JP2003206072A - Roll receiving means and roll unit using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lightweight and robust roll receiving means having a low water-absorbing property, facilitating the cleaning of stain, excellent in damping capability, needing a facility investment amount smaller than that of injection molding and totally and sufficiently satisfying required performance of the receiving means without causing corrosion or without having anisotropy in strength, and to provide a roll unit using it. <P>SOLUTION: The roll receiving means 12 for installing and supporting the roll 1 in a suspended form by catching both ends of its central core 2 on both sides of the roll 1 is formed of foam polyolefin made by a bead method. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a long strip-shaped material such as a sheet or a film, or a long string-shaped material such as a thread or a rope, which is wound into a roll shape, a coil shape, a bobbin shape, a cheese shape or the like. The present invention relates to a scroll receiver suitable for transporting a scroll and a scroll unit using the same.

[0002]

2. Description of the Related Art Long strips such as sheets and films,
Long strings such as threads and ropes should be rolled, coiled, bobbin-shaped, etc. on a paper, metal or synthetic resin core so that they do not become bulky during transportation or storage. It is handled as a roll wrapped in cheese.

As a method of transporting the scroll, a method of transporting the scroll in a horizontal direction is widely adopted. Specifically, the product part of the scroll is placed on a rug or padding material on a pallet and transported, and both ends of the core are received so that the product part of the roll is not grounded. There is a method of supporting and transporting.

According to the former method, the bottom of the product portion of the scroll is directly placed on the rug or the pad, or only the bottoms of both ends of the product portion of the roll are placed on the pad. Alternatively, there is a problem that fine dust or the like is likely to adhere to the contact portion between the pad material and the product portion of the roll, and the product portion of the roll is easily scratched due to vibration or swing during transportation or transportation.
Further, even when the scrolls are placed on the pallet and stacked in multiple stages, the scroll directly contacts the upper pallet, which causes a problem that the contact portion is damaged.

In the case of supporting the scroll by the latter method, as shown in FIG. 8, it is composed of a substantially square plate-like member whose one side is larger than the diameter of the scroll and has a circular support hole 101 at the center. Using a pair of receivers 100 formed with a roll, a roll 103 is formed in the form of a roll unit 102 shown in FIG.
Will be supported. Specifically, the receiver 100 is arranged on both sides of the scroll 103, and the sheet member 104 is interposed between the receiver 100 and the scroll 103, so that both ends of the core of the scroll 103 are directly or connected to each other (paper. Or metal or synthetic resin) 106 through which the support holes 1 of both receivers 100 are provided.
01, the scroll 103 is supported in a suspended state between both receivers 100, and a binding band 107 is further wound around both receivers 100, and the scroll 103 is fixedly supported by the receivers 100 arranged on both sides thereof. Become. Also,
When the scroll unit 102 is stacked on the pallet 108, both the holders 10 are provided on the upper and lower sides of the scroll unit 102.
The plate-shaped member 109 is fixed over 0 times to increase the frictional resistance between the scroll unit 102 and the pallet 108 and between the scroll units 102 arranged above and below, and the scroll unit 102 is displaced due to vibration during transportation or transportation. It is configured not to. Further, as the sheet member 104, both ends of the scroll 103 are prevented from being damaged due to contact with the receiver 100, and the scroll 10 formed by both receivers 100 is prevented.
In order to sufficiently secure the holding property of No. 3, a low-foam extruded sheet of polypropylene or the like or a cardboard punched product is used.

In this method, since the product part of the roll does not come into contact with the rug or the pad, it is possible to reliably prevent the product part from being damaged by the contact with the rug or the pad as in the former method.
Also, when stacking a plurality of scrolls, as shown in FIG. 9, the scroll unit 102 having the plate-shaped members 109 fixed on the upper and lower sides is set as a unit set, and a plurality of the unit sets are stacked so that the product portion is on the upper side. This has the advantage that the scrolls can be stacked so as not to contact the pallet.

[0007]

By the way, as the receiving tool currently used, the wood-based cutting products are the main products,
There are also plastic injection molded products, cardboard processed products, iron processed products, etc., but each has the following drawbacks.

The wood-based cut product is made of wood-based materials such as wood, plywood, particle board, OSB (Oriented Strand Board), fiber board, etc. Some of the common defects of these wood-based cut products are Listed below, firstly, the wood-based receiver easily absorbs moisture, and molds contaminate the rolls with nutrients such as sugar contained in the wood. In particular, when a food film is wrapped, there is a problem in hygiene. Secondly, even if it becomes dirty with dust or dirt, it needs to be wiped off. If it is washed with water, it absorbs moisture and must be dried, which makes its management complicated.
Thirdly, when it is used for a long period of time, it has a defect that wood chips and scabs are generated from scratches and cracks and damage the scroll. Fourthly, since repeated use of moisture absorption and drying and repeated application of load causes deformation, dimensional shrinkage and cracks, and eventually decay, it cannot be expected to be used frequently too often. Fifth, if the size of the scroll is large, the plate of the receiving tool is also large and heavy, and the workability is poor. Sixth, wood has anisotropy in compressive strength, and it is known that the compressive proportional limit stress in the fiber direction, the radial direction, and the tangential direction is about 100: 10: 5. Then it is a troublesome material. 7thly, when the slenderness ratio (the ratio of the length under load to the dimension of the minimum secondary radius of the cross section) exceeds 30, the buckling phenomenon occurs rapidly in the wood system, so a simple load bearing design (pressure receiving area x unit compression) Strength)
However, in order to prevent buckling, it is necessary to take more thickness than necessary, and as a result, it becomes heavy and the load bearing performance in design is excessive. Eighth, since a hard material such as a wood-based material does not have the property of relieving stress in a small displacement such as vibration within elastic deformation, it is easy to directly transmit the vibration from the outside to the scroll during transportation by truck. Also, if excessive stress is applied, it deforms and does not recover. Ninth, although the unit cost of the material is relatively low, the cutting cost is high because the inner surface of the support hole or the surface of the receiving member must be accurately smoothed. Tenthly, when the scroll has a large diameter, the receiver has to be large and thick, but there is a limit in the wood type. Eleventh, the use of wood leads to the depletion of forest resources from the viewpoint of conservation of the global environment. Twelfth, in order to improve the holding property of the scroll and prevent damage to both ends of the scroll due to contact with the receiver, it is necessary to dispose a sheet member between the scroll and the receiver, and in the case of a scroll unit, the number of parts is reduced. Will increase. Moreover, when stacking on a pallet, it is necessary to dispose plate members on the upper and lower sides of the scroll unit in order to prevent misalignment during transportation or transportation.
Further, there are drawbacks such as an increase in the number of parts and complicated handling of the scroll.

Although the wood-based receiver has been used for a long time, a receiver made of a plastic injection-molded product has recently begun to be used as a material to replace it. A commercially available receiver is made of an injection molded product made of ABS resin or polypropylene. Like the receiver 110 shown in FIG. 10 (a), a flat surface 111 is formed on the surface on the scroll side, and the opposite surface is formed. A reinforcing rib 112 is formed on the inner wall to form a rib structure obtained by stealing meat, and a cylindrical portion 113 is reinforced by the reinforcing rib 112 at the center.
It has been widely adopted that the cylindrical portion 113 is formed with a support hole 114 for supporting a scroll. Further, as in the receiver 120 shown in FIG. 10B, a flat surface 121 is formed on the surface on the scroll side, a reinforcing rib 122 is formed on the opposite surface, and it extends upward from the central portion of the receiver 120. And a pair of support holes 123 in the shape of an elongated slot whose upper end is opened
Receiving members 12 that are formed in parallel with each other with a space left and right
There is also adopted one that can hold two scrolls between 0s.

There are some drawbacks in plastic injection-molded products, and the enumeration is as follows. Firstly, the rib structure is intended to reduce the cost by reducing the weight and the material used, but even in the current state. It is still heavy and not enough in terms of workability. Secondly, in the rib structure, the load bearing strengths of the pressure receiving portions above and below the receiving tool differ in the thickness direction. That is, the scroll side is strong and the opposite side is weak. Thirdly, the rib structure often causes blind spots during cleaning by brushing or the like and stains are insufficiently removed, and the rib structure is often used without being noticed. Fourthly, the plastic receiver is very expensive because the weight of the receiver cannot be reduced any more and the cost of producing the injection-molded product is expensive.

A cardboard-made receiver is inferior in durability,
Can only be used for lightweight scrolls. In addition, when used for a long time, dirt such as corrugated cardboard fragments and dust easily attach to the surface of a roll such as a film. Since corrugated cardboard has low mechanical strength such as compression and bending, stacking it on a pallet will increase strength if it is formed into a shape similar to that of the current wood cutting product or plastic injection molded product. It is impossible. In addition, since it has poor cushioning performance, it is difficult to return to its original shape even if it is deformed even with a small displacement.

[0012] Since a wood-based material lacks strength to support a large-diameter scroll and it is difficult to obtain a continuous wood-based plank, a receiver made of an iron-made product having a support hole formed in an iron plate. Is used. However, the processed iron products have problems such as a heavy receiving tool and rusting to contaminate the film. Further, since it is a rigid body, no cushioning effect can be expected.

The applicant of the present invention has also examined the application of a high density product of bead method expanded polystyrene produced by the bead method to a receiving tool, but there is a problem that it has a cushioning effect but cannot obtain sufficient durability. There was nothing that could withstand use.

The wood-based material generates almost no static electricity, but the plastic-based material may be charged and attract dust and dirt to contaminate the scroll.

[0015]

As a result of intensive studies to solve the above problems, it was found that the above problems can be remarkably improved by applying a high density product of the bead method expanded polyolefin, and the present invention is completed. Came to.

That is, the scroll receiver according to the present invention is a scroll receiver that receives both ends of the core on both sides of the scroll and hangs and supports the scroll in a suspended state. According to the present invention, various drawbacks of the conventional wood-based, plastic, cardboard, and iron-made receivers have been solved. Taking a high density polypropylene polypropylene receiver as an example, it is lightweight and durable, has low water absorption, does not worry about decay, is easy to wash dirt, has no anisotropy in strength, and has excellent cushioning performance. It was found that the amount of capital investment is smaller than that of injection molding, and the required performance of the receiver is comprehensively and sufficiently satisfied.

The bead method is represented by a method for producing expanded polystyrene by the bead method. Pre-expanded particulate pre-expanded particles are filled in a mold of a predetermined shape and heated for the second time. Is a method for producing a foamed body in which foaming expansion is caused, particles are fused to each other without leaving a space, and cooled to obtain a molded body in a mold shape. Pressurized steam is usually used as the heating medium.

Here, the bead method expanded polyolefin is a high density expanded polypropylene having a density of 60 to
It is desirable that the amount is 300 g / L, preferably 90 to 180 g / L. Examples of the polyolefin include polypropylene, high-density polyethylene, medium-density polyethylene, low-density polyethylene, ethylene-vinyl acetate copolymer, and the like. Among them, polypropylene is preferable because it is superior in strength and thermal dimensional change to polyethylene. Molding technology by the bead method of such high density expanded polypropylene,
It was thought to be difficult to realize, but it was realized by the applicant of the present application one or two years ago. However, the polypropylene referred to here means not only polypropylene itself but also a copolymer of a small amount (1 to 5%) of ethylene, butene or the like for improving moldability.

Although the total weight of the roll varies, if the roll of film is taken as an example, the heavy weight is several tens of kg to several tons, and the first required performance of the receiver is that the load resistance is sufficient. It is in performance. Therefore, in order to withstand the weight of a heavy scroll, a low-density foamed polypropylene with a low load bearing capacity must be significantly increased in thickness, and problems such as durability such as lack of strength on the surface and chipping occur. Will occur.
Further, when using extremely high density expanded polypropylene, the same problems as those of wood-based materials occur. That is, the load-bearing performance is unnecessarily high, and the thickness must be reduced in view of cost, which increases the slenderness ratio and causes buckling. From this point of view, the density range of the high-density expanded polypropylene is 60 to 300 g /
L is preferred.

The slenderness ratio of the receiver is preferably set to 50 or less. When the slenderness ratio of the receiver exceeds 50, the thickness of the receiver is insufficient and the load receiving area is reduced, and the load tends to buckle in the middle part due to the load of the scroll,
The slenderness ratio is preferably set to 50 or less.

Antistatic treatment may be applied to the foamed polyolefin by the bead method. In this case, it is possible to prevent dust from adhering to the receiver due to static electricity, and as a result, to prevent contamination of the scroll.

The scroll unit according to the present invention is characterized in that a scroll formed by winding a band-shaped material or a string-shaped material around a core, and a scroll unit arranged on both sides of the scroll. A scroll receiver, which receives a core of a scroll and supports the scroll in a suspended state, and a pair of the scroll receiver wound around both the receivers to integrally bind the scroll and the scroll receivers together. And a tying band.

In this scroll unit, the roll unit is handled as it is or after being covered with a dustproof film or the like and placed on a pallet or packed in a cardboard box or a wooden box. Since it is composed of a bead method foamed polyolefin having, and the contact surface with the scroll can be easily formed into a flat surface, damage to both ends of the scroll due to contact of the scroll with the receiver can be prevented,
It is possible to sufficiently secure the holdability of the scroll by both the receivers, and it is possible to stably hold the roll without disposing a sheet member made of a low-foam extruded sheet or a punched product of cardboard unlike the wooden receiver. Moreover, since shock-absorbing properties are imparted to the receiving members, vibrations during transportation and transportation can be absorbed by both receiving members. Therefore, even if this scroll unit is directly installed on a pallet for transportation or transportation,
It is possible to prevent a problem that the scroll unit is displaced due to vibration during transportation or transportation, and it is possible to stably support the scroll without disposing the plate-like members on the upper and lower sides like the wooden receiver.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 3, the scroll 1 is handled as a scroll unit 10 having the following configuration in order to improve the handling property during transportation or transportation. That is, the plate-shaped receivers 1 are provided on both sides of the scroll 1.
2 are arranged, the connecting tools 14 are fitted in the support holes 13 of both receivers 12 and both ends of the core 2 of the scroll 1, respectively, and a binding band 15 is wound around the middle parts of both receivers 12. Then, it is handled as a scroll unit 10 formed by integrating these members. Then, as shown in FIG.
Such a scroll unit 10 is placed on the pallet 20, and a plurality of the scroll units are stacked and stored or transported. In the state of the scroll unit 10, the scroll unit 10 is packed and stored in a cardboard box, a wooden box or the like. Will be transported. However,
When the scroll unit 10 is packed in a cardboard box, a wooden box or the like, the binding band 15 may be omitted.

The scroll 1 is a hollow pipe-shaped core 2 made of paper, metal or synthetic resin, a long strip-shaped material such as a sheet or film as the product portion 3, and a long length such as a thread or a rope. A long string-like material is wound in a roll shape, a coil shape, a bobbin shape, a cheese shape, or the like.

The connecting tool 14 includes a cylindrical tube portion 14a and a flange portion 14b formed at one end thereof, and is integrally molded of a metal material or a synthetic resin material. It is configured such that the end portion of the core 2 can be supported with respect to the receiving tool 12 by being internally fitted and mounted over both ends of the core 2. However, the connecting tool 14 may have any structure as long as it can support the core 2 with respect to the receiving tool 12. In addition, for example, both ends of the core 2 of the scroll 1 are projected from the product portion 3 of the scroll 1 to both sides,
When the center core 2 is directly supported by the receiving tool 12 by directly mounting the end of the center core 2 in the support hole 13,
It is also possible to omit the connector 14.

The binding band 15 is made of polypropylene or PE.
It is composed of a band-shaped member made of a strong synthetic resin such as T (polyethylene terephthalate), or a band-shaped member made of iron or paper, and both ends thereof can be directly joined by fusion or the like, or a binding not shown. It can be indirectly connected by using a tool. As a method of attaching the binding band 15, as shown in FIG. 2, a method of winding one binding band 15 in the middle in the height direction over both receivers 12, or
As shown in FIG. 5, it is possible to exemplify a method of passing the two binding bands 15A through the core 2 and winding them around the middle portions of both the receiving members 12, but they may be wound by other attaching methods.

The receiving member 12 is composed of a plate-like member made of a polyolefin resin molded by the bead method, and is formed by
As shown in FIG. 3 and FIG. 6A, the support hole 13 is formed in a substantially rectangular shape such as a square shape or a rectangular shape, and a central portion of the support hole 13 into which the tubular portion 14a of the connector 14 is mounted. . The distance from the center of the support hole 13 to each side of the receiver 12 is set to be larger than the diameter of the product portion 3 of the scroll 1, and as shown in FIG. 4, the scroll unit 10 is set on the pallet 20. The product portion 3 of the scroll 1 is configured so as not to contact the pallet 20, and the product portions 3 of the adjacent scrolls 1 do not contact each other. The thickness of the receiving tool 12 is appropriately set according to the weight of the scroll 1 and the like.

Any member can be used as the receiving member 12 as long as it can support both ends of the core 2 to suspend and support the scroll 1 in a suspended state, and the surface of the scroll 1 can be flat. It is possible to adopt a shape or configuration, and for example, as in the receiving member 12A shown in FIG.
Instead of 3, the upper end may be open and may have a vertically elongated elongated hole-shaped support hole 13A. Alternatively, the upper end may be opened as in the receiver 12B shown in FIG. 6 (c). The support hole 13B in the shape of an elongated hole elongated in the vertical direction, in which the keyhole-shaped support hole 13B in which the insertion portion of the core 2 is formed to have a diameter larger than the width of the passage portion on the upper side is adopted. Alternatively, as in the receiver 12C shown in FIG. 6D, a plurality of support holes 13 are formed at intervals on the left and right, and a plurality of scrolls 1 are provided between the pair of receivers 12 arranged in parallel. You may employ | adopt what was comprised so that it could support.

Specific examples of the material of the receiver 12 include polypropylene, high-density polyethylene, medium-density polyethylene, low-density polyethylene, ethylene-vinyl acetate copolymer, and the like. The better polypropylene is preferred. However, the polypropylene mentioned here also includes those obtained by copolymerizing a small amount (1 to 5%) of ethylene, butene or the like for improving moldability.

The density of expanded polypropylene is 300 g /
If it exceeds L, the load-bearing performance increases, but it becomes expensive and the density is 6
When it is less than 0 g / L, the load-bearing performance is drastically reduced and the receiver 1
Since it is not suitable for 2, it is set to 60 to 300 g / L, preferably 90 to 180 g / L. By setting in this way, it is possible to realize a receiving material excellent in load bearing performance while suppressing an increase in manufacturing cost and an increase in weight of the receiving tool 12.

An antistatic treatment may be applied during the manufacturing process of the receiver 12. Specifically, the antistatic agent is melted and kneaded in the production step of unexpanded particles (a string-shaped melt extruded product called a mini pellet, which is cut into strips) which is the first step in the process of producing a foamed polyolefin by the beads method. In the final step, the antistatic agent is attached to the surface of the molded receiver 12 by a method such as dipping. According to this structure, the antistatic performance is imparted to the receiver 12, and the attachment of dust to the receiver 12 due to static electricity can be suppressed, and as a result, the scroll 1 can be prevented from being contaminated.
As the antistatic agent, fatty acid amide type, fatty acid ester type, alkyl sulfonic acid type and the like can be preferably used.

A sheet member made of a low-foam extruded sheet such as polypropylene or a punched product of corrugated cardboard is arranged between the product portion 3 of the scroll 1 and the receiving member 12 to further reduce the frictional resistance or to receive the receiving member. You may make it prevent that the dirt of 12 adheres to the product part 3.

A characteristic feature of the present invention is that the receiving member 12 is made of a bead foamed polyolefin as described above. Table 1 summarizes the performance of the receiver 12 made of bead method expanded polypropylene and the receiver made of wood cutting products, plastic injection molded products, cardboard processed products, iron processed products, and bead method expanded polystyrene. . However, in Table 1, ∘∘∘x is a performance evaluation mark, ∘ indicates a very good evaluation, ∘ indicates a good evaluation, Δ indicates a slightly bad evaluation, and x indicates a bad evaluation.

[0035]

[Table 1]

From Table 1, the polypropylene foamed by the bead method shows that the load-bearing performance, lightness, hygroscopicity, decay, dust source, static electricity, cleanability, repetitive use, cushioning performance, and deformation recovery required for the receiver. It can be seen that excellent performance is exhibited in various performances such as force, anisotropy of strength, and cost.

Next, the density of the expanded polypropylene will be examined. FIG. 7 shows the unit compressive strength (at 5% strain) of the bead method expanded polypropylene having a density of 60 to 300 g / L.
The unit compressive strength when the density is 60 to 300 g / L is approximately 2.5 to 42.0 kgf / cm ^2.
Is in the range. The unit compressive strength when the density is 90 to 180 g / L is generally 4.4 to 15.6 kgf / cm ^2.
Is in the range. Such a unit compressive strength is so low as to be incomparable with the unit compressive strength of the existing wood-based receiver, and is less than 1/10 of the unit compressive strength in the fiber direction of wood. However, the wood-based receiver must increase the thickness of the receiver due to fear of buckling, and therefore the load-bearing design is a safety design that is several tens of times more than the required pressure-resistant load. 1/2 to 1/10 of wood material
Because of its lightness, it is still lightweight even if the thickness is set to several times that of the current wood-based receiver. For this reason, the thickness of the foam polypropylene receiver is increased within the range of maintaining the lightness,
As a result, if the withstand load is increased, proper withstand load performance can be obtained.

In order to verify this, the weight and load bearing capacity of each of the following sizes of wood-based receiver and receiver made of expanded polypropylene were theoretically calculated. Further, since the buckling of wood greatly depends on the slenderness ratio, the slenderness ratios of the wood-based receiver and the polypropylene polypropylene receiver were determined by the following formulas, respectively. Table 2 is a summary of the results. However, the withstand load was obtained under the condition that the roll was supported by two receiving members.

As a wood-based receiver, the height is 670 mm,
The width is 670 mm, the thickness is 30 mm, and the diameter of the support hole is 1
As the receptacle made of foamed polypropylene, which is made of 50 mm red pine, as shown in Fig. 6 (a), a thickness of 60 mm and other sizes set to the same size as the wood-based receptacle are used. I was there.

(Slenderness ratio) Slenderness ratio = Buckling length / Minimum cross-section secondary radius Minimum cross-section secondary radius = short side length of pressure-receiving cross section / 3.46

[0041]

[Table 2]

As shown in Table 2, regarding the withstand pressure load, the current wood-based receiver is 112.6 tons, the foam polypropylene receiver is 6.8 tons, and the polypropylene polypropylene receiver withstand pressure load. Is less than 1/16 of that of the wood-based receiver, but as mentioned above, the load resistance of the wood-based receiver is designed to be several tens of times the required withstand pressure load, which is an excessively safe design. Sufficient load bearing performance can be obtained even with the receiving tool. Moreover, since the receiver made of expanded polypropylene having such a thickness can be set to about half the weight of the wooden receiver, it can be seen that the weight can be reduced to half while ensuring sufficient load bearing performance. Further, the wood-based receiver has a slenderness ratio of 77.3 and is a buckling region of 50 to 1
Since it is included in 00, I would like to increase the thickness and improve the slenderness ratio, but since the weight of the receiving tool becomes heavy,
The current situation is that such a configuration cannot be achieved. On the other hand, with a receptacle made of expanded polypropylene, the slenderness ratio is 3
Since 8.6 is smaller than 50, buckling of the receiver is prevented.

As described above, if the slenderness ratio of the receiver exceeds 50, buckling may occur. Therefore, it is preferable to set the slenderness ratio to 50 or less. It is also possible to set the slenderness ratio to less than 10, but in this case, since the receiving member becomes too thick and a space problem may occur, the slenderness ratio is preferably 50 or less. More preferably, it will be set to 10 to 50.

Next, an example of how to select the density of high-density polypropylene as a receiver is carried out by calculation. <Preconditions> (1) Support the load of the scroll without permanent deformation of the tool. (2) Large number of stacks during storage in the warehouse: 6 steps (upper load is 5 steps) * 1 (3) Slenderness ratio: 40 (4) Safety factor of load capacity: 4 times * 1: Number of stacks is 6 this time Although the number of stages is set, the following calculation method can be applied to the case where the number of stages is desired to be increased or reduced.

As shown in Table 3, the receivers of three sizes are used, and the receiver of the case 1 has a diameter of about 45.
Assuming that a scroll having a weight of 50 cm, a weight of 100 kg, and a weight of 300 kg is erected and supported, the receiver of the case 2 has a diameter of about 60 cm and a weight of 100 kg.
Assuming that the scrolls of 300 kg, 500 kg, and 1000 kg are erected and supported, respectively, the receiving member of the case 3 has a diameter of about 90 cm and a weight of 1000 kg and 200 kg.
Assuming that the scrolls of 0 kg and 3000 kg were erected and supported, the total load including the safety factor, the unit compressive strength, and the density were obtained so as to satisfy the above-mentioned preconditions.
Table 4 is a summary of the results.

[0046]

[Table 3]

[0047]

[Table 4]

As can be seen from Table 4, the density is 60 to 300.
By using expanded polypropylene of g / L, for example, 50 kg to 30 which is often used as a scroll wound with a film.
A 00 kg roll can be supported reasonably, and within such a density range, the slenderness ratio can be set to about 40, so that the buckling of the receiver can be prevented and the thickness of the receiver becomes thicker than necessary. Can be prevented.

Next, the vibration evaluation test conducted on the scroll unit will be described. As a scroll, the total weight of a reflective film wound around a hollow pipe-shaped core is 360 k.
g rolls were used.

(Example) As a receiver, a receiver 12 having the shape and size shown in FIG. 6A was manufactured by a bead method expanded polypropylene. The density of the expanded polypropylene used was 112 g / L. The average weight of the receiving tool 12 was 2.9 kg. As a connecting tool, the length of the tube is 12
The one with 0 mm was used. A polypropylene binding band was used as the binding band. Then, three types of winding units were manufactured, that is, the binding method shown in FIGS. 2 and 5 and the binding method in which binding bands were respectively wound on both the upper and lower sides of the coupling tool over both receiving tools.

(Comparative Example) Instead of the receiver in the above embodiment, a receiver made of red pine having a thickness of 30 mm and other sizes set to the same size as the receiver in the above embodiment was manufactured, and the product part of the roll was manufactured. A sheet member made of a low-foaming extruded polypropylene sheet was disposed between the and the receiving member, and a wound winding unit was manufactured by a binding method similar to that of the winding unit of the above-described embodiment.

Then, the resonance frequency was searched by continuously changing the frequency range from 5 to 55 Hz by the method A-1 (logarithmic sweep) of the vibration test method for packaged cargo specified in JIS Z 0232. As a result, a vertical vibration of 16 Hz and a longitudinal vibration (roll axis direction) of 6 Hz were obtained. Next, in Method B-1, vibration was applied for 10 minutes (equivalent to 2000 km travel) at each resonance frequency for both vertical and longitudinal vibrations.

As a result, in the embodiment, with respect to any of the scroll units bound by the three types of binding methods, the scroll unit did not jump up or the installation position was displaced, and the receiver was not deformed or damaged. . In addition, the shock absorbing performance of the receiver was exhibited and the vibration width of the roll was suppressed, so that the roll could be stably fixed and held. On the other hand,
In the comparative example, as the scroll unit jumped up, the scroll slightly rotated, and the scroll could not be stably fixed and held. Further, in the embodiment, since the scroll can be stably fixed and held with respect to the scroll unit bound by any binding method, it can be seen that the simplest binding method shown in FIG. 2 can be preferably adopted.

[0054]

EFFECTS OF THE INVENTION According to the scroll receiver of the present invention, it is lightweight and has good workability, unlike the wood-based material, it has no hygroscopicity, so that it hardly causes mold, and it does not have cracks or scrapes, so that wood chips adhere Since it does not have to worry about deformation, and there is no fear of deformation or decay, the number of times of use increases, and it does not cause cleaning leakage due to the rib structure like plastic injection molded products, excellent in cushioning performance and strength, and can be manufactured with inexpensive equipment A scroll receiver can be provided.

Here, the bead method expanded polyolefin is a high density expanded polypropylene having a density of 60 to
When it is set to 300 g / L, preferably 90 to 180 g / L, it is excellent in strength and stability with respect to thermal dimensional change, and further, it is possible to suppress an increase in manufacturing cost and an increase in weight,
A receiving material with excellent load bearing performance can be realized.

When the slenderness ratio of the receiver is set to 50 or less,
It is possible to set the thickness of the receiving tool large and secure a sufficient load receiving area, and it is possible to reliably prevent the receiving tool from buckling in the middle thereof due to the load of the scroll.

By subjecting the polyolefin foamed by the bead method to antistatic treatment, it is possible to suppress the attachment of dust to the receiver due to static electricity, and as a result, to prevent contamination of the scroll.

According to the scroll unit of the present invention, since the receiver itself is made of the foamed polyolefin foamed by the bead method having a cushioning property, damage to both ends of the scroll due to contact with the receiver can be prevented and both receivers can be prevented. The holding property of the scroll can be sufficiently ensured, and the scroll can be stably held while reducing the number of parts. Moreover, since vibrations during transportation and during transportation can be absorbed by both receiving members, the scroll can be supported with good stability without increasing the number of parts. Further, since the number of parts is small, the handling property of the scroll can be remarkably improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a scroll unit using a receiver according to the present invention.

FIG. 2 is a perspective view of the scroll unit.

FIG. 3 is a vertical sectional view of the scroll unit.

FIG. 4 is an explanatory diagram of a method of transporting the scroll unit.

FIG. 5 is an explanatory view of another binding method of the scroll unit.

6A to 6D are perspective views of a receiver according to the present invention.

FIG. 7 is a diagram showing the relationship between the density and the unit compressive strength of bead method expanded polypropylene.

FIG. 8 is a perspective view of a wooden receiver according to a conventional technique.

FIG. 9 is an explanatory view of a method of transporting a scroll unit using the receiving tool.

10 (a) and 10 (b) are perspective views of a receiver made of a plastic injection-molded product according to a conventional technique.

[Explanation of symbols]

1 scroll 2 core 3 product parts 10 scroll unit 12 receiver 13 Support hole 14 Connecting tool 14a Cylinder part 14b Flange part 15 unity band 12A receiver 13A support hole 12B receiver 13B support hole 12C receiver 15A binding band 20 pallets

Continued front page    (72) Inventor Masakazu Yoshida             1-2-21 Torikai Hachiro, Settsu City, Osaka Prefecture (72) Inventor Kyosuke Sagara             1-37-604 Hotarudani, Otsu City, Shiga Prefecture F term (reference) 3E085 BA22 BB32 BD07 BD08 BD10                       BG01                 3F058 AB01 AB03 DA04 DB05 KA01                       MA01 MA03

Claims (5)

[Claims] 1. A scroll receiver for supporting both ends of a center core of the scroll on both sides of the scroll and suspending and supporting the scroll in a suspended state, the scroll receiver being formed of a bead method expanded polyolefin. Ingredient 2. The bead-method expanded polyolefin is a high-density expanded polypropylene having a density of 60 to 300.
The scroll receiver according to claim 1, which is g / L. 3. The scroll receiver according to claim 1, wherein the slenderness ratio of the receiver is set to 50 or less. 4. The scroll receiver according to claim 1, wherein the bead-method expanded polyolefin is subjected to an antistatic treatment. 5. The scroll receiver according to any one of claims 1 to 4, wherein the scroll is formed by winding a band-shaped material or a string-shaped material around a core, and arranged on both sides of the winding material. , Receiving the core of the scroll,
A scroll unit, comprising: a pair of scroll receivers for supporting the scroll in a suspended state; and a binding band that is wound around both the receivers and integrally binds the scroll and the scroll receivers together. .