JP4587986B2 - Heat roller - Google Patents

Description

  The present invention relates to a heat roller provided with a jacket chamber that encloses a gas-liquid two-phase heat medium in a thick portion, and more particularly, to a hermetic seal of the jacket chamber.

  For example, it is well known to use a roller that generates heat while rotating in a process of continuously heat-treating a material to be treated such as a plastic film, a nonwoven fabric, or a metal foil, or a material to be treated such as a web material. A typical example will be described with an induction heating roller device using the induction heating mechanism shown in each of FIGS. 1 is a roller, 2 and 3 are journals integrally connected to both ends of the roller 1, and the outer ends of the journals are drive shaft portions 2A and 3A. Is supported rotatably. And it is rotated by the driving force given from the outside.

  Reference numeral 7 denotes an induction heating mechanism, which includes a cylindrical iron core 9 supported on the outer periphery of the holder 8 and an induction coil 10 wound around the outer periphery. It is well known that an alternating magnetic flux is generated by exciting the induction coil 10 with an alternating current power source, and the alternating magnetic flux causes the roller 1 to generate induction heat. Reference numerals 11 and 12 denote support rods integrally extending from both ends of the induction heat generating mechanism 7, each of which is inserted into each of the journals 2 and 3, and the drive shafts 2A and 3A via the bearings 13 and 14, respectively. Is supported against. As a result, the induction heating mechanism 7 is supported in a suspended state inside the roller 1.

  A lead wire 15 is connected to the induction coil 10, passes through one support rod 12, is led out from the outer end thereof, and is connected to an AC power source for excitation. Reference numeral 16 denotes a rotation stopper for preventing the support rod 12 from being rotated by the rotation of the roller 1. Reference numeral 17 denotes a temperature detector for detecting the temperature of the roller 1, and is inserted through the thick portion of the peripheral wall of the roller 1. Reference numeral 18 denotes a lead wire which passes through the journal 3 and the drive shaft portion 3A as shown in the figure and is connected to the rotation-side wire ring 20 of the rotary transformer 19. The fixed-side wire ring 21 of the rotary transformer 19 is connected to the output terminal 22. The temperature signal detected by the temperature detector 17 is taken out through the rotary transformer 19.

  In the heat roller device having such a configuration, in order to make the temperature distribution on the outer periphery of the roller 1 uniform, a plurality of jacket chambers 25 penetrating along the axial direction of the peripheral wall of the roller 1 are provided. Provided. The jacket chamber 25 is configured by providing a hole in the thick part of the roller 1 by drilling. A gas-liquid two-phase heat medium is hermetically sealed inside. The jacket chambers 25 may be communicated with each other.

  The conventional roller 1 includes a roller main body 1A and rings 27 and 28 facing each end face thereof. That is, the rings 27 and 28 are integrated with the roller body by welding to hermetically seal the jacket chamber. When it is necessary to communicate each jacket chamber, an annular groove 29 is formed along the circumferential direction on the end face of the ring, and each ring chamber 29 faces the end of the jacket chamber 25 so that the ring groove 29 faces the end of the jacket chamber 25. 27 and 28 are abutted against the end face of the roller body 1A.

  And the inner periphery and outer periphery of the butted part are welded, the roller main body 1A and the rings 27 and 28 are integrated, and the jacket chamber is hermetically sealed. Reference numeral 30 denotes the welding point. The rings 27 and 28 are fixed to the journals 2 and 3 by bolts 31 (see FIG. 7). As the annular groove 29 faces the open end of each jacket chamber 25, the jacket chambers 25 communicate with each other as described above.

  However, in order to weld the ring, it is necessary to give a groove to the welded part prior to welding. Further, when welding is performed on the outer periphery of the roller main body 1A, it is necessary to insert the welding machine into the roller main body 1A, especially when the diameter of the roller main body 1A is large. When it is small, it is difficult and the enclosure of the jacket chamber may be incomplete.

  When the temperature detector 17 is to be installed outside the jacket chamber 25 in the thick portion of the roller body, a hole for inserting the temperature detector must be provided at the installation location. However, since there is a welding point 30 on the outer periphery of the roller body 1A, it is necessary to provide a hole for inserting the temperature detector while avoiding this portion. Therefore, a sufficient thickness must be provided between the jacket chamber 25 and the outer periphery of the roller body 1A, and a sufficient thickness must be provided between the bottom of the welded portion 30 and the jacket chamber 25. There is a drawback of increasing the size. In order to avoid this, a temperature detector may be inserted into the jacket chamber as shown in FIG. 4, but for this purpose, a pipe 32 must be provided to keep the jacket chamber airtight, and thus the configuration There was a problem that became complicated and troublesome.

  The problem to be solved by the present invention is to reliably seal a plurality of holes serving as a jacket chamber that encloses a gas-liquid two-phase heat medium that opens at the end face of the roller body, regardless of the diameter of the roller body. In addition, a heat roller having a reduced thickness from the jacket chamber to the outer surface of the roller main body is provided to solve such a problem.

In the present invention, a heat source is provided in the hollow of a hollow cylindrical roller body in which a plurality of holes serving as a jacket chamber for enclosing a gas-liquid two-phase heat medium in a thick part are provided along the axial direction. In the heat roller for heat-treating the workpiece to be in contact with the surface, the plurality of holes opened on both end surfaces of the roller main body are the end surfaces of a solid annular ring having the same diameter as the roller main body , or the roller One end surface of the main body is hermetically sealed by surface welding by friction welding of the end surface of the journal that abuts the end surface of the ring and the other end surface is in contact with the end surface of the roller body, and penetrates the surface bonding portion by friction welding. The main feature is that a hole for inserting a temperature sensor extending into the wall thickness in the vicinity of the outer peripheral surface of the roller body is formed .

In the present invention, since a plurality of opening holes at both end portions of the jacket chamber provided in the roller body are hermetically sealed by surface joining of the annular solid ring or the ring and the journal by friction welding, before welding. Therefore, the required groove processing is unnecessary, and the work required for sealing is simpler than the welding work, so that the work time can be shortened and the labor for the work can be reduced. In addition, complete sealing can be obtained regardless of the diameter and thickness of the roller body, and the heat roller can be highly reliable without leakage of liquid in the jacket chamber. Furthermore, it is possible to reduce the wall thickness of the beveling portion of the case by welding, Ri foot of a small size as a roller body, furthermore, the inside wall thickness in the vicinity of the outer peripheral surface of the roller body temperature detector Since it is installed, there is an effect that the surface temperature of the roller body can be accurately detected .

Regardless of the diameter of the roller body, the plurality of holes serving as a jacket chamber for enclosing the gas-liquid two-phase heat medium that opens at the end face of the roller body are securely sealed, and from the jacket chamber of the roller body 1A For the purpose of providing a heat roller with a reduced wall thickness to the outer surface, a plurality of holes serving as jacket chambers opened at the end face of the roller body are formed by surface contact by friction welding of a solid annular ring having the same diameter as the roller body. This was realized by hermetically sealing. Hereinafter, a heat roller according to an embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a cross-sectional view of a heat roller device according to an embodiment of the present invention, and FIGS. 2 and 3 are enlarged perspective views showing an essential part in an exploded manner. In addition, the part which attached | subjected the code | symbol same as the code | symbol of each figure after FIG. 7 shows the part which is the same or respond | corresponds. As shown in FIGS. 1 and 2, the end surface of a solid annular ring 27 having the same diameter as the roller body 1A is directly opposed to at least one end surface of the roller body 1A. When it is necessary to communicate the jacket chamber 25, an annular communication groove 29 is provided on the end surface of the ring 27 facing the end surface of the roller body 1 </ b> A. The end faces facing each other are integrally joined by friction welding.

Specifically, after the roller main body 1A is fixed, the roller main body 1A is rotated in a state where the end face of the ring 27 is in pressure contact with the end face, and the two surfaces are joined by the frictional heat generated at that time. By this joining, it is possible to hermetically seal the openings of a plurality of holes that become the jacket chamber 25 that opens at the end face of the roller body 1A. Reference numeral 40 in FIG. 1 indicates the surface joint portion. Further, when the ring 27 is surface-bonded to the roller body 1A, the communication groove 29 faces the opening end surface of the jacket chamber 25, thereby communicating the jacket chamber 25 with each other.

The other end face of the roller main body 1A directly faces the end face of the journal 3, as shown in FIGS. When it is necessary to communicate the jacket chamber 25, an annular communication groove 29 </ b> A is provided on the end surface of the journal 3 facing the end surface of the roller body 1 </ b> A. The end faces facing each other are integrally surface-bonded by friction welding. Specifically, like the surface joining of the ring 27, the roller main body 1A is fixed, and then rotated with the end face of the journal 3 being in pressure contact with the end face. Surface bonding. Reference numeral 40 </ b> A in FIG. 1 indicates the surface joint portion. Further, when the journal 3 is surface-bonded to the roller body 1A, the communication groove 29A faces the opening end surface of the jacket chamber 25, thereby communicating the jacket chamber 25 with each other.

In this way, after the ring 27 and the journal 3 are surface-bonded to the end surface of the roller body 1A, the induction heating mechanism 7 and the support rods 11 and 12 integrated with the induction heating mechanism 7 are installed inside the roller body 1A from the ring 27 side. Then, the journal 2 is fixed to the ring 27 by tightening bolts 31 (see FIG. 1). FIG. 1 shows the roller device thus completed.

When the temperature detector 17 is installed, as shown in FIGS. 4 and 5, a pore 42 is provided through the journal 3 between the jacket chamber 25 and the outer periphery of the roller body 1 </ b> A in the thick portion of the roller body 1 </ b> A. . And the temperature detector 17 is inserted and installed here. In this case, since there is no welded portion as in the prior art, the thick portion between the jacket chamber 25 and the outer periphery of the roller body 1A only needs to be thick enough to form the pores 42. It is possible to make the roller thinner than that of the roller, that is, the roller having a smaller outer diameter. Even if the pores 42 are provided through the journal 2 and the ring 27, a roller having a smaller thickness than that of the conventional one, that is, a roller having a small outer diameter can be obtained. Eventually, the pores 42 are formed inside the wall near the outer peripheral surface of the roller body 1A.

  In the above embodiment, as shown in FIG. 6A, the communication groove 29 or 29A is provided on the ring 27 or the journal 3 side, but instead, as shown in FIG. 6B. The communication groove 29 'or 29A' may be provided on one end surface or both end surfaces of the roller body 1A. Further, as shown in FIG. 6C, in addition to the configuration in which the communication groove 29 or 29A is provided on the ring 27 or the journal 3 side, the communication groove 29 or 29A is provided in the communication groove 29 or 29A as shown in FIG. A communication groove 29 ″ or 29A ″ may be provided on one end face or both end faces of the roller 1A so as to face each other.

In each embodiment, combined interview a solid annular ring 27 at one end the roller body 1A and the diameter surface of the roller body 1A, combined interview journal 3 to the end face of the other hand, the roller body 1A The openings 25 of the plurality of holes serving as jacket chambers opened at the end face of the roller main body 1A formed in the wall thickness are hermetically sealed. However, although it takes some time, the other end face is replaced with one of the journals 3. Similarly to the end face, a solid annular ring 27 may be hermetically sealed by friction welding. In this case, the journal 3 is fixed to the ring 27 by tightening bolts 31.

It is sectional drawing of the heat roller apparatus which concerns on 1st Example of this invention. FIG. 2 is a partial exploded perspective view of FIG. 1. It is a disassembled perspective view of the other part of FIG. It is a partial expanded sectional view of FIG. It is sectional drawing which follows the NN line | wire of FIG. It is a fragmentary sectional view showing other examples of the present invention. It is sectional drawing of the heat roller apparatus of a prior art example. It is principal part sectional drawing of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Roller 1A Roller main body 7 Induction heating mechanism 2, 3 Journal 17 Temperature detector 25 Jacket chamber 27 Ring 29, 29A Communication groove 40, 40A Surface joint part

Claims (3)

A heat source is provided in the hollow of a hollow cylindrical roller body in which a plurality of holes serving as a jacket chamber that encloses a gas-liquid two-phase heat medium in the thick part penetrates along the axial direction, and comes into contact with the surface. In a heat roller for heat-treating an object to be processed, the plurality of holes opened on both end surfaces of the roller body are formed on the end surface of a solid annular ring having the same diameter as the roller body or the end surface of the roller body. One end is the end surface of the ring and the other end surface is hermetically sealed by surface welding by friction welding of the end surface of the journal that contacts the end surface of the roller body, and passes through the surface bonding portion by friction welding, and the roller A heat roller having a pore for inserting a temperature sensor extending inside a wall thickness in the vicinity of the outer peripheral surface of the main body . 2. An annular communication groove that communicates a plurality of jackets of the roller body is formed on the end surface of the ring and the end surface of the journal that are surface-bonded by friction welding on both end surfaces of the roller body. The described heat roller. The heat roller according to claim 1 or 2, wherein an annular communication groove for communicating a plurality of jackets is formed on an end surface of the roller body.

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