JPH03189096A - Holder of bicycle frame - Google Patents

Abstract

PURPOSE:To increase the degree of freedom of the holding position of a frame and to allow welding of required points by turnably supporting a plate for swinging on a work fixing jig provided separately from the holder. CONSTITUTION:A frame W is previously moved by a transporting robot 1 to the position where the fixing jig 150 does not interfere the frame at the time of turning in order to weld the points which cannot be welded by an ordinary robot. A pin 161a is previously inserted and fixed into an engaging hole 157a of the fixing jig 150 in order to fix the fixing jig to a stand 100. A cylinder 150 for swinging is then actuated to turn the plate 157 for swinging by a prescribed angle around a shaft 159 and, thereafter, a lock cylinder pin 161a is inserted to the other 157a and again the plate for swinging is held locked to the stand 100. The frame W is, therefore, held inclined by the swing angle thetaand is fixed in this state if the transporting robot is driven again to hold the frame. The welding of the part to be welded is then executed by the welding robot 20.

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to a motorcycle frame holding device used in an automatic welding device.

b. Prior Art Automatic welding equipment is used to weld frames of motorcycles. FIGS. 4 and 5 show an example of the apparatus and the working procedure. Reference numeral 1 is a workpiece transfer robot, and a workpiece holding jig 3 is attached to the tip of a rotatable arm 2.

As shown in FIG. 6, the holding jig 3 includes a clamp part 4 that clamps the head vibrator a of the two-wheeled vehicle frame W from its axial direction, and another clamp part 5 that is similarly inserted into a hole in the frame W from both sides and held there. and a frame 6 that connects both clamp parts, and the clamp part 4 has a pin 9 that can be expanded and contracted by a cylinder 8, and the other clamp part 5 also has a frame 6.
A pair of cylinders 10.11 each pin 12
．． 13 is configured to be expandable and retractable.

Reference numeral 15 indicates a workpiece stand before welding, 16 a workpiece stand after welding, and 20 a welding robot.

Drive the transport port l-1, move the holding jig 3 at the tip to the position of the frame W on the workpiece stand 15, and drive the pin 9 of the clamp part 4 to move the head vibe a part of the frame W. Clamp from the axial direction. At the same time, the pins 12 and 13 of the clamp part 5 are similarly driven and inserted into the left and right holes of the frame W, and are held therein. After moving this to a predetermined position, the welding port bot 20 welds the predetermined portions.

After welding, the frame W is moved to the workpiece stand I6, and after being placed on the stand, pins 9, 12. , 43, release the frame W, and return to the workpiece stand 1 with the workpiece to be welded.
5, the holding jig 3 is moved and the same operation is repeated.

In this holding device, since the frame 6 and the clamp part 5 are provided at the tip of the clamp part 4, the weight is large.
Therefore, a robot l with a large carrying capacity is required.

In addition, since the position of the pin in each clamp portion is determined by the frame 6, this holding device is required for each model and has to be replaced.

Therefore, a device as shown in FIGS. 2 and 3 was proposed. That is, in the figure, 30 is arm 2 of robot l.
This holding jig 30 is equipped with a frame 31, a fixed pin 32, a movable pin 33 facing this, and a cylinder 34 that drives the movable pin 33 up and down. A pair of steady rest plates 35 further swing.
It is equipped with 36.

The steady rest plates 35, 36 are each supported by arms 37, 38, the bases of which are each fixed to a gear wheel 39, 40. The gears 39 and 40 are arranged to mesh with each other and are configured to rotate the gear 39 by means of another drive gear 41. 42 is a drive motor for the drive gear 41. That is, with this configuration, the steady rest plates 35, 36 operate to open and close at the same time.

Reference numeral 50 denotes a fixing jig, which is provided separately from the holding device, and fixes the fixed bottle 51 and the movable pin 52 to the frame 53.5.
The fixing jig 5o is installed at the welding position by the welding robot 20.

55 is a cylinder that drives the movable pin 52.

This device moves the arm of the workpiece transfer robot 1 toward the workpiece stand 15 in the same manner as the conventional device, and pins 3 and 3.
3 and the fixed bin 32, and then the steady rest plates 35 and 36 are swung, and the held frame W is held down from both sides so that it does not swing to the left or right.

In this state, move the frame W to the place where the fixing jig 5o is installed, and fix the pair of hole portions of the frame W between the fixing pin 51 and the movable pin 52 of the fixing jig 50. ing.

C1 Problems to be Solved by the Invention However, in the proposed device, there was a problem in that the degree of freedom in holding the frame W was small, and as a result, it was impossible to weld at necessary locations.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a frame holding device for a two-wheeled vehicle that solves the above problems.

d. Means for Solving the Problems In accordance with the above object, the present invention provides a workpiece fixing system provided separately from the holding device when a two-wheeled vehicle frame is moved and fixed in a predetermined position by a transfer robot equipped with a holding device. A two-wheeled vehicle frame characterized in that a swing plate is provided on a swing jig, the swing plate is rotatably and pivotably supported, and a swing means for the swing plate and a lock means for locking the swing plate at a predetermined swing position are provided. The above-mentioned problem has been solved by using a holding device of this type.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Note that the same members as in each of the above-mentioned conventional examples are given the same reference numerals, and explanations thereof will be omitted.

In FIG. 1, 150 is a fixing jig, and 100 is a fixing stand that locks the fixing jig 150.

The fixing jig 150 includes a fixed bottle 151 and a movable pin 15.
2 are connected to each other in a U-shape 153 and 154.
A cylinder 155 is provided on the frame 154 to face each other and further drive the movable pin 152.

Reference numeral 157 denotes a swing plate vertically fixed to the lower part of the fixing jig 150, and the swing plate 157 is rotatable via a shaft 159 on a pair of bearing frames 158 vertically fixed on the fixed stand 100. supported,
Its lower end extends to the back side of the fixed stand 100.

Further, the swing plate 157 has a plurality of retaining holes 157a spaced apart from each other on the periphery of the lower end, and the swing cylinder 157 is provided near the swing plate 157.
0 .

161 is a lock cylinder, and a pin 161 is inserted into and removed from an engagement hole 157a provided in the swing plate 157.
It is equipped with a. The swing cylinder 160 and the lock cylinder 161 are supported by frames 162 and 163 provided on the back side of the fixed stand 100, respectively.

First, the arm 2 of the workpiece transfer robot 1 is moved to hold the frame W with the holding jig 30, which is configured similarly to the device shown in FIGS. 2 and 3. Move to 150. The pair of holes in the frame W are connected to the fixed pin 151 and movable pin 15 of the fixing jig 150.
The welding robot 20 is then moved to perform welding at predetermined locations. The operations up to this point are the same as those of the apparatus shown in FIGS. 2 and 3.

Next, in order to weld parts that cannot be welded in the above state, first, the cylinder 155 of the fixing jig 150 is driven to release the fixed state of the frame W between the fixed pin 151 and the movable pin 152. , the frame W is moved by the transport robot 1 to a position where the fixing jig 150 does not interfere with rotation (described later).

Next, in response to a command from the transfer robot 1, the lock cylinder 161 is driven, and the pin 161a, which was previously inserted into the engagement hole 157a of the swing plate 157, is pulled out to release the locked state of the swing plate 157. That is, in order to fix the fixing jig 150 to the stand 100, the bottle 161 is inserted into the engagement hole 157a in advance.
Insert and fix a.

Next, the swing cylinder 160 is operated, and the swing plate 157 is moved by a predetermined angle (swing angle θ) to the axis 1.
59, then insert the pin 1 of the lock cylinder 161 into the other engagement hole 157a provided there.
61a, and the swing plate 157 is locked to the stand 100 again.

Therefore, the fixing jig 150 is fixed to the fixed stand lOO in a tilted state by the swing angle θ.

Therefore, if the transfer robot 1 is driven again and the frame W being held is set on the fixing jig 150, the frame W will be fixed in a tilted state by the swing angle θ.

Therefore, the welding robot 20 may weld the target portion of the frame W in this state.

Thereafter, repeat the same procedure and perform welding by changing the swing angle as appropriate.

e. Effects of the Invention As described above, in a motorcycle frame holding device in which the fixed side jig is provided separately from the holding device, according to the present invention, the degree of freedom in the posture of the work to be fixed is increased, and weldable parts can be welded. Therefore, the automation rate for welding motorcycle frames will increase and efficiency will increase.

[Brief explanation of drawings]

Fig. 1 is a perspective explanatory view of a motorcycle frame holding device according to the present invention, Fig. 2 is an explanatory view of the operation of the conventional device, and Fig. 3 is a
FIG. 4 is an explanatory diagram of the operation of another conventional device; FIG. 5 is a perspective explanatory diagram of the retaining device portion of the device shown in FIG. 4; and FIG. 6 is a two-wheeled vehicle frame. FIG. DESCRIPTION OF SYMBOLS 1... Transfer robot, 100... Fixed stand, 150... Fixing jig, 157... Swing plate.

Claims (1)

[Claims] When a two-wheeled vehicle frame is moved and fixed in a predetermined position by a transfer robot equipped with a holding device, a swing plate is provided on a workpiece fixing jig provided separately from the holding device, and the swing plate is rotated. What is claimed is: 1. A holding device for a two-wheeled vehicle frame, characterized in that it is movably supported on a shaft, and is provided with swing means and a locking means for locking the frame at a predetermined swing position.