JPS6213193B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle body number marking device used, for example, in a motorcycle body assembly line.

Motorcycles are produced in many models and with many specifications due to the diversification of users. Therefore, motorcycle assembly lines are no longer dedicated as in the past, but many models and different specifications of motorcycles are produced on the same line. The reality is that we are assembling. Furthermore, in order to reduce inventory and shorten delivery times, we
The system is based on one lot of motorcycles, with multiple models and specifications of motorcycles running on the assembly line.

On the other hand, the body number of motorcycles differs depending on the model and specifications, so if the above production method is adopted, it is necessary to have as many body number engraving devices as there are models and specifications, which requires a large amount of equipment. It requires money, and also a large space and area. Each time the model specifications increased, a vehicle number engraving device had to be added, and the layout had to be changed to secure the space, which was extremely uneconomical.

The present invention aims to avoid the above-mentioned problems, and includes a clamping mechanism for a car body part that is engraved on a car body assembly line, and a slide base that moves back and forth in opposition to the clamped car body part and has a numbering unit at the tip of the car body side. The clamping mechanism is equipped with a pair of rotary rotating tables to which a plurality of chucks are fixed, so that at least one pair of chucks face each other, and the rotation of the rotating table is a one-touch operation that rotates against the spring force. On the other hand, the numbering unit is equipped with multiple rotary numbering heads, and the setting of the numbering head to the marking position can be automatically changed using a push button device, so that it can be adapted to the model each time it changes. Chuck (jig)
The feature is that the numbering head can be freely selected. When applying the present invention to a motorcycle number engraving device, since the engraving is generally attached to the head pipe, the clamping mechanism of the head pipe also serves as an upper and lower jig (chuck) for press-fitting the one (outer race) for receiving the head bearing. be able to. If the size of the head bearing changes depending on the model, the jig and numbering head can be quickly selected and positioned according to the model by rotating the rotary table automatically or manually using a push button device using a select setting device. I try to do it. Next, it will be explained with reference to the drawings.

FIG. 1 is a front view with a partial vertical section of a marking device 1 according to the present invention, which is installed next to a motorcycle body assembly line, and a frame 2 is a clamping mechanism for clamping a head pipe 3 in the marking position shown. 4, and a slide base 6 having a numbering unit 5 on the head pipe 3 side. For example, a car body assembly line extends in the space 7 on the right side of the frame 2 in a direction perpendicular to the plane of the paper, and a worker uses a hoist or the like to hoist the car body (pipe frame) on the line approaching the marking device 1, and then attaches the head pipe 3. Set it in the position shown while adjusting it to a vertical position.

The clamping mechanism 4 is divided into an upper and a lower part, and a rod 10 of a setting cylinder 9 fixed vertically to the lower end of the frame 2 is connected to a press-fitting rod 12 in a bearing block 11 fixed to the upper frame of the cylinder 9. The head 13 at the upper end of the press-fit rod 12 faces the space 7 side and has a guide surface 14 inclined downward to the right at an angle of 45 degrees, and a guide surface 14 that is perpendicular to the guide surface 14 in the center of the guide surface 14. Upright spindle 15
A lower rotary table 16 is supported on a support shaft 15 so as to be indexable into quarters at 90° intervals. Press-fit rod 12
A pin 17 fixed to the bearing block 11 engages with a slit 18 provided in the bearing block 11 to prevent the press-fit rod 12 from rotating. The rotary table 16 is generally a truncated four-sided pyramid centered on the spindle 15, and one side and the opposite side form an apex angle of 90°, and an indexing mechanism to be described later allows one side to be used as the first As shown in the figure, when the rotating table 16 assumes a horizontal position at the upper end, the opposite side surface assumes a vertical position. And the rotary table 16 is the spindle 1
When indexed in 90° increments around 5,
The side surfaces of the pyramids become horizontal at the upper end of the rotary table 16. There is a jig (chuck) for holding a two-step circular lace in the center of each side of the four square weights.
19, 19a, 19b, and 19c (not shown) stand up at right angles, and therefore, these chucks can be rotated sequentially by turning the turntable 16 by 90 degrees.
It assumes a vertical position at the upper end of 6. The chuck 19 at the upper end has a size and shape that matches the lower head bearing support portion 20 of the head pipe 3 of a specific model, but other chucks 19a, 19b...
The chuck 19 is different in size and shape, and each has a shape that is compatible with a head pipe of a different model. Therefore, one rotating table 16 can support four types of head pipes.

As shown in FIG. 2, the chuck 19 has a small diameter part 22 with an annular stepped part 21 separated from it at the upper end.A one (outer race) 23 to be press-fitted into the head bearing support part 20 is fitted into the small diameter part 22, and the stepped part 21 I support it. In this state, when the head pipe 3 is lowered by the upper clamp mechanism described later, the support part 2
0, and finally the support part 20 is fitted into the main body of the chuck 19, and the main body of the head pipe 3 is fitted into the small diameter part 22, and the press-fitting process of the one 23 is completed.

A press-fitting cylinder 25 is installed vertically on the frame 2 above the head pipe 3, and its rod 26 is connected to the head 2 through a press-fitting rod 27.
Similarly to the head 13, the head 28 is provided with a support shaft 15, and a rotary table 16 is supported on the support shaft 15 so as to be freely indexable into quarters. The press-fitting rod 27 is supported by a bearing block 29 so that it can only move up and down.

In Figure 3 showing the details of the head 28 section, 3.
0 is a radial key fixed to the guide surface 14, 31 is a radial groove provided on the rotary table 16 side, and 32 is a support shaft 1.
The outward flange 33 provided at the tip of 5 is a coil spring compressed between the flange 32 and the rotary table 16. The guide surface 14 has an inclination of 45°, and the support shaft 15
is perpendicular to the guide surface 14, and the key 30 and the groove 31 are positioned within a perpendicular plane containing the center line of the support shaft 15 (the plane of the paper in FIG. 3) and a plane perpendicular thereto.
Grasp the rotary table 16, pull it in the direction of the arrow against the elasticity of the spring 33, and rotate it in any direction around the support shaft 15. When the rotary table 16 rotates exactly 90 degrees, the groove 31 engages with another adjacent key 30. , the 90° index is completed, and instead of the chuck 19 that had previously projected vertically downward from the lower end of the rotary table 16, another chuck assumes a vertical position at the lower end of the rotary table 16. Each chuck has an annular magnet 3 to hold the wand 23.
It has 4 built-in.

In order to clamp the head pipe 3, the first
With the one corresponding to the upper chuck 19 in the figure adsorbed, for example, hydraulic pressure is supplied to the setting cylinder 9 to lift the head 13 and attach the head pipe 3.
Lightly engage the upper end of the upper chuck 19 in the same manner as shown in FIG. Continue with the upper press-fitting cylinder 25
By supplying hydraulic pressure to the head 28, lowering the head 28, and regulating the position of the head 13 by a stopper 35, the wand 23 is press-fitted into the upper and lower ends of the head pipe 3, and at the same time, the head pipe 3 is clamped by the upper and lower chucks 19.

The slide base 6 is supported by a pair of rails 37 provided parallel to the upper and lower positions of the frame 2 so as to be slidable in the left-right direction, and a pressing cylinder 39 is attached to a bracket 38 fixed to the frame 2. A rod 40 is connected to the slide base 6 so that the numbering unit 5 can be pressed against the head pipe 3 when the slide base 6 is moved from the standby position shown in FIG. 1 to the right. A holder 41 supporting the numbering unit 5 is supported on the slide base 6 so as to be movable up and down, and the holder 41 is connected to a rod 43 of a marking cylinder 42 fixed to the lower end of the slide base 6. 44 is pinion, 4
5 is a sector, both of which are connected to the support shaft 4 on the holder 41.
6 and 47 and mesh with each other, and the pinion 44 meshes with a rack 48 on the slide base 6 side.

In FIG. 4, which shows a cross-section of FIG. The clutch 53 meshes with a bevel gear 54 and is connected to a motor 55.

A rotary table 57 is mounted on the support shaft 47 via a key 56.
(boss) is attached to this rotary table 57.
Four numbering heads 58, 58a at ゜ intervals
(Fig. 5), 58b and 58c are detachably attached. A joint flange 59 is slidably fitted to the other end of the support shaft 47 via a key 60. 61b fits into the hole 62 of the sector 45 to prevent rotation of the sector 45 with respect to the support shaft 47. A bell crank-shaped shift fork 63 and a magnet 64 are provided for sliding the flange 59. The center portion of the shift fork 63 is supported by a bracket 66 via a pin 65, and one end is connected to the magnet 64 via a pin 67. The other end of the bifurcated shape has its tip clamping a diametrical pin 69 provided in the cylindrical portion of the flange 59 . The magnet 64 is not energized, so the iron core 68 protrudes due to the elasticity of the built-in spring, and the shift fork 63 receives a counterclockwise force centered on the pin 65, causing the knock pin 61b to enter the hole 62. Keep it in the inserted state.

To switch the numbering head 58,
The magnet 64 is energized to attract the iron core 68,
With the knock pin 64b removed from the hole 62, the motor 55 is started, and the clutch 53, bevel gears 54, 5
2 to rotate the support shaft 47 in one direction. A limit switch (not shown) disengages the clutch 53 each time the support shaft 47 rotates 90 degrees, thereby cutting off the power supply to the magnet 64. As a result, the numbering head 58 facing the head pipe can be freely selected from four types.

In order to make each numbering head 58, 58a to 58c detachable from the rotary table 57, the head 58 is sandwiched between outward flanges 71, 71 provided at both ends of the rotary table 57 (boss) as shown in FIG. , a plurality of positioning balls 72 and one locking pin 7
Engage 3. The ball 72 receives the elastic force of the coil spring 74 in the hole provided in the flange 71 and engages with the recess 75 at the corresponding position of the head 58. The lock pin 73 passes through a hole 76 in the flange 71 and fits into a hole 77 on the head 58 side. 78 is an outward flange provided on the lock pin 73, 79 is a spring case fixed to the rotary table 57, and 80 is the case 7.
9 and the flange 78.

To remove the head 58, pull the lock pin 73 to the left in FIG. 6 against the elasticity of the spring 80, and then pull the head 58 out from between the flanges 71, 71.

From the state shown in FIG. 1, oil pressure is supplied to the cylinder 39 to push the slide base 6 to the right, and the numbering head 58 is pressed against the head pipe 3. When hydraulic pressure is supplied to the marking cylinder 42 in this state, the holder 41 rises together with the support shaft 46, the pinion 44 that engages with the rack 48 rotates to the left, and the sector 45 that engages with the pinion 44 rotates to the right. The characters and symbols on the head 58 are sequentially stamped on the head pipe 3. Each numbering head 5
8 is designed so that the number increases each time it is stamped, and if the same model continues, the same numbering head 58 is used repeatedly, but when the model changes, the numbering head 58 is switched as described above and a different one is used. The head 58a is opposed to the head pipe 3. At that time, the chuck 19 of the clamp mechanism 4 is also switched as required.

The numbering head and one press-fitting jig for the upper and lower bearing receivers placed on the rotary table each use the structure shown in the diagram or a leaf spring, etc., and can be removed and installed in one action, even while the device is in operation. , all but one set in use can be installed and removed. Therefore, even when assembling a model other than the model set on the rotary table, it is possible to set the numbering head and one press-fit jig upper and lower parts for bearing receivers of that model on the rotary table, and to stamp the head number with less time loss. can. According to the present invention, even if there are many models,
If you prepare a numbering head for each model and one press-fit jig for the upper and lower bearing holders, there will be no problem with line work.

When many types of machines are used on the same machine, there are many errors. Therefore, in order to prevent this error, it is convenient to illuminate the stamped characters of the numbering head that has come to the vehicle body number stamping position with a spotlight to make it easier for the operator to read. It is even more effective to transfer it to a display board made of frosted glass or the like of a car body number stamping device using an optical device. During work, after checking the characters printed on the display board or highlighted with a spotlight, set the motorcycle body,
engrave.

The order of work performed by this device is as follows: First, depending on the model of the machine to be worked on, a predetermined numbering head and one press-fitting jig for upper and lower bearing receivers are called automatically or manually using the select button. Then, check the embossed characters on the display board or numbering head, and set the upper and lower bearing receivers on the jig. A magnet is attached to the jig so that the bearing receiving one can be set quickly, so the upper and lower ones can be easily set and will not fall. Then, set the motorcycle body onto the motorcycle body that is attached to the one press fitting jig for upper and lower bearing receivers. Then press the start button on the number stamping device to activate the device.
The device operates by lowering the upper bearing receiving one press-fitting device using hydraulic pressure, etc., and press-fitting the upper and lower bearing receiving ones into the head portion of the motorcycle body. When it is completely press-fitted, it remains in that state and the number stamping device continues to move forward. At that time, the number stamping device becomes locked and stamps the number on the motorcycle body. When the engraving is completed, the number stamping device moves back, advances one number, and releases the lock. At the same time, the upper bearing receiver press-fit device rises and comes off from the motorcycle body.

During the above operation, if the corresponding numbering head and jig are not set on the rotary table even though the model specifications of the next car body to be engraved are known, the numbering head and jig for that model will be set. and the jig, and if using the automatic method using the select button, press the select button. Then, as soon as the operation is completed, the turntable rotates and calls out the numbering head and jig that were set earlier. In the case of manual operation, operate the rotary table after the operation is completed,
Call the desired numbering head and jig in the same way.

As explained above, according to the present invention, it is easy to replace the model, so it is possible to use many different models, resulting in a huge saving in equipment costs and space.
It is also very effective in terms of man-hours.

[Brief explanation of the drawing]

1 is a front view of the device according to the present invention, FIG. 2 is an enlarged view of part A in FIG. 1, FIG. 3 is a partially enlarged view of FIG. 1, and FIG. 4 is a cross-sectional view of FIG. FIG. 5 is a cross-sectional view taken along the line shown in FIG. 4, and FIG. 6 is a partial cross-sectional view of the numbering head attaching/detaching device. 3... Head pipe (vehicle body part), 4... Clamp mechanism, 5
...Numbering unit, 6...Slide base, 19...Chuck (jig), 58...Numbering head.

Claims (1)

[Claims] 1 A car body assembly line is equipped with a clamping mechanism for car body parts that is stamped, and a slide base that moves back and forth in opposition to the clamped car body part and has a numbering unit at the tip on the car body side, and the clamp mechanism has a plurality of chucks. A pair of fixed rotary-type turntables are provided so that at least one pair of chucks face each other, and the turntable can be rotated with a single touch by simply rotating it against the spring force. Provide multiple numbering heads,
A car body number stamping device characterized in that the setting of the numbering head marking position can be automatically changed by a push button device, and each time the model changes, the selection can be made between the numbering head and the numbering head corresponding to the model. .