JPH02180533A - Assembling method for extension coil spring - Google Patents

Abstract

PURPOSE:To correct in parallel a hook of an twisting state and to improve the stability and soundness in assembly by correcting each hook abutting to a hook cradle in parallel each other at its direction by pressing an extension coil spring and holding the coil part of this corrected extension coil spring by a chucking device. CONSTITUTION:When an extension coil spring 4 is fed from a chute 5 to a receiving part 11 with a cylinder device 8 being operated, chucking devices 26, 27 are actuated. A suction head 29 is descended and when the tip thereof presses the coil part of the extension coil spring 4, the hooks of the extension coil spring 4 in a twisting state are corrected so that the mutual hooks become in parallel. When the coil part of the extension coil spring 4 is sucked to the suction head 29 in this state, the extension coil spring 4 becomes to maintain the corrected shape even if being released from the press of the suction head 29.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for assembling a tension coil spring to a product or an assembly preparation device.

[Conventional technology]

A component within an assembly that is biased by a helical tension spring may move to some extent before the spring is installed because the component is not biased by the helical tension spring. For this reason, in the method of assembling parts into the assembly first and then assembling the spring, when assembling the spring, it is necessary to position the part of the part that engages with the spring before assembling the spring.

For this reason, there have been problems with an increase in installation time and a decrease in installation reliability.

In order to solve this problem, the present applicant proposed a method and apparatus for assembling a tension coil spring in Japanese Patent Application No. 63-26111.
3 is proposed. This method involves feeding a spring-biased component into a pre-assembly device external to the assembly, positioning it, and then attaching one end of the hook of the tension coil spring to the portion of the component that engages the hook. A tension coil spring is supplied so that one end engages with the hook retaining part of the jig of the assembly preparation device, and then the hook retaining part of the jig is moved by an external force to extend the tension coil spring, and the parts and the tension coil spring are This is a method of incorporating both into the product at the same time.

By the way, in the above-mentioned device, the hook-engaging portion of the component and the hook-retaining portion of the jig are installed vertically, so when supplying a tension coil spring to this device, the hook must be positioned horizontally. Must be. For this reason,
A tension coil spring positioning device disclosed in Japanese Unexamined Patent Publication No. 61-100328 positions the tension coil spring so that the hook is oriented horizontally.

[Problem to be solved by the invention] By the way, in the above-mentioned tension coil spring positioning device,
Tension coil springs manufactured with hooks oriented parallel to each other can be positioned, but tension coil springs manufactured with hooks oriented in a twisted position and not parallel to each other cannot be positioned. Ta.

For this reason, when a tension coil spring whose hooks are not parallel is supplied, there is a problem in that it cannot be stably and reliably assembled into a product or an assembly preparation device.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and it is an object of the present invention to propose a method for assembling a tension coil spring that can improve the stability and reliability of assembling by correcting the hooks in a twisted state so that they are parallel to each other. With the goal.

[Means to solve the problem]

In order to achieve the above object, the present invention places a tension coil spring supplied from a spring supply device on a hook holder and corrects its position, and then presses this tension coil spring to make each hook contact the hook holder. By correcting the orientations of the hooks so that they are parallel to each other, and holding the corrected coil portions of the tension coil springs with a chaffing device, the parallelism of the hooks is ensured, and then the hooks whose orientations are parallel to each other are fixed to the product or It is to be assembled into the hook holder of the assembly preparation device.

Further, the chucking device that holds the hooks while ensuring their mutual parallelism is preferably one that contacts and attracts the entire length of the coil portion of the tension coil spring.

[Effect]

According to the above method, the supplied tension coil spring is separated and placed horizontally on the hook holder.

When the tension coil spring is then pressed, the tension coil spring is deformed so that the hooks contacting the hook holder become parallel to each other. When this deformed coil portion of the tension coil spring is suctioned and held by a chucking device, each hook of the tension coil spring is kept parallel and horizontal to each other. After that, the tension coil spring held by the chaffing device is assembled into the product or the assembly preparation device, so that the hooks kept parallel and horizontal are assembled to the hook receivers provided on the product or the assembly preparation device.

Embodiments of the present invention will be described below with reference to the drawings.

〔Example〕

FIG. 1 shows an embodiment of a device for realizing the tension coil spring assembly method of the present invention. This device is installed on the floor of a production line in a factory, and a spring supply device is installed at the right end of the device. 3 is provided. A chute 5 for pushing out the tension coil spring 4 is provided on the side surface of the spring supply device 3.

A feeding groove 6 for feeding the tension coil spring 4 in the axial direction is formed on the upper surface of the chute 5. In order to position the tension coil spring 4 fed to the tip of the feeding groove 6, a suction hose 7 is attached to the lower surface of the tip of the chute 5. It is connected to the suction hole formed on the bottom.

A cylinder device 8 is arranged on the left side of the spring supply device 3. A column 10 fixed via a bolt is attached to the tip of the shaft 9 of this cylinder device 8, and a tension coil spring 4 supplied from a feeding groove 6 is placed separately on the upper part of this column IO. A receiving portion 11 is formed.

This receiving portion 11 is formed with a shallow groove having the same height as the bottom surface of the feeding groove 6 of the chute 5, and the total length of this shallow groove is equal to the length of the tension coil spring 4 placed thereon. For this reason, the cylinder device 8 operates, and the receiving portion 11
When the spring contacts the end surface of the chute 5 and receives the supply of the tension coil spring 4 from the feeding groove 6, one of the tension coil springs 4 to be pushed out is placed on the receiving portion 11. Note that a suction hole similar to the suction hole provided in the feeding groove 6 is provided at the bottom of the shallow groove, and this suction hole is connected to a hose 12 attached to the lower surface of the receiving part 11. .

A hook holder 13 for supporting hooks formed at both ends of the tension coil spring 4 is provided on the left side of the receiving part 11. The upper part of this hook holder 13 has a support surface 14.
The support surface 14 has an opening 15 into which the coil portion of the tension coil spring 4 is fitted. Further, a pair of guide bars 16 protrudes from the opening 15 as shown in FIG.
It is driven by a motor 19 via. This guide bar 16
is pressed so as to sandwich the coil portion fitted into the opening 15, and the tension coil spring 4 placed on the hook holder 13 is positioned at the center of the opening 15.

An assembly jig 18 for extending the tension coil spring 4 is provided on the left side of the hook holder 13.

A protrusion 20 and a pin 21 protrude from the upper surface of this assembly jig 18 for locking the hook of the tension coil spring 4. This pin 21 is connected to a slot 2 formed on the top surface of the assembly jig 18.
2 to the left to extend the tension coil spring 4 incorporated in the protrusion 20 and pin 21. This extended tension coil spring 4 is held in an extended state by a chucking device 23 shown by a broken line in the figure, and is incorporated into a product.

In this way, the spring supply device 3. Cylinder device 8° hook cradle 13. A slide shaft 25 extends over the floor where the assembly jig 18 is placed, and a pair of slidable chucking devices 26 and 27 are attached to the slide shaft 25 at a predetermined distance. ing. This chucking device 26, 27 has a suction device that can be raised and lowered.
Rads 28 and 29 are respectively attached.

As shown in FIG. 2, the tip of the suction head 28, 29 is formed with a groove having the same curvature as the tension coil spring 4 to be attracted, and this groove attracts and holds the coil part of the tension coil spring 4. . Each suction head 28, 29 has a suction hole 30, 31 formed therein.
．． One end of the suction head 28.31 is connected to a hose 32.33, and the other end is connected to a groove formed at the tip of the suction head 28.29. Note that one end of the hoses 7.12, 32.33 is connected to a suction pump (not shown).

A method for assembling the tension coil spring of the present invention using the apparatus configured as described above will be explained. When the cylinder device 8 operates, the receiving part 11 moves to the right and the chute 5
comes into contact with the end face of the When the receiving portion 11 comes into contact with the end surface of the chute 5, the cylinder device 8 stops and the spring supply device 3 operates instead. The tension coil spring 4 pushed out by the spring supply device 3 presses the tension coil spring 4 located at the tip of the chute 5 and moves it to the receiving part 11. When the tip of the tension coil spring 4 comes into contact with the left end of the receiving portion 11, the operation of the spring supply device 3 is stopped by a microswitch (not shown).

When the spring supply device 3 is stopped, a suction pump connected to the end of the hose 7.12 is activated, and the tension coil springs 4 located at the tip of the chute 5 and the receiving portion 11 are suctioned and fixed by each suction hole. After this, the cylinder device 8 is operated,
Since the receiving portion 11 is moved to the left, one tension coil spring 4 can be separated from the tension coil springs 4 continuous to the feeding groove 6.

When the receiving part 11 moves leftward and stops, the chucking device 26 located above is activated, and the suction head 28 descends to attract the tension coil spring 4 of the receiving part 11 with its tip. Thereafter, the suction head 28 rises while holding the tension coil spring 4 at its tip, and when the tip of the suction head 28 rises to a predetermined position, the chucking device 1F26.
27 moves to the left on the slide shaft 25. When the chucking device 26 is positioned on the hook holder 13, its movement is stopped and the suction head 28 is lowered. Note that the chucking device 27 is located above the assembly jig 18.

The suction head 28 stops descending when the hook of the tension coil spring 4 that it holds comes into contact with the support surface 14.

When suction is stopped at the same time, the tension coil spring 4
4 will be supported. Thereafter, when the suction head 28 rises to a predetermined position, the chucking device 26 moves above the receiving part 11.

When the tension coil spring 4 placed on the hook holder 13 is tilted with respect to the support surface 14, the tension coil spring 4 rotates in either direction, as shown in FIG. It becomes a state. Thereafter, the guide bar 16 driven by the motor 19 presses the coil portion of the tension coil spring 4, moves the tension coil spring 4 to the center of the opening 15, and corrects its placement position.

Thereafter, when the cylinder device 8 is activated and a new tension coil spring 4 is supplied to the receiving portion 11 from the chute 5, the chucking devices 26 and 27 are activated again. At this time, since the chucking device 26 repeats the above-described movement, the explanation will be omitted, and the movement of the chucking device 27 will be explained. When the suction head 29 descends and its tip presses the coil part of the tension coil spring 4, the hooks of the tension coil spring 4, which are in a twisted state as shown in FIG. 3, become parallel to each other as shown in FIG. It will be corrected to become. When the coil portion of the tension coil spring 4 is attracted to the suction head 29 in this state, the tension coil spring 4 maintains its corrected shape even when the pressure of the suction head 29 is released.

Thereafter, as the suction head 29 rises, the tension coil spring 4 separates from the hook holder 13, but the parallelism of the hooks to each other is ensured.

Thereafter, the chucking device 27 moves to the left and stops above the assembly jig 18. Then, the suction head 29 descends, and the tension coil spring 4 that is being suctioned is moved to the assembly jig 18.
Press it onto the top surface. At this time, both hooks of the tension coil spring 4 engage with the protrusion 20° pin 21. After this engagement, the operation of the suction pump is stopped and the suction head 29 is raised, and the four-tension coil spring 4 is attached to the assembly jig 18.

The tension coil spring 4 attached to the assembly jig 18 is pulled by the pin 21 moving to the left, and is extended to a predetermined length. The elongated tension coil spring 4 is then held by the chucking device 23 and incorporated into the product.

〔Effect of the invention〕

As explained above, according to the method for assembling the tension coil portion 4° of the present invention, before assembling the tension coil spring supplied from the spring supply device to the product or the assembly preparation device, the tension coil spring is attached to the hook receiver. After placing it on the stand and adjusting the position,
By pressing this tension coil spring, the directions of the hooks that contact the hook holder are corrected so that they are parallel to each other, and by holding the corrected coil portions of the tension coil springs with a chucking device, the mutual parallelism of the hooks is adjusted. Since the tension coil spring held by the chucking device is secured and then assembled into the product or the assembly preparation device, hooks whose orientations are parallel to each other can be assembled to the hook receivers of the product or the assembly preparation device. Therefore, the tension coil spring assembly method of the present invention allows the tension coil spring to be stably and reliably assembled to a product or an assembly preparation device. Furthermore, if the chucking device is one that contacts and attracts the entire length of the coil portion of the tension coil spring, it is possible to efficiently ensure the mutual parallelism of the corrected hooks of the tension coil spring.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of an apparatus for implementing the tension coil spring assembly method of the present invention. FIG. 2 is a diagram showing a state in which the hook is corrected by pressing the coil portion of the tension coil spring with a suction head. FIG. 3 is a sectional view showing a state in which a tension coil spring with a twisted hook is placed on a hook holder. 3... Spring supply device 4... Tension coil spring 5... Chute 8... Cylinder device 13... Hook holder 18... Assembly jig 14... Hook holder 23.26.27... Chucking device 28.29...
suction head. Procedural amendment

Claims (1)

[Claims] (1) In a tension coil spring assembly method in which a tension coil spring supplied from a spring supply device is assembled to a product or an assembly preparation device, the tension coil spring is placed on a hook holder and its position is corrected, and then this tension coil spring is By pressing, the directions of the hooks that contact the hook holder are corrected so that they are parallel to each other, and the corrected coil portions of the tension coil springs are held by a chucking device to ensure the parallelism of the hooks to each other. A method for assembling a tension coil spring, characterized in that hooks whose orientations are parallel to each other are later assembled to the hook receiver of the product or the assembly preparation device.