JP2002371697A - Drainboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drainboard 1 excellent in impact absorbing properties, stability for walking and abrasion resistance. SOLUTION: The drainboard 1 is composed of cushion parts 3, base plates 5 and cross beam parts 7. Cushion parts 3 are laminated on the base plates 5 respectively. The base plates 5 are juxtaposed in a plurality on the cross beam parts 7 at a space of a prescribed width from each other. The base plates 5 and the cross beam parts 7 are joined by an adhesive or the like. The cushion parts 3 are formed of a soft material. The base plates 5 and the cross beam parts 7 are formed of a hard material. The Asker C hardness of the base plates 5 is 65 or above. The Asker C hardness of the cushion parts 3 is 60 or below. The cushion parts 3 are constituted of a polymer molded body containing foams. The upper side of each cushion part 3 is a skin layer. The surface of the skin layer is embossed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lantern placed in front of a shoe box, in a corridor, in a toilet, at a poolside, in a gym, on a veranda or the like.

[0002]

2. Description of the Related Art Kindergarten children change their kindergarten shoes and upper shoes in front of a shoe box. For the convenience of changing shoes, a pens may be placed in front of the shoe box. Wooden things have long been used as wooden pens. Wooden cages are easily corroded by rainwater and have poor durability. Also,
If a wooden cage breaks or breaks due to an impact, its fragments and fracture surfaces are sharp and dangerous. In addition, wooden cages have insufficient shock absorption. In addition, the wooden cages are heavy and difficult to move.

[0003] In recent years, there has been proposed a cage made of synthetic resin. Synthetic resins are more excellent in corrosion resistance than wood, and thus, synthetic resin pens are becoming popular. However, a synthetic resin cage is easily broken by an impact. Moreover, it is inferior in shock absorption like a wooden cage, and is heavy. In addition, a kindergarten who uses a synthetic resin cage in winter feels cold on his feet. In addition, in the case of a plastic resin cage, the child's feet tend to slip.

[0005] As shown in FIG. 5, a paddle 25 having a base plate 21 made of a synthetic resin having a concave portion on the upper side and a soft tape 23 embedded in the concave portion is also used. In this cage 25, the soft tape 23 prevents the child from slipping. However, the soft tape 23 focuses solely on preventing slippage, and hardly contributes to the improvement of shock absorption. Further, the base plate 21 is provided on both sides of the recess.
Is extended to the upper side, and the upper surface of the cage 25 has a hard material and a soft material alternately present. Therefore, there is a problem that a child who comes into contact with the upper surface of the cage 25 feels strange.

[0005]

[0006] Means for forming a sieve from a synthetic resin containing air bubbles are also conceivable. By setting the foaming ratio to an appropriate value, impact absorption is exhibited and weight reduction can be achieved in this shirako.

[0006] However, the porcelain that has an increased foaming ratio until it exhibits sufficient shock absorption is inferior in rigidity.
If a child sits on top of this, it tends to bend. This destabilizes the child's walking. In addition, a porcelain child having an excessively high foaming ratio is easily worn by rubbing with the ground.

[0007] The present invention has been made in view of the above problems, and an object of the present invention is to provide a cage that is excellent in shock absorption, walking stability, and wear resistance.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the invention has a base plate in which a plurality of base plates are arranged in parallel with a gap therebetween, and a cushion portion laminated above the base plate. A base plate made of a hard material and a cushion portion made of a soft material.

[0009] In this stool, walking stability and wear resistance are exhibited by the base plate made of a hard material. In addition, shock absorption is exhibited by the cushion portion made of a soft material. This pen has both the advantages of a hard material and the advantages of a soft material.

[0010] Preferably, Asker C of the base plate
Hardness is 65 or more. Thereby, more excellent walking stability and wear resistance are exhibited. Preferably, the Asker C hardness of the cushion portion is 60 or less. This allows
Excellent shock absorption is exhibited.

[0011] Preferably, the cushion portion covers the entire upper surface of the base plate. In the case of the Uonoko, even if the base plate is damaged by the impact, the exposure of the fractured surface is prevented by the cushion portion. Therefore, it is safe.

As the cushion portion having excellent shock absorbing properties, there is a cushion portion formed of a polymer molded article containing air bubbles. Preferably, the upper surface of the polymer molded body containing bubbles is a skin layer (a thin layer without bubbles). Since the skin layer prevents the air bubbles from being exposed, the cushion portion is not easily stained. If this skin layer is embossed, the slip of a person walking on the siding is suppressed.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
The present invention will be described in detail based on preferred embodiments.

FIG. 1 is a perspective view showing a part of a lantern 1 according to an embodiment of the present invention. FIG. 2 is a plan view showing the hanko 1 of FIG. The child of this cage 1
Comprises a cushion portion 3, a base plate 5, and a beam portion 7. The cushion portion 3 is laminated on the base plate 5 with an adhesive or the like. The base plate 5 includes a beam 7
Are arranged side by side with a gap having a predetermined width. The base plate 5 and the beam part 7 are joined by an adhesive or the like. The cushion part 3 is made of a soft material. The base plate 5 and the beam 7 are made of a hard material.

FIG. 3 is a partially enlarged sectional view taken along the line III-III of FIG. As is clear from this figure, the cushion portion 3 covers the entire upper surface of the base plate 5.
That is, only the cushion part 3 is present on the upper surface of the bed 1. Therefore, even if the child falls over on the laying child 1, the child's body does not directly hit the base plate 5. Since the child's body collides with the cushion portion 3 made of a soft material, the impact applied to the child is reduced.

In the sash 1, rigidity is exhibited by the base plate 5. Even if a child walks on this fold child 1, the fold child 1 is unlikely to bend. This cage 1 is excellent in walking stability. Also. Since the portion made of a hard material rubs against the ground in the cradle 1, the cushion portion 3 is hardly worn.

The cushion 3 is made of a polymer molded body containing air bubbles. The cushion 3
Is provided with shock absorbing properties. The bubbles also provide the cushion portion 3 with heat retention. Therefore, for example, discomfort for a person who steps on the child 1 with bare feet is reduced.

The base polymer used for the cushion portion 3 is, for example, an ethylene-vinyl acetate copolymer (EV
A), polyethylene, polypropylene, polyvinyl chloride, natural rubber, various synthetic rubbers and the like. These polymers may be used alone or as a mixture of two or more. Among these polymers, polyolefin-based synthetic resins (ethylene-vinyl acetate copolymer, polyethylene, polypropylene, etc.) that do not generate harmful substances when incinerated and are plasticized by heating so that they are easy to mold
Is preferable, and an ethylene vinyl acetate copolymer having excellent shape restoring force is particularly preferable.

The bubbles contained in the cushion portion 3 may be closed cells or open cells. From the viewpoints of shape restoring force, non-water absorption and the like, closed cells are preferred. Bubbles are usually formed by foaming of a pyrolytic foaming agent. Examples of the pyrolytic foaming agent used include an azo compound (for example, azodicarbonamide), a nitroso compound (for example, dinitrosopentamethylenetetramine), and a triazole compound.

The expansion ratio (the ratio of the density in the absence of air bubbles to the density in the presence of air bubbles) of the cushion portion 3 is preferably from 2 times to 30 times. If the expansion ratio is less than the above range, the shock absorbing properties of the cushion portion 3 may be insufficient. In this respect, the expansion ratio is particularly preferably equal to or greater than 3 times. When the expansion ratio exceeds the above range,
The strength of the cushion portion 3 may be insufficient. Rebound,
From the viewpoint of physical properties such as restoring force, the expansion ratio is particularly preferably 15 times or less.

The hardness of the cushion 3 measured by an Asker C hardness meter is preferably 60 or less. Thereby, excellent shock absorption is exhibited. From this viewpoint, the hardness is 55
The following is more preferable, and 50 or less is particularly preferable. If the hardness is too low, the strength of the cushion portion 3 may be insufficient. Therefore, the hardness is preferably 10 or more, particularly preferably 20 or more.

The cushion portion 3 may contain a suitable amount of filler such as silicon oxide, talc, clay, barium sulfate, magnesium carbonate, calcium carbonate, rubber powder, resin powder and the like. Adjustment of the specific gravity and texture of the cushion portion 3 can be performed by blending the filler. The amount (mass ratio) of the filler is 10 parts or more and 2 parts with respect to 100 parts of the base polymer.
It is about 00 parts or less.

A suitable amount of a colorant (eg, a pigment) may be blended in the cushion portion 3. Thereby, the aesthetic appearance of the child 1 is improved. By intentionally making the dispersion of the colorant non-uniform, a pattern such as a grain pattern may be formed.

In addition to the above-mentioned foaming agent, filler and colorant, the cushion portion 3 has a foaming assistant, a deterioration inhibitor, an ultraviolet absorber, a flame retardant, a softener, a processing aid, a crosslinking agent, a bulking agent, An additive such as an antibacterial agent may be added in an appropriate amount as needed.

FIG. 4 is a perspective view of the cushion part 3 of the paddle 1 shown in FIG.
Is a partially enlarged sectional view of FIG. What is indicated by reference numeral 9 in this figure is a bubble. As is apparent from FIG.
Does not exist. This region is a so-called skin layer. Since the air bubbles 9 are not exposed on the upper surface of the cushion portion 3, the cushion portion 3 is hardly soiled. On the other hand, bubbles 9 are exposed on the bottom surface of the cushion portion 3. This bubble 9
Is easily impregnated with the adhesive, so that the adhesion between the cushion portion 3 and the base plate 5 is improved.

As is clear from FIG.
The upper surface (the surface of the skin layer) has irregularities due to embossing. The unevenness prevents a person who walks on the bed 1 from slipping.

The cushion portion 3 does not necessarily need to be formed of a polymer molded body containing the bubbles 9, but may be formed of solid soft rubber, soft synthetic resin, or the like.

The thickness of the cushion 3 is preferably 5 mm or more, particularly preferably 8 mm or more. When the thickness is in this range, excellent shock absorption is exhibited. If the cushion portion 3 is too thick, the cage 1 becomes heavy, so the thickness is preferably 20 mm or less, particularly preferably 15 mm or less.

Base plate 5 (see FIGS. 1 to 3)
Has a hardness of preferably 65 or more. Thereby, child 1
Walking stability and abrasion resistance are improved. From this perspective,
The hardness of the base plate 5 is particularly preferably 80 or more. From the viewpoints of walking stability and abrasion resistance, the higher the hardness, the better, so there is no limitation on the upper limit of the hardness in the present invention.

Examples of the material of the base plate 5 include hard synthetic resin, hard rubber, and wood. From the viewpoint of being hardly corroded, a hard synthetic resin and a hard rubber are preferable. A synthetic resin containing bubbles 9 may be used for the base plate 5. When a synthetic resin containing the air bubbles 9 is used, the expansion ratio is set so that the rigidity of the sandbag 1 is maintained, or the base polymer is selected. The use of the synthetic resin containing the air bubbles 9 allows the weight of the lantern 1 to be reduced. In light of weight reduction, the specific gravity of the base plate 5 is preferably equal to or less than 0.5, and particularly preferably equal to or less than 0.35.
A preferable material for the base plate 5 is polystyrene containing air bubbles, from the viewpoint of achieving both reduction in weight and rigidity.

Since the base plate 5 is made of a hard material, it may be damaged by an impact when, for example, the upright child 1 falls down. Even if damage occurs, the entire upper surface of the base plate 5 is covered with the cushion portion 3 so that the fractured surface is not exposed.

The material of the girder 7 is not particularly limited, but a material equivalent to that of the base plate 5 can be suitably used.

In order to obtain the lacquerware 1, a base polymer, a foaming agent, a foaming aid, a colorant and the like are kneaded with a kneader such as a kneader or a Banbury mixer to obtain a polymer composition. Next, the polymer composition is charged into a preforming mold,
Heat. This preform has a block-shaped cavity. The foaming agent foams by heating, and a block-shaped preform is obtained.

Next, the preform is sliced into a plate shape so as to have a predetermined thickness. Next, this plate-shaped preform is put into a main mold. The upper cavity surface of the present mold has irregularities. In the main molding, only the vicinity of the upper surface of the preform is heated. Thus, the cushion portion 3 is obtained. The upper surface of the cushion portion 3 has an uneven shape in which the unevenness of the upper cavity surface is inverted (embossing). In addition, a skin layer is formed on the upper surface of the cushion portion 3 by heating near the upper surface of the preform.

Next, a base plate 5 is prepared, and the upper surface of the base plate 5 is covered with a cushion 3 by an adhesive.
Are laminated. In this way, a plurality of (for example, six) base plates 5 integrated with the cushion portion 3 are joined to the girder portion 7 so as to be arranged side by side at a predetermined interval. First, after joining the base plate 5 to the beam part 7, the cushion part 3 may be laminated on the upper surface of the base plate 5.

[0036]

As described above, the shirako of the present invention is excellent in shock absorption, walking stability and abrasion resistance.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a part of a lantern according to an embodiment of the present invention.

FIG. 2 is a plan view showing the hanoko of FIG. 1;

FIG. 3 is a partially enlarged sectional view taken along line III-III of FIG. 2;

FIG. 4 is a partial cross-sectional view showing a further enlarged cushion portion of the pens of FIG. 3;

FIG. 5 is a cross-sectional view showing a part of a conventional shirako.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pupling child 3 ... Cushion part 5 ... Base plate 7 ... Girder part 9 ... Air bubble

Claims (6)

[Claims] 1. A base plate comprising a plurality of base plates arranged in parallel with a gap therebetween, and a cushion portion laminated above the base plate, wherein the base plate is formed of a hard material and the cushion portion is formed of a soft material. The child of the house. 2. The Asker C hardness of the base plate is 65 or more, and the Asker C hardness of the cushion portion is 60 or more.
2. The nestling of claim 1, which is: 3. The okonomiya according to claim 1, wherein the cushion portion covers the entire upper surface of the base plate. 4. The lantern according to claim 1, wherein the cushion part is formed of a polymer molded body containing air bubbles. 5. The lantern according to claim 4, wherein the upper surface of the cushion portion is a skin layer. 6. The lantern according to claim 5, wherein the surface of the skin layer is embossed.