JPS5918396Y2 - Jig using magnets - Google Patents

Description

[Detailed description of the invention] The present invention relates to an assembly jig for assembling parts that are partially made of magnets or highly permeable materials, and in particular to an assembly jig for assembling parts that are partially made of magnets or highly permeable materials. The present invention relates to the configuration of an assembly jig that is extremely effective when it is necessary to position the assembly jig in a predetermined direction.

The present invention will be described in detail below based on examples.

FIG. 1 is a perspective view for explaining the assembly jig of the present invention and the shape of the parts to be assembled, and FIG. 2 is a longitudinal sectional view of the same embodiment.

The assembly jig 1 is fixed on an index table of an automatic assembly machine (not shown) or on a pallet to be transported, and is sequentially transported to a predetermined work position for assembly work.

The assembly jig 1 is provided with a positioning portion 1a and positioning pins 3 for positioning the base plate 4, which is the main part of the assembly, and the base plate 4 is positioned and placed.

The assembly jig 1 is provided with a magnet 2, which is used for positioning the parts and preventing them from falling over, as will be described later.

In this embodiment, the parts to be assembled are a balance wheel 6 of a balance wheel 7, a balance wheel 8 is attached to the lower part of the balance spring 7, a magnet 9 is provided in a part of the balance wheel 8, and a hairspring 10 is fixed to the upper part. has been done.

Above the assembly jig 1, there is a component supply device (not shown) that is movable vertically and horizontally.A vacuum chuck 11 is provided at the tip of the component supply device, which supplies the balance wheel 6 and its lower tenon to the main plate 4.
Insert it into the bearing 5 and assemble it.

In automatic assembly, only assembling the balance wheel 6 to the main plate 4 is one process, and the balance is then transported to the next process.

However, as mentioned above, the lower tenon of the balance wheel 6 is the bearing 5.
Since the balance is only inserted into the body, a normal assembly jig is likely to fall over during transportation, and the position of the magnet 7 of the balance wheel 6 often shifts as the balance wheel 6 rotates during transportation.

However, by configuring the assembly jig as described above, the magnet 2 of the assembly jig 1 and the magnet 9 of the balance wheel 6 attract each other and the balance wheel 6 is positioned. By providing two 4a on both sides of the magnet position, the balance 6 is supported, and there is no fear that it will fall down even if it is only slightly tilted in a predetermined direction, making it possible to carry it stably.

In this embodiment, the pin for preventing falling is provided on the base plate, but it may be provided on the assembly jig 1 if necessary, and this pin may also serve as the positioning pin 3.

The embodiment of the present invention is constructed as described above, but in order to concentrate the magnetic flux between the magnets and improve positioning accuracy, the assembly jig 1 is made of a non-magnetically permeable material, and the magnet 2 is made of a non-magnetic material. It is obvious that it is very easy to consider methods such as having the magnet 2 protrude from the tool 1 and approaching the magnet 9, or making the tip of the magnet 2 conical.

I have described the assembly of the balance wheel as an example above, but
It is possible to assemble step motors for watches, movable iron core type measuring instruments, etc. without changing the gist of the present invention at all, and it can also be applied to the assembly of gear trains using iron gears. You can also do that.

As mentioned above, the present invention uses magnets in the assembly jig to reliably position unstable assembled parts and prevent the parts from falling during transportation, thereby ensuring reliable operation of the automatic assembly machine. This has the great effect of improving operating efficiency and shortening cycle time.

[Brief explanation of drawings]

FIG. 1 is a perspective view illustrating the present invention, and FIG. 2 is a longitudinal sectional view.

Claims (1)

[Scope of utility model registration request] In an assembly jig for assembling and transporting parts in which a part of the part is made of a magnet or a highly magnetically permeable material, the assembly jig is located below the magnet or highly permeable material of the part and away from the center of the part. A magnet is embedded in the tool, and support parts for the part are provided in at least two positions sandwiching the magnet of the main part or assembly jig, so that the magnet holds the part in a predetermined position and prevents the part from falling. A jig using a magnet, which is characterized by being configured to do so.