JPH056028Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a spring assembly device for a vehicle used for assembling a spring to a shock absorber body.

(Prior art) Generally, a shock absorber is used as a suspension device for automobiles, but the springs installed in this shock absorber vary depending on the weight and height of the automobile, and there are an extremely wide variety of springs. There is something like that.

When assembling these various types of springs to the shock absorber body, the conventional method has been to select the springs to be assembled based on identification colors displayed on these springs.

(Problem to be solved by the invention) When selecting an appropriate spring based on the identification color displayed on the spring as in the above-mentioned prior art, if the degree of freedom of these springs differs by only a few mm, Since the shape is very difficult to distinguish, if springs were selected based only on the identification color, there was a risk that an inappropriate spring would be incorrectly installed.

This invention was made in view of the above points,
Focusing on the fact that the spring constants of these springs are different with an appropriate difference, the compressive load applied to the spring is detected, and the compressive load is compared with the upper and lower limit setting values that indicate the correct compressive load set in advance. The purpose of this is to enable selection of an appropriate spring in comparison with the above.

(Means for Solving the Problems) In the present invention, as a means for solving the above problems, there is provided a holding jig that supports the shock absorber body in an upright state, and a holding jig that faces above the holding jig so as to be movable up and down. A spring assembling device for a vehicle comprising a compression jig for holding a spring that is arranged and to be assembled to the shock absorber main body, and a driving means for moving the compression jig up and down, the compression jig including:
A load detector is provided to detect the reaction force of the spring caused by the pressure applied by the compression jig, and it should be assembled with compression state setting means for setting the correct compression state for each different type of spring to be assembled. Load setting means for setting upper and lower limit set values as correct reaction forces when compressing different types of springs; comparison means for comparing the detected value by the load detector with the upper and lower limit set values; and a signal from the comparison means. A controller is provided with a display means for displaying that the detected value deviates from the upper and lower limit set values.

(Function) In the present invention, the following effects can be obtained by the above means.

That is, when assembling a spring to the shock absorber main body that is supported upright on a receiving jig, the compression jig that holds the spring is placed in the correct compression state preset by the compression state setting means. In order to reproduce this, the spring is moved downward by the driving means, and at that time, the load applied to the spring by the compression jig is detected as a reaction force of the spring by the load detection value, and this detected load and the appropriate spring compression load are used as the load setting means. The spring is compared with preset upper and lower limit values, and if the detected load deviates from the upper and lower limit values, an alarm is displayed indicating that the spring is inappropriate.
Therefore, the spring is always properly assembled, and incorrect spring assembly can be reliably prevented.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The vehicle spring assembly device of this embodiment is used for assembling a spring 5 to a shock absorber body 3, and includes a substantially L-shaped base 1 and a horizontal portion of the base 1. 1a and configured to support the shock absorber main body 3 in an upright state; and a receiving jig 2 which is arranged oppositely above the receiving jig 2 so as to be vertically movable and is provided at the upper end of the spring 5. It includes a compression jig 4 for holding an upper spring receiver 8, and a driving means 9 for moving the compression jig 4 up and down. In addition, in the vehicle spring assembly device of this embodiment, a receiving jig and a compression jig are respectively installed in order to assemble the springs at once to a pair of shock absorber bodies that constitute a suspension device provided on both left and right sides of an automobile. Although there are one pair each, in the following explanation, only one side will be described.

The receiving jig 2 is fixed to the horizontal portion 1a of the base 1 via a fixing member 20, and has a receiving portion 2a on its upper surface that supports the lower spring receiver 7 of the shock absorber body 3. It is formed.

The compression jig 4 is attached to a support 12 that is movable up and down with respect to the vertical part 1b of the base 1 via a guide 13, and has a pair of clamp parts 4a, 4a that can be opened and closed. It is composed of.

The clamp parts 4a, 4a are connected to the support base 12.
A guide provided on the rotating shafts 22, 22 is provided at the lower part of the rotating shafts 22, 22, which are rotatably fitted into the bearing tubes 21, 21 fixed to the bearing cylinders 21, 21. It is vertically movable via rails 23, 23.

Gears 24, 24, which have an arcuate shape and mesh with each other, are provided on the upper portions of the rotation shafts 22, 22.

One end of a link 25 is connected to the upper ends of the rotation shafts 22, 22, and the other end of the link 25 is connected to a piston rod 27 of an opening/closing cylinder 26 fixed to the support base 12. That is, the gears 24, 24 are connected to the opening/closing cylinder 26.
The arc rotation of these gears 24, 24 causes the clamp parts 4a, 4a to open and close between the state shown by the solid line and the state shown by the chain line in FIG. It is designed to be activated and placed in an unclamped or clamped state. Reference numeral 28 is a connecting bar for opening and closing the left and right compression jigs 4, 4 in synchronization.

The lower ends of the bearing tubes 21 and 21 are connected by a connecting member 29, and a load detector is provided on the lower surface of the connecting member 29 to detect the reaction force of the spring 5 received by the compression jig 4. A working load cell 15 is provided. This load cell 15
When the clamp parts 4a, 4a of the compression jig 4 are in the closed state (in other words, when the upper spring receiver 8 of the spring 5 is in the clamped state), the compression is performed by the reaction force of the spring 5. The upper surface of the jig 4 is brought into contact with the jig 4.

The driving means 9 includes a servo motor 14 fixed to the upper surface of the base 1, a screw shaft 10 rotated by the servo motor 14, and the screw shaft 10.
It consists of a ball screw 11 screwed into the
By connecting the ball screw 11 to the support stand 12, the support stand 12 (in other words, the compression jig 4) can be moved up and down by forward and reverse driving of the servo motor 14. .
Reference numeral 13 denotes a guide rail provided on the base vertical portion 1b to guide the support base 12 in the vertical direction.

Further, on the base 1, a lifting tool 31 is vertically movable for holding and lifting a rod lifting tool 30 screwed onto the upper end of the rod 6 of the shock absorber main body 3 supported by the receiving jig 2. It is provided. The elevating tool 31 has a chucking head 3 that holds the upper end of the rod lifting tool 30 at its tip.
1a, and can be raised and lowered by a lifting cylinder 32 for lifting the rod. In the drawings, reference numeral 33 is a warning lamp, 34 is a nut, and 35 is a washer.

Therefore, the vehicle spring assembly device of this embodiment receives information from the load cell 15, and
A controller 19 is attached to determine whether the spring 5 to be assembled is appropriate.

The controller 19 is constituted by a microcomputer, and as shown in the diagram corresponding to the claims shown in FIG. Vessel 17 and
Upper and lower limit set values P ₀ ±α as the correct reaction force during compression for each different type of spring to be assembled
A load setting device 16 acts as a load setting means for setting the load P detected by the load cell 15.
and a display means for displaying that the detected load P deviates from the upper and lower limit set values P _{0 ±} α based on a signal from the comparing means. We are prepared. The stroke setter 17 is used to preset a desired compression stroke of the spring 5, which varies depending on the vehicle type, and adjusts the rotation amount of the servo motor 14 (in other words, according to the stroke set by the stroke setter 17). , the amount of descent of the compression jig 4) is determined.

In other words, this controller 19 controls the load cell 15 when the spring 5 to be assembled to the shock absorber body 3 (compression load and compression stroke at the time of assembly differ depending on the vehicle model) is compressed by a set stroke. The detected load P thus detected is compared with the expected load when the spring 5 to be assembled is compressed (in other words, the upper and lower limit setting values P ₀ ±α set by the load setting device 16), If the detected load P deviates from the upper and lower limit set values P ₀ ±α, the spring 5 is deemed to be inappropriate and an abnormality alarm is displayed.

Next, the operation of the illustrated vehicle spring assembly device will be explained.

First, after selecting which car model the shock absorber to be assembled will be used, the shock absorber main body 3 is supported in an upright state on the holding jig 2, and the lower spring receiver 7 of the shock absorber main body 3 is supported in an upright state. The spring 5 to be assembled is set, the upper spring receiver 8 is placed on the upper end of the spring 5, and the rod lifting tool 30 is placed on the upper end of the rod 6 of the shock absorber body 3.
Screw them together to complete the work set.

Thereafter, the spring 5 is compressed and assembled using the compression jig 4, and in the process, the suitability of the set spring 5 is determined.

The suitability of the spring 5 is determined according to the flowchart shown in FIG.

That is, after the workset is completed (step
_S1 ), the compression jig 4 is driven by the servo motor 14.
is lowered to a position corresponding to the upper spring receiver 8, and the clamp portions 4a, 4a of the compression jig 4 are operated to close by the action of the opening/closing cylinder 26 to clamp and hold the upper spring receiver 8. Furthermore, the servo motor 14 Compression of the spring 5 by the compression jig 4 is started by the drive of the compression jig 4 (step
_S2 ). At the start of this compression, when the reaction force of the spring 5 begins to act on the compression jig 4, the load cell 15 detects this and resets the stroke of the servo motor 14 to zero (step _S3 ). After that, the servo motor 14 is driven to move the compression jig 4 to the set stroke (spring 5 to be assembled).
) (step S ₄ ),
The detected load P obtained as input information from the load cell 15 (step S ₅ ) is compared with the upper and lower limit setting values P ₀ ±α preset by the load setter 16 (step S ₆ ), and the If the detected load P deviates from the upper and lower limit set values P ₀ ±α, it is determined that the set spring 5 is inappropriate, and an abnormality alarm is displayed by the alarm lamp 33 (step S ₇ ). . After replacing the spring 5 (step S ₈ ), compression using the compression jig 4 is started again. The spring 5 can be replaced after the compression jig 4 is raised by driving the servo motor 14.
This is done by opening and unclamping the clamp parts 4a, 4a of the compression jig 4 by operating the opening/closing cylinder 26, and replacing the spring 5 with a new one.

When it is determined in step _S6 that the detected load P is within the upper and lower limit set values _P0 ±α, the spring 5 is assembled as described later (step _S9 ).

That is, after lowering the lifting tool 31 by operating the lifting cylinder 32 and connecting the chucking head 31a at the lower end of the lifting tool 31 with the head lifting tool 30, the lifting tool 31 is raised by operating the lifting cylinder 32. Then, pull up the rod lifting tool 30 and pull up the upper end of the rod 6 of the shock absorber main body 3 to a position where it projects above the upper spring receiver 8. Thereafter, the connection between the chucking head 31a of the elevating tool 31 and the head lifting tool 30 is released, and the rod lifting tool 31 is further removed from the rod 6, resulting in the state shown in FIG.
Spring assembly is completed by tightening the nut 34 and washer 35 to the upper end of the rod 6. When the assembly of the spring 5 is completed, the compression jig 4 is raised by the drive of the servo motor 14, and then the opening/closing cylinder 26
The clamp parts 4a, 4a of the compression jig 4 are
is said to be in an unclamped state in which it is activated to open,
This will prepare you for the next spring assembly.

As described above, according to this embodiment, when assembling the spring 5 to the shock absorber body 3, the load cell 15 attached to the compression jig 4 compresses the spring 5 to be assembled. The compressive load P applied to the spring 5 is detected, and the detected compressive load P and the upper and lower limit set values P ₀ ±α
The detected compression load P is compared with the upper and lower limit set values P ₀
If it deviates from ±α, the set spring 5 is determined to be inappropriate and an abnormality alarm is displayed. This makes it possible to prevent assembly.

Note that in the case of the above embodiment, a microcomputer is used as the controller 19;
It is needless to say that the present invention is not limited to this, and may be constructed from an electric device such as a comparator.

Further, in the above embodiment, the upper spring receiver 8 is pressed by the compression jig 4, but the intermediate portion of the spring 5 may be locked and pressed.

Furthermore, the present invention is not limited to the illustrated embodiment, and it goes without saying that the design can be modified as appropriate without departing from the gist of the invention.

(Effects of the invention) As described above, according to the invention, there is a receiving jig that supports the shock absorber main body in an upright state, and a receiving jig that is disposed facing above the supporting jig so as to be movable up and down, and is assembled to the shock absorber main body. In a vehicle spring assembly device comprising a compression jig for holding a spring to be attached and a drive means for moving the compression jig up and down, A load detector is provided to detect the reaction force of the spring, and a compression jig for holding the spring is provided when the spring is assembled to the shock absorber body which is supported upright by the receiving jig. In order to reproduce the correct compression state preset by the compression state setting means, the spring is compressed by moving it downward by the driving means, and at that time, the compression load detected by the load detector and the appropriate spring compression load are set in advance. By comparing the set upper and lower limit values, if the detected load deviates from the upper and lower limit values, a warning will be displayed indicating that the spring is incorrect. Even in so-called mixed flow assembly, in which spring assembly is performed, there is a practical effect in that erroneous assembly of springs can be reliably prevented.

[Brief explanation of drawings]

FIG. 1 is a side view with a part of the vehicular spring assembly device according to the embodiment of the present invention in cross section, and FIG.
3 is a partially cutaway front view of the vehicular spring assembling device of FIG. 1, and FIG. , an enlarged cross-sectional view of the main parts of the vehicle spring assembly device shown in FIG.
The figure is an enlarged plan view of the compression jig portion of the vehicle spring assembly device shown in Figure 1, Figure 6 is a view corresponding to Figure 4 showing the state in which the rod of the shock absorber body is pulled up, and Figure 7 is a view corresponding to Figure 4. , is a flowchart illustrating the operation of the controller in the vehicle spring assembling device according to the embodiment of the present invention. 2... Receiving jig, 3... Shock absorber body, 4... Compression jig, 5... Spring, 9...
Drive means, 15...load detector (load cell),
19... Controller.

Claims (1)

[Scope of utility model registration request] A holding jig that supports the shock absorber body in an upright state; a compression jig that is disposed above the holding jig so as to be vertically movable and that holds a spring to be assembled to the shock absorber body; The spring assembling device for a vehicle is equipped with a driving means for moving the spring up and down, and the compression jig is provided with a load detector for detecting a reaction force of the spring generated by the pressing force of the compression jig. compression state setting means for setting the correct compression state for each different type of spring to be assembled, and load setting means for setting upper and lower limit set values as correct reaction force during compression for each different type of spring to be assembled. Comparing means for comparing the detected value by the load detector with the upper and lower limit set values, and display means for displaying that the detected value deviates from the upper and lower limit set values based on a signal from the comparing means. A spring assembly device for a vehicle, characterized in that a controller is attached.