JP2005144118A - Synthetic resin shelf board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive, light-weight synthetic resin shelf board having excellent bending deflection property when the board is loaded with a load for a long time. <P>SOLUTION: A reinforcement crosspiece is provided with opening portions 11 for fitting reinforcement bodies 6 and at least one hollow hole 5 formed by connecting the opening portion and a hollow portion 13 on one side thereof through an opening path 12. The reinforcement body having a shape ratio (t/h) of thickness (t) to height (h) of less than 0.2 is inserted in the hollow hole. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

Detailed Description of the Invention

Industrial application fields

The present invention relates to a synthetic resin shelf board used for storage equipment such as furniture and vanity.

Conventionally, wooden shelves using lumber, plywood, and particle board have been used as shelves in storage facilities, but they are not only expensive but heavy.

Recently, a synthetic resin shelf board has been proposed, but this shelf board has the advantage of being lightweight and inexpensive, but the bending deflection over time of a long-term load has progressed, and finally the shelf board becomes There is a problem of falling off the dowel. If the shelf itself is made thicker and the resin thickness is made thicker, the above problem can be solved, but the price is high and the drawbacks are scattered.

Prior art

Patent No. 2,916,875 Noda Co., Ltd. Synthetic resin shelf board JP-A-8-103340 (Application published on April 23, 1996) Patent No. 29906443 Nansei Kasei Co., Ltd. Synthetic resin hollow reinforcing plate and reinforcing material used therein

Disadvantages of the prior art

Patent Document 1 is a technique for improving the bending flexibility by inserting a reinforcing material having the same cross section of the hollow hole into the hollow hole of the synthetic resin shelf board. Patent Document 2 describes the width (t) of the hollow hole. Is a technique in which a reinforcing body having a height (h) of 1.5 times or more and having an open top, bottom, left and right side is inserted into a hollow hole.

The former shelf plate is significantly bent and bent during a long-term load. In the latter shelf plate, the load of the reinforcing material to be inserted into the hollow hole of the hollow rail is large. There are high drawbacks.

Object of the invention

An object of the present invention is to provide a shelf board that is light in weight and has little occurrence of bending deflection under a long-term load.

Structure of the invention

The thickness of the hollow hole of the synthetic resin hollow reinforcing bar provided with at least one opening for attaching the reinforcing body and at least one hollow hole formed by connecting the opening and the other end opening with an opening passage A synthetic resin shelf board comprising a reinforcing member having a shape ratio (t / h) between (t) and height (h) of less than 0.2. Hereinafter, the contents of the present invention will be described in detail.

The synthetic resin shelf in the present invention is composed of an upper plate, a lower plate, a side plate, a synthetic resin reinforcing bar formed with a plurality of hollow holes, and a reinforcing body inserted into the hollow hole of the reinforcing bar. Is done.

FIG. 1 shows a perspective view of a synthetic resin shelf board according to the present invention. The synthetic resin hollow reinforcing plate inserted between the upper plate 1 and the lower plate 2 is made of a resin such as polyvinyl chloride resin (PVC), acrylic, polycarbonate (PC), polyethylene terephthalate (PETP), ABS or the like. Then, this is formed into a long plate material by extrusion molding and later cut to an arbitrary width.

FIG. 2 is a cross-sectional view of a synthetic resin hollow reinforcing bar used for improving the bending flexibility of the synthetic resin shelf according to the present invention.
The reinforcing bar 4 used in the present invention has at least one opening 11 used for mounting the reinforcing body 6 and at least one hollow hole 6 in which the opening 11 and the other end hollow part 13 are formed by the opening path 12. Established.

As shown in FIG. 2, the hollow hole 6 formed by the above-mentioned connection molding is used for mounting the reinforcing body 6 and is entirely covered except for the connection opening path with the opening 11. When the aspect of the hollow hole 6 is demonstrated, the opening part 11 may be provided in the right or left, the hollow hole provided, or the opening part 11 in both right and left.

It is preferable that the opening 11 of the hollow hole 6 is at least a hollow portion to which a postscript reinforcing body having a thickness of 5 mm or less can be attached.

FIG. 3 is a perspective view of the above-described reinforcing body. As the reinforcing body, a metal material such as aluminum, iron, steel, and stainless steel is used. Aluminum is particularly advantageous because it has a large Young's modulus despite being lightweight.

Next, the shape of the reinforcing body will be described. The shape ratio (h / t) between the height (h) and the thickness (t) of the reinforcing body is preferably less than 0.2. If this ratio exceeds 0.2, the weight of the shelf board increases, which is disadvantageous in terms of cost.

In the shelf board according to the present invention, the bending deflection amount at a load of 15 kg measured by the bending deflection measuring method defined in JIS 1200 is 5 mm or less, which is as small as 2/3 or less of the conventional shelf board product.

When the present invention is considered as an application of a single-end fixed beam, the bending moment over the beam can be determined by the following equation. That is,
τ = WL / EA
Here, τ = the amount of bending of the beam (cm) W = the load over the beam (kg / cm ² ) E = Young's modulus (kgf / cm ² ) L = the distance from the fixed wall to the load point (cm) A = The cross-sectional area (cm ² ) of the beam.
What is important here is to select a material with a large Young's modulus (εd) in consideration of the density of the reinforcing material and to increase the cross-sectional area of the material. It is possible to obtain a shelf board that is lightweight and has high bending flexibility.

The invention's effect

The synthetic resin shelf board according to the present invention can be expected to be a lightweight and highly rigid shelf board with little bending deflection due to long-term load, because a thin reinforcing material is attached to the hollow hole of the synthetic resin hollow reinforcement board. . Further, as described above, since the load of the reinforcing material is reduced, the production cost can be reduced.

It is a perspective view of the reinforcement body used for the synthetic resin shelf board of this invention. It is a front view of the synthetic resin hollow reinforcement crosspiece used for the synthetic resin shelf board of the present invention. It is a state figure of the reinforcement body inserted in the hollow hole of the hollow reinforcement crosspiece used for the synthetic resin shelf board of this invention.

Explanation of sign

1: Upper plate 2: Lower plate 3: Side plate 4: Hollow reinforcing bar 5: Hollow hole 6: Reinforcing body 7: Shelf plate 8: Dowel hole 9: Reinforcing body height (h) 10: Reinforcing body thickness (t)
11: Reinforcing body insertion part 12: Opening path 13: Other end hollow part

Claims (1)

    In the hollow hole of the synthetic resin hollow reinforcing bar provided with at least one hollow hole formed by connecting an opening for mounting the reinforcing body and the opening and the other end hollow part by an opening passage, A synthetic resin shelf board comprising a reinforcing member having a shape ratio (t / h) between height (t) and height (h) of less than 0.2.

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