JP4651123B2 - Recycling device for shaft with elastic body - Google Patents

Description

  The present invention relates to a recycling apparatus for a shaft with an elastic body in a roller whose surface is formed of an elastic body such as a paper feed roller of a printer.

  Generally, in a roller or the like in which an elastic body such as sponge or rubber is fitted and fixed to the outer peripheral surface of a metal shaft, when the elastic body is fixed to the shaft with an adhesive, a predetermined fixing strength and a stable fixing strength are obtained. For this purpose, the adhesive is thermally cured by placing it in a high-temperature furnace with the elastic body inserted into the shaft via an adhesive and heating it at a predetermined temperature for a predetermined time. And when recycling such a shaft with an elastic body after use, it is necessary to extract the elastic body from a metal shaft. Conventionally, as the extraction method, for example, the methods shown in Patent Document 1 and Patent Document 2 are used. Are known.

Among these, the extraction method disclosed in Patent Document 1 includes a reverse member made of a thin material having a flexible cross-sectional arc shape between the outer peripheral surface of the shaft and the elastic body, and protrudes from the elastic body of the reverse member. An operation knob peeled off from the shaft is provided at the distal end, and by pulling the knob toward the proximal end and reversing, the reverse member is removed from the shaft so that the elastic body is removed from the shaft (peeled). It is a thing. Further, in the extraction method disclosed in Patent Document 2, a linear member is linearly extended between the outer periphery of the shaft and the elastic body, the base end is attached to one end side of the shaft, and the tip is directed to the other end side. By stretching the wire rod and pulling the wire to the elastic body side, the elastic body is cut and the elastic body is extracted (peeled) from the shaft.
Japanese Patent Laid-Open No. 9-2692 JP-A-9-77297

  However, in any of such extraction methods, it is necessary to interpose a reverse member or a wire in advance between the outer peripheral surface of the shaft and the elastic body, and the number of members of the shaft with the elastic body increases, so that the member cost increases. This is disadvantageous in terms of cost, for example, because an operation for interposing is required and the manufacturing cost is increased. Also, since the reverse member and the wire are located on the outer peripheral surface of the shaft, which is the fixing surface of the elastic body and the shaft, the fixing strength tends to decrease at these member portions, and sufficient and stable fixing between the elastic body and the shaft It is difficult to maintain the strength for a long time.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a cost-effective elastic body that can easily burn out a used elastic body firmly fixed to the shaft from the shaft. It is to provide a shaft recycling device.

In order to achieve this object, the invention according to claim 1 of the present invention is such that the outer peripheral surface of the shaft into which the shaft hole of the elastic body is inserted is formed of a magnetic material, or in the shaft hole of the elastic body. An apparatus for recycling a shaft with an elastic body, wherein a magnetic body is disposed on a peripheral surface, and the elastic body is fixed to the shaft by an adhesive interposed between the shaft and the elastic body. A heating coil disposed outside the outer peripheral surface with a predetermined gap; a high-frequency transmitter for supplying a high-frequency current to the heating coil; a cylindrical moving body movable along the outer peripheral surface of the shaft; A control device for controlling these, and by supplying a high-frequency current from a high-frequency transmitter to a heating coil by means of a control signal from the control device to inductively heat the magnetic body, To move the used elastic body from the shaft. And wherein the vent to Rukoto.

According to the first aspect of the present invention, the outer peripheral surface of the shaft made of a magnetic material or the magnetic material interposed between the outer peripheral surface and the elastic body is induction-heated, and the outer peripheral surface of the shaft By moving the cylindrical moving body along the axis, the used elastic body is burned out from the shaft, so that the used elastic body can be easily removed from the shaft, and the shaft with elastic body can be easily recycled. Moreover, it can be performed at low cost.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an embodiment of a recycling apparatus according to the present invention. In the figure, a recycling apparatus 1 is supported by a shaft support means 5 that supports a shaft 2 in which a shaft hole 3a of an elastic body 3 is fitted and inserted into an outer peripheral surface 2a via an adhesive 4, and this shaft support means 5. Shaft rotating means 6 for rotating the shaft 2 in a predetermined direction at a predetermined speed, a heating coil 7 arranged outside the outer peripheral surface of the elastic body 3 with a predetermined interval, and a high-frequency current in the heating coil 7 And a control device 9 composed of a sequencer, a microcomputer, and the like for controlling them.

  The shaft 2 is formed of a metal rod made of a magnetic material such as stainless steel material, and the elastic body 3 is formed of, for example, sponge, rubber or the like, and has an outer diameter of the shaft 2 at its axial position. The shaft hole 3a which is substantially the same or slightly larger is formed. An adhesive 4 made of a thermosetting resin that is cured while being melted at a predetermined temperature is interposed between the outer peripheral surface 2 a of the shaft 2 and the shaft hole 3 a of the elastic body 3.

  The shaft support means 5 is provided at both ends in the axial direction so that the shaft 2 can be rotatably supported in a horizontal state, for example. The shaft rotating means 6 is constituted by a motor or the like, for example, and can be made at a predetermined rotational speed by a control signal from the control device 9.

  The heating coil 7 is formed, for example, by winding a copper pipe covered with an insulating material a predetermined number of times so that the outer peripheral shape is formed into a substantially cylindrical shape, and both ends of the copper pipe are output transformers (not shown) of the high-frequency oscillator 8. It is connected to the. Of course, the heating coil 7 is not limited to a cylindrical shape, and may be formed in a horseshoe shape or other appropriate shape.

  The high-frequency oscillator 8 has an inverter circuit using semiconductor switching elements such as IGBT, FET, SIT, and an output modifier connected to the output side of the inverter circuit, and generates a high-frequency current with a predetermined output at a predetermined frequency. It outputs to the heating coil 7.

  According to this recycling apparatus 1, first, the shaft hole 3a of the elastic body 3 is inserted into the shaft 2 by an automatic machine or the like in the insertion process (hereinafter referred to as the shaft 2 with the elastic body), and this shaft with the elastic body is used. 2 is conveyed to the heating process position and supported on the shaft support means 5. When the elastic body 3 is inserted into the shaft 2, the adhesive 4 is directly applied to the outer peripheral surface 2a of the shaft 2 or the inner peripheral surface of the shaft hole 3a, or a tape or the like coated with the adhesive 4 is applied to the outer peripheral surface of the shaft. The adhesive 4 is interposed between the outer peripheral surface 2a of the shaft 2 and the shaft hole 3a of the elastic body 3 by being wound around 2a.

  In this state, the shaft rotating means 6 is operated by the control signal of the control device 9 to rotate the shaft 2 with the elastic body. Further, at the same time as the rotation of the elastic shaft 2 or around a predetermined time of the rotation start, the high frequency oscillator 8 is operated by a control signal of the control device 9 to supply a high frequency current of a predetermined frequency to the heating coil 7.

  When a high frequency current is supplied to the heating coil 7, a magnetic flux is generated from the heating coil 7 and an eddy current is induced on the outer peripheral surface 2a of the shaft 2 made of a magnetic material. Induction heating. At this time, since the eddy current acts only on the shaft 2 made of a magnetic material and the shaft 2 is locally induction heated, direct heating of the elastic body 3 as in the prior art is prevented, and the elastic body 3 A change in elastic modulus or the like is reliably prevented.

  When the outer peripheral surface 2a of the shaft 2 is induction-heated for a predetermined time, the adhesive 4 interposed between the outer peripheral surface 2a of the shaft 2 and the shaft hole 3a of the elastic body 3 is melted by the heat of induction heating. Curing with heat at a predetermined temperature. Then, the elastic body shaft 2 with the adhesive 4 heat-cured is naturally cooled or forcedly cooled by a fan or the like, whereby the adhesive 4 is completely cured and the elastic body 3 is firmly attached to the outer peripheral surface 2a of the shaft 2. Adhered and fixed to.

  The shaft 2 with an elastic body manufactured in this manner can rapidly heat a predetermined portion of the shaft 2 by using induction heating, shortening the heating time, and induction heating while rotating the shaft 2. It becomes possible to manufacture the shaft 2 with an elastic body excellent in quality, such as being able to easily obtain a uniform heating state over the entire surface 2a, at a low cost. As a result, even if this elastic shaft 2 is used as, for example, a paper feed roller of a printer or a roller for printing banknotes, it can be used with a stable quality over a long period of time.

  For example, when the elastic body 3 is worn due to the use of a roller, the elastic body 3 can be burned out from the shaft 2 while being induction-heated by the recycling apparatus 1. In this case, as shown by a two-dot chain line in FIG. 1, a cylindrical moving body 10 that moves along the outer peripheral surface 2 a of the shaft 2 is provided, and the moving body 10 is controlled by the control device 9 in the induction heating state of the shaft 2. Move with the control signal. Thereby, the elastic body 3 hardened | cured by use can be extracted from the axis | shaft 2, the recycle use of the axis | shaft 2 excellent in durability is attained, and the cost of the axis | shaft 2 with an elastic body can be reduced further.

  FIG. 2 shows another embodiment of the recycling apparatus of the present invention. In addition, the same code | symbol is attached | subjected and demonstrated to the same site | part as the said Example. The recycling apparatus 1 is characterized in that the induction heating of the shaft 2 is performed in a vacuum state. The shaft 2 with an elastic body is supported in the vacuum case 11 and the vacuum case 11 is connected to the vacuum device 12. Then, the inside of the vacuum case 11 is brought into a vacuum state by operating the vacuum device 12 with a control signal of the control device 9.

  In this vacuum state, the high-frequency oscillator 8 is operated by a control signal from the control device 9 to supply a high-frequency current to the heating coil 7, the outer peripheral surface 2 a of the shaft 2 is induction-heated, and the elastic body 3 is fixed to the shaft 2. To do. According to this embodiment, since induction heating is performed in a vacuum state, no scale or the like is generated in the heated portion of the shaft 2 during induction heating, and the unevenness on the inner peripheral surface of the shaft hole 3a of the elastic body 3 is pulled. In this state, the depth of the unevenness itself becomes shallow, the contact area with the outer peripheral surface 2a of the shaft 2 is increased, and the adhesive strength can be increased.

  In the above embodiment, the case where the entire shaft 2 is a magnetic body has been described. However, the present invention is not limited to this, and for example, only a part of the shaft 2 on the outer peripheral surface 2a side is formed of a magnetic body. The part in which the magnetic body is mixed in the shaft hole 3 a of the elastic body 3 can be formed integrally (or separately), or the adhesive 4 containing the magnetic body can be used as the adhesive 4. When a magnetic material is used as part of the elastic body 3 or the adhesive 4, a non-magnetic material such as high-hardness plastic can be used as the shaft 2 and the range of applicable rollers is greatly expanded. .

Basic configuration diagram showing an embodiment of a recycling apparatus according to the present invention Basic configuration diagram showing another embodiment

  DESCRIPTION OF SYMBOLS 1 ... Recycling device, 2 ... Shaft, 2a ... Outer peripheral surface, 3 ... Elastic body, 3a ... Shaft hole, 4 ... Adhesive, 5 ... Shaft support means, 6 ... shaft rotating means, 7 ... heating coil, 8 ... high frequency oscillator, 9 ... control device, 10 ... moving body, 11 ... vacuum case, 12 ... vacuum device.

Claims (1)

The outer peripheral surface of the shaft into which the shaft hole of the elastic body is inserted is formed of a magnetic body, or the magnetic body is disposed on the inner peripheral surface of the shaft hole of the elastic body, and between the shaft and the elastic body An elastic shaft recycling apparatus in which an elastic body is fixed to the shaft by an interposed adhesive,
A heating coil disposed outside the outer peripheral surface of the elastic body with a predetermined gap, a high-frequency transmitter for supplying a high-frequency current to the heating coil, and a cylindrical shape movable along the outer peripheral surface of the shaft And a control device for controlling these, and in response to a control signal from the control device, a high frequency current is supplied from a high frequency oscillator to the heating coil to inductively heat the magnetic body, by moving along the outer circumferential surface of the shaft, the recycling apparatus of the elastic shank, wherein to Rukoto punching baked spent elastic body from the axis.

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