JPWO2017169919A1 - Insulating material sorting apparatus and insulating material sorting method - Google Patents

Abstract

Provided are a heat insulating material sorting apparatus and a heat insulating material sorting method for sorting small pieces of heat insulating material for each material. The needle 3a provided on the rotating body 3 is pressed against the heat insulating material (the urethane foam material 8 and the glass wool 9) transported by the transport machine 2 and stabbed, and according to the ease of removal from the needle 3a. Sort out insulation. First, the glass wool 9 that is easy to come off from the needle 3a is removed from the heat-insulating material stuck in the needle 3a, but the foamed urethane 8 that is hard to come off is applied so that the heat-insulating material removed from the needle 3a is recovered as glass wool 9. Next, the heat insulating material remaining without coming out of the needle 3a is removed from the needle 3a as a urethane foam material 8 and collected.

Description

  The present invention relates to a heat insulating material sorting apparatus and a heat insulating material sorting method for sorting heat insulating materials used in a refrigerator for each material.

  Urethane foam is mainly used as a heat insulating material for refrigerators. This foamed urethane material is crushed and granulated and recycled to fuel and the like. In the process of taking out the urethane foam material from the refrigerator and recycling it to fuel, first, parts such as a compressor are removed from the refrigerator carried into the processing facility, and the remaining casing is crushed by a crusher, and the size is several cm to Small pieces to about a dozen centimeters. Small pieces such as metal, plastic, and urethane foam are discharged from the crusher, and light-weight items such as urethane foam are separated therefrom by wind power sorting. Heavy materials are further separated for each material such as iron, non-ferrous metal, and various plastics by various sorting devices such as magnetic sorting. The foamed urethane material is separated as a lightweight material by wind sorting, then finely crushed, and after removing the foaming agent such as cyclopentane, it is granulated and becomes urethane fuel.

On the other hand, in recent years, the amount of vacuum insulation material (VIP: Vacuum Insulation Panel) is increasing due to its high thermal insulation performance, and it is used in combination with urethane foam materials and used in refrigerators. VIP is formed by wrapping a core material such as cotton-like (fibrous) glass wool (GW) in a plastic bag and evacuating the inside of the bag to form a plate. When this VIP is put into a conventional recycling line, the VIP bag is torn when it is applied to a crusher, and the glass wool as the core becomes a cotton-like lump (small piece) of several mm to several cm. Since this glass wool is lightweight, it flows into the urethane treatment facility by wind sorting. However, since glass wool flows into the urethane treatment facility, there has been a problem that the facility is stopped due to scattering and clogging of the glass wool in the fine crushing step and the temporary storage unit before and after the fine crushing step. In addition, when glass wool is mixed into the granulated urethane fuel, the quality of the fuel may be impaired, such as a decrease in the calorific value of the fuel.
Therefore, it is necessary to sort and remove glass wool, which is the core material of the vacuum heat insulating material, from other lightweight processed materials such as urethane foam.

In the conventional glass wool sorting method, it is disclosed that the outer steel plate of the refrigerator is cut and removed, and the entire VIP or the inner core material is separated (see, for example, Patent Document 1). According to this technology, the iron plates on the side and back of the refrigerator case are cut by vibration push-off using an auto chisel, and the vacuum insulation inside the case is taken out one by one, thereby separating the insulation into urethane and glass wool. To do.
Further, a method has been proposed in which a mark is provided on the outer plate of the refrigerator, and the outer plate is cut along the mark to be disassembled (see, for example, Patent Document 2). According to this technology, the entire iron plate where the VIP is built-in is removed and the VIP is separated together with the bag. In addition, only a part of the iron plate is cut and sucked from a hole opened to the other part while introducing air from there. However, it is disclosed that only the core material inside is taken out.

JP 2006-275308 A JP 2005-69657 A

  In such a conventional method for selecting a heat insulating material, it is necessary to separate and remove glass wool from each refrigerator in order to separate the glass wool before crushing the refrigerator casing. In addition, VIPs having a large use area are used on a total of three sides of the refrigerator side and back, and it is desirable to treat at least all three sides in order to eliminate the risk of shutdown of the urethane treatment facility. However, when processing three surfaces of the refrigerator casing, it is necessary to process one surface at a time while rotating the refrigerator, or to process a plurality of surfaces simultaneously. If each surface is processed, the processing step becomes long, and if it is attempted to simultaneously process a plurality of surfaces, there is a problem that the equipment becomes complicated or a plurality of workers are required.

  Moreover, since the height, width, and depth of the outer shape differ depending on the type of the refrigerator and the use position of the VIP is different, it is necessary to clarify the location of the VIP in advance and to perform processing according to the type. There is no problem if the VIP is located at the manufacturing stage of the refrigerator, for example, by placing a mark on the outer plate, but many refrigerators already on the market do not have such a mark. In addition, even if the location of the VIP is clarified, if you try to make a judgment of the dismantling operator, such as changing the steel plate cutting position according to the VIP position, or using the device to determine the cutting position, the cutting location of the sensor etc. It is necessary to add a mechanism such as a recognition mechanism and a stage or robot that freely changes the position of the cutting tool.

  In recent years, demands for energy savings in refrigerators and increased capacity in refrigerators have led to demand for higher heat insulation efficiency. In addition to large area flat plate VIPs such as the side and back of refrigerators, top surfaces and doors. There is a tendency that VIPs molded into a small or three-dimensional and complicated shape such as a boundary between a compressor and a casing are used. However, in the conventional method for selecting a heat insulating material, problems such as an increase in the number of cut portions of an iron plate and a complicated shape of VIP cannot be easily removed due to an increase in the number of locations used.

  The present invention has been made to solve the above-mentioned problems, and in order to remove the fibrous core material such as glass wool constituting the vacuum heat insulating material, after crushing the casing of the refrigerator, for each material. It is an object of the present invention to provide a heat insulating material sorting apparatus and a heat insulating material sorting method for sorting heat insulating materials.

The heat insulating material sorting apparatus according to the present invention is arranged on the transport surface of the transport machine, which transports the mixed heat insulating material mixed with a plurality of types of heat insulating materials placed on the transport surface and transported. A rotating body whose outer surface opposite the conveying surface rotates, a needle protruding from the outer surface of the rotating body and piercing the mixed heat insulating material, and among the mixed heat insulating materials, a first heat insulating material that is easily removed from the needle And a second recovery part for recovering the second heat-insulating material that is difficult to be removed from the needle.
Further, the heat insulating material sorting apparatus according to the present invention includes a conveying machine for placing and conveying a mixed heat insulating material mixed with a plurality of types of heat insulating materials on the conveying surface, and on the conveying surface of the conveying machine. A rotating body whose outer surface opposite to the conveying surface is rotated, protrudes from the outer surface of the rotating body and pierces the mixed heat insulating material, a needle having a key claw at the tip, among the mixed heat insulating material, The first recovery part for recovering the first heat insulating material caught on the key claw of the needle, and the second recovery part for recovering the second heat insulating material not caught on the key claw of the needle. It is what.

The method for selecting a heat insulating material according to the present invention includes a step of inserting a needle into the first and second heat insulating materials that have been fragmented, the first heat insulating material that is easily removed from the needle that is inserted into the needle, and the needle. The first heat insulating material is removed from the needle by applying a force such that the first heat insulating material is removed from the needle and the second heat insulating material is not removed from the second heat insulating material, which is difficult to come off. It includes a second sorting step of removing the second heat insulating material from the needle through the first sorting step to be removed and the first sorting step.
In addition, the method for selecting a heat insulating material according to the present invention includes a step of inserting a needle having a key claw into the fragmented first and second heat insulating materials that are placed and transported on a transport machine, Among the two heat insulating materials, the first heat insulating material caught on the key claw is removed from the key claw and collected, and the second heat insulating material not caught on the key claw is collected. A second sorting step is included.

  According to the heat insulating material sorting apparatus of the present invention, the first and second heat insulating materials are insulated by the difference in the ease of removal of the pierced needle or the difference in whether or not the hook is caught on the key claw of the pierced needle. It becomes possible to sort materials by material.

According to the method for selecting a heat insulating material of the present invention, the heat insulating material is separated for each material depending on the difference in ease of removal when the heat insulating material is stabbed into a needle, or whether the heat insulating material is caught on the hook of the needle. It becomes possible to sort into.
Other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention with reference to the drawings.

It is a flowchart which shows the recycling process of the heat insulating material by Embodiment 1 of this invention. It is a block diagram which shows the screening device of the heat insulating material by Embodiment 1 of this invention. It is a figure explaining the principle of selection of the heat insulating material by Embodiment 1 of this invention. It is a block diagram which shows the screening device of the heat insulating material by Embodiment 2 of this invention. It is a block diagram which shows the screening device of the heat insulating material by Embodiment 3 of this invention. It is a block diagram which shows the screening device of the heat insulating material by Embodiment 4 of this invention. It is a block diagram which shows the screening device of the heat insulating material by Embodiment 5 of this invention. It is a block diagram which shows the screening device of the heat insulating material by Embodiment 6 of this invention. It is a block diagram which shows the screening device of the heat insulating material by Embodiment 7 of this invention. It is a block diagram which shows the sorting apparatus for enforcing the screening method of the heat insulating material by Embodiment 8 of this invention. In Embodiment 8 of this invention, it is a block diagram which shows the state which stabbed the needle | hook in the heat insulating material. It is a block diagram which shows the sorting apparatus for enforcing the screening method of the heat insulating material by Embodiment 9 of this invention. It is a block diagram which shows the ventilation structure which consists of a rotary body and the air blower of the heat insulating material selection apparatus by Embodiment 10 of this invention. It is a block diagram which shows the ventilation structure which consists of a rotary body and an air blower of the heat insulating material selection apparatus by Embodiment 11 of this invention. It is a block diagram which shows the ventilation structure which consists of a rotary body and an air blower of the heat insulating material selection apparatus by Embodiment 12 of this invention. It is a block diagram which shows the ventilation structure which consists of a rotary body and the air blower of the heat insulating material selection apparatus by Embodiment 13 of this invention. It is a block diagram which shows the screening device of the heat insulating material by Embodiment 14 of this invention.

Embodiment 1 FIG.
A heat insulating material sorting method according to Embodiment 1 of the present invention and a heat insulating material sorting device for carrying out the sorting method will be described with reference to FIGS. 1 to 3.
FIG. 1 is a flowchart showing a heat insulating material recycling step including a heat insulating material selecting step according to Embodiment 1 of the present invention. FIG. 2 is a diagram showing a heat insulating material sorting device used in the core material separating step shown in FIG. 1. FIG. 3 is a cross-sectional view of a principal part of a heat insulating material sorting apparatus for explaining the principle of heat insulating material sorting in the order of steps.

  The recycle processing flow of the refrigerator heat insulating material will be described with reference to FIG. First, the refrigerator is carried into the processing facility (St01), and then components such as a compressor are removed by manual disassembly (St02). Next, the refrigerator casing is put into a crusher with VIP containing glass wool mounted thereon and crushed, and is cut into pieces of about several centimeters to tens of centimeters (St03). Here, the refrigerator casing discharged from the crusher is a small piece made of a material such as metal, plastic, or urethane foam.

Next, the small pieces of the refrigerator casing are sorted into light and heavy items by wind sorting, and light items such as a foamed urethane material and a core material of heat insulating material are separated (St04). Heavy objects are further sorted by various sorting devices such as magnetic sorting, and sorted for each material such as iron, non-ferrous metal, and various plastics (St05). What was isolate | separated as a lightweight thing is sent to the sorting apparatus of the heat insulating material which implements the core material separation process of St10, and a core material is isolate | separated from the mixture of a foaming urethane material and a core material. As described above, the core material is a substance mainly composed of glass wool.
Glass wool is sorted and removed by the glass wool sorting process using this heat insulating material sorting device, and the remaining foamed urethane material is collected by the urethane sorting process, and then crushed into smaller urethane pieces in the next St11 fine crushing process. And the blowing agent such as cyclopentane is removed. Thereafter, the foamed urethane material is granulated at St12 to obtain a urethane fuel.

  That is, by adding a heat insulating material sorting device to the conventional heat insulating material recycling processing facility, and adding a core material separation step St10 (including glass wool and urethane sorting step) using this device, the urethane processing facility is added. The amount of glass wool mixed can be suppressed. In this St10 core material separation process, it is not necessary to remove 100% of glass wool. If 80% to 90% of glass wool can be removed, the risk of shutting down the urethane treatment equipment even if part of the glass wool remains. Can be suppressed.

FIG. 2 is a block diagram showing the heat insulating material sorting apparatus 100 of the present invention used in the heat insulating material core separating step shown in St10 in the heat insulating material recycling process of FIG. This shows a type in which (heat insulating material in the sorting process) flows. In some cases, the workpiece may be inclined and flowed.
The heat insulating material sorting apparatus 100 is an unsorted heat insulation material in an unsorted state in which the urethane foam material 8 and glass wool 9 (corresponding to a core material) selected as a lightweight material by the wind sorting of St04 are mixed. It is a device that sorts according to the material (type).

  A heat insulating material sorting apparatus 100 according to the present invention includes a mixed heat insulating material (a foamed urethane material 8 (corresponding to a second heat insulating material)) and a glass wool 9 (a first heat insulating material) formed by mixing a plurality of types of heat insulating materials. Insulating material charging unit 1 for charging the workpiece, a transporter 2 (conveyor) for placing and transporting the work on the transport surface 2a, and a transport surface 2a of the transport device 2 A rotating body 3 (roller, for example, a cylindrical shape) that is disposed on the outer surface and rotates in accordance with the transport speed and the transport direction of the transporter 2, and an outer surface (for example, a cylindrical outer peripheral surface) of the rotating body 3. ), The linear and tapered needle 3a pierced by the workpiece on the conveying surface 2a and the rotation angle of the rotating body 3 are moved backward in the rotation direction of the rotating body 3. In the first range, the glass of work The glass wool collecting section 6 (corresponding to the first collecting section) for selecting and collecting the tool 9 and the rotation angle of the rotating body 3 are stuck in the needle 3a in the second range other than the first range. A urethane recovery part 7 (corresponding to a second recovery part) for recovering the foamed urethane material 8 that is a workpiece as it is is provided.

  Furthermore, in the heat insulating material sorting apparatus 100 illustrated in FIG. 2, while maintaining the state where the urethane foam material 8 is stuck in the needle 3 a in the region where the rotation angle of the rotating body 3 is in the first range, A blower 4 having a blower function for removing small pieces from the needle 3a and selecting them is provided, and in a region where the rotation angle of the rotating body 3 is in the second range, foaming is a work that remains stuck in the needle 3a. A workpiece removing device 5 having a blowing function for extracting and sorting small pieces of the urethane material 8 from the needle 3a is provided. The blower 4 and the workpiece removing device 5 are airflow generating devices disposed inside the rotating body 3 that blow air in a direction in which the workpiece is detached from the needle 3a. A plurality of holes (opening 30c to be described later) are formed in the side surface of the rotating body 3 to allow airflow to pass therethrough. The rotating body 3 and the needle 3a are made of metal, for example.

When the foamed urethane material 8 which is a foamed resin having an integral structure is stabbed into the needle 3a, a force is applied to push and shrink the hole made by the needle 3a, and the foamed urethane material 8 is pressed against the needle 3a. The urethane material 8 is in a state where it is difficult to be removed from the needle 3a.
On the other hand, the cotton-like glass wool 9 is an aggregate of a large number of fibrous substances, and when pierced by the needle 3a, the fibers of the glass wool 9 move so as to avoid the needle 3a, but the force pushing the needle 3a is weak. It becomes a state where it is easier to come out of the needle 3a than the urethane foam material 8. In the heat insulating material sorting apparatus 100, a characteristic difference (hardness to come out from the needle 3a) that depends on the material of the heat insulating material, whether or not it is easy to come out from the needle 3a when piercing the needle 3a is used. The work is sorted into foamed urethane material 8 and glass wool 9.

  Here, rather than the blower 4 that sifts out the glass wool 9 that is easy to be removed from the needle 3a, the work removing device 5 that sifts out the foamed urethane material 8 that is difficult to escape from the needle 3a is more selected than the needle 3a. Needless to say, the force for pulling out the work stuck in the wire (force for blowing off the work by the air flow generated in the direction from the root of the needle 3a toward the tip) is set to be strong.

  Moreover, although the example which arrange | positions the air blower 4 in the rotary body 3 was shown in FIG. 2, the shape etc. of the needle | hook 3a are devised, and the structure which falls off naturally from the needle | hook 3a in which the front-end | tip part became downward by the dead weight of the glass wool 9 was shown. If so, the blower 4 can be omitted. In this case, it is effective to make the needle 3a linear and tapered.

  As illustrated in FIG. 2, the glass wool collection unit 6 is disposed at a position corresponding to the downstream side of the transporter 2, and the workpiece that has fallen off from the end of the transporter 2 and the needle 3 a is recovered. ing. The glass wool 9 contained in the box constituting the glass wool collection unit 6 is discarded, for example.

  Here, for example, when the work is stabbed into the needle 3a whose tip is downward in the lower part of the rotator 3, the needle 3a stabbed with the work moves from the lowermost part of the rotator 3 to the rear in the rotation direction. A rotation angle of 90 degrees until the tip of 3a faces in the horizontal direction corresponds to the first range. In this first range, the needle 3a is facing downward, and the air flow sent from the blower 4 (the glass wool 9 is detached from the needle 3a and the foamed urethane material 8 is a strong air current that does not come off the needle 3a) causes Therefore, it becomes easy to selectively screen out the glass wool 9, which has the property of being easily removed from the needle 3a.

Further, as illustrated in FIG. 2, the urethane recovery unit 7 is disposed in a region where the rotation angle of the rotating body 3 is in a second range different from the first range, and the rotation is performed in the first range. Through the glass wool sorting process, the workpiece (foamed urethane material 8) that is not dropped and remains on the needle 3a until the end is collected. The urethane foam 8 is removed from the needle 3a and collected in the box constituting the urethane recovery section 7, and the recovered urethane foam 8 is transported to the next urethane fine crushing process and granulated. It becomes urethane fuel through the process.
Here, for example, the rotation angle from 90 degrees after passing through the first range to the bottom again is equivalent to the second range for the work stuck in the needle 3a in the lower part of the rotating body 3. . When the second range is, for example, a half rotation or more from the lowermost part of the rotating body 3 and the needle 3a faces downward from the horizontal, the urethane collection unit 7 and the glass wool collection unit 6 are installed. The locations can be arranged with the rotating body 3 interposed therebetween, and the workpiece can be dropped from the needle 3a with a smaller airflow than when the tip of the needle 3a is upward from the horizontal.

  In the example of FIG. 2, the shaft of the rotating body 3 is illustrated as being arranged in a direction parallel to the transport surface 2a and orthogonal to the transport direction. However, if the shaft intersects the work transport direction, the needle 3a is moved. It can be pushed and pierced toward the transport surface 2a, and the transport direction and the direction of the collection unit can be distributed and arranged. Moreover, when the axis | shaft of the rotary body 3 is arrange | positioned diagonally with respect to a workpiece conveyance direction, the width | variety of the rotary body 3 can be arrange | positioned longer on the conveyance surface 2a than the case where it orthogonally crosses, and it is for selection of a heat insulating material. The planting surface of the needle 3a to be used can be widened.

  Next, the principle of sorting by the needle 3a of the heat insulating material sorting apparatus 100 will be described with reference to FIGS. 3 (a) to 3 (e). Each figure in FIG. 3 corresponds to a cross-sectional view of the main part illustrating the selection stage of the rotator 3 shown in FIG. 2 at the rotation angles indicated by symbols a, b, c, d, and e. In the description of FIG. 2 described above, an example in which an airflow generator is used to drop a workpiece from the needle 3a has been shown. However, in addition to using an airflow to drop a workpiece, one of methods for applying an external load is used. There is also a method of applying vibration, and FIG. 3 illustrates a case where the rotating body 3 is vibrated.

  First, as shown in FIG. 3A, the fragmented mixture (workpiece) of the urethane foam material 8 and glass wool 9 is charged into the heat insulating material charging unit 1 and conveyed to the vicinity of the rotating body 3 by the conveyor 2. 2, the foamed urethane material 8 and the glass wool 9 placed on the transport surface 2 a of the transporter 2 approach the lower part of the rotating body 3 at the position of the needle 3 a indicated by the symbol a in FIG. The tip of the needle 3a located in the section is in a state of facing down.

  Next, as shown in FIG. 3 (b), since the speed of the conveyor 2 and the rotational speed of the needle 3a of the rotating body 3 are adjusted to be the same, the needle 3a approaches and pierces the workpiece, At the position of the needle 3a indicated by the symbol b in FIG. 2, the needle 3a is positioned at the lowermost part of the rotating body 3, the tip of the needle 3a is closest to the transport surface 2a, and the needle 3a is stuck in the work on the transport surface 2a. It becomes a state.

Next, as shown in FIG. 3 (c), at the position of the needle 3a indicated by the symbol c in FIG. It moves to (left side of the paper) and the workpiece is lifted from the transport surface 2a. Here, since the urethane foam material 8 has an integral structure even if there are many voids, the periphery where the needle 3a is stabbed is deformed and strain is generated, so that the needle 3a is tightened. Power works. On the other hand, the glass wool, which is the core material of the foam material, is merely a collection of fibrous materials, and when the needle 3a is stabbed, the fibers around the needle 3a move. Although the fibers are entangled but not firmly connected, the force for tightening the needle 3 a is smaller than that of the urethane foam material 8.
That is, at this stage, the glass wool 9 is held by the needle 3a in a state where it is easy to come off, and the urethane foam material 8 is held in a state where it is difficult to come off.

Next, as shown in FIG. 3 (d), when the needle 3a is lifted further along with the rotation of the rotating body 3 and reaches the position of the needle 3a indicated by the symbol d in FIG. 2, the needle 3a passes through the needle 3a. In order to vibrate the workpiece, the rotating body 3 is vibrated, and the glass wool 9 that is easily removed from the needle 3a is selectively dropped from the needle 3a for sorting (same as the first sorting step and the glass wool sorting step). Here, the vibration applied to the work corresponds to a force that pulls out the work from the needle 3a, and the magnitude of the force is a foamed urethane material in which the glass wool 9 that is easy to come off from the needle is detached from the needle 3a and is hard to come off from the needle. 8 is adjusted to a size that does not come off the needle 3a. The drive device that vibrates the rotating body 3 is provided in a portion not shown.
Further, as described above, the force for pulling out the workpiece from the needle 3a includes the force due to the weight of the workpiece.

  After this selection, the foamed urethane material 8 remains on the needle 3a, but the fibrous glass wool 9 first falls from the needle 3a and is returned to the downstream side of the conveying surface 2a or directly put into the glass wool collecting unit 6. . Here, in the case of sorting using airflow, it goes without saying that the same sorting as in the case of applying vibration can be performed by blowing air on the workpiece.

Next, as shown in FIG. 3 (e), the urethane foam material 8 is difficult to be removed from the needle even when an external load is applied, so it remains on the needle as it is, passes over the rotating body 3, and is on the opposite side (right side of the drawing). Move to. In the position of the needle 3a indicated by the symbol e in FIG. 2, the heat insulating material is obtained by performing sorting (same as the second sorting step and the urethane sorting step) in which the foamed urethane material 8 remaining on the needle 3a is finally dropped from the needle 3a. Sorting is completed. The foamed urethane material 8 that has entered the box of the urethane recovery unit 7 is carried to the next urethane fine crushing step by, for example, a conveyor or air transport.
In the region where the rotation angle of the rotator 3 is in the second range, the selection of the urethane foam material 8 performed by applying vibration needs to give a larger vibration than the selection of the glass wool 9, and the rotation. It is necessary to adjust so that there is no influence on the first range in which the rotation angle of the body 3 is 90 degrees backward from the lowest part.

2 employs a structure in which a plurality of needles 3a are provided on the outer surface of the rotating body 3, thereby causing the sorting step shown in FIG. 3 to occur continuously. It is what. A large number of needles 3 a are arranged on the outer surface of the rotating body 3, and these needles 3 a can be arranged so that the distance between the needles becomes equal, for example.
In addition, the pitch of the needles 3a (corresponding to the density of the needles 3a implanted in the rotating body 3) is changed according to the heat-insulating material selection processing status, in addition to being uniform over the entire outer surface of the rotating body 3. Can do. For example, on the conveyance surface 2a of the conveyance device 2 arranged to face the rotating body 3, a relatively large size work is caused to flow in the center of the conveyance surface 2a, and a relatively small size is formed at the end of the conveyance surface 2a. If there is a tendency for the workpiece to flow, the pitch of the needle 3a provided on the rotating body 3 is adjusted in advance so that it is large at the center and small at the end. 3a can be stabbed and sorted to improve the sorting efficiency of the heat insulating material.

  Thus, according to the heat insulating material selection method using the heat insulating material selecting device 100 of the present invention, the step of piercing the needle 3a into the fragmented heat insulating material (work), the heat insulating material piercing the needle 3a On the other hand, a glass wool sorting step (corresponding to the first sorting step) in which the heat insulating material is removed from the needle 3a by a force (blowing, vibration, self-weight) that removes the heat insulating material from the needle 3a, and this glass wool sorting step. After that, it includes a urethane sorting step (corresponding to the second sorting step) in which the heat insulating material stuck in the needle 3a is removed from the needle 3a, and the needle 3a is pulled out when the needle 3a is stuck in the workpiece. Depending on the ease, the workpiece can be easily sorted into the urethane foam material 8 and the glass wool 9.

Depending on the size and properties of the foamed urethane material 8 and glass wool 9 that are the heat insulating materials to be selected, the parameters such as the air flow by the blower 4 and the work removal device 5 and the thickness and length of the needle 3a are optimized. It goes without saying that setting is desirable.
As described above, according to the present invention, it is possible to continuously and easily sort the urethane foam material 8 and the glass wool 9 which is the core material of the vacuum heat insulating material after the refrigerator casing is crushed. Therefore, unlike the conventional case, it is not necessary to remove the VIP individually from the refrigerator one by one, and therefore, it is not necessary to perform a complicated operation of removing the iron plate in accordance with the refrigerator type and the position where the VIP is built. In addition, it is possible to sort regardless of a small VIP or a complicated VIP that is not a flat plate in a ceiling or door of a refrigerator housing, which has been increasingly used in recent years.

Embodiment 2. FIG.
FIG. 4 shows a heat insulating material sorting apparatus 100 according to Embodiment 2 of the present invention, and a heat insulating material sorting method will be described.
In the first embodiment described above, in the urethane sorting step (second sorting step), in order to pull out the workpiece made of the foamed urethane material 8 that is difficult to be removed from the needle 3a from the needle 3a, the workpiece removing device 5 is provided, Alternatively, the removal using vibration) has been described. In the second embodiment, as shown in FIG. 4, when a workpiece is removed from the needle 3a, a scraping plate 10 (corresponding to a guide plate) that guides the workpiece from the root of the needle 3a to the tip is used. explain.
The scraping plate 10 of FIG. 4 is disposed outside the region where the rotation angle of the rotating body 3 is in the second range, contacts the workpiece pierced by the needle 3a, and moves the workpiece from the root of the needle 3a toward the distal end. In order not to interfere with the rotating needle 3a, a hole (slit) is provided in the passage portion of the needle 3a.

Next, the operation of the scraping plate 10 will be described.
The urethane foam material 8 remaining in the state of being stuck in the needle 3a after the glass wool sorting process moves with the rotation of the rotating body 3 and comes into contact with the scraping plate 10. The scraping plate 10 guides the foamed urethane material 8 remaining on the needle 3a from the root of the needle 3a to the tip in a direction in which the workpiece is removed from the needle 3a. The foamed urethane material 8 that has come out of the needle 3a rolls on the upper surface of the scraping plate 10 and enters the box of the urethane recovery unit 7 to complete the urethane sorting step.

The shape of the scraping plate 10 may be configured by combining a curved plate or a plurality of members so that the urethane foam material 8 can be more smoothly removed from the needle 3a in addition to a flat plate. Further, the scraping plate 10 can be used in combination with the workpiece removing device 5 that generates the airflow shown in FIG.
According to this configuration, the work remaining on the needle 3a can be physically removed without depending on the airflow of the work removal device 5, and the foamed urethane material 8 can be efficiently sorted.

Embodiment 3 FIG.
A heat insulating material sorting apparatus 100 according to Embodiment 3 of the present invention is shown in FIG. 5 and a heat insulating material sorting method will be described.
In Embodiment 2 described above, in the urethane sorting step (second sorting step), in order to remove the workpiece made of the foamed urethane material 8 that is difficult to be removed from the needle 3a from the needle 3a, the scraping plate 10 serving as a workpiece guide plate is used. In the third embodiment, a case will be described in which the workpiece is removed using the cylindrical guide plate 11 that covers the rotating body 3 in order to remove the workpiece from the needle 3a.

The cylindrical guide plate 11 has a cylindrical shape and is arranged on the outside of the rotating body 3 so as to be eccentric with respect to the axis of the rotating body 3. For example, the cylindrical guide plate 11 rotates at the same rotational speed in synchronization with the rotation of the rotating body 3. is there. The cylindrical guide plate 11 is provided with a plurality of holes through which the needle 3a passes so that the needle 3a does not interfere with the portion facing the needle 3a. By setting the diameter of the needle 3a to be slightly smaller than the diameter of the hole of the cylindrical guide plate 11, the hole can have a structure that does not hinder the movement of the needle 3a.
When the cylindrical guide plate 11 is used without being rotated, the opening area of the hole through which the needle 3a passes is larger than when the cylindrical guide plate 11 is rotated.

Further, as described above, the cylindrical guide plate 11 is attached eccentrically with respect to the rotation center of the rotating body 3, and the needle 3 a enters and exits from the side surface of the cylindrical guide plate 11 as the rotating body 3 rotates. It has become. Since the needle 3a protrudes from the cylindrical guide plate 11 in the vicinity of the transport surface 2a, the workpiece can be pierced.
Even after the glass wool 9 is removed from the needle 3a, the foamed urethane material 8 remains on the needle 3a. However, as the rotating body 3 and the cylindrical guide plate 11 rotate, the needle 3a enters the cylindrical guide plate 11. Then, the foamed urethane material 8 pulled out from the needle 3 a slides on the surface of the cylindrical guide plate 11 and enters the urethane recovery unit 7 box.
In addition, since the blower 4 used at the time of glass wool selection is provided inside the rotating body 3 by providing the cylindrical guide plate 11 on the outer side of the rotating body 3, it becomes difficult to secure an air passage. For example, the rotating body 3 and the cylinder It corresponds by arrange | positioning above the glass wool collection | recovery part 6 outside the induction | guidance | derivation board 11. FIG.

  As described above, in the lower part of the rotating body 3 and the glass wool sorting section, which are the first range of the rotating body 3, the needle 3a protrudes from the cylindrical guide plate 11, and the needle 3a does not hinder the operation of piercing the workpiece, and rotates. In the urethane sorting section, the body 3 further rotates and becomes the second range. As the rotating body 3 rotates, the protrusion amount of the needle 3a from the cylindrical guide plate 11 decreases, and the workpiece is moved from the needle 3a. It is possible to guide in the direction of removal. Therefore, the work remaining on the needle 3a can be physically removed without relying on the airflow or the like of the work removal device 5 shown in the first embodiment, and the urethane foam material 8 remaining on the needle 3a is reduced. It becomes possible. Further, according to the cylindrical guide plate 11, since the workpiece can be scraped from the root of the needle 3a, it is possible to remove a minute workpiece that tends to remain on the outer surface of the rotating body 3.

Embodiment 4 FIG.
In the above-described first embodiment, when the heat insulating material is selected, the workpiece is removed from the needle 3a by vibration. In this fourth embodiment, as shown in FIG. The case where the glass wool 9 is removed from the needle 3a by vibration and the urethane foam material 8 is removed from the needle 3a by the scraping plate 10 will be described.
As shown in FIG. 6, the heat insulating material sorting apparatus 100 has a structure in which the rotating body 3 is vibrated by the driving device 30. Specifically, the structure that supports the rotating shaft of the rotating body 3 is supported by a spring or the like, and the rotating body 3 is vibrated by a prime mover or an electromagnet with an eccentric weight attached to the tip. Yes.

According to this configuration, the glass wool 9 that easily falls off from the needle 3a is easily pulled out even when stabbed into the needle 3a due to the vibration of the rotating body 3, and falls on the transport surface 2a. Therefore, the blower 4 shown in the first embodiment or the like is not necessary.
Further, when sending the airflow from the inside of the rotating body 3 to the outside, it is necessary to open a hole (air hole) through which the airflow passes through the rotating body 3, but it is easy to come out of the needle 3 a due to vibration by the driving device 30. When removing the glass wool 9, it is not necessary to provide a ventilation hole in the rotating body 3.
Since the mechanism for dropping the glass wool 9 from the needle 3a may be either the blower 4 or the vibration of the rotating body 3 by the driving device 30, either can be selected from the problem of the device structure.
The sorting method for removing the workpiece from the needle 3a by the vibration of the fourth embodiment is effective when the use of compressed air in the factory is difficult due to the environment of the equipment.

Embodiment 5. FIG.
The heat insulating material sorting apparatus 100 shown in the first to fourth embodiments has a configuration in which one rotating body 3 is disposed on the transport surface 2a of the transport machine 2, and the pitch of the needles 3a of the rotating body 3 is as follows. Smaller workpieces are more likely not to pierce the needle 3a regardless of the material, and may be collected and discarded together with the selected glass wool 9 downstream of the transporter 2.
In the fifth embodiment, as shown in FIG. 7 which shows a heat insulating material sorting apparatus 100, another sort of work that has been left behind by the needle 3 a of one rotating body 3 is arranged downstream of the transporter 2. This is performed by piercing the needle 3b having a smaller pitch between the needles by one rotating body 3, and this heat insulating material sorting device 100 is provided with a plurality of rotating bodies 3.

As shown in FIG. 7, the heat insulating material sorting apparatus 100 is arranged on the upstream side in the transport direction of the transporter 2 and has a large rotating body 3 (corresponding to the first rotating body) between the needles 3 a (needle pitch). And a rotating body 3 (corresponding to a second rotating body) arranged on the downstream side in the transporting direction of the transporter 2 and having a small interval between the needles 3b. Each rotating body 3 is provided with a urethane recovery unit 7, a relatively large size urethane foam material 8 is collected in the upstream urethane recovery unit 7, and small in the downstream urethane recovery unit 7. A size urethane foam material 8 is collected. The length / thickness / interval (pitch) of the needle 3a of the upstream and downstream rotating bodies 3 and the distance between the needle 3a and the conveyor 2 are changed and optimized in consideration of the operating conditions of the apparatus. Can be used.
According to this configuration, the rotating body 3 on the downstream side of the urethane foam material 8 having a small diameter that has entered the gap between the adjacent needles 3a and did not pierce the needles 3a with the rotating body 3 on the upstream side in the workpiece conveyance direction. Once again, an opportunity to touch the needle 3b can be given.

  In sorting in which workpieces of different sizes are mixed, a plurality of workpieces placed on the conveyance surface 2a of the conveyor 2 are overlapped, and a small-sized workpiece flows so as to be hidden under the large-sized workpiece. It is assumed that it will come. In this case, if the large size workpiece is the urethane foam material 8 and the small size workpiece is the glass wool 9, the large size foam urethane material obstructs the air flow, and the small size glass wool 9 in the first range. Cannot be dropped from the needle 3a, and the urethane recovery unit 7 is mixed. Therefore, the rotary body 3 having the needles 3a having a large pitch can be used to sort the workpieces of large dimensions step by step so that the workpiece dimensions can be adjusted so that hidden workpieces are not generated as much as possible. Even when there is a variation in the size of the target heat insulating material, it is possible to process stably.

Embodiment 6 FIG.
In the heat insulating material sorting apparatus 100 shown in the first to fifth embodiments described above, the rotating body 3 provided with the needle 3a is exemplified as having a cylindrical shape. In the sixth embodiment, a case in which a cylindrical belt 12 is used instead of the cylindrical rotating body 3 will be described.
In the sixth embodiment, as shown in FIG. 8 showing the heat insulating material sorting device 100, the belt 12 (corresponding to a rotating body) has the inner periphery of the belt 12 in contact with the outer periphery of the plurality of support rotating shafts 13. The plurality of support rotating shafts 13 are arranged in parallel to each other, and arranged so as to be parallel to the transport surface 2a of the transport machine 2 and intersect the transport direction. In the example of FIG. 8, a total of three support rotation shafts 13 are arranged, one at each of the positions protruding from the lower portion of the belt 12 (center) on the paper surface and the left and right positions of the belt 12. ing. A needle 12a protruding from the outer surface of the belt 12 is stabbed into a work on the transport surface 2a of the transport machine 2 at a lower portion of the support rotary shaft 13 located at the center on the paper surface, and the heat insulating material is selected.
The belt 12 is made of metal or resin. In the case of resin, the belt 12 is supported by using a support member in combination to hold the metal needle 12a.

  As shown in FIG. 8, instead of the cylindrical rotating body 3, a belt 12 (needle conveyor) in which needles 12a protrude side by side is used. The belt 12 is arranged such that the lower surface is inclined with respect to the workpiece conveying surface of the conveyor 2, and the interval between the needle 12 a of the belt 12 and the conveying surface 2 a is gradually narrowed. That is, in the lower part of the belt 12, a sufficient range is ensured so that the tip of the needle 12 a faces downward. Further, on the downstream side in the conveying direction, a box is arranged in the order of the glass wool collecting unit 6 and the urethane collecting unit 7, the belt 12 is extended to the upper part of these boxes, and the blower 4 and the work removing device 5 are installed along the flow of the belt 12. By providing, the glass wool collection | recovery part 6 and the urethane collection | recovery part 7 can be arranged side by side.

In the case of the cylindrical rotating body 3 shown in the above-described first to fourth embodiments, it has been desired to increase the diameter of the rotating body 3 in order to slowly insert the needle 3a into the workpiece. According to the configuration of the heat insulating material sorting apparatus 100 according to the fifth aspect, by disposing the support rotation shaft 13 so that the distance between the conveyor 2 for conveying the workpiece and the belt 12 including the needle 12a is gradually reduced, The needle 12a can be slowly and vertically inserted into the workpiece, and the risk of the needle 12a being broken can be reduced.
Further, the blower 4 and the workpiece removing device 5 disposed on the inner side of the belt 12 can be freely determined in the range where the belt 12 is provided, and there is an advantage that the degree of freedom of arrangement of the constituent members is increased.

Embodiment 7 FIG.
In the heat insulating material sorting apparatus 100 shown in the first to sixth embodiments described above, the workpiece that has not stuck in the needle 12a (or the needle 3a) of the belt 12 (or the rotating body 3) is transported to the downstream side of the conveyor 2. It was configured to be put in the glass wool collection unit 6. In the seventh embodiment, a heat insulating material sorting apparatus including a re-input unit 14 that collects an unsorted work that has fallen downstream of the transport machine 2 and does not pierce the needle 3a and returns it to the upstream of the transport machine 2 again. 100 will be described.

In the seventh embodiment, as shown in FIG. 9, the re-input unit 14 (work collection mechanism) may be a conveyor type or an air conveyance type. Most of the workpieces that have fallen from the conveyance surface 2a at the downstream end of the conveyance machine 2 are glass wool 9, but some of them also include the urethane foam material 8 that enters between the needles 12a and the needles 12a are not pierced. It is.
According to this configuration, since the foamed urethane material 8 that has fallen immediately from the end of the transporter 2 and has not pierced the needle 12a can be returned upstream in the transport direction of the transporter 2, the needle 12a again. It is possible to give an opportunity to stab and sort, and to improve the recovery purity of the glass wool 9 and the recovery rate of the urethane foam material 8 can be obtained.

Embodiment 8 FIG.
In the heat insulating material sorting apparatus 100 shown in the first to seventh embodiments, the linear rotating needle 3a or the needle 12a is rotated by rotating the belt 12 supported by the cylindrical rotating body 3 or the plurality of supporting rotating shafts 13. We explained that the material was stabbed into the workpiece and sorted according to the ease of removal of the workpiece from the needle for each material of the heat insulating material.
In the eighth embodiment, a description will be given of a case where a needle having a hooked claw is inserted into a workpiece instead of a linear shape, and the heat insulating material is selected for each material depending on whether the needle is inserted or not.

FIG. 10 is a configuration diagram of a heat insulating material sorting apparatus 100 according to the eighth embodiment. In this figure, the transport machine 20 includes a suspension 21 and has a function of adjusting the height of a transport surface that transports a workpiece. ing. Further, a conveyor belt 15 (corresponding to a rotating body) provided with needles 15 a rotates on the conveyor 20 at the same speed as the rotation, and the workpiece is sandwiched between the belt 15 and the conveyor surface of the conveyor 20. As a result, the needle 15a is stabbed into the workpiece. The width of the belt 15 is set to cover the conveyance surface.
As shown in FIG. 11, an enlarged view of the main part of the belt 15, the needle 15 a that pierces the workpiece protrudes from the outer surface of the belt 15, and as described above, the needle 15 a is bent at a position of several millimeters from the tip. The key claw 15b is configured. Then, the key claw 15b is stuck into the workpiece, whereby the glass claw 15b made of the aggregate of fibers is caught in the key claw 15b and the needle 15a is stuck, but the foamed urethane material 8 does not pierce the key claw 15b. It becomes a state.

Here, the belt 15 is basically made of rubber, the needle 15a is made of plastic or metal such as steel wool, and the key claw 15b provided on the needle 15a is the tip of the protrusion on one side of the Velcro (registered trademark). It has a shape like a part. Further, many needles 15 a protrude from the outer surface of the belt 15, each of which is formed into a thin fiber shape and has flexibility, and the needle 15 a is configured to be concentrated on the outer surface of the belt 15 so as to stand upright. ing.
Since the key claw 15b is stabbed into and entangled with the fiber of the cotton wool glass 9 when it is pressed against the work, the belt 15 is held while the glass wool 9 is held on the needle 15a as the belt 15 moves. Can be moved backwards.

  In the above-described first to seventh embodiments, the glass wool 9 is first sorted and then the urethane foam material 8 is recovered. However, when the heat insulating material sorting device 100 of the eighth embodiment is used, foaming is performed. The urethane material 8 does not pierce the needle 15 a, falls from the conveyance surface downstream of the conveyance machine 20, is recovered first, and the glass wool 9 that pierces the needle 15 a and moves to the rear of the belt 15 is fed by the blower 4 to the needle 15 a. It can be recovered by applying a force that removes the workpiece from the machine and dropping it down.

A heat insulating material sorting method using the heat insulating material sorting device 100 according to the eighth embodiment will be described in order.
First, the unsorted heat insulating material (work) carried by the transporter 2 is sandwiched between the transport surface of the transporter 20 and the belt 15. The conveyor 2 and the belt 15 are driven with constant speed or with a relative speed difference. Further, the conveyor 2 or the belt 15 includes a suspension 21 to generate a force for sandwiching the workpiece between the conveyor surface of the conveyor 2 and the belt 15.

  Of the unsorted heat insulating material that has been transported from the heat insulating material charging unit 1 to the transporter 2, the fibrous glass wool 9 is entangled with the belt 15 by the effect of the key claw 15b of the needle 15a. When the work moves to the downstream end of the transporter 2, the urethane foam material 8 that has not been entangled with the belt 15 falls into the box of the urethane recovery unit 7 as it is. The glass wool 9 entangled with the needle 15 a of the belt 15 moves to the rear end portion of the belt 15, is peeled off from the belt 15 by the action of an air flow or the like by the blower 4, and falls into the box of the glass wool collection unit 6.

  The sorting using the belt 15 may be performed after removing the large urethane foam material 8 using the rotating body 3 shown in the first embodiment and the like. Since it is difficult for the belt 15 to grip a workpiece having a large size, when there is a workpiece having a size of about 10 mm, the workpiece is basically used in combination with the rotating body 3 or the like.

According to this configuration, since the selection is performed using the belt 15 having a structure in which the needles 15a having the minute lock claws 15b are erected, when the cylindrical rotating body 3 is used, the needle 15a enters between the needles. It is possible to give an opportunity for sorting to a work with a minute size.
In addition, by providing the suspension 21, even when workpieces having different heights are thrown side by side, the probability that the workpiece is brought into contact with the key claw 15b attached to the belt 15 is increased, and the insulating material selection efficiency is improved. Is possible.

Embodiment 9 FIG.
In the above-described first to eighth embodiments, a needle is pierced into unsorted heat insulating material (work), and selection is made for each material depending on whether the needle is easy to remove or difficult to remove, or whether the needle pierces or does not stick. An example of performing is shown. In the ninth embodiment, a method for selecting the foamed urethane material 8 and the cotton-like glass wool 9 by wind sorting after the foamed urethane material 8 is deformed by thermal compression without using a needle for selecting the heat insulating material. explain.

  FIG. 12 is a configuration diagram showing a heat insulating material sorting apparatus 100 for carrying out the heat insulating material sorting method according to the ninth embodiment. As shown in FIG. 12, instead of the rotating body 3 of the first embodiment, FIG. A belt 16 (same as a rotating body, a pressing belt, or a roller) having a heater 18 (heating unit) is provided, and a wind power sorter 17 is provided at the downstream end of the conveyor 2 as means for applying an external load to the workpiece. . Here, the belt 16 provided with the heater 18 and the conveyance surface of the conveyance device 2 that conveys the workpiece are arranged to face each other with a slight gap of about several mm, or the belt 16 provided with the heater 18 by a spring or the like. Is pressed against the conveying surface side of the conveyor 2.

  The mixture of heat insulating materials supplied to the heat insulating material charging unit 1 is sandwiched between the belt 16 having the heater 18 and the transport surface of the transport device 2, and is thermally compressed and deformed. The urethane foam material 8 is softened and deformed by being sandwiched and pressed between two face portions that are opposite to each other while heating the workpiece. Its shape is maintained. On the other hand, even if the workpiece made of glass wool 9 is pressed while being heated, when the compression is released, the bulge returns to near the original shape and is restored. There is no significant difference in apparent specific gravity between the urethane foam material 8 and glass wool 9 before heat compression, but the urethane foam material 8 and the glass wool 9 after heating are deformed and the apparent specific gravity is greater. Becomes larger. Each workpiece after thermal compression is transported to the wind power sorter 17 by the conveyor 2, the urethane foam material 8 is returned to the weight-side urethane recovery part 7, and the glass wool 9 restored to the shape before thermal compression is recovered to the lightweight side glass wool. Move to section 6 respectively.

The heating by the heater 18 is performed at a temperature that alters the urethane foam material 8 and does not alter the glass wool 9.
Further, it is assumed that the urethane foam material 8 is deformed by heat compression by the belt 16 and rotates while being attached to the outer surface of the belt 16. In order to prevent this, a scraper 16a that peels the workpiece from the belt surface is disposed along the outer surface of the belt 16 behind the thermal compression range of the belt 16, and the workpiece is dropped from the outer surface of the belt 16.
This heat insulating material sorting method can be applied only when the core material constituting the vacuum heat insulating material is glass wool, but because it adds a thermal compression process, the volume reduction of urethane foam is selected. It can be carried out simultaneously with the treatment, and the storage amount can be increased when temporary storage or the like is performed before the urethane fine crushing in the next step.

Embodiment 10 FIG.
In the heat insulating material sorting apparatus 100 according to the above-described first, second, and fifth embodiments, the structure in which the blower 4 is provided inside the cylindrical rotating body 3 is shown. The blower 4 includes a prime mover that generates an airflow as a component, and the prime mover is disposed inside the rotating body 3. However, the air blower 4 can be configured such that the prime mover can be provided outside the rotating body 3 and the generated airflow is guided to the inside of the rotating body 3.
In the tenth embodiment and the eleventh to thirteenth embodiments described later, the rotating body 3 and the blower 4 of the heat insulating material sorting apparatus 100 when the prime mover 40 constituting the blower 4 is disposed outside the rotating body 3. Various modifications of the air blowing structure composed of the combinations will be described.

FIG. 13 is a configuration diagram showing a blowing structure including the rotating body 3 and the blower 4 of the heat insulating material sorting apparatus 100 according to Embodiment 10 of the present invention, and is a cross-sectional view perpendicular to the axial direction of the rotating body 3 (paper surface) Left side) and a sectional view along the axial direction (right side of the drawing).
In the heat insulating material sorting apparatus 100 according to the tenth embodiment, as shown in FIG. 13, the support structure of the rotating body 3 is mainly composed of a rotating shaft 31 extending in the axial direction and a bearing 31 a that supports the rotating shaft 31. It is configured. And the air blower 4 is mainly comprised by the motor 40 and the nozzle 41 (airflow guide part) which guides the airflow connected with this motor 40. FIG.

  In this case, as shown in FIG. 13, the rotating shaft 31 inserted through the cylindrical portion 30 a of the rotating body 3 is fixed to one closed end surface portion 30 b of the rotating body 3. Then, the other end of the rotating body 3 was released without being blocked, and a nozzle 41 for guiding the airflow was inserted along the axial direction from the released end into the inner side of the rotating body 3. It is in a state.

The nozzle 41 inserted inside the cylindrical portion 30a causes the airflow to be guided to blow outwardly from the outer surface (cylindrical outer peripheral surface) of the cylindrical portion 30a and through the opening 30c formed in the cylindrical portion 30a. The air flow outlet is provided toward the inner surface side of the cylindrical portion 30a.
And since this nozzle 41 is being fixed to the motor | power_engine 40 side, even if the rotary body 3 rotates, since the nozzle shape is a shape extended in an axial direction, rotation of the rotary body 3 is carried out. Accordingly, the airflow can be sequentially applied in the circumferential direction of the cylindrical portion 30a, and the airflow can be applied to the entire surface of the cylindrical portion 30a by rotating the rotating body 3 once.

In this way, by configuring the blower 4 with the prime mover 40 that generates the airflow, and the nozzle 41 that is connected to the air prime mover 40, guides the flow to the inside of the rotating body 3, and discharges the flow outward from the cylindrical surface, Only the nozzle 41 is disposed in the rotating body 3, and the prime mover 40 can be disposed outside the rotating body 3. The prime mover 40 can also be omitted by replacing it with a mechanism capable of generating an airflow, for example, a configuration for sending compressed air from a factory to the nozzle 41.
As a result, the prime mover 40 is not disposed inside the rotator 3, and only the airflow guide structure (nozzle 41) is inserted, so the size of the rotator 3 to be used is small regardless of the size of the prime mover. Can be realized.

And according to this structure, the rotary body 3 can be made into the simple shape of the cylinder shape by which one end surface was obstruct | occluded and the other end surface was open | released, and the support structure also has the rotating shaft 31 by the bearing 31a. Since it can be a simple structure of supporting, the equipment cost can be reduced at a low cost.
Here, the rotating body 3 propagates an external driving force to the rotating shaft 31 or holds the rotating body 3 in a free state on the bearing 31a and directly propagates the external driving force to the rotating body 3 or the like. It can be rotated by this method.
Moreover, when the rotary body 3 is lightweight, the rotary body 3 can also be rotationally driven by the driving force which advances in the conveyance direction obtained by making the front-end | tip of the needle | hook 3a contact the conveyance surface 2a.

  In addition, in FIG. 13, the air blower 4 which blows off the glass wool 9 among the heat insulating materials stuck in the needle | hook 3a was illustrated, and the ventilation structure which consists of the motor 40 and the nozzle 41 was demonstrated. However, it goes without saying that this blower structure can also be applied to the workpiece removing device 5 that blows off the urethane foam material 8.

Embodiment 11 FIG.
In the example of Embodiment 10 described above, the use of the blower 4 in which the prime mover 40 and the nozzle 41 serving as the airflow guide unit are integrally provided has been described. However, the airflow guide portion can be provided on the rotating body 3 side separately from the prime mover 40.
FIG. 14 is a configuration diagram showing the air blowing structure of the heat insulating material sorting apparatus 100 according to the eleventh embodiment, in which the air flow guide groove 42 serving as the air flow guide portion rotates on the inner peripheral side of the cylindrical rotating body 3. The structure provided integrally with the body 3 is shown.
In the air blowing structure of FIG. 14, the airflow is provided from the outside of the end surface portion of the rotator 3 to the inside of the rotator 3 through the end surface opening 30 d opened in the end surface portion of the rotator 3. It is fed into the guide groove 42.

  As shown in FIG. 14, in the heat insulating material sorting apparatus 100 according to the eleventh embodiment, the support structure of the rotating body 3 includes a rotating shaft 31 that extends in the axial direction and a bearing 31 a that supports the rotating shaft 31. In addition, the blower 4 is mainly configured by a prime mover 40 and an airflow guide groove 42 (airflow guide portion) that is separated from the prime mover 40 and provided on the inner peripheral side of the rotating body 3.

When the motor 40 sends an air flow in the axial direction of the rotating body 3 from the end surface opening 30d of one end surface of the rotating body 3, the motor 40 passes through the air flow guide groove 42 formed in the rotating body 3 and opens the cylindrical surface. Air is discharged outward from 30c.
Here, it is desirable that the air flow guide groove 42 has a curved surface shape that can change the axial surface airflow into a radially outward airflow (a direction perpendicular to the axial direction and away from the shaft).
Further, by adding the fins 42 a inside the airflow guide groove 42, it is possible to adjust the flow velocity distribution of the airflow.

The airflow guide groove 42 is a slit extending along the axial direction on the inner circumferential side of the rotating body 3, and a plurality of slits are arranged side by side in the circumferential direction of one rotating body 3. Then, if the portion of the rotator 3 to which the airflow sent from the prime mover 40 hits is the airflow introduction portion 4b, the airflow introduction portion 4b is switched to the adjacent airflow guide groove 42 as the rotator 3 rotates. . Then, by introducing the airflow into the airflow introduction portion 4b at the workpiece removal target position, the airflow can be always concentrated in the airflow guide groove 42 at the workpiece removal target position.
According to the air blowing structure of the heat insulating material sorting apparatus 100 according to the eleventh embodiment, the air flow guide groove 42 serving as the air flow guide portion and the prime mover 40 are separated from each other, and the inner surface of the rotating body 3 is like the nozzle 41 described above. Since the parts fixed to the outside do not enter, the installation and maintenance of the rotating body 3 and the blower 4 are facilitated.

Embodiment 12 FIG.
In the example of the above-described eleventh embodiment, the use of the blower 4 in which the airflow guide groove 42 serving as the airflow guide portion is provided integrally with the rotating body 3 has been described. However, the airflow guide portion can be disposed on the inner peripheral side of the rotating body 3 without being fixed.
FIG. 15 is a configuration diagram showing the air blowing structure of the heat insulating material sorting apparatus 100 according to the twelfth embodiment, in which the airflow guide mechanism 33 held inside the rotating body 3 guides the airflow generated in the prime mover 40. It is configured to The airflow guide mechanism 33 is supported by a roller 33 a that rotates in contact with the inner peripheral surface of the rotating body 3, and always guides the airflow in the same direction regardless of the rotation of the rotating body 3.
The airflow guide mechanism 33 is formed in, for example, a cylindrical shape having a diameter smaller than the inner diameter of the rotating body 3, and an airflow guide groove 36 serving as an airflow passage is provided on the surface of the cylindrical shape.
Moreover, the both ends of the rotary body 3 are obstruct | occluded by the end surface part, for example, and the bearing structure is connected to the end surface part.

As shown in FIG. 15, the airflow guide mechanism 33 provided inside the rotator 3 is supported by a roller 33 a in the rotator 3, and is configured to freely roll on the inner peripheral surface. The airflow guide mechanism 33 has a center of gravity biased downward by a weight 35 or the like provided therein, and continues to face the same direction due to gravity even when the outer rotating body 3 rotates.
The airflow sent from the prime mover 40 passes through the hollow rotating shaft 34 (airflow passage) and is introduced into the airflow guide groove 36 through the airflow inlet at the center of the end surface on the airflow guide mechanism 33 side. Is done.
Thus, since the airflow guide mechanism 33 is always directed in the same direction due to the effect of the weight 35 and the roller 33a, the airflow sent from the prime mover 40 removes the workpiece regardless of the rotation of the rotating body 3. It can comprise so that it may blow out to the exterior from the predetermined rotation angle of the rotary body 3 to perform.

Here, the rotating shaft 34 supported by the bearing 31a is fixed to both end surface portions of the rotating body 3, and the rotating shaft 34 serving as one air flow path is connected to the prime mover 40 via the rotating joint 40a.
As shown in FIG. 15, since the rotating body 3 has a bilaterally symmetric support structure, the rigidity of the rotating mechanism unit including the rotating body 3 is improved as compared with that of a left-right asymmetric structure or a cantilever structure. Can be made. Therefore, according to this blower structure, the diameter of the rotating shaft 34 serving as the airflow passage is larger than that of the air shaft not including the airflow passage inside, but the rotating body 3 can obtain a stable driving state.

Embodiment 13 FIG.
In the heat insulating material sorting apparatus 100 including the blower 4 having the nozzle 41 according to the tenth embodiment described above, the example in which the rotating shaft 31 is used to support the rotating body 3 has been described. However, it is also possible to support the rotating body 3 without using the rotating shaft 31 and to feed airflow with the blower 4 having the nozzle 41.
FIG. 16 is a configuration diagram showing the air blowing structure of the heat insulating material sorting apparatus 100 according to Embodiment 13 of the present invention. The rotating body 3 has a cylindrical shape with open ends, and is provided at both ends of the cylindrical portion 30a. A ring-shaped portion 30 e that supports the rotating body 3 is provided, and the ring-shaped portion 30 e is supported by a roller 37.
And it has the structure by which the nozzle 41 of the air blower 4 was inserted into the inside from the edge part by which the rotary body 3 was open | released.

Here, as shown in FIG. 16, the roller 37 that supports the rotating body 3 is fixed to a roller support portion 38 that is assembled by a base, a support column, and the like. It can be set as the structure hold | maintained by the four rollers 37 surrounding at equal intervals.
Since the rotator 3 is rotatably held by the roller 37, the rotation of the roller 37 can be controlled by propagating the rotation drive of the roller 37 to the rotator 3 via the ring-shaped portion 30e. At this time, for example, by adding a configuration such as a groove (gear-shaped portion) that meshes with each other to the joint surface portion between the roller 37 and the ring-shaped portion 30e, the rotation of the roller 37 and the ring-shaped portion 30e is interlocked. Is possible.
Further, when a groove for engaging the ring-shaped portion 30e and the roller 37 is not provided, for example, the external rotary drive unit is directly attached to the rotary body 3 while the rotary body 3 is freely supported on the roller 37. The rotating body 3 can also be controlled to rotate by making contact with each other and propagating the conveyance driving force of the conveyance device 2 through the needle 3a.
Thus, even when the rotating shaft 31 is not used, the rotating body 3 can be driven and controlled by various driving methods.
The ring-shaped portion 30e can be omitted by forming the outer peripheral end portion of the cylindrical portion 30a into a shape that can be assembled with the roller 37.

  As described above, when the rotating body 3 has a structure having only the outer surface portion (cylindrical portion with both ends open) and is configured to be driven to rotate by the roller 37 or the like, the shaft portion such as the rotating shaft 31 is not provided. Thus, the end surface portion of the rotating body 3 is in a state of being greatly opened. Therefore, access when inserting the nozzle 41 into the rotating body 3 is facilitated, air flow controllability by adjusting the arrangement of the nozzle 41 is improved, and maintainability of the nozzle 41 can be improved. .

Embodiment 14 FIG.
Next, a heat insulating material sorting apparatus 100 according to Embodiment 14 of the present invention will be described with reference to FIG. FIG. 17 is a configuration diagram of a heat insulating material sorting apparatus 100 according to Embodiment 14 of the present invention, in which a friction charging device 51 that charges the heat insulating material before sorting positively or negatively and the cylindrical portion of the rotating body 3 are charged. A charging device 52 is provided. The friction charging device 51 and the charging device 52 are additionally provided in the above-described heat insulating material sorting device 100, thereby making it possible to increase the efficiency of heat insulating material sorting.

Some heat insulating materials have different charging characteristics depending on the material. For example, glass wool 9 has a characteristic of being easily charged positively (positive), and urethane (foamed urethane material 8) has a characteristic of being easily charged negatively (negatively).
Insulating material sorting apparatus 100 shown in the above-described Embodiments 1 to 8, 10 to 13 sorts only by mechanical characteristics such as whether or not the needle is easily removed from the needle or whether or not the hook of the needle is caught. In the fourteenth embodiment, a case where sorting is performed using the difference in charging characteristics depending on the material of the heat insulating material will be described.

  As shown in FIG. 17, in the heat insulating material sorting apparatus 100 according to the fourteenth embodiment, a frictional charging device 51 is arranged after the heat insulating material charging unit 1, and the heat insulating material to be sorted is frictionally charged according to its material. At the same time, the cylindrical portion from which the needle 3a of the rotating body 3 projects is charged by the charging device 52 to either plus or minus. In the example of FIG. 17, the urethane foam material 8 is negatively charged, the glass wool 9 is positively charged, and the rotating body 3 is positively charged.

According to this configuration, the mixed heat insulating material that has been made into small pieces before sorting is frictionally charged when charged into the friction charging device 51 from the heat insulating material charging unit 1 and stirred, and the first heat insulating material among the mixed heat insulating materials. Glass wool 9 as a material is positively charged, and urethane foam material 8 as a second heat insulating material is negatively charged.
The frictionally charged heat insulating material is stabbed into the needle 3a of the rotating body 3 and selected. At this time, since the rotating body 3 is positively charged by the charging device 52, a repulsive force is generated between the positively charged glass wool 9 and the rotating body 3 on the transport surface 2a. On the contrary, an attractive force is generated between the foamed urethane material 8 charged negatively and the rotating body 3.

  That is, due to the charging characteristics as described above, a force is generated between the glass wool 9 and the rotating body 3 in the direction in which the glass wool 9 comes out of the needle 3a, and the glass wool 9 is more likely to fall out of the needle 3a, and foaming occurs. A force is generated between the urethane material 8 and the rotating body 3 in a direction in which the foamed urethane material 8 is difficult to be removed from the needle 3a, and the foamed urethane material 8 is more easily held in a state of being stuck in the needle 3a. That is, this charging characteristic can further increase the difference in the ease of removal from the needle 3a between the urethane foam material 8 and the glass wool 9, thereby improving the sorting efficiency. The urethane foam material 8 is collected by the workpiece removal device 5 after the glass wool 9 is collected.

As described above, the heat insulating material sorting apparatus 100 according to the fourteenth embodiment of the present invention uses the charging characteristics depending on the material of the heat insulating material in addition to the mechanical characteristics such as whether the heat insulating material is easily removed from the needle 3a. Therefore, it becomes possible to more efficiently sort the heat insulating material by material.
Note that the frictional charging device 51 can be omitted when the heat insulating material is sufficiently frictionally charged during the transfer in the transfer facility of the factory.
In addition, the charge amount of the heat insulating material changes depending on the humidity during the heat insulating material transfer, but if the humidity is high, the humidity is adjusted by introducing dry air during the transfer, etc. By shifting to the processing, it becomes possible to effectively use the charging characteristics of the heat insulating material.

  It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

DESCRIPTION OF SYMBOLS 1 Thermal insulation input part, 2, 20 conveyance machine, 2a conveyance surface, 3 rotary body,
3a, 3b, 12a, 15a Needle, 4 Blower, 4b Airflow introduction part,
5 Work removal device, 6 Glass wool recovery part, 7 Urethane recovery part,
8 urethane foam, 9 glass wool, 10 scraped plate,
11 cylindrical guide plate, 12, 15, 16 belt, 13 support rotating shaft,
14 re-input part, 15b key claw, 16a scraper, 17 wind sorter,
18 heater, 21 suspension, 30 drive device, 30a cylindrical part,
30b end face part, 30c opening part, 30d end face opening part,
30e ring-shaped part, 31, 34 rotating shaft, 31a bearing,
33 Airflow guide mechanism, 33a, 37 rollers, 35 spindles,
36, 42 Airflow guide groove, 38 Roller support, 40 Motor,
40a rotary joint, 41 nozzle, 42a fin, 51 friction charging device,
52 Charging device, 100 Insulating material sorting device

The heat insulating material sorting apparatus according to the present invention is arranged on the transport surface of the transport machine, which transports the mixed heat insulating material mixed with a plurality of types of heat insulating materials placed on the transport surface and transported. A rotating body whose outer surface facing the conveying surface rotates in synchronization with the conveying speed of the conveying surface, protrudes from the outer surface of the rotating body, and is mixed with the rotating body and the mixed heat insulating material. The needle that stabs the mixed heat insulating material regardless of the type of the mixed heat insulating material as the distance from the heat insulating material becomes gradually smaller , and the first heat insulating material that is easy to come off from the needle is recovered from the mixed heat insulating material. And a second recovery part for recovering the second heat insulating material that is difficult to be removed from the needle.
Further, the heat insulating material sorting apparatus according to the present invention includes a conveying machine for placing and conveying a mixed heat insulating material mixed with a plurality of types of heat insulating materials on the conveying surface, and on the conveying surface of the conveying machine. A rotating body whose outer surface opposite to the conveying surface rotates, a needle protruding from the outer surface of the rotating body and piercing the mixed heat insulating material ; A friction charging device for charging the mixed heat insulating material and a rotating body positively or negatively provided with a first collecting portion for collecting the heat insulating material and a second collecting portion for collecting the second heat insulating material that is difficult to be removed from the needle. Any one of the above is provided with a charging device for charging .

The method for selecting a heat insulating material according to the present invention includes a step of inserting a needle into the first and second heat insulating materials that have been fragmented, the first heat insulating material that is easily removed from the needle that is inserted into the needle, and the needle. The first heat insulating material is removed from the needle by applying a force such that the first heat insulating material is removed from the needle and the second heat insulating material is not removed from the second heat insulating material, which is difficult to come off. It includes a second sorting step of removing the second heat insulating material from the needle through the first sorting step to be removed and the first sorting step .

Thus, the blower 4, the prime mover 40 to generate an air stream, is connected to the prime mover 40 of that, the air flow was guided to the inside of the rotor 3, by constituting a nozzle 41 to discharge outwardly from the cylindrical surface Only the nozzle 41 is arranged in the rotating body 3, and the prime mover 40 can be arranged outside the rotating body 3. The prime mover 40 can also be omitted by replacing it with a mechanism capable of generating an airflow, for example, a configuration for sending compressed air from a factory to the nozzle 41.
As a result, the prime mover 40 is not disposed inside the rotator 3, and only the airflow guide structure (nozzle 41) is inserted, so the size of the rotator 3 to be used is small regardless of the size of the prime mover. Can be realized.

Here, as shown in FIG. 16, the roller 37 that supports the rotating body 3 is fixed to a roller support portion 38 that is assembled by a base, a support column, and the like. It can be set as the structure hold | maintained by the four rollers 37 surrounding at equal intervals.
Rotor 3 is to be rotatably held by the roller 37, the rotation of the roller 37, by propagated to the rotating body 3 through the ring-shaped portion 30e, it is possible to control the rotation. At this time, for example, by adding a configuration such as a groove (gear-shaped portion) that meshes with each other to the joint surface portion between the roller 37 and the ring-shaped portion 30e, the rotation of the roller 37 and the ring-shaped portion 30e is interlocked. Is possible.
Further, when a groove for engaging the ring-shaped portion 30e and the roller 37 is not provided, for example, the external rotary drive unit is directly attached to the rotary body 3 while the rotary body 3 is freely supported on the roller 37. The rotating body 3 can also be controlled to rotate by making contact with each other and propagating the conveyance driving force of the conveyance device 2 through the needle 3a.
Thus, even when the rotating shaft 31 is not used, the rotating body 3 can be driven and controlled by various driving methods.
The ring-shaped portion 30e can be omitted by forming the outer peripheral end portion of the cylindrical portion 30a into a shape that can be assembled with the roller 37.

Claims (27)

A transporter that transports a mixed heat insulating material mixed with a plurality of types of heat insulating materials placed on the transport surface,
A rotating body that is disposed on the transport surface of the transport machine, and whose outer surface facing the transport surface rotates;
A needle protruding from the outer surface of the rotating body and piercing the mixed heat insulating material;
Of the mixed heat insulating material, a first recovery part for recovering the first heat insulating material that is easily removed from the needle,
A heat insulating material sorting apparatus comprising a second collecting portion for collecting the second heat insulating material which is difficult to be removed from the needle. The rotating body has a cylindrical shape,
The heat insulating material sorting apparatus according to claim 1, wherein the axis of the rotating body is disposed so as to be parallel to the transport surface of the transport machine and to intersect the transport direction.   The heat insulating material sorting apparatus according to claim 2, wherein the shaft of the rotating body is disposed so as to be orthogonal to a transport direction of the transport machine.   The heat insulating material according to any one of claims 1 to 3, wherein the first heat insulating material is recovered in a range from the lowermost part of the rotating body to the rotating body rotating 90 degrees. Sorting device. The rotating body rotates with the inner periphery of the rotating body in contact with the outer periphery of a plurality of support rotating shafts,
2. The heat insulating material according to claim 1, wherein the plurality of support rotation shafts are arranged in parallel to each other, and are arranged so as to be parallel to the conveyance surface of the conveyance machine and intersect the conveyance direction. Sorting device.   6. The heat insulating material sorting apparatus according to claim 1, wherein the needle has a linear shape and a tapered shape.   The insulating material according to any one of claims 1 to 6, further comprising a blower that blows air in a direction in which the first heat insulating material or the second heat insulating material is detached from the needle. apparatus.   8. The heat insulating material sorting apparatus according to claim 7, wherein the blower is disposed inside the rotating body. The blower includes a prime mover that generates airflow,
8. The heat insulating material sorting apparatus according to claim 7, wherein the prime mover is disposed outside the rotating body, and an air flow sent from the prime mover is guided to the inside of the rotating body. The rotating shaft of the rotating body having a cylindrical shape is fixed to one closed end surface portion of the rotating body,
The blower includes a nozzle that is connected to the prime mover and guides an airflow sent from the prime mover.
10. The heat insulating material sorting apparatus according to claim 9, wherein the nozzle is inserted into the rotary body from the released other end of the rotary body. An end surface opening for introducing the airflow generated in the prime mover into the inside of the rotating body is formed in one end surface portion of the rotating body having a cylindrical shape,
The sorting apparatus according to claim 9, wherein an airflow guide groove for guiding an airflow introduced from the end face opening is provided on an inner peripheral side of the rotating body.   An airflow guide mechanism that is disposed inside the rotating body and guides the airflow generated in the prime mover is supported by a roller that rotates in contact with the inner peripheral surface of the rotating body, and is independent of the rotation of the rotating body. The sorting apparatus according to claim 9, wherein the airflow is always guided in the same direction.   The cylindrical rotating body with an open end has a structure in which the outer surface of the rotating body is supported by a roller, and air generated in the prime mover is generated from the released end of the rotating body to the inside. 10. A heat insulating material sorting apparatus according to claim 9, wherein a guiding nozzle is inserted.   The heat insulating material according to any one of claims 1 to 13, further comprising: a friction charging device that charges the mixed heat insulating material; and a charging device that charges the rotating body positively or negatively. Sorting device.   The heat insulating material sorting apparatus according to any one of claims 1 to 6, further comprising a drive unit that vibrates the rotating body.   A guide plate is provided on the outside of the rotating body, contacts the second heat insulating material stuck in the needle, and moves the second heat insulating material from the root of the needle toward the tip. The heat-insulating material sorting apparatus according to any one of claims 1 to 15.   17. The heat insulating material sorting apparatus according to claim 16, wherein the guide plate has a cylindrical shape, is provided with a slit through which the needle passes, and is arranged eccentrically with respect to the axis of the rotating body.   The said 1st collection | recovery part collect | recovers said 1st heat insulation materials which fell from the said needle | hook, The insulating material screening device as described in any one of Claim 1 to 17 characterized by the above-mentioned. The rotating body includes a first rotating body with a large interval between the needles arranged on the outer surface and a second rotating body with a small interval between the needles,
The first rotating body is disposed on the upstream side of the transporter, and the second rotating body is disposed on the downstream side of the transporter. Insulation material sorting equipment.   The heat insulation according to any one of claims 1 to 19, further comprising a re-input portion for returning the first or second heat insulating material that has not been stuck to the needle from the downstream side to the upstream side of the transporter. Material sorting device. A transporter that transports a mixed heat insulating material mixed with a plurality of types of heat insulating materials placed on the transport surface,
A rotating body that is disposed on the transport surface of the transport machine, and whose outer surface facing the transport surface rotates;
A needle that protrudes from the outer surface of the rotating body and pierces the mixed heat insulating material, with a key claw at the tip,
Of the mixed heat insulating material, a first recovery unit for recovering the first heat insulating material caught on the key claw of the needle,
A heat-insulating material sorting apparatus comprising a second collecting portion for collecting the second heat-insulating material that is not caught by the key claws of the needle. The first heat insulating material recovered in the first recovery part includes an aggregate of fibrous substances as a main constituent material,
22. The heat insulating material sorting according to claim 1, wherein the second heat insulating material recovered in the second recovery portion includes an integrally formed foamed resin as a main constituent material. apparatus. Said 1st heat insulation material collect | recovered in said 1st collection part contains glass wool as a main component,
The heat insulating material sorting apparatus according to any one of claims 1 to 22, wherein the second heat insulating material recovered in the second recovery portion includes urethane foam as a main constituent material. A step of inserting a needle into the first and second heat insulating materials,
In contrast to the first heat insulating material that is easily removed from the needle stuck in the needle and the second heat insulating material that is difficult to come off from the needle, the first heat insulating material is detached from the needle, and the second heat insulating material. A first selection step of removing the first heat insulating material from the needle by applying a force that does not come off.
A method of selecting a heat insulating material, comprising a second selecting step of removing the second heat insulating material in a state of being stuck in the needle through the first selecting step from the needle. A step of piercing a needle having a key claw into the first and second heat insulating materials that are placed and transported on a transport machine;
Of the first and second heat insulating materials, the first selection step of recovering the first heat insulating material caught on the key claws by removing it from the key claws,
A method for selecting a heat insulating material, comprising a second selection step of collecting the second heat insulating material that is not caught by the key claws. The first heat insulating material selected in the first selection step is composed of an aggregate of fibrous substances,
26. The method for selecting a heat insulating material according to claim 24, wherein the second heat insulating material selected in the second selecting step is made of a foamed resin having an integral structure. The first heat insulating material selected in the first selection step includes glass wool as a main constituent material,
26. The method for selecting a heat insulating material according to claim 24, wherein the second heat insulating material selected in the second selecting step includes urethane foam as a main constituent material.

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