JPH0615007Y2 - Side edge of plate structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a side edge made of synthetic resin, which is attached to the side peripheral edge of a plate, a kotatsu plate or other plate-like structure, and is particularly extruded. The present invention relates to a side edge of a type in which a long side edge molding member is cut into a predetermined length for use and has a reduced shrinkage ratio.

(Prior Art) Conventionally, a side edge made of a synthetic resin, which is attached to a side peripheral edge of a plate-shaped structure such as a table or a kotatsu plate, has a substantially T-shaped cross section by an edge body portion and a fitting attachment portion. The side edge molding member is extruded so as to form a long length, and the long side edge molding member is cut into a predetermined length, and the fitting attachment portion is fitted and fitted in the fitting groove formed in the side peripheral edge portion of the table or the like. .

The side edge made of synthetic resin of the above-mentioned type is molded with hard or soft synthetic resin, but if it is necessary to bend at the corner of the plate-like structure at the time of mounting, a semi-hard or soft one is used. It

(Problems to be solved by the invention) However, in the conventional synthetic resin side edge,
There is a drawback that the whole shrinks due to heat and aging, and voids are generated at the joint ends.

As a shrinkage prevention means, there is a method of annealing an extruded molded member until the shrinkage becomes stable, but this increases the number of manufacturing processes and takes time and cost, and also sufficient results can be obtained. It has the drawback of not having it. For this reason, in some types of tables, etc., metal wire rods are installed inside and the peripheral edge is edge-pressed with a metal band, but this is not easy to cut, and the joint end after attaching the side edge is not easy. In some cases, they are fused, but this causes a significant increase in cost due to an increase in man-hours and the number of parts.

Conventionally, there is a soft synthetic resin molded product in which glass fibers are arranged as a core material, but the purpose of this glass fiber core material placement is to increase the tensile strength of the soft synthetic resin molded product such as a string and a belt. It was to raise it.

The present inventor put various fiber core materials inside the side edge and conducted various experiments. As a result, a plurality of glass fiber yarns were extruded while being sequentially fed into the molding die to form a plurality of fiber fibers in the side edge. It was found that heat shrinkage does not occur at all or is significantly reduced when the glass fiber core material (1) is placed in a well-balanced manner along the longitudinal direction.

Therefore, the object of the present invention is to eliminate the above-mentioned conventional drawbacks, to simplify the manufacturing, to significantly reduce the shrinkage in the longitudinal direction due to temperature change and aging, and to reduce the cost. To provide side edges of the structure.

(Means for Solving the Problems) The side edges of the plate-like structure according to the present invention are extruded from a synthetic resin, and the fitting mounting portions formed on the sides are provided on the side of the plate-like structure such as a table. At the side edge adapted to be fitted and fitted in the fitting groove formed in the peripheral portion, the edge main body and the fitting mounting portion projecting from the edge main body are formed into a substantially "T" -shaped cross section, At the time of this extrusion molding, by extrusion-molding while sequentially feeding a plurality of glass fiber threads into the molding die, a plurality of glass fiber core threads are lengthened to either the edge body part or the fitting attachment part. The interiors are arranged parallel to each other along the direction.

(Operation) As described above, the side edge is formed to have a substantially T-shaped cross section by the edge main body and the fitting attachment portion, and is extruded from the semi-rigid synthetic resin. Inserting a plurality of glass fiber threads at a predetermined interval into the mold part to be molded or the mold part in which the fitting attachment part is molded by any suitable means,
Extrusion molding is performed while feeding the glass fiber yarn in synchronism with the molding speed. As a result, a plurality of glass fiber core yarns are provided inside the edge body portion or the fitting attachment portion of the side edge in parallel with each other along the longitudinal direction.

A soft synthetic resin layer may be formed on the outer surface side of the edge body in order to improve the cushioning properties of the outer surface of the side edge.In this case, the semi-hard and soft composite extrusion is performed, but the core yarn is The interior should be located in the semi-rigid area.

In this way, in the side edge, in the example, a sample in which core fibers of glass fiber were installed in parallel in the edge body was prepared, and the heat shrinkage in the longitudinal direction was measured by cutting to a predetermined length. As is clear from the experimental data, no heat shrinkage was observed even under high temperature conditions, and an excellent heat shrinkage prevention effect was obtained.

In this way, the effect of suppressing heat shrinkage by incorporating a glass fiber core yarn that is a soft material in the semi-hard portion is that the thermally stable glass fiber is a yarn, and the semi-hard synthetic resin and It is considered that this is due to the improved binding property of No. 1, so that thermal contraction is expected to be extremely small even at other side edges different in size and thickness from the sample.

In the side edge configured as described above, when bent at the corner portion of the plate-like structure when attached to the side peripheral edge of the plate-like structure such as a table, the core fiber contained therein is a glass fiber yarn. There is no hindrance to the bending operation.

(Embodiment) Embodiment 1 of the side edge of the plate-like structure according to the present invention
A description will be given with reference to FIGS. FIG. 1 is a cross-sectional view showing a mounted state of a side edge, and FIG. 2 is a cross-sectional view showing another configuration example.

In the figure, reference numeral 1 denotes the entire side edge, and the cross-sectional shape is formed by a substantially strip-shaped edge main body 2 having an arcuate outer surface and a fitting mounting portion 3 projecting in the center of the back surface side of the edge main body 2. It has a substantially "L" shape, and a plurality of stages of engaging claws 4 are formed on both sides of the fitting attachment portion 3.

In this embodiment, the side edge 1 is extruded from a semi-hard synthetic resin having a hardness of about 70 ° to 80 ° Hs. At this time, the inside of the mold or the fitting mounting part where the edge body is to be formed is formed. A plurality of, in the example, five twisted or untwisted yarns of glass fiber are inserted at a predetermined interval into any one of the mold parts by an appropriate means, and the glass fiber yarn is synchronized with the molding speed. Extrude while feeding. As a result, five glass fiber core threads 5 are provided inside the edge body 2 or the fitting attachment portion 3 of the side edge in parallel along the longitudinal direction. The long side edge molding member thus molded is cut into a predetermined length, and the fitting attachment portion 3 is fitted into the fitting groove 12 formed in the side peripheral edge portion of the plate-like structure 11 such as a table. They are attached together.

In the example shown in FIG. 1, the entire side edge 1 is extruded and molded by a soft synthetic resin, and the core yarn 5 is provided inside the edge body 2. However, it goes without saying that the core thread 5 may be internally provided in the fitting attachment portion 3.

In the example of FIG. 2, a soft synthetic resin layer 6 is formed on the outer surface side of the edge body 2 formed of a semi-hard synthetic resin in order to make the outer edge of the side edge 1 have a good cushioning property. . In the side edge 1 shown in FIG. 2, the soft synthetic resin and the semi-hard synthetic resin are compositely extruded to form the soft synthetic resin layer 6, but in this case as well, the core yarn 5 is located in the semi-hard portion. Should be placed in

The number of glass fiber yarns, the distance between yarns, etc. should be appropriately set according to the size of the side edge to be molded,
In addition, since the cross-sectional shape and the like may be slightly different, it is set correspondingly. The method of inserting the threads is arbitrary, and each thread may be coated with an adhesive and inserted, or a plurality of parallel threads may be prepreg-processed with a resin to form a tape.

Next, the side edge 1 shown in FIG. 1 was compared with that of a conventional one having the same size and cross-sectional shape and not including the core fiber 5 of glass fiber. It was the street.

The width of the side edge 1 is 20.4 mm, and the edge style part 2
Has a maximum wall thickness of 4.5 mm, and the fitting mounting portion 3 has a length of 10 mm. The annealing conditions were a temperature of 100 ° C. and a time of 1 hour, and the change in length before and after the heating was measured. The cooling was carried out naturally, and after a lapse of time, it was taken out of the furnace and allowed to stand at room temperature.

In the table, No. in the left column is a sample number, and three types of samples having different lengths were prepared.

L1 is the length before heating, L2 is the length after heating, and the shrinkage amount R is L1-
L2, Is.

As is clear from the above comparative measurement results, it is recognized that the side edge according to the present invention has no heat shrinkage and is extremely stable. Therefore, it can be easily assumed that the heat shrinkage is small even if the edge is larger than the side edge.

(Effect of the Invention) According to the side edge of the plate-shaped structure according to the present invention, a plurality of glass pieces are provided inside either the edge main body portion or the fitting attachment portion of the side edge extruded and molded by the synthetic resin. Since the fiber core yarns are installed in parallel along the longitudinal direction, it is possible to eliminate or extremely reduce the heat shrinkage as is apparent from the comparative test data. This eliminates the need for repeated annealing work due to high temperatures, the process of fusing the joint ends after attachment, and the process of holding down the edges with a metal band, thus significantly reducing costs and simplifying the configuration. In addition, there is an effect that it is easy to cut into a predetermined length.

[Brief description of drawings]

The drawings show an embodiment of the side edge of the plate-like structure according to the present invention. FIG. 1 is a sectional view showing a mounting state of the side edge, and FIG. 2 is a sectional view showing another configuration example. 1: Side edge, 2: Edge body part, 3: Fitting attachment part 4: Engaging claw, 5: Core thread, 6: Soft synthetic resin layer 11: Plate-like structure, 12: Fitting groove

Claims (1)

[Scope of utility model registration request] 1. A side formed by extrusion molding of a synthetic resin, wherein a fitting attachment portion formed on a side portion is fitted and attached to a fitting groove formed on a side peripheral edge portion of a plate-like structure such as a table. In the edge, the side edge is made of a plurality of glass fibers embedded in either the edge body portion, the fitting attachment portion projecting from the edge body portion, or the edge body portion or the fitting attachment portion. A side edge of a plate-like structure, comprising a core thread, and the glass fiber core threads are arranged in parallel to each other along the length direction of the side edge.