JP2001340962A - Method and apparatus for assembling auto-bicycle body frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for assembling an auto-bicycle body frame by welding front and rear frame assemblies which reduces equipment expenses by imparting versatility. SOLUTION: The method for assembling the auto-bicycle body frame is constituted of a step for positioning right and left rear portion of a front frame assembly FF by a pair of front side positioning means 125 which is movable in at least width direction of a body frame F, a step for clamping a head pipe 25 by front side cramping means 50 which is movable in up-down and front-back direction of the body frame F and tilt-able in front-back direction, a step for positioning the left and right rear portion of a rear frame assembly FR by a pair of rear side positioning means 90 which is movable in up-down, width and front-back direction of the body frame F, a step for cramping left and right front portion of the rear frame assembly FR by a pair of rear side cramping means 130 which is movable in front-back, width and up-down direction of the body frame F, and a step for welding the front portion and rear portion frame assemblies FF, FR each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved method and apparatus for assembling a motorcycle body frame by welding a front frame assembly having a head pipe at a front end and a rear frame assembly.

[0002]

2. Description of the Related Art Conventionally, a method for assembling a body frame for a motorcycle is known, for example, from Japanese Patent Publication No. 4-749, in which a center member such as a head pipe and a cross member is attached to a center jig. While holding the left and right side frames constituting the vehicle body frame in cooperation with the center member with a pair of left and right side jigs, respectively, with the side jigs standing on both sides of the center jig. The body members are assembled by welding side members to both sides of the members.

[0003]

However, in the above-mentioned prior art, a dedicated center jig and a dedicated side jig corresponding to the type of the body frame are required, and a plurality of types of motorcycle frames are assembled. For this purpose, it is necessary to prepare a center jig and side jigs corresponding to each type, which increases the equipment cost.

The present invention has been made in view of the above circumstances, and has a versatility so as to be able to cope with assembling a plurality of types of body frames for motorcycles, thereby reducing equipment costs. It is an object of the present invention to provide a method and an apparatus for assembling a vehicle body frame.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, a first aspect of the present invention is to provide a motorcycle for motorcycles by welding a front frame assembly having a head pipe at a front end and a rear frame assembly. A first step of positioning the left and right rear portions of the front frame assembly by a pair of front side positioning means movable at least in a Y-axis direction set in a width direction of the body frame when assembling the body frame; The frame can be moved in the Z-axis and X-axis directions set in the up-down direction and the front-back direction, and Y
A second step of clamping the head pipe at the front end of the front frame assembly by the front side clamping means capable of tilting about an axis along the axis, and moving in the X-axis, Y-axis and Z-axis directions. A third step of positioning the left and right rear portions of the rear frame assembly by the pair of rear side positioning means enabled, and a pair of rear side clamping means capable of moving in the X-axis, Y-axis, and Z-axis directions; The fourth clamps the left and right front portions of the rear frame assembly with
And a fifth step of welding the rear and front frame assemblies positioned relative to the front frame assembly to each other.

According to such a method, the pair of front-side positioning means for positioning the left and right rear portions of the front frame assembly can be moved at least in the width direction of the motorcycle body frame. The front-side clamping means for clamping the head pipe at the front end of the front frame assembly is movable in the front-rear and up-down directions of the motorcycle body frame and tiltable in the front-rear direction. With the positioning by the front-side positioning means, the position and posture change of the head pipe accompanying the change of the type of the front frame assembly can be determined by moving the front-side clamp means in the front-rear and up-down directions and the Y-axis. The front frame assembly can be positioned and supported with high accuracy by being covered by tilting around. A pair of rear positioning means for positioning the left and right rear portions of the rear frame assembly can be moved in the front-rear, width and vertical directions of the motorcycle body frame, and a pair of rear portions for clamping the left and right front portions of the rear frame assembly. Since the side clamp means can be moved in the front-rear, width and vertical directions of the motorcycle body frame, the rear frame assembly can be accurately moved relative to the front frame assembly even when the type of the rear frame assembly changes. Positioning and support can be achieved, and versatility that can be used for assembling a plurality of types of motorcycle body frames can be obtained, thereby reducing equipment costs. Moreover, by welding the front frame assembly and the rear frame assembly whose relative positions are accurately determined to each other, a vehicle body frame with stable welding accuracy can be assembled. Also, by a pair of rear positioning means and a pair of rear clamping means,
Since the rear frame assembly is restrained while accurately determining the position with respect to the front frame assembly, even if welding distortion occurs on the rear frame assembly side, it is necessary to correct the distortion and assemble the motorcycle body frame with high accuracy. Can be.

According to a second aspect of the present invention, there is provided an assembling apparatus for assembling a motorcycle body frame by welding a front frame assembly having a head pipe at a front end and a rear frame assembly. A pair of front side positioning means for positioning the left and right rear portions of the front frame assembly, a front side clamping means for clamping the head pipe at the front end of the front frame assembly, and the right and left rear portions of the rear frame assembly A pair of rear-side positioning means, a pair of rear-side clamping means capable of clamping left and right front portions of the rear frame assembly, and at least the two front sides in a Y-axis direction set in a width direction of the vehicle body frame. A pair of front-side positioning driving means for respectively moving the positioning means, and a Z-axis and an X-axis set in the up-down direction and the front-back direction of the vehicle body frame A front-side clamp driving means that enables the front-side clamp means to move in the direction and tilts the front-side clamp means about an axis along the Y-axis; A pair of rear-side positioning drive means capable of respectively moving the rear-side positioning means in the axis and Z-axis directions, and a pair of rear-positioning drive means capable of moving the both rear-side clamping means in the X-axis, Y-axis and Z-axis directions, respectively The positions of the rear clamp driving means and the front-side positioning means, the front-side clamping means, the rear-positioning means, and the rear-side clamping means are preset according to the type of motorcycle body frame to be assembled. And a control unit for controlling the operation of each of the driving means so as to be at the set position.

According to such an apparatus, as the type of the motorcycle body frame to be assembled changes,
Since the pair of front-side positioning means, the front-side clamping means, the pair of rear-side positioning means, and the pair of rear-side clamping means are automatically moved to positions corresponding to the vehicle body frame, assembly of the motorcycle body frame. The method according to claim 1 can be appropriately performed with improved efficiency.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on one embodiment of the present invention shown in the attached drawings.

FIGS. 1 to 19 show an embodiment of the present invention. FIG. 1 is a perspective view of an example of a motorcycle body frame, and FIG. 2 is a vertical sectional side view of an assembling apparatus. 2-
FIG. 3 is a sectional view taken along line 2, FIG. 3 is a view taken in the direction of arrow 3 in FIG. 2 showing the upper half in an activated state and the lower half in a non-operated state, FIG. 5 is an enlarged view of FIG. 3 as viewed in the direction of arrow 5, FIG. 6 is a sectional view taken along line 6-6 of FIG. 5, and FIG.
7, FIG. 8 is a sectional view taken along line 8-8 of FIG. 7, and FIG. 9 is a sectional view of FIG.
9 is a sectional view taken along line 9-9, FIG. 10 is a sectional view taken along line 10-10 in FIG. 6, FIG. 11 is an enlarged sectional view taken along line 11-11 in FIG. 3, FIG. 11 is a sectional view taken along line 13-13, FIG. 14 is an enlarged sectional view taken along line 14-14 of FIG.
5 is an enlarged sectional view taken along line 15-15 of FIG. 11, FIG. 16 is an enlarged view taken along line 16-16 of FIG. 3, and FIG. 17 is 17-17 of FIG.
FIG. 18 is a sectional view taken along line 18-18 of FIG. 16, FIG.
9 is a block diagram showing a configuration of a control system of the assembling apparatus.

First, in FIG. 1, a motorcycle body frame F includes a head pipe 25 and a head pipe 25.
A front frame assembly FF including a single main pipe 26 extending rearward from the front and a pair of left and right down tubes 27, 27 having a front end connected to the head pipe 25 below the main pipe 26; A rear frame assembly FR is provided with a pair of left and right seat rails 28, 28, the front ends of which are welded to the rear part of the main pipe 26 and the rear ends of the down tubes 27, 27 are respectively welded.

The main pipe 26 is integrally formed with a rear inclined portion 26a extending rearward and downward from the head pipe 25, and a descending portion 26c which extends continuously downward from a rear end of the rear inclined portion 26a via a curved portion 26b. Is formed. The down tube 27 has a first cylindrical portion 27a that is inclined rearward and downward from the head pipe 25 and has a rear end formed substantially horizontal, and a front end that is substantially horizontal has a first cylindrical portion 27a.
And a second cylindrical portion 27b which is welded to the rear end and is formed so that the rear portion is inclined upward and rearward. In addition, both down tubes 27, 2
7 between the first cylindrical portions 27a, 27a.
Are provided, and the second tubular portions 2 of both down tubes 27, 27 are provided.
A cross member 30 is provided between 7b and 27b.

The rear end of the main pipe 26, that is, the descending portion 2
A central portion of the cross member 31 is continuously provided at a lower end of 6c. Both ends of the cross member 31 are continuously provided to a pair of left and right plate-shaped front support members 32, 32, respectively. The members 32, 32 are both down tubes 2
7 and 27 are fixed to intermediate portions of the second cylindrical portions 27b and 27b. Support cylinders 33, 33 for swingably supporting the front end of a swing arm for supporting the rear wheels are coaxially fixed to these front support members 32, 32. Are formed such that through-holes functioning as positioning holes 34, 34 for determining the positions of the front support members 32, 32 when assembling the body frame F are opened at both ends.

A pair of support cylinders 35, 35 for supporting a power unit and the like (not shown) are fixed to the first cylinder portions 27a, 27a of the down tubes 27, 27, respectively. Of the support tubes 35, 35, for example, through holes functioning as positioning holes 36, 36 for positioning the down tubes 27, 27 when assembling the body frame F are opened at both ends in the lower support cylinders 35, 35. Formed.

In the rear frame assembly FR, cross members 37, 38, 39, 40 are provided in order from the front side between the two seat rails 28, 28, and the two seats are adjacent to the rearmost cross member 40. Rails 28, 2
8, plate-shaped rear support members 41, 41 for supporting a tail lamp, a brake lamp, and the like are fixed. Moreover, through holes which function as positioning holes 42, 42 for determining the rear positions of the two seat rails 28 when assembling the body frame F are formed in the rear support members 41, 41 so that both ends are opened. Is done.

The rear frame assembly FR is formed by welding the front ends of the two seat rails 28 and 28 to the upper part of the descending portion 26c of the main pipe 26 of the front frame assembly FF, and by combining the front frame assembly FF. The rear ends of the second cylindrical portions 27b, 27b of the two down tubes 27, 27 are welded to the middle portions of the two seat rails 28, 28 at the rear ends, that is, the upper ends thereof, so that the front tube assembly FF is assembled. A motorcycle body frame F is configured.

2 and 3, the assembling apparatus for constructing the body frame F by welding the front frame assembly FF and the rear frame assembly FR to each other includes a base 44, The part frame assembly FF and the rear frame assembly FR are mutually welded on the base 44.

On the base 44, a front frame assembly FF
A head pipe holding device 45 for clamping and holding the head pipe 25 provided at the front end, and a pair of left and right front portions for positioning the front support members 32, 32 provided at the rear by the front frame assembly FF. Support member positioning devices 46, 46, a pair of left and right down tube positioning devices 47, 47 for positioning the front portions of the down tubes 27, 27 included in the front frame assembly FF, and a rear frame assembly FR are provided at the rear end. A pair of left and right rear support member positioning devices 48, 48 for positioning the rear support members 41, 41 provided on the rear portion, and a rear frame assembly FR
A pair of left and right seat rail holding devices 49, for clamping and holding the front portions of the seat rails 28, 28 included in
49 are provided.

The head pipe holding device 45 is provided with a front side clamping means 50 provided on a movable support frame 62 so that the head pipe 25 can be clamped from above and below, and a front and rear direction of a body frame F assembled on the base 44. For a front-side clamp capable of moving the front-side clamp means 50 in a certain X-axis direction and a Z-axis direction which is a vertical direction of the vehicle body frame F and tilting the front-side clamp means 50 back and forth. And driving means 51.

Referring to FIGS. 4 to 8 together, the front clamp driving means 51 includes a rail 52 fixed on the base 44 so as to extend along the X-axis direction, and the rail 52. A carriage 53 movable above, an electric motor 54 having an axis extending in the X-axis direction and fixedly arranged on the base 44,
The electric motor 54 converts the rotational force of the electric motor 54 into a linear driving force of the carriage 53 in the X-axis direction.
And a screw feed mechanism 55 provided between the carriage 53 and Z
A rail 56 extending in the axial direction, that is, in the vertical direction, and provided on the carriage 53, and a movable support frame 62 in which the front-side clamp means 50 is disposed can be tilted around the Y-axis, which is the width direction of the body frame F. A lifting / lowering platform 57 having a bracket 57a for supporting and capable of ascending / descending along the rail 56; an electric motor 58 having an axis extending along the Z axis and fixedly arranged on the carriage 53; A screw feed mechanism (not shown) provided between the electric motor 58 and the elevator 57 so as to convert the driving force into a linear driving force in the Z-axis direction of the elevator 57; A rotating frame 59 connected rotatably about an axis along the axis; an electric motor 60 having an axis arranged in the XY plane and fixedly arranged on the rotating frame 59; From A screw feed mechanism 61 provided between the electric motor 60 and the lower ends of the arms 63, 63 so as to convert the rotational force of the electric motor 60 into reciprocating rotational power of the pair of arms 63, 63. And

Such a front-side clamp driving means 51
According to this, the movable support frame 62 of the front side clamping means 50
Can be moved in the front-rear direction and the up-down direction of the body frame F, and can be tilted around the axis of the Y axis. When the type of the body frame F changes, the X axis of the head pipe 25 is changed. In response to the change in the position along the direction, the height of the head pipe 25 from the base 44, and the inclination angle of the head pipe 25, the front side clamping means 50 is moved to an arbitrary position corresponding to the position of the head pipe 25. Can be moved.

The movable support frame 62 has a frame plate 64 provided at right angles to upper and lower portions of the arms 63, 63 extending vertically, and a circular pivot connected to upper ends of the arms 63, 63. Plates 65, 65, and a rotating plate 65,
The central portion of 65 is supported on a bracket 57a of a lift 57 via support shafts 66, 66 extending along the Y-axis direction.

Referring to FIGS. 9 and 10, a plurality of front clamps 50 can be fitted to the lower ends of four or more types of head pipes 25, for example.
The support pins 67A, 67B, 67C, 67D and one of the support pins 67A to 67D are connected to the head pipe 25.
And a disk-shaped pin support plate 68 which is fixedly supported while being disposed at a lower position of the head pipe 25 and an upper end of the head pipe 25 having a lower end fitted to one of the support pins 67A to 67D. Engaging portion 69 that can be engaged regardless of the type of
a at the distal end and the support pins 67A to 67A.
A pressing member 69 capable of clamping the head pipe 29 with one of the D and a cylinder 70 for applying a pressing force for pressing the head pipe 25 from above to the pressing member 69.

The engaging portion 69a is formed in a tapered shape so that it can be inserted and engaged with the upper end of the head pipe 25 regardless of a change in the inner diameter of the upper end of the head pipe 25. The pressing member 69 is attached to one end of the arm 71.

On the other hand, when the frame plate 64 of the movable support frame 62 is in a position orthogonal to the axis of the head pipe 25, the cylinder 70 is set so that the axis of the cylinder 70 is parallel to the axis of the head pipe 25. A piston rod 70a fixed to the lower surface of the plate 64 and provided in the cylinder 70
Is connected to the other end of the arm 71 via a connecting pin 73 having an axis along the Y-axis.

The other end of the arm 71 is slidably fitted between a pair of cam plates 75, 75 fixed on a frame plate 64 with a pair of spacers 74, 74 interposed therebetween. The two cam plates 75, 75 are provided with cam holes 76, 76 respectively corresponding to each other.

The cam hole 76 is formed by connecting an upper end of a first hole 76a extending in parallel with the axis of the head pipe 25 to a second hole 76b inclined upward and away from the head pipe 25. And both cam holes 7
Rollers 77, 7 capable of rolling inside 6, 76
7 is supported by an intermediate portion of the arm 71 above the connecting pin 73. Below the rollers 77, 77, two cam holes 7 are provided.
Rollers 78, 78 that roll inside the rollers 6, 76 are arranged, and these rollers 78, 78 are supported at both ends of the connecting pin 73.

As the rollers 77, 77; 78, 78 roll in the cam holes 76, 76 by the expansion and contraction operation of the cylinder 70, the arm 71 is moved as shown by a chain line in FIG. While moving with the connecting pin 73, it rotates around the connecting pin 73. As a result, the pressing member 69 attached to one end of the arm 71 is attached to each of the support pins 67A to 67A.
Operate to clamp head pipe 25 between one of 67D.

The pin support plate 68 is connected to the head pipe 25.
Are arranged at a position below the head pipe 25 so as to be rotatable around an axis parallel to the axis of the pin support plate. An indexing mechanism 80 is connected to the pin support plate 68 in order to selectively bring one of the support pins 67 to 67D fixed to a plurality of places with a gap below the head pipe 25.

The index mechanism 80 includes a pin support plate 68
An index motor 81 fixed to the frame plate 64 so as to apply a rotating force to the frame, and a floating support disposed between the pin support plate 68 and the frame plate 64 by rotatably supporting the pin support plate 68. The bearing 83 is provided between the pin support plate 68 and the floating support 83.

The output shaft 81a of the index motor 81 passes through the center of the floating support 82 and is spline-coupled to the center of the pin support plate 68. That is, the pin support plate 68
Is connected to the output shaft 81a of the index motor 81 such that relative movement in the axial direction is possible and relative rotation about the axis is disabled.

A coil-shaped spring 84 surrounding the output shaft 81a is provided between the floating support 82 and the frame plate 64. The spring 84 applies a spring force to the floating support 82 and the pin support plate. 68 is urged to the side away from the frame plate 64. On the other hand, the base ends of the regulating shafts 85... Penetrating a plurality of places (two places in this embodiment) spaced apart in the circumferential direction of the floating support base 82 are fixed to the frame plate 64, and the regulating shafts 85. The frame plate 6 of the floating support 82 is
A regulating flange 85a that can abut on and engage with the surface opposite to the surface 4 is integrally provided. These restricting shafts 85 prevent the floating support 82 from rotating around the axis of the output shaft 81a, and the moving ends of the floating support 82 and the pin support 68 in the direction away from the frame plate 64. Be regulated. Further, the frame plate 64 is provided with a floating support 82 so as to allow relative sliding in a direction parallel to the axis of the output shaft 81a.
Is fixed, and when the pin support plate 68 abuts on the stopper 86, the frame plate 6
Pin support plate 68 and floating support 8 to the side close to 4
The moving end of No. 2 is regulated.

The pin support plate 68 is provided with guide cylinders 88 of the same number as the number of the support pins 67A to 67D fixed to the pin support plate 68 at equal intervals in the circumferential direction of the pin support plate 68. The base ends of the guide pins 87.
, And each of the guide pins 87... Penetrates the floating support 82 so as to be relatively slidable in the axial direction.

Moreover, the length of each guide pin 87... Is such that the floating support 82 and the pin support plate 68 are moved to the maximum in a direction away from the frame plate 64, that is, each regulating shaft 85.
Of the pin support plate 68 are detached from the respective guide cylinders 88.

In such an index mechanism 80, no force is applied to the pin support plate 68 from above, and the spring 84
The floating support 8 is moved to the side away from the frame plate 64 by the spring force of
When the pin 2 and the pin support plate 68 have moved to the maximum, the pin support plate 68 can be rotated by the operation of the index motor 81. However, when a force is applied to the pin support plate 68 from above, the pin support plate 68 and the floating support base 82 move until the tips of the guide pins 87 ... fit into the respective guide cylinders 88 ... of the pin support plate 68. In this state, the rotation of the pin support plate 68 is disabled, and the relative positions of the support pins 67A to 67D and the head pipe 25 along the circumferential direction of the pin support plate 68 can be maintained.

2 and 3, the rear support member positioning device 48 includes a rear side positioning means 90 for positioning the rear support member 41 provided in the rear frame assembly FR by using the positioning holes 42, A rear-side positioning drive unit 91 that can move the rear-side positioning unit 90 in the X-axis, Y-axis, and Z-axis directions.

The rear positioning drive means 91 includes a rail 92 fixed on the base 44 so as to extend along the X-axis direction, and a bogie 93 movable on the rail 92.
An electric motor 94 fixed to the base 44 having an axis extending in the X-axis direction, and converting the rotational force of the electric motor 94 into a linear driving force of the carriage 93 in the X-axis direction. In this manner, a screw feed mechanism (not shown) provided between the electric motor 94 and the carriage 93, a rail 95 provided on the carriage 93 extending in the Z-axis direction, that is, the up-down direction, and capable of moving up and down along the rail 95 A lifting table 96 and an electric motor 9 fixedly arranged on a rail 95 having an axis along the Z axis.
7 and a screw feed mechanism (not shown) provided between the electric motor 97 and the elevator 96 so as to convert the rotational force of the electric motor 97 into a linear driving force of the elevator 96 in the Z-axis direction. A rail 98 extending in the Y-axis direction so as to guide the movable support member 100 on which the rear-side positioning means 90 is disposed, and fixed to the lifting table 96; and a rail 98 having an axis along the Y-axis. Electric motor 99 fixed to
And a screw feed mechanism (not shown) provided between the electric motor 99 and the movable support 100.

Such a rear-side positioning drive means 91
According to this, the movable support 100 of the rear-side positioning means 90
Can be moved in the X-axis, Y-axis, and Z-axis directions, that is, in the front-back direction, the width direction, and the up-down direction of the body frame F, and as the type of the body frame F changes, the X-axis The rear-side positioning means 90 can be moved to any position corresponding to the position of the rear support member 41 in response to the change in the position and height along the Y-axis direction.

11 to 13, the rear-side positioning means 90 has a guide hole 101 corresponding to the positioning hole 42 of the rear support member 41 and the guide hole 101.
At the position corresponding to the positioning hole 42.
Guide wall 102 which can face the outer surface of
02 on the opposite side of the rear support member 41 from the guide hole 1
01, and a cylinder 103 arranged coaxially with the axis of the cylinder 101, the cylinder 103 and the guide wall 101 can be selectively intervened and fitted into the guide hole 101 which can be freely inserted and removed. A plurality of, for example, three movable rods 104 detachably connected to 103.
And a plurality of, for example, three types of positioning pins formed in a shape that can be fitted into the positioning holes 42 of the plurality of, for example, three types of the rear support members 41 and individually fixed to the other ends of the movable rods 104. 105A, 105B, 1
05C.

The movable support frame 100 has the guide wall 10
2 and a support wall 106 disposed so as to sandwich the rear support member 41 between the guide arm 102 and the support wall 106.
7 is fixed so as to extend in the Y-axis direction,
6, a receiving member 108 that enables the rear support member 41 to be sandwiched between the positioning pins 105A to 105C is fixed to the receiving member 108.
A bottomed receiving hole 1 that can receive the tip of A to 105C
09 is provided.

The guide wall 102 and the cylinder 103
A rod support plate 110 rotatable about an axis parallel to the axis of the guide hole 101 is disposed between the rod support plates 110. The rod support plate 110 includes a plurality of, for example, three arm portions 110.
are provided at a plurality of, for example, three places at equal intervals in the circumferential direction, and are formed, for example, in a substantially Y-shape.
Rod holding portions 111 provided at the tips of
, Each movable rod 104 is held so as to be able to slide in the axial direction.

In FIG. 14, each of the rod holding portions 111.
Is provided with a sliding hole 112 having an axis parallel to the guide hole 101 of the guide wall 102 so as to slidably fit the movable rods 104. Each movable rod 10
4 are provided with a single guide groove 113 extending in the axial direction, respectively, and a screw member 114 for fitting a tip portion into the guide groove 113 is provided in each of the rod holding portions 111.
Respectively. Thereby, each movable rod 104
Are held by the rod holding portions 111 so as to be able to slide in the axial direction while making rotation about the axis impossible.

An annular groove 115 having a V-shaped cross section is provided on the outer surface near the other end of each movable rod 104, that is, the outer surface near the positioning pins 105A to 105C. Each rod holding portion 111 has a storage hole 11 having an axis arranged on one diameter line of each movable rod 104.
6, 116 are provided, and a pair of spheres 117, 117 that come into contact with the outer surface of the movable rods 104, and springs 118, 118 that bias the spheres 117, 117 toward the movable rods 104, respectively. The storage holes 116 are stored in the storage holes 116, and the outer end of each of the storage holes 116 is
It is closed at 9,119. Thereby, the movable rod 104
… Is a positioning pin 105A attached to the other end side
When the spheres 117, 117 are resiliently engaged with the annular groove 115 when retracting to the side away from the receiving member 108, the retractable limit position of the movable rods 104. Become.

The cylinder 103 is mounted on a mounting plate 120 provided on the support arm 107, and
An index motor 121 having an axis parallel to 1 and fixedly supported by a mounting plate 120 is connected to the center of the rod supporting plate 110 at an equal distance from the index motor 121 to each of the movable rods 104. A bearing 122 is interposed between the rod support plate 110 and the index motor 121. That is, the rod support plate 110
Each of the movable rods 1 is rotatably driven by an index motor 121 and rotatably supported by the index motor 121.
04 are alternately provided between the cylinder 103 and the guide hole 101.

At the tip of the piston rod 121a provided in the index motor 121, an engagement portion 123 which is substantially T-shaped in a vertical plane is provided.
As shown in FIG.
And when the movable rod 104 is rotated in the direction in which the movable rod 104 is disposed between the guide holes 101, and when the movable rod 104 is rotated in the direction in which the movable rod 104 is disengaged from between the cylinder 103 and the guide hole 101. The engaging portion 12
3 so as to release the engagement with the substantially T-shaped engagement groove 1.
24 are provided respectively.

Therefore, each of the positioning pins 105A to 105A
5C, the movable rod 104 selected and brought between the cylinder 103 and the guide wall 102 is connected to the cylinder 103, and the guide hole 101 according to the extension operation of the cylinder 103.
It is fitted so that it can be inserted and removed.

2 and 3, the front support member positioning device 46 is used to position the front support member 32 provided in the front frame assembly FF by using the positioning holes 34 thereof. And a first front-side positioning drive means 126 capable of moving the first front-side positioning means 125, wherein the first front-side positioning means 125 is used for positioning the rear support member. Device 4
8 is basically the same as the rear-side positioning means 90.

The first front side positioning drive means 126
Is configured to move the first front-side positioning means 125 in at least the Y-axis direction among the X-axis, Y-axis, and Z-axis directions. In this embodiment, the first front-side positioning drive is performed. The means 126 is configured to move the first front side positioning means 125 in the X-axis and Y-axis directions.

In this manner, the first front side positioning means 125
Does not need to be moved in the X-axis direction and the Z-axis direction because the front support member positioning device 46 uses the front support member 32 provided in the front frame assembly FF as the first step when assembling the body frame F. This is based on the fact that the vehicle body frame F is assembled with the front support members 32, 32 as reference positions.

The down tube positioning device 47 includes a second front side positioning means 127 for positioning the down tube 27 provided in the front frame assembly FF by using the positioning holes 36, and a second front side positioning means 127. And a second front-side positioning drive means 128 which can move the rear support-member positioning device 48. The first positioning means 125 of the device 46 is basically the same as the positioning means 125,
The front-side positioning drive unit 128 is configured to move the second front-side positioning unit 127 in the X-axis, Y-axis, and Z-axis directions.

The seat rail holding device 49 includes a rear side clamping means 130 for clamping a front portion of the seat rail 28 provided in the rear frame assembly FR from above and below, and an X-axis and a Y-axis.
And a rear clamp driving means 131 which can move the rear clamp means 130 in the axial and Z-axis directions.

The rear clamp driving means 131 includes a rail 132 fixed on the base 44 so as to extend along the X-axis direction, a carriage 133 movable on the rail 132, and a X-axis direction. An electric motor 134 having an extended axis and fixedly arranged on the base 44;
Is converted into a linear driving force in the X-axis direction of the carriage 133 so that the electric motor 134 and the carriage 1
33, a rail 135 extending in the Z-axis direction, that is, the up-down direction, and provided on the carriage 133, a lifting platform 136 capable of moving up and down along the rail 135, and a Z-axis. An electric motor 137 having an axis along the axis and fixedly arranged on the rail 135;
7, a screw feed mechanism (not shown) provided between the electric motor 137 and the elevator 136 so as to convert the rotational force of the elevator 7 into a linear driving force in the Z-axis direction of the elevator 136; A movable support 140 on which 130 is disposed
A rail 138 extending in the Y-axis direction so as to guide the motor and fixed to the lift 136; an electric motor 139 having an axis along the Y-axis and fixed to the rail 138;
A screw feed mechanism (not shown) provided between the electric motor 139 and the movable support 140 is provided.

Such a rear-side clamp driving means 13
1, the movable support 1 of the rear side clamping means 130
40 can be moved in the X-axis, Y-axis, and Z-axis directions, that is, in the front-back direction, the width direction, and the up-down direction of the body frame F, and the X-axis and the In response to the change in the position and height along the Y-axis direction, the rear-side clamping means 13
0 can be moved to any position corresponding to the position of the seat rail 28.

In FIGS. 16 to 18, the rear clamp means 130 is movable by the rear clamp drive means 131 so as to be movable in the front-rear, width and vertical directions of the vehicle body frame F and can be stopped at any position. Body 14
0 and a movable support 140 which is formed in a substantially V-shape which is opened upward in a plane intersecting with the longitudinal direction of the seat rail 28 and is arranged below the seat rail 28.
A pressing member 142 supported by a movable support member 140 so as to be able to swing in the plane so as to sandwich the seat rail 28 between the receiving member 141 and the pressing member 142; A drive mechanism 143 is provided between the movable support 140 and the pressing member 142 so as to swing and drive the 142.

The pressing member 142 is rotatably supported by the movable support 140 via a support shaft 144 having an axis extending along the X axis. The seat rail 28 of the pressing member 142
The opposing surface 142a is formed in a shape that makes spherical contact with the seat rail 28. The surface 141a of the receiving member 141 facing the seat rail 28 is formed in a shape that makes spherical contact with the seat rail 28.

The driving mechanism 143 includes a connecting rod parallel to the support shaft 144 and the pin 145, the piston rod 146a of a cylinder 146 swingably supported by the movable support 140 by a pin 145 parallel to the support shaft 144. The pressing member 142 is connected to the pressing member 142 via the 147, and the pressing member 142
It will rotate around the axis of 44.

In FIG. 19, the head pipe holding device 4
5, the front-side clamping drive means 51, the left and right pair of front support member positioning devices 46, 46, the first front-side positioning drive means 126, 126, and the left and right pair of down tube positioning devices 47, 47. (2) Front-side positioning drive means 128, 128, rear-positioning drive means 91, 91 in a pair of left and right rear support member positioning devices 48, 48, and rear clamping drive in a pair of left and right seat rail holding devices 49, 49. Mean 13
1, 131 are operated and controlled by the control unit 150.

The control unit 150 includes the front clamp means 50 in the head pipe holding device 45, the first front positioning means 125 in the front support member positioning devices 46, 46, and both down tube positioning. Second front-side positioning means 12 in devices 47, 47
7,127, rear positioning means 90,90 in both rear support member positioning devices 48,48, and rear clamping means 1 in both seat rail holding devices 49,49.
The driving means 51, 91, 91, 126, 12 are set so that the positions of 30, 30 are set in advance according to the type of the motorcycle body frame F to be assembled.
6, 128, 128, 131, 131 are controlled. For this reason, in the storage unit provided in the control unit 150, the position coordinates of each part of each body frame F to be assembled are set in advance in correspondence with the model, and the storage unit is stored in accordance with the model of the body frame F to be assembled. Each of the driving means 51, 91, 9 based on the read position coordinates of each part.
1,126,126,128,128,131,131
Is controlled.

Next, the operation of this embodiment will be described. The front frame assembly FF having the head pipe 25 at the front end and the rear frame assembly FR are welded to each other so that the motorcycle body frame F is mounted on the base 44. In assembling, the following first to fifth steps are executed.

In the first step, it is possible to move at least in the Y-axis direction which is the width direction of the body frame F, and in this embodiment, it is possible to move in the X-axis direction and the Y-axis direction which are the front and rear directions of the body frame F. The front support members 32, 32, which are the left and right rear portions of the front frame assembly FF, are positioned by a pair of first front side positioning means 125, 125, and are movable in the X-axis and Y-axis directions. And a pair of second front-side positioning means 12 which are movable in the Z-axis direction which is the vertical direction of the body frame F.
7, 127, the down tubes 27, 27 of the front frame assembly FF are positioned. At this time, the Z axis and X
The front clamp means 50 which enables the movement in the axial direction and tilts around the axis along the Y axis is also arranged at a position corresponding to the head pipe 25, and the support provided in the front clamp means 50 is provided. One of the pins 67A to 67D is fitted to the lower end of the head pipe 25. Thereby, in the front side clamping means 50, the pin support plate 68
, The guide pins 87 are fitted into the guide cylinders 88, and the rotational position of the pin support plate 68 is fixed.

In the second step, the head pipe 25 is clamped and held from above and below by the front side clamping means 50. By such first and second steps, the front frame assembly FF is moved. It will be positioned and supported.

Moreover, a pair of first front side positioning means 125 for positioning the left and right rear portions of the front frame assembly FF,
The front-side clamping means 5 that allows the motor 125 to move at least in the width direction of the motorcycle body frame F and clamps the head pipe 25 at the front end of the front frame assembly FF.
0 is movable in the front-rear and up-down directions of the motorcycle body frame FF and tiltable in the front-rear direction, so that the left and right rear portions of the front frame assembly FF are moved by the first front-side positioning means 125, 125. With positioning,
The change in the position and posture of the head pipe 25 accompanying the change in the type of the front frame assembly FF is covered by the front and rear and vertical movements of the front side clamp means 50 and the tilt around the Y axis. The partial frame assembly FF can be accurately positioned and supported. Further, the down tubes 27, 27 of the front frame assembly FF are positioned by the pair of second front side positioning means 127, 127 movable in the X-axis, Y-axis, and Z-axis directions. The positioning support accuracy of the assembly FF can be further improved.

In the third step, the X axis, the Y axis and the Z axis
The left and right rear portions of the rear frame assembly FR are positioned by a pair of rear side positioning means 90, 90 capable of moving in the axial direction. In the fourth step, the rear frame assembly FR is moved in the X-axis, Y-axis, and Z-axis directions. The rear frame assembly FR by a pair of rear side clamping means
Clamp the left and right front part of.

In this manner, a pair of rear positioning means 90, 9 for positioning the left and right rear portions of the rear frame assembly FR.
0, a pair of rear-side clamping means 130, which are movable in the front-rear, width and vertical directions of the motorcycle body frame F, and clamp the left and right front portions of the rear frame assembly FR.
130 can be moved in the front-rear, width and vertical directions of the motorcycle body frame F, so that the front frame assembly FF can be changed even if the type of the rear frame assembly FR changes.
, The rear frame assembly FR can be positioned and supported with high accuracy, and versatility can be obtained so as to be compatible with assembling a plurality of types of motorcycle body frames F, thereby reducing equipment costs. .

In the fifth step, the body frame F is assembled by welding the front frame assembly FF and the rear frame assembly FR whose relative positions have been determined. At this time, the front frame assembly FF and the rear frame assembly FR whose relative positions are accurately determined are welded to each other, so that the vehicle body frame F with stable welding accuracy can be assembled.
Further, the rear frame assembly FR is restrained by the pair of rear positioning means 90, 90 and the pair of rear clamping means 130, 130 while accurately determining the position with respect to the front frame assembly FF.
Even if welding distortion occurs on the R side, the distortion can be corrected and the motorcycle body frame F can be accurately assembled.

Incidentally, a pair of first front side positioning driving means 126, 126 for moving the pair of first front side positioning means 125, 125 in the X-axis and Y-axis directions.
Operation and a pair of second front side positioning means 127, 12
Operation of a pair of second front-side positioning driving means 128, 128 for moving the X-ray 7 in the X-axis, Y-axis, and Z-axis directions;
The front-side clamp driving means 51 for moving the front-side clamp means 50 in the Z-axis and X-axis directions and tilting about the axis along the Y-axis, and the pair of rear-side positioning means 90, 90 for the X-axis , A pair of rear-side positioning driving means 91, 91 for moving in the Y-axis and Z-axis directions, and a pair of rear-side clamping means 130, 130 for X-axis,
The operation of the pair of rear-side clamp driving units 131 and 131 for moving in the Y-axis and Z-axis directions includes the first front-side positioning units 125 and 125 and the second front-side positioning unit 12.
8, 128, front clamping means 130, rear positioning means 90, 90 and rear clamping means 130, 1
The control unit 150 controls the position of 30 so as to be a position set in advance according to the type of the motorcycle body frame F to be assembled.

Accordingly, as the type of the motorcycle body frame F to be assembled changes, the first front-side positioning means 125, 125 and the second front-side positioning means 1
28, 128, front clamping means 130, rear positioning means 90, 90 and rear clamping means 130,
130 automatically moves to a position corresponding to the body frame F, and the assembling efficiency of the motorcycle body frame F can be improved.

The head pipe holding device 45 for clamping and holding the head pipe 25 provided at the front end of the front frame assembly FF includes a plurality of support pins which can be fitted to lower ends of a plurality of types of head pipes 25, respectively. 67A-67
D, a pin support plate 68 for fixedly supporting one of the support pins 67A to 67D at a position below the head pipe 25 and fitting the lower end to one of the support pins 67A to 67D. A pressing member 69 capable of engaging the upper end of the stiffened head pipe 25 regardless of the type of the head pipe 25 and capable of clamping the head pipe 25 with one of the support pins 67A to 67D; A pressing member 69 presses the head pipe 25 from above.
And a cylinder 70 to be provided.

Therefore, it is possible to clamp the head pipe 25 between one of the support pins 67A to 67D selected according to the head pipe 25 to be held and the pressing member 69 capable of supporting a plurality of types of head pipes 25. It is possible to provide the head pipe holding device 45 with versatility capable of coping with assembling a plurality of types of vehicle body frames F, thereby reducing equipment costs.

A piston rod 70 a of a cylinder 70, which has an axis parallel to the axis of the head pipe 25 and is arranged at a fixed position, is connected to the other end of an arm 71 having a pressing member 69 attached at one end via a connecting pin 73. A cam hole 7 is formed by connecting a second hole 76b inclined upward to the side away from the head pipe 25 toward the upper end of the first hole 76a extending parallel to the axis of the head pipe 25.
Rollers 77, 77 having cam plates 75, 75 each having a fixed position relative to the cylinder 70 and fixed to the movable support frame 62, and capable of rolling in the cam holes 76, 76. Are pivotally supported at an intermediate portion of the arm 71.

For this reason, in response to the rollers 77, 77 rolling in the cam holes 76, 76 in response to the expansion and contraction operation of the cylinder 70, the arm 71 moves with the connection pin 73 while using the connection pin 73 as a fulcrum. Rotate. At this time, the lower portion of the cam hole 76 is formed as a first hole portion 76a extending in parallel with the axis of the head pipe 25, and
When rolling in the hole 76a, the arm 70, that is, the pressing member 69 also moves parallel to the axis of the head pipe 25. Therefore, when the upper end of the head pipe 25 is pressed by the pressing member 69, the moving direction of the pressing member 69 can be set to the direction along the axis of the head pipe 25. 25 can be stably and reliably clamped between one of the support pins 67A to 67D and the pressing member 69.

Further, the pin support plate 68 which is rotatable about an axis parallel to the axis of the head pipe 25 and is disposed below the head pipe 25 has support pins 67A individually corresponding to a plurality of types of head pipes 25, respectively. ~ 67
D are fixed at a plurality of positions at equal intervals in the circumferential direction of the pin support plate 68, and one of the plurality of support pins 67A to 67D is positioned below the head pipe 25. An alternative indexing mechanism 80 is connected. Accordingly, as the type of the motorcycle body frame F to be assembled changes, the support pins 67A to 67A corresponding to the head pipe 25 change.
One of D can be automatically selected and brought below the head pipe 25, and the assembling efficiency can be improved.

The seat rail holding device 49 for forming a part of the motorcycle body frame F for clamping and holding the pipe-shaped seat rail 28 extending substantially in the front-rear direction of the body frame F is provided by the body frame F The movable support 140 is movable in the front, rear, width, and vertical directions, and can be stopped at an arbitrary position, and is formed in a substantially V-shape that opens upward in a plane that intersects the longitudinal direction of the seat rail 28. A receiving member 141 fixed to the movable support body 140 so as to be disposed below the seat rail 28,
A pressing member 142 supported by a movable support member 140 so as to be able to swing in the plane so as to sandwich the seat rail 28 between the receiving member 141 and the pressing member 1;
A drive mechanism 143 is provided between the movable support 140 and the pressing member 142 so as to swing and drive the 42.

Therefore, the seat rail 2 to be clamped
8, the receiving member 141 is fixedly arranged below the seat rail 28 at a position corresponding to the eight types, and the pressing member 142 is swung so as to sandwich the seat rail 28 between the receiving member 141 and the receiving member 141. Can be clamped regardless of changes in its outer diameter.

The receiving member 141 and the pressing member 142
The surface facing the seat rail 28 is formed in a shape that comes into spherical contact with the seat rail 28, so that the longitudinal direction of the seat rail 28 and the receiving member 141 and the pressing member 14
Even if the angle between the receiving member 141 and the pressing member 142 is slightly changed, the seat rail 2
8 can be reliably clamped.

Therefore, versatility capable of coping with the assembly of a plurality of types of vehicle body frames F can be imparted to the seat rail holding device 49, and the equipment cost can be reduced.

The rear support member 41, which forms a part of the motorcycle body frame F and has a positioning hole 42 extending in the width direction of the body frame F, is
The rear support member positioning device 48 for positioning using the guide wall 101 has a guide hole 101 and a guide wall 102 that can face the outer side surface of the rear support member 41 at a position corresponding to the guide hole 101 with the positioning hole 42. A cylinder 103 disposed coaxially with the axis of the guide hole 101 on the side opposite to the rear support member 41 with respect to the guide wall 102.
And a plurality of movable rods 104 which allow selective intervention between the cylinder 103 and the guide wall 102 and fitting into the guide hole 101 which can be inserted and removed, and one end of which is detachably connected to the cylinder 103. And a plurality of types of positioning pins 105A to 105A formed in shapes that can fit into the positioning holes 42 of the plurality of types of rear support members 41 and individually fixed to the other ends of the movable rods 104.
C.

Therefore, of the plurality of movable rods 104, the movable rod 104 having the positioning pins 105A to 105C corresponding to the rear support member 41 to be positioned.
Is selected and brought between the cylinder 103 and the guide wall 102, and is fitted in the guide hole 101 so as to be insertable and removable by coupling with the cylinder 103, and the positioning corresponding to the positioning hole 42 of the rear support member 41 to be positioned. The rear support member 41 can be positioned by properly fitting the pin into the guide hole 101, and the versatility that can cope with assembling a plurality of types of vehicle body frames F is imparted to the rear support member positioning device 48. And equipment cost can be reduced.

Further, the rod support plate 110 disposed between the guide wall 102 and the cylinder 103 is rotatable about an axis parallel to the axis of the guide hole 101, and is equally spaced in the circumferential direction of the rod support plate 110. The movable rods 104 are arranged so as to be slidable in a direction parallel to the axis of the guide hole 101, and one of the movable rods 104 is placed between the cylinder 103 and the guide hole 101. Index motor 12 for rotating rod support plate 110 so as to be able to provide an alternative
1 are connected.

For this reason, a plurality of types of positioning pins 105A
To 105C can be obtained with a simple structure by selecting one of them corresponding to the rear support member 41 to be positioned and bringing it to the position corresponding to the guide hole 101 with high accuracy.

Further, the front support member 32 which forms a part of the motorcycle body frame F and has the positioning hole 34 extending in the width direction of the vehicle body frame F, is used for positioning using the positioning hole 34. The positioning member 46 and the down tube 27 which constitutes a part of the motorcycle body frame F and has a positioning hole 36 extending in the width direction of the body frame F are positioned using the positioning hole 36. The down tube positioning device 47 of the rear support member positioning device 4
8 and the front support member positioning device 46 and the down tube positioning device 47 are provided with versatility capable of coping with the assembly of a plurality of types of vehicle body frames F to reduce equipment costs. Can be.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the appended claims. It is possible.

For example, in the above embodiment, in the first step, the front support members 32, 32, which are the left and right rear portions of the front frame assembly FF, are positioned by the pair of first front side positioning means 125, 125. Although the down tubes 27, 27 of the front frame assembly FF are positioned by the pair of second front side positioning means 127, 127, the pair of second front side positioning means 127, 12 is used.
7 down tube 2 of front frame assembly FF
The positioning of 7, 27 may be omitted, and at least the left and right rear portions of the front frame assembly FF may be positioned.

[0084]

As described above, according to the method of the first aspect, the front frame assembly can be accurately positioned and supported, and even if the type of the rear frame assembly changes, the front frame assembly can be changed. The rear frame assembly can be accurately positioned and supported with respect to the three-dimensional body, and versatility can be obtained so as to be compatible with assembling a plurality of types of motorcycle body frames, thereby reducing equipment costs. Moreover, by welding the front frame assembly and the rear frame assembly whose relative positions are accurately determined to each other, a vehicle body frame with stable welding accuracy can be assembled. Also, since the rear frame assembly is restrained while accurately determining the position with respect to the front frame assembly, even if welding distortion occurs on the rear frame assembly side, the distortion is corrected and the motorcycle body frame is assembled accurately. be able to.

According to the second aspect of the present invention, a pair of front-side positioning means, a front-side clamping means, and a pair of rear-side positioning means change in accordance with the type of the motorcycle frame to be assembled. The means and the pair of rear side clamping means are automatically moved to positions corresponding to the vehicle body frame to improve the assembling efficiency of the motorcycle body frame, so that the method according to claim 1 can be appropriately performed. .

[Brief description of the drawings]

FIG. 1 is a perspective view of an example of a motorcycle body frame.

FIG. 2 is a longitudinal sectional side view of the assembling apparatus, and is a sectional view taken along line 2-2 of FIG.

3 is a view taken in the direction of the arrow 3 in FIG. 2 showing an upper half in an operative state and a lower half in a non-operative state.

FIG. 4 is an enlarged sectional view taken along line 4-4 of FIG. 3;

FIG. 5 is an enlarged view of FIG.

FIG. 6 is a sectional view taken along line 6-6 in FIG. 5;

FIG. 7 is a sectional view taken along line 7-7 of FIG. 5;

FIG. 8 is a sectional view taken along line 8-8 in FIG. 7;

FIG. 9 is a sectional view taken along line 9-9 of FIG. 6;

FIG. 10 is a sectional view taken along line 10-10 of FIG. 6;

FIG. 11 is an enlarged sectional view taken along line 11-11 of FIG. 3;

FIG. 12 is a view taken in the direction of arrow 12 in FIG. 11;

FIG. 13 is a sectional view taken along line 13-13 of FIG. 11;

FIG. 14 is an enlarged sectional view taken along line 14-14 of FIG. 11;

FIG. 15 is an enlarged sectional view taken along line 15-15 of FIG. 11;

FIG. 16 is an enlarged view taken along line 16-16 of FIG. 3;

FIG. 17 is a sectional view taken along line 17-17 of FIG. 16;

18 is a sectional view taken along line 18-18 of FIG.

FIG. 19 is a block diagram showing a configuration of a control system of the assembling apparatus.

[Description of Signs] 25 ... Head pipe 50 ... Front-side clamping means 51 ... Driving means for front-side clamping 90 ... Rear-side positioning means 91 ... Driving means for rear-side positioning 125 ... front side positioning means 126 ... front side positioning driving means 130 ... rear side clamping means 131 ... rear side clamping driving means 150 ... control unit F ... for motorcycles Body frame FF: Front frame assembly FR: Rear frame assembly

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Teiji Miwa 1-10-1 Shinsayama, Sayama City, Saitama Prefecture Inside Honda Engineering Co., Ltd. (72) Inventor Isamu 1-10-1 Shinsayama, Sayama City, Saitama Prefecture Hondae Inside Engineering Co., Ltd. (72) Inventor Hoshihisa 1-10-1 Shinsayama, Sayama City, Saitama Prefecture Honda Engineering Co., Ltd. F-term (reference) 3D012 BE11 BF00 4E081 YC02

Claims (2)

[Claims] 1. A front frame assembly (FF) having a head pipe (25) at a front end, and a rear frame assembly (F).
R) and a pair of front-side positioning means (125) movable at least in the Y-axis direction set in the width direction of the body frame (F) when assembling the body frame (F) for the motorcycle by welding with the body frame (F). Front frame assembly (F
F), a first step of positioning the left and right rear portions, and a movement of the body frame (F) in the Z-axis and X-axis directions set in the up-down direction and the front-rear direction, and tilting around the axis along the Y-axis. A second step of clamping the head pipe (25) at the front end of the front frame assembly (FF) by the front side clamping means (50) that enables the movement, and moving in the X-axis, Y-axis, and Z-axis directions. A third positioning means for positioning the left and right rear portions of the rear frame assembly (FR) by a pair of rear positioning means (90) which enables the rear frame assembly;
And a fourth step of clamping the left and right front portions of the rear frame assembly (FR) with a pair of rear side clamping means (130) capable of moving in the X-axis, Y-axis and Z-axis directions. And a fifth step of welding the rear frame assembly (FR) and the front frame assembly (FF) positioned with respect to the front frame assembly (FF) to each other. How to assemble a vehicle body frame. 2. A front frame assembly (FF) having a head pipe (25) at a front end, and a rear frame assembly (F).
R) and a pair of front-side positioning means (125) for positioning the left and right rear portions of the front frame assembly (FF) by assembling the motorcycle body frame (F) by welding with the front frame assembly (F). Front clamping means (50) for clamping a head pipe (25) at the front end of the front frame assembly (FF), and a pair of rear sides for positioning the left and right rear parts of the rear frame assembly (FR). Positioning means (90) and a pair of rear clamping means (130) capable of clamping left and right front parts of the rear frame assembly (FR).
And at least both front side positioning means (125) in a Y-axis direction set in a width direction of the body frame (F).
And a pair of front-side positioning driving means (126) for moving the vehicle body frame (F), and front-side clamping means (50) in the Z-axis and X-axis directions set in the vertical and longitudinal directions of the body frame (F). And a X-axis, a Y-axis, a front-side clamp driving means (51) that enables the front-side clamp means (50) to be tilted about an axis along the Y-axis. A pair of rear-side positioning drive means (91) capable of moving the rear-positioning means (90) in the Z-axis direction, respectively;
The two rear-side clamping means (13
0), and a pair of rear clamp driving means (131) capable of moving each of them, and the both front positioning means (12).
5) The motorcycle body frame (F) in which the positions of the front side clamping means (50), both rear side positioning means (90) and both rear side clamping means (130) are to be assembled.
And a control unit (150) for controlling the operation of each of the driving means (51, 91, 126, 131) so as to be at a position set in advance according to the type of the vehicle. Assembly equipment.