WO2016170674A1

WO2016170674A1 - Method and device for cutting fiber aggregate, vacuum insulation material, and refrigerator

Info

Publication number: WO2016170674A1
Application number: PCT/JP2015/062497
Authority: WO
Inventors: 洋輔藤森; 毅浩林; 犬塚　隆之; 一正藤村; 貴祥向山; 尚平安孫子; 浩明高井
Original assignee: 三菱電機株式会社
Priority date: 2015-04-24
Filing date: 2015-04-24
Publication date: 2016-10-27
Also published as: CN205521608U; JP6497436B2; JPWO2016170674A1

Abstract

Provided is a device for cutting a fiber aggregate, the device comprising: a rotary blade; a support section having a pair of flat support surfaces that are provided at a predetermined interval and support the fiber aggregate from below, the fiber aggregate being sheet-shaped and being a material to be cut ; and a surface-pressing section that is located above the support section and has a pair of surface-pressing surfaces that are provided at substantially the same interval as the predetermined interval and press against the surface of the fiber aggregate from above, the surface-pressing section pressing against the fiber aggregate in a state of straddling a gap constituted of the predetermined interval, and the gap being moved while the rotary blade is being rotated to cut the fiber aggregate, wherein: an upper corner section of the sheet-shaped fiber aggregate, having been cut by the rotary blade, is pressed down on.

Description

Cutting method of fiber assembly, cutting device, vacuum heat insulating material, and refrigerator

The present invention relates to a fiber assembly cutting method, a cutting device, a vacuum heat insulating material using the fiber assembly cut by these as a core material, and a refrigerator including the vacuum heat insulating material.

Conventionally, vacuum heat insulating materials have been used for heat insulating boxes such as refrigerators. A vacuum insulation material includes a core material made of a fiber assembly made of inorganic fibers such as glass fibers and ceramic fibers in an outer packaging material such as a plastic laminate film having a gas barrier layer, and maintains an internal vacuum level of several Pascals or less. It is composed of leaning. Generally, in order to obtain a core material having a size suitable for a vacuum heat insulating material, it is necessary to cut a fiber assembly provided in a long length into a desired size.

For example, Patent Document 1 discloses a method in which when a cut object such as a laminate sheet or a board is cut, the cut object is pressed from above and below by a caulking plate having protrusions formed on the edge portion and cut with a rotary blade. Has been. Further, Patent Document 2 includes a pair of rotary blades composed of an upper blade and a lower blade in an automatic wallpaper pasting machine, and the wallpaper is applied in a state where the side surface of the lower blade is pressed against the side surface of the upper blade with a certain force. A method of cutting is disclosed.

JP 2011-20201 A JP 2001-179150 A

When trying to cut the fiber aggregate of inorganic material by the cutting method disclosed in Patent Document 1, the protrusion provided on the rotary blade side of the caulking plate is pressed against the surface of the fiber aggregate at the time of cutting. A portion near the rotary blade of the aggregate is deformed. Moreover, when trying to cut the fiber assembly of the inorganic material by the apparatus disclosed in Patent Document 2, the fiber assembly is sandwiched between the side surface of the lower blade and the side surface of the upper blade at the time of cutting. The vicinity of the rotary blade is deformed. When cutting with deformation, there is a problem that the cut surface does not become vertical, and the length of the burr generated at the cut portion, that is, the fiber protruding from the surface of the fiber assembly is broken at the time of cutting.

When manufacturing a vacuum heat insulating material, if a fiber assembly having a long burr at the cut location is housed in an outer packaging material as a core material, the problem is that the vacuum is deteriorated due to the burr biting into the seal part of the vacuum heat insulating material. There is also. Moreover, even if the burr generated at the cut portion does not reach the sealing portion of the vacuum heat insulating material, if there is a burr at a location where the upper and lower outer packaging materials to be sealed contact each other, the burr is likely to stick into the outer packaging material. Therefore, there is also a problem that the degree of vacuum deteriorates.

The present invention has been made to solve the above-described problems. A fiber assembly cutting device, a cutting method, and the like that can reduce the length of burrs generated on the surface of the fiber assembly by cutting. It is providing a refrigerator provided with the vacuum heat insulating material using the core material which consists of a fiber assembly cut | disconnected by the apparatus or the method.

The fiber assembly cutting device according to the present invention includes a rotary blade, a support portion having a pair of support planes that are provided at predetermined intervals and support a sheet-like fiber assembly that is an object to be cut from below. A surface pressing portion that is located above the support portion and is provided at substantially the same interval as the predetermined interval, and has a pair of surface pressing surfaces that press the surface of the fiber assembly from above, and A fiber assembly cutting device that presses the fiber assembly with the surface pressing portion in a state of straddling the gap having the predetermined interval, and moves the gap while rotating the rotary blade to cut the fiber assembly. And a corner pressing portion that presses the upper corner of the sheet-like fiber assembly cut by the rotary blade.

The fiber assembly cutting device according to the present invention includes a rotary blade, a support portion having a pair of support planes that are provided at predetermined intervals and support a sheet-like fiber assembly that is an object to be cut from below. A surface pressing portion that is located above the support portion and is provided at substantially the same interval as the predetermined interval, and has a pair of surface pressing surfaces that press the surface of the fiber assembly from above, and A fiber assembly cutting device that presses the fiber assembly with the surface pressing portion in a state of straddling the gap having the predetermined interval, and moves the gap while rotating the rotary blade to cut the fiber assembly. An upper rotary blade that moves along the gap while cutting and cuts the fiber assembly is provided.

The fiber assembly cutting method according to the present invention includes a placing step of placing a sheet-like fiber assembly that is an object to be cut on a support base having a support plane having a gap; A pressing step in which the fiber assembly is pressed from above by a pressing part having a pressing surface having a gap having the same width as the gap of the supporting plane so that the gap of the supporting plane and the gap of the pressing part overlap each other. And a cutting step of cutting the fiber aggregate by moving along the gap while rotating the rotary blade, and a cutting method of the fiber aggregate, the sheet-like shape being cut by the rotary blade It includes a transporting step for transporting the fiber assembly placed on a conveyor, and a corner pressing step for pressing the upper corner of the cut fiber assembly.

The vacuum heat insulating material according to the present invention includes a core material made of a fiber assembly obtained by a cutting device or a cutting method of the fiber assembly, and an outer packaging material that wraps the core material and maintains the inside at a predetermined degree of vacuum. And comprising. The refrigerator according to the present invention includes the vacuum heat insulating material.

According to the fiber assembly cutting apparatus and method of the present invention, the length of burrs generated on the surface of the fiber assembly by cutting can be reduced. Therefore, even when the fiber assembly is enclosed in the outer packaging material as the core material of the vacuum heat insulating material, the outer packaging material is not damaged and no gap is formed in the seal portion, so the vacuum degree of the vacuum heat insulating material should be kept high. Has the effect of being able to. Moreover, since the refrigerator of this invention is equipped with the vacuum heat insulating material with which the degree of vacuum was kept high as a heat insulating material, there exists an effect that cold-retaining capability can be maintained and power saving can be achieved.

It is a top view of the cutting device in Embodiment 1 of this invention. It is a side view of the cutting device of FIG. It is a front view of the cutting device of FIG. It is a perspective view of a cutting device provided with a corner pressing jig as a corner pressing portion. It is a perspective view of a cutting device provided with a corner presser roller as a corner presser. It is a side view of the cutting device in Embodiment 2 of this invention. It is a front view of the cutting device of FIG. It is sectional drawing which shows typically the heat insulation box in Embodiment 3 of this invention.

Embodiment 1 FIG.
FIG. 1 is a plan view showing a schematic configuration of the cutting device 1 of the present embodiment. FIG. 2 is a side view of the cutting device 1. FIG. 3 is a front view of the cutting device 1. FIG. 4 is a perspective view of a part of the cutting device 1 (referred to as a burr suppressing device 40) when the corner pressing jig 10 is used as the corner pressing portion. The cutting device 1 is a device that cuts a long sheet-like fiber assembly 12 to a size suitable for enclosing it in an outer packaging material of a vacuum heat insulating material as a core material.

The support unit 2 has a support plane 2a that supports the fiber assembly 12 conveyed by the feed conveyor 8 from below. The support portion 2 is provided with a gap D1 through which the rotary blade 4 can pass when the fiber assembly 12 is cut. The support part 2 consists of a pair of support plates 2b and 2c. The height position of the support plane 2a of the support plate 2b and the height position of the support plane 2a of the support plate 2c are the same. Each of the support plate 2b and the support plate 2c is a quadrangular plate in plan view, and is arranged so that one side of the support plate 2a and one side of the support plate 2b face each other with a predetermined distance D1.

The surface pressing portion 3 is provided above the support portion 2, and is lowered toward the support portion 2 by the press portion driving mechanism 7 before the fiber assembly 12 is cut, and is supported on the support portion 2. It has a surface pressing surface 3a for pressing the body 12 from above. The support 2 is provided with a gap D1 through which the rotary blade 4 can pass when the fiber assembly 12 is cut. The gap is provided at a position corresponding to the gap D1 of the support portion 2. Further, the size of the distance D1 between the surface pressing portions 3 is the same as the size of the distance D1 between the support portions 2. The surface pressing portion 3 includes a pair of surface pressing plates 3b and 3c. The surface pressing portion 3 is moved up and down by the pressing portion driving mechanism 7 so that the height position of the surface pressing surface 3a of the surface pressing plate 3b and the height position of the surface pressing surface 3a of the surface pressing plate 3b become the same. Each of the surface pressing plate 3b and the surface pressing plate 3c is a square plate in plan view, and one side of the surface pressing plate 3b and one side of the surface pressing plate 3c are arranged to face each other with a predetermined distance D1. .

Hereinafter, the gap of the interval D1 through which the rotary blade 4 passes when the fiber assembly 12 is cut is referred to as a passage 20. The support plate 2b and the support plate 2c are disposed on both sides with the passage 20 interposed therebetween. The surface pressing plate 3b and the surface pressing plate 3c are disposed on both sides of the passage 20 therebetween. The surface of the surface pressing surface 3a from the end portion 3d on the passing path 20 side to the predetermined distance D3 is parallel to the support plane 2a. The surface of the surface pressing surface 3 a that is a predetermined distance D 3 or more away from the end portion 3 d on the passing path 20 side is inclined in the direction opposite to the pressing direction 70. The predetermined distance D3 is, for example, a distance of about ½ of the width of the surface pressing surface 3a from the end 3d on the passing path 20 side to the end on the opposite side. The surface of the surface pressing surface 3a that is a predetermined distance D3 or more away from the end 3d on the passage 20 side is a flat surface or a curved surface.

The rotary blade 4 cuts the fiber assembly 12 supported by the support portion 2 and pressed by the surface pressing portion 3 while moving along the passage 20. At the time of cutting, the rotary blade drive mechanism 5 rotates the rotary blade 4 about the rotary shaft 4 a, and the rotary blade moving mechanism 6 horizontally moves the rotary blade 4 along the passage 20. The presser portion drive mechanism 7 is engaged with a linear actuator (not shown) such as an air cylinder or a hydraulic cylinder, and is movable in the presser direction 70. The feed conveyor 8 is a first transport mechanism that transports the sheet-like fiber aggregate 12 in order to feed it in the direction of the rotary blade 4. The payout conveyor 9 is a second transport mechanism that transports the cut fiber assembly 12 and transfers it from the cutting device 1 in order to move to a subsequent process.

The corner pressing jig 10 which is a corner pressing portion is provided at a position higher than the conveying surface of the delivery conveyor 9 and is an upper corner of the cut sheet-like fiber assembly 12 placed on the delivery conveyor 9. A pair of corner pressing surfaces 10a for pressing the portion. The corner pressing jig 10 includes a pair of pressing members 10b and 10c. The pressing member 10b and the pressing member 10c are arranged on both sides with the conveyance path 9b of the payout conveyor 9 in between. Each corner pressing surface 10 a of the pressing members 10 b and 10 c is a flat surface that is inclined with respect to the transport surface 9 a and extends along the transport direction 50. The corner pressing surface 10a of the pressing member 10c is inclined in a direction intersecting with the corner pressing surface 10a of the pressing member 10b. The pressing jig driving mechanism 11 moves the corner pressing jig 10 in a direction in which the corners of the cut fiber assembly 12 placed on the conveyor 9 are pressed. That is, the presser jig driving mechanism 11 brings the presser member 10b and the corner pressing surfaces 10a of the presser member 10c, which are respectively arranged on both sides of the transport path 9b of the delivery conveyor 9, from each side of the transport path 9b. Move in the direction. Thereby, each corner | angular part pressing surface 10a of the pressing member 10b and the pressing member 10c is pressed against the upper side corner | angular part of the fiber assembly 12 mounted in the conveyance surface 9a of the delivery conveyor 9 from both sides. The inclination angle of the corner pressing surface 10a with respect to the conveying surface 9a is preferably 30 to 60 degrees. With such an angle, it has been confirmed that the effect of reducing the length of the fiber protruding from the surface of the fiber assembly by breaking at the time of burr, that is, cutting is great. In the conventional cutting method, burrs having a length of about 5 mm to 15 mm are generated. However, according to the cutting device 1 of the present embodiment, the length of the burrs can be made less than 5 mm.

The fiber assembly 12 is cut once by the cutting device 1 (hereinafter referred to as a first cutting step) and then cut in the first cutting step in order to obtain a size suitable as a core material of a vacuum heat insulating material. Can also be cut in a vertical direction (hereinafter referred to as a second cutting step). The fiber assembly 12 cut in the first cutting step and discharged by the payout conveyor 9 is placed on the feed conveyor 8 of the same cutting device 1 as that in the first cutting step or another cutting device 1 prepared separately. Placed in a different direction. And the fiber assembly 12 is cut | disconnected in a perpendicular | vertical direction with respect to the cutting direction in a 1st cutting process in a 2nd cutting process. Referring to FIG. 4, a first cut surface 12a formed by cutting in the first cutting step and a second cut surface 12b formed by cutting in the second cutting step are shown. FIG. 4 shows the burr suppressing device 40 when the burr protruding outward from the upper corner of each of the first cut surface 12a and the cut surface 12c facing the first cut surface 12a is pressed by the corner pressing jig 10. Yes. The cut surface 12c is a cut surface formed when the fiber assembly 12 is cut off from the immediately preceding fiber assembly (not shown). The cut surface 12d is a cut surface that faces the second cut surface 12b, and is a cut surface that is formed when the fiber assembly 12 is cut off from the immediately preceding fiber assembly (not shown).

Hereinafter, the operation of the cutting device 1 will be described. First, the first cutting process will be described. The long fiber assembly 12 is sent out onto the support plane 2 a of the support portion 2 by the feed conveyor 8. The fed fiber assembly 12 is detected by a sensor (not shown) and stops at a predetermined position on the support plane 2a of the support portion 2. The fiber assembly 12 is placed on the support plane 2 a of the support portion 2 in a state of straddling the passage 20. At this time, a part of the fiber assembly 12 may be placed on the transport surface 9 a of the delivery conveyor 9.

Next, the surface pressing portion 3 is lowered toward the support portion 2 by the pressing portion driving mechanism 7, and the fiber assembly 12 is pressed from above by the surface pressing surface 3 a of the surface pressing portion 3. The lowering operation of the presser part drive mechanism 7 is stopped by position control by a stopper or a limiter (not shown) or load control by a load cell (not shown).

It is desirable that the presser portion drive mechanism 7 is a mechanism that can apply a pressure of 0.01 [MPa] or more to the fiber assembly 12. If the pressure is 0.01 [MPa] or more, the fiber assembly 12 can be reliably cut by reducing the thickness at the time of cutting. For example, when the fiber assembly 12 has a thickness of 300 mm before compression and a basis weight of 1400 g / m 2, if the fiber assembly 12 is compressed with a pressure of 0.01 [Mpa], the thickness of the fiber assembly 12 is 60 mm or less. be able to. It is more desirable that the presser portion drive mechanism 7 compresses the fiber assembly 12 with a pressure of 0.02 [MPa] or more. If the pressure is 0.02 [MPa] or more, the thickness of the fiber assembly 12 at the time of cutting can be made sufficiently thin. Therefore, an inexpensive rotary blade with a small diameter in the market is used as the rotary blade 4. Therefore, the cost can be reduced. As a rotary blade distributed in the market, a blade having a diameter of 250 mm and a cuttable thickness (blade width) of 90 mm is known.

Further, since the surface in the vicinity of the cut portion in the surface pressing surface 3 a is parallel to the support plane 2 a, the fiber assembly 12 is sandwiched between the support portion 2 and the surface pressing portion 3. Thereby, the position shift by the contact with the fiber assembly 12 and the rotary blade 4 at the time of a cutting | disconnection can be prevented. On the other hand, the surface of the surface pressing surface 3 a that is a predetermined distance D 3 or more away from the end 3 d on the passage way 20 side is inclined in the direction opposite to the pressing direction 70. Thereby, the deformation of the surface of the fiber assembly 12 at the boundary between the portion pressed by the surface pressing surface 3a and the portion not pressed can be suppressed, and the fibers on the surface of the fiber assembly 12 can be prevented from being cut.

The fiber assembly 12 is placed on the support plane 2 a across the passage 20 and is pressed from above by the surface pressing portion 3. In this state, the rotary blade 4 is moved along the passage 20 by the rotary blade moving mechanism 6 while being rotated by the rotary blade drive mechanism 5. With this operation, the fiber assembly 12 is cut. The distance D2 from the end 3d on the passing path 20 side of the support portion 2 and the surface pressing portion 3 to the rotary blade 4 (hereinafter referred to as the blade-side distance D2) is in the range of 0.5 mm to 1.5 mm. Is desirable. The rotary blade 4 moves while maintaining a certain distance from the start of cutting to the end of cutting within the range. If the distance D2 between the blade sides is less than 0.5 mm, the rotating blade 4 may come into contact with the support portion 2 and the surface pressing portion 3 due to the occurrence of blade blurring when the rotating blade is rotated. Moreover, when the distance D2 between the blade sides exceeds 1.5 mm, the length of the burr generated at the cut portion of the fiber assembly tends to be long. In addition, the burr | flash in this specification means the fiber which protrude | jumped out of the fiber assembly 12 from the cut surface of the fiber assembly 12. FIG.

The peripheral speed of the outer peripheral portion of the rotary blade 4, that is, the rotational speed, is preferably faster than the moving speed of the rotary blade moving mechanism 6. In this way, cutting of the fiber assembly 12 by the rotary blade 4 can be prevented from becoming a so-called press cutting, and the amount of threading of the fiber assembly and the generation of burrs at the cut portion can be reduced. Further, it is preferable to rotate the rotary blade 4 in a direction 80 to be rounded up with respect to the moving direction 60. With this rotation direction, the tip of the rotary blade 4 moves upward from the bottom surface at the bottom corner 12a on the cut end side of the fiber assembly 12. Thereby, the burr generated at the bottom corner 12a is entangled with the side surface of the cut portion of the fiber assembly 12 while being pulled upward, so that no burr is generated at the bottom corner 12a.

After the fiber assembly 12 is cut, the rotary blade 4 is returned to the position before starting the cutting operation. The surface pressing portion 3 is raised by the pressing portion driving mechanism 7 and the pressing of the fiber assembly 12 is released. Thus, the first cutting process is completed. The cut fiber assembly 12 is conveyed by the delivery conveyor 9 and delivered to the second cutting step. The discharged fiber assembly 12 is placed on the feed conveyor 8 of the same cutting device 1 as in the first cutting step, or another cutting device 1 prepared separately, with the direction thereof being changed by 90 degrees. In the second cutting process, the fiber assembly 12 is cut in a direction perpendicular to the cutting direction in the first cutting process. The cutting method in the second cutting step is the same as the cutting method in the first cutting step.

The fiber assembly 12 cut by the second cutting step is conveyed by the payout conveyor 9. The conveying operation by the payout conveyor 9 is stopped when the fiber assembly 12 is detected by a sensor (not shown) provided at a predetermined position. Next, the corner pressing jig 10 is pressed against the corner of the fiber assembly 12 placed on the delivery conveyor 9. With this operation, burrs generated at the upper corners of the cut portion of the fiber assembly 12 by the cutting operation by the rotary blade 4 are pushed into the fiber assembly 12. Thereby, the magnitude | size of the burr | flash in each upper corner | angular part of the 1st cut surface 12a of the fiber assembly 12 and the cut surface 12c facing this can be made small. The length of the corner pressing surface 10a of the corner pressing jig 10 in the transport direction 50 is preferably longer than the length of the fiber assembly 12 in the transport direction 50. According to such a configuration, the entire upper corner portion of the fiber assembly 12 can be pressed by pressing once. In particular, since the upper corners of two cut portions of the fiber assembly 12 where burrs can be generated by cutting can be pressed simultaneously, the efficiency is good. By pushing the burrs into the fiber assembly 12, the size of the burrs, that is, the protruding length of the fibers from the cut surface can be reduced to 5 mm or less. In addition, the size of the burr is about 15 mm before the burr presser.

Thereafter, burrs generated at the upper corners of the second cut surface 12b and the cut surface 12d facing the second cut surface 12b can be similarly pressed by the corner pressing jig 10. For example, the corner pressing jig 10 is rotated 90 degrees so that the pressing member 10b is positioned above the upper corner of the second cut surface 12b and the pressing member 10c is positioned above the upper corner of the cutting surface 12d. These upper corners can be pressed in the same manner. Further, the upper corner portion can be similarly pressed using the corner pressing jig 10 provided separately in a state where the fiber assembly 12 is conveyed by the delivery conveyor 9 and placed on the mounting table (not shown). . By repeating the above series of operations, the fiber assembly 12 is continuously cut and burred.

As described above, in the cutting device 1 of the present embodiment, the fiber assembly 12 is sandwiched between the support portion 2 and the surface pressing portion 3 on both sides of the passage 20 of the rotary blade 4 before cutting until completion of cutting. Fix it. According to such a configuration, since the fiber assembly 12 is sandwiched and fixed between the support portion 2 and the surface pressing portion 3 at the time of cutting, the positional deviation of the fiber assembly 12 at the time of cutting can be suppressed. In addition, since the thickness of the fiber assembly 12 at the time of cutting can be sufficiently reduced, the fiber assembly 12 can be reliably cut. Further, by sufficiently reducing the thickness, even when an inexpensive rotary blade with a small diameter in the market is used as the rotary blade 4, it can be surely cut, so the cost can be reduced. Further, the surface of the surface pressing surface 3a of the surface pressing portion 3 that presses the fiber assembly 12 from above at the time of cutting is a side opposite to the pressing direction 70 from the end portion 3d on the passing path 20 side by a predetermined distance D3 or more. Inclined in the direction of. According to this structure, the level | step difference which arises between the part currently pressed by the surface pressing part 3 and the part not pressed of the fiber assembly 12 becomes small. Therefore, the surface of the fiber assembly 12 is not easily deformed, and the fiber is hardly cut at the presser part. Further, since the corner pressing jig 10 is pressed against the corner of the cut fiber assembly 12 placed on the delivery conveyor 9, the upper surface of the cut portion of the fiber assembly 12 is cut by the cutting operation by the rotary blade 4. The burrs generated at the corners can be pushed into the fiber assembly 12. Thereby, the magnitude | size of the burr | flash which can arise in the corner | angular part of the fiber assembly 12 after a cutting | disconnection can be made small.

Thus, according to the cutting device 1 of the present embodiment, in the step of cutting the long fiber assembly 12 to obtain the fiber assembly 12 having a desired size, the size of the burr that can be generated at the cut portion is reduced. can do. By using the fiber assembly 12 cut by the cutting device 1, a highly reliable core material for a vacuum heat insulating material can be obtained. The above-described example is an example in which a pair of corner pressing jigs 10 are provided, but a configuration including only one corner pressing jig 10 may be employed. In the case of pressing with a pair of corner pressing jigs 10, it is possible to prevent the fiber assembly 12 from moving in the pressing direction on the delivery conveyor 9 during pressing.

FIG. 5 is a partial perspective view of the cutting device 1 during the burr pressing process when the corner pressing roller 13 is used as the corner pressing portion.

The corner pressing roller 13 is rotatable around a rotating shaft 13 d and is provided above the payout conveyor 9. The corner pressing roller 13 has a corner pressing surface 13 a formed of a columnar curved surface that presses the upper corner of the cut fiber assembly 12 placed on the delivery conveyor 9. The corner pressing roller 13 includes a pair of roller portions 13b and 13c. The roller parts 13b and 13c are arrange | positioned on both sides on both sides of the conveyance path 9b of the delivery conveyor 9. As shown in FIG. The rotation shaft 13d of each of the roller portion 13b and the roller portion 13c is inclined with respect to the transport surface 9a. The rotation shaft 13d of the roller portion 13c is inclined in a direction intersecting with the rotation shaft 13d of the roller portion 13b on a virtual plane perpendicular to the transport surface 9a. With this arrangement, the two upper corners of the cut fiber assembly 12 being conveyed by the payout conveyor 9 can be pressed simultaneously.

Hereinafter, the operation of the cutting device 1 when the corner pressing roller 13 is used as the corner pressing portion will be described. Since the operation up to the cutting of the fiber assembly 12 is the same as in the above embodiment, the description thereof is omitted. The pressing jig driving mechanism 11 moves the corner pressing roller 13 in a direction to press the upper corner of the cut fiber assembly 12 placed on the delivery conveyor 9. Specifically, the holding jig driving mechanism 11 moves each of the roller unit 13b and the roller unit 13c arranged on both sides of the conveyance path 9b of the discharge conveyor 9 in a direction approaching each other from both sides of the conveyance path 9b. . The fiber assembly 12 continues to move along the transport direction 50 on the delivery conveyor 9. From the time when the upper corner of the fiber assembly 12 reaches the arrangement position of the corner pressing roller 13, each corner pressing surface 13 a of the pressing member 10 b and the pressing member 10 c is obliquely above the upper corner of the fiber assembly 12. It is pressed from. The corner pressing roller 13 pushes the burrs generated at the corners into the fiber assembly 12 while rotating due to friction generated by contact with the corners.

According to such a configuration, the burr can be pressed while conveying the cut fiber assembly 12 without stopping the delivery conveyor 9. Thereby, the cutting time of the fiber assembly 12 can be shortened. Further, by forming the corner pressing portion 13 with a roller structure, the burrs at the corners of the fiber assembly 12 being conveyed can be pressed without being caught on the corner pressing portion 13. The above example is an example in which a pair of corner pressing rollers 13 are provided, but a configuration having only one corner pressing roller 13 may be employed. In addition, when pressing with the pair of corner pressing rollers 13, it is possible to prevent the fiber assembly 12 from moving in the pressing direction on the delivery conveyor 9 during pressing.

Embodiment 2. FIG.
FIG. 6 is a side view of the cutting device 1 in the present embodiment. FIG. 7 is a front view of the cutting device 1 of FIG. The cutting device 1 of this embodiment further includes an upper rotary blade 14, an upper rotary blade drive mechanism 15, and an upper rotary blade moving mechanism 16. In the following, different parts from the first embodiment will be mainly described.

The upper rotary blade 14 cuts the fiber assembly 12 supported by the support unit 2 and pressed by the surface pressing unit 3 while moving along the passage 20. At the time of cutting, the upper rotary blade driving mechanism 15 rotates the upper rotary blade 14 and the upper rotary blade moving mechanism 16 moves the upper rotary blade 14.

The rotation surface of the rotary blade 4 and the rotation surface of the upper rotary blade 14 are located on the same plane. The rotary shaft 4a of the rotary blade 4 and the rotary shaft 14a of the upper rotary blade 14 are installed at positions separated by a predetermined distance D4 in the moving direction 60. The height position of the upper end portion 4 b of the rotary blade 4 is higher than the height position of the lower end portion 14 b of the upper rotary blade 14. According to such an arrangement, the fiber assembly 12 is cut from both the upper and lower directions, but the fiber assembly 12 is completely cut without using a single cutting surface for the fiber assembly 12 and contacting the rotary blade 4 with the upper rotary blade 14. it can.

The height position of the upper end portion 4b of the rotary blade 4 and the height position of the lower end portion 14b of the upper rotary blade 14 are the height of the surface pressing surface 3a of the surface pressing portion 3 when the fiber assembly 12 is pressed. It is located between the position and the height position of the support plane 2 a of the support portion 2. The rotary blade 4 rotates in the direction of cutting up the fiber assembly 12 with respect to the moving direction 60, and the upper rotary blade 14 rotates in the direction of cutting down the fiber assembly 12 with respect to the moving direction 60. According to such a configuration, the cutting depth of each of the rotary blade 4 and the upper rotary blade 14 is shallower than the thickness of the pressed fiber assembly 12. At this depth of cut, the rotary blade 4 positioned on the lower side rotates in the direction of cutting up, and the upper rotary blade 14 positioned on the upper side rotates in the direction of cutting down, so that the fibers in the vicinity of the cut surface of the fiber assembly 12 are the core material. It is pushed or pulled toward the inside. Thereby, the fiber of the corner | angular part of the fiber assembly 12 can be prevented from jumping out, and the generation | occurrence | production of the burr | flash to the upper and lower corner | angular parts can be suppressed.

Hereinafter, the operation of the cutting apparatus 1 according to the second embodiment will be described. The process up to the step of pressing the fiber assembly 12 by the surface pressing portion 3 is the same as that of the first embodiment. While the fiber assembly 12 is pressed by the surface pressing portion 3, the rotary blade 4 is moved along the passage 20 by the rotary blade moving mechanism 6 while being rotated by the rotary blade drive mechanism 5. At the same time, the upper rotary blade 14 is moved along the passage 20 by the upper rotary blade moving mechanism 16 while being rotated by the upper rotary blade drive mechanism 15. With this operation, the fiber assembly 12 is cut. The cut fiber assembly 12 is transported to the subsequent process by the delivery conveyor 9 without going through the burr pressing process of the first embodiment.

As described above, the cutting device 1 of the present embodiment includes the rotary blade 4 and the upper rotary blade 14. The cutting depth of each of the rotary blade 4 and the upper rotary blade 14 is made shallower than the thickness of the fiber assembly 12 after compression, the rotational direction of the rotary blade 4 is set as the up direction, and the rotational direction of the upper rotary blade 14 is set as the down direction. Yes. Thereby, since the fiber of the side surface vicinity of the fiber assembly 12 is brought inside, the generation | occurrence | production of the burr | flash to the upper surface side and bottom surface side of the cut location of the fiber assembly 12 can be suppressed. Since no burr is generated on the upper surface side, it is not necessary to provide the burr pressing process of the first embodiment. Therefore, the time required for cutting can be shortened, and the fiber assembly 12 without burr can be obtained.

Embodiment 3 FIG.
FIG. 8 is a cross-sectional view of the heat insulation box 30 of the present embodiment. Hereinafter, the case where the heat insulation box 30 is a refrigerator is demonstrated. The refrigerator 30 includes an outer box 31, an inner box 32 disposed inside the outer box 31, a vacuum heat insulating material 18 and a polyurethane foam 33 disposed between the outer box 31 and the inner box 32, and an inner box 32. And a refrigeration unit (not shown) for supplying cold heat. Each of the outer box 31 and the inner box 32 is formed with an opening (not shown), and an opening / closing door (not shown) that can open and close the opening is provided.

The vacuum heat insulating material 18 wraps the core material 18a made of the fiber assembly cut by the cutting device 1 of

Embodiment

1 or 2 with an outer packaging material 18b such as a plastic laminate film having a gas barrier layer, and the internal vacuum degree is It is configured to be kept below several pascals. The position where the vacuum heat insulating material 18 is provided in the refrigerator 30 may be the entire range of the gap formed between the outer box 31 and the inner box 32, or may be a part of the gap. Moreover, the vacuum heat insulating material 18 may be arrange | positioned inside an opening-and-closing door.

Since no burr is generated in the core material 18a, the burr is not bitten into the seal portion 18c when the core material 18 is wrapped with the outer packaging material 18b, and the vacuum degree of the vacuum heat insulating material 18 can be prevented from deteriorating. Moreover, the cold insulation capacity of the refrigerator 30 can be maintained by applying the vacuum heat insulating material 18 maintained at a desired degree of vacuum to the refrigerator 30, which contributes to power saving. In addition, when the refrigerator 30 is used, it is dismantled and recycled at recycling centers in various places based on the Home Appliance Recycling Law. At this time, when the core material of the vacuum heat insulating material of the refrigerator is an inorganic powder as in the conventional case, when the crushing process is performed, the powder is scattered, and the crushing process cannot be performed as it is in the box. It takes a lot of work to remove the vacuum insulation from the body. On the other hand, since the refrigerator 30 according to the present invention includes the vacuum heat insulating material 18 in which the core material 18a formed of the fiber assembly 12 is disposed, the crushing process is performed without removing the vacuum heat insulating material 18. And has the advantage of good recyclability.

In the above description, the case where the heat insulation box 30 is a refrigerator has been shown. However, the present invention is not limited to this, and the heat insulation box 30 may be a cooling device or a heating device such as a heat insulation box, a vehicle air conditioner, or a fueling device. Furthermore, instead of a box having a predetermined shape, a heat insulating bag (heat insulating container) having a deformable outer bag and inner bag may be used. In these cases, the heat insulating box may be provided with temperature adjusting means to adjust the temperature inside the inner box.

Although the support part 2 of the said

Embodiment

1 and 2 is an example which consists of the two support plates 2b and 2c, it is not restricted to this. For example, the support portion 2 may have a structure having a slit having a length equal to or longer than the distance that the width is the distance D1 and the rotary blade 4 is moved for cutting the fiber assembly 12. In the case of such a configuration, in addition to the effects in the above-described embodiment, there is also an effect that it is not necessary to match the lifting timing and the lifting distance of the two support plates 2b and 2c. Further, the support portion 2 may be a base instead of a plate. In this case, the same effect is obtained.

DESCRIPTION OF SYMBOLS 1 Cutting device 2 Support part 3 Surface pressing part 4 Rotary blade 5 Rotary blade drive mechanism 6 Rotary blade moving mechanism 7 Presser part drive mechanism 8 Feeding conveyor 9 Discharge conveyor 10 Corner part pressing jig 11 Corner part holding jig drive mechanism 12 Fiber Assembly 13 Corner pressing roller 14 Upper rotary blade 15 Upper rotary blade drive mechanism 16 Upper rotary blade moving mechanism 17 Distance between blade sides 18 Vacuum heat insulating material 30 Refrigerator 31 Outer box 32 Inner box 33 Urethane 34 Heat insulation wall 40 Burr suppression device

Claims

A rotating blade,
A support portion having a pair of support planes provided at a predetermined interval and supporting a sheet-like fiber assembly which is an object to be cut from below;
A surface pressing portion that is positioned above the support portion and provided at substantially the same interval as the predetermined interval, and having a pair of surface pressing surfaces that press the surface of the fiber assembly from above,
A fiber assembly cutting device that presses the fiber assembly with the surface pressing portion in a state of straddling the gap having the predetermined interval and moves the gap while rotating the rotary blade to cut the fiber assembly. Because
An apparatus for cutting a fiber assembly, comprising: a corner pressing portion that presses an upper corner of the sheet-shaped fiber assembly cut by the rotary blade.
The corner presser is
A first corner pressing jig having a plane inclined with respect to the support plane;
A pressing jig driving mechanism that moves the first corner pressing jig so that a plane of the first corner pressing jig faces one upper corner of the fiber assembly. The fiber assembly cutting device according to claim 1.
A second corner pressing jig having a plane inclined in a direction intersecting with the plane of the first corner pressing jig;
The presser jig driving mechanism includes the second corner presser so that a plane of the second corner presser jig faces an upper corner opposite to the one upper corner of the fiber assembly. The apparatus for cutting a fiber assembly according to claim 2, wherein the jig is moved.
The corner presser is
A first corner-pressing roller that has a cylindrical curved surface that is rotatable about a rotation axis and the rotation axis is inclined with respect to the support plane;
A pressing roller driving mechanism that moves the first corner pressing roller so that the cylindrical curved surface of the first corner pressing roller moves toward one upper corner of the fiber assembly. The apparatus for cutting a fiber assembly according to claim 1.
A second corner pressing roller having a cylindrical curved surface that is rotatable about a rotation axis and inclined in a direction in which the rotation axis intersects with the rotation axis of the first corner pressing roller;
The presser roller driving mechanism includes the second corner presser so that a cylindrical curved surface of the second corner presser roller faces an upper corner opposite to the one upper corner of the fiber assembly. The apparatus for cutting a fiber assembly according to claim 4, wherein the roller is moved.
The surface of the surface pressing surface in the region from the gap-side end to a predetermined distance is parallel to the support plane, and the surface in the region separated from the gap-side end by the predetermined distance or more is the surface pressing portion. The fiber assembly cutting device according to any one of claims 1 to 5, wherein the fiber assembly cutting device is inclined toward a side opposite to a pressing direction of the fiber assembly.
The fiber assembly cutting device according to any one of claims 1 to 6, wherein a distance from an end of the gap to the rotary blade is 0.5 mm to 1.5 mm.
The fiber assembly cutting device according to any one of claims 1 to 7, wherein a peripheral speed of the outer peripheral portion of the rotary blade is faster than a speed when the rotary blade passes through the gap. .
The apparatus for cutting a fiber assembly according to any one of claims 1 to 8, wherein a pressure when the fiber assembly is pressed by the surface pressing portion is 0.01 MPa or more.
A rotating blade,
A support portion having a pair of support planes provided at a predetermined interval and supporting a sheet-like fiber assembly which is an object to be cut from below;
A surface pressing portion that is positioned above the support portion and provided at substantially the same interval as the predetermined interval, and having a pair of surface pressing surfaces that press the surface of the fiber assembly from above,
A fiber assembly cutting device that presses the fiber assembly with the surface pressing portion in a state of straddling the gap having the predetermined interval and moves the gap while rotating the rotary blade to cut the fiber assembly. Because
An apparatus for cutting a fiber assembly, comprising an upper rotary blade that moves along the gap while rotating and cuts the fiber assembly.
The rotary surface of the rotary blade and the rotary surface of the upper rotary blade are located on substantially the same plane,
The rotary shaft of the rotary blade and the rotary shaft of the upper rotary blade are installed at positions separated by a predetermined distance in the moving direction of the rotary blade and the upper rotary blade,
The fiber assembly cutting device according to claim 10, wherein a height position of an upper end portion of the rotary blade is provided at a position higher than a height position of a lower end portion of the upper rotary blade.
The height position of the upper end portion of the rotary blade, and the height position of the lower end portion of the upper rotary blade are the height position of the press surface of the press portion when pressing the fiber assembly, It is located between the height position of the support plane of the support part,
The rotating blade rotates in a direction to cut up the fiber assembly with respect to its moving direction, and the upper rotating blade rotates in a direction to cut down the fiber assembly with respect to its moving direction. Item 12. The fiber assembly cutting device according to Item 11.
The fiber assembly according to any one of claims 1 to 12, wherein the corner pressing by the corner pressing portion is performed on a conveyor that conveys the cut sheet-like fiber assembly. Cutting device.
A placing step of placing a sheet-like fiber assembly that is an object to be cut on a support base having a support plane having a gap; and
The fiber assembly placed on the support base is separated from the gap between the support plane and the gap between the surface presser portions by a surface pressing portion having a surface pressing surface having a gap having the same width as the gap between the support planes. A pressing step for pressing from above so that the
A cutting step of cutting the fiber assembly by moving along the gap while rotating a rotary blade, and a cutting method of the fiber assembly,
And a corner pressing step for pressing the upper corner portion of the cut fiber assembly.
A core material comprising a fiber aggregate obtained by the fiber aggregate cutting device according to any one of claims 1 to 13, or a fiber aggregate obtained by the fiber aggregate cutting method according to claim 14. ,
A vacuum heat insulating material, comprising: an outer packaging material that wraps the core material and is maintained at a predetermined degree of vacuum.
A refrigerator comprising the vacuum heat insulating material according to claim 15.