JPH0453861Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Field of industrial application) This invention is based on the so-called front engine front wheel drive, for example.
This invention relates to a work support device for an assembly pallet for assembling a FF front drive shaft to a knuckle arm, disk plate, etc.

(Prior Art) Conventionally, as a work support device for an assembly pallet on which a drive shaft is assembled, there is a device described in, for example, Japanese Patent Laid-Open No. 62-84950.

That is, this is a device that press-fits a horizontally placed drive shaft into a material to be press-fitted from the side with respect to a knuckle arm held on a pallet, and assembles both of them.

Since this conventional device supports a relatively long drive shaft in a horizontal position,
The problem is that the support mechanism for the drive shaft becomes longer in the lateral direction, resulting in a larger installation space for the entire device.

(Purpose of the invention) This invention can reduce the installation space of the entire device and make the device smaller and more compact.In addition, when supporting a workpiece in a vertical position, the support tool can be automatically set to the support standby position. ,
The purpose of the present invention is to provide a workpiece support device for an assembly pallet that can securely support the workpieces.

(Structure of the invention) This invention consists of a supply means for vertically feeding a workpiece to a fixed position on a pallet, a support member erected on the pallet, and a rotation rotatably attached to the support member. a movable body, which is attached to the rotary body so as to be movable between a support position and a non-support position, and rotates together with the rotary body between a support standby position and a retracted position, and changes from the support standby position to a non-support position; A supporting tool that moves forward in a direction perpendicular to the workpiece to support the workpiece at a certain time, and rotates to a retracted position together with the rotating body when not supporting the workpiece, and a rotation operation means that rotates the supporting tool to a support standby position. and a pushing means for pushing the supporting tool which is at the supporting standby position and the non-supporting position to move it forward in a direction orthogonal to the workpiece.

(Effect of the invention) According to this invention, the workpiece is fed in a vertical position to a fixed position on the pallet by the above-mentioned feeding means, and then the support attached to the rotating body is moved from the retracted position by the rotating operation means. Upon rotation, the support is automatically oriented perpendicular to the workpiece, and then the support is advanced by the pushing means to support the workpiece. When not supported, the support tool rotates together with the rotating body to the retracted position.

In this way, since the above-mentioned workpiece was placed vertically,
This has the effect of preventing the entire device from becoming longer in the lateral direction as in the conventional case, thereby reducing the installation space of the device and making the device smaller and more compact.

In addition, the support tool can be automatically rotated from the retracted position to the support standby position using the rotation operation means, and the support tool moves forward in the orthogonal direction to support the workpiece placed vertically. can be reliably supported.

In addition, since the support is largely retracted when supplying and taking out the work, the support does not interfere with the supply and removal of the work, and therefore the work can be smoothly supplied and taken out. There are some effects that can be achieved.

(Example) An example of this invention will be described in detail below based on the drawings.

The drawing shows a workpiece support device for an assembly pallet. In FIG. A slider 4 that slides up and down, and a press-fitting cylinder 6 as a press-fitting means attached to the top of the slider 4 via a bracket 5.
, a lift table 8 attached to the lower part of the slider 4 mentioned above via a bracket 7, a pallet conveying device 10 using a chain mechanism disposed at the upper part of the other side of the base 1 via a conveying table 9, and this pallet conveying device 1.
A pallet 13 is conveyed along the left and right conveyance guides 11 and 12 by a robot arm 15 that feeds and grips a drive shaft 14 as a workpiece to a predetermined position on the pallet 13 in a vertical position. Support mechanism 1 as a support means for supporting the supplied drive shaft 14
6.

A lift cylinder 17 is attached to the side surface of the above-mentioned support column 2, and when the piston rod 18 of this lift cylinder 17 moves downward, the above-mentioned slider 4 is moved through a link 20 that rotates about a support shaft 19 and a chain 21. The pallet 13 is positioned by moving it upward and inserting the positioning pins 22, 22 at the upper end of the lift table 8 into the positioning holes 23, 23 of the pallet 13.

Furthermore, when the slider 4 is moved upward, the pushing cylinder 26 for advancing the support tool, which is attached to the side surface of the slider 4 via the brackets 24 and 25, faces the rear end of a support tool 64 (see FIG. 4), which will be described later. .

Further, a press-fit head 27 is fixed to the tip of the piston rod of the press-fit cylinder 6, while a press-fit rod 32 is fixed to the tip of the piston rod of the sub-press-fit cylinder 28 via brackets 29, 30, 31.
is fixed, and a press-fit cap 33 is attached to the lower end of this press-fit rod 32. Here, each of the above-mentioned brackets 29, 30, 31 is guided up and down by appropriate guide means (not shown).

A holding hole 34 for holding the upper end of the drive shaft 14 is formed in the press-fit cap 33, and
As the piston rods of the press-fit cylinder 6 and the sub-press-fit cylinder 28 move downward, the drive shaft 14 is moved onto the pallet 1 while holding the upper end of the drive shaft 14 with the press-fit cap 33 described above.
It is configured to be press-fitted into the object to be press-fitted above.

A jig 35 is installed on the pallet 13 mentioned above,
On this jig 35, as shown in FIGS. 2 and 3, a freewheel hub 36, a disc plate 37, a front wheel hub 38, a bearing 39, a knuckle arm 40, and a dust cover 41 are installed in advance. An integrally assembled press-fitted object 42 (hereinafter simply abbreviated as a workpiece) is held.

Then, when the press-fit cylinder 6 is operated, the spline shaft 43 of the drive shaft 14 and the spline hole 44 of the front wheel hub 38 are press-fitted.

Furthermore, an incorrect insertion prevention device 46 is disposed below the through hole 45 of the pallet 13, which can be pushed into and retracted into the through hole 45 by the operation of an elevating cylinder (not shown).

This incorrect insertion prevention device 46 includes a hollow inner rod 49 having a center guide pin 48 attached to the upper end via a shaft body 47, and a hollow inner rod 49.
The pin 52 protruding from the inner rod 49 is loosely inserted into the elongated hole 51 of the outer rod 50, while the outer rod A spring 55 for vertically moving the outer rod 50 is stretched between the flange portion 53 at the lower end of the rod 50 and a spring seat 54 below the spring seat 54, and in the vicinity of the above-mentioned flange portion 53, upper and lower 2 supports are supported by a frame 56. Two proximity switches 57 and 58 are provided.

Then, as shown in FIG.
If the diameter of the front wheel hub 38 is large, for example 27.4φ, the outer rod 5
0 is inserted into the spline hole 44, and the upper proximity switch 57 is turned on at the flange portion 53. Meanwhile, as shown in FIG.
For example, if the front wheel hub 38 has a small diameter of 25.4φ, the outer rod 5
0 upper end is not inserted into the spline hole 44, and the lower proximity switch 58 is inserted at the flange portion 53.
It becomes ON.

A robot (not shown) that controls the aforementioned robot arm 15 stores workpiece type data corresponding to the workpiece 42 in advance, and receives both signals from this robot and signals from each of the aforementioned proximity switches 57 and 58. By comparison, if the signals match, an OK signal is output, and if they do not match, an NG signal is output and the press-fitting process is stopped, thereby preventing incorrect fitting.

The support mechanism 16 on the pallet 13 mentioned above is the first
The configuration is as shown in FIGS. 4 to 9.

That is, an L-shaped support member 59 is erected and fixed on the upper part of the pallet 13, and a cam 60 is bolted and fixed to the upper horizontal shaft part of this support member 59, and the leg part 62 of the rotary body 61 is moved up and down. It is movably installed.

A total of three mutually parallel rods 66 are integrated into the through hole 63 formed in the rotating body 61 described above and are integrated with the support 64 and the bracket 65 at the rear end.
... is inserted.

Then, a part of the center through-hole 63 among the above-mentioned through-holes 63 is set to have a large diameter so that the spring chamber 6
7, and a return spring 68 is stretched between this spring chamber 67 and the above-mentioned bracket 65.

This return spring 68 is connected to the bracket 65.
5. This is a spring for returning from the solid line position in FIG. 5 to the imaginary line direction in the same figure.

Also, one of the three rods 66 described above has a lock portion 7 of the lock pin 69 in the drive shaft gripping position of the support 64.
An engagement groove 71 into which the 0 is engaged is formed.

When the aforementioned rotating body 61 rotates to a downward horizontal position perpendicular to the drive shaft 14, in other words, when the supporter 64 rotates to the support standby position, the supporter 64
is in an unsupported position, and this support 64 is connected to the push-in cylinder 2 that presses the bracket 65 at the rear end.
6 (see Figure 1), the drive shaft 1 moves forward in the direction orthogonal to the drive shaft 14.
4, and in the drive shaft gripping position of this support tool 64, the lock portion 70 of the lock pin 69 is held in the fifth position by the spring force of the spring 72.
As shown in FIGS. 6 and 7, the rod 66 is configured to engage with an engaging groove 71 of the rod 66 to prevent the rod 66 from moving.

In addition, the support 64 and the rod 66 are connected to the rotating body 61.
At the same time, when the lock pin 69 is turned upward by a predetermined amount and is not supported, the lower end of the lock pin 69 comes into sliding contact with the cam surface 73 of the cam 60, as shown in FIG. The lock portion 70 is disengaged from the engagement groove 71, and is supported in the retracted position as shown in FIG. The tool 64, rod 66, and bracket 65 are configured to return to their original positions after being greatly retracted.

Furthermore, a U-shaped opening 74 for gripping the drive shaft 14 is formed at the tip of the support tool 64, as shown in FIG. Locking pins 76, 76 for supporting the drive shaft 14 which protrude and retract due to the force of a spring 75 are provided.

Furthermore, as shown in FIG.
Above, approximately parallel to the conveyance line of the pallet 13 and at the fixed position of the assembly station, the support 64 is moved from an upward rotational position (retracted position) shown by a phantom line in FIG. 1 to a downward direction shown by a solid line in the same figure. A guide bar 77 is provided for rotating the device to a rotating position (support standby position).

Note that the means for rotating the support tool 64 together with the rotating body 61 is not limited to the guide bar 77, and may be rotated by an automatic machine such as a robot.

The illustrated embodiment is configured as described above,
The action will be explained below.

First, the drive shaft 14 is vertically supplied to a predetermined position on the pallet 13 shown in FIG. 1 by the aforementioned robot arm 15.

Next, by operating the lift cylinder 17, the lift table 8 is raised via the slider 4.
Place the upper end positioning pins 22, 22 on the pallet 13.
The pallet 13 is positioned by inserting it into the positioning holes 23, 23, and the support 64 and rotating body 61 are guided by the guide bar 77 from the imaginary line position (retracted position) in FIG. 1 to the position shown in the figure. It is automatically rotated to the solid line position (support standby position).

Due to the lift operation of the slider 4 mentioned above, the pushing cylinder 26 for advancing the support tool is opposed to the bracket 65 at the rear end of the support tool 64 which has been rotated to a horizontal position.

Next, when the piston rod of the push-in cylinder 26 is projected, the support member 64 moves forward from the direction perpendicular to the drive shaft 14 as shown in FIG. I support it.

At this time, as shown in FIGS. 5 to 7, the lock portion 70 of the lock pin 69 is inserted into the engagement groove 7 of the rod 66.
1 to prevent movement of the rod 66, especially backward movement.

Drive shaft 14 by the above-mentioned support 64
After supporting, the robot arm 15 is moved back and away from the drive shaft 14.

Next, the incorrect insertion prevention device 46 shown in FIGS. 2 and 3
Only when the workpiece 42 on the pallet 13 and the drive shaft 14 are aligned with each other, the process moves to the next step.

In this next step, the press-fit head 27 is first lowered via the piston rod of the press-fit cylinder 6, and then the piston rods of the press-fit cylinder 6 and the sub-press-fit cylinder 28 are lowered synchronously to lower the press-fit rod 3.
2, and while holding the upper end of the drive shaft 14 with the press-fit cap 33 at the lower end of the press-fit rod 32, move the drive shaft 14 onto the pallet 1.
3 into the workpiece 42 above.

That is, as shown in FIGS. 2 and 3, the spline shaft 43 of the drive shaft 14 is press-fitted into the spline hole 44 of the front wheel hub 38.

After such a press-fitting process, when the supporter 64 and the rotating body 61 are forcibly rotated upward manually by an operator, the eighth As shown in the figure, the lock portion 70 of the lock pin 69 is disengaged from the engagement groove 71 of the rod 66, and the structure that integrates the support tool 64, rod 66, and bracket 65 is activated by the return force of the return spring 68 and the support tool. 64, Rod 6
6 etc. due to its own weight and moves downward along the through holes 63 and returns to the original position shown in FIG.

In summary, by arranging the drive shaft 14 vertically, the entire device can be prevented from becoming longer in the horizontal direction as in the conventional case, and the installation space for the device can be narrowed and the device can be made smaller and more compact. be.

In addition, the support tool 64 can be automatically rotated and set to the support standby position by the guide bar 77, and the support tool 64 can be set vertically to the drive shaft 14.
When the drive shaft 14 enters the opening 74 of the support 64, the locking pins 76, 76 easily retreat, and the drive shaft 14 enters the opening 74. This can be reliably supported by the locking pins 76, 76 and the opening 74.

In addition, when the drive shaft 14 is supplied or removed, the support 64 returns to its original position as shown by the phantom line in FIG. 1 and is in a largely retreated state.
Therefore, there is no hindrance to the supply and removal of the drive shaft 14, and therefore, there is an effect that the supply and removal of the drive shaft 14 can be performed smoothly.

In terms of the correspondence between the structure of this invention and the above-mentioned embodiment, the workpiece of this invention corresponds to the drive shaft 14 of the embodiment, and similarly, the supply means corresponds to the robot arm 15, and the pushing means corresponds to the pushing means. Although the rotation operation means corresponds to the cylinder 26 and the guide bar 77, the present invention is not limited to the configuration of the above-described embodiment.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, and FIG. 1 is a schematic diagram showing a work supporting device for an assembly pallet;
Fig. 2 is an explanatory diagram showing the operation to prevent incorrect insertion when the hub diameter is large; Fig. 3 is an explanatory diagram showing the operation to prevent incorrect insertion when the hub diameter is small; Fig. 4 is a plan view of the support mechanism; 6 is a side sectional view of the support mechanism; FIG. 7 is a rear sectional view of the support mechanism; FIG. FIG. 9 is an explanatory diagram showing a state in which the support mechanism has returned to its original position. 13... Pallet, 14... Drive shaft, 15... Robot arm, 16... Support mechanism, 26... Push cylinder, 59... Support member, 61... Rotating body, 64... Support tool, 77...
guide bar.

Claims (1)

[Scope of Claim for Utility Model Registration] A supply means for supplying a workpiece in a vertical position to a fixed position on a pallet, a support member erected on the pallet, and a rotating body rotatably attached to the support member. and is attached to the rotating body so as to be movable between a support position and a non-support position, and rotates with the rotating body between a support standby position and a retracted position, and is in a non-support position at the support standby position. a supporting tool that moves forward in a direction perpendicular to the workpiece to support the workpiece, and rotates together with the rotating body to a retracted position when the workpiece is not supported; and a rotation operating means that rotates the supporting tool to a support standby position. . A device for supporting a workpiece for an assembly pallet, comprising: pushing means for pushing the supporter in the non-supporting position at the support standby position to move it forward in a direction perpendicular to the workpiece.