JPH075723U - Urethane foam and prototype in which both ends of the uneven pattern are formed flat - Google Patents

Abstract

(57) [Summary] [Purpose] A stable urethane foam in which both ends of the urethane foam, which is the middle material of the mat for betting, are molded into a flat shape. [Structure] A structure in which a prototype 4 is attached to both ends of a rolling roll machine of a processing device for forming unevenness on the surface of a known urethane foam, and the ends of the urethane foam are flat ends.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a urethane foam, which is a middle material for bed mats used in hospitals and ordinary households. Specifically, the surface of a rectangular urethane foam is formed in a concavo-convex shape. Is related to the prototype used for the molding.

[0002]

[Prior art]

 Conventionally, urethane foam has been used as the material inside the bed mat. The user has recognized that it is superior in breathability and cushioning effect to cotton, which has been used since ancient times in Japan. Especially in hospitals, from the viewpoint of management, in addition to the above-mentioned advantages, durability is good and the price is low, and moreover, it is necessary to constantly wash clothes for hygiene management. In that case, compared to cotton, the replacement operation is simpler and easier, so only urethane foam is used as the inner material of bed mats in hospitals.

Since the required amount of the above-mentioned urethane foam has become large in Japan, a manufacturing technique adapted to this condition has been developed and spread. An example of a known technique is manufactured by a method known in Japanese Patent Publication No. 3544, 1954, "Method of forming uneven pattern on sponge rubber plate".

As shown in FIG. 1, the uneven urethane foam is manufactured by inserting a urethane foam having a proper thickness of the raw material into a gap between the upper rolling roll 1 and the lower rolling roll 2 and rotating the same at a suitable pressure. The material is compressed by the concave and convex shape applied to the roll surface of the, and it is divided into concave and convex parts, and the molded urethane foam is processed by the cutting blade 4 provided in the middle of the gap. A urethane foam molded to the specified length and width has been completed, and will be used as an intermediate material that conforms to the shape of the mat.

[0005]

[Problems to be solved by the device]

 Since the urethane foam molded as described above has a continuous concave and convex shape at both ends as shown in FIG. 3, its strength is lowered, it is easily damaged, and its safety is poor. In addition, when covered with side ground, there were problems such as dimensional deviation during the manufacturing process due to unevenness up to the edges, but there was no fundamental development means, which was a major drawback. Therefore, it is a method of gluing flat urethane foam on both sides to the above-mentioned urethane foam without stopping, and it is not easy to improve efficiency because it is made by hand-making one urethane foam. As a result, human rights costs will rise, and a major problem that mass production will not be possible has occurred, and this is an unresolved situation.

[0006]

[Means for Solving the Problems]

 The present invention has been made in view of the above-mentioned circumstances, and an apparatus for processing both sides can be provided during the manufacturing process of a conventional concave-convex urethane foam by attaching the prototypes 3 and 3A to the spindle 5 of a known rolling roll machine. Is. However, it is necessary to have a means for adjusting the pressure applied to the urethane foam depending on the hardness of the urethane foam A and the height of the ridges and valleys.

[0007]

[Action]

 The present invention is a urethane foam that is commonly used. To form a urethane foam that has a thickness of 125 mm and a hardness of 27 kgf, the height of the peaks of the irregularities is 35 mm, and both ends are 62.5 mm. For this, the urethane foam must be compressed with a pressure of 4.2 kg. As a result, the urethane foam A is compressed to about 20 mm to 25 mm.

However, since the flat end portion 6 has the same diameter of the mold used by the concave portion and the convex portion, the bulges at both ends are deformed by the pressure applied to the urethane foam, so that the pressure adjustment and the mold 3 are performed. The width of 3A is set to about 120 mm, and it is adjusted to work evenly. Using this prototype, the urethane foam is compressed from above and below, the main shaft 5 is rotated, and the thickness of the feed source is equally compressed. As a result, the urethane foam has unevenness at the center and both sides are compressed into flat ends. For this reason, large-scale production is possible without requiring any work.

[0009]

【Example】

 An embodiment will be described with reference to the drawings. FIG. 1 shows a state in which a concavo-convex pattern is formed by a known method using a rolling roll machine. The upper rolling roll 1 on both ends of this rolling machine has a master 3 and the lower rolling roll 2 has a master 3A. It is fixed to the main shaft 5.

FIG. 2 is a side view showing a state in which FIG. 1 is sectioned in the direction of arrows B to B. As shown in the drawing, a urethane foam having an appropriate pressure is provided in the gap between the upper rolling roll 1 and the lower rolling roll 2. Is inserted, the main axis of the rolling roll machine is rotated, and the cutting blade 4 cuts from the center to form two urethane foams.

The urethane foam A produced as described above has a thin portion on both the vertical and horizontal sides as shown in FIG. 3 in which a circle is molded in half, and it appears to be thick for sick people. This is a device to eliminate the possibility of giving a shock to a seriously ill person who uses it because it does not exist.

FIG. 4 shows a known rolling mill for molding a urethane foam with a concavo-convex pattern. A main roll 5 has an upper rolling roll 1 and a lower rolling roll 2 each having a concavo-convex surface formed into a mold shape and stacked with a width. It is fitted so that it fits together and is detachably fixed. It is made to be stretchable to accommodate the required urethane foam length. After this is decided, the prototypes 3 and 3A are attached to both ends, they are fixed by the attachment holes 7, the urethane form A is inserted into the gap between the rolls, the roll machine is rotated, and the cutting blade 4 is used for production. It is a thing.

However, in manufacturing, the upper rolling roll 1 should be formed into a shape that is effective when used, and that an appropriate thickness and appropriate cushioning property as well as a simple operation in order to form a flat end should be performed. The outer diameter of the lower rolling roll 2 and the molds 3 and 3A for molding the end portions are required conditions. The embodiment will be described below.

[0014] To make a material having a thickness of 125 mm of urethane foam and a hardness of 27 Kgf, a concave-convex pattern is formed in the central part, the height of the peak is formed to 35 mm, and the flat ends 6 are formed on both sides. Is fitted in the main shaft 5. The outer diameter of the upper rolling roll 1 and the lower rolling roll 2 is at least about 215 mm, and the outer diameter of the master 3B is at least about 190 mm on the upper rolling rolls 1 at both ends of the main spindle 5, and this is attached. Set the urethane foam A in the hole, set the urethane foam A in the gap, apply a pressure of 4.2 Kg from the top and bottom of the roll machine, compress the urethane foam, rotate the main shaft 5, and rotate the urethane foam A. Peeling with the cutting blade 4 while sending out. As a result, as shown in FIG. 6, the urethane foam having unevenness in the central portion and the flat end portions 6 on both sides is mass-produced without requiring skilled workers.

[0014]

[Effect of device]

 The both ends of the urethane foam according to the present invention are machined into flat ends because the round prototype 4 is fixed to both ends of the upper and lower rolling rolls provided with the uneven portions as described above, and the main spindle is fixed. Mass production by rotating and molding is possible, no skill is required, human rights cost is low, and both ends of the manufactured urethane foam are flat, so unevenness is set even if the side is set on the urethane foam. Since it is not on the edge, there is no deviation in the lateral dimension, and the damage to the irregularities is reduced, making it safe to use.

[Brief description of drawings]

FIG. 1 is a front view in which a concavo-convex pattern is formed by resembling a rolling roll machine.

FIG. 2 is a cross-sectional view taken along the arrow BB of FIG.

FIG. 3 is a front view of a urethane foam formed by a known rolling roll machine.

FIG. 4 is a state diagram in which both ends of the urethane foam are finished to be flat surfaces.

FIG. 5 is a front view of a prototype.

FIG. 6 is a perspective view in which both side surfaces of the urethane foam are finished into flat end portions.

[Explanation of symbols]

 A Urethane foam body 1 Upper rolling roll 2 Lower rolling roll 3, 3A Prototype 4 Cutting blade 5 Spindle 6 Flat end 7 Mounting hole

Claims (1)

[Scope of utility model registration request] 1. The shape of the surface of a urethane foam processed and formed using a known rolling roll machine is formed into a rectangular shape in plan view and the surface is formed into an uneven shape, and the right and left ends thereof have an appropriate hardness and an appropriate thickness. A urethane foam having flat end portions 6 each having an appropriate width and formed by a prototype 3 detachably attached to a rolling roll machine. And prototype.