JP2682228B2 - Bolt positioning device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bolt positioning device that automatically positions a bolt of an insulator that fixes a strut assembly that constitutes a suspension mechanism of a vehicle body to the vehicle body.

(Prior Art) Suspension attached to the body of an automobile,
There are various types, but the front wheels of recent passenger cars are
So-called MacPherson suspension is often used.

In this suspension, a spring and a strut corresponding to a shock absorber are integrally formed, and conventionally, when they are assembled to a vehicle body, these are assembled in advance as a strut assembly and then attached to the vehicle body.

Conventionally, such a strut assembly may be assembled by the assembling apparatus shown in FIG.

As shown in the drawing, the strut 1 is grasped by the hand 3 driven by the cylinder 2 and is fixed upright on the assembly table 4, and the spring receiver 5 fixed to the outer periphery of the strut 1 The spring 6 is attached.

Then, as shown in the drawing, the spring 6 is adapted to be compressed by a spring compression mechanism 7, whereby the tip of the rod 8 of the strut 1 is screwed to the insulator 9 while keeping the spring 6 compressed. By doing so, the strut assembly is assembled.

The insulator 9 is provided with three bolts 10 for fixing the strut assembly to the vehicle body, and the positions of these bolts 10 are arranged in accordance with the screw holes formed in the vehicle body. .

The strut assembly thus assembled is attached to the vehicle body by fixing the lower end of the strut 1 to the housing of the front wheel bearing and inserting the bolt 10 of the insulator 9 into the screw hole of the vehicle body and screwing the bolt.

At this time, the insulator 9 is only screwed to the tip of the rod 8 of the strut 1, and
Since it rotates around the center of the insulator 9, a so-called alignment mark is marked on the insulator 9, and by directing the alignment mark in a predetermined direction during the above-mentioned assembly, the workability when mounting on the vehicle body is improved. ing.

(Problems to be Solved by the Invention) However, since there is no conventional device for automatically determining the bolt position of the insulator, the bolt of the insulator is positioned by the alignment mark as described above. However, since such positioning is done manually by hand during assembly, the positioning accuracy is low and the bolts of the insulator do not align with the screw holes of the vehicle body. In some cases, it was installed.

For this reason, conventionally, it has been difficult to so-called automation of the work of assembling the strut assembly to the vehicle body, and it has been difficult to improve productivity because such work has to rely on manpower.

The present invention has been made in order to solve such a conventional problem, and the bolts of the insulator can be automatically positioned, and the strut assembly can be automatically assembled to the vehicle body. An object of the present invention is to provide a bolt positioning device that can be used.

(Means for Solving the Problem) In order to achieve the above object, the present invention is a bolt positioning device for positioning a bolt of an insulator for fixing a strut assembly that constitutes a suspension mechanism of a vehicle body to the vehicle body. Attaching a moving base that moves in the extension direction of the bolt provided on the insulator to the base provided with a fixing means for fixing the bolt of the insulator depending on the positional deviation of the bolt of the insulator that occurs when the strut assembly is assembled A first positioning plate and a second positioning plate, each having a larger diameter than the outer diameter and having through holes through which the bolt penetrates formed at the same position, are movable in mutually opposite directions in a direction perpendicular to the extending direction. A driving means attached to the movable base for driving the first positioning plate and the second positioning plate. And

(Operation) The bolt positioning device of the present invention configured as described above operates as follows.

First, the centers of the through holes of the respective positioning plates are previously aligned with the center positions of the screw holes of the vehicle body for screwing the insulator.

Then, the strut assembly assembled in the same manner as the conventional one is fixed by the fixing means provided on the base,
The moving base is moved so that the bolts of the insulator penetrate through the respective through holes of the first positioning plate and the second positioning plate.

Then, the driving means is actuated to move the respective positioning plates in the directions perpendicular to the extending direction of the bolts and in the opposite directions. As a result, the bolts are guided to the through holes of the respective positioning plates and positioned at the common center position before the movement of the respective through holes. In other words, since the respective through holes are formed at the same position, their center positions are the same, and the respective positioning plates move in mutually opposite directions, so that the bolt becomes The position shifts to the center position of the vehicle body, that is, the center position of the screw hole of the vehicle body.

(Example) Below, the bolt positioning device of this invention is demonstrated in detail based on drawing.

FIG. 1 is a schematic configuration diagram of a bolt positioning device of the present invention, and FIGS. 2 and 3 are detailed views of a positioning head of the bolt positioning device. The strut assembly for positioning the insulator bolts by this bolt positioning device is the same as the conventional one.
This description is omitted here.

As shown in FIG. 1, the bolt positioning device 20 of the present invention.
Positions the bolts 10 of the insulator 9 of the strut assembly 22 mounted on the so-called engine axle unit 21, and the engine axle unit 21 is mounted on the vehicle body in a later process (not shown). It has become.

As shown in the figure, the strut assembly 22 assembled in the same manner as in the past is fixed to the housing of the wheel bearing of the engine axle unit 21, and the engine axle unit 21 is mounted on the jig of the transport carriage 23. It is designed to be transported from the previous process.

The carrier vehicle 23 is positioned by the sensor 24 with respect to the bolt positioning device 20, and at the same time, the strut assembly 22 is also positioned with respect to the bolt positioning device 20.

The bolt positioning device 20 includes an engine axle unit mounted on a pedestal 25 fixed to a floor surface on which a carriage 23 travels.
A positioning head 26 is attached so as to be movable in the axle direction of 21 and the extending direction of the bolt 10 of the insulator 9.

A slide rail 27 is provided on the pedestal 25 in alignment with the axle direction of the engine axle unit 21, and a slider 29 driven by a cylinder 28 is slidably attached to the slide rail 27.

The slider 29 has a base 30 on which a positioning head 26 is movably attached in the extension direction of the bolt 10.
Is attached.

At the tip of this base 30, the bolt of the insulator 9
A slide shaft 31 extending in the same direction as that of 10 is fixed, and a slider 32 as the moving base is slidably attached to the slide shaft 31.

The slider 32 is driven by a driving member such as a cylinder (not shown) and moves in the extending direction of the bolt 10 of the insulator 9.

The positioning head 26 is attached to the slider 32 via a bracket 34.

Further, a hand 33 as the fixing means is attached to the base 30, and the hand 33 holds the strut 1 and holds it by the same manner as the hand 33 of the assembling apparatus exemplified in the prior art. It is designed to be fixed to the table 30.
This allows the strut assembly 22 to move the positioning head 26
It is designed to be securely fixed to.

Next, referring to FIGS. 2 and 3, the positioning head 26 will be described.
Will be described in detail.

As shown in FIG. 2, the main body casing 40 of the positioning head 26 is fixed to the bracket 34, and the main body casing 40 includes the first circular plate 41 and the first circular plate 41 as the first positioning plate and the second positioning plate. Two discs 42 are attached so that their respective rotation center axes coincide with each other and rotate independently.

The first disc 41 is attached to the lower end of a hollow shaft 44 that is rotatably attached to the main body casing 40 via a bearing 43, and the first disc 41 is centered on the hollow shaft 44 and is perpendicular to the extending direction of the bolt 10. It is designed to rotate.

On the other hand, the second disc 42 is rotatably mounted inside the hollow shaft 44 via a bearing 45, and is attached to the lower end of a solid shaft 46 penetrating the hollow shaft 44. The solid shaft 46 is adapted to rotate in a direction perpendicular to the extending direction of the bolt 10. That is, as shown in the figure,
The first disk 41 and the second disk 42 are adapted to rotate independently of each other in a direction perpendicular to the extending direction of the bolt 10 with their rotation center axes aligned.

A driven gear 47 is attached to the upper end of the hollow shaft 44. The driven gear 47 has a first disc drive motor (hereinafter referred to simply as the first motor) attached to the upper portion of the main body casing 40. The rotational force of the output shaft 49 of the transmission shaft 48 is transmitted via the gear 50 attached to the output shaft 49 and the gears 52 and 53 attached to the transmission shaft 51.

On the other hand, similarly to the hollow shaft 44, a driven gear 54 is attached to the upper end of the solid shaft 46, and the driven gear 54 has a second disc drive motor (not shown) attached to the upper portion of the main body casing 40. Hereinafter referred to simply as the second motor.) 55 output shaft 56
Is transmitted via the gear 57, the transmission shaft 58, and the gears 59 and 60. That is, the first disc 41 is the first
The second disc 42 is driven by the second motor 55 by the motor 48, and the respective discs 41, 42 rotate independently.

Then, as shown in FIG. 3 which is an AA arrow view of FIG. 2, bolts are attached to the first disc 41 and the second disc 42.
Through holes 61, 62 through which 10 passes are formed respectively.

These through holes 61 and 62 are provided to prevent the bolt 10 from being displaced when the strut assembly 22 is assembled.
It is formed in a long hole so that it can penetrate the hole 10, and the hole width is formed larger than the diameter of the bolt 10.

Then, these through holes 61, 62 are formed so as to overlap at the same positions of the respective discs 41, 42. This allows
If the respective through holes 61, 62 are aligned, the bolt 10 is penetrated through the respective through holes 61, 62, and the respective discs 41, 42 are rotated in the opposite directions, the bolt 10 is Discs 41,42
Before rotating, the through holes 61, 62 are moved to the center positions of the through holes 61, 62 in a state where the through holes 61, 62 are aligned with each other. That is, since the respective through holes 61 and 62 are formed at the same position, the center positions thereof are the same, and the respective discs 41 and 42 move in the opposite directions, so that the bolt 10 Is moved to the center position by moving by the amount displaced from the center position.

In this way, the bolt 10 is provided with the through holes 6 of the respective discs 41 and 42.
Since it is positioned at the center position of 1,62, the bolt 10 can be reliably inserted into the screw hole of the vehicle body in the next step.

The bolt positioning device of the present invention configured as described above operates as follows.

First, the centers of the through holes 61, 62 of the respective discs 41, 42 are
Align with the center position of the screw hole of the vehicle body for screwing the insulator 9.

Then, as shown in FIG. 1, the engine axle unit 21 having the strut assembly 22 assembled in the previous step in the same manner as in the prior art mounted on the housing of the wheel bearing is transported by the transport carriage 23, and the transport carriage 23 detects the sensor 24.
When the strut assembly 22 is positioned on the bolt positioning device 20 by being positioned by, the base 30 is first moved forward by the operation of the cylinder 28.

Next, the hand 33 is operated, and the strut 1 is gripped and fixed by the hand 33, whereby the strut assembly 22 is fixed to the base 30.

Further, by lowering the slider 32, the insulator 9 is inserted into the through holes 61, 62 of the discs 41, 42, respectively.
Insert bolt 10 of.

Then, by rotating the respective motors 48, 55 in opposite directions, the respective disks 41, 42 are rotated in the directions orthogonal to the extending direction of the bolt 10 and in the opposite directions. As a result, the bolt 10 is guided to the through holes 61, 62 of the respective discs 41, 42 while being positioned at the common center position before the movement of the respective through holes 61, 62, that is, the center position of the screw hole of the vehicle body. Positioned.

Therefore, since the bolt 10 of the insulator 9 is positioned at the common center position before the movement of the respective disks 41, 42 which is the center position of the screw hole of the vehicle body, the strut assembly 22 is attached to the vehicle body in the subsequent process. At this time, it is not necessary to align the position of the bolt 10 of the insulator 9 with the screw hole of the vehicle body, and the strut assembly 22 can be attached to the vehicle body only by inserting the bolt 10 of the insulator 9 into the screw hole of the vehicle body and screwing. Will be able to. As a result, such work can be easily automated, so that the assembly of the strut assembly 22 to the vehicle body can be automated and the productivity can be improved.

(Effects of the Invention) As is apparent from the above description, the present invention has the following effects.

Since it is possible to position the insulator bolts at the common center position before the movement of the positioning plates, which is the center position of the screw holes of the vehicle body, after that, when installing the strut assembly on the vehicle body, the position of the insulator bolts Is no longer required to be fitted to the vehicle body screw hole, and the strut assembly can be attached to the vehicle body simply by inserting the insulator bolt into the vehicle body screw hole and screwing. As a result, since such work can be easily automated, the assembly of the strut assembly to the vehicle body can be automated and the productivity can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a bolt positioning device of the present invention, FIGS. 2 to 3 are detailed diagrams of a positioning head of the bolt positioning device, and FIG. 4 is an explanatory diagram of an assembly work of a conventional strut assembly. is there. 1 ... Strut, 9 ... Insulator, 10 ... Bolt, 20 ... Bolt positioning device, 22 ... Strut assembly, 25 ... Mounting base, 26 ... Positioning head, 30 ... Base, 32 ... Slider ( Moving base), 33 ... Hand (fixing means), 41 ... First disc (first positioning plate), 42 ...
Second disc (second positioning plate), 48 ... First disc drive motor (driving means), 55 ... Second disc drive motor (driving means), 61, 62 ... Through holes.

Claims (1)

(57) [Claims] 1. A bolt positioning device for positioning a bolt of an insulator for fixing a strut assembly constituting a suspension mechanism of a vehicle body to a vehicle body, wherein the insulator is attached to a base provided with a fixing means for fixing the strut assembly. Attach a moving base that moves in the extension direction of the provided bolt, and it is formed with a diameter larger than the outer diameter of the bolt according to the positional deviation of the bolt of the insulator that occurs when assembling the strut assembly, and penetrates the bolt A first positioning plate and a second positioning plate having through holes formed at the same position are attached to the movable base so as to be movable in mutually opposite directions at right angles to the extending direction, the first positioning plate and the second positioning plate A bolt positioning device comprising drive means for driving a positioning plate.