JPH08155755A - Equipment and method for applying oil - Google Patents

Abstract

PURPOSE: To automate the work to apply oil on the outer circumference of a shaft parts at a low cost before a rubber product is assembled to the shaft parts. CONSTITUTION: A by abutting a center shaft 29 on the upper and lower end parts of the shall parts A to achieve the centering by the movement of upper and lower main actuators 25, and a rotary roller 73 impregnated with oil is lowered to apply oil in the circumference of the shaft parts A. A groove is formed over the whole circumference of the rotary roller 73 so that the section may present the semi-circular shape whose diameter is approximately as large as the outer diameter of the shaft parts A, and the shaft parts A is held from each side to allow the close contact with the outer circumference of the shaft parts A and uniformly apply oil thereto. A cylindrical member 35 is lowered relative to a center shaft 29 by moving upper and lower sub actuators 33, and a rubber parts B to be set on the circumference of the tip of the center shaft 29 is pushed out to be fitted to the shaft parts A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention relates to the outer periphery of a shaft part,
The present invention relates to an oil applicator that applies oil to the outer periphery of a shaft component through which a mounting hole of a rubber component is slidably contacted when fitting a rubber component having a mounting hole.

[0002]

2. Description of the Related Art A drive shaft is assembled by fitting a rubber component B into a shaft component A as shown in FIG. 23 (see a similar technique in Japanese Patent Laid-Open No. 61-28433).
No. 2 publication). The rubber component B is formed with a mounting hole 1 that penetrates in the vertical direction in the figure, and the mounting hole 1 is the shaft component A.
The small-diameter portion 1a is fitted into the annular mounting groove 3 and is tapered so that the inner diameter gradually increases from the small-diameter portion 1a toward the upper side in the drawing.

The inner diameter of the small-diameter portion 1a of the rubber component B is substantially the same as or slightly smaller than the outer diameter of the mounting groove 3, so that the small-diameter portion 1a of the rubber component B passes through the portion having a larger diameter than the mounting groove 3. When this is done, since it does not easily enter due to frictional force, prior to the work of fitting the shaft component B on the outer periphery of the portion of the shaft component A from the shaft end to the mounting groove 3,
I try to apply oil.

Conventionally, the above-mentioned oil application work is performed as shown in FIG.
As shown in FIG. 4, an operator manually rolls the shaft component A placed on the oil-impregnated sponge 5.

[0005]

However, the following problems occur in such oil application work. (1) It is difficult to control the amount of oil applied, and a large amount of oil is required.

(2) Since the oil is applied by hand, the working environment is extremely bad because the hands are dirty.

(3) It is costly and impractical to implement a dedicated oil coating device that automates the oil coating operation.

Therefore, the present invention aims at automating the oil coating operation at low cost.

[0009]

In order to achieve the above object, the present invention firstly holds a rubber component having a mounting hole into which a shaft component is inserted and fitted, and an end portion of the shaft component. To the assembly unit that assembles the rubber component to the shaft component by moving closer to the axial component with respect to the rubber component in the shaft component in advance of the rubber component with the approach movement. Move on the fitting movement trajectory,
An oil application unit provided with an oil application member for applying oil is provided on the movement locus.

Secondly, in the first construction, the assembling unit is provided with a shaft portion in which a rubber component is fitted and set in the vicinity of the tip, and the shaft portion is provided on the main body frame.
Is mounted on a movable member that moves closer to the shaft component in the axial direction by the driving means, and the second driving means provided on the movable member is provided on the outer periphery of the shaft portion in the axial direction with respect to the shaft portion. A cylindrical member for moving and fitting a rubber part into the shaft part is provided, and the movable member is provided with an oil application unit. Thirdly, in the first configuration, the oil application member is a shaft part having a circular cross section. It is composed of a pair of rotating rollers having a semicircular recess having a semicircular cross section that is in close contact with the outer periphery of the roller.

Fourthly, in the third structure, the oil applying unit includes a pair of rotating arms having oil applying members made up of a pair of rotating rollers attached to the respective ends thereof. The oil application member is rotatable with respect to the shaft part in a direction toward and away from each other along the radial direction.

Fifth, an assembly unit holding a rubber component having a mounting hole into which a shaft component is inserted and fitted,
When the rubber part is assembled to the shaft part by moving the end part of the shaft part from the axial direction, the oil application member precedes the rubber part as the assembly unit moves closer to the shaft part. Then, there is provided an oil application method of moving on the movement locus of fitting of the rubber part component in the shaft part and applying oil on the movement locus.

[0013]

According to the first configuration, the second configuration, or the fifth method, the rubber component is moved to the assembly unit that is assembled to the shaft component as the assembly unit moves closer to the shaft component. Since an oil application unit equipped with an oil application member for applying oil to the outer periphery of the shaft part is provided, a dedicated oil application mechanism is not required, and automation of oil application to the shaft part can be achieved at low cost. .

According to the third structure, the recesses of the pair of rotating rollers are brought into close contact with the outer periphery of the shaft component, so that the oil is uniformly applied.

According to the fourth structure, after the work of applying the oil to the shaft part by the rotating roller is completed, the rotating arm is rotated to separate the rotating roller at the tip from the shaft part,
The application of oil to unnecessary parts is avoided.

[0016]

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

FIG. 1 is a schematic overall configuration diagram of an assembling machine having a built-in oil coating device according to an embodiment of the present invention. This assembling machine is for inserting a rubber component B into a shaft component A similar to that shown in FIG. 23, and is attached to the upper frame 9 and the lower frame 11 of the main body frame 7 in the assembly unit 13. Are provided to face each other, and each assembly unit 13 is provided with an oil application unit 15. Left and right side frames 17 and 19 are respectively interposed between the upper frame 9 and the lower frame 11, and the right side frame 19 in the drawing is illustrated.
A pair of grip claws 23 for gripping the shaft component A are provided at the tip of the arm 21 protruding from the arm 21.

The assembly unit 13 is a base plate as a movable member that moves up and down by a main actuator 25, which is a first driving means composed of hydraulic cylinders and the like mounted on the upper surface of the upper frame 9 and the lower surface of the lower frame 11, respectively. It is equipped with 27. A center shaft 29, which is a shaft portion, is mounted on the base plate 27 so as to project toward the shaft component A, and a tip end 29a thereof projects so as to be positioned (centering) in contact with the end of the shaft component A. Are formed. The small diameter portion 1a of the rubber component B is fitted and set around the vicinity of the tip 29a.

Sub plates 31 are arranged on opposite sides of each base plate 27. The sub plates 31 are composed of hydraulic cylinders and the like mounted on the upper frame 9 side and the lower frame 11 side of the sub plates 31. It moves up and down by the sub-actuator 33 which is the second driving means. A through hole 32 is formed in the center of the sub plate 31, and the center shaft 29 is formed in the through hole 32.
The outer periphery of the end of the cylindrical member 35, which is slidably inserted, on the base end side is fixed. The end of the cylindrical member 35 on the tip side is
The rubber component B reaches the vicinity of the small diameter hole 1a. The inner diameter of the cylindrical member 35 is set to be slightly larger than the outer diameter of the shaft part A. An auxiliary block 37 is attached to the rubber part B side of the sub plate 31.
The cylindrical member 35 is also inserted and fixed in the through hole 38 provided in the center of the.

On the base plate 27 side of the sub plate 31, a guide rod 41 that slidably penetrates both the base plate 27 and the boss member 39 mounted on the base plate 27 is mounted, and the operation of the sub actuator 33 is performed. Sub board 31 by
The vertical movement of the guide rod 41 is guided by the guide rod 41.

The oil applying unit 15 includes a slide base 4
3 are extendedly attached on the upper and lower base plates 27 at positions facing the main actuator 25 so as to face each other. This slide base 43 is provided on the left side of the body frame 7 in the figure. It slides vertically in FIG. 1 with respect to the guide portion 45 provided on the frame 17. As shown in detail in FIG. 2, a rail 46 extending in a direction orthogonal to the paper surface in FIG. 2 is mounted on the slide base 43 via a connecting member 47. As shown in FIG. 3 which is a view taken in the direction of arrow C in FIG. 2, a pair of connecting members 49 (49a, 49b) are arranged on the rail 46 so as to extend in a direction orthogonal to the rail 46. A slide 51 that slides on the rail 46 is attached to each of them.

2 and 3, the upper oil applying unit 15 is shown. The oil applying unit 15 on the lower side has the same structure as that of the upper oil applying unit 15 although it will be described on the upper side in the following description. is there.

An actuator 53 composed of a hydraulic cylinder or the like is mounted on the upper ends of the connecting members 49a and 49b. The main body 53a of the actuator 53 is attached to the side of the left connecting member 49b in FIG.
The tip of the actuating rod 53b that moves back and forth from is attached to the connecting member 49a on the right side in the drawing, and the pair of connecting members 49a and 49b move in the direction of approaching and separating from each other by the operation of the actuator 53.

A rack gear 55 (55a, 55a, 55a, 55a, 55a, 55a) extending parallel to the rail 46 is provided at the lower end of each connecting member 49a, 49b.
55b) are attached respectively. Rack gear 55
As shown in FIG. 4 which is a view taken in the direction of the arrow D of FIG. 2, the pinions 57 (57 a, 57 a) meshed with each other.
b) meshes, and each pinion gear 57a, 57b
Is a shaft 59 (5
9a, 59b) are rotatably mounted. Each of the shafts 59a, 59b is a disc-shaped auxiliary plate 61 (61a, 61a) arranged at the lower end of the shafts 59a, 59b.
It is fixed to the connecting member 47 with the bolt 63 (63a, 63b) together with b).

Rotating arms 65 (65a, 65b) extending toward the shaft component A side are provided with bolts 67 (67a, 67) on the lower surfaces of the pinion gears 57a, 57b, respectively.
It is fixed by b). The pivot arm 65 is formed with escape holes 69 (69a, 69b) that are aligned with the auxiliary plate 61, and the outer diameter of the auxiliary plate 61 is formed to be larger than the inner diameter of the pinion gear 57. The pinion gear 57, which is supported by the auxiliary plate 61 and the rotating arm 65, is supported by the shaft 59.
It will rotate around.

The tip of the rotating arm 65 bends upward,
On the front side of the bent portion 71, a sponge-like rotating roller 73 (73a, 73b) which is an oil applying member is provided with a pin 75.
It is attached via (75a, 75b). The rotating roller 73 has a pair of bearings 77 (77
a, 77b), which can be rotated and whose cross section is a shaft part A
The grooves 79 (79a, 79b) are formed over the entire circumference so as to have an arcuate shape having substantially the same diameter as the outer diameter. Bent portion 71
A nozzle 81 for supplying oil to the groove 79 of the rotary roller 73 is attached to the tip of the via a mounting member 83. The amount of oil supplied by the nozzle 81 is regulated by an oil meter (not shown) every cycle.

FIG. 5 is a more specific version of the above-described assembly machine. Here, the shaft part A is moved from the position of the process of performing the oil coating and the assembly process of the rubber part B shown in FIG. 1 to the groove formed at the end of the shaft part A by the central indexing machine 85. On the other hand, a mechanism for rotating a circlip having a C shape to the position of the step of fitting by the circlip assembling machine 87 is provided.

In the index machine 85, a pair of upper and lower arms 93 and two gripping claws 95 attached to the tips of the arms 93 are attached to a main shaft portion 91 rotated by a motor 89. Of these, for the shaft part A that is gripped by the right grip claw 95 in FIG. 5, as in the case of FIG.
Applying oil to the product and subsequent rubber parts B
Perform the assembly work of. On the other hand, the gripping claw 95 on the left side in FIG. 5 grips the shaft part for which the oil application work and the rubber part B assembly work have already been completed, and the circlip described above is assembled to this shaft part. wear.

On the side of the circlip assembling machine 87, FIG.
And a circlip feeder 97 as shown in detail in FIG.
Is arranged. The circlip feeder 97 is provided with a holding jig 105 to which a plurality of circlips 103 are fed from a parts feeder 99 via a feeding chute 101 and which holds one circlip 103 at the bottom in the drawing. Circlip 1 held by holding jig 105
03 is arranged so that the left side in FIG. 6 is a C-shaped opening. The holding jig 105 holds the circlip 103 by the holding cylinder 107 from opposite sides, and the holding cylinder 105 moves to the circlip assembling machine 87 by the supply cylinder 109 to release the holding at this position. Then, the circlip 103 falls by free fall onto the assembly jig 111 of the circlip assembly machine 87.

The assembling jig 111 is provided with a step portion 113 for accommodating the circlip 103, and the assembling cylinder 115.
Can move upward from the state of FIG.
A circlip 10 is provided in front of (above) the assembling jig 111.
An assembling guide 117 for assembling 3 into the shaft component A is arranged.

The assembly guide 117 has a taper shape such that the assembly jig 111 side has a small diameter and the shaft part A side located at the upper side in the figure has a large diameter, and the end on the large diameter side has a shaft part part. A projection 117a is provided so that positioning (centering) can be performed by contacting A. The protrusion 117a is biased forward in the protruding direction by a spring (not shown) incorporated therein. The assembly guide 117 can be moved in the vertical direction by an actuator 118 fixed to the body frame of the assembly machine via a connecting plate 119,
The assembling jig 111 is formed with a notch 121 that vertically penetrates so as not to interfere with the connecting plate 119 when moving upward.

The shaft part A for the circlip assembling machine 87
On the body frame on the opposite side (upper side in FIG. 5) of the shaft part A by an actuator 123 such as a hydraulic cylinder.
A support shaft 125 is provided which is capable of moving forward and backward with respect to and supports the end of the shaft part A.

Next, the operation of the oil coating device as described above will be described. FIGS. 8 to 13 show steps of applying oil to the shaft part A and assembling the rubber part B. FIG. 8 shows a state where the rubber part B is set around the tip of the center shaft 29 in the assembly unit 13. Actuator 53 of oil application unit 15
Drives the connecting members 49a and 49b to be further apart from the state of FIG. 3, whereby the rotating arms 65a and 65b and the rotating rollers 73a and 7b.
3b is rotated from the state of FIG. 4 in the direction away from each other. Further, the nozzle 8 is
Oil is supplied from 1.

From the state shown in FIG. 8, the actuator 53 of the oil applying unit 15 is operated so that the connecting members 49a, 49b approach each other and reach the state shown in FIG. 3, whereby the rotating arms 65a, 65b and Rotating roller 73
a and 73b are in the state shown in FIG. 4 (see FIG. 9). From this state, by driving the upper and lower main actuators 25, the assembling unit 13 moves together with the oil applying unit 15 such that the upper one moves down and the lower one moves up. By the above movement of the assembling unit 13, the projection 29a at the tip of the center shaft 29 enters the recess formed at the center of the end of the shaft part A for centering, and the oil applying unit 15 also moves at the same time.
As shown in FIG. 10, the rotating roller 73 moves in the same direction while rolling on the shaft component A while the shaft component A enters the groove 79 and is in close contact with the shaft component A to apply the impregnated oil to the shaft component A ( (See FIG. 10).

In the oil application process as described above,
The shaft part A can be positioned (centering) reliably,
Since the rotating roller 73 having the groove 79 having a curvature matching the outer peripheral shape of the shaft component A in the positioned state applies oil while rolling on the outer periphery of the shaft component A, uniform coating is possible over the entire circumference. The amount of oil is minimal. After the oil is applied to the shaft part A, as shown in FIG. 11, the actuator 53 of the oil applying unit 15 is moved to the connecting member 4
The rotation rollers 73a and 73b are moved in directions away from each other by driving the 9a and 49b to move away from each other.

Next, by operating the sub-actuator 33 of the assembling unit 13, the cylindrical member 35 fixed to the sub-plate 31 is projected and moved toward the shaft part A as shown in FIG. By this protruding movement, the tip of the cylindrical member 35 pushes out the rubber component B and fits it into the shaft component A from the small diameter portion 1a side. This fitting operation is performed until the small diameter portion 1a of the rubber component B enters the mounting groove 3. At this time,
The shaft part A enters into the cylinder of the cylindrical member 35. The fitting operation described above is easy because the oil is evenly applied to the shaft part A.

After that, the sub-actuator 33 is operated to return the cylindrical member 35 to the original state, and the main actuator 2
5, the assembly unit 13 is moved to the oil application unit 1
By returning to the original position shown in FIG. 8 (FIG. 1) together with 5, the assembling of the rubber component B to the shaft component A is completed (see FIG. 13).

The operation of the oil applying unit 15 and the operation of the assembling unit 13 shown in FIGS. 8 to 13 are performed simultaneously in the vertical direction, whereby the work of assembling the rubber component B to both ends of the shaft component A is performed. Is completed.

Shaft part A with rubber part B assembled
Is driven by the motor 89 of the index machine 85, the main shaft portion 91 rotates from the state of FIG. 13 to the state of FIG. 14, and moves to a position near the circlip assembling machine 87.
Move to the circlip assembling process. That is, by operating the indexing machine 85 from the state of FIG. 13 so that the two left gripping claws 95 and the two right gripping claws 95 in FIG. 13 are interchanged, as shown in FIG. The shaft part A is moved to the position of the circlip assembling machine 87. In FIG. 13, the grip claw 95, which was located near the circlip assembling machine 87, moves to a position aligned with the center shaft 29 to prepare for a grip operation for the next shaft component.

In FIG. 15, the support shaft 125 is lowered and at the same time, the assembling guide 117 is raised to support the shaft component A having the rubber component B assembled from both ends for centering. FIG. 16 shows an assembling work state of the circlip 103 using the circlip feeder 97 and the circlip assembling machine 87 shown in FIG.
7 shows a state after the circlip 103 is assembled.

The circlip 103 is assembled from the holding jig 105 in advance in the state shown in FIG. 13, that is, after the rubber component B is assembled in FIG. 12 and before the indexing machine 85 is operated. It is supplied to 111. The supply operation of the circlip 103 is shown in FIGS. FIG. 18 shows the supply cylinder 10.
9 is operated to extend the holding jig 105 between the assembling jig 111 and the assembling guide 117. When the holding jig 105 releases the holding of the circlip 103 in this state, the circlip 103 falls on the step portion 113 of the assembly jig 111 by its own weight, and then the holding jig 10
5 is retracted to shift to the next circlip holding operation (see FIG. 19).

The state of FIG. 19 in which the circlip 103 is supplied to the holding jig 111 corresponds to the state of FIG. After operating the index machine 85 from this state,
The state of FIG. 15 after the assembling guide 117 is raised to center the shaft component A corresponds to the state of FIG.

From the state shown in FIG. 20, the actuator 11
5 is operated to raise the assembly jig 111. During this ascending process, the assembling guide 117 enters the assembling jig 111, and the connecting plate 119 makes the notch 1 of the assembling jig 111.
While passing through 21, the circlip 103 is guided and expanded by the tapered shape of the assembly guide 117, and finally fitted into the groove on the end side of the shaft part A (see FIG. 21). After that, as shown in FIG. 22, the actuator 115 is operated to lower the assembly jig 111, and further, as shown in FIG.
Is operated to lower the assembling guide 117, whereby the assembling process of the circlip 103 is completed.

The shaft part A, for which the assembly process of the circlip 103 has been completed, is removed from the grip claws 95 while
A new shaft part is gripped by the right grip claw 95 to assemble a rubber part.

According to the above-described oil application device, the shaft component A is set in the assembly unit 13 and is provided in the assembly unit 13 prior to the work of assembling the rubber component B into the shaft component A. By the oil application unit 15, the oil application to the outer peripheral portion of the shaft part A can be automated, and the dedicated equipment for oil application is unnecessary.

[0046]

As described above, according to the first, second or fifth invention, the assembly unit for assembling the rubber component to the shaft component is moved closer to the shaft component. Since an oil application unit equipped with an oil application member that moves along with the oil to apply oil to the outer circumference of the shaft part is provided, automation of oil application to the shaft part can be reduced without providing a dedicated oil application mechanism. This can be achieved at low cost, and this automation can achieve uniform application of the oil, and requires less oil.

According to the third aspect of the invention, since the oil application work is performed by the recesses of the pair of rotating rollers being in close contact with the outer circumference of the shaft component, the application of oil to the shaft component can be made more uniform. You can

According to the fourth aspect of the invention, after the work of applying the oil to the shaft component by the rotating roller is completed, the rotating arm rotates so that the rotating roller at the tip of the rotating arm separates from the shaft component. Therefore, it is possible to avoid applying oil to unnecessary portions of the shaft part, and it is possible to minimize the oil consumption.

[Brief description of drawings]

FIG. 1 is a schematic overall configuration diagram of an assembly machine incorporating an oil coating device according to an embodiment of the present invention.

FIG. 2 is an enlarged detailed view of a main part of FIG.

FIG. 3 is a view on arrow C in FIG.

FIG. 4 is a view on arrow D of FIG.

5 is an overall configuration diagram in which the assembling machine in FIG. 1 is more specifically embodied.

FIG. 6 is a detailed view of the circlip assembling machine and the circlip supplying machine in FIG.

FIG. 7 is a top view of FIG.

8 is an operation explanatory view showing a state where a rubber component is set to a shaft component in the assembly machine of FIG.

9 is an operation explanatory view showing a state where rotating rollers are brought close to each other in the assembly machine of FIG. 5;

10 is an operation explanatory view showing a state in which oil is applied to a shaft part in the assembly machine of FIG. 5;

FIG. 11 is an operation explanatory view showing a state where the rotating rollers are separated from each other in the assembly machine of FIG. 5;

FIG. 12 is an operation explanatory view showing a state where the rubber component is assembled to the shaft component in the assembly machine of FIG. 5;

FIG. 13 is an operation explanatory view showing a state in which the work of assembling the rubber component to the shaft component in the assembly machine of FIG. 5 is completed.

14 is an operation explanatory view showing a shift from a process of assembling a rubber component to a shaft component to a process of assembling a circlip in the assembly machine of FIG.

FIG. 15 is an operation explanatory view showing a state where centering is performed on a shaft part in the assembly machine of FIG. 5;

16 is an operation explanatory view showing a state where a work of assembling a circlip to a shaft component in the assembly machine of FIG. 5 is being performed.

FIG. 17 is an operation explanatory view showing a state where the work of assembling the circlip to the shaft part in the assembly machine of FIG. 5 is completed.

FIG. 18 is an operation explanatory view showing the work of supplying the circlip to the assembling jig in the circlip feeder of FIG. 6.

FIG. 19 is an operation explanatory view showing a state in which the circlip is supplied to the assembling jig in the circlip feeder of FIG. 6.

20 is an operation explanatory view showing a state where the assembly guide is raised in the circlip feeder of FIG. 6 to perform centering on the shaft part.

21 is an operation explanatory view showing an operation of assembling the circlip to the shaft part by raising the assembling jig in the circlip feeder of FIG. 6. FIG.

22 is an operation explanatory view showing a state in which the circlip is assembled to the shaft part in the circlip feeder of FIG.

FIG. 23 is an exploded perspective view of a shaft part and a rubber part assembled to the shaft part.

FIG. 24 is an operation explanatory view showing a method of applying oil to a shaft part according to a conventional example.

[Explanation of symbols]

 A shaft component B rubber part 1 mounting hole 7 body frame 13 assembly unit 15 oil application unit 25 main actuator (first drive means) 27 movable member 29 center shaft (shaft part) 33 sub-actuator (second drive means) ) 35 cylindrical member 65 rotating arm 73 rotating roller (oil application member) 79 recess

Claims (5)

[Claims] 1. A rubber component having a mounting hole into which a shaft component is inserted and fitted is held, and the rubber component is moved toward the end of the shaft component in the axial direction to move the rubber component. Along with the approaching movement to the assembly unit to be attached to the assembly unit, an oil application member that moves on the fitting movement locus of the rubber component in the shaft component prior to the rubber component and applies oil on this movement locus. An oil application device comprising an oil application unit including a. 2. The assembly unit includes a shaft portion in which a rubber component is fitted and set near the tip, and the shaft portion is
It is mounted on a movable member that moves closer to the shaft component in the axial direction by the first drive means provided on the body frame,
A cylindrical member is provided on the outer periphery of the shaft portion so as to fit the rubber component into the shaft component by moving the movable member in the axial direction with respect to the shaft portion by the second driving means provided on the movable member. The oil application device according to claim 1, further comprising an oil application unit. 3. The oil applying member according to claim 1, wherein the oil applying member is composed of a pair of rotating rollers provided with a concave portion having a semicircular cross section which is in close contact with the outer periphery of the shaft part having a circular cross section. apparatus. 4. The oil applying unit comprises a pair of rotating arms each having an oil applying member consisting of a pair of rotating rollers attached to the tip thereof. The oil application device according to claim 3, wherein the oil application device is rotatable along the radial direction in a direction of approaching and separating from each other. 5. An assembly unit holding a rubber component having a mounting hole into which the shaft component is inserted and fitted is moved in the axial direction toward the end of the shaft component to move the rubber component to the shaft component. At the time of assembling, as the assembling unit moves closer to the shaft part, the oil application member moves ahead of the rubber part on the fitting movement track of the rubber part part of the shaft part and moves on this movement track. A method for applying oil, which comprises applying oil to the.