JPH0326427A - Supply of cylinder parts and its device - Google Patents

Abstract

PURPOSE:To carry out press fitting of parts efficiently by rotating a cylinder part so as to engage a positioning projection of a press-in rod with a positioning groove of the cylinder part, and delivering the cylinder part positioned against the press-in rod. CONSTITUTION:A cylinder part P such as a bearing is pressurized by a part pressurizing member 120a through a spring member 139a, and a pin member 136a which is rotated with the pressurizing member 120a is engaged with a groove part 302 of the part P so as to rotate the part P. When the groove part on the other side part of the part P accords with a projection part 316a of a press-in rod 312a, they are engaged with each other. When they are engaged, rotation of the part P is stopped. Then, the press-in rod 312a is displaced to the press-fitted member side, and the cylinder part P positioned and held by the press-in rod 312a is press-fitted to a predetermined press-fit position. Thus, press fitting of the cylinder parts can be executed efficiently and with accuracy.

Description

[Detailed Description of the Invention] [Industrial Application Field 1] The present invention relates to a method and apparatus for supplying cylindrical parts,
More details 1:' is a method for supplying cylindrical parts that makes it possible to supply parts such as bearings automatically and at a desired angular position to the press-in port for press-fitting the cylindrical parts into the press-fitted member. and regarding its equipment.

[Prior Art] For example, it is common practice to automatically press-fit parts such as bearings and bushings into press-fitted members such as casings. That is, the parts sequentially conveyed from the parts feeder are positioned and held at predetermined positions, and after these parts are fed to the press-in port rod, the press-fit rod is moved relatively close to the press-fit member. By squeezing, they are actively working on the parts concerned.

By the way, in some parts of this type, for example, an oil hole is provided corresponding to the oil hole of the press-fitted member, and in this case, the hole and the oil hole are aligned. It is necessary to press-fit the part into the resident member.Therefore, various devices have been proposed in the past that automatically perform phase alignment of the part with respect to the press-fit member.
For example, the technique is disclosed in Japanese Utility Model Application Publication No. 62-98621.

[Problems to be Solved by the Invention (7)] However, in the above-mentioned prior art, the part is positioned and held in the press-fit head under the expanding action of the sphere that engages with the elastic body, but this fE When the human head is moved to the part press-fitting position, the part rotates and there is a high risk that the burnt position will change.

Furthermore, when a part is press-fitted into a press-fitted member, there is a risk that the part may rotate due to local differences in press-fitting resistance.

As a result, it has been pointed out that the part is press-fitted into the press-fitted member without communication between the oil hole of the press-fitted member and the hole of the part, resulting in an inconvenience in that the efficiency of the part press-fitting work cannot be achieved.

The present invention has been made in order to solve the above-mentioned problems, and by fitting a press-fitted positioning protrusion into a positioning groove formed in a cylindrical part, The cylindrical part can be accurately held at the desired angular position relative to the press-fitting rod, and the cylindrical part can be press-fitted into the press-fitted member with high precision and dynamically through the press-fitting rod. The purpose is to provide a method for supplying cylindrical parts.

Furthermore, the present invention is configured to rotate the cylindrical part while pressing the cylindrical part cut into the press-in port rod, thereby inserting the positioning protrusion of the press-fitting rod into the positioning groove of the cylindrical part. It is an object of the present invention to provide a feeding device for cylindrical parts that can be mechanically and reliably fitted and can perform efficient parts press-fitting work.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a method for positioning and supplying a cylindrical part to a press-fitting rod that press-fits the cylindrical part into a press-fitted member, The positioning groove formed in the cylindrical part is directed toward the press-fitting rod, and the cylindrical part and the press-fitting rod are arranged coaxially, and then, while the cylindrical part and the press-fitting rod are brought into pressure contact with each other, the cylindrical part and the press-fitting rod are The part is rotated to fit the positioning protrusion of the press-fitting rod into the positioning groove of the cylindrical part, and the cylindrical part is positioned with respect to the press-in port rod and sent out.

The present invention also provides an apparatus for positioning and supplying a cylindrical part to a press-fitting rod for press-fitting the cylindrical part into a press-fitted member, the positioning groove formed in the cylindrical part being inserted into the press-fitting rod. The cylindrical part has a accommodating part in which the cylindrical part is placed facing toward the side, and includes a holding unit that can move forward and backward at least in the axial direction of the press-fit rod, and a part delivery mechanism that is attached to the holding unit, and the part The delivery mechanism includes: a pressing member disposed coaxially with the cylindrical part in the storage section; a first driving means for pressing the cylindrical part toward the press-fitting rod via the pressing member; a second for rotating the intervening cylindrical part and fitting the positioning protrusion of the press-fit rod into the positioning groove of the cylindrical part;
and a driving means.

[Operation] In the method for supplying cylindrical parts according to the present invention, which includes the above-described steps, the positioning protrusion of the press-fit rod fits into the positioning groove of the cylindrical part, and the cylindrical part is attached to the press-fit rod. The cylindrical part is locked and held at a desired angle by the press-fitting rod.

Further, in the cylindrical part supplying device according to the present invention configured as described above, after the cylindrical part is placed in the housing part and the holding unit is moved toward the press-fitting rod side, the first and second drives Under the action of the means, the cylindrical part is rotated while being pressed by the press-fitting rod. Then, when the positioning groove of the cylindrical part and the positioning protrusion of the press-fit rod match, the cylindrical part moves toward the press-fit rod, the protrusion fits into the groove, and the cylindrical part It is positioned and held at a predetermined angle with respect to the injection port.

[Example] Next, an example will be given in relation to a device for carrying out the method for supplying cylindrical parts according to the present invention,
A detailed description will be given below with reference to the accompanying drawings.

In FIGS. 2 and 3, reference numeral IO indicates a parts supply device according to this embodiment. The parts supply device 10
has a frame l2 which is bolted onto the respective strut 13aS13b. The frame 12 has a set of guide rails 14a oriented in the eight directions of arrows.
14b, one end of a stay 16 is fixed to the upper part of the frame 12, and a transport mechanism 18 is provided at the other end of the stay 16 extending in the eight directions of the arrows.

A holder 20 constituting the transport mechanism 18 has its intermediate portion fixed to the stay 16 and extends in the direction of arrow B. A hole 22 is formed through the holder 20 in the longitudinal direction. Ru. The holder 20 has parts introduction ports 26a and 26b that have a rectangular cross section and are inclined with respect to the vertically upward direction in order to insert the parts P conveyed from a parts feeder (not shown) through a chute 24, and the parts Parts outlet ports 28a and 28b for dropping and supplying P to a parts holding unit to be described later are formed so as to communicate with the hole 22.

A rotating body 30 fits into the hole 22, and this rotating body 30
Openings 32a, which can freely communicate with the parts inlets 26a, 26b and the parts outlets 28a, 28b, are provided at both end edges of the
32b is formed diametrically through. In this case, opening 3
2a and 32b are selected to have dimensions that can accommodate a single part P, and a cylinder 36 engages with one end portion of the rotating body 30 exposed to the outside via an arm 34. The cylinder 36 has a foot. − −− ． 1!1112, and a piston rod 38 extending therefrom engages with the arm 34.

Furthermore, on the lower side of the stem 16, there is a support arm, which will be described later.
A cam plate 42 constituting a drive mechanism 40 for opening and closing is attached.

Next, a holding unit 144 is disposed on the frame 12 so as to be movable forward and backward in the directions of arrows A and B. In other words, Iki Frei L. A shift cylinder 46 is attached to 12, and a piston rod 48 extends from this shift cylinder 46.
A movable base 50 is fixed to the movable base 50, and the movable base 50 is placed on the guide rails 14a and 14b. The movable table 50 has a set of parallel guide bars extending in the direction of arrow B.
52a and 52b are provided, a cylinder 54 is engaged between these, and a unit main body 58 is engaged with a piston rod 56 extending therefrom (see FIG. 4).

The unit main body 58 has cylindrical bodies 60a and 60b into which guide bars 52a and 521) are fitted.

A pair of rectangular cylinders 62a and 62b are provided in the unit main body 58 so as to be freely disposed vertically below the parts guiding ports 28a and 28b which guard the transport mechanism 18.
, 62b have passages 64a, 64 extending vertically downward.
The lower parts of the passages fi4a and 64I) communicate with parts storage portions 66a and 66b.

A parts storage portion 66a is provided at the lower end of the rectangular cylinders 62a and 62b.
, 66b are formed to communicate with the openings 68a and 68b,
This opening 68a. , 68b), the parts support mechanisms 70a, 70l) face one end side. That is, the parts support mechanism 7
0a, as shown in the fifth leap, the parts support mechanism 70a has a - pair of support arms 72a, 72a.
42 sides of the support arms 72a, 72a are swingably supported by the rectangular tube body 62a by the bins 74a, 74a. The support arms 72a, 72a are provided with the bins 74a.
, 74a, both ends of a spring member 76a are engaged, and under the tension of the spring member 76a, the support arms 72a, ? The lower sides of 2a are biased toward each other. Here, the support arm 72a, ? At the bottom of each part 2a, circular openings having a diameter slightly smaller than the outer diameter of the part P are defined, and arcuate connecting parts 78a and 78a are formed which extend into the open part 68a. . On the other hand, the upper portions of the support arms 72a, 72a are provided with locking portions 80a, 80 that are spaced apart from each other at a predetermined distance and protrude in two vertical directions.
a is provided, and the drive mechanism 4 is provided at the locking portions 80a, 80a.
0 is engaged.

The drive mechanism 40 has a rod 82a that is slidably fitted into the unit main body 58, and a spring member 84a is interposed between the rod 82a and the unit main body 58 to vertically move the rod 82a. ” Forces in two directions. A rotating body 86a is disposed above the rod 82a, and this rotating body 86a engages with the cam plate 42 described above. Rod 82a
An opening/closing claw R8a having a bent shape is provided at the lower part of the opening/closing claw R8a.
Is there a support arm at the end of this opening/closing claw 88a? 2a, 7
A tapered surface 89a that slides into contact with the locking portions 80a, 80a of 2a.
, 89a are formed.

Although the configuration of the parts support mechanism 70a has been described above, the same reference numerals are given to the same components of the parts support mechanism 70b, and detailed explanation thereof will be omitted.

A parts delivery mechanism 90a faces the other end side of the opening 68a of the rectangular cylinders 62a, 62b. A bracket 92a constituting the parts delivery mechanism 90a is fixed to the rectangular cylinder 62a, and a drive boo 'J9 is attached to one end of the bracket 92a.
4a is fitted externally. As shown in Figures 1 and 6, the drive Boo! A southern part 96a is provided on one side of J94a, and the driving pulley 94a is rotationally driven via rotational driving means 97.

That is, the rotary drive means 97 includes a rotary drive source 98, a belt 102 is stretched around a boule lOO connected to the rotary drive source 98, and one end of this bell 102 is engaged with a drive pulley IJ94a. .

Next, the teeth 106a of the clutch member 104a mesh with the teeth 96a of the drive boob IJ94a, and a spline hole 108a is formed in the center of the clutch member 104a.
is formed, and this spline hole 108a, the drive boo IJ
A rotating cylinder 110a is disposed within the bracket 94a and the bracket 92a. A spline 114a is formed at one end of the rotating cylinder 110a, and the spline 114a is fitted into the spline hole 108a of the clutch member 104a and is engaged with the locking member 116a. The locking member 116a
A spring member 118a is interposed between the clutch member 104a and the drive boot tJ94.
Press it to side a.

On the other hand, a substantially cylindrical parts pressing member 120a is attached to the other end of the rotating cylinder 110a. As shown in FIG. 6, the parts pressing member 120a is substantially connected to a first cylindrical body 119a that is attached to the rotary cylinder 110a.
A second cylindrical body 123a is integrally fixed to the cylindrical body 119a via a bolt 121a. A parts pressing end surface 122a is provided on one side of the second cylindrical body 123a, and four guide grooves 124a extending in the axial direction are formed at equal angular intervals on this end surface 122a. Furthermore, four dog portions 125a are formed on the outer peripheral portion of the first cylindrical body 119a and project toward the rotary cylindrical body 110a at equal angular intervals (actually, 90° intervals).
5a drives a proximity switch 127a fixed vertically downward to the bracket 92a (see FIG. 1). Note that a spring member 126a is disposed between the first cylindrical body 119a and the bracket 92a.

Furthermore, a rod 128a is arranged inside the rotating cylinder 110a and the locking member 116a, and this rod 128a is a parts pressing member! A plate body 130a is engaged with the end portion of the rotary cylinder body Ll. A spring member 132a is interposed between Oa and Oa. Four holes 134a are formed in the plate body 130a corresponding to the guide grooves 124a of the parts pressing member 120a, and a parts indexing bin member 136a is fitted into the holes 134a. The outer peripheral surface of the pin member 136a is cut out to form a flat plate portion 138a that substantially fits into the guide groove 124a, and the pin member 136
A spring member 139a is interposed between the end face of a and the inner wall face of the parts pressing member 120a.

Therefore, the parts pressing member 12
0a and the bottle member 136a toward the part P side is provided in the unit main body 58. As shown in FIG. 3, the advance/retreat drive means 14
0a has an actuator, for example, a cylinder 141a, and a swing plate 144a engages with a piston rod 142a extending from the cylinder 141a.
a is engaged with the rotating shaft 146a.

One end of an arm member 148a is engaged with the rotating shaft 14.6a, and the other end of the arm member 148a extending downward from the rotating shaft 146a has a substantially U-shape and is engaged with the locking member 116a. A matching lever 150a is formed.

On the other hand, a parts delivery mechanism 90b faces the opening 68b of the rectangular cylinder 62b. This parts delivery mechanism 90b is constructed in the same manner as the parts delivery mechanism 90a described above, and the same structural elements are given the same reference numerals with the suffix b, and detailed explanation thereof will be omitted. In this case, the parts delivery mechanism 9
A rotary drive source 98 is attached to the drive boo IJ94b that constitutes 0b.
A belt 10 stretched over a bouri 100 connected to
The two ends are engaged.

As shown in FIG. 3, the part P is provided with an oil hole 300, and positioning grooves 302 are formed on both side surfaces of the part P. Furthermore, small diameter parts 314a and 314b for fitting parts and a protrusion 316a1316b that fits into the groove 302 are formed at the end of the press-fitting rod 312a%312b for press-fitting the part P into a press-fitted member (not shown). .

The parts supply device according to this embodiment is basically constructed as described above, and its operation will be explained next.

First, when parts P are fed from a parts feeder (not shown) to the transport mechanism 18 via the chute 24, the parts P are accommodated one by one in the respective openings 32a and 32b via the parts introduction port 26a126b. Ru. Therefore,
Under the driving action of the cylinder 36, the piston rod 38 is displaced in the direction of the arrow in FIG. The parts P housed in the square cylinders 62a, 62b are dropped into the passages 64a, 641].

Below, the parts support mechanism 70a and the parts delivery mechanism 90
To explain a, the parts P supplied to the passage 64a as described above are arranged in the parts storage section 668. At that time, support arms facing both ends of the opening 68a? 2a,
? Both sides of the part P are held by the arc-shaped locking portions 78a, 78a of 2a and the part pressing member 120a 1.Therefore, a unit that drives the cylinder 54 and is secured to the piston mouth end 56 extending from the cylinder 54. The unit main body 58 is positioned by displacing the main body 5B to the left in FIG. 4 under the guiding action of the guide bars 52a and 52b.

As a result, the axes of the part P disposed in the parts storage portion 66a and the press-fitting head 312a are aligned.

Next, the shift cylinder 46 is driven so that the guide rail 14
The movable table 50 is moved to the press inlet rod 3 under the guiding action of a and 14b.
12a side, the rotating body 86a constituting the drive mechanism 40 engages with the thick portion side of the cam plate 42, and the lug 82a descends against the elastic force of the spring member 84a. Therefore, the tapered surfaces 89a, 89a of the opening/closing claw 88a are the support arms 72a, ? The support arms 72a, ? 2a is the locking part 78a, 7
8a side is oscillated in the direction in which it is moved apart (see the two-dot chain line in FIG. 5).
The small diameter portion 314a of A faces into the rectangular cylinder 62a from the opening 68a through the gaps between the respective locks B'l8a and 78a, and the part P is fitted externally into the press inlet port 312a. While stopping the driving of the shift cylinder 46, the cylinder 141a constituting the forward/backward driving means 140a of the parts feeding mechanism 'JOa is driven to move the piston rod 142a.
is displaced outward, and the rotating shaft 146a is rotated via the swing plate 144a that engages with the swing plate 144a.

The T-arm member 148a that engages with the rotating shaft 146a displaces the lever 150a formed on its lower end side toward the press-fitting rod 312a, so that the lever 150a
The locking member 116a and the rotating cylinder 110a that are engaged with each other move integrally toward the press inlet port 312a. Therefore, the end surface 122a of the parts pressing material 120a, which is still attached to the rotary cylinder 110a, presses one side surface of the part P, and the spring member 139a, which engages with the inner wall surface of the parts pressing member 120a, presses one side surface of the part P. Bin member 1 under the explosive charge
36a presses one side of the part P (see FIG. 7a).

In such a state, the rotary drive source 98 constituting the rotational drive means 97 is driven to rotate the booley 100 in a predetermined direction, and the drive booley 100 is rotated through the belt 102 that engages with it. Rotate J94a. Said driving boo! The rotation of J94a is transmitted to the clutch member 104a through the respective clutch members 96a and 106a, and the rotating cylinder 110a rotates through the spline 114a that fits into the spline hole 108a of the clutch member 104a.

Therefore, the parts pressing member 120a and the bottle member 136a
rotate integrally, and one of the bin members 136a
When the part P is fitted into the groove 302 formed on one side of the part P, the part P rotates under the locking action of the bottle member 136a (see FIG. 7h). Then, the groove 302 formed on the other side of the part P
The part P moves toward the press inlet rod 312a at a position that matches the protrusion 316a formed on the inlet rod 12a, and the protrusion 316a fits into the groove 302 (see FIG. 7C).

Here, since the rotation of part P is stopped, the bottle part +4
Load is applied to 136a~, parts pressing member 120ad
At f2, the clutch member 104a that rotates the rotating cylinder 110a slides toward the locking member 116a against the elastic force of the spring member 118a. As a result, the tooth portion 106a of the clutch member 104a separates from the m portion 96a of the drive pulley 94a, and the rotational force of the drive pulley 94a is no longer transmitted to the rotary cylinder 110a. For this reason, as shown in FIG.
5a reaches vertically upward, and the proximity switch 127a is driven. By continuously driving the proximity switch 127a for a predetermined period of time, it is automatically and accurately determined that the part pressing member 120a is not rotating, that is, the part P is positioned and loaded on the press-fitting rod 312a. is detected, and the rotational drive source 98 is deenergized.

After the part P is positioned and loaded into the press-in port 312a in this way, the cylinder 141a is driven to swing the arm member 148a away from the press-fit rod 312a, and the part pressing member 120a is moved away from the part P. make them leave.

Further, the shift cylinder 46 is driven to displace the movable table 50 in a direction away from the press-fitting rod 312a, and then the cylinder 54 is driven to move the unit body 58 to the right in FIG. 4 and position it. On the other hand, under the action of an actuator (not shown), the press-fitting rod 312a is displaced toward the press-fitted member (not shown), and the press-fitting rod 312a is moved toward the press-fitted member (not shown).
The part P held in is press-fitted into a predetermined press-fitting site.

In this case, according to the present embodiment, the rod 312a is press-fitted into the positioning groove 302 formed in the part P corresponding to the position of the oil hole 300 provided in the part P.
The part P is held at a predetermined angular position by fitting the positioning protrusion 316a onto the press inlet rod 312a. Therefore, when the press-fitting rod 312a is moved toward the press-fitted member (not shown), the part P moves between the groove 302 and the protrusion 3.
16a, the part P is prevented from rotating under the locking action of the part P, so that the part P is always accurately press-fitted into the press-fitted member. Moreover, even if there is a partial difference in the press-fit resistance pile when press-fitting the bar P, this part P
There is no risk that the oil hole 1300 will not communicate with the oil hole of the press-fitted member due to rotation. By this, part P
The effect is that it is possible to carry out the large-scale work efficiently and with high precision.

Further, in this embodiment, the part P is rotated via the pin member 136a under the action of the rotational drive means 97 while the part pressing member 120a presses the part P toward the press-fitting rod 312a under the action of the forward/backward drive means 140a. ing. Therefore, the groove portion 302 of the part P and the press inlet port 312a
When the protrusion 316a of the part P is aligned with the protrusion 316a of
a fits. As a result, the part P can be automatically and accurately positioned with respect to the press-in port 312a, and the press-fitting operation of the part P can be smoothly performed.

[Effects of the Invention] The method for supplying cylindrical parts according to the present invention, which includes the steps described above, has the following effects.

A positioning protrusion formed on the press-fitting rod fits into a positioning groove formed on the cylindrical part, and the cylindrical part is locked at a predetermined angular position with respect to the press-in port rod. Therefore, when moving the press-fitting rod toward the press-fitted member, it is possible to prevent the cylindrical part from rotating relative to the press-fitting rod. This makes it possible to always maintain the cylindrical part at a predetermined angular position and press-fit it into the press-fitted member automatically and with high precision.

Furthermore, the cylindrical part feeding apparatus according to the present invention configured as described above has the following effects.

Under the action of the first driving means and the second driving means, the cylindrical part can be efficiently and reliably fed out to the press-fitting rod at a predetermined angular position, and the press-fitting operation of the cylindrical part can be performed with high precision. becomes possible.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a main part of a parts supply device according to the present invention, FIG. 2 is a perspective view of the parts supply device, FIG. 3 is a partially sectional side view of the parts supply device, and FIG. The figure is a front view of the parts supply device, FIG. 5 is an explanatory diagram of the parts support mechanism that constitutes the parts supply device, and FIG. 6 is an exploded view of the main parts of the parts delivery mechanism that constitutes the parts supply device. The perspective view and FIG. 7 are explanatory views of the operation when the parts supply device feeds the panni to the press-fitting rod. ■0...Parts supply device 1B...Transportation mechanism shrine/
...Holding unit 58...Unit main body 70a
, 70b... Parts holding mechanism 90a, 90b... Parts delivery mechanism 94a, 94b... Drive pulley 97... Rotation drive means 104a, l04b... Clutch member 110a,
110b---Rotating cylindrical body 120a, 120b...Parts pressing member 136a, 1
36b--Bin members 140a, 140b--Advancing/retracting drive means (other names FI0.5

Claims (6)

[Claims] (1) A method of positioning and supplying a cylindrical part to a press-fit rod that press-fits the cylindrical part into a press-fit member, the method comprising: directing a positioning groove formed in the cylindrical part toward the press-fit rod; the cylindrical part and the press-fit rod are arranged coaxially, and then the cylindrical part is rotated while the cylindrical part and the press-fit rod are brought into pressure contact, and the press-fit rod is positioned in the positioning groove of the cylindrical part. A method for supplying a cylindrical part, comprising fitting the cylindrical part with a projection, positioning the cylindrical part with respect to a press-fitting rod, and feeding the cylindrical part. (2) A device for positioning and supplying a cylindrical part with respect to a press-fitting rod that press-fits the cylindrical part into a press-fitted member, the positioning groove formed in the cylindrical part being directed toward the press-fitting rod. a holding unit that is movable forward and backward in the axial direction of the press-fit rod; and a parts delivery mechanism attached to the holding unit; a pressing member disposed coaxially with the cylindrical part in the section; a first driving means for pressing the cylindrical part toward the press-fitting rod via the pressing member; a second for fitting the positioning protrusion of the press-fit rod into the positioning groove of the cylindrical part by rotating the
A feeding device for cylindrical parts, comprising: a drive means; (3) In the device according to claim 2, the pressing member fits into a positioning groove formed on one end side of the cylindrical part, and rotates the cylindrical part under the action of the second driving means to rotate the cylindrical part. One or more pin members for fitting the positioning protrusion of the press-fit rod into the positioning groove formed on the other end side of the shaped part are arranged so as to be movable forward and backward via an elastic body. Feeding device for cylindrical parts. (4) In the device according to claim 2 or 3, the second driving means includes: a rotating body that is rotationally driven; a clutch member that can freely engage with the rotating body; and a pressing member that is coaxially attached and integrated with the clutch member. A feeding device for cylindrical parts, comprising: a rotary shaft that rotates freely and can move forward and backward; (5) In the device according to claim 4, the pressing member is provided with one or more dog portions, and a sensor driven by the dog portion is provided, and the sensor is continuously operated for a predetermined period of time via the dog portion. 1. A feeding device for cylindrical parts, characterized in that it is configured to detect that a positioning protrusion of a press-fit rod is fitted into a positioning groove of a cylindrical part by being driven by the cylindrical part. (6) The apparatus according to claim 2, wherein the first driving means includes an actuator that moves the rotating shaft equipped with the pressing member forward and backward relative to the press-fitting rod.