JP4957533B2 - Roll holder - Google Patents

Description

  The present invention relates to a roll receiver that can be suitably used when a roll formed by winding a long band-like object or a long string-like object around a core is transported or stored.

  Long strips such as sheets and films, and long strings such as threads and ropes should be made of paper, synthetic resin or glass so that they are not bulky during transportation or storage. In many cases, it is wound around a tubular core made of fiber reinforced plastic (FRP) or metal and handled as a roll. As a method for transporting and storing such a roll, there are a method of placing the roll on a backing material laid on a pallet, and a method of receiving the both ends of the core and suspending and supporting the roll.

  The latter method consists of a square or rectangular plate-like member having a plane having a size larger than the diameter of the roll, and is provided with a circular opening at the center, or a U shape or flask shape extending from one side to the center. A pair of roll receivers provided with a plurality of openings, and a method of fitting and placing the end portions of the core directly projecting outside both ends of the rolls into the opening portions of the roll receiver, Insert a cylindrical connector into the opening of the receiver, insert the ends of the connector protruding from the roll receiver into the cores at both ends of the roll, and place it on the roll receiver. There is a method in which a cylindrical plug made of the same material is integrally provided, and the plug is inserted into the cores at both ends of the roll and placed indirectly. As the material of the roll holder, woody materials such as wood and plywood have been used most widely since ancient times, and metal materials such as cast iron and aluminum are common for heavy rolls, but in recent years, A material made of a synthetic resin material such as an ABS resin, a polypropylene-based resin, and an impact-resistant polystyrene resin (HIPS) having a rib structure on the back surface is also widespread.

  As the roll holder made of the synthetic resin material, for example, a reinforcing rib 102 is provided on one side surface of a plate-like substrate portion 101 like the roll holder 100 shown in FIG. 9 or the roll holder 100A shown in FIG. A configuration is adopted in which a set pattern is formed in a protruding shape, and a plurality of bottomed recesses 103 are formed by the substrate 101 and the reinforcing ribs 102. As shown in FIG. 9, when the roll 110 is suspended and supported using the roll receiver 100, a pair of roll receivers 100 are arranged on both sides of the roll 110, The ends of the core 111 are fitted and placed in the U-shaped opening 104 extending to the center, and the roll 110 is supported by the binding band 112 while the both ends of the core 111 of the roll 110 are supported by the roll receiver 100. The roll receiver 100 is fixed and supported on both sides of the sheet. Further, when the roll 110 is suspended and supported using the roll receiver 100A, a pair of roll receivers 100A are arranged on both sides of the roll 110, and are formed in a protruding shape at the center of the roll receiver 100A. In the state where the plug 105 is fitted into the end of the core 111 and both ends of the core 111 of the roll 110 are supported, the roll receiver 100A is fixed and supported on both sides of the roll 110 by the binding band 112. become.

  9 is applied to a relatively heavy roll 110 having a roll weight of 200 to 1200 kg, the substrate portion 101 has a large size of 500 to 1000 mm square, and the reinforcing rib 102 has a thickness of 3 as well. The opening 104 is set to an opening width of approximately 6 inches, and the weight of the roll receiver 100 itself is selected in accordance with 2 to 15 kg and the weight of the roll 110. The roll receiver 100A of FIG. 10 is applied to a relatively light roll 110A of 10 to 500 kg, the size of the substrate portion 101 is relatively small, 200 to 600 mm square, and the thickness of the reinforcing rib 102 is as thin as 1 to 3 mm. The pipe-shaped plug 105 has a circular opening of approximately 3 inches or approximately 6 inches.

  The material problem common to these roll receivers is that they are suspended in the air in order to support the load of the roll in the square or rectangular plate-shaped members constituting the roll receiver, particularly near the openings of the plate-shaped members. Seismic resistance against load and vibration during transportation is required. In order to solve such problems, generally, a hard and strong material is selected for the plate-like member constituting the roll receiver, but the weight of the roll receiver itself is increased and workability is deteriorated. There's a problem. Also, in the future, from the viewpoint of environmental protection, there is a problem that leads to contamination of the roll, such as the woody system is easy to absorb moisture, and rots and straws grow, and the wood crust sticks as garbage. It tends to be impossible. In addition to being too heavy, the metal system has a problem of rusting and contaminating the roll.

  Synthetic resin materials are relatively light and durable, and have no problems with moisture absorption, decay, or crushing, and have gradually become popular in place of wood. However, when manufacturing by injection molding, the cost of the product is high in addition to the cost of the mold, so a reinforcing rib is set on one side of the plate-like substrate to reduce weight and cost Are formed in a protruding shape, and a plurality of bottomed concave portions are formed by the substrate portion and the reinforcing rib. However, if the thickness of the substrate and the reinforcing rib is set to be thin, the roll holder will crack due to collisions and vibrations that occur during roll packing and transportation, reducing the number of times the roll holder can be used repeatedly, and the back of the roll holder The bending strength on the rib structure side is weak, and problems such as bending of the roll holder itself occur when binding with a binding band. For this reason, there is a limit to reducing the thickness of the substrate portion and the reinforcing rib, which has been an obstacle to weight reduction and cost reduction. In addition, there is a problem that leads to roll contamination such that fine dust or dust is likely to be accumulated in a concave portion constituted by a plurality of reinforcing ribs, and cleaning is difficult.

  Further, a roll receiver made of a synthetic tree foam (Patent Document 1) has also been proposed and put into practical use. By using the in-mold foam molding method with beads, it is easy to form additional parts such as U-shaped, circular, and flask-shaped openings or plugs, and it is durable if it is made of a polyolefin-based material. The roll load resistance can be set by changing the density of the foam in the same foaming mold, and it is a cushioning material itself, so there is no need to insert a cushioning material separately between the roll holder and the roll end face. Features such as good. However, since it is a foam compared to a molded product made of a non-foamed synthetic resin material, only low rigidity is obtained, stress concentrates on the opening that receives the roll load, and the opening is deformed in the transportation test, It may be melted by vibrational frictional heat. In addition, when stacking roll holders in a state where they are assembled to rolls, problems such as insufficient load resistance and deformation of the holders, or large swinging during transportation and dropping of the upper stage There is. In order to solve these problems, the thickness of the plate member of the roll holder is increased from several times to several tens of times that of the conventional material, or a foam having a considerably high density (low expansion ratio) is adopted. However, by increasing the thickness, there is a problem that a large transport space is required in the cardboard box, on the pallet, or on the truck bed, and if the density is increased, the material cost increases, The current situation is that the material characteristics of the beaded expanded polypropylene are not fully exhibited because the economy is impaired.

JP 2003-206072 A

  As described above, the roll holder obtained by the injection molding method has a rib structure on the back to reduce weight, but it is easy to crack due to vibration during transportation, and a binding band is strongly attached to the rib structure side on the back. Since the receiver itself bends when hung, there is a problem that it is difficult to set the board thickness of the substrate portion and the reinforcing rib thinner than the current state, and it is too heavy to handle manually. In addition, there is a problem that dust or dust tends to accumulate in the recess formed by the reinforcing rib.

  On the other hand, in a roll receiver made of a synthetic resin foam obtained by a bead method in-mold foam molding method, only a low rigidity can be obtained with the foam alone, and in order to obtain sufficient rigidity, the roll receiver is configured. At present, the only option is to make the plate-like member considerably thicker or make the density considerably lower.

  Furthermore, as a result of careful examination and arrangement of the problems, the inventors have made contact with or opposed to the end of the roll when loading rolls in order to reduce weight and reduce costs. A plate-like substrate portion having a flat surface and a rib structure composed of reinforcing ribs erected in a set pattern on the plane of the substrate portion on the opposite side of the roll, and having an open bottom with a rib structure that is visible A structure having a plurality of concave portions is employed, and a plurality of problems as a roll receiver brought about by this structure have been found. The first problem is that the substrate part and the back rib structure lack isotropic mechanical strength, and the bending strength from the plane side of the substrate part is much larger than the bending strength from the back rib structure side. It's great. If this is bound by a binding band from the back rib structure side, this leads to bending without being able to withstand the binding strength. The second problem is that since it is made of a non-foamed synthetic resin, it has poor buffering performance, easily resonates with the rolls loaded by vibration during transportation, and the amplitude increases. This leads to cracks in the receiving tool due to vibrations, reducing the number of times it can be used repeatedly. The third problem is that in order to compensate for the above two problems, the thickness of the substrate part and the thickness of the reinforcing ribs must be increased. It leads to the current situation that the tool is heavier than necessary. The fourth problem is that the back rib structure is a structure in which dust and dust easily accumulate, and is difficult to clean. The fifth problem is that the flat surface of the substrate part is hard and may cause wrinkles on products such as films when the roll end surface is in direct contact. Usually, cardboard or synthetic resin foam sheets are often sandwiched between them. If comprised in this way, it will lead to a cost increase while the number of parts increases.

  An object of the present invention is to provide a roll holder that can be reduced in weight while preventing the occurrence of cracks during transportation, and that can withstand a binding load caused by a binding band and that the receiver itself is not easily soiled.

  As a result of intensive studies to solve the above problems, the inventors of the present invention have combined a relatively rigid non-foamed synthetic resin molded body with a relatively flexible foamed synthetic resin molded body, and a roll receiver. It has been found that the above-mentioned problems can be solved by configuring the present invention, and the present invention has been completed.

  A roll receiver according to the present invention is a flat roll receiver that has a support portion for receiving a core of a roll and is disposed on both sides of the roll to support the roll in a suspended manner. A first component member made of non-foamed synthetic resin in which a reinforcing rib is formed in a protruding shape with a set pattern on the side surface, and a plurality of bottomed concave portions are formed by the substrate portion and the reinforcing rib, and a shape that matches the concave portion A plurality of convex portions, and the plurality of convex portions are fitted into the plurality of concave portions, and are provided with a second constituent member made of foamed synthetic resin coupled to the first constituent member.

  In this roll receiver, since the collision and vibration which occur at the time of packing and transportation of the roll can be absorbed by the first component member made of non-foamed synthetic resin and the second component member made of foamed synthetic resin, the first component member By reducing the thickness of the substrate part and the reinforcing ribs of the roll holder to reduce the weight and cost of the roll holder, the roll holder is strengthened to increase the strength and rigidity and prevent the occurrence of cracks near the support part. The durability of the receiver can be improved. Moreover, since the 2nd structural member is comprised with the molded object made from a foam synthetic resin, the buffer performance of a roll receiver can be improved and the lifetime of a roll receiver is extended. In addition, since the convex portions of the second constituent member are fitted into the plurality of concave portions formed in the first constituent member, and both constituent members are combined and joined, Dust does not collect.

  Here, as the second constituent member, a substrate portion having a smooth surface on one side surface and the plurality of convex portions formed in a protruding shape on the other side surface of the substrate portion can be used. In this roll receiver, by supporting the roll with the smooth surface side of the second component member set to the roll side, the second component member having buffering performance can be brought into contact with or opposed to the roll end surface. For this reason, it is possible to prevent roll wrinkles due to contact with the roll holder without interposing a shock absorber such as corrugated cardboard or foam sheet between the roll and the roll holder, and the work of assembling the roll holder can be omitted because the shock absorber can be omitted. The cost can be reduced while improving the performance. In addition, by arranging the roll receiver and supporting the roll in this way, the first component member is arranged on the outer side of the substrate part side, and the roll receiver is wrapped around the binding band around the substrate part side. Therefore, the deformation of the roll receiver during binding can be reduced, and the durability of the roll receiver can be improved.

  It is also a preferred embodiment that the first constituent member and the second constituent member are made of the same main component synthetic resin material. If comprised in this way, it will become possible to grind and recycle with a grinder as it is, without separating a 1st component and a 2nd component at the time of disposal of a roll holder.

  Furthermore, the second component member may be a polyolefin resin foam molded body obtained by a bead method in-mold foam molding method. When the second component member is made of a polyolefin resin foam molded body, the properties of the polyolefin resin material having both flexibility and durability can be utilized to improve the durability of the roll holder, and the roll It is possible to increase the number of times that the buffer can be repeatedly used by increasing the buffer performance of the receiver.

  Further, the size in the direction orthogonal to the fitting direction of the convex portion with respect to the concave portion is set to a dimension slightly larger than the size of the concave portion, and the convex portion is press-fitted into the concave portion using the elasticity of the second component member. It is also a preferred embodiment to combine the first component member and the second component member. In this case, the first component member and the second component member can be coupled without depending on an adhesive or thermocompression bonding.

  According to the roll receiver of the present invention, since the collision and vibration generated during the packing and transport of the roll can be absorbed by the first component member made of non-foamed synthetic resin and the second component member made of foamed synthetic resin, While reducing the thickness of the substrate portion and the reinforcing rib of the first component member to reduce the weight and cost of the roll receiver, the strength rigidity is increased to prevent the occurrence of cracks in the vicinity of the support portion, thereby improving durability. It can be improved. Moreover, since the 2nd structural member is comprised with the molded object made from a foam synthetic resin, the buffer performance of a roll receiver can be improved and the lifetime of a roll receiver is extended. In addition, since the convex portions of the second constituent member are fitted into the plurality of concave portions formed in the first constituent member, and both constituent members are combined and joined, Dust does not collect.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, a roll 1 that is suspended and supported by a roll receiver 10 is formed on a hollow pipe-shaped core 2 made of paper, synthetic resin, glass fiber reinforced plastic (FRP), or metal. It has a well-known configuration in which a long band-like object such as a sheet or a film or a long string-like object such as a thread or a rope is wound to form a roll body 3 made of a band-like object or a string-like material around the core 2. is there. As shown in FIG. 1, the roll 1 has a roll 1A in which both ends of the core 2 are protruded outward from the roll body 3 by a predetermined length, and both ends of the core 2 are formed in the roll body as shown in FIG. A roll 1 </ b> B that is disposed at the same position as both ends of the roll main body 3 without protruding outward from 3 is widely used.

  The roll receiver 10 shown in FIGS. 1 to 5 is for supporting the roll 1 </ b> A in a suspended manner, and is composed of a square or rectangular plate member having a plane having a size larger than the diameter of the roll body 3. The tool 10 is formed with a substantially U-shaped opening 11 (which corresponds to a support part) extending from the center of the upper edge portion in the length direction to the center of the roll receiver 10. When the roll 1 is suspended and supported, a pair of roll receivers 10 are arranged on both sides of the roll 1, and both ends of the core 2 projecting outward from the roll body 3 are opened to the openings 11 of the roll receiver 10. The roll holder 10 is fitted and placed on the lower end of the roll, and the roll 1 is supported by the two roll holders 10. In this state, the pair of roll holders 10 and the roll 1 are integrated with the binding material 4 such as a binding band. The roll unit 5 is coupled and suspended and supported, and the roll unit 5 suspended and supported in this manner is loaded on a pallet and transported, or loaded and stored in multiple stages.

  The characteristic configuration of the present invention resides in that such a roll receiver 10 is composed of a first component member 12 made of non-foamed synthetic resin and a second component member 13 made of foamed synthetic resin. The first component member 12 has a reinforcing rib 12b formed in a protruding shape on one side surface of a plate-like substrate portion 12a, and a plurality of bottomed recesses 12c formed by the substrate portion 12a and the reinforcing rib 12b. The second component member 13 is formed by forming a plurality of convex portions 13c in a shape matching the concave portions 12c of the first component member 12 on one side surface of the plate-like substrate portion 13a. The plurality of convex portions 13c of the second constituent member 13 are fitted into the plurality of concave portions 12c of the first constituent member 12, and are integrally assembled.

  The first component member 12 includes a flat substrate portion 12a, and reinforcing ribs 12b provided in a protruding shape with a set pattern on one side surface of the substrate portion 12a, and is a conventional non-foamed synthetic resin roll receiver. Similarly to the above, it is composed of a non-foamed synthetic resin molded product molded by injection molding or the like. The reinforcing rib 12b includes an outer wall portion 14 that is provided upright along the outer edge of the substrate portion 12a, and a partition wall portion 15 that partitions the inside of the outer wall portion 14 into a plurality of recesses 12c. The arrangement position of the partition wall 15 can be appropriately set in consideration of the strength and rigidity, and the outer wall 14 and the partition wall 15 are disposed on the surface of the first component member 12 on the reinforcing rib 12b side. A corresponding concavo-convex pattern is formed.

  The height, width and thickness of the first component member 12 and the opening width of the opening 11 are appropriately set according to the size and weight of the roll 1 to be suspended and supported. Moreover, although the board thickness of the board | substrate part 12a and the board thickness of the reinforcement rib 12b will be suitably set according to the magnitude | size and weight of the roll 1 which carries out suspension support, in this invention, the 1st structural member 12 and the 2nd structure Since the roll receiver 10 is comprised with the member 13, overall plate | board thickness can be set thinner than the roll receiver made from the conventional non-foaming synthetic resin. The plate thickness of the substrate portion 12a, the plate thickness of the outer wall portion 14, and the plate thickness of the partition wall portion 15 may be set to be the same or different. It is also possible to change the plate thickness depending on the part of the roll receiver 10.

  Synthetic resin materials such as ABS resin, polypropylene resin, and impact-resistant polystyrene resin (HIPS) can be used as the material of the first component member 12, but the main component is the same as that of the second component member 13. If configured, the first structural member 12 and the second structural member 13 are not separated from each other when the roll receiver 10 is discarded, but are directly pulverized by a pulverizer and regenerated and reused as a material used for injection molding or the like. Is preferable.

  The second component member 13 includes a flat plate-like substrate portion 13a having a smooth side surface and a plurality of convex portions 13c formed on the other side surface of the substrate portion 13a. The first constituent member 12 is disposed in the same arrangement position as the plurality of concave portions 12c and is formed in a shape that fits the concave portion 12c. The plurality of convex portions 13c are fitted into the plurality of concave portions 12c of the first constituent member 12. In combination, the two structural members 12 and 13 can be integrally coupled. The size of the convex portion 13c may be set to be the same as the size of the concave portion 12c, but is set to be slightly larger, the foamed molded body constituting the convex portion 13c is compressed, and the convex portion 13c is press-fitted into the concave portion 12c. If it comprises so that it may match, both the structural members 12 and 13 can be couple | bonded only by fitting, without using an adhesive agent or carrying out thermocompression bonding, and it is preferable. However, both constituent members 12 and 13 can be coupled by an adhesive, thermocompression bonding, or other locking structures, or any combination of these coupling methods can be coupled. In addition, it is preferable that the convex portion 13c and the concave portion 12c are fitted with substantially no gap, but it is also possible to fit with a partial gap, or one or more specific ones of the plural concave portions 12c. It is also possible to omit the convex portion 13c corresponding to the concave portion 12c. Further, the substrate portion 13a is omitted, and a plurality of convex portions 13c made of independent molded bodies are manufactured, and these are individually fitted and fixed to the plurality of concave portions 12c, or a band plate is used instead of the substrate portion 13a. It is also within the scope of the present invention to connect the plurality of convex portions 13c with a connection portion having a shape.

  The second component member 13 was manufactured by a bead method in-mold foam molding method using a polystyrene resin, a polyolefin resin such as a polyethylene resin or a polypropylene resin, or a copolymer of these synthetic resins. It is comprised with a foaming molding. And, by using the foamed molded article of polyolefin resin in this way, the characteristics of the material having both flexibility and durability are utilized, and since there is a buffer property, it is possible to realize the roll receiver 10 that can be used repeatedly for a long time. .

  Here, the bead method in-mold foam molding method is to create a pre-foamed particle (foamed bead) having a diameter of about several millimeters in advance and to form a molding space having a shape suitable for a foam having a predetermined shape. Filled into the mold, heated with steam, secondary foamed to fill the voids between the particles and fuse the particles to each other, then cooled and taken out from the mold, foamed in the desired shape It is a molding method for obtaining a molded body. The biggest feature is that foams with various desired shapes can be obtained by foam molding in the mold based on the mold design, unlike the plate-like body and block obtained by extrusion foaming and bulk foaming. That is, it is shaped.

  Next, the above-mentioned polyolefin is a resin obtained by polymerizing a olefin monomer having 2 to 8 carbon atoms such as ethylene, propylene, pentene, heptene, octene or a cyclic olefin monomer such as norbornene, or two or more kinds thereof, or It is a polymer containing this as a main component. Styrene-modified polyolefin, which is a composite polymer, also falls within the scope of the present invention, and preferably has an olefin content of 30% by weight or more, more preferably 50% by weight or more.

  The roll receiver 10 is used by being assembled to the roll 1 as described above. Since the opening 11 is formed in a U shape, even a heavy roll 1 is lifted by a chain block or the like. The roll receiver 10 can be suspended from the upper side of the roll receiver 10 arranged in parallel with a gap so that the end of the core 2 is inserted and fitted into the opening 11 and assembled to the roll 1. Moreover, although the roll receiver 10 may be arrange | positioned at the both sides of the roll 1 so that the 1st structural member 12 may be arrange | positioned at the roll 1 side, the 2nd structural member 13 is arrange | positioned at the roll receiver 10 side. Thus, when the roll receiver 10 is arranged on both sides of the roll 1, the substrate portion 13 a of the second component member 13 made of a foam is arranged at the contact point with the end of the roll body 3. Assembling work of the roll receiver 10 is as much as it is possible to prevent wrinkles of the roll body 3 due to contact with the roll receiver 10 without interposing a buffer material such as corrugated cardboard or foam sheet between the roll receivers 10, and to eliminate the buffer material. The cost can be reduced while improving the performance. Further, when the roll receiver 10 is arranged in this way, the binding material 4 is wound around the substrate portion 12a side of the first component member 12 which is advantageous in terms of strength. Therefore, the deformation of the roll receiver 10 at the time of binding is performed. The durability of the roll receiver 10 can be improved.

  Moreover, the structure which manufactures the roll receiver 10 by combining the 1st structural member 12 made from a non-foaming synthetic resin, and the 2nd structural member 13 made from a foamed synthetic resin like this roll receiver 10, The present invention can be similarly applied to a well-known roll receiver configured to support the roll 1 with a support structure different from that of the roll receiver 10. For example, instead of the support portion formed of the U-shaped opening portion 11, a support portion formed of a circular or flask-shaped opening portion is provided, and the end of the core 2 is directly inserted into this opening portion, The same applies to a roll receiver configured to support the roll 1 by fitting a cylindrical plug into the part and inserting the end of the plug into the core 2 of the roll 1. can do. The flask-shaped opening is the opening provided in the vertical direction extending from the center of the upper edge of the roll receiver to the center of the roll receiver and the lower end of the opening. The opening part which consists of a circular opening part with a diameter larger than the opening width of a part is meant.

  Furthermore, the present invention can be similarly applied to a roll receiver in which a plug is integrally provided on the roll receiver. Specifically, as in the roll receiver 10A shown in FIGS. 6 to 8, instead of the U-shaped opening 11 in the first component member 12, a cylindrical plug 16 is integrally formed in a protruding shape at the center. Instead of the U-shaped opening 11 in the second component 13, the formed first component 12 </ b> A and the second component 13 </ b> A formed with a round hole-shaped opening 11 </ b> A through which the plug 16 is inserted are provided. You can adopt things. The roll receiver 10A is configured in the same manner as in the above embodiment except that the plug 16 and the round hole-shaped opening 11A are provided. A description thereof will be omitted.

  In this roll receiver 10A, the convex portions 13c of the second constituent member 13A are respectively fitted into the plurality of concave portions 12c of the first constituent member 12A, and the plug 16 is inserted into the opening portion 11A. The roll holder 10A is assembled so that the plug 16 protrudes outward from the substrate portion 13a. Further, as shown in FIG. 8, roll receivers 10 </ b> A are arranged on both sides of the roll 1, and plugs 16 are fitted and inserted into both ends of the core 2, so that both ends of the core 2 are outside the roll body 3. It is possible to support the roll 1 </ b> B that does not protrude to the right. In addition, unlike the conventional roll receiver, by providing the plug 16 on the reinforcing rib 12b side, the substrate portion 13a of the second component member 13 made of the foamed molded body can be disposed on the roll 1 side. Assembling workability of the roll holder 10A can be eliminated by preventing the wrinkle of the roll main body 3 due to contact with the roll holder 10A without interposing a buffer material such as corrugated cardboard or foam sheet between the holders 10A, and eliminating the buffer material. As a result, the cost can be reduced. Further, when the roll receiver 10A is arranged in this manner, the roll receiver 10A can be bundled by winding the binding material 4 around the substrate portion 12a side of the first structural member 12A, which is advantageous in terms of strength. The deformation of the tool 10A can be reduced, and the durability of the roll receiver 10A can be improved.

(Example 1, Comparative Examples 1-3)
As Example 1, the material, size, and weight are set as shown in Table 1, and the first component member 12 made of non-foamed synthetic resin having the configuration shown in FIG. 4 and the second configuration made of foamed synthetic resin are used. The member 13 is manufactured, and the first constituent member 12 and the second constituent member 13 are integrated by fitting the plurality of convex portions 13 c of the second constituent member 13 into the plurality of concave portions 12 c of the first constituent member 12. A roll receiver 10 as shown in FIG. 5 was produced.

  Further, as Comparative Example 1, the same shape as the first component member 12 made of non-foamed synthetic resin of Example 1, and the thickness of the substrate portion 12a and the reinforcing rib 12b in the first component member 12 is increased. A non-foamed synthetic resin roll receiver used alone is manufactured, and as Comparative Example 2, the thickness and thickness of the substrate and reinforcing ribs of the roll receiver of Comparative Example 1 are reduced and used alone. An attempt was made to make a roll receiver, and as Comparative Example 3, a roll receiver made of only a synthetic resin foam and having a high density (low expansion ratio) and an increased thickness of the entire receiver was manufactured. The materials, sizes, and weights of Comparative Examples 1 to 3 were set as shown in Table 1. Common to Example 1 and Comparative Examples 1 to 3 is that the molded body made of non-foamed synthetic resin is made of polypropylene, and the molded body made of foamed synthetic resin is obtained by foam molding in a bead method. It is made of a polyolefin-based polypropylene foam.

  Using the roll receivers of Example 1 and Comparative Examples 1 to 3, a film roll having a load of 800 kg is suspended and supported, and a pair of roll receivers and film rolls are bound by a binding band to produce a roll unit. A vibration test specified in JIS Z 0230 was performed on this roll unit, and the results shown in Table 1 were obtained.

  From Table 1, the roll receiver of Example 1 has about half the weight of the roll receiver of Comparative Example 1 and is easy to handle by hand, but is sufficiently durable as in Comparative Example 1. It can be seen that it can be reused repeatedly over a long period of time. Moreover, if the base plate and the reinforcing rib are made as thin as in Example 1 as in the roll receiver of Comparative Example 2, the roll receiver can be reduced in weight, but cracks are caused by vibration during transportation. It can be seen that durability cannot be secured sufficiently. Furthermore, when it comprises only a synthetic resin foam like the comparative example 3, although it can comprise as lightweight as Example 1, it turns out that the thickness of a roll receiver is quite thick.

(Example 2, Comparative Examples 4 and 5)
As Example 2, the material, size, and weight are set as shown in Table 2, and the first component member 12A made of non-foamed synthetic resin having the structure shown in FIG. 6 and the second structure made of foamed synthetic resin are used. The member 13A is manufactured, and the first component member 12A and the second component member 13A are integrated by fitting the plurality of convex portions 13c of the second component member 13A to the plurality of recesses 12c of the first component member 12A. A roll receiver 10A as shown in FIG. 7 was manufactured.

  Further, as Comparative Example 4, the same shape as the first component member 12A made of non-foamed synthetic resin of Example 1, and the thickness of the substrate portion 12a and the reinforcing rib 12b in the first component member 12A is increased. To produce a roll receiver made of non-foamed synthetic resin that is used alone, and as Comparative Example 5, reduce the thickness of the substrate and reinforcing rib of the roll receiver of Comparative Example 4 and use it alone. I made a roll holder that I tried. The materials, sizes, and weights of Comparative Examples 4 and 5 were set as shown in Table 1.

  Then, using the roll holders of Example 2 and Comparative Examples 4 and 5, a film unit with a load of 70 kg is suspended and a roll unit in which a pair of roll holders and a film roll are bound by a binding band is manufactured. The roll unit was subjected to a vibration test defined in JIS Z 0230, and the results shown in Table 2 were obtained.

  From Table 2, the roll receiver of Example 2 has sufficient durability, as well as the roll receiver of Comparative Example 4, while reducing the weight as compared with the roll receiver of Comparative Example 4, and is long-term. It can be seen that it can be reused repeatedly. In addition, if the base plate and the reinforcing rib are made thin like Example 2 like the roll receiver of Comparative Example 5, it is possible to reduce the weight of the roll receiver, but the whitening phenomenon is caused by vibration during transportation. It can be seen that durability cannot be secured sufficiently.

Exploded perspective view of roll unit Perspective view of roll unit Vertical section of roll unit Exploded perspective view of roll holder Perspective view of roll holder Exploded perspective view of roll receiver of other configuration Perspective view of the roll holder Longitudinal sectional view with the roll supported using the roll holder Explanatory drawing of conventional roll receiver Explanatory drawing of other conventional roll receivers

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Roll 1A Roll 1B Roll 2 Core 3 Roll main body 4 Bundling material 5 Roll unit 10 Roll holder 11 Opening part 12 1st structural member 12a Substrate part 12b Reinforcement rib 12c Recessed part 13 Second structural member 13a Substrate part 13c Convex part 14 Outer wall Part 15 Partition part 10A Roll receiver 11A Opening part 12A First constituent member 13A Second constituent member 16 Plug

Claims (5)

A plate-shaped roll receiver that has a support portion for receiving the core of the roll, is disposed on both sides of the roll, and supports the roll in a suspended manner,
A first component member made of a non-foamed synthetic resin, in which a reinforcing rib is formed in a protruding shape on one side surface of a plate-like substrate portion, and a plurality of bottomed recesses are formed by the substrate portion and the reinforcing rib; ,
A second component made of foamed synthetic resin having a plurality of convex portions conforming to the concave portions, fitting the plurality of convex portions to the plurality of concave portions, and being coupled to the first component member;
A roll receiver characterized by comprising:   2. The second component member, wherein a substrate portion having a smooth surface is provided on one side surface, and the plurality of convex portions are formed in a protruding shape on the other side surface of the substrate portion. Roll receiver.   The roll holder according to claim 1 or 2, wherein the first component member and the second component member are made of synthetic resin materials having the same main component.   The roll receiver according to any one of claims 1 to 3, wherein the second component member is formed of a polyolefin resin foam molded body obtained by a bead method in-mold foam molding method. . The size in the direction orthogonal to the fitting direction of the convex portion with respect to the concave portion is set to a dimension slightly larger than the size of the concave portion, the convex portion is press-fitted into the concave portion using the elasticity of the second component member, The roll receiver according to any one of claims 1 to 4, wherein the first component member and the second component member are combined.

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