JPS5914125B2 - Hollow shell type fencing material and its manufacturing method - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hollow shell type fencing material and its manufacturing method, and in particular, to effectively improve the stability of this type of fencing material when it is attached to a ship, and to improve its performance. The object of the present invention is to provide an advantageous manufacturing method for a fencing material.

Hollow shell type fencing consists of a rubber bag molded into a hollow cylinder with an appearance similar to a rice bag.The inside of the bag is inflated, and the attachments at both ends are connected to metal fittings such as chains. By hanging and holding it on a quay surface, it is often called a pneumatic protection material because it is mainly used to alleviate and absorb the impact of collisions with ships.

Instead of suspending and holding the bag with a chain as described above, the net was wrapped in a net and locked to hold it, but due to the repulsive force generated in the rubber bag due to the contact situation with the side board of the ship, the mounting position on the quay surface was changed. Therefore, as shown in Figure 1, a wide restraining strap is used to surround approximately half of the rubber bag f, and this restraining strap is also placed on the quay. It is often screwed onto surface q.

However, in this case, in order to prevent the rubber bag f from shifting laterally, the locking device C such as a chain cannot be omitted, and therefore, the locking device C such as a chain works in various directions (the attachment to restrain the rubber bag f under contact impact requires the use of a metal fitting i). This has the drawback that stress concentration tends to occur in the rubber bag f, which often causes damage to both ends of the rubber bag f, resulting in a loss of fire prevention performance.

On the other hand, in order to form the rubber bag f into the rice bag-shaped hollow cylinder, generally a core material such as a paper mold is used, and an unvulcanized rubber sheet is pasted around it to form a body wall and one end wall. The process of removing the core body and forming the other end wall takes time and effort, and the work procedure is troublesome, which increases the number of man-hours and increases the cost. Because of this, the chain had a circular cross section, which caused the chain to roll against the quay wall when it was hitched or hit by waves, causing the chain to twist, or the chain to become twisted due to the impact of the hitch.

Note that if the net used instead of the chain is damaged, the rubber bag f may be washed away.

This invention overcomes the various problems with the so-called conventional pneumatic fencing materials mentioned above, and can be stably and securely mounted on a quay surface using a cylindrical shape, without using chains or nets at all. In particular, it is extremely easy to pressurize with a simple flat press, excluding the difficulties in the manufacturing process.
It also proposes development results for adapting to mass production with uniform quality.

This invention has a hollow fuselage whose main body is closed at both ends, and a pair of wing pieces that extend integrally over the entire length of the fuselage shell, and these hollow shell and wing pieces are made of rubber or rubber with a reinforcing cloth embedded therein. Hollow shell fencing consisting of a single molded body of rubber-like elastic material, as well as the inner surface of a hollow shell closed at both ends, from which a rubber or rubber-like elastic material sheet with reinforcing fabric is to be formed. a laminated molding step in which the area and the overhanging separation area of the pair of wing pieces that are to be integrated with the fuselage shell are subjected to non-adhesive treatment and folded, and this laminated molded product is sandwiched between hot plates of a flat press and heated. This is a manufacturing method for a hollow shell type fender that is combined with a curing stage that applies downward pressure.

In this invention, both ends of the hollow shell are, in particular,
Needless to say, there are cases where the parts are glued together in a straight shape like at the tail end of a training polishing tube, and the necessary reinforcement is applied as appropriate to increase the adhesive strength.

Fig. 2 shows how the hollow hull protection material according to the present invention is attached to a quay wall. The bent edges are attached, 4 indicates attachment bolts, 5 and 6 are internal reinforcements of the hollow shell 1 and the wing pieces 2, and 7 is a single-letter closed end at both ends of the hollow shell 1.

The hollow fuselage shell 1 and the wing pieces 2 are integrally molded by heating and pressing using a flat press as described below.

That is, in FIG. 3a and FIG. 4a, 8 and 9 are press hot plates, 10 is a frame mold, and inside this frame mold 10, the inner surface reinforcement 1 is
As 1, rubberized cloth such as threads or cords of various organic fibers or steel cords are layered with a release agent layer 12 sandwiched between them, and unvulcanized rubber sheets are placed on top and bottom with the layer 12 in between.
3.14, and surrounding these with a rubberized cloth similar to the above as the internal reinforcement 16 under the sandwiching of the mold release agent layer 15 leaving at least a part of the upper surface It is surrounded by a sulfur rubber laminated sheet 17, and a mold release agent layer 18 is also sandwiched between the opposite edges thereof, and then pressure is applied between hot plates 8 and 9 to heat and vulcanize.

The inner reinforcement 11 is preferably woven into a cylindrical shape, pressed as shown in the figure, and folded back at both ends if necessary, but it may also be simply made of two layers.

After the molding and strengthening process described above, the mold release agent layers 12, 15 and 18 are separated and the inside is filled with air. can be,
Note that 19 in the figure is an air inlet.

In the pneumatic shielding material of the present invention obtained as described above, the impact receiving part 20 facing the hull side of the ship is connected to the hollow hull 1,
It is doubly reinforced by the reinforcement embedded in each of the wing pieces 2, and its durability is significantly enhanced.In addition, the reinforcement layer is thick enough to withstand a collision with a sharp tip, as shown in Figure 5. The presence of rubber generates compressive stress on the surface of the impact-receiving portion 20, which advantageously resists cuts caused by sharp edges, and is advantageous in improving cut resistance and durability.

Note that when double reinforcement in the impact receiving part 20 is not required,
As shown in FIG. 6a, a release agent layer 12' is further added to the rubber sheet 21 provided with the inner surface reinforcement 11' on the side of the inner surface reinforcement 11', and a pair of release agent layers 22, 23 are formed on both sides, respectively. Using the freshly prepared mold release agent layer 24, fold it in three and laminate it on the sand-inch structure rubber sheet 17' with the internal embedded reinforcement 16' sandwiching the mold release agent layer 25 between them. Pressure is applied under heat in the same manner as above, and after vulcanization and curing, the mold release agent layer 12' is formed.
, 24 and 25 are filled, and the sixth
A hollow body shell 26 in the shape of a rectangular tube as shown in the figure may be formed.

In the figure, reference numeral 7' indicates a closed end formed in the shape of a letter at both ends of the rectangular tube, and there is a mold release agent layer 12' thereon.

It is formed by not applying 24 and 25.

As mentioned above, the hollow shell type protection material of the present invention can be easily produced by a simple molding method such as pressurization (in addition, the hollow shell that acts as an impact receiving part is integrated with the wing). Since the mounting part is provided in the form of a piece, there is no need for suspension support like conventional protection materials of this type, and the installation exhibits high stability against contact impact, and the suspension support means or The chances of damage to the barrier material are reduced and its durability can be advantageously enhanced.

Furthermore, according to the present invention, the hollow shell type fencing material does not require any time-consuming molding methods such as stone molds or mandrels, which were indispensable in the past, or even the use of large vulcanization cans. It can be manufactured simply by vulcanization treatment using a simple flat press.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a typical example of a conventional hollow shell type fencing material, FIG. 2 is a perspective view showing the installation attitude of the hollow shell fencing material according to the present invention, and FIG. 3a. 4b is a cross-sectional view before and after vulcanization, FIGS. 4a and 4b are similar cross-sectional views of another example, and FIG. 5 is an explanatory diagram of deformation behavior due to sharp projections of the impact receiving part FIGS. 6a and 6b are sectional views before and after vulcanization of yet another embodiment. 1...Hollow fuselage shell, 2...Wing piece. 22-

Claims (1)

[Scope of Claims] 1 The main body is a hollow shell whose both ends are closed and is provided with a pair of wing pieces that extend integrally to both sides of the shell, and the hollow shell and the wing pieces have reinforcing fabric embedded therein. A hollow shell type protection material made of a single molded body of rubber or rubber-like elastic material. 2. An area corresponding to the inner surface of a hollow shell whose ends are closed by compressing a sheet of rubber or rubber-like elastic material with reinforcing cloth, and an overhang of a pair of wing pieces that are to be integrated with the shell. A hollow shell type fencing material that combines a laminated molding stage in which a non-adhesive treatment is applied to the separation area and folding, and a curing stage in which the laminated molded product is sandwiched between hot plates of a flat press and pressurized under heat. manufacturing method.