JP2007279030A - Rotary roll temperature measuring device, rotary roll equipped with this temperature measuring device, and temperature measuring method - Google Patents

Abstract

An apparatus for measuring a temperature of a rotary roll is provided.
A temperature measurement device for a rotary roll includes a resistance temperature detector 30 embedded in a surface layer of a cylindrical body 11, a transmission unit 31 attached to an inner surface of a resin end cover 23, and two A receiver, and a control unit that determines whether the reception state of each receiver is good or not, selects temperature information in a good reception state, and displays temperature data based on the selected temperature information . The transmission unit 32 includes a transmitter including the transmission antenna 31 and a battery that supplies power to the transmitter. The two receiving antennas are arranged at positions that do not shadow the cooling roll rotating shaft 12 at the same time with respect to the transmission antenna 31 during one rotation of the cooling roll.
[Selection] Figure 3

Description

  The present invention relates to a temperature measuring device for a rotary roll, a rotary roll equipped with this temperature measuring device, and a temperature measuring method, and more specifically, manufacturing various sheets and various films such as cellophane, aluminum foil, paper, and synthetic resin. For devices, processing devices for these various sheets and various films, laminating devices for laminating or laminating a plurality of the same or different kinds of these various sheets and various films, or for the various sheets and various films The present invention relates to a temperature measuring device for a rotary roll used in an extrusion laminating apparatus or the like for laminating a synthetic resin while extruding it into a film, a rotary roll equipped with this temperature measuring device, and a temperature measuring method.

  A rotary cooling roll will be described as an example of this type of rotary roll. In such a rotary cooling roll, in order to quickly cool an object to be cooled such as a resin sheet or for product surface temperature management, etc. It is necessary to constantly monitor the surface temperature of the cooling roll and control the amount of cooling water supplied as necessary. Therefore, a temperature sensor is provided on the surface of the cooling roll, and the measured temperature detected by the temperature sensor is monitored.

  By the way, in such a temperature measuring device, since the cooling roll is a rotating body, it is difficult to connect the wiring in the wired system in which the temperature information from the temperature sensor is extracted to the outside by the signal line and the data is supplied to the display monitor. . Therefore, a wireless temperature measuring device has been proposed (see, for example, Japanese Patent Application Laid-Open No. 62-207146). This wireless temperature measuring device is equipped with a transmission loop antenna on the rotating shaft of the cooling roll, transmits the measurement value detected by the temperature sensor from the loop antenna with a weak radio wave, and is provided in the vicinity of the rotating cooling roll. The surface temperature is detected by receiving with the receiving loop antenna.

JP 62-207146 A

By the way, this kind of cooling roll is frequently subjected to roll replacement work by changing the production line or the like in addition to periodic inspection. Specifically, replacement work is required in the following cases.
Roll replacement is performed by changing a production line of a resin film or a resin sheet that is an object to be cooled. For example, when the type of resin such as a resin film is different, it has a diameter and length corresponding to the use of a roll that has been surface-treated according to it, or the change in thickness and film width of the resin film, etc. Replacement work is required due to the use of rolls.
Since it is necessary to frequently replace the cooling roll as described above, when an antenna or a generator is attached to the rotating shaft like the temperature measuring device to which the wireless method described in Patent Document 1 is applied, The lifting tool must be attached to the rotating shaft while avoiding the portion, which becomes an obstacle during the replacement work and makes the replacement work difficult.

Therefore, instead of mounting the transmission antenna on the rotating shaft, it is conceivable to provide the transmitting antenna on the outer surface of the end cover of the cooling roll and arrange one receiving antenna in the vicinity of the rotating shaft of the cooling roll. However, with such a configuration, during one rotation of the cooling roll, the reception antenna enters the shadow of the rotation axis with respect to the transmission antenna, and a situation in which the reception state is extremely bad occurs. In other words, there is a problem that the roll surface temperature cannot always be accurately received during the rotation of the cooling roll.
The rotary heat roll also has the same problem as that of the rotary cooling roll.

  The present invention has been devised in view of the above circumstances, and its purpose is to always receive the roll surface temperature accurately and eliminate the need for a special operation at the time of roll replacement work. It is to provide a temperature measurement device for a rotary roll that can be easily replaced by a rotary roll, a rotary roll equipped with this temperature measurement device, and a temperature measurement method.

  In order to achieve the above object, the invention according to claim 1 of the present invention comprises a cylindrical body in contact with an object to be heated which is heated or cooled on the outer peripheral surface, and an end cover which covers both ends of the cylindrical body. And a rotary shaft protruding outward from the center of the both end covers, and at least one end cover of the both end covers is a non-metallic rotary roll temperature measuring device. A temperature detection means provided in a contact area of the cylindrical body with the object to be heat-treated, and a transmission unit attached to an inner surface of the non-metallic end cover on the one end side, comprising a transmission antenna The transmitter includes a transmitter that transmits temperature information from the temperature detection means, and a battery that supplies power to the transmitter. The transmitter includes a receiving antenna and a transmitter that transmits power from the transmitting antenna. First and second receivers for receiving the temperature information to be received, wherein the receiving antennas of the respective receivers are arranged at positions that do not shadow the rotating shaft simultaneously with the transmitting antenna during one rotation of the roll. The selection of the temperature information in the good reception state by determining whether the reception state of the first and second receivers and the first and second receivers is good or bad respectively And a control unit for displaying the temperature on the display based on the temperature information.

  As described above, by attaching the transmission unit having the transmitter with the transmission antenna to the inner surface of the non-metallic end cover, the weak radio wave from the transmission antenna is not shielded by the end cover. Moreover, the problem of obstructing the roll replacement work as in the conventional example in which the transmitter is mounted on the rotating shaft is solved.

  Further, the first and second receiver antennas are arranged at positions that do not shadow the transmission axis at the same time with respect to the transmission antenna during one rotation of the roll. And the reception state of at least one of the second receiver is always good. Further, the control unit discriminates whether the reception status of the first and second receivers is good or not, selects temperature information in the good reception status, and displays the temperature on the display based on the selected temperature information. I do. As a result, the surface temperature is always monitored on the display without being temporarily disabled during the rotation of the roll.

In addition, the term “non-metallic” means any of those made of resin, such as resin, wood, cardboard, glass, tempered glass, and processed mineral material (for example, mica board (mica)). Including. The term “rotary roll” includes both a rotary cooling roll and a rotary heat roll. The rotary cooling roll is a so-called heat pipe type cooling roll in which a working fluid that repeats evaporation and condensation is filled in a cylindrical body and a cooling pipe through which cooling water flows is provided. Well, for example, a cooling roll having a structure in which a lid with a hollow shaft is attached to a pipe-shaped roll, cooling water is supplied from one shaft portion, and discharged from the other shaft portion, It may be a spiral cooling roll or the like provided with a spiral cooling water pipe inside so that the temperature of the roll surface is uniform. The rotary heat roll is a so-called heat pipe type heat in which a cylindrical body is filled with a working fluid that repeats evaporation and condensation, and a superheat pipe through which superheated water (or superheated steam) flows is provided. For example, a pipe-shaped roll is attached to a lid with a hollow shaft, superheated water (or superheated steam) is supplied from one shaft portion, and discharged from the other shaft portion. It may be a heat roll, or may be a spiral heat roll or the like in which a spiral superheated water (or superheated steam) pipe is provided inside and the temperature of the roll surface is made uniform.
In addition, the term “substance to be heat-treated” includes both an object to be heated in the case of a rotary heat roll, and both an object to be cooled in a rotary cooling roll.

The invention according to claim 2 is the temperature measuring device for a rotary roll according to claim 1, wherein the shape of the transmitting antenna is L-shaped.
With the above configuration, the reception state is further improved.

A third aspect of the present invention is the temperature measuring device for a rotary roll according to the first or second aspect, wherein the receiving antenna is arranged perpendicular to the transmitting antenna.
With the above configuration, the reception state is further improved.

The invention according to claim 4 is the temperature measuring device for the rotary roll according to claim 1, wherein the rotary roll includes a cylindrical body whose outer peripheral surface is in contact with the sheet to be cooled, and both ends of the cylindrical body. An end cover that covers each part, and a hollow rotating shaft that protrudes outward from the center of the both end covers, and at least one end cover of the both end covers is made of non-metal, The inside of the cylindrical body is filled with a working fluid that repeats evaporation and condensation, and has a cooling pipe through which the cooling fluid from the hollow rotating shaft flows, and the cooling fluid that flows inside the cooling pipe The rotary cooling roll is configured to indirectly cool the working fluid.
With the above configuration, the surface temperature of a so-called heat pipe type cooling roll can always be accurately monitored.

The invention according to claim 5 is the temperature measuring device for a rotary roll according to claim 1, wherein the rotary roll includes a cylindrical body in contact with an overheated sheet on an outer peripheral surface, and both ends of the cylindrical body. An end cover that covers each part, and a hollow rotating shaft that protrudes outward from the center of both end covers, and the inside of the cylindrical body is filled with a working fluid that repeats evaporation and condensation, and It is a rotary heating roll having a superheated pipe through which superheated fluid supplied from a hollow rotating shaft flows, and configured to indirectly heat the working fluid with the superheated fluid flowing through the superheated pipe. It is characterized by.
With the above configuration, the surface temperature of a so-called heat pipe type heat roll can always be accurately monitored.

  A sixth aspect of the present invention is a rotary roll comprising the rotary roll temperature measuring device according to any one of the first to fifth aspects.

  Further, the invention according to claim 7 is a cylinder body that is in contact with an object to be heated or cooled on the outer peripheral surface, an end cover that covers both ends of the cylinder body, and an outer cover that is outside the center of the both end covers. And a rotating roll temperature measuring method having a structure in which at least one end cover of the both end covers is made of non-metal, and the cylindrical body to be heat-treated A temperature measuring step for measuring the surface temperature of the contact region by means of temperature detection means provided in the contact region, and the temperature information measured by the temperature measurement step is stored in the non-metallic end cover on the one end side. A transmission step of transmitting using a transmitter provided on the side surface, and a first and a first that are arranged at positions that are not shadowed by the rotation axis simultaneously with the transmitter during one rotation of the roll; And receiving the temperature information transmitted from the transmitter, and determining whether the reception state of the first and second receivers is good or not, and obtaining temperature information in a good reception state. And a temperature display control step for selecting and displaying a temperature based on the selected temperature information.

  With the above configuration, it is possible to always monitor the surface temperature on the display without temporarily disabling display during the rotation of the roll.

  According to the present invention, it is possible to always receive the roll surface temperature accurately and eliminate the need for a special operation at the time of roll replacement work, and it is possible to easily perform the replacement work with a simple operation.

  In the following embodiments, a temperature measurement device for a rotary cooling roll will be described in detail as an example of a temperature measurement device for a rotary roll according to the present invention. In addition, this invention is not limited to the following embodiment, It can apply also to the temperature measuring apparatus of a rotary thermo roll.

(Embodiment)
FIG. 1 is a diagram showing a schematic configuration of an extrusion laminating machine provided with a temperature measuring device for a rotary cooling roll according to an embodiment.
As shown in FIG. 1, when manufacturing laminated laminated paper in which a synthetic resin film is bonded to paper, a raw paper 2 fed out from a roll-shaped base paper 1 is converted into a pair of rotary pressing rolls 3 and rotary cooling. After passing between the rolls 4, the take-up roll 5 is wound up, and the molten synthetic resin 7 in the resin holder 6 a is formed in a film form on the upper part between the rotary pressing roll 3 and the rotary cooling roll 4. An extruding die 6b that is pushed out to the outside is disposed, and a synthetic resin film 8 that is pushed out from the extruding die 6b is fed between the rotary pressing roll 3 and the rotary cooling roll 4 together with the raw paper 2. Thus, the synthetic resin film 8 is bonded to the raw paper 2 while being cooled by the rotary cooling roll 4 to produce a laminated laminated paper 9.

FIG. 2 is a diagram showing an overall configuration of a cooling roll provided with a temperature measuring device for a rotary cooling roll according to an embodiment, FIG. 3 is a sectional view of the cooling roll, and FIG. 4 is an enlarged sectional view in the vicinity of the end of the cooling roll. 5 is a view of the resin end cover provided on one end side of the cooling roll as viewed from the inside, FIG. 6 is an enlarged plan view of the receiving antenna, FIG. 7 is a view showing the support structure of the cooling roll, and FIG. The side view seen from the right side of the support structure of the cooling roll shown in FIG. 7, FIG. 9 is a figure for demonstrating the temperature measurement operation | movement by a temperature measuring device.
As shown in FIGS. 2 and 3, the rotary cooling roll 4 includes a cylindrical body 11 in which a sheet to be cooled such as the raw paper 2 shown in FIG. 1 is in contact with the outer peripheral surface, and the centers of the left and right ends of the cylindrical body 11. And a hollow rotating shaft 12 inserted so as to protrude outward from. The cylindrical body 11 is provided with sealing plates 13 and 14 for hermetically sealing the inside. The rotary shaft 12 penetrates through the centers of the sealing plates 13 and 14, and the sealing plates 13 and 14 are fixed to the rotary shaft 12. Is sealed. The inside of the cylindrical body 11 is filled with a working fluid that repeats evaporation and condensation, such as naphthalene or quinoline.
The rotary cooling roll 4 is pivotally supported by bearings 15 and 16 (see FIG. 7) on the airframe side at both ends 12a and 12b of the rotary shaft 12.

  Water chamber lid plates 17 and 18 are provided outside the sealing plates 13 and 14 in the cylindrical body 11, respectively. The water chamber lid plates 17 and 18 and the sealing plates 13 and 14 are provided. Water chambers 19 and 20 are constituted by the inner peripheral surface of the cylindrical body 11. Inside the cylindrical body 11, a plurality of cooling pipes 21 extending in the axial direction of the cylindrical body 11 and having both ends passing through both the sealing plates 13 and 14 and communicating with both the water chambers 19 and 20 are provided in the circumferential direction. And the cooling water supplied into one of the water chambers 19 and 20 through the shaft hole of the rotating shaft 12 is supplied from the one water chamber 20 to each of the water chambers 20. The cooling water is distributed in the cooling pipes 21 and is discharged from the other water chamber 19 after passing through the cooling pipes 21.

  In addition, circular end covers 22 and 23 that cover both ends of the cylindrical body 11 are provided outside the water chamber lid plates 17 and 18 of the cylindrical body 11, respectively. The rotary shaft 12 passes through the centers of the end covers 22 and 23. The end covers 22 and 23 serve as decorative plates that cover the water chamber lid plates 17 and 18. Here, in the present embodiment, as will be described later, a transmission unit 32 (see FIGS. 4 and 5) including a transmission antenna 31 is attached to the inner side surface of one end cover 23 of both end covers 22 and 23. It has been. By attaching the end covers 22 and 23, spaces 24 and 25 are formed between the water chamber lid plates 17 and 18 and the end covers 22 and 23. These spaces 24 and 25 are left and right when the cooling roll is rotated. It is also used as a space for mounting balance weights for balancing. However, since the transmission antenna 31 is attached to the inner surface of the end cover 23 as described above, the space 25 is configured to be larger than the space 24 so that the space 25 is formed between the water chamber cover plate 18 and the end cover 23. An annular spacer 26 is interposed. As shown in FIG. 4, the end cover 23 is fixed to the water chamber cover plate 18 via the spacer 26 with screws 84.

  In this configuration, when the working fluid filled in the cylindrical body 11 comes into contact with the inner surface of the cylindrical body 11, the working fluid evaporates due to the heat from the sheet to be cooled that is in contact with the outer peripheral surface of the cylindrical body 11. The sheet to be cooled is cooled by repeatedly cooling and condensing upon contact with 21, liquefying, reaching the inner surface of the cylindrical body 11 and coming into contact therewith. A cooling water supply rotary joint 27 (see FIG. 7) is connected to one end of the hollow rotary shaft 12.

  By the way, the cooling roll of the said structure is equipped with the temperature measurement apparatus for measuring the cooling roll surface temperature. This temperature measuring device includes a resistance temperature detector 30 (see FIG. 2) as temperature detecting means made of platinum embedded in a surface layer of a cylindrical body 11, and a transmission antenna 31 attached to the inside of an end cover 23. And a transmitter unit 32 (see FIGS. 4 and 5) including a transmitter (specifically, a transmission circuit unit), a battery, and the like, and gantry legs 33a and 33b (see FIGS. 7 and 8) of the cooling roll. The receivers 36 and 37 (see FIGS. 7 and 8) having the receiving antennas 34 and 35 to be mounted, and the control unit 38 (see FIG. 7) for displaying temperature data from the receivers 36 and 37, etc. Consists of. In the present embodiment, the radio wave used in the transmitter is a weak radio wave having a communication distance of about 1 m. As a result, there is a merit that a large number of peripheral devices existing around the cooling roll do not have an adverse effect such as malfunction due to radio waves from the transmitter.

  The embedded position of the resistance temperature detector 30 is the outer peripheral surface of the cylindrical body 11 and at least an area where the sheet to be cooled comes into contact. The lead wire of the resistance temperature detector 30 is connected to a transmission unit 32 attached to the inner surface of the end cover 23. As shown in FIG. 4, the transmission unit 32 includes a battery 40 as a power source. As the battery 40, it is preferable to use a heat-resistant specification battery (for example, an AA type battery manufactured by Electrocbem) in consideration of the fact that the space 25 becomes hot. The battery 40 is housed in a battery box. The opening / closing lid 41 (see FIGS. 4 and 5) is fixed to the outer surface of the end cover 23 by screws 85, and the screws 85 are removed, and the opening / closing lid 41 is removed from the outer surface of the end cover 23. Thus, the battery can be replaced.

  The end cover 22 is made of metal, but the end cover 23 is made of resin (for example, vinyl chloride). The end cover is generally made of metal. However, when a metal cover is used as the end cover 23, a weak radio wave from the transmission antenna 31 is shielded by the metal end cover, and a sufficient reception state is obtained. I can't. Therefore, in this embodiment, the end cover 23 is made of resin. In the present embodiment, the end cover 23 is made of resin and the end cover 22 is made of metal. However, the present invention is not limited to this, and both the end covers 22 and 23 may be made of resin. The end cover 23 may be made of non-metal, and may be made of any material such as wood, cardboard, glass, tempered glass, or a processed material made of mineral material (for example, mica board (mica)). There may be. Further, the end cover 22 may be made of resin, wood, cardboard, glass, tempered glass, or a processed material of mineral material (for example, mica board (mica)) in addition to metal. Further, as long as the restriction that the end cover 23 is made of non-metal is satisfied, the end cover 22 and the end cover 23 are made of different materials (for example, the end cover 22 is made of resin and the end cover 23 is made of glass). There may be.

  Further, the transmission antenna 31 is provided on the inner side surface of the end cover 23 for the following reason. In other words, if the transmission antenna 31 is attached to the outer surface of the end cover 23, the transmission antenna 31 may be damaged, and it becomes an obstacle during the cooling roll replacement work, and the smooth replacement work cannot be performed. is there.

  Even if the transmitter having the transmission antenna 31 is attached to the inside of the end cover 23, the transmitter is relatively light and does not affect the balance when the cooling roll rotates. However, in the case of a small cooling roll having a small diameter, there is a risk of some influence. In such a case, a balance weight may be provided on the end cover 22 side.

  In the present embodiment, the two receivers 36 and 37 are provided for the following reason. That is, in the method using one receiving antenna, when the shape of the transmitting antenna 31 is small, radio waves from the transmitting antenna 31 may be shielded by the rotating shaft 12 and may not be received by the receiving antenna. On the other hand, when the shape of the transmission antenna 31 is large, the area shielded by the rotating shaft 12 is reduced, so that the reception state tends to be good. However, if the shape of the transmission antenna 31 is increased, the transmission energy increases, which is not appropriate for a configuration in which power consumption is reduced as much as possible by adopting a radio system of weak radio waves. If the shape of the transmission antenna 31 is too large, it is difficult to install the transmission antenna 31 on the inner side surface of the end cover 23. Accordingly, a certain restriction is imposed on the size of the shape of the transmission antenna 31 from the demand for obtaining a good reception state with low power consumption. Then, in the method using one reception antenna, there is a possibility that a good reception state cannot always be obtained while the cooling roll is rotating. Therefore, in order to solve such a problem, the present embodiment adopts a method using two receiving antennas 34 and 35.

  In the present embodiment, the transmission antenna 31 is a wire antenna bent in an L shape. By making the antenna shape L-shaped in this way, a wide range of directional characteristics can be obtained compared to a single rod-shaped antenna shape, so that the receiving accuracy at the receiving antenna is improved. As shown in FIG. 6, the transmission antenna 31 includes a first straight portion 31a and a second straight portion 31b bent at a right angle to the first straight portion 31a, and the first straight portion 31a and the second straight portion 31b. The total length of the straight portion 31b is set equal. The transmission antenna 31 is attached to the end cover 23. As shown in FIG. 5, the transmission unit 32 (corresponding to the transmitter main body) connects the center and the apex of the end cover 23 when the end cover 23 is stationary. Located on the straight line L1, the first straight line portion 31a is perpendicular to the straight line L1, and the second straight line portion 31b is arranged to be parallel to the straight line L1.

  On the other hand, as shown in FIG. 7, the receiving antennas 34 and 35 are arranged so as to be perpendicular to the transmitting antenna 31 in order to improve the receiving sensitivity. Further, the receiving antenna 34 and the receiving antenna 35 are mounted on a base. It is attached to 60 leg portions 33a and 33b. The transmitting antenna 31 and the two receiving antennas 34 and 35 are attached so as to be in the arrangement state shown in FIG. That is, the reception antenna 34 and the reception antenna 35 are arranged symmetrically with respect to a vertical line passing through the center of the end cover 23 in plan view of the end cover 23. Preferably, the position where the two receiving antennas 34 and 35 are not simultaneously shaded by the rotating shaft 12 is excluded while the transmitting antenna 31 makes one rotation accompanying the rotation of the cooling roll. With such an arrangement, it is possible to always improve the reception state. The reason will be described below.

  The transmission antenna 31 rotates with the rotation of the cooling roll. As a result, an area in which the transmission antenna 31 becomes a shadow of the rotating shaft 12 with respect to the reception antennas 34 and 35 is generated. And if a receiving antenna is located in the area | region which becomes a shadow of the rotating shaft 12, it will be interrupted | blocked by the rotating shaft 12 and favorable reception will become impossible. Therefore, if the two receiving antennas 34 and 35 are arranged so that they do not exist in the region that is the shadow of the rotating shaft 12 at the same time, at least one receiving antenna can obtain a good reception state. Therefore, as shown in FIG. 9 (1), it is assumed that the transmitting antenna 31 is present at the vertex P1 on the line perpendicular to the rotation axis 12, and the installation positions of the receiving antennas 34 and 35 with respect to this position. To decide. That is, the tangent lines M1 and M2 are drawn from the transmitting antenna 31 present at the vertex P1 to the outer peripheral surface of the rotating shaft 12, and the receiving antenna is installed outside the range S1 defined by the tangent lines M1 and M2. If the receiving antennas 34 and 35 are both installed in the range S1, the receiving antennas 34 and 35 are simultaneously shaded by the rotary shaft 12 and the reception state becomes poor. On the other hand, if the receiving antennas 34 and 35 exist outside the range S1, a good reception state can be obtained in at least one of the receiving antennas 34 and 35. Therefore, as will be described later, if the reception signals of the reception antennas 34 and 35 are judged to be good and the reception signal on the side with the good reception level is selected, the rotating body such as a cooling roll A good reception state can always be obtained. This point will be described in detail in the section “Temperature measurement operation by temperature measurement device” described later.

  FIG. 10 is a block diagram showing an electrical configuration of the temperature measuring device. The electrical configuration of the transmission unit 32 includes a sensor amplifier 50 that amplifies the detection signal from the resistance temperature detector 30, and an A / D converter 51 that converts the analog detection signal amplified by the sensor amplifier 50 into a digital detection signal. The control circuit 52 is realized by a microcomputer having the above function, the transmitter 53 includes the transmission antenna 31 described above, and the battery 40 described above. The resistance value of the resistance temperature detector 30 changes depending on the temperature, and this change is given as an analog voltage value to the sensor amplifier 50 and amplified by a predetermined gain. The analog detection signal amplified by the sensor amplifier 50 is converted into a digital detection signal by the A / D converter 51 and supplied to the control circuit 52. The control circuit 52 gives a digital detection signal to the transmitter 53. The transmitter 53 includes a transmission circuit including a modulation circuit that modulates a digital detection signal, and transmits the modulation signal on a carrier wave having a predetermined frequency and transmits it from the transmission antenna 31. Note that FM modulation or FSK modulation is performed in the modulation circuit.

  The receivers 36 and 37 provided with the receiving antennas 34 and 35 include a receiving circuit including a demodulation circuit.

  The control unit 38 receives the received signals from the receivers 36 and 37 and switches to one of the signals, and a level for determining the signal level of each received signal and outputting the switching signal of the switching circuit 55. A determination circuit 56, a control circuit 57 that inputs detected temperature data and outputs a predetermined control signal, a display 58 that monitors the surface temperature based on display data from the control circuit 57, and a commercial AC power supply 59 are supplied. And a power supply circuit 60 for converting the power supply to a DC power supply having a predetermined voltage. The DC voltage from the power supply circuit 60 is supplied to each circuit element in the control unit 38 and is also supplied as an operating power supply in the two receivers 36 and 37.

  Further, the level determination circuit 56 switches a switching signal for switching to the other reception signal side when one of the reception levels of the two receivers 36 and 37 is lower than a predetermined reference level. To 55. When the two received signals are both equal to or higher than the reference level, a predetermined receiver of the two receivers 36 and 37, in this embodiment, the received signal from the receiver 37 is selected. Yes. Therefore, for example, when the reception levels of the two receivers 36 and 37 are both equal to or higher than the reference level, the reception signal from the receiver 37 is selected. When the reception level of the receiver 37 is less than the reference level, the reception signal from the receiver 36 is selected. When the reception level of the receiver 36 is less than the reference level, the reception signal from the receiver 37 is selected.

(Temperature measurement operation by temperature measurement device)
Next, with reference to FIG. 9, a temperature measurement operation by the measurement apparatus having the above configuration will be described. 9 is a view as seen from the inside of the end cover 23. In FIG. 9, P2 is the installation position of the reception antenna 35, and P3 is the installation position of the reception antenna 34. In the state shown in FIG. 9 (1), since the receiving antennas 34 and 35 are both located outside the shadow of the rotating shaft 12 with respect to the transmitting antenna 31 during one rotation of the cooling roll, the receiving state is good. is there. In this case, since the switching circuit 55 is switched to the reception signal of the receiver 37, the reception signal from the receiver 37 is given to the control circuit 57. Next, when the state shown in FIG. 9B is reached with the rotation of the cooling roll, the receiving antenna 34 is located in a region outside the shadow of the rotating shaft 12 with respect to the transmitting antenna 31, but the receiving antenna 35 is positioned on the rotating shaft 12. The state is located in the shadow area S1. At this time, since the reception state from the receiver 37 is poor, the level determination circuit 56 determines that the reception signal from the receiver 37 is less than the reference level, and the switching circuit 55 receives the signal from the receiver 36 side. A switching signal for switching to is output. As a result, a reception signal from the receiver 36 is given to the control circuit 57.

  In the state of FIG. 9 (3) with the rotation of the cooling roll, the receiving antennas 34 and 35 are both located outside the shadow of the rotating shaft 12 with respect to the transmitting antenna 31, so that the receiving state is good. It is. At this time, since the level discrimination circuit 56 determines that the reception signals from the receivers 36 and 37 are both equal to or higher than the reference level, the level discrimination circuit 56 switches the switching circuit 55 to switch to the reception signal side from the receiver 37. Output a signal. As a result, the reception signal from the receiver 37 is given to the control circuit 57.

  Next, in the state of FIG. 9 (4) with the rotation of the cooling roll, the receiving antenna 35 is located in a region outside the shadow of the rotating shaft 12 with respect to the transmitting antenna 31, but the receiving antenna 34 is positioned on the rotating shaft 12. It will be in the state located in shadow area S1. At this time, since the reception state from the receiver 36 is poor, the level determination circuit 56 determines that the received signal is less than the reference level, but the reception state from the receiver 37 is good. Therefore, the switching state of the switching circuit 55 is maintained as it is, that is, the reception signal side from the receiver 37 is maintained. As a result, the reception signal from the receiver 37 is given to the control circuit 57.

  When the receiving antennas 34 and 35 are both located in the area outside the shadow of the rotating shaft 12 immediately before one rotation after that, since the receiving state is good, the switching circuit 55 switches the received signal side of the receiver 37 to the receiving signal side. Thus, the received signal from the receiver 37 is given to the control circuit 57. In this way, a good reception signal is always given to the control circuit 57 during one rotation of the cooling roll. Accordingly, the display 58 always monitors the surface temperature without being temporarily disabled during rotation of the cooling roll. Further, in the case where the control circuit 57 is configured to perform control for automatically controlling the cooling water in addition to monitoring the surface temperature on the display 58, a predetermined calculation is performed based on the surface temperature measurement data obtained at all times. The control amount is calculated and the opening degree of the cooling water supply valve 90 (see FIG. 7) is adjusted.

(Other matters)
(1) In the above embodiment, as the rotary cooling roll, a so-called heat is formed, in which a cylindrical body is filled with a working fluid that repeats evaporation and condensation, and a cooling pipe through which cooling water flows is provided. Although the pipe-type cooling roll is used, the present invention is not limited to this. For example, a pipe-shaped roll is attached to a lid with a hollow shaft, and cooling water is supplied from one shaft portion, and the other shaft portion is mounted. A cooling roll having a structure for discharging from the inside, a spiral cooling water pipe provided with a spiral cooling water pipe inside, and configured so that the temperature of the roll surface is uniform may be used.
Moreover, although the said embodiment demonstrated the temperature measuring apparatus of the rotary cooling roll, this invention is not limited to this, It can apply also to the temperature measuring apparatus of a rotary hot roll. The rotary heat roll is a so-called heat pipe type in which a cylindrical body is filled with a working fluid that repeats evaporation and condensation, and a superheat pipe through which superheated water (or superheated steam) flows is provided. For example, a lid with a hollow shaft is attached to a pipe-shaped roll, superheated water (or superheated steam) is supplied from one shaft portion, and discharged from the other shaft portion. It may be a heat roll having a structure, or may be a spiral heat roll or the like in which a spiral superheated water (or superheated steam) pipe is provided inside and the temperature of the roll surface is made uniform. .

  (2) In the above embodiment, the transmission antenna is formed in an L shape, but the present invention is not limited to this, and may have other shapes. In the above embodiment, the transmission antenna is a wire antenna, but a pattern antenna, a chip antenna, or the like may be used.

  (3) In the above embodiment, when the reception levels of the two receivers 36 and 37 are both equal to or higher than the reference level, the reception signal from the receiver 37 is selected. When the reception levels of the receivers 36 and 37 are both equal to or higher than the reference level, the reception signal from the receiver 36 may be selected.

  (4) Although the receiver and the control unit are configured separately and independently in the above embodiment, the receiver may be configured as a receiver having a temperature display function by incorporating the control unit in the receiver.

  The present invention is a manufacturing apparatus for various sheets and films of cellophane, aluminum foil, paper, synthetic resin, etc., a processing apparatus for these various sheets and various films, or the same or different types of these various sheets and various films. Suitable for laminating equipment for laminating or laminating multiple sheets, or for temperature measurement equipment for rotary rolls used for extruding laminating equipment for laminating synthetic resins to the various sheets and films while extruding them into a film. Can be implemented.

The figure which shows schematic structure of the extrusion-type laminating machine provided with the temperature measuring apparatus of the rotary cooling roll which concerns on embodiment. The figure which shows the whole structure of the cooling roll provided with the temperature measuring apparatus of the rotary cooling roll which concerns on embodiment. Sectional drawing of a cooling roll. The expanded sectional view near the edge part of a cooling roll. The figure which looked at the resin-made end covers with which one end side of a cooling roll is provided from the inner side. The enlarged plan view of a receiving antenna. The figure which shows the support structure of a cooling roll. The side view seen from the right side of the support structure of the cooling roll shown in FIG. The figure for demonstrating the temperature measurement operation | movement by a temperature measuring device. The block diagram which shows the electrical constitution of a temperature measuring device.

Explanation of symbols

4: Rotary cooling roll 11: Cylindrical body 12: Rotating shaft 13, 14: Sealing plate 22: Metal end cover 23: Resin end cover 23a: Inner side surface of end cover 23 25: Inner space 30: Resistance temperature detector Body 31: Transmitting antenna 32: Transmitting unit 34, 35: Receiving antenna 36, 37: Receiver 38: Control unit 40: Battery 52, 57: Control circuit 53: Transmitter 55: Switching circuit 56: Level discriminating circuit 58: Display vessel

Claims (7)

A cylindrical body that is in contact with an object to be heated or cooled on the outer peripheral surface, an end cover that covers both ends of the cylindrical body, and a rotary shaft that protrudes outward from the center of the both end covers; The end cover on at least one end side of the both end covers is a temperature measuring device for a rotary roll having a structure made of non-metal,
Temperature detecting means provided in a contact area with the object to be heat-treated of the cylindrical body,
A transmission unit attached to the inner surface of the non-metallic end cover on the one end side, comprising a transmission antenna and a transmitter for transmitting temperature information from the temperature detection means, and a battery for supplying power to the transmitter Such a transmission unit comprising:
First and second receivers each having a receiving antenna and receiving temperature information transmitted from the transmitting antenna, wherein the receiving antenna of each receiver is simultaneously with the transmitting antenna during one rotation of the roll. Such first and second receivers arranged at positions not in the shadow of the axis of rotation;
A control unit for discriminating whether the reception state of the first and second receivers is good or not, selecting temperature information in a good reception state, and displaying the temperature on the display unit based on the selected temperature information; ,
A temperature measuring device for a rotary roll, comprising:   The temperature measuring device for a rotary roll according to claim 1, wherein the shape of the transmitting antenna is L-shaped.   The temperature measuring apparatus for a rotary roll according to claim 1, wherein the receiving antenna is arranged perpendicular to the transmitting antenna.   The rotary roll includes a cylindrical body whose outer peripheral surface is in contact with the sheet to be cooled, an end cover that covers both ends of the cylindrical body, and a hollow rotating shaft that protrudes outward from the center of the both end covers. The end cover on at least one end side of the both end covers is made of non-metal, and the inside of the cylindrical body is filled with a working fluid that repeats evaporation and condensation, and is supplied from the hollow rotating shaft. A rotating chill roll configured to indirectly cool the working fluid with the cooling fluid flowing inside the cooling pipe, the cooling fluid flowing inside the cooling pipe. The temperature measuring device for a rotary roll according to 1.   The rotary roll has a cylindrical body whose outer surface is in contact with the overheated sheet, an end cover that covers both ends of the cylindrical body, and a hollow rotating shaft that protrudes outward from the center of the both end covers. And the inside of the cylindrical body is filled with a working fluid that repeats evaporation and condensation, and has a superheated tube through which the superheated fluid supplied from the hollow rotating shaft flows, and flows inside the superheated tube 2. The temperature measuring device for a rotary roll according to claim 1, wherein the temperature measuring apparatus is a rotary heating roll configured to indirectly heat the working fluid with the superheated fluid.   A rotary roll comprising the temperature measuring device for a rotary roll according to any one of claims 1 to 5. A cylindrical body that is in contact with an object to be heated or cooled on the outer peripheral surface, an end cover that covers both ends of the cylindrical body, and a rotary shaft that protrudes outward from the center of the both end covers; The end cover of at least one end side of the both end covers is a method for measuring the temperature of a rotary roll having a structure made of non-metal,
A temperature measuring step of measuring the surface temperature of the contact region by means of temperature detection means provided in the contact region with the object to be heat treated of the cylindrical body;
A transmission step of transmitting the temperature information measured by the temperature measurement step using a transmitter provided on the inner surface of the non-metallic end cover on the one end side;
The temperature information transmitted from the transmitter is received using the first and second receivers that are disposed at positions that do not shadow the rotation axis at the same time with respect to the transmitter during one rotation of the roll. Receiving step;
A temperature display control step of determining whether the reception states of the first and second receivers are good or not, selecting temperature information in a good reception state, and performing temperature display based on the selected temperature information;
A temperature measurement method for a rotary roll, comprising: