Web heat treatment device

Abstract

To provide a thermal processing apparatus for a web capable of slowly opening a horizontal opening door even if a thermal processing chamber is inclined.SOLUTION: A thermal processing chamber 10 is provided so as to be inclined at an inclination angle θ° (0°<θ°<45°) with respect to a horizontal plane. A door 20 are freely opened and closed and are opened horizontally from a higher part to a lower part in a left side wall 12 of the inclined thermal processing chamber 10. A base part of a cylinder body 46 of an air cylinder 44 is connected to the left side wall 12 above the door 20, the door 20 is connected to an end part of a rod 50 extending from the cylinder body 46, and a speed controller 62 is connected to a first closed space 58 on a side of the rod 50 in the cylinder body 46. The larger the inclination angle θ° is, the smaller a displacement volume per unit time from the speed controller 62 is set.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an apparatus for heat treating a web. [Background technology]

[0002] Conventionally, in a heat treatment apparatus, a plurality of nozzles are provided along a web transport path inside a heat treatment chamber having thermal insulation, and hot air is blown from these nozzles onto the traveling web to dry the web. An opening is provided in a side wall of the heat treatment chamber for the purpose of adjusting the nozzles inside the heat treatment chamber, and a side-opening door is provided at this opening so as to be freely opened and closed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-116111 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, if the heat treatment chamber is provided at an angle, there is a problem that when the door is opened, the door may suddenly open due to its own weight, endangering the safety of workers, or may collide with the heat treatment chamber and break.

[0005] SUMMARY OF THE PRESENT DISCLOSURE In view of the above problems, an object of the present invention is to provide a web heat treatment apparatus in which a side-opening door can be opened slowly even if the heat treatment chamber is inclined. [Means for solving the problem]

[0006] The present invention is a web heat treatment apparatus comprising: a heat treatment chamber having thermal insulation properties; a nozzle for blowing hot air onto a web running in a forward-backward direction inside the heat treatment chamber; and a door provided on a side wall of the heat treatment chamber, the heat treatment chamber being inclined in the forward-backward direction at an inclination angle θ° (0°<θ°45°) with respect to a horizontal plane; the door being freely opened and closed by opening sideways from a higher side to a lower side of the inclined heat treatment chamber; a base of a cylinder body of an air cylinder being connected to the side wall above or below the door; the door being connected to the tip of a rod extending from the cylinder body; the more the door is opened, the more the rod extends from the cylinder body; an exhaust volume adjustment device is connected to the closed space on the rod side inside the cylinder body; and the amount of exhaust per unit time from the closed space by the exhaust volume adjustment device is reduced as the inclination angle θ° increases. Effect of the Invention

[0007] According to the present invention, the larger the inclination angle of the heat treatment chamber, the smaller the amount of exhaust per unit time from the closed space on the rod side in the air cylinder, allowing the side-opening door to open more slowly. [Brief description of the drawings]

[0008] [Figure 1] 1 is a left side view of a heat treatment apparatus according to an embodiment of the present invention; [Diagram 2] FIG. 11 is an enlarged left side view of the third heat treatment chamber. [Diagram 3] FIG. 11 is a partially cutaway left side view of the third heat treatment chamber. [Figure 4] FIG. [Diagram 5] FIG. 4 is a diagram showing an air system for opening and closing the door. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] A heat treatment apparatus 1 for a web W according to one embodiment of the present invention will be described with reference to Figures 1 to 5. The web W is a long film, metal foil, paper, or the like.

[0010] (1) Structure of heat treatment device 1 The overall structure of the heat treatment apparatus 1 will be described with reference to FIG.

[0011] A base 2 is placed on a horizontal floor. An installation stand 3 is placed on the horizontal upper surface of the base 2. The installation stand 3 is formed in a so-called arch shape, with the front and rear of the upper surface curved in an arch shape with respect to the horizontal direction, the front and rear being the lowest, and the center being the highest.

[0012] Ten heat treatment chambers 10 are connected in sequence in the front-rear direction on the upper surface of the arch-shaped installation stand 3. In FIG. 1, the web W is transported from the right side (rear side) to the left side (front side) of FIG. 1. The ten heat treatment chambers 10 will be described with the reference number 10-1 for the rightmost (rear side) heat treatment chamber 10, and 10-2, ..., 10-10 for the next heat treatment chambers 10. In addition, when the ten heat treatment chambers 10-1, 10-2, ..., 10-10 are collectively described, they will be referred to as heat treatment chambers 10. As shown in FIG. 1, the heat treatment chambers 10-1, 10-2, 10-3, and 10-4 are provided in the upward direction of the arch-shaped installation stand 3, and the heat treatment chambers 10-6, 10-7, 10-8, 10-9, and 10-10 are provided in the downward direction, and each heat treatment chamber 10 is provided at an angle with respect to the horizontal plane. However, since the upper surface of the installation table 3 is not a linearly inclined surface but an arched surface, the inclination angles θ° (where 0°<θ°<45°) of the heat treatment chambers 10 are different from one another.

[0013] (2) Heat treatment chamber 10 Next, as an example of the ten heat treatment chambers 10, the third heat treatment chamber 10-3 from the right will be described with reference to FIGS.

[0014] The heat treatment chamber 10-3 is an insulating rectangular parallelepiped that is long in the front-rear direction, with its front connected to the heat treatment chamber 10-2 and its rear connected to the heat treatment chamber 10-4. The heat treatment chamber 10-3 is mounted on an arch-shaped installation stand 3 at an inclination angle of θ3° (where 0°<θ3°<45°) with respect to the horizontal plane, with the front of the heat treatment chamber 10-3 being higher than the rear. The heat treatment chamber 10-3 is not directly placed on the arch-shaped installation stand 3, but is mounted on the upper surface of the installation stand 3 using four legs 38 provided on the underside of the heat treatment chamber 10.

[0015] A substantially square opening 14 is provided in the front of the left side wall 12 of the heat treatment chamber 10-3, and a side-opening door 16 is provided at this opening 14. A substantially square opening 18 is provided in the rear of the left side wall 12 of the heat treatment chamber 10, and a side-opening door 20 is provided at this opening 18.

[0016] The left side wall 12 between the door 16 and the door 20 is provided with a window 22 and a window 26 made of rectangular insulating glass. A lid 24 is provided on the window 22, and a cover 28 is provided on the window 26. A pair of hinges 30, 30 are provided on the upper part of the lid 24 and the lid 28, respectively, so that they can be opened and closed freely in the vertical direction. An operator can lift the lid 24 or the lid 28 upward and see the inside of the heat treatment chamber 10-3 through the window 22 or the window 26.

[0017] The web W that has been heat-treated in the heat treatment chamber 10-2 is transported from the heat treatment chamber 10-2 to the rear of the heat treatment chamber 10-3, and then transported from the front of the heat treatment chamber 10-3 to the heat treatment chamber 10-4 via a transport path extending in the front-to-rear direction inside the heat treatment chamber 10-3.

[0018] A duct 32 extending in the front-rear direction is provided above the transport path of the web W, and a plurality of nozzles 34 are provided at predetermined intervals on the lower surface of the duct 32. The nozzle 34 is a rectangular parallelepiped extending in the width direction (left-right direction) of the web W, and a hot air outlet is provided in the form of a slit on the lower surface of the nozzle 34. A plurality of transport rolls 36 are provided at predetermined intervals below the transport path, and the web W is transported forward by supporting it on the upper peripheral surface of the transport rolls 36. In addition, a blower and a heating device (not shown) are provided on the right wall of the heat treatment chamber 10-3, and air taken in from the outside is heated by the heating device and blown into the duct 32 by the blower, and the air is blown out as hot air from each nozzle 34 onto the upper surface of the web W, thereby heat-treating (drying) the web W. When the door 16 or the door 20 is opened, the nozzles 34 and the transport rolls 36 can be inspected or removed through the opening 14 or the opening 18.

[0019] (3) Structure of door 20 Next, the structure of the door 20 will be described with reference to FIGS.

[0020] Hinge parts 40 and 42 are provided on the top and bottom of the rear side of the approximately square door 20, and are connected to the rear edge of the opening 18. As a result, the door 20 opens and closes sideways with respect to the opening 18, centering on the hinge parts 40 and 42. The door 20 opens and closes to the right in Fig. 2, i.e., in the lower height direction, so that the door 20 is always subjected to a force in the opening direction due to gravity.

[0021] An air cylinder 44 is provided along the front-rear direction above the door 20 on the left side wall 12 of the heat treatment chamber 10. The base of a cylinder body 46 of this air cylinder 44 is fixed to the left side wall 12 by a wall connecting metal fitting 48. A rotating part is provided on this wall connecting metal fitting 48, and as shown in Figure 4, the tip of the cylinder body 46 is provided so as to be freely rotatable in the horizontal direction.

[0022] The tip of the rod 50 extending from the cylinder body 46 is rotatably fixed to the surface of the door 20 via a door connection fitting 52 provided near the hinge part 40 on the upper part of the surface of the door 20. When the door 20 is opened sideways, this door connection fitting 52 moves in the direction in which the rod 50 extends.

[0023] Stoppers 54, 54 for the door 20 are provided near the hinge portions 40 and 42 on the left side wall 12 of the heat treatment chamber 10. As shown in FIG. 4, the stoppers 54 are fixed in place when the door 20 is opened 90 degrees to prevent it from opening any further.

[0024] The door 20 is provided with a key (not shown), and when the door 20 is to be opened, the key is removed to open the door.

[0025] Next, an air system diagram of the air cylinder 44 will be described with reference to Figure 5. A piston 56 is provided inside the cylinder body 46 of the air cylinder 44, and a rod 50 protrudes from this piston 56. The inside of the cylinder body 46 is divided into two closed spaces by the piston 56, and the closed space on the side where the rod 50 is present is called the "first closed space 58," and the closed space on the opposite side where the rod 50 is not present is called the "second closed space 60."

[0026] One pipe (intake side) from a speed controller 62 is connected to the first closed space 58. The other pipe (exhaust side) of the speed controller 62 is open to the atmosphere. A pipe from a silencer 68 is connected to the second closed space 60 of the cylinder body 46 for exhaust.

[0027] In FIG. 5, when the door 20 rotates in the opening direction, the piston 56 moves toward the first closed space 58. Since the heat treatment chamber 10-3 is inclined at an inclination angle θ3°, the door 20 opens suddenly due to its own weight, with the addition of the action of gravity. At this time, the air exhausted from the first closed space 58 along with the movement of the piston 56 is exhausted to the atmosphere through the speed controller 62. The exhaust amount per unit time exhausted from the first closed space 58 is adjusted by the speed controller 62, and if the exhaust amount per unit time is large, the piston 56 moves suddenly due to the action of gravity, and the door 20 opens quickly. Therefore, the exhaust amount per unit time of the speed controller 62 is adjusted so that the door 20 does not open due to its own weight even when gravity acts, and the worker can open the door 20 by pulling it with a predetermined pulling force without risking the worker. The "predetermined pulling force" means the same pulling force as when an operator pulls the door 20 to open it when the heat treatment chamber 10-3 is placed horizontally (tilt angle θ°=0°). Note that as the tilt angle θ3° increases, the effect of gravity increases, and it is necessary to reduce the amount of exhaust per unit time of the speed controller 62. Therefore, the amount of exhaust per unit time is adjusted in advance by conducting experiments on the opening and closing of the door 20.

[0028] When the door 20 rotates in the closing direction, the worker closes it against gravity, so that the door can be closed with an appropriate force. As the worker closes the door 20, the piston 56 moves toward the second closed space 60, and the air in the second closed space 60 is exhausted through the silencer 68.

[0029] The door 16 also has hinges 40 and 42 at its rear portion, and opens sideways on the side of the heat treatment chamber 10 where the height is lower. An air cylinder 44 is attached to the left side wall 12 of the heat treatment chamber 10 below the door 16, similar to the door 20. A speed controller 62 and a silencer 68 are connected to this air cylinder 44. The exhaust volume per unit time of the speed controller 62 is set to be the same as the exhaust volume per unit time of the speed controller 62 of the door 20. This allows the door 16 to not open under its own weight, but to open like the door 20 with a predetermined pulling force.

[0030] The doors 16, 20 of the other heat treatment chambers 10-1, 10-2, 10-4 to 10-10 have the same structure. The larger the inclination angle θ° of the 10 heat treatment chambers 10, the smaller the exhaust volume per unit time of the speed controller 62 is, so that no matter which door 16, 20 of the heat treatment chamber 10 is opened, the door 16, 20 does not open under its own weight and can be opened by a specified pulling force by an operator.

[0031] (4) Open / close state of door 20 Next, a case where an operator manually opens and closes the door 20 of the heat treatment chamber 10-3 will be described.

[0032] When opening the door 20 of the heat treatment chamber 10-3, an operator unlocks the door (not shown) and opens the door 20 sideways. At this time, the amount of air exhausted per unit time from the first closed space 58 of the air cylinder 44 is not small in accordance with the inclination angle θ3°, so that the movement of the piston 56 and the rod 50 becomes slow, and the door 20 does not open under its own weight, and can be opened to the position of the stopper 54 with a specified pulling force by the operator.

[0033] When the worker finishes a prescribed task such as replacing parts or cleaning inside the heat treatment chamber 10-3 and closes the door 20, the door 20 is closed against gravity, so it can be closed slowly. At this time, the rod 50 is stored in the cylinder body 46, and the air in the second closed space 60 is exhausted to the outside through the silencer 68. When the worker has completely closed the door 20, he or she locks it (not shown).

[0034] (5) Effects According to this embodiment, even if the heat treatment chamber 10 is installed at an angle on the arch-shaped installation stand 3, the doors 16, 20 do not suddenly open due to their own weight when they are opened, but open slowly with a predetermined pulling force by the worker, allowing the worker to work safely.

[0035] In particular, since the ten heat treatment chambers 10 are not installed on a linear inclined surface but on an arch-shaped mounting base 3, the inclination angle θ° of each heat treatment chamber 10 is different. However, since the exhaust volume per unit time of the speed controller 62 of each of the ten heat treatment chambers 10 is adjusted to match the inclination angle θ°, even if the door 16, 20 of any of the heat treatment chambers 10 with a different inclination angle θ° is opened, the door 16, 20 will not open under its own weight, but will open with a predetermined pulling force.

[0036] Furthermore, when the doors 16, 20 are closed, they do not close suddenly because they close against gravity.

[0037] (6) Example of changes In the above embodiment, a plurality of nozzles 34 are provided above the transport path of the web W inside the heat treatment chamber 10, and a plurality of transport rolls 36 are provided below the transport path, but this is not limiting. A plurality of upper nozzles may be provided at predetermined intervals above the transport path in the heat treatment chamber 10 along the transport path, and a plurality of lower nozzles may be provided at predetermined intervals below the transport path and in a staggered arrangement with the upper nozzles. The web W may then be dried by running in a floating state between the upper nozzles and the lower nozzles.

[0038] In the above embodiment, the exhaust side of the speed controller 62 is open to atmospheric pressure, but a regulator may be connected instead.

[0039] In the above embodiment, the speed controller 62 is provided to adjust the amount of exhaust per unit time of the first closed space 58 of the air cylinder 44, but a device for adjusting the amount of exhaust may be provided other than this.

[0040] In addition, in the above embodiment, multiple heat treatment chambers 10 are provided on the arch-shaped installation stand 3, but this is not limited to this, and the heat treatment apparatus 1 may be one in which one or multiple heat treatment chambers 10 are provided on an installation stand that only has an upward direction or an installation stand that only has a downward direction.

[0041] Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the scope of the invention and its equivalents described in the claims. [Explanation of symbols]

[0042] REFERENCE SIGNS LIST 1 heat treatment apparatus, 2 base, 3 installation stand, 10 heat treatment chamber, 12 left side wall, 18 opening, 20 door, 32 duct, 34 nozzle, 36 transport roll, 40 hinge portion, 42 hinge portion, 44 air cylinder, 46 cylinder body, 50 rod, 56 piston, 58 first closed space, 60 second closed space, 62 speed controller

Claims

1. A heat treatment chamber having thermal insulation properties; a nozzle for blowing hot air onto the web traveling in a forward and backward direction inside the heat treatment chamber; A door provided on a side wall of the heat treatment chamber; having The heat treatment chamber is inclined at an inclination angle θ° (0°<θ°45°) in the front-rear direction with respect to a horizontal plane, The door can be opened and closed by opening laterally from a higher side to a lower side of the inclined heat treatment chamber, A base of a cylinder body of an air cylinder is connected to the side wall above or below the door, The door is connected to a tip of a rod extending from the cylinder body, and the more the door opens, the more the rod extends from the cylinder body; a displacement control device is connected to the closed space on the rod side within the cylinder body; The amount of exhaust gas per unit time from the closed space by the exhaust gas amount control device is reduced as the inclination angle θ° increases. A web heat treatment apparatus comprising:

2. the displacement control device is a speed controller, One end of the speed controller is connected to the closed space on the rod side in the air cylinder. The web heat treatment device according to claim 1.

3. The other end of the speed controller is open to atmospheric pressure. The web heat treatment device according to claim 2.

4. A plurality of the connected heat treatment chambers are installed on an arch-shaped setting stand. The web heat treatment device according to claim 1.

5. A plurality of nozzles are provided at predetermined intervals above a transport path of the web in the front-rear direction inside the heat treatment chamber, Conveyor rolls for conveying the web are provided at predetermined intervals below the conveying path. The web heat treatment device according to claim 1.

6. A plurality of upper nozzles are provided at predetermined intervals above a transport path of the web in the front-rear direction inside the heat treatment chamber, A plurality of lower nozzles are provided below the transport path at predetermined intervals and in a staggered arrangement with the upper nozzles. The web heat treatment device according to claim 1.

7. The exhaust amount per unit time of the exhaust amount adjustment device is adjusted so that the door does not open by its own weight and can be opened with the same pulling force as when the door is pulled to open when the heat treatment chamber is placed horizontally. The web heat treatment device according to claim 1.

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