JP2005008407A - Running device for sheet, manufacturing device and manufacturing method for sheet, and performance measuring method for running device for sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a running device for sheet capable of letting a sheet run stably, adjusting suction force of sheet to the optimum extent, and causing suction function and support function of sheet by a series of air streams. <P>SOLUTION: A nozzle having a blow-out part for gas, a flat part provided at a position facing a sheet running passage, and an inclined part inclined in the direction in which it leaves the sheet provided in succession to the flat part is provided on an upper side or a lower side for a running face of sheet. Gas is blown out from the blow-out part for gas of the nozzle to let the sheet run. Length of the inclined part is 100 mm or more. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a stable traveling device for a sheet that stably travels a sheet of paper, plastic film, or metal foil traveling in a sheet traveling path, a sheet manufacturing apparatus and manufacturing method, and a performance measuring method for the sheet traveling apparatus. is there.

  A conventional sheet stabilization device for a seat includes a nozzle installed along a sheet traveling path, and blows gas from the nozzle to stably travel the sheet (for example, see Patent Documents 1 and 2). The nozzle includes a gas blowing part, a flat part facing the sheet traveling path, and an inclined part spreading facing the sheet traveling path. The gas supplied to the nozzle from the fan or heat exchanger and blown out from the blowing part passes between the seat running path and the flat part, is guided to the inclined part, and the gas passing through the inclined part is caused by the negative pressure due to the Coanda effect. Aspirate the sheet.

Further, by selecting the opening angle formed by the flat portion and the inclined portion of the nozzle so as to satisfy the range of 0 ° to less than 10 ° (preferably 0 ° to less than 5 °), the component force of the sheet tension (nozzle There has been proposed a nozzle that generates a sheet suction force that is superior to a force in a direction in which the sheet is separated from (see, for example, Patent Document 3). By disposing the nozzles at appropriate intervals along the sheet traveling path, the sheet continuously travels stably. At this time, it is conceivable to install a blocking plate between the nozzles in order to prevent the gas blown from the front nozzle from flowing into the rear nozzle in the continuously arranged nozzles. It is also conceivable to prevent the inflow of gas to the rear nozzle by using a breathable material or a member having a vent for the nozzle inclined portion. In addition to the nozzle that sucks the sheet by the negative pressure at the opening, a nozzle that supports the sheet by using the blowing of gas at the blowout port has been proposed (for example, see Patent Document 4).
Japanese Patent No. 3177834 (page 1-2) JP 2000-354815 A (page 1-2) Japanese Patent Laid-Open No. 2000-230782 (page 1-2) JP 2001-277349 A (page 1-2)

  However, in the above sheet stabilizer, the suction force to the sheet cannot be adjusted when the sheet thickness changes, the sheet traveling speed, the atmosphere (temperature, humidity) around the sheet, or the tensile tension of the sheet changes. In addition, the fluttering of the sheet becomes large, and the sheet may be scratched by contact with the nozzle. In that case, as described in Patent Document 3, the suction angle is adjusted by selecting the opening angle so as to satisfy the range of 0 degree to less than 10 degrees (preferably 0 degree to less than 5 degrees). Sufficient suction may not be obtained. Furthermore, in order to increase the suction force, it is necessary to increase the air volume. However, the increase in the air volume causes a problem that the sheet is fluttered violently. In this case, since the suction function at the nozzle opening portion cannot avoid the contact of the nozzles of the sheet due to flapping, a supporting force is required for positively pulling the sheet away from the nozzles for stable running.

  In addition, as shown in FIG. 5, when the nozzles are installed at appropriate intervals along the sheet traveling direction, when the amount of gas blown from the front nozzle 30 increases, an extra space is provided between the rear nozzle 31 and the sheet. There is a risk that the gas flows in and merges with the gas blown out from the rear nozzle 31 to form a complicated flow, the sheet flutters, and comes into contact with the nozzle. In that case, in order to prevent the flow of gas from the front nozzle 30, a method of installing a gas shielding plate in the proximity position of the sheet can be considered, but the problem is that the sheet breaks when the gas shielding plate comes into contact with the sheet. Produce.

  Furthermore, if a material with air permeability or a member with a vent hole is used in the nozzle inclined part, the gas is disturbed and unstable, causing a problem that the sheet flickers violently and contacts the nozzle and breaks the sheet. .

  In addition, when a nozzle using gas blowing as described in Patent Document 4 is used, the flapping of the sheet cannot be suppressed only by the support function at the blowing portion, and the nozzle and the flap are brought into contact with each other. This causes the problem of tearing. When the blown air volume is increased, the seat swells greatly, deviates from the conventional seat travel path, and there is a problem that the flap installation position can be installed only at a location that is not affected by the blown air volume. In that case, the gap between a sheet | seat and a flap cannot be narrowed, but the problem that between heat processing chambers cannot be interrupted arises.

  In addition, as a method of measuring the performance of the nozzle, the support performance and suction performance of the nozzle were measured by actually running the sheet and observing the flapping behavior of the sheet. was there. For this reason, the nozzle shape is optimized by repeating the trial production, which causes a problem of production cost and production time.

  Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art, to adjust the suction force of the sheet more optimally and to generate a sheet suction function and a support function with a series of air flows. An object of the present invention is to provide a stabilizer, a sheet manufacturing apparatus and method, and a performance measuring method for a sheet traveling apparatus.

In order to achieve the above object, the present invention employs the following configuration. That is,
(1) A nozzle having a gas blowing portion, a flat portion provided at a position facing the sheet traveling passage, and an inclined portion inclined in a direction away from the sheet provided following the flat portion, A device installed on the upper side or the lower side with respect to the running surface and running the sheet by blowing gas from the gas blowing portion of the nozzle, wherein the length of the inclined portion is 100 mm or more. Seat travel device.

  (2) The seat travel device according to (1), wherein an opening angle θ between the flat portion and the inclined portion is in a range of more than 0 degree and not more than 35 degrees.

  (3) The seat travel device according to claim (1) or (2), wherein a gap distance between the blowing portions is in a range of 1 to 10 mm.

  (4) The traveling device for seats according to any one of (1) to (3), wherein the length of the flat portion is in a range of 50 to 200 mm.

  (5) The seat travel device according to any one of (1) to (4), wherein an amount of gas blown from the blowout port is adjustable.

  (6) The traveling device for a seat according to any one of (1) to (5), wherein a length of the inclined portion is 500 mm or less.

  (7) The traveling device for a seat according to any one of (1) to (6), wherein the blowing portion, the flat portion, and the inclined portion are adjustable in the width direction of the seat.

  (8) The sheet is blown out of the gas from a nozzle having a gas blowing section, a guide plate for guiding the gas emitted from the blowing section, and a flat portion provided at a position facing the guide plate sheet travel path. The sheet traveling apparatus according to (7), wherein the sheet traveling apparatus includes a fixed nozzle and at least one moving nozzle, and the moving nozzle is housed in the fixed nozzle.

  (9) The seat travel device according to (7) and (8), wherein the length in the width direction of the gas blowing portion of the fixed nozzle is longer than the flat portion.

  (10) The sheet travel device according to any one of (7) to (9), characterized in that a movable nozzle is provided at each end of the fixed nozzle.

  (11) The seat travel device according to any one of (7) to (10), further including a balance adjustment mechanism that adjusts a wind speed balance between the fixed nozzle and the moving nozzle.

  (12) A sheet manufacturing apparatus comprising the sheet traveling device according to any one of (1) to (11).

  (13) A heat treatment chamber for performing heat treatment of the sheet is provided, and the sheet traveling device according to any one of (1) to (11) is provided at one or both of an inlet and an outlet of the heat treatment chamber. Sheet manufacturing equipment.

  (14) The sheet manufacturing apparatus according to (13), further including an openable / closable flap at a position opposite to the nozzle via a sheet traveling surface of the sheet traveling apparatus.

  (15) The sheet manufacturing apparatus according to (14), wherein the flap is in a range of 50 mm or less in the front-rear direction from directly above the opening.

  (16) The sheet manufacturing apparatus according to any one of (12) to (16), wherein the sheet traveling device includes a lifting mechanism capable of moving up and down in a vertical direction.

  (17) A sheet manufacturing method comprising manufacturing a sheet using the sheet manufacturing apparatus according to any one of (12) to (16).

  (18) In a seat traveling method in which gas is blown out from a nozzle having a gas blowing portion and a flat portion that is joined to the blowing portion and is provided at a position facing the sheet running passage, the seat is fixed. A sheet traveling method comprising: a nozzle and at least one moving nozzle, and following the width variation of the sheet by moving the moving nozzle.

  (19) The width in the width direction of the gas blowing gap of the fixed nozzle is longer than the flat part, the gas blown from the gap of the part longer than the flat part, the gas blown from the part, and the gas blowing gap of the blowing nozzle of the moving nozzle The method of traveling a seat according to (18), wherein the gas is discharged in a double manner with the gas emitted from the air.

  (20) A pseudo plate having a through hole is installed in the seat travel passage, a pressure gauge is inserted into the through hole of the pseudo plate, and the pressure on the seat travel surface is measured by the pressure gauge in a pseudo manner. A method for measuring the performance of a traveling device for a seat.

  The sheet traveling device of the present invention can stably move the sheet and increase the suction force of the sheet. Moreover, the sheet manufacturing apparatus of the present invention can efficiently perform heat treatment by having a heat treatment chamber in which the sheet can travel stably. In particular, even in the case of a sheet that easily comes into contact with the nozzle, stable running can be performed without contact.

  The seat travel device of the present invention includes a nozzle having a gas blowing portion installed on the upper side or the lower side with respect to the travel surface of the seat. The nozzle has a flat portion at a position facing the sheet traveling passage and at a position adjacent to the gas blowing portion, and further provided from the sheet facing the sheet traveling passage, which is provided subsequent to the flat portion. It has an inclined part that inclines in the direction of leaving. The gas blown out from the blowing portion passes between the sheet traveling path and the flat portion, is guided to the inclined portion, and the gas passing through the inclined portion sucks the sheet with a negative pressure due to the Coanda effect. At that time, by setting the length of the inclined portion to 100 mm or more, gas separation from the inclined portion is suppressed, and further, the negative pressure is increased, that is, the suction force is increased by guiding the reattachment of the separation. it can. In addition, it is preferable that the length of the said inclination part shall be 500 mm or less.

  In the seat travel device of the present invention, it is preferable that the opening angle θ between the flat portion and the inclined portion is in the range of more than 0 degree and not more than 35 degrees. By setting it as this range, it can peel smoothly and can increase attraction | suction force from the increase in a negative pressure. By adjusting the opening angle and the length of the inclined portion, the suction force can be increased by generating the optimum negative pressure. From these viewpoints, the opening angle θ between the flat portion and the inclined portion is more preferably 2 degrees or more.

  In the seat travel device of the present invention, it is preferable that the gap distance of the blowing portion is in the range of 1 to 10 mm. By setting it as this range, the gas from a blowing part can be uniformly blown off in the nozzle width direction. By blowing the gas uniformly from the outlet, fluttering can be suppressed because the suction force in the sheet width direction can be kept constant.

  Further, in the seat travel device of the present invention, the length of the flat portion is preferably in the range of 50 to 200 mm. By setting it within this range, it is possible to generate a force that sufficiently supports the sheet on the flat portion, and this supporting force acts in a direction in which the sheet does not come into contact with the nozzle, unlike the suction force of the sheet due to negative pressure.

In the seat travel device of the present invention, it is preferable that the air volume can be adjusted steplessly. By making the adjustment possible, the suction force of the seat can be adjusted. In this case, the air volume is preferably in the range of 5 to ³⁰ m ³ / min per 1 m of the sheet width.

  In the sheet travel device of the present invention, it is preferable that the nozzle blowing portion, the flat portion, and the inclined portion have a two-layer or more multilayer structure that allows adjustment in the sheet width direction. Thereby, the nozzle width can be adjusted in accordance with the change in the width direction of the sheet. The composite structure is preferably a structure in which the central nozzle is a fixed nozzle fixed and the end is housed in the fixed nozzle. The width direction length of the blowing portion of the fixed nozzle is the width direction of the flat portion of the fixed nozzle. The structure is longer than the length and the blowout part of the fixed nozzle protrudes from the end, and it is desirable to have moving nozzles at both ends of the fixed nozzle respectively. Adjustment to adjust the wind speed balance between the fixed nozzle and the moving nozzle It is desirable to have a mechanism.

  In the seat travel device of the present invention, it is preferable that the nozzles are continuously arranged at appropriate intervals in the seat travel direction. When continuously disposed, as shown in FIG. 5, the length of the nozzle inclined portion satisfies the above-described range even if the amount of gas blown from the front nozzle 30 increases, so the gas is inclined. Since the gas flows along the portion, the flow of excess gas between the rear nozzle 31 and the sheet is reduced, and the contact of the sheet with the gas shielding plate 32 disposed between the nozzles is eliminated. Further, even if the gas blocking plate 32 is not provided, there is no sheet flutter. In this case, it is preferable to use a material having no air permeability or a member having no air hole for the nozzle inclined portion.

  In addition, the sheet manufacturing apparatus of the present invention can suppress the sheet fluttering, reduce the sheet breakage, and stably travel by installing the above-described sheet traveling device at an arbitrary position of the belt-shaped sheet. .

  In addition, the sheet manufacturing apparatus of the present invention suppresses sheet fluttering and stably travels by installing a sheet stable traveling device in one or both of the entrance and exit of the heat treatment chamber for heat treating the sheet. Can be preferable. If fluttering can be prevented, the gap between the sheet and the nozzle can be reduced, that is, the gap at the entrance and exit of the heat treatment chamber can be reduced. When the gap is narrowed, heat can be prevented from entering and exiting, and the heat treatment chamber has an independent air circulation so that heat treatment can be performed efficiently.

  In the sheet manufacturing apparatus of the present invention, a flap that can be opened and closed is preferably installed between the sheet and the wall surface in order to further narrow the gap between the inlet and / or the outlet of the heat treatment chamber. The flap can be opened and closed according to the state of the sheet, closed during heat treatment, and opened when the sheet is replaced or torn. Furthermore, the gap between the seat and the flap can be narrowed by installing the flap within a range of 50 mm or less immediately above the opening portion and before and after the traveling direction of the seat.

  In addition, the sheet manufacturing apparatus of the present invention has a lifting mechanism in which the nozzles installed at the inlet and / or outlet of the heat treatment chamber can move up and down in the vertical direction (up and down direction), so that contact of the sheet can be avoided, and maintenance of the nozzle Improves. It also has a gap narrowing function.

  In the performance measuring method of the seat travel device of the present invention, a pseudo plate having a through hole instead of a seat is installed in the seat travel path substantially parallel to the flat portion, and a pressure gauge is inserted into the through hole and inserted. Thus, the pressure on the seat travel path can be measured.

  Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings.

  FIG. 1 is a side sectional view showing an example of a nozzle according to the present invention.

  FIG. 2 is a tilt view showing an example of a nozzle according to the present invention.

  FIG. 3 is an inclined view showing an example of a nozzle having a two-layer structure having a sheet width direction adjusting mechanism according to the present invention.

  FIG. 4 is a side sectional view showing an example of the seat traveling device according to the present invention.

  FIG. 5 is a side cross-sectional view showing an example of nozzles arranged continuously at appropriate intervals in the sheet traveling direction.

  FIG. 6 is a side sectional view showing an example of a nozzle having a short inclined portion.

  FIG. 7 is a graph showing the length of the inclined portion on the horizontal axis and the pressure generated just above the opening portion on the vertical axis.

  FIG. 8 is a side sectional view of the apparatus used for measuring the performance of the seat traveling apparatus according to the present invention.

  FIG. 9 is a pressure distribution diagram along the seat travel surface.

  FIG. 10 is an inclined view showing an example of a nozzle having a two-layer structure having an adjustment mechanism in the width direction according to the present invention and having a contact prevention function.

  FIG. 11 is a plan view showing an example of a nozzle having a two-layer structure having an adjustment mechanism in the width direction according to the present invention and having a contact prevention function.

  FIG. 12 is a cross-sectional view showing an example of a nozzle having an adjustment mechanism for adjusting the balance of the wind speeds of the fixed nozzle and the moving nozzle according to the present invention.

  In the embodiment shown in FIG. 4, the sheet traveling device of the present invention blows gas (for example, gas or inert gas) to the nozzle 21, the duct 21 for passing gas through the nozzle 1, the flexible duct 23 that can expand and contract in the vertical direction, and the nozzle. The unit includes the blower 22, the flap 18, and the lifting mechanism 17. In this case, the belt-like sheet 14 is positioned substantially in the middle of the nozzle 1 having the flap 18 that can be opened and closed and the lifting mechanism 17. The belt-like sheet 14 continuously moves in the traveling direction, but may be operated in a batch. The flap 18 is positioned almost immediately above the opening, but may be located at a position where the gas blowout port, the flat portion, the inclined portion, or the nozzle is removed back and forth. Preferably, it is good to be located in the range within 50 mm back and forth from right above the opening. The blower 22 includes a fan or a heat exchanger that heats and cools the gas. The gas blown from the blower 22 may be a fresh gas or a circulating gas, and may have an intake port and an exhaust port. Reference numeral 50 indicates the outside (inner chamber) of the heat treatment chamber, and reference numeral 51 indicates the inner chamber (outside) of the heat treatment chamber. The temperature of the heat treatment chamber is maintained at a constant temperature between 30 ° C. and 500 ° C., for example, at which the plastic film is heat treated.

  The nozzle is formed in a box shape and may have a width direction adjusting mechanism that varies depending on the width of the belt-like sheet.

  The flat part 11 is a nozzle flat part facing or parallel to or substantially parallel to the sheet traveling path of FIG. Here, “substantially parallel” means having an angle of 5 degrees or less, preferably 2 degrees or less with respect to parallelism. The inclined portion 13 is a nozzle plane portion that faces the seat traveling passage of FIG. The opening portion 12 is a joint portion between the flat portion 11 and the inclined portion 13. The opening angle θ is an angle θ formed by the flat portion 11 and the inclined portion 13. The gap distance 16 is a gap distance between the slit-like gas outlets provided along the width direction of the sheet (a gas outlet gap distance in the sheet traveling direction).

  In the nozzle having the sheet width direction adjusting mechanism, the slit-shaped outlet also changes in the width direction with respect to the sheet width change.

  Gas is blown out obliquely from the nozzle installed on the upper or lower side of the sheet running surface. The blown-out gas flows through the flat portion 11 and the inclined portion 13, and the sheet is sucked into the nozzle by the Coanda effect (negative pressure) at the opening portion 12. In this case, since the nozzle and the sheet do not contact, the sheet surface is not damaged.

  In the case of having a width direction adjusting mechanism composed of a fixed nozzle and a moving nozzle stored in the fixed nozzle, as shown in FIGS. 10 and 11, the sheet sucked by the opening 123 of the moving nozzle 120 is fixed to the fixed nozzle 110. However, it is preferable that the length in the width direction of the blowing portion 114 of the fixed nozzle 110 is longer than that of the flat portion 115 by having the notch portion 112. Outside the notch 112 of the fixed nozzle 110, the fixed nozzle gas 111 that is a gas blown from the blowing portion 114 of the fixed nozzle 110 and the moving nozzle gas 121 that is a gas blown from the blowing portion 124 of the moving nozzle 120. Becomes a double flow, preventing the sheet from being sucked more than necessary, and preventing the nozzle and the sheet from contacting each other.

  Further, it is desirable that the fixed nozzle is disposed near the center of the sheet, and the moving nozzle 120 is disposed at both ends of the fixed nozzle 110. As a result, it is possible to follow changes in both end positions of the sheet.

  Further, the adjustment of the wind speed balance between the fixed nozzle gas 111 and the moving nozzle gas 121 is performed by supplying the gas sent from the blower 22 to the fixed nozzle 110 via the duct 21 and the flexible duct 23 as shown in FIG. When the gas supplied to the fixed nozzle 110 is blown out from the blowing portion 114 of the fixed nozzle 110 and is supplied to the moving nozzle 120 through the connection pipe 116, the damper 117 installed at the entrance of the connection pipe 116. It is desirable to do by. In addition, when the movable nozzles 120 are provided at both ends of the fixed nozzle, it is most desirable that a damper 117 is installed in each.

  The sheet suction force is determined by the air volume, the opening angle, and the length of the inclined portion, and the sheet support force is determined by the air volume, the length of the flat portion, and the outlet gap distance. By adjusting these, the seat can travel stably.

  The surface material of the nozzle may be a resin material such as a metal material or plastic, and in particular, the surface material of the nozzle inclined portion may be a material having air permeability.

  The surface shape of the nozzle inclined portion may be, for example, a shape having a circular or slit-like air hole.

  The gas blowing direction of the nozzle may be the sheet traveling direction or the traveling reverse direction, and the gas blowing angle may be parallel or perpendicular to the sheet traveling direction. Preferably, 45 ± 20 degrees with respect to the seat traveling direction is good.

  Furthermore, it may be a blowout shape along a contour curved outward like the surface contour of an airplane main wing, or a blowout shape along the circumferential direction of a cylinder or an elliptic cylinder.

  In the present invention, when the nozzle width is the same as the sheet width or when the nozzle width is larger than the sheet width, the sheet can be sucked as usual, and even when the nozzle width is smaller than the sheet width, the sheet can be sucked.

  The temperature of the gas blown from the nozzle may be normal temperature, or a temperature of the heat treatment chamber, for example, a heating temperature range of 50 ° C. to 400 ° C., or a cooling temperature range of −20 ° C. to 0 ° C.

  The humidity of the gas blown from the nozzle may be a sufficiently dry gas or a sufficiently wet gas. For example, when the residual heat, cooling, stretching, heat setting and heat treatment found in plastic film production equipment are performed in multiple rooms, nozzles are installed above and below the partition wall of each heat treatment chamber or near one of the entrances / exits. Also good. When there is a small room in the heat treatment chamber, a nozzle may be installed above or below the wall of the small room or near one of the entrances.

  The gas blown from the nozzle installed in the heat treatment chamber can blow out gas having a temperature and humidity equivalent to the heat treatment chamber temperature toward the heat treatment chamber. In this case, the gas in the heat treatment chamber is sucked from the gas intake port attached to the upper or lower part of the nozzle, sent out to the nozzle by a fan, and blown out from the blowout port, so that an independent circulation flow is provided in each room of the heat treatment chamber. Can produce. Thus, an energy-saving heat treatment chamber is possible without adversely affecting the energy balance of the heat treatment chamber.

  In the present invention, a pseudo plate 61 provided with a through hole 62 instead of a seat in the seat travel path is installed substantially in parallel with the flat portion, and the pressure gauge 60 is inserted into the through hole 62 so that the pseudo plate 61 is inserted. In addition, the pressure distribution on the seat running surface can be measured. The material used as the pseudo plate 61 may be a metal plate, a resin material, or wood. What is necessary is just to determine the diameter of the through-hole 62 according to the diameter of the sensor of a pressure gauge.

(Example 1)
FIG. 6 is a side sectional view showing a seat traveling device with a short inclined portion, and FIG. 1 is a side sectional view showing an example of the seat traveling device of the present invention. In the apparatus of FIG. 6, the gas blown out from the blow-out port passes through the nozzle flat part and the inclined part and generates a negative pressure at the opening part to suck the sheet. In this case, the angle formed by the flat portion and the inclined portion (opening angle θ) is more preferably an angle exceeding 0 degree and not more than 35 degrees, and more preferably not more than 10 degrees. However, considering the gas peeling mechanism, only the angle is limited. Is not enough. If the opening angle is within the above range and the length of the inclined portion is shorter than 100 mm, the gas separation cannot be suppressed, or the reattachment force of the separation cannot be obtained. A negative pressure that exceeds the component force (force in the direction of separating the sheet from the nozzle), that is, the suction force of the sheet cannot be obtained.

  As shown in FIG. 7, it can be understood that the negative pressure at the opening portion is −10 mmAq (−100 Pa) or less, and the length of the inclined portion is 100 mm or more. When the length of the inclined part is shorter than 100 mm, the sheet surface pressure at the opening part becomes -10 mmAq (-100 Pa) or more, and a sufficient suction force is not generated. is there. Therefore, it was necessary to increase the air volume in order to increase the suction force of the sheet. In addition, the suction force of the sheet can be obtained sufficiently locally at the opening, but there is a risk of contact with the nozzle if the sheet flutters without generating force to support the sheet at other inclined and flat parts. There is sex. Therefore, the sheet traveling device of the present invention of FIG. 1 can sufficiently generate the sheet suction force by setting the length of the inclined portion to 100 mm or more. As shown in FIG. 7, when the length of the inclined portion is 500 mm or more, the negative pressure of the opening portion does not change. Therefore, the length of the inclined portion is preferably 500 mm or less. The sheet travel device of the present invention also has a function of positively supporting the belt-like sheet by the gas blown out from the outlet. Since the gas blown out from the nozzle outlet flows continuously through the flat part and the inclined part, the suction force at the opening part and the supporting force at the outlet part are generated at the same time, so that the sheet can stably run without contact. be able to. As shown in FIG. 9, the pressure on the seat traveling road surface becomes the pressure side at the blowout port, becomes the negative pressure side at the opening portion, and becomes the atmospheric pressure at the inclined portion. This pressurization and negative pressure become the support force and the suction force.

(Example 2)
When the length of the inclined portion is 100 mm or more and the opening angle between the flat portion and the inclined portion is in the range of more than 0 degree and not more than 35 degrees, the optimum negative pressure can be generated. On the other hand, when the opening angle is 0 ° or less, the gas flow becomes a jet, which is not preferable because negative pressure is hardly generated. On the other hand, when the opening angle exceeds 35 degrees, the Coanda effect is weakened, so the negative pressure is reduced and the suction force is lowered, which is not preferable.

Example 3
It is not preferable that the gap distance between the blowing portions is less than 1 mm because the pressure loss increases near the blowing portion and it becomes difficult to obtain a sufficient air volume. Moreover, when the gap distance of the blowing part exceeds 10 mm, the blown-out gas tends to be uneven in the width direction, which is not preferable. The occurrence of unevenness in the width direction causes fluttering. Therefore, it is preferable to set the gap distance in the range of 1 to 10 mm because the gas from the blowing portion can be blown out uniformly in the nozzle width direction.

(Example 4)
It is preferable that the length of the flat portion is in the range of 50 to 200 mm because a force for sufficiently supporting the sheet can be generated. Unlike the sheet suction force due to negative pressure, this support force acts as a force that prevents the sheet from contacting the nozzle. On the other hand, when the length of the flat portion exceeds 200 mm, the support force to the sheet by the blown-out gas cannot be obtained sufficiently, which is not preferable. In addition, when the length of the flat portion is smaller than 50 mm, the blown gas is not rectified, so that it is difficult to obtain a sufficient suction force at the opening portion, which is not preferable.

(Example 5)
By making it possible to adjust the air volume from the gas outlet of the nozzle, it is preferable because the suction force of the sheet can be increased and the flutter can be finely adjusted. The air volume is preferably in the range of 5 to ³⁰ m ³ / min per 1 m width of the sheet.

(Example 6)
As shown in FIG. 3, it is preferable to have a two-layer structure in which the nozzle blowing portion, the flat portion, and the inclined portion can be adjusted in the sheet width direction with respect to changes in the sheet width direction. That is, nozzles having different nozzle blowing portions, flat portions, and inclined portions in the sheet width direction can be provided side by side. Thus, a sufficient suction force can be obtained even for a wide sheet. However, in the case of a sheet that is easy to contact, since the sheet may come into contact with the opening of the fixed nozzle, the nozzle may not be brought close to the sheet.

(Example 7)
By installing the sheet traveling device of the present invention in one or both of the inlet and outlet of the heat treatment chamber for performing heat treatment of the sheet, stable sheet traveling can be suppressed while suppressing sheet flutter. At this time, the upper gap 20 between the sheet and the nozzle can be minimized, and the lower gap 19 between the sheet and the flap can be narrowed. By providing a flap that can be opened and closed, the lower gap can be dealt with by opening it during heat treatment and closing it when the sheet is torn. Furthermore, as shown in FIG. 9, the negative pressure generated at the opening is the largest, and the negative pressure is generated up to a range within 50 mm before and after that. The negative pressure suppresses the fluttering of the sheet by the suction force, thereby allowing stable running. Therefore, the lower gap 19 between the seat and the flap can be narrowed by installing the flap within the above range. Furthermore, it is preferable that an elevating mechanism 17 is installed in the nozzle 1, and the gap gap can be adjusted by elevating the nozzle in the vertical direction by the elevating mechanism 17. As for the gas to be blown out, a gas having the same temperature as that of the heat treatment chamber is blown out in addition to the case of normal temperature.

(Example 8)
As shown in FIG. 8, the performance measuring method of the seat travel device is such that a pseudo plate 61 (in this embodiment, an acrylic plate is used) having a through hole 62 instead of a seat on the seat travel path is substantially parallel to the nozzle flat portion. The pressure distribution on the seat traveling road surface can be measured by installing the pressure gauge 60 in the through hole. The pressure distribution measured in that case is shown in FIG. From this, the performance of the support force and suction force of the nozzle can be evaluated. FIG. 7 shows the result of measuring the pressure immediately above the opening using the same method and the difference in the length of the inclined portion.

Example 9
As shown in FIGS. 10 and 11, when a part of the moving nozzle 120 is accommodated in the fixed nozzle 110, the length in the width direction of the blowing portion 114 of the fixed nozzle 110 is cut longer than the flat portion 115. By disposing the notch 112, the fixed nozzle gas 111, which is a gas blown from the blowing part 114 of the fixed nozzle 110, and the blowing part 124 of the moving nozzle 120, outside the notch 112 of the fixed nozzle 110. The moving nozzle gas 121, which is a blown-out gas, can have a double flow, prevents the sheet 14 from being sucked more than necessary, and even if the sheet is easy to contact, the nozzle 1 and the sheet 14 The nozzle 1 and the sheet 14 can travel without being in contact with each other.

(Example 10)
When a part of the moving nozzle 120 is stored in the fixed nozzle 110, the fixed nozzle 110 is disposed near the center of the sheet, and the moving nozzle 120 is disposed at both ends of the fixed nozzle 110. desirable. Thereby, it is possible to follow changes in both end positions of the sheet 1.

(Example 11)
As shown in FIGS. 10, 11, and 12, when a part of the moving nozzle 120 is accommodated in the fixed nozzle 110, the damper 117 that adjusts the wind speed balance between the fixed nozzle gas 111 and the moving nozzle gas 121 includes the fixed nozzle 110. The seat 14 is stabilized by adjusting the opening degree of the damper 117 to 80% when the damper 117 is 100% when the damper 117 is fully open. Can be run.

  The sheet traveling device of the present invention can stably move the sheet and increase the suction force of the sheet. Moreover, the sheet manufacturing apparatus of the present invention can efficiently perform heat treatment by having a heat treatment chamber in which the sheet can travel stably.

It is side surface sectional drawing which shows an example of the nozzle concerning this invention. It is an inclination figure which shows an example of the nozzle concerning this invention. It is an inclined view which shows an example of the nozzle which has a two-layer structure which has the adjustment mechanism of the width direction concerning this invention. It is side surface sectional drawing which shows an example of the traveling apparatus for sheets concerning this invention. It is side surface sectional drawing which shows an example of the nozzle continuously arrange | positioned for every space | interval suitably with respect to the sheet | seat running direction. It is side surface sectional drawing which shows the example of the nozzle with the short length of an inclination part. It is a graph which shows the pressure which generate | occur | produces just above an opening part by the difference in the length of an inclination part. It is apparatus side surface sectional drawing used for the performance measurement of a sheet | seat traveling apparatus. It is a pressure distribution map along the seat travel road surface. It is an inclined view which shows an example of the nozzle which has the adjustment mechanism of the width direction concerning this invention, and has a 2 layer structure which had a contact prevention function. It is a top view which shows an example of the nozzle which has the adjustment mechanism of the width direction concerning this invention, and has a 2 layer structure which had a contact prevention function. It is sectional drawing which shows an example of the nozzle which has an adjustment mechanism for adjusting the balance of the wind speed of the fixed nozzle concerning this invention, and a moving nozzle.

Explanation of symbols

1: Nozzle 11: Flat part 12: Opening part 13: Inclined part 14: Seat 16: Gap distance 17: Lifting mechanism 18: Flap 19: Gap 20: Upper gap 21: Duct 22: Blower (including fan and heat exchanger) )
23: Flexible duct 30: Front nozzle 31: Back nozzle 32: Gas blocking wall 50: Outside of heat treatment chamber (inner chamber)
51: Interior of heat treatment room (outside)
60: Pressure gauge 61: Pseudo plate 62: Through hole 110: Fixed nozzle 111: Fixed nozzle gas 112: Notch part 113: Opening part 114: Blowing part 115: Flat part 116: Connection pipe 117: Damper 120: Moving nozzle 121 : Moving nozzle gas 123: Opening part 124: Blowing part 125: Flat part

Claims (20)

A nozzle having a gas blowing portion, a flat portion provided at a position facing the sheet traveling passage, and an inclined portion inclined in a direction away from the sheet provided following the flat portion is provided on the sheet traveling surface. In contrast, the apparatus is installed on the upper side or the lower side and causes the sheet to travel by blowing gas from the gas blowing portion of the nozzle, wherein the inclined portion has a length of 100 mm or more. apparatus. 2. The seat travel device according to claim 1, wherein an opening angle θ between the flat portion and the inclined portion is in a range of more than 0 degree and not more than 35 degrees. The seat travel device according to claim 1 or 2, wherein a gap distance between the blowout portions is in a range of 1 to 10 mm. The length of the said flat part is the range of 50-200 mm, The traveling apparatus for sheets in any one of Claims 1-3 characterized by the above-mentioned. The seat travel device according to any one of claims 1 to 4, wherein an air volume of the gas blown from the blowout port is adjustable. The seat traveling device according to any one of claims 1 to 5, wherein a length of the inclined portion is 500 mm or less. The traveling device for a seat according to any one of claims 1 to 6, wherein the blowing portion, the flat portion, and the inclined portion are adjustable in the width direction of the seat. A sheet that blows gas and travels a sheet from a nozzle having a gas blowing part, a guide plate that guides gas emitted from the blowing part, and a flat part provided at a position facing the guide plate sheet travel path The traveling device for a seat according to claim 7, wherein the traveling device has a fixed nozzle and at least one moving nozzle, and the moving nozzle is accommodated in the fixed nozzle. The seat travel device according to claim 7 and 8, wherein the length of the gas blowing portion of the fixed nozzle in the width direction is longer than that of the flat portion. The traveling apparatus for seats according to claim 7, further comprising moving nozzles at both ends of the fixed nozzle. The seat travel device according to claim 7, further comprising a balance adjusting mechanism that adjusts a wind speed balance between the fixed nozzle and the moving nozzle. A sheet manufacturing apparatus comprising the sheet traveling apparatus according to claim 1. An apparatus for manufacturing a sheet, comprising: a heat treatment chamber for performing heat treatment of the sheet, and the sheet traveling device according to any one of claims 1 to 11 at one or both of an inlet and an outlet of the heat treatment chamber. The sheet manufacturing apparatus according to claim 13, further comprising a flap that can be opened and closed at a position opposite to the nozzle via a sheet traveling surface of the sheet traveling apparatus. The sheet manufacturing apparatus according to claim 14, wherein the flap is in a range of 50 mm or less from directly above the opening portion. The sheet manufacturing apparatus according to any one of claims 12 to 16, wherein the sheet traveling device includes an elevating mechanism capable of elevating in the vertical direction. A sheet manufacturing method comprising manufacturing a sheet using the sheet manufacturing apparatus according to claim 12. In a sheet traveling method in which gas is blown out from a nozzle having a gas blowing portion and a flat portion that is joined to the blowing portion and is provided at a position facing the sheet traveling passage, at least a fixed nozzle and A sheet traveling method comprising: one moving nozzle, and following the width variation of the sheet by moving the moving nozzle. The length in the width direction of the gas blowing gap of the fixed nozzle is longer than the flat part, the gas blown from the gap of the part longer than the flat part, the gas blown from the part, and the gas blowing gap of the moving nozzle. The seat traveling method according to claim 18, wherein the sheet is blown out in a double manner with a gas. A seat characterized in that a pseudo plate having a through hole is installed in the seat travel passage, a pressure gauge is inserted into the through hole of the pseudo plate, and the pressure on the seat travel surface is measured in a pseudo manner by the pressure gauge. Method for measuring the performance of a vehicle traveling device.

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