JP2011136758A - Tray for packing honeycomb structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tray for packing a honeycomb structure, which can effectively prevent the honeycomb structure from being damaged by vibrations during transportation, and which enables the honeycomb structure to be inexpensively packed with proper workability without use of a large number of members. <P>SOLUTION: This tray 1 for packing the honeycomb structure, which is used when the plurality of columnar honeycomb structures are collectively packed, includes: a plurality of tray-like sheets 3 which are made of a material setting compressive strength at a distortion of 10% in the range of 0.1-110 kPa, and which have recesses 5 for fitting an end of the honeycomb structure; and a base 7 which presents a plate shape, and which has at least one side thereof provided with a plurality of recesses for fitting the sheet 3. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a honeycomb structure packaging tray used for supporting and fixing the honeycomb structure when the plurality of honeycomb structures are packed together.

  Columnar honeycomb structures are used as catalysts and filters for purifying automobile exhaust gas. When such a honeycomb structure is shipped as a product, it is packaged so that it can be easily transported and stored without being damaged.

  Conventionally, as a packing body for packing a honeycomb structure, a tray having a plate shape and having a plurality of recesses (pockets) for accommodating end portions of the honeycomb structure as shown in Patent Document 1 is provided. Things are known. The tray having such a structure is arranged above and below the honeycomb structure, and the upper end and the lower end of the honeycomb structure are respectively accommodated in the recesses of the tray. Is supported and fixed.

  By the way, in the tray used in such a conventional packing body for a honeycomb structure, a plurality of concave portions that accommodate the end portions of the honeycomb structure and a base portion that connects the concave portions are integrated with the same material. In general, a plastic material is used as the constituent material in consideration of the rigidity of the entire tray.

  The diameter of the concave portion of the tray is set to have a certain margin with respect to the diameter of the end portion of the honeycomb structure so that the end portion of the honeycomb structure can be easily accommodated during the packing operation. If there is a difference between the diameter and the diameter of the end of the honeycomb structure, and the clearance between the inner peripheral surface of the concave portion of the tray and the outer peripheral surface of the end of the honeycomb structure accommodated in the concave portion is large, The structure is easy to move and damage is likely to occur.

  Specifically, the honeycomb structure moves in the vertical direction or the horizontal direction due to vibration during transportation, and the outer peripheral portion of the end face of the honeycomb structure housed in the recess of the tray collides with the inner bottom surface of the recess during vertical movement. In addition, when the honeycomb structure is moved in the horizontal direction, the outer peripheral portion of the end face of the honeycomb structure hits the inner peripheral surface of the concave portion, and chipping occurs. Similarly, due to vibration during transportation, the honeycomb structure rotates about its axis, and at that time, the outer peripheral portion of the end face of the honeycomb structure housed in the concave portion of the tray and the inner peripheral surface of the concave portion of the tray are rubbed, Scraping occurs.

  Moreover, since the conventional packing body disclosed by patent document 1 uses a shallow box-shaped tray pack, a protection member, etc. other than a tray, while the cost which packing requires becomes high, the man-hour of a packing operation also increases. There is also a problem.

International Publication No. 2008/093631 Pamphlet

  The present invention has been made in view of such conventional circumstances. The object of the present invention is to effectively prevent damage to the honeycomb structure due to vibration during transportation and to use many members. An object of the present invention is to provide a honeycomb structure packaging tray capable of packing a honeycomb structure with good workability at low cost.

  In order to achieve the above object, according to the present invention, the following honeycomb structure packaging tray is provided.

[1] A honeycomb structure packaging tray for use in packing a plurality of columnar honeycomb structures together, which is made of a material having a compressive strength at 10% strain of 0.1 to 110 kPa. A tray for packing a honeycomb structure, comprising: a plurality of dish-like sheets having recesses into which end portions of the body are fitted; and a base having a plate shape and having a plurality of recesses to which the sheets are fitted on at least one side thereof.

[2] The honeycomb structure packaging tray according to [1], wherein the base includes a plurality of recesses into which the sheet is fitted on both sides thereof.

[3] A material having a friction coefficient of 0.30 to 1.00 with respect to the end face of the honeycomb structure having a mass of 1.45 kg and an end face area excluding an end face opening of the cell of 0.008 m ² as the sheet. The honeycomb structure packing tray according to [1] or [2], wherein the honeycomb structure packing tray is used.

[4] The honeycomb structure packaging tray according to any one of [1] to [3], wherein the sheet is made of any one material selected from the group consisting of foamed resin, rubber, and pulp.

[5] The honeycomb structure packaging according to any one of [1] to [4], wherein the base is made of any one material selected from the group consisting of corrugated cardboard, rubber, plastic, wood, and metal. Tray.

  The tray for packing a honeycomb structure of the present invention is not an integrally formed product made entirely of the same material, but a dish-like sheet having a recess into which an end of the honeycomb structure is fitted, and the sheet is mounted. This is a composite tray composed of a composite plate-like base, and is a flexible material such as a foam material having a specific compressive strength as a constituent material of the sheet that directly contacts the honeycomb structure, and preferably has a large coefficient of friction. Material is used. Therefore, due to vibration during transportation, the honeycomb structure moves in the vertical and horizontal directions or rotates around the axis, so that the outer peripheral portion of the end surface of the honeycomb structure housed in the concave portion of the sheet Even if it hits the inner bottom surface or the inner peripheral surface of the concave portion or rubs against the inner peripheral surface of the concave portion of the sheet, damage such as chipping or scraping hardly occurs.

  In addition, since the sheet is flexible and can be easily deformed, the end of the honeycomb structure easily fits in the recess of the sheet even if there is almost no difference between the diameter of the recess of the sheet and the diameter of the end of the honeycomb structure. Therefore, it becomes possible to make the clearance between the inner peripheral surface of the concave portion of the sheet and the outer peripheral surface of the end portion of the honeycomb structure housed in the concave portion substantially zero, thereby absorbing vibration during transportation by the sheet, It can be mitigated and the movement and rotation itself of the honeycomb structure due to vibration can be suppressed, and damage such as chipping or shaving is unlikely to occur.

  Further, since the sheet is flexible and easily deformable, the end of the honeycomb structure can sink into the sheet, thereby suppressing the movement and rotation of the honeycomb structure due to vibration itself, and lacking the chip. Damage such as scraping and scraping is unlikely to occur.

  In addition, as a preferable aspect, since a material having a large friction coefficient is used as a constituent material of the sheet, movement and rotation of the honeycomb structure due to vibration can be further suppressed, and damage such as chipping and scraping is further reduced. Less likely to occur.

  Further, the packing of the honeycomb structure can basically be performed only with the honeycomb structure packing tray of the present invention, and since many members are not required for the packing, the cost of the material required for the packing is suppressed. Further, the number of man-hours for packing work can be reduced. If necessary, the honeycomb structure packed using the honeycomb structure packing tray of the present invention is further accommodated in an outer box, or the honeycomb structure is packed using the honeycomb structure packing tray of the present invention. Wrap around the body with a film to firmly fix the steps in the honeycomb structure and tray stacked in multiple stages, and firmly fix the honeycomb structure and tray to the pallet used as a base for packing It can also be made.

  Further, as described above, the sheet and the base constituting the honeycomb structure packaging tray of the present invention are not integrally formed, and a flexible material having a predetermined compressive strength is in direct contact with the honeycomb structure. Since it is used only for the sheet to be used, the necessary rigidity can be ensured for the entire tray.

It is a perspective view which shows an example of embodiment of the tray for honeycomb structure packing of this invention. It is an AA cross-sectional schematic diagram of FIG. It is a perspective view which shows an example of the sheet | seat which comprises the tray for honeycomb structure packing of this invention. It is a perspective view which shows an example of the base which comprises the tray for honeycomb structure packing of this invention. It is a schematic sectional drawing which shows the state which packed the honeycomb structure using the honeycomb structure packaging tray of this invention. It is a schematic sectional drawing which shows an example of the sheet | seat which comprises the tray for honeycomb structure packing of this invention. It is a schematic sectional drawing which shows an example of the sheet | seat which comprises the tray for honeycomb structure packing of this invention. It is a schematic sectional drawing which shows an example of the sheet | seat which comprises the tray for honeycomb structure packing of this invention. It is a schematic sectional drawing which shows an example of the sheet | seat which comprises the tray for honeycomb structure packing of this invention. It is a schematic sectional drawing which shows an example of the sheet | seat which comprises the tray for honeycomb structure packing of this invention. It is a disassembled perspective view which shows an example of the production method of the base which comprises the tray for honeycomb structure packing of this invention. It is sectional drawing of the base produced by laminating | stacking a several corrugated board.

  Hereinafter, the present invention will be described based on specific embodiments, but the present invention should not be construed as being limited thereto, and based on the knowledge of those skilled in the art without departing from the scope of the present invention. Various changes, modifications, and improvements can be added.

  FIG. 1 is a perspective view showing an example of an embodiment of a tray for packing a honeycomb structure of the present invention, and FIG. 2 is a schematic cross-sectional view taken along line AA of FIG. FIG. 3 is a perspective view showing an example of a sheet constituting the honeycomb structure packaging tray of the present invention, and FIG. 4 is a perspective view showing an example of a base constituting the honeycomb structure packaging tray of the present invention. FIG. 5 is a schematic sectional view showing a state in which the honeycomb structure is packed using the honeycomb structure packing tray of the present invention.

  A honeycomb structure packaging tray 1 according to the present invention has a plurality of dish-like sheets 3 having recesses 5 into which end portions of a honeycomb structure, which is a packaged body, are fitted, and a plate shape. And a base 7 having a plurality of recesses 9 into which 3 is fitted. In the example of FIG. 2, the recesses 9 are provided on both surfaces of the base 7, and the sheets 3 are respectively fitted in the recesses 9 on both surfaces. However, as described later, when packing the honeycomb structure, In addition, depending on the position at which the honeycomb structure packaging tray 1 is disposed, the sheet 3 may be fitted only in the concave portion 9 on one side of the base 7 or the concave portion 9 itself may be provided only on one side of the base 7. is there.

  In the honeycomb structure packaging tray 1 of the present invention, the dish-shaped sheet 3 is a member that directly contacts the end of the honeycomb structure 11 fitted (accommodated) in the recess 5 when the honeycomb structure is packed. . In the present invention, a material having a compressive strength at 10% strain of 0.1 to 110 kPa, preferably 1 to 50 kPa is used as a constituent material of the sheet 3.

  Here, the measurement of “compressive strength at 10% strain” in the present invention is carried out by applying a sample having a thickness of 3 mm to a compression tester specified in JIS B 7733 and performing a compression stress test based on ISO 3386-1. be able to.

  When a flexible material having such compressive strength is used as a constituent material of the sheet 3 that is in direct contact with the end portion of the honeycomb structure 11, the sheet 3 exhibits a cushioning effect, and the honeycomb structure 11 is subjected to vibration during transportation. Moves in the vertical or horizontal direction or rotates around the axis, and the outer peripheral portion of the end face of the honeycomb structure housed in the concave portion 5 of the sheet 3 hits the inner bottom surface or inner peripheral surface of the concave portion 5. Even if it rubs against the inner peripheral surface of the recess 5, damage such as chipping or shaving is unlikely to occur.

  In addition, since the sheet 3 made of such a flexible material can be easily deformed, even when there is almost no difference between the diameter of the concave portion 5 of the sheet 3 and the diameter of the end portion of the honeycomb structure 11, The end portion of the honeycomb structure 11 is easy to fit in the recess 5. Therefore, the clearance between the inner peripheral surface of the concave portion 5 of the sheet 3 and the outer peripheral surface of the end portion of the honeycomb structure 11 accommodated in the concave portion 5 can be made substantially zero, thereby reducing vibration during transportation. It can be absorbed and relaxed by the sheet, and the movement and rotation of the honeycomb structure itself due to vibration can be suppressed, and damage such as chipping and scraping hardly occurs.

  The diameter of the concave portion 5 of the sheet 3 is preferably in a range from a diameter that is 1 mm smaller to a diameter that is 2 mm larger than the diameter of the end of the honeycomb structure 11 to be packed. Due to the flexibility of the sheet 3, the end of the honeycomb structure 11 can be accommodated in the recess 5 of the sheet 3 even if the diameter of the recess 5 of the sheet 3 is slightly smaller than the diameter of the end of the honeycomb structure 11. However, if the diameter of the concave portion 5 of the sheet 3 is so small that it exceeds 1 mm with respect to the diameter of the end portion of the honeycomb structure 11 to be packed, the end portion of the honeycomb structure 11 is inserted into the concave portion 5 or the concave portion 5. It may interfere with the removal from the unit. In addition, if the diameter of the concave portion 5 of the sheet 3 is larger than the diameter of the end of the honeycomb structure 11 to be packed, the honeycomb structure 11 moves due to vibration during transportation and is damaged. There is a case.

  Further, since the sheet 3 made of such a flexible material can be easily deformed, the end portion of the honeycomb structure 11 can sink into the sheet 3, and thereby the honeycomb structure by vibration can be reduced. Movement and rotation itself can be suppressed, and damage such as chipping or shaving is unlikely to occur.

  If the compressive strength at 10% strain of the constituent material of the sheet 3 is less than 0.1 kPa, the sheet is too soft and it becomes difficult to stably hold the honeycomb structure 11, and if it exceeds 110 kPa, the sheet 3 is insufficient, and it becomes difficult to sufficiently prevent the honeycomb structure 11 from being damaged.

In addition to having a predetermined compressive strength as described above, the constituent material of the sheet 3 is preferably a honeycomb having a mass of 1.45 kg and an end surface area of 0.008 m ² excluding cell end surface openings. The coefficient of friction with the end face of the structure is 0.30 to 1.00, more preferably, the coefficient of friction with the end face of the honeycomb structure having the mass and the end face area is 0.50 to 0.80. Use materials.

Here, the “friction coefficient” in the present invention can be measured by a friction coefficient test. Specifically, a sheet having an area of 0.16 m ² is placed and fixed on an inclined table, and further, the mass is 1.45 kg, and the end surface area excluding the end face opening of the cell is 0.008 m ² . With the honeycomb structure placed with its end face in contact with the sheet, the tilt base is tilted, and the tilt angle (θ) of the tilt base when the honeycomb structure starts to slide is measured. Then, from the obtained θ, the friction coefficient is obtained by the following equation (1).
Friction coefficient = tan θ (1)

  If the sheet 3 made of a material having such a large friction coefficient is used, the movement and rotation of the honeycomb structure 11 due to vibration can be further suppressed, and damage such as chipping and scraping is less likely to occur.

  When the friction coefficient between the sheet 3 and the end face of the honeycomb structure having the mass and the end face area as described above is less than 0.30, the honeycomb structure 11 to be packaged easily slides on the sheet 3, and the honeycomb structure 11 In some cases, it may be difficult to sufficiently prevent damage. On the other hand, if the friction coefficient is excessively large, there is a risk that the end face of the honeycomb structure 11 may be damaged.

  Specific examples of the constituent material of the sheet 3 that can have the compressive strength and the friction coefficient as described above include foamed resin, rubber, and pulp, and particularly foamed polystyrene, foamed polyethylene, foamed polypropylene, foamed polyurethane, and the like. Resins are preferred because of their good processability.

  As a method for producing the sheet 3 made of such a material, for example, a molding method such as foam molding or vacuum molding may be mentioned as a suitable method.

  In order to sufficiently exhibit the cushioning effect of the sheet 3, the thickness of the sheet 3 is preferably about 1 to 10 mm. Further, the height of the sheet 3 is equal to or greater than the thickness of the base 5 so that the opening end of the sheet 3 protrudes from the surface of the base 7 to some extent when the sheet 3 is fitted in the recess 9 of the base 7. It is preferable to set the height. Basically, the shape of the sheet 3 may be a shape in which the recess 5 into which the end of the honeycomb structure 11 is fitted is formed by the bottom surface and the side surface as shown in FIG. In order to facilitate the work of attaching the seat 3 to the base 7 or removing it from the base 7, as shown in FIG. An overhanging flange 4 may be provided. Further, as shown in FIG. 6, the side surface may be formed perpendicular to the bottom surface, but in order to make it easier to accommodate the end portion of the honeycomb structure 11 in the concave portion 5 during packaging, FIGS. As shown, the side surface may have a shape that expands in a taper shape or a trumpet shape toward the side opposite to the bottom surface. In the case of a taper shape, it is preferable that the side surface forms an angle of about 3 to 30 ° with respect to a line perpendicular to the bottom surface. Moreover, as shown in FIG. 6, the bottom surface and the side surface may be connected with a corner, and as shown in FIG. 10, the bottom surface and the side surface are continuously connected with roundness. Also good.

  In the honeycomb structure packaging tray 1 of the present invention, the base 7 has a plurality of recesses 9 for determining the position of the sheet 3 and suppressing movement (displacement) of the sheet 3. 3 is fitted. The diameter of the concave portion 9 of the base 7 is preferably in a range from a diameter that is 1 mm smaller to a diameter that is 2 mm larger than the outer diameter of the portion fitted into the concave portion 9 of the sheet 3. Due to the flexibility of the sheet 3, it is possible to fit the sheet 3 into the recess 9 even if the diameter of the recess 9 of the base 7 is slightly smaller than the outer diameter of the portion fitted into the recess 9 of the sheet 3. However, if the diameter of the concave portion 9 of the base 7 is so small as to exceed 1 mm with respect to the outer diameter of the portion fitted to the concave portion 9 of the sheet 3, the fitting of the sheet 3 to the concave portion 9 and the removal from the concave portion 9 are performed. May cause trouble. Further, if the diameter of the concave portion 9 of the base 7 is larger than 2 mm with respect to the outer diameter of the portion fitted into the concave portion 9 of the sheet 3, the sheet 3 may be displaced. Note that the sheet 3 can be easily detached from the base 7 and difficult to handle by simply fitting the sheet 3 into the recess 9, and therefore, the sheet 3 and the base 7 are preferably bonded using a double-sided tape, an adhesive, or the like.

  The base 7 needs to be made of a material having a certain degree of rigidity so as not to hinder the work when packing using the honeycomb structure packing tray 1 of the present invention. Specific examples of the constituent material of the base 7 having such rigidity include, for example, cardboard, rubber, plastic (polystyrene, polyethylene, polypropylene, polyethylene terephthalate, polyvinyl chloride, etc.), wood, and metal (iron, aluminum, etc.). In particular, corrugated cardboard is preferable because it is inexpensive and the base 7 can be easily manufactured.

  FIG. 11 is an exploded perspective view showing an example of a manufacturing method of the base 7 and showing a manufacturing method using cardboard. When the base 7 is manufactured using corrugated cardboard, first, three corrugated cardboard plates having the same size are prepared, and a plurality of through holes are provided in the same arrangement on two of them. Next, as shown in FIG. 11, between the two cardboard plates 13 and 17 provided with the through holes 19, the remaining cardboard plates 15 not provided with the through holes are arranged, and these three cardboard plates 13 are disposed. , 15, 17 are bonded together. FIG. 12 is a schematic cross-sectional view of the base 7 manufactured in this way. The concave portion 9 of the base 7 is formed by the through hole 19 of the corrugated board 13, 17 and the surface of the corrugated board 15 exposed in the through hole 19. Is formed. Thus, if the method of laminating a plurality of corrugated cardboard plates is used, the base 7 can be easily manufactured at a very low cost.

  The honeycomb structure packaging tray 1 according to the present invention is not an integrally formed product composed entirely of the same material, but a composite tray configured by combining the sheet 3 and the base 7 as described above. A flexible material having compressive strength is used only for the sheet 3 that is in direct contact with the honeycomb structure 11, and the base 7 is made of another material having a certain rigidity, thereby preventing damage to the honeycomb structure 11. The necessary rigidity for the entire tray can be ensured. When the entire tray is made of a flexible material such as the foamed resin used for the sheet 3 of the honeycomb structure packaging tray 1 of the present invention, for example, the necessary rigidity as the entire tray cannot be secured, The packaging work is hindered, and a large amount of expensive foamed resin is used, which increases the material cost.

  As shown in FIG. 5, the honeycomb structure 11 is packed using the honeycomb structure packing tray 1 of the present invention by alternately arranging the honeycomb structure packing tray 1 and the honeycomb structure 11 to have a desired number of stages. It is made by stacking. FIG. 5 shows an example of packing in which the honeycomb structures 11 are stacked in four stages using the five honeycomb structure packing trays 1a to 1e, but the honeycomb structures mounted on each stage are shown. There is no particular limitation on the number of the stacked honeycomb structures and the number of stacked honeycomb structures. For example, only two trays for packing the honeycomb structures of the present invention are used, and the honeycomb structures are sandwiched between the two trays. Thus, it is naturally possible to pack the honeycomb structure in only one stage.

  As an example of a specific packing procedure, first, a pallet 21 having the same size as the honeycomb structure packing tray 1 is prepared so that the entire packing body can be moved by a forklift or the like after packing. Next, the lowermost honeycomb structure packaging tray 1 a is placed on the pallet 21. Then, the honeycomb structure 11 is placed so that the lower end portion of the honeycomb structure 11 is fitted into the concave portion 5 of each sheet 3 of the bottommost honeycomb structure packaging tray 1a. Next, the honeycomb structure packaging tray 1b is placed in the concave portion 5 of the sheet 3 on the lower surface side so that the upper end portion of the honeycomb structure 11 is fitted. Thereafter, the honeycomb structure 11 and the structure packing trays 1c, 1d, and 1e are alternately stacked in the same procedure, and the honeycomb structure 11 is packed in a desired number of stages (four in the example of FIG. 5). Get the package.

  Note that the honeycomb structure packaging tray 1a disposed at the bottom and the honeycomb structure packaging tray 1e disposed at the top are in contact with the honeycomb structure 11 only on one side. The sheet 3 is fitted only in the concave portion 9 present on the one side. Since the other honeycomb structure packaging trays 1b, 1c, and 1d are in contact with the honeycomb structure 11 on both sides, the sheet 3 is fitted in the recesses 9 existing on both sides of the base 7. . Further, for the honeycomb structure packing tray 1a disposed at the lowermost stage and the honeycomb structure packing tray 1e disposed at the uppermost position, it is necessary to provide the recess 9 on the surface not in contact with the honeycomb structure 11 However, from the viewpoint of strength, it is preferable not to provide it, but from the standpoint of providing versatility that unifies the form of the tray and can be used at any position other than the bottom or top level. 7 is preferably provided with recesses 9 on both sides.

  The packing of the honeycomb structure 11 using the honeycomb structure packing tray 1 of the present invention is basically possible only with the honeycomb structure packing tray 1 of the present invention, and many members are required for packing. Therefore, it is possible to reduce the cost required for packing and reduce the man-hours for packing work. If necessary, the honeycomb structure packed using the honeycomb structure packing tray of the present invention is further accommodated in an outer box made of cardboard or the like, or packed using the honeycomb structure packing tray of the present invention. The periphery of the honeycomb structure is wound with a film, and the honeycomb structures and trays stacked in multiple stages are fixed to each other, the honeycomb structure and the tray, and the pallet used as a base for packing Fixing can be strengthened.

  INDUSTRIAL APPLICABILITY The present invention is suitably used as a means for packing a ceramic honeycomb structure used as a catalyst or filter for purifying automobile exhaust gas for storage or transportation.

1: honeycomb structure packing tray, 3: sheet, 4: flange, 5: recess, 7: base, 9: recess, 11: honeycomb structure, 13: corrugated board, 15: corrugated board, 17: corrugated board , 19: through hole, 21: pallet.

Claims (5)

A honeycomb structure packaging tray used when packing a plurality of columnar honeycomb structures together,
Composed of a material having a compressive strength of 0.1 to 110 kPa at 10% strain, a plurality of dish-like sheets having recesses into which the ends of the honeycomb structure are fitted, and a plate shape, at least on one side thereof A honeycomb structure packaging tray comprising a base having a plurality of recesses into which a sheet is fitted.   The honeycomb structure packaging tray according to claim 1, wherein the base has a plurality of concave portions into which the sheet is fitted on both sides thereof. The sheet is made of a material having a friction coefficient of 0.30 to 1.00 with the end face of the honeycomb structure having a mass of 1.45 kg and an end face area excluding the opening on the end face of the cell of 0.008 m ^2. The honeycomb structure packaging tray according to claim 1 or 2, wherein the honeycomb structure is used.   The honeycomb structure packaging tray according to any one of claims 1 to 3, wherein the sheet is made of any one material selected from the group consisting of foamed resin, rubber, and pulp.   The tray for packing a honeycomb structure according to any one of claims 1 to 4, wherein the base is made of any one material selected from the group consisting of corrugated cardboard, rubber, plastic, wood, and metal.

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