JP2009000769A - Method for setting up assembly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of setting up an assembly comprising a plurality of components stacked, with a low cost in a reduced space. <P>SOLUTION: The method of setting up the assembly is for setting up a front fork assembly constituted of forks including a right fork 11A located on the uppermost stage down to a left fork 11B located on the lowermost stage, which are stacked. The method of setting up the assembly includes a first step of holding the right fork 11A by a holder 30 with a conveyer driven, and an m-th step of holding an m-th component while holding by the holder 30 the components including the right fork 11A down to the (m-1)-th fork (where m refers to an integer of 2 or larger). The m-th step is repeated until m becomes 5 from 2, thereby sequentially realizing the setup of the front fork assembly. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for assembling an assembly. Specifically, the present invention relates to a method for assembling an assembly in which a plurality of components are stacked.

  Conventionally, a front fork assembly, which is a front wheel part of a motorcycle, is composed of a pair of forks, a stem, a wheel, a brake panel, an axle, and the like. Of these components, through holes are formed in the fork, stem, wheel, and brake panel.

The front fork assembly is assembled, for example, by the following procedure (see Patent Document 1).
That is, first, a stem is assembled, a pair of forks is attached to the stem to assemble it, and then this assembly is transported to an assembly station.

  In this assembly station, a wheel to which a brake panel is attached is prepared, this wheel is disposed between a pair of forks of the transported assembly, and the axle is inserted into the fork and the wheel. Then, adjust the relative position of the fork and wheel and tighten the axle with a nut.

According to this method, it is possible to easily assemble the front fork assembly by automating a part of the work process.
Japanese Patent No. 2773754

  However, the above-described assembly method requires equipment for inserting the axle through the wheel and fork, and equipment for positioning the wheel and fork. Therefore, the equipment cost increases and a large space is required.

In order to solve the above-mentioned problems, the present inventors paid attention to the fact that, among the components of the above-mentioned front fork assembly, the fork, the wheel, and the brake panel have a structure in which the axles are inserted through lamination.
SUMMARY OF THE INVENTION An object of the present invention is to provide an assembly method for assembling an assembly configured by laminating a plurality of parts at low cost and in a space-saving manner.

  The assembly method of the assembly according to the present invention includes a first part (for example, a right fork 11A described later) located at the uppermost stage to an nth part (n is an integer of 2 or more) located at the lowermost stage (for example, A method of assembling an assembly (for example, a front fork assembly 10 to be described later) configured by stacking up to a left fork 11B (to be described later), and a first component by a transport means (for example, a transport device 22 to be described later). The first procedure for gripping the mth component in the state where the first to (m−1) th components (m is an integer equal to or greater than 2) are gripped by the transport unit and the first procedure. The assembly state of the assembly is realized in order by repeating the m-th procedure until m becomes 2 to n.

According to this invention, first, the first part is gripped by the conveying means. Next, the second part is gripped by the conveying means while the first part is gripped. Next, the third part is gripped by the conveying means while the first and second parts are gripped. Next, the fourth part is gripped by the transport means while the first to third parts are gripped. Such an operation is repeated until the part located at the lowermost stage is gripped.
Therefore, the assembly state can be realized in order only by moving the conveying means in order from the first part to the nth part, so that the assembly can be assembled. Therefore, the conventional assembly station and the equipment for positioning the parts are not necessary, and the assembly can be performed by one transport means, so that the cost can be reduced and the space can be effectively utilized.

  According to the present invention, the assembly state can be realized in order by simply moving the conveying means in order from the first part to the nth part, so that the assembly can be assembled. Therefore, the conventional assembly station and the equipment for positioning the parts are not necessary, and the assembly can be performed by one transport means, so that the cost can be reduced and the space can be effectively utilized.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[Configuration of front fork assembly]
FIG. 1 is an exploded perspective view of a front fork assembly 10 assembled by an assembly method according to an embodiment of the present invention.

  The front fork assembly 10 is a front wheel portion of a motorcycle, and includes a pair of forks 11A and 11B, a stem 12, a wheel 13, a brake panel 14, and an axle 15.

The pair of forks 11A and 11B is composed of a right fork 11A disposed on the right side and a left fork 11B disposed on the left side, each of which is a long member, and an insertion hole 111 is formed on the distal end side. Is formed.
The stem 12 is formed with a pair of insertion holes 121 through which the forks 11A and 11B are inserted. The forks 11A and 11B are inserted into the insertion holes 121 and tightened with bolts 122, whereby the pair of forks 11A and 11A, 11B is held substantially parallel.

The wheel 13 has a substantially disk shape, and an insertion hole 131 is formed at the center of the wheel 13.
The brake panel 14 has a substantially disk shape and is attached to the wheel 13. An insertion hole 141 is formed at the center of the brake panel 14.
The wheel 13 is disposed between the pair of forks 11A and 11B with the brake panel 14 attached.

  The axle 15 is inserted into the insertion holes 111, 131, 141 of the pair of forks 11, the wheel 13, and the brake panel 14, and the cylindrical collar 151, and is tightened with a nut 152, whereby the wheel 13 is forked. 11 is rotatably fixed. That is, by inserting the axle 15, the insertion holes 111, 131, 141 of the pair of forks 11, the wheel 13, and the brake panel 14 and the cylindrical collar 151 have a common axis. Become.

[Overall configuration of assembly equipment]
FIG. 2 is a plan view of the assembling apparatus 1 for assembling the front fork assembly 10.
The assembly apparatus 1 includes a first assembly apparatus 2, a control panel 3 that controls the first assembly apparatus 2, a second assembly apparatus 4, and a control panel 5 that controls the second assembly apparatus 4.

[Configuration of first assembly apparatus]
The first assembling apparatus 2 stacks and holds the right fork 11A, the collar 151, the wheel 13, the brake panel 14, and the left fork 11B in order to form an assembly 16, and the axle 15 is attached to the assembly 16. Insert.

  The first assembling apparatus 2 is provided with a rectangular table 21 surrounded by a wall 211, a conveying device 22 as a conveying means provided on the table 21, and the table 21 so as to be rotatable. A circular reversing table 23.

  On the table 21, a right fork supply area 212, a color supply area 213, a wheel supply area 214, and a brake panel supply area to which the right fork 11A, collar 151, wheel 13, brake panel 14 and left fork 11B are supplied, respectively. 215 and a left fork supply area 216 are provided.

The transport device 22 includes a gripping device 30, a lifting mechanism 221 that raises or lowers the gripping device 30, a first moving mechanism 222 that moves the lifting mechanism 221 in the Y-axis direction, and the first moving mechanism 222 as X A second moving mechanism 223 that moves in the axial direction.
By the first moving mechanism 222 and the second moving mechanism 223, the gripping device 30 can be moved over almost the entire area of the table 21 including the supply areas 212 to 215.
A specific configuration of the gripping device 30 will be described in detail later.

The center of rotation of the reversing table 23 is located at the edge of the table 21, so that half of the reversing table 23 is arranged so as to overlap with half of the table 21.
On the reversing table 23, a wall portion 231 extending linearly through the center of rotation is provided, and the reversing table 23 is partitioned into a first work area 23A and a second work area 23B by the wall portion 231. It has been.

  One of the two work areas 23 </ b> A and 23 </ b> B (work area 23 </ b> A in FIG. 2) is located on the table 21 and is surrounded by the wall part 211 of the table 21 and the wall part 231 of the reversing table 23. At the same time, the other (work area 23B in FIG. 2) of the two work areas 23A and 23B is located outside the wall part 211 of the table 21 and the wall part 231 of the reversing table 23.

  An axle lifting mechanism 24 is provided in each of the first work area 23A and the second work area 23B.

FIG. 3 is a cross-sectional view of the axle lifting mechanism 24.
The axle lifting mechanism 24 includes a chuck 241 that grips the axle 15 so that the central axis is substantially vertical, and a lifting mechanism 242 that lifts and lowers the chuck 241. According to the axle elevating mechanism 24, the axle 15 is lifted along the axial direction by causing the chuck 15 to grip the axle 15 and driving the elevating mechanism 242, thereby protruding from the surface of the reversing table 23. it can.

[Configuration of gripping device]
FIG. 4 is a perspective view illustrating a schematic configuration of the gripping device 30. FIG. 5 is a side view of the gripping device 30.
The gripping device 30 includes a plurality of cylindrical collets 31 arranged in a row, a plurality of cylindrical pieces 32 arranged between the plurality of collets 31, and the collet 31 and the pieces 32 sandwiched from both ends. And a pressurizing device 33 for pressurizing with.

  The plurality of collets 31 are arranged so that the central axis is coaxial, and the pieces 32 are arranged between the collets 31 so that the central axis is coaxial with the collet 31. That is, the collet 31 and the piece 32 are alternately arranged on a straight line.

FIG. 6 is an exploded perspective view of a part of the gripping device 30.
In the collet 31, slits 311 extending from the vicinity of one end edge to the other end edge and slits 312 extending from the vicinity of the other end edge to the one end edge are alternately formed.

  The outer diameter of the piece 32 is larger at the center than the inner diameter of the collet 31 and decreases from the center toward both ends, and is smaller than the inner diameter of the collet 31 at both ends. Therefore, both ends of the piece 32 are smaller than the inner diameter of the collet 31, so that both ends of the piece 32 are in the collet 31.

  Returning to FIGS. 4 and 5, the pressurizing device 33 is supported by the above-described lifting mechanism 221, the gripping flange 34 in which the through hole 341 is formed, the through hole 341 and the collet 31 and the piece 32. A pressure pin 35 and an actuator 36 that is provided on the grip flange 34 and moves the pressure pin 35 back and forth.

The gripping flange 34 includes a flat plate 342 and a first pressure unit 343 integrally formed at the center of the plate 342. The first pressurizing unit 343 has a shape in which the piece 32 is halved. That is, the outer diameter of the first pressurizing part 343 is larger on the plate side than the inner diameter of the collet 31 and becomes smaller toward the tip part, and is smaller than the inner diameter of the collet 31 at the tip part.
The above-described through hole 341 is formed so as to penetrate the plate 342 and the first pressure member 343.

A second pressure member 351 having the same shape as the piece 32 is integrally formed at the tip of the pressure pin 35.
The actuator 36 moves the pressure pin 35 forward and backward, and is controlled by the control panel 3 described above.

  According to the pressurizing device 33, the pressurizing pin 35 is retracted, and the first pressurizing unit 343 and the second pressurizing unit 351 press the collet 31 and the piece 32 from both ends.

Next, the operation of the gripping device 30 will be described.
When the actuator 36 is not operated, both ends of the piece 32 enter the collet 31, but the collet 31 is not expanded because it is not pressurized.

Next, the actuator 36 is operated, and the pressure pin 35 is moved backward by the applied pressure F. Then, the first pressurizing unit 343 and the second pressurizing unit 351 pressurize the collet 31 and the piece 32 with the applied pressure F. This pressure F is transmitted through each collet 31 and each piece 32 and acts equally on all the collets 31 and pieces 32.
For example, when a certain collet 31 is described, two pieces 32 positioned on both sides of the collet 31 move forward toward the inside of the collet 31, and the interval between the adjacent pieces 32 is shortened. Then, since the outer diameter of the central part of the piece 32 is larger than the inner diameter of the collet 31, the outer peripheral surface of the piece 32 presses the inner wall surface of the collet 31 in the direction of arrow A as shown in FIG. As a result, the collet 31 is elastically deformed, and the outer diameter of the collet is expanded in the direction of arrow B as shown in FIG.

  Thereafter, when the pressurization by the pressurizing device 33 is released, the piece 32 is pressed by the inner wall surface of the collet 31 by the restoring force of the elastic deformation of the collet 31, and the piece 32 moves backward toward the outside of the collet 31. At the same time, the outer diameter of the collet 31 contracts and returns to the outer diameter.

The operation of the first assembling apparatus 2 will be described.
The conveyance device 22 is driven, and the right fork 11A, the collar 151, the wheel 13, the brake panel 14, and the left fork 11B are sequentially stacked and held by the holding device 30 and assembled.

  Specifically, as shown in FIG. 9, the gripping device 30 is inserted into the insertion holes 111, 131, 141 and the collar 151 of the right fork 11A, the wheel 13, the brake panel 14, and the left fork 11B, and the pressurizing device 33 is operated. Then, the collet 31 presses the inner wall surfaces of the insertion holes 111, 131, 141 and the collar 151, and the frictional force keeps the insertion holes 111, 131, 141 and the collar 151 to be coaxial. The components 11A, 11B, 13, and 14 are gripped.

  Next, as shown in FIG. 10, in a state where the assembly 16 is gripped, the gripping device 30 is moved onto the reversing table 23 placed on the table 21, and the right fork 11 </ b> A, the collar 151, and the wheel 13 are moved. The brake panel 14 and the left fork 11B are stacked.

Next, when the pressurization by the pressurizing device 33 is released, the pressing force of the collet 31 against the inner wall surfaces of the insertion holes 111, 131, 141 and the collar 151 is released, and this assembly 16 is placed on the reversing table 23. The
Subsequently, the axle 15 is advanced toward the gripping device 30. That is, the axle 15 is raised. Then, the distal end of the axle 15 is inserted into the assembly 16 and comes into contact with the distal end of the gripping device 30.

Subsequently, as shown in FIG. 11, the gripping device 30 is slidable upward, and the axle 15 is raised so as to push up while maintaining the contact between the axle 15 and the gripping device 30.
In this way, the gripping device 30 is detached from the assembly 16, and the axle 15 is inserted into the insertion holes 111, 131, 141 and the collar 151 of the assembly 16.

In the first assembling apparatus 2 described above, the worker performs the work in the following procedure.
Returning to FIG. 2, for one of the two work areas 23 </ b> A and 23 </ b> B, the axle 15 is set on the axle lifting mechanism 24 and the reversing table 23 is reversed. Then, one of the two work areas 23 </ b> A and 23 </ b> B is located inside the table 21. Then, when the assembly 16 is transported by the transport device 22, the axle 15 is inserted through the assembly 16 by the axle lifting mechanism 24.

  At this time, the other of the two work areas 23 </ b> A and 23 </ b> B is located outside the table 21, so another axle 15 is set on the axle lifting mechanism 24.

Next, the reversing table 23 is reversed again, and one of the two work areas 23A and 23B is positioned outside the table 21. Since the assembly 16 through which the axle 15 is inserted is placed in the one work area, the worker can attach the assembly 16 through which the axle 15 has been inserted to the second assembly by an assist device of a transfer device (not shown). Transport to device 4.
At this time, the other of the two work areas 23 </ b> A and 23 </ b> B is located inside the table 21, so the next assembly 16 is placed by the transport device 22.

[Configuration of second assembly apparatus]
In the second assembling apparatus 4, for the assembly 16 conveyed from the first assembling apparatus 2, when an operator temporarily attaches a nut 152 to the axle 15 and sets the stem 12, the forks 11 </ b> A and 11 </ b> B of the assembly 16 are tightened with bolts 122. Tighten on the stem 12 to assemble the front fork assembly.

  The second assembly device 4 includes a rectangular table 41 surrounded by a wall portion 411, a bolt fastening device 42 provided on the table 41, and a circular shape provided rotatably on the table 41. And a reversing table 43.

  On the table 41, a bolt supply area 412 to which the bolt 122 is supplied is provided.

The bolt fastening device 42 includes a fastening device 421 that grips and fastens the bolt 122, a lifting mechanism 422 that raises or lowers the fastening device 421, and a first moving mechanism that moves the lifting mechanism 422 in the X-axis direction. 423 and a second moving mechanism 424 that moves the first moving mechanism 423 in the Y-axis direction.
The first moving mechanism 423 and the second moving mechanism 424 can move the tightening device 421 over almost the entire area of the table 41 including the bolt supply area 412.

The rotation center of the reversing table 43 is located at the end edge of the table 41, so that half of the reversing table 43 is arranged so as to overlap half of the table 41.
On the reversing table 43, a wall portion 431 extending linearly through the rotation center is provided, and the reversing table 43 is partitioned into a first work area 43A and a second work area 43B by the wall portion 431. It has been.

  One of the two work areas 43 </ b> A and 43 </ b> B (work area 43 </ b> A in FIG. 2) is located on the table 41 and is surrounded by the wall part 411 of the table 41 and the wall part 431 of the reversing table 43. At the same time, the other of the two work areas 43 </ b> A and 43 </ b> B (the work area 43 </ b> B in FIG. 2) is located outside the wall part 411 of the table 41 and the wall part 431 of the reversing table 43.

In the second assembly apparatus 4 described above, the worker performs the work in the following procedure.
First, in one of the two work areas 43A and 43B, the assembly 16 through which the axle 15 is inserted is conveyed from the first assembly device 2.
Therefore, the worker sets the stem 12, temporarily attaches the nut 152 to the axle 15, and reverses the reversing table 43. Then, one of the two work areas 43 </ b> A and 43 </ b> B is located inside the table 41.
Next, the bolt 122 is attached to the stem 12 by the bolt fastening device 42 and tightened. Thereby, the front fork assembly 10 is completed.

  At this time, since the other of the two work areas 43A and 43B is located outside the table 41, the next assembly 16 and the stem 12 are set.

Next, the reversal table 43 is reversed again, and one of the two work areas 43A and 43B is positioned outside the table 41. Since the assembly 16 placed in the one work area has already been completed, the worker conveys the completed front fork assembly 10 to the supply conveyor by an assist device of a conveyance device (not shown), Send it to the main line.
At this time, since the other of the two work areas 43A and 43B is located inside the table 41, the bolt 122 is attached to the next assembly 16 by the bolt fastening device.

Next, a method for assembling the front fork assembly 10 will be described with reference to FIGS.
First, as shown in FIG. 12, the gripping device 30 is moved to the right fork supply area 212 (see FIG. 2), the collet 31 of the gripping device 30 is inserted into the insertion hole 111 of the right fork 11A, and the right fork 11A is moved. Hold it.

  Next, as shown in FIG. 13, the gripping device 30 is moved to the color supply area 213 (see FIG. 2), and the right fork 11 </ b> A is stacked on the collar 151. Thereafter, the gripping device 30 is inserted into the collar 151 in addition to the right fork 11A, and the right fork 11A and the collar 151 are gripped. In this state, the insertion hole 111 and the collar 15 of the right fork 11A are located coaxially.

  Next, as shown in FIG. 14, the gripping device 30 is moved to the wheel supply area 214 (see FIG. 2), and the right fork 11 </ b> A and the collar 151 are stacked on the wheel 13. Thereafter, in addition to the right fork 11 </ b> A and the collar 151, the gripping device 30 is inserted into the wheel 13 to grip the right fork 11 </ b> A, the collar 151, and the wheel 13. In this state, the insertion hole 111 of the right fork 11A, the collar 15, and the insertion hole 131 of the wheel 13 are located on the same axis.

  Next, as shown in FIG. 15, the gripping device 30 is moved to the brake panel supply area 215 (see FIG. 2), and the right fork 11 </ b> A, the collar 151, and the wheel 13 are stacked on the brake panel 14. Thereafter, in addition to the right fork 11 </ b> A, the collar 151, and the wheel 13, the gripping device 30 is inserted into the brake panel 14 to grip the right fork 11 </ b> A, the collar 151, the wheel 13, and the brake panel 14. In this state, the insertion hole 111 of the right fork 11A, the collar 15, the insertion hole 131 of the wheel 13, and the insertion hole 141 of the brake panel 14 are located on the same axis.

  Next, as shown in FIG. 16, the gripping device 30 is moved to the left fork supply area 216 (see FIG. 2), and the right fork 11A, the collar 151, the wheel 13, and the brake panel 14 are stacked on the left fork 11B. . Thereafter, in addition to the right fork 11A, the collar 151, the wheel 13, and the brake panel 14, the gripping device 30 is also inserted into the left fork 11B, and the right fork 11A, the collar 151, the wheel 13, the brake panel 14, and the left fork are inserted. 11B is grasped and assembled. In this state, the insertion hole 111 of the right fork 11A, the collar 15, the insertion hole 131 of the wheel 13, the insertion hole 141 of the brake panel 14, and the insertion hole 111 of the left fork 11B are located on the same axis.

  Next, as shown in FIG. 17, the assembly 16 is placed on the reversing table 23 (see FIG. 2), and the axle 15 is inserted into the assembly 16.

  Next, the reversing table 23 is reversed, and the assembly 16 through which the axle 15 is inserted is taken out. Thereafter, the assembly 16 is conveyed onto the reversing table 43 (see FIG. 2) of the second assembling apparatus 4, and as shown in FIG. 18, a nut 152 is fastened to the tip of the axle 15, and the stem 12 is attached.

  Next, as shown in FIG. 19, the bolt 122 is fastened to the stem 12 by the bolt fastening device 42 (see FIG. 2) of the second assembly device 4, thereby completing the front fork assembly 10.

According to this embodiment, there are the following effects.
(1) The right fork 11 </ b> A located at the uppermost stage is gripped by the transport device 22. Next, the collar 151 is gripped by the transport device 22 while the right fork 11A is gripped. Next, the wheel 13 is gripped by the transport device 22 while gripping from the right fork 11 </ b> A to the collar 151. Next, the brake panel 14 is gripped by the transport device 22 while gripping from the right fork 11 </ b> A to the wheel 13. Next, the left fork 11B is gripped by the transport device 22 while gripping from the right fork 11A to the brake panel 14.

  Therefore, the assembly state of the front fork assembly 10 is realized in order by simply moving the conveying means 22 in the order of the right fork 11A, the collar 151, the wheel 13, the brake panel 14, and the left fork 11B. The fork assembly 10 can be assembled. Therefore, the conventional assembly station and the equipment for positioning the parts are not necessary, and the assembly can be performed by one transport means, so that the cost can be reduced and the space can be effectively utilized.

  (2) The right fork 11A, the collar 151, the wheel 13, the brake panel 14, and the left fork 11B constituting the front fork assembly 10 have large differences in size and shape depending on the model. 141 and the collar 151 as a reference, it is possible to easily cope with a model change.

  It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.

It is a disassembled perspective view of the front fork assembly assembled by the assembly method of the assembly concerning one embodiment of the present invention. It is a top view of the assembly apparatus which assembles the front fork assembly concerning the embodiment. It is sectional drawing of the axle raising / lowering mechanism which comprises the assembly apparatus which concerns on the said embodiment. It is sectional drawing of the holding | grip apparatus which comprises the assembly apparatus which concerns on the said embodiment. It is a side view of the holding | gripping apparatus which concerns on the said embodiment. It is a one part disassembled perspective view of the holding | grip apparatus which concerns on the said embodiment. It is sectional drawing which shows the state pressurized to the collet and piece which concerns on the said embodiment. It is sectional drawing which shows the state which the collet concerning the said embodiment expanded. It is a perspective view for demonstrating operation | movement of the holding | grip apparatus which comprises the front fork assembly which concerns on the said embodiment. It is sectional drawing which shows the state which set the assembly to the axle raising / lowering mechanism which concerns on the said embodiment. It is sectional drawing which shows the state which penetrated the axle to the assembly by the axle raising / lowering mechanism which concerns on the said embodiment. It is a side view which shows the state which hold | gripped the right fork which comprises the front fork assembly which concerns on the said embodiment. It is a side view which shows the state which hold | gripped the right fork and collar which comprise the front fork assembly which concerns on the said embodiment. It is a side view which shows the state which hold | gripped the right fork, collar, and wheel which comprise the front fork assembly which concerns on the said embodiment. It is a side view which shows the state which hold | gripped the right fork, collar, wheel, and brake panel which comprise the front fork assembly which concerns on the said embodiment. It is a side view which shows the state which hold | gripped the right fork, collar, wheel, brake panel, and left fork which comprise the front fork assembly which concerns on the said embodiment. It is a side view which shows the state which penetrated the axle through the assembly which comprises the front fork assembly which concerns on the said embodiment. It is a side view which shows the state which attached the stem to the assembly which comprises the front fork assembly which concerns on the said embodiment. It is a side view which shows the state which completed the front fork assembly which concerns on the said embodiment.

Explanation of symbols

10 Front fork assembly (assembly)
11A Right fork (first part)
151 Color (second part)
13 Wheel (third part)
14 Brake panel (fourth part)
11B Left fork (5th part)
22 Conveying means (conveying device)

Claims (1)

A method of assembling an assembly configured by laminating a first part located at the uppermost stage to an nth part (n is an integer of 2 or more) located at the lowermost stage,
A first procedure for gripping the first part by the conveying means;
An m-th procedure for gripping the m-th component while gripping the first to (m−1) -th components (m is an integer of 2 or more) by the transport means;
An assembly method for an assembly, wherein the assembly state of the assembly is realized in order by repeating the m-th procedure until m becomes 2 to n.

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