JPH0232433Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a rubber bag, and in particular, a rubber bag having a bias structure reinforcement layer is partitioned along the length, and the reinforcement layer on one side and the outer rubber By providing an elongation suppressing layer between the layers or on the surface of the outer rubber layer, the rubber layer is made to bend when expanded.

[Conventional technology]

Conventionally, rubber bags have been used as regular floats for fish preserves, floats to prevent small fishing boats from capsizing when seining, fenders for ships berthed, and various other uses. The material of this rubber bag is a sheet material with a reinforcing layer coated with rubber on both sides.As the reinforcing layer, fiber cords with a blind weave structure are arranged parallel to the length direction of the rubber bag, or with a plain weave structure. Either unidirectional fiber cords are arranged parallel to the length of the rubber bag, or an even number of fiber cords are alternately crossed in opposite directions along the length of the rubber bag to form a bias structure. Either one of the following installation methods is adopted.

[Problem that the invention attempts to solve]

In conventional rubber bags, no matter which of the above three methods the fiber cords of the reinforcing layer are arranged, the fiber cords of the reinforcing layer are arranged in the same way on the entire surface of the rubber bag. As a result, the following usage problems occurred.

In other words, when the above-mentioned rubber bag is used, for example, as a tube-shaped float, if the fiber cord of the reinforcing layer is arranged in the length direction of the rubber bag and has a blind weave structure, the rubber bag may expand. In some cases, the elongation in the length direction is suppressed and the rubber bag expands in the radial direction.If the fiber cord has a plain weave structure, the elongation of the rubber bag is suppressed in both the length and radial directions and it retains almost its original shape. If the fiber cord has a bias structure, the fiber cord expands in both the length direction and the radial direction.
However, in any of the above cases, the shape of the float when expanded is symmetrical with respect to the longitudinal center line in its original form, so the side wall of the structure to which the float is attached will not be concave or convex. If the float is curved, it is difficult to attach the float to the structure in close contact with the structure, and if the float is forced into close contact with the structure, wrinkles will occur on the float surface on the concavely curved side. This causes fatigue strength to decrease and durability to deteriorate.

Furthermore, when this rubber bag is used as a tool for crimping a curved laminate, the same problem as above occurs because a portion of the rubber bag is forced to curve.

This invention solves the above-mentioned problems and provides a rubber bag that expands by bending or bending the entire length or a portion of the bag with respect to the longitudinal center line in the original state when contracted. purpose.

[Means for solving problems]

The fiber cords of the reinforcing layer of the rubber sheet material for molding the rubber bag have a bias structure in which the fiber cords are arranged to alternately cross in opposite directions with respect to the length direction, and the rubber bag is formed along the length direction. A fiber cord is arranged parallel to the length direction of the rubber bag between the reinforcing layer on one side of the partition and the outer rubber bag, or on all or part of the surface of the outer rubber layer on one side. An elongation suppressing layer is provided which has a woven structure or a plain weave structure by arranging warp cords and horizontal cords parallel to each other in the longitudinal direction and radial direction of the rubber bag.

[Effect]

When the rubber bag is inflated by injecting compressed air, etc., one side, where only the reinforcing layer of the bias structure is provided, stretches in the length direction and radial direction of the rubber bag, but an elongation suppressing layer is provided. On the other hand, with the blind weave structure, elongation in the longitudinal direction is suppressed, and with the plain weave structure, elongation in both the longitudinal and radial directions is suppressed. If the elongation suppressing layer is provided on the entire surface of one side, the elongation suppressing layer will contract and deform and become curved in a concave shape.If the elongation suppressing layer is provided on a part of the surface of one side of the rubber bag, the elongation suppressing layer will shrink and deform. The portion where is not provided is bent and deformed toward the elongation-suppressing layer side, resulting in a bent state.

〔Example〕

1 to 4 show examples in which this invention is applied to a float.

FIG. 1 is a partially cutaway plan view showing the float of this invention in its original state when deflated. This float 10 has cover sheets 12 on both ends of a float body 11 formed into a tube-shaped hollow body.
They are covered and glued together to form an airtight seal. The float body 11 is provided with an inlet/outlet 13 for an expansion medium such as compressed air.
In addition, cover sheets 1 at both ends of the float body 11
2 is provided with a hole 14 for passing a rope through, and a reinforcing band (not shown) is provided on the outer periphery of the float body 11.
They are bonded circumferentially at appropriate intervals.
This reinforcing band has flanges with holes for rope passage glued at multiple locations, so that when the float 10 is used on a structure such as a fishing boat,
Rope passing holes 1 at both ends of the float body 11
4 and the rope passage hole of the reinforcing band to be moored.

The float main body 11 described above is formed of a sheet material in which the inside and outside of the reinforcing layer 15 are covered with an inner rubber layer 17 and an outer rubber layer 18, respectively. Center line O
The main body portion A on one side, which is partitioned along the length direction by a plane including -O (perpendicular to the paper surface), has an elongation suppressing layer 19 interposed on the entire surface between the reinforcing layer 15 and the outer rubber layer 18. It is provided.

FIG. 2 shows the structure of the reinforcing layer 15 of the float body 11, in which the fiber cords 16a, 16b of the two reinforcing layers 15a, 15b are alternately crossed in opposite directions with respect to the length direction of the float body 11. It has a bias structure. In the figure, reference numeral 17 indicates an inner rubber layer, and reference numeral 18 indicates an outer rubber layer. As the rubber material for the inner and outer rubber layers 17 and 18, a material with excellent weather resistance and corrosion resistance is used.
It is preferable to use synthetic fibers such as nylon, polyester, and aromatic polyamide for a and 16b.

The number of reinforcing layers 15a and 15b may be two as shown in the figure, but may be increased (an even number of layers) as required to increase the strength of the float body 11.

FIG. 3 shows the structure of the elongation suppressing layer 19 in the main body part A on one side of the float main body 11, and FIG. One of the fiber cords 20a in the warp direction of the plain weave structure,
This is a case in which the fiber cords 20c having a blind weave structure woven in one direction are arranged parallel to the length direction of the float body 11.
This shows the case where it is arranged parallel to the length direction.

The fiber cord of the elongation suppressing layer 19 is as follows:
As with the reinforcing layer 15, it is preferable to use synthetic fibers such as nylon, polyester, and aromatic polyamide.

FIG. 4 shows a state in which the float 10 having the above structure is attached to a structure 30 having a convexly curved side wall.

With the float 10 in the contracted state, the side surface of the main body part A on the elongation suppressing layer side of the float 10 is suspended along the side wall of the structure 30, and the rope passing hole 14 at both ends and the rope of the reinforcing band (not shown) are suspended. After the rope 31 is passed through the through hole and moored to the structure 30, compressed air or the like is injected at a predetermined pressure from the injection port 13 to inflate it. Due to the internal pressure of this inflation gas, the side surface of the float 10 opposite to the structure 30 is provided with a reinforcing layer having a bias structure, so that the float 10 extends in the length direction and the radial direction. However, since an elongation suppressing layer with a blind weave structure or a plain weave structure is disposed on the side surface of the float 10 on the side of the structure 30, the elongation of the float 10 in the length direction is suppressed regardless of which elongation suppressing layer is used. As a result, as shown in the figure, the side surface of the float 10 on the structure 30 side becomes concavely curved. In this way, the float 10 can be attached in close contact with the shape of the side wall of the structure 30 without reducing the strength of the sheet material, so the durability of the float 10 is greatly improved.

FIG. 5 shows another embodiment of this invention, and shows an example of use as a crimping tool.

The crimping tool 25 of this embodiment is formed into a flat sealed hollow body, and has an inner rubber layer 17 and an outer rubber layer 1 on both sides of the reinforcing layer 15, which has a bias structure as a whole.
The structure formed by the sheet material covered with 8 is the same as that of the float of the above embodiment, but
The elongation suppressing layer 19 is formed between the reinforcing layer 15 and the outer rubber layer 18 on one side partitioned in the length direction.
It is provided only on a part of the surface from one end to an appropriate length.

In addition to gas such as compressed air as an expansion medium, high-pressure liquid such as pressurized water is injected into the crimping tool 25 having the above-mentioned configuration for expansion. Due to the internal pressure of the expansion medium, the side surface opposite to the elongation suppressing layer 19 side stretches in the length direction and the radial direction, but the elongation suppressing layer 19 is not provided on the side surface on the elongation suppressing layer 19 side. Since only the free end portion 26 stretches in the same way, it is bent toward the elongation suppressing layer 19 side, as shown in the figure.

The above-mentioned crimping tool 25 can be used, for example, when a plurality of boards with curved tips, such as skis, are superimposed and crimped.

In each of the above embodiments, the case where the elongation suppressing layer was provided between the outer rubber layer and the reinforcing layer was explained, but the elongation suppressing layer may be provided on the surface of the outer rubber layer, and even in this case. A rubber bag that expands by bending is obtained in the same manner as described above.

[Effect of idea]

As explained above, according to this invention, by providing an elongation suppressing layer on one side of the rubber bag,
Since the entire length or part of the rubber bag can be curved or bent toward the elongation-suppressing layer side with respect to the longitudinal center line in its original form, it can be used as a float or fender to be attached to a structure with a curved shape. When used as a rubber bag, it not only becomes a highly durable rubber bag, but also a rubber bag that is highly useful as a tool for crimping curved laminates.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway plan view showing an embodiment of this invention; FIG. 2 is a side view showing the structure of the reinforcing layer;
3a and 3b are side views showing the structure of the elongation suppressing layer, FIG. 4 is a plan view showing the usage state of the embodiment of FIG. 1, and FIG. 5 is another embodiment of the invention. FIG. In the figure, 10 is a float, 13 is an inlet for expansion medium, 15 is a reinforcing layer, 16a and 16b are fiber cords of the reinforcing layer, 17 is an inner rubber layer, 18 is an outer rubber layer, 19 is an elongation suppressing layer, and 20a , 20b, 20c
25 is a fiber cord of the elongation suppressing layer, and 25 is a crimping tool.

Claims (1)

[Scope of utility model registration request] A closed hollow body having an inlet for an inflation medium, the reinforcement layer having a bias structure in which fiber cords are alternately crossed in opposite directions along the length of the hollow body, and rubber is coated on both sides of the reinforcement layer. In a rubber bag formed from a sheet material covered with a layer, between all or a part of the surface of the reinforcing layer and the outer rubber layer in one side of the rubber bag partitioned along the length direction, or on the outside On the surface of the rubber layer, fiber cords with a blind weave structure woven in one direction are arranged parallel to the length direction of the rubber bag, or warp cords and horizontal cords are interwoven one by one. 1. A rubber bag characterized in that a unidirectional fiber cord having a plain weave structure is provided with an elongation suppressing layer interposed therebetween, which is arranged parallel to the length direction of the rubber bag.