JP2643992B2 - Supply method of coil spring - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of supplying a coil spring that automatically supplies a coil spring when performing automatic assembly.

[Prior Art] Conventionally, a method of packing a coil spring in a state where one wire is passed through a number of coil springs has been considered (see Japanese Utility Model Laid-Open No. 49-13232). As an apparatus for automating the process of separating the coil springs one by one from the packaged state, a supply apparatus disclosed in Japanese Patent Application Laid-Open No. 51-13487 is known.

As shown in FIG. 3, the supply device includes a coil spring 1
Separating device that drops one by one with wire 2 passed through
21 ', a supply unit 28 which is provided movably up and down and which receives the coil spring 1 dropped from the separation device 21' and supplies it to an appropriate position in the vertical direction; And a cutting device 29 for cutting the cutting device 2.

[Problem to be Solved by the Invention] According to the above-described conventional configuration, the coil spring 1 is extracted from the wire 2 by the supply unit 28, and the wire 2 is cut after dropping the extracted wire 2. Therefore, the process of removing the coil spring 1 and the process of cutting the wire 2 are different processes, and there is a problem that the working efficiency is poor. Further, in the above-described conventional configuration, only the process of separating the coil springs 1 one by one from the above-described packing state is disclosed, and the coil springs 1 are put into a conventionally known parts feeder or the like. Since the assembling work must be performed, there is a problem that the work cannot be made consistent from the separating work of the coil spring 1 to the assembling work.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and simultaneously performs a coil spring extracting process and a wire cutting process, and associates a coil spring separating operation and an assembling operation. An object of the present invention is to provide a method of supplying a coil spring that enables efficient automatic assembly.

[Means for Solving the Problems] In the present invention, in order to achieve the above object, a first step of pulling a lower end of a suspended wire and dropping a coil spring one by one to a predetermined position of the wire, The second step of cutting the wire at a position above the coil spring while holding the coil spring that has fallen to the predetermined position, and the third step of taking out the held coil spring to the outside are provided.

[Operation] According to the above configuration, since the step of cutting the wire at a position above the coil spring while holding the coil spring is provided, the coil spring is detached from the wire by cutting the wire, and the coil spring is taken out. Since the process and the cutting process of the wire are performed simultaneously, the work efficiency is improved. Further, since the coil spring is held during the wire cutting process and then the coil spring is taken out to the outside, the separated coil spring can be held as it is to perform the assembling operation. The process from separation to assembly is a consistent task.

[Embodiment] As shown in FIG. 1, a wire 2 is wound around a drum 1 in such a manner that one wire 2 passes through many coil springs 1. The wire 2 paid out from the drum 11 is suspended via a roller 12 for adjusting the tension and a roller 13 for changing the direction. Below the roller 13, there is provided a separating device 21 for dropping the coil springs 1 one by one while passing through the wire 2. This separating device 21 is composed of two upper and lower spring clamps 22,2.
3 and a wire clamp 25 disposed below the lower spring clamp 23. Each of the spring clamps 22 and 23 and the wire clamp 24 is a pair of clamp pieces 22.
a, 23a, 24a, and the clamp pieces 22a, 24a of the upper spring clamp 22 and the wire clamp 24 only move straight in the direction in which they are opened and closed, respectively. They slide in directions parallel to each other to apply a rotational force around the wire 2 to the coil spring 1. Below the separating device 21, a cutter 25 for cutting the wire 2 is provided. Further below, a manipulator 26 that holds the coil spring 1 and takes it out is provided. Manipulator 26
Below this, a wire pulling device 27 that can move up and down and can grasp the lower end of the wire 2 is provided. Separation device
The cutter 21, the cutter 25, and the pulling device 27 are configured to interlock using a mechanism such as a cam, and operate as follows.

That is, as shown in FIG.
27 has moved to an upper position near the wire clamp 24 and is gripping the lower end of the wire 2. In this state, the coil spring 1 is held by the upper and lower spring clamps 22 and 23, respectively, and the wire clamp 24 holds the wire 2. Next, as shown in FIG. 2 (b), the lower spring clamp
23 and the wire clamp 24 are opened, and only one coil spring 1 falls and comes into contact with the tension device 27. At this time, the lower spring clamp 23 applies a rotational force to the coil spring 1 so that the coil spring 1 can easily fall. afterwards,
As shown in FIG. 2 (c), the pulling device 27 moves downward to pull the wire 2 downward, and as shown in FIG. 2 (d), the wire clamp 24 is closed and the wire 2 is held. At the same time, the manipulator 26 closes and the coil spring 1 is held. In this state, the wire clamp 24 and the tension device 27
The tension is applied to the wire 2 between. Then, as shown in FIG. 2 (e), the wire 2 is cut above the coil spring 1 by the cutter 25, and the coil spring 1 is separated from the wire 2 at the same time. At this time, the upper spring clamp 22
Is opened, and the coil spring 1 is overlaid on the wire clamp 24. Thus, the coil spring 1 separated from the wire 2
2 is taken out by the movement of the manipulator 26, as shown in FIG. At this time, both spring clamps 22 and 23 are closed at the same time, and each coil spring 1 above the wire clamp 24 is held. Thus, when the tension device 27 moves upward, it returns to the state shown in FIG. 2A again. By repeating this cycle, the coil springs 1 are separately supplied one by one, and it can be seen that the number of working steps is clearly smaller and efficient work can be performed as compared with the conventional configuration. Also, as is apparent from the above description, when the wire 2 is cut, the coil spring 1 is located between the cut portion and the tension device 27, so that the length of the wire 2 It must be longer than the sum of the lengths of the springs 1, and the length of the wire 2 has a margin in advance.

In the above configuration, the pair of clamp pieces 22a and 23a are provided on the spring clamps 22 and 23, but may be of an iris type.

[Effects of the Invention] As described above, the present invention includes the first step of pulling the lower end of the suspended wire and dropping the coil springs one by one to a predetermined position on the wire, and A second step of cutting the wire at a position above the coil spring while holding the coil spring, and a third step of extracting the held coil spring to the outside are provided. Since the process of cutting the wire at the upper position is provided, the coil spring is detached from the wire by cutting the wire, and the removal process of the coil spring and the cutting process of the wire will be performed simultaneously,
There is an advantage that work efficiency is improved. Further, since the coil spring is held during the wire cutting process and then the coil spring is taken out to the outside, the separated coil spring can be held as it is to perform the assembling operation. The process from separation to assembly is a consistent task.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a coil spring supply device using the present invention, FIG. 2 is an operation explanatory diagram of the same, and FIG. 3 is an operation explanatory diagram of a conventional example. 1 ... Coil spring, 2 ... Wire, 21 ... Separation device, 2
2,23 …… Spring clamp, 24 …… Wire clamp, 25 ……
Cutter, 26 ... Manipulator, 27 ... Tensioning device.

Claims (1)

(57) [Claims] 1. A method of supplying a coil spring in which a coil spring is separated and supplied one by one from a single wire passed through a number of coil springs, wherein the lower end of the suspended wire is pulled and one coil spring is provided. A first step of dropping the wire to a predetermined position of the wire, a second step of cutting the wire above the coil spring while holding the coil spring dropped to the predetermined position, and taking out the held coil spring to the outside A method for supplying a coil spring, comprising the third step.