component holder 30 to move.
The upper end of the shaft component 3 arranged in (see FIG. 3) is gripped and conveyed to above the shaft component fitting hole 1a of the first hole component 1. Thereafter, the Z-axis arm 23 (see FIG. 3) of the assembling robot 20 is lowered to lower the shaft component 3, and the shaft component 3 is moved into the shaft component fitting hole 1 of the first hole component 1 as shown in FIG.
Insert into a, until the tip contacts the guide pin 15.
When the shaft component 3 contacts the guide pin 15, the shaft component 3 is further lowered and the guide pin 15 is pushed down.

As a result, the shaft component 3 is inserted into the shaft component fitting hole 2a of the second hole component 2, but at this time the second component is inserted.
The shaft center of the shaft part fitting hole 2a of the hole part 2 of FIG.
Since the shaft component 3 is aligned with the shaft center of the shaft component 3, the shaft component 3 is smoothly fitted into the shaft component fitting hole 2a of the second hole component 2 only by lowering the shaft component 3, and Second hole part 2
Twisting with the shaft component fitting hole 2a does not occur.
Then, by lowering the shaft component 3 as it is, the shaft component 3 penetrates the shaft component fitting hole 1a of the first hole component 1 and the shaft component fitting hole 2a of the second hole component 2, and the first component The shaft component 3 is inserted into the hole component 1 and the second hole component 2.

As described above, in this embodiment, the shaft component fitting holes 1a and 2a of the first hole component 1 and the second hole component 2 are positioned by the respective shaft component fitting holes 1a and 2a.
The guide pin 15 can be passed through the guide pin 15 in a very simple manner. Further, since the shaft component 3 is inserted into the first hole component 1 and the second hole component 2 in that state, the first hole component 1 and the second hole component 2 are inserted.
The shaft component 3 can be easily inserted into the shaft component fitting holes 1a and 2a of the first hole component 1 and the second hole component 2 respectively.
It is possible to stably produce a product of stable quality without causing twisting of the shaft component 3.

(Second Embodiment) FIG. 5 is a perspective view of another example of the shaft component inserting apparatus used for implementing the present invention.
FIG. 6 is a sectional view of the hole component positioning device shown in FIG. The shaft component inserting apparatus of the present embodiment also has a hole component positioning device 50 and an assembling robot 60 as in the first embodiment.
However, since the second hole component 42 is arranged on the first hole component 41 in this embodiment, the configuration of the assembling robot 60 is the same as that shown in FIG. However, part of the configuration of the hole component positioning device 50 is the first
It differs from that of the embodiment. Hereinafter, only the configuration of the hole component positioning device of the present embodiment will be described, and the description of the configuration of the assembling robot 60 will be omitted.

The first hole component 41 has a shaft component fitting hole 41a formed therein, and is positioned and placed on a first hole component holder 52 fixed on the protruding surface 51a of the base 51. On the other hand, a second hole component holder 53 is provided at the upper end of the side wall of the base 51 so as to be movable in the direction of the arrow B in the figure, and the second hole component holder 53 is the first hole component 41.
When protruding to the side, the tip portion of the second hole component holder 53 is located above the first hole component 41. Second hole part 42
Is placed on the tip of the second hole component holder 53. Further, the second hole component holder 53 has two component floating preventing claws 53a for preventing the second hole component 42 placed on the second hole component holder 53 from floating upward.
Are provided integrally. Each of these parts floating prevention claws 5
3a is arranged at a position that does not close the shaft part fitting hole 42a of the second hole part 42. The other structure may be the same as that of the first embodiment, and the description thereof will be omitted.

Further, in this embodiment, the shaft component 43 used has a machining center hole (not shown) formed at the center of the lower end surface.

Next, the operation of the shaft component inserting apparatus of this embodiment will be described.

First, the first hole component 41 is placed on the first hole component holder 52, and the second hole component holder 53 is placed.
The second hole component 42 is placed on the. Next, the guide pin 55 is raised by the cylinder 54 to pass through the shaft part fitting hole 41a of the first hole part 41 and the shaft part fitting hole 42a of the second hole part 42. As a result, the shaft centers of the shaft part fitting hole 41a of the first hole part 41 and the shaft part fitting hole 42a of the second hole part 42 are the same as those of the first embodiment. Matches When the guide pin 15 is fitted into the shaft component fitting hole 42a of the second hole component 42, the shaft center of the shaft component fitting hole 42a of the second hole component 42 and the guide pin 55 are deviated. In this case, an upward force is applied to the second hole component 42 by the guide pin 55, and the second hole component 42 tries to float from the second hole component holder 53, but this is caused by the floating of each shaft component. It is prevented by the prevention claw 53a.

The guide pin 55 is fitted into each shaft component fitting hole 41a,
After penetrating 42a, as shown in FIG. 7, the finger 66 of the assembling robot fits the machining center hole at the tip of the shaft component 43 to the tip of the guide pin 55. As a result, the axes of the shaft component 43 and the guide pin 55 are aligned.
Then, in this state, the shaft component 43 is lowered and the guide pin 55 is pushed down, so that the shaft component 4 is moved in the same manner as in the first embodiment.
3 is a shaft part fitting hole 41a of the first hole part 41 and a second part
The shaft component 43 is inserted into the first hole component 41 and the second hole component 42 through the shaft component fitting hole 42 a of the hole component 42.

[0031]

Since the present invention is configured as described above, it has the following effects.

By inserting a guide pin having a large chamfer at the tip into the fitting hole of each hole component, the fitting holes can be easily aligned on the same axis without requiring a highly accurate positioning mechanism. be able to. Then, by simply pushing out the penetrated guide pin from each hole component by the shaft component, the shaft component can be inserted into each hole component while maintaining the state where the fitting holes are coaxially aligned. As a result, the time required for positioning each hole component can be shortened, and twisting does not occur during the insertion of the shaft component, so that a product of stable quality can be stably produced. Further, as described above, since a highly accurate positioning mechanism is not required for positioning each hole component, automation of insertion of the shaft component can be easily achieved.

Further, instead of passing the guide pin through the fitting holes of all the hole parts, the guide pin may be inserted partway into the fitting holes of the last hole part, or the chamfered amount of the tip of the guide pin may be defined as the radius of the guide pin. By making them equal and forming a center hole in the tip surface of the shaft part, the fitting hole of the last hole part and the tip of the guide pin fitting into the center hole become the guide of the shaft part, It becomes easy to coaxially align the guide pin and the shaft component. As a result, the shaft component can be inserted more easily.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of an example of a shaft component insertion device used for implementing the present invention.

FIG. 2 is a sectional view of the hole component positioning device shown in FIG.

FIG. 3 is a schematic perspective view showing the configuration of the assembling robot shown in FIG.

FIG. 4 is a sectional view of the hole component positioning device shown in FIG. 1 as seen in the direction of arrow A, showing a state during insertion of a shaft component.

FIG. 5 is a perspective view of another example of the shaft component insertion device used for implementing the present invention.

6 is a sectional view of the hole component positioning device shown in FIG. 5, as viewed in the direction of arrow A. FIG.

7 is a cross-sectional view of the hole component positioning device shown in FIG. 5 as seen in the direction of arrow A, showing a state during insertion of a shaft component.

[Explanation of symbols]

 1, 41 1st hole component 1a, 2a, 41a, 42a Shaft component fitting hole 1b Opening 1c Counterbore 2,42 Second hole component 3,43 Shaft component 10,50 Hole component positioning device 11,51 Base 11a , 51a Projecting surfaces 11b, 12a Through holes 12, 52 First hole component holder 12b Positioning protrusions 13, 53 Second hole component holder 13a Recess 14, 54 Cylinder 14a Rod 15, 55 Guide pin 20, 60 For assembly Robot 21 X-axis arm 22 Y-axis arm 23 Z-axis arm 24 Floating mechanism 25 Sliding mechanism 26, 66 Finger 30 Axis component holder 53a Component floating prevention claw

Claims (4)

[Claims] 1. A shaft component having a fitting hole formed from one end to the other end, and a shaft component having a small clearance between the fitting holes is inserted into a plurality of hole components arranged at predetermined positions. In the method of inserting parts, after a guide pin having a large chamfered end and a diameter equal to the diameter of the shaft part is inserted through the fitting holes of all the hole parts from one end side of each hole part in sequence. , The tip end of the guide pin is brought into contact so that the center axis of the guide pin and the center axis of the shaft component are in contact with each other, and the shaft component of the hole component A method for inserting a shaft component, characterized in that the guide pin is pushed out from each of the hole components by pushing in from the other end side toward the one end side. 2. The insertion of the shaft part according to claim 1, wherein at least one hole part of each of the hole parts is arranged in an opening formed in the middle of a fitting hole of another hole part. Method. 3. The method according to claim 1, wherein after the fitting holes of all of the hole components are sequentially penetrated, the fitting holes of the last hole component of the respective hole components are partially inserted. The method of inserting the shaft component according to 2. 4. The shaft according to claim 1, wherein the chamfering amount of the chamfer at the tip of the guide pin is equal to the radius of the guide pin, and a center hole is previously formed in the tip surface of the shaft component. How to insert parts.