JPS5834728A - Assembly device with automatic pressing-in - Google Patents

Abstract

PURPOSE:To allow an assembly device to get rid of requirement for high precision by holding a chucking device, which is to grasp a set of parts to be assembled by pressure fitting at certain specified pitches, in such a way as movable microscopically in a plane normally crossing the press direction. CONSTITUTION:Two or more main bearing caps 11 are laid at a certain specific pitch by a regular delivery device to be grasped by a chucking device 18. These caps 11 are built in a cylinder block, arranged below, at its specific position through pressure fitting by sinking the chucking device 18 using an oil hydraulic device 54. At this time, the chucking device 18 can make a micro movement in a plane normally crossing the press-in direction with the aid of gaps etc. between the side 60a of wheel 60 and the side face 22a of guide rail 22. Accordingly, even through the locational accuracy of the chucking device is not so high, possible errors will be absorbed automatically and the parts can be built in securely and accurately.

Description

[Detailed description of the invention]

The present invention relates to an apparatus for simultaneously and automatically press-fitting a set of parts into a predetermined position on a workpiece. In the production of cylinder shafts for automobile engines,
As an intermediate factory, there is a process for press-fitting and assembling the main bearing cap. Conventionally, this process has been performed manually, but in order to improve the I-P and reduce the stress on the teeth, it is desirable to perform this press-fitting work automatically. In order to automatically press-fit a large number of parts such as main bearing caps into predetermined positions on a workpiece such as a cylinder block, it is necessary to accurately position and grip the large number of parts. A highly accurate reference point is required, and the device itself is also required to have a high degree of accuracy. In addition, mechanical rigidity is required for high-speed assembly, which increases the size of the device. Furthermore, to prevent foreign matter such as =r from adhering to the assembly surface of the parts and workpiece,
It is necessary to clean the assembly surface. The present invention has been made in consideration of these points,
- It is an object of the present invention to provide a device that can automatically press-fit a set of parts into a predetermined position on a workpiece. The present invention includes a part sorting device for sorting [F] a set of parts to be press-fitted and arranged at a pitch corresponding to the press-fitting assembly interval;
A chuck device that grips a set of parts at the same time, a chuck elevating drive device connected to the chuck device and driving the chuck device up and down, and a five-component sorting device that uses the chuck device together with the chuck elevating drive device to hold a set of parts in a predetermined position. A chuck reciprocating drive device that reciprocates from a position arranged at a pitch of 1 to a position where parts are press-fitted to a position where the parts are press-fitted. is held so that it can be moved slightly in the direction perpendicular to the press-fitting direction at the position where the parts are press-fitted.

[It's my turn to be there. According to the present invention 11, it is possible to reduce the accuracy of the relative positional relationship of each component of the press-fitting assembly device, and it is possible to reduce production costs in terms of assembly man-hours and component accuracy. Furthermore, according to the present invention, mechanical rigidity can be improved without increasing the size of the device. An embodiment of the present invention will be described below with reference to the drawings. 1m# and 2 are views showing examples of parts and workpieces to be press-fitted by the press-fitting assembly apparatus according to the present invention. In II, reference numeral 11 is a bearing cap, and reference numeral 11 is a cylinder block into which this bearing cap 11 is press-fitted. The plurality of caps 11 (five in this embodiment) are assembled so that the mounting surface 11m of the cap 11 is in contact with the respective mounting surface 12a)C of the cylinder block 12 having a predetermined pitch. At this time, the lower end 11b of the carriage 110 is press-fitted to the inner end 12b of the cylinder block assembly surface 12m. The cap 11 has a semicircular hole 11 through which the crankshaft is inserted, and holes 13 through which tightening bolts are inserted are provided in both shoulders. In this embodiment, such a bearing cap 1 is used.
1 into the cylinder block 12 will be described. FIG. 3 is a cross-sectional view of the press-fit assembly device according to this embodiment, and FIG.
The figure is a plan view taken along the line W-Wllj'fC in FIG. 3. In the figure, reference numeral 14 is an intermediate play plate I placed between the press-fit assembly device 15 according to this embodiment and the cap manufacturing device (not shown), and is conveyed from the cap manufacturing device by the belt conveyor 16. A plurality of bearing caps 11 are grasped as a set in a required number and transferred to a press-fit assembly device 15. The press-fit assembling device 15, a parts sorting device 17 that sortly feeds a set of bearing caps transferred from the cap radar i4 and arranges them at a pitch corresponding to the regular assembly interval, and simultaneously grips the − set of bearing caps. Chuck device 18 and this chuck device 18
a chuck elevating drive device 19 connected to the chuck device 18 for moving the chuck device 18 up and down; 11
A six-component sorting device 17 consisting of a center pace 21 that holds the cylinder block U to be press-fitted in the press-fitting assembly position and a center pacega are placed on the floor and guide the reciprocating movement of the chuck device 18. Guide rail η
The guide rails ρ are connected by support columns 24 that support the guide rails ρ. The chatter elevating drive holder 19 is mounted movably on the guide rail n, and the chuck device 18 is arranged so as to be able to reciprocate from a predetermined position to a predetermined position above the parts sorting device 17 and the center pace 2.

[There is. FIG. 5 is a side view including a partial cross section of the cap 4-der 14. A pivot shaft is installed perpendicularly to the frame 6 placed on the floor, and a pivot arm γ is fixed horizontally above the pivot axis. At the tip of the rotating arm n, locating pin markings corresponding to the number of bearing caps to be transferred are arranged and identified vertically downward. Further, below the swing arm r, elongated support strips are held by bearings I so as to be slidable in the same direction as the swing arm I. This support and small sliding movement is performed by a hydraulic cylinder 31 attached to the swing arm 27, and its forward and backward movements are installed at predetermined intervals or controlled by an IT switch. The pivot shaft is capable of pivoting in a horizontal plane and can also move up and down vertically. The rotational drive of the pivot shaft 3 is performed by a hydraulic cylinder /33 attached to the frame δ, and the vertical drive is performed by a vertical drive hydraulic cylinder IJ/34 mounted vertically on the seven frames 25. In order to enable both turning movement and vertical movement, the lower part of the turning axis is formed into a spline shape. FIG. 6 is a partially enlarged sectional view showing a state in which the cap 11 is gripped by the cap loader 14. In this embodiment, the parts to be press-fitted have a semicircular hole 11 and a bolt insertion hole 13, so insert the support piece into the semicircular hole 11@, and insert the bolt insertion hole into the bolt insertion hole. A method is used in which the location F bottle group is inserted into the cap 13, the cap 11 is grasped from above and below, and the caps of the set are skewered at the same time. FIG. 7 is a partially enlarged sectional view showing the parts sorting device 17. As shown in FIGS. 3, 4, and 7, the parts sorting device 17 has seven frames installed on the floor and a table installed above this frame. A set of bearing caps can slide on the top surface. The number of cam groove sides equal to the number of bearing caps in the - set is formed above the teacup by several horizontal side plates r arranged perpendicularly to the table at predetermined intervals. This cam groove has an interval that allows the bearing cap 11 to slide therein, and the final end 38aKiM has a predetermined pitch (in this embodiment, the mounting surface 12 of the cylinder I book p 12
m pitch). In addition, the bottom surface of the side plate r forming the cam groove side is arranged at a predetermined distance from the top surface of the table base, and a gap is formed at a constant distance between the bottom surface of the side plate r and the top surface of the table. has been done. The code cutter is a 5-piece cover between the cam grooves from above,
By providing this cut, the bearing cap 11 is prevented from falling during sliding, and not only can it be reliably fed, but also foreign objects can be prevented from entering between the cam grooves. There is also a plate 4 on the top of the table violet.
1 is disposed so as to be slidable in the front and rear directions. play) 4
1 is for feeding a set of bearing caps between the cam grooves and sending them out from the final end 381, and has a width slightly wider than the space provided between the cam grooves, and a side plate r and the upper surface of the table audience. It has a thickness slightly smaller than that of the gap island, and its rear end is fixed to a feeding hydraulic cylinder 42 horizontally attached to the 7th frame I. At a position close to the final end 381 of the cam groove, a lifter plate 43 is placed horizontally, on which a pair of bearings fed out from the cam groove is placed. The bottom of the IJ lid plate is connected to a lift hydraulic tower/44 that is mounted directly on the frame, and lifts the lid plate 43 from the top of table I to a position suitable for the next full-scale assembly process. It is made to be. 5aiii is a front view including a partial cross section showing the chuck device 18 and the chuck lifting/lowering driving device bell; The chuck device 1B includes the same number of hook-shaped swinging hooks and hook pins as there are one set of parts, and a hook swinging mechanism. (The ring cap 11 is attached to the footer 6 in the semicircular hole lie part.)
swings and the tip is inserted, /J4/) insertion hole 1
By inserting the locate pin 46 into 3, it is gripped from above and below. The hook swinging mechanism includes a sintering mechanism mallet that swings around a fulcrum 47 on the hook, and a hydraulic cylinder 49 that operates the linkage mallet. 7. The swinging of the 7-piece is controlled by a protrusion I attached to the link mechanism mallet and a touch switch 51.A locate pin 52 for positioning is further attached to the chuck device 18. 18 is lowered relative to the parts sorting device 17, and the bearing cap 1
1, the chuck device 18 is inserted into and engaged with a locate bush 53 (see FIG. 4) that has a hole that engages with the locate pin 52 provided in the component alignment device 17.
5 to ensure accurate positioning. The cross section of the locate pin has a flat shape, and when it is inserted and engaged with the hole of the circular locate bush group, the chuck device 18
Positioning is performed only in one direction. A chuck elevating drive device 19 that drives the chuck device 18 up and down is attached above the chuck device 18 . The chuck lifting/lowering drive device 19 is a hydraulic cylinder 154 for lifting/lowering.
and is connected to the upper part of the chuck device 18 via a four-way chain. In addition, guide shafts are fixed at both ends of the upper part of the chuck device 18 to guide the vertical movement of the chuck device 18 by a hydraulic cylinder, and a clamp device 57 is attached to one of the guide P shafts. There is. This clamping device 57 is for preventing the chuck device holder from falling due to its own weight in the event of a power outage, and has a spring 58 and a clamping pusher z59. Running wheels 6o are provided on both sides of the chuck lifting drive device 19, and when this running wheel ω is placed on the guide rail n, the chuck lifting drive device t and the chuck 1llll18 connected thereto are guided by K. It is designed to move back and forth along the rail 22. In addition, a gap is provided between the side surface 60m of the running wheel mark and the side surface 22m of the guide rail n, so that the chuck elevating drive device 19 can move slightly to the left and right on the guide rail 22. There is. Figure 9 is a partial plan view seen from the direction of the arrow in Figure 3.
A state in which the chuck lifting/lowering drive device 19 and the chuck reciprocating drive/bale placement are connected is shown. On the rear end of the plate 00 of the chuck lifting drive iron bell, which has a rutted hydraulic cylinder for lifting, a Tigiwtso with a long rod is fixed. The hawk-shaped member is connected to the hawk-shaped member group through KW.
It is connected to 67. In this way, the chuck elevating drive device 19 and the chuck reciprocating drive device are separate from each other.
Since the connection is made using K, the chuck lifting drive device 1
9 can be moved minutely in the front and back direction with respect to the chuck reciprocating drive device 20. FIG. 10 is a fresh front view showing the center pace 21. FIG. The center pace 4 has a pair of shoes ω that lifts the cylinder block 12 to the large assembly position 68 in the upper direction, a pair of shoes ω in the middle that lifts the cylinder block 12 to the normal size assembly position 68, and a vertical drive value [7] in the lower direction.
A locking mechanism 71 is provided to hold the crane A 69 and the crank A 69 in an upwardly raised foreshadowed position. At the full-length assembly position 68, the bearing cap 11 is lowered from above, the cylinder block is raised from below, and the full-length assembly of the bearing cap 11 to the cylinder block is completed. When the press-fitting assembly position is difficult, a pair of cap guys P72 are arranged facing each other with a predetermined interval. 5 so that the lowering position can be adjusted (in the direction perpendicular to the arrangement direction of the set of caps). The height reference in the compression assembly position is determined by the lower end surface of a positioning block 73 fixedly installed adjacent to the cap guy)'n. Also, the left and right direction (-
To adjust the position of the set of bearing caps (in the arrangement direction),
A pair of left and right circular holes are arranged above the cap guide π. ) has a flat gfla island that comes into contact with the bottom surface of the cylinder block 12, and is held by vertically supporting the rod F75 connected below by a bearing 76 so as to be movable in the vertical direction. A locking arm 78, which is swung vertically by the locking arm IP'rl, is brought into contact with the lower end of the red 75, so that the locking arm 78 can be driven up and down. The lower i[K of the locate arm π is such that the wedge member W of the four-wheel mechanism 71 is inserted from the horizontal direction, and the wedge *
#79 locks the swinging position of the four-gate arm 78, and reliably applies a force against the press-fitting reaction force to the clamper ω lifted by a predetermined position meter locate clamp cylinder/77. The wedge member 4 can be moved back and forth by a lock sirino/80 connected to the wedge member 79. A rotating brush 81 for cleaning the assembly surface 11m of the bearing cap 110 is disposed between the parts sorting device 17 and the center pace 21 (see FIGS. 3, 4, and 1).
(See diagram θ) The zero-rotation brushes 81 are arranged in the same number as one set of bearing caps at a predetermined pitch, and are rotationally driven by an electric motor.
The electric retractor is attached to the side wall of the center pacer 21, and when the set of bearing caps is transferred by the chuck device 18 from the component handling device 17 to the press-fit assembly position of the center pacer, the rotating brush 810 circumferentially rotates. The height is adjusted to a position where it can make sliding contact with the surface. Next is a book with this structure! J! The effects and effects of the vaginal example will be explained. First, when a set of bearing caps is conveyed from the cap manufacturing device to a predetermined position on the cap loader 14 by the belt conveyor 16, the swing arm r is swung to a predetermined position by the hydraulic cylinder/33, and then the hydraulic V link/34 The pivot shaft and pivot arm 1 are pulled down. As the swing arm n descends, the locating pin 4 with KIR attached to the tip moves to the bearing cap 1 as shown in Fig. 6.
is inserted into the bolt insertion hole 13. Next, the support shaft 4 is advanced by the hydraulic cylinder 31, and as shown in FIG. , is rotated 90 degrees by hydraulic crank/33. From this k, one set of bearing caps is simultaneously transferred to the front end entrance position of the cam groove path of the parts sorting device 1f. In this manner, by simultaneously gripping and transferring a plurality of bearing caps, the time required for the transfer process can be shortened. Cap low/
14 then releases the gripping state of the bearing cap 11 by retreating the support shaft 4 and raising the rotating arm n, and then rotates 9o again to proceed to the next gripping operation. A pair of bearing caps transferred by the cap row/14 are pushed by the play (41) and fed into the cam grooves by the operation of the hydraulic cylinder/42 of the parts sorting device 17. The plate 41 slides within the gap 39 formed below the cam groove, and is attached to the bearing cap 1 inside the cam groove.
Press the lower part of 1 to ensure that it is fed out from the final end 381. -The final end of the cam groove for the set of bearing caps is 38m.
When they are sent out, they are arranged at a predetermined pitch corresponding to the interval for press-fitting and assembling. A set of bearing caps sent out from the final end 381 of the cam groove is placed Km above the lid plate 6, and then lifted to a predetermined height by a hydraulic cylinder 44. By lifting a set of bearing caps aligned in this way to a position corresponding to the next press-fit assembly process, the chuck device i18
The chuck lifting and lowering drive device 19 can be made smaller by reducing the lifting and lowering movement of the chuck. - When the pair of bearing caps is lifted to a predetermined height by the lifter plate 43, the chuck lifting drive device 19 and the chuck device [18] are pulled by the hydraulic cylinder/67, and the chuck device 18 is moved to the lifter plate 43.
Move to the upper lid. Next, the chuck device [18] is lowered by the operation of the hydraulic cylinder 154, and the KO
The cane bins 46 are each inserted into the gel insertion holes 13 of the bearing cap 11. In this case, the adjustment of the descent of the chuck device 18 is performed by engaging the positioning locating pins 52 attached to both ends of the chuck device W118 with the gastric locator: L53 provided on the parts sorting device 17. When the chuck device lever is positioned with a slight error with respect to the predetermined position, the T-shaped member 80 fixed to the rear end of the plate 61 with the chuck lifting/lowering drive value t19 and the reciprocating drive hydraulic cylinder From the gap between the bottle handle of the horter-shaped member enclosure connected to the holster 67, and the gaps C1 and K between the side surface 60& of the running wheel mark and the side surface 22m of the guide rail n, the chuck lifting drive device W can move forward and backward. It can move minutely in the left and right direction to absorb one difference. Bearing cap 1
When the pin 46 is inserted into the bolt insertion hole 13KO of No. 1, the link mechanism is activated by the hydraulic cylinder 49, the hook 45 swings, and its tip enters the semicircular hole 11 of the bearing cap 110. , and grip a set of bearing caps between the locating pin 46 and the locating pin 46. This gripping operation by the seven grips 45 is performed by the Riot switch 5.
1 and issues a signal indicating the end of the gripping operation. This is K
The chuck device 18 is lifted again by the operation of the hydraulic cylinder 154. The chuck lifting device 1 is activated by the operation of the hydraulic cylinder 67.
9 is pressed, the wheel ω runs along the rail n, and with the - set of bearing caps gripped, the chuck device 1
8 is transferred to the press-fitted assembly position of the center base 21 above the pupil. When the chuck device 18 is transferred, the mounting surface 11m of the earring cap 11 comes into sliding contact with the circumferential surface of the rotating brush 810, and foreign matter such as chisels are removed. The cylinder block 12 is transferred to the lower part of the press-fitting assembly process mallet of the center base 21 by the transfer blades with the bearing cap 110 mounting surface 12m facing upward. The transfer/setter transports the cylinder block 12 between the pair of cranometers ω at a position relatively higher than the plane 69m of the cranometers ω. Subsequently, due to the relative vertical movement between the crane and the transfer/station wing, the plane 691 of the cylinder rises above the 7-arno 5-83, flattening the cylinder block 12 on the 7-ar A-wing. Uke takes on 1169a. The crank ω is further lifted by the vertical drive device 70 and stops when the upper surface of the cylinder plotter arm abuts the lower end surface of the positioning block 73. By providing a positioning device /Y85 (see the GS diagram) on the lower end surface of the positioning boot stock 73, the positioning of the cylinder can be reliably performed. , the raised state of the cylinder tab 12 to a predetermined height is mechanically locked. With the cylinder plotter arm held bare at a predetermined height, the bearing cap 11 is press-fitted from above the cylinder plotter arm. This is done by lowering the cap device 18, which is waiting above the compression assembly position, by the hydraulic cylinder 154, and pressing the -set of earring caps against the mounting surface 12aK of the cylinder block 12 at the same time.
It will be done more. In this case, the positioning of the - set of bearing caps to the press-fitting assembly position is performed by the engagement of the tip of the cap guy P72 and the four-tone tone 52 with the locating bush 74, but there is a slight error in the lowering position of the chuck device 18. If there is a clearance between the elongated hole 62 and the bin θ and the clearance a between the side surface 60m of the wheel ω and the side surface 22& of the guide rail η, the chuck lifting drive device 19 and the chuck The device 18 moves slightly,
The minute error can be absorbed. In this way, by holding the chuck device 18 so as to be able to move minutely in the direction orthogonal to the press-fitting direction in response to the application of the chuck reciprocating drive device, press-fitting can be performed accurately and reliably without increasing the precision of the device. be able to. The press-fitting reaction force of the bearing cap 11 due to the lowering of the chuck device 18 is caused by the chuck elevating drive device 1 provided in sliding contact with the lower surface of the guide rail n.
It can be received by the 9th keep plate sinus (the 8th
(see figure). Tallinn/fw of bearing cap 11 as in
When the press-fit assembly to the x-tuck 12 is completed, the gripping state of the 7-took 45 is released by the operation of the linter mechanism, and the chuck device I8 rises again to prepare for the next process, and the clamp A
fB is released from the locked state by the P-lock mechanism 71 and descends, passing the cylinder block 12 to the transformer 7 Arnaud & 3. The transfer blade transfers the cylinder block 12 with the ring cap 11 press-fitted to the next manufacturing process position, and the press-fit assembly process of the ring cap is completed. Although the transfer of the cap and cylinder seat to the press-fit assembly position has been explained separately, it is more efficient to carry out these operations at the same time.Also, the hydraulic cylinder (and hydraulic crank/77) moves the bearing cap 11 and cylinder block 1
2 are placed in a predetermined positional relationship and brought into contact with each other, and the locking mechanism 71 lifts and holds the crank A6B, a more effective pressing force can be obtained. As described above, according to the present invention, a large number of parts can be press-fitted automatically and efficiently. Further, press-fitting can be reliably performed without providing a highly accurate reference point or increasing the accuracy of the device itself. Therefore, the advantage of this embodiment is that automatic press-fit assembly can be performed reliably without chamfering the press-fit portions of the bearing cap and cylinder block, and the chamfering process can be omitted and the processing cost F can be reduced. . In addition, since the reaction force during press-fitting is received by the guide rail, keep plate, and lock mechanism, it is possible to reduce the burden on the chuck lift drive device and locate flange cylinder/77, and obtain a large press-in force. , mechanical rigidity can be improved without increasing the size of the device. In this embodiment, a bearing cap is used as a component to be assembled, and a cylinder block is used as a workpiece to be assembled. However, the present invention can also be applied to the case where other parts and workpieces are press-fitted. can.

[Brief explanation of the drawing]

1 and 2 are diagrams showing examples of parts and workpieces to be press-fitted by the press-fit assembly apparatus according to the present invention, FIG. 3 is a cross-sectional view of the press-fit assembly apparatus according to the present embodiment, and FIG. 4 is a plan view taken along the line 11 in FIG. 3, FIG. 6 is a side view including a partial cross section of the cap I4, FIG. 6 is a partially enlarged sectional view showing the state in which the bearing cap is gripped by the cap row, and FIG. 7 is a view of the parts. Partially enlarged side sectional view showing the sorting device, No. 8
The figure is a front view including a partial cross section showing the chuck device and the chuck lifting/lowering drive device, FIG. 9 is a partial plan view seen from the direction of the arrow shown in FIG. 3, and FIG. 1θ is a sectional view showing the center pace. DESCRIPTION OF SYMBOLS 11...Bearing cap, 12...Cylinder block, 14...Cap router, 17...Parts sorting device, Haruka-chuck device, 19...Chuck lifting/lowering drive device, processing...Chuck Reciprocating drive number position, n...center pace, n...guide rail, straw...cam groove,
45...7 swings, winnow...p kate bin, &...
・Locate button, mark - running wheel, goose...long hole,
Nishiki...Press-fit assembly position, ω...Kutsunno, 70...
・Cranno vertical drive device, 71... ptsuk mechanism, 7
2... Cap guide, 74... Locating bush, 79... Bevel member, 81... Rotating brush. Applicant's agent Kiyoshi Inomata

Claims (1)

[Scope of Claims] 1. A parts sorting device that feeds a set of parts to be press-fitted and arranged at a pitch corresponding to the press-fitting assembly interval, and a chuck device that simultaneously grips the set of parts; A chuck elevating drive device connected to the chuck device and driving the chuck device up and down; and a chuck elevating drive device together with the chuck elevating drive device press-fit the parts from a position where the parts of the set are arranged at a predetermined pitch. The chuck device includes a reciprocating chuck drive device that reciprocates to the position where the parts are attached, and a center pace that holds the parts at the press-fitting position of the workpiece where the parts are press-fitted. A device for automatically press-fitting a set of parts onto a workpiece, characterized in that the parts are held so as to be able to move minutely in a direction orthogonal to the direction of the workpiece. 1. The parts sorting device consists of a table on which the parts of the set slide, and a table on which the parts of the set slide, and a table on which the parts of the set slide inside the cabinet whose final ends are arranged at a predetermined pitch above the table. 2. The press-fit assembly apparatus according to claim 1, further comprising cam grooves of the same number as parts, and a feeding device that feeds a set of parts into the cam grooves and feeds them from the final end. 3. The parts sorting device includes a cam groove whose bottom surface is formed by a side plate disposed at a predetermined interval from the table top surface, and a plate that moves within the interval past the final end K111 of the cam groove. 3. A pressure λ assembly device according to claim 2, further comprising: 4. The press-fit assembly device according to claim 1, wherein the chatter device is equipped with seven hook-shaped swinging vines, the same number as the parts in the set. 2. The press-fitting assembly apparatus according to claim 1, wherein the parts are connected with a gap in a direction perpendicular to the press-fitting direction. 6. A locating pin for positioning is attached to the chuck device, and a locating bush having a hole that engages with the locating pin is attached to the center pace. Press-fit assembly equipment. 7. The press-fit assembly device according to claim 6, wherein the locating pin has a flat cross section. 8.12 The press-fit assembly device according to claim 6, wherein the hole of the Kate bushing is circular. 9. The chuck reciprocating drive device includes a guide rail that guides the reciprocating movement of the chuck device, and a hydraulic cylinder that reciprocates the chuck device fixed to the guide rail. The press-fit assembly device according to item 1. 10. The press-fit assembly apparatus according to claim 9, wherein the chuck elevating and lowering drive device is configured to reciprocate on the guide rail. 11. The press-fit assembly apparatus according to claim 1, wherein the center pace is equipped with a cran jaw for lifting and holding the workpiece to a predetermined height position. (2) The press-fit assembly device according to claim 11, wherein the press-fit assembly device is held at a predetermined height by a locking mechanism. Claim 1, characterized in that the 0w vine mechanism is equipped with a wedge member for V-tuck.