JPH0136854Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Technical field of the invention The invention relates to a reel used for winding wire with a winding machine, and more specifically, to a reel for winding wire by making the outer diameter of the core into which the wire is contracted. This invention relates to a structure that facilitates wire removal.

(b) Background of the technology As a method of electrical discharge machining, the wire cutting method, in which the workpiece is cut into a free shape by electric discharge between a thin metal wire and the workpiece, has been widely adopted and has been effective.

(c) Conventional technology and problems The metal wire used for electric discharge machining cutting by the wire cutting method is under tension of 1 kg or more during winding, and is made of copper, brass, tungsten, etc. due to the electric discharge. The metal wire is hardened and difficult to handle. The diameter of the metal wire is
It is a thin line of about 0.05 to 0.30 mm. Since these wires are not reused and are collected as waste material, they are removed from the reel without being rewound after being wound.

Actually, as shown in FIG. 1, the core 3 is placed over the hub 2 of the wire take-up reel 1, the wire 4 is wound onto it, the reel side plate 5 of the wire take-up reel 1 is disassembled, and the wire is wound around the core 3. removed wire 4
However, as mentioned above, the wire 4 is wound with high tension and the surface of the wire 4 is rough due to the discharge, so it cannot be easily removed from the core 3, so it is difficult to remove it with a tool such as a nipper. It took a lot of man-hours to cut the wound wire 4.

(d) Purpose of the invention This invention was created in view of the above points.
The purpose is to modify the structure so that the core 3 shown in the figure can be easily separated from the wound wire.

(e) Structure of the invention The purpose of the above invention is to connect two disc-shaped reel side plates and the reel portion in parallel and concentrically, to create a reel hub that can be assembled in a disassembly manner, and an inner cylinder that fits loosely on the outer surface of the reel hub. an inner cylinder having an inner conical surface and an outer conical surface, and an inner cylinder having an inner conical surface and an outer cylindrical surface that fit into the outer conical surface of the inner cylinder, and having a predetermined width provided in the axial direction over the entire length of the outer cylinder. In a configuration consisting of an elastically deformable outer cylinder having a slit, three pins are disposed on the same circumference on the narrow diameter part of the outer conical surface of the inner cylinder, and the 3
Accommodating the book pin and simultaneously moving the pin in the axial direction shrinks the outer shape of the outer cylindrical surface 3
This is easily achieved by forming a book guide groove and pushing out the inner cylinder fitted into the outer cylinder so that the outer shape of the outer cylindrical surface of the outer cylinder can be contracted.

(f) Embodiments of the invention Examples of the invention will be described below with reference to the drawings. FIG. 2 is an exploded sectional view showing the structure of an embodiment of the wire take-up reel according to the present invention. Both reel side plates 5 are formed integrally with a reel hub 7 having a female threaded portion 6 and a male threaded portion 8, respectively, and the wire take-up reel 1 can be assembled by screwing both threaded portions 6 and 8 together.
Conventionally, the wire 4 was wound by covering the reel hub 7 with the core 3, but in the present invention, as shown in the figure, an inner cylinder 9 and an outer cylinder 10 are combined and replaced with the core 3. ing.

The inner side B of the inner cylinder 9 is a cylindrical surface that fits loosely with the cylindrical surface A of the reel hub 7, and the outer C side is formed into a conical surface that becomes shorter in the direction of the arrow. Moreover, the inner side D of the outer cylinder 10 is formed into a conical surface having the same apex angle as the conical surface of the inner cylinder 9, and the outer side E is a cylindrical surface where the wire is directly wound. Further, a slit 11 is cut in the outer cylinder 10 along its entire length, and the outer circumference of the outer cylinder 10 can be contracted by the width thereof.

The inner cylinder 9 and the outer cylinder 10 have the same axial length, and the conical surfaces C and D just fit into each other when the two cylinders are completely overlapped. This state is called a winding state.

In the inner cylinder 9, three short pins 12 are arranged on a small diameter conical surface at a fixed distance apart from the end face in the direction of the arrow.
That is, they are installed on the same circumference of the C surface at equal division angles of 120 degrees, and the outer cylinder 10 has a guide groove 13 formed on the conical inner surface, that is, the D surface, from the end surface to a position corresponding to the pin 12. The three pins 12 are accommodated and moved in the axial direction. Among the guide grooves 13 described above, the central guide groove 13a is indicated by a dotted line.
is located at a position exactly opposite to the slit 11,
Although formed parallel to the axial direction of the outer cylinder 10, the other inclined guide groove 13b is indicated by a dashed line.
is provided on the conical D surface of the outer cylinder 10 with a slight inclination in the axial direction, and the inner circumferential distance between the central guide groove 13a and the inclined guide groove 13b on the end surface of the outer cylinder 10 is the same as that of the conical C surface of the inner cylinder 9. It is formed in the direction approaching the central guide groove 13a so as to be equal to the circumferential distance of the pin 12 implanted in the narrow diameter part, that is, in the direction in which the dimension becomes slightly larger from the side surface of the slit 11 as shown in FIG. .

In the above winding state, the pins 12 are accommodated in the three guide grooves 13 with the outer cylinder 10 in its natural (not deformed or contracted) state. Then, by pushing the outer cylinder 10 in the direction of the arrow to detach it from the inner cylinder 9 with your fingers or the like, or conversely by pushing the inner cylinder 9 in a direction to remove it from the outer cylinder 10, the inner cylinder 9 can be shaped into an arbitrary cross-sectional shape. The outer conical surface C of the outer cylinder 10 separates from the inner conical surface D of the outer cylinder 10, and the pin 12 implanted in the narrow diameter part of the outer conical surface C connects to the central guide groove 13a and the two pins that gradually approach the central guide groove 13a. Since each of the inclined guide grooves 13b slides and moves, the inclined guide grooves 13b
As a result of the inner two pins 12 strongly pressing the side wall of the inclined guide 13b toward the slit 11, the outer cylinder 10 made of synthetic resin reduces the width of the slit 11 and its outer diameter. Become.

By using the above mechanism, after winding the wire onto the outer cylindrical surface of the outer cylinder 13 using the wire take-up reel according to the present invention, the reel side plate 5 can be removed while the wire is being wound, and the wire can be unwound. It is clear that by pushing one end of the inner cylinder 9, which forms the core of the wire 4, in the axial direction, the outer diameter of the outer cylinder 10 can be reduced and the two cylinders can be easily separated. If the guide groove 13 is placed so that it does not reach the edge of the outer cylinder 10, both the inner and outer cylinders 9, 10 will be integrated, making handling more convenient. Further, an adhesive tape is used to secure one end of the wire to the outer cylinder 10 at the beginning of winding the wire, and if the slit 11 is covered with this tape at the same time, the wire can be wound more smoothly.

(g) Effects of the invention As is clear from the above explanation, if the wire take-up reel of the invention is used, the wound wire can be easily removed from the reel, which has the effect of improving work efficiency. be.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of the structure of a conventional wire take-up reel; FIG. 2 is a side view including a partial sectional view showing an exploded structure of an embodiment of the wire take-up reel according to the present invention; FIG. 3 is a front view showing the combination of inner and outer cylinders. In the figure, 1 is a wire take-up reel, 2,
7 is a reel hub, 3 is a core, 4 is a wire, 5 is a reel side plate, 9 is an inner cylinder, 10 is an outer cylinder, 11 is a slit, 12 is a pin, and 13 is a guide groove.

Claims (1)

[Scope of utility model registration request] Two disc-shaped reel side plates, a reel hub that connects the reel side plates in parallel and concentrically and can be assembled in a disassembly manner, and an inner sitter comprising an inner cylindrical surface and an outer conical surface that play with the outer surface of the reel hub. , an elastically deformable outer cylinder having an inner conical surface and an outer cylindrical surface that fit into the outer conical surface of the inner cylinder, and having a slit of a predetermined width in the axial direction over the entire length, Three pins are disposed on the outer conical surface of the inner cylinder on the same arbitrary circumference, and three guide grooves for accommodating and guiding the pins are provided on the inner conical surface of the outer cylinder. A structure in which the outer shape of the outer cylindrical surface of the outer cylinder can be contracted by pushing out the inner cylinder from the position where it is fitted into the outer cylinder. A wire take-up reel comprising: