JPS6154662B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filler used as an explosion suppressant filler in containers containing fuel and other explosive fluids.

British Patent No. 1,131,687 describes an explosion-suppressing padding consisting of a plurality of wire meshes formed by interconnecting metal ribbons that are misaligned with the base surface of the wire meshes. There is. Such a net can be manufactured by a metal stretching method using a reciprocating or rotating metal stretching machine. Either type of machine may be used to produce a stretched or expanded wire mesh consisting of interconnected strands whose mesh openings are diamond-shaped and which are inclined to the general plane of the metal. metal can be manufactured.

Expanded metals made by reciprocating and rotary metal expanding machines generally have slightly different shapes. This specification relates to expanded metal (stretched wire mesh) supplied from a stretching machine that stretches rotary slit metal (foil),
Primarily described, the invention particularly relates to fillings made from this expanded metal and methods of making the same.

However, applicants have found that such paddings formed from multiple layers of expanded wire mesh often have an unduly high bulk density. In particular, coiled scrolls (i.e. fillers) according to an economical method of manufacture are formed by coiling wrought aluminum foil of the mesh and strand dimensions specified in the above-mentioned GB 1131687. 52.4, the single roll thereby obtained is normally recommended in the British patent specification.
This results in a bulk density that exceeds the value of Kg/ ^m3 . In order to minimize the weight added by the explosion suppressant filler, its bulk density must be kept low.

Furthermore, since such fillings tend to compact under pressure, their density tends to fluctuate and become uncontrollable. The bulk density at any given time will therefore vary as a result of the pressures exerted on the filling during its manufacture or subsequent transportation or filling it into containers for fuel or the like.

According to the present invention, it has been found that a filling having a stable and low bulk density can be obtained by arranging a plurality of sequentially overlapping layers of expanded wire mesh in the following manner. That is, the slope of the strands within each layer is opposite to that of the strands of the adjacent layer. If similar layers of expanded wire mesh are stacked one on top of the other, edge-to-edge, when pressure is applied to the filling, these layers will fit closer together in response to that pressure. Will. In contrast, if each layer is arranged such that the strands in adjacent layers are oriented in opposite directions, the oppositely slanted strands engage each other in a manner that causes the layers to be more widely separated. It became like this,
A highly resilient, flexible, low bulk density filling is thus obtained which does not become permanently compacted.

Furthermore, the applicant has proposed that multiple layers of conventional expanded wire mesh can be combined into one layer.
In the process of assembling individual multilayer fillings, successive overlapping layers may be slightly displaced from each other in the same lateral direction as a result of the above-mentioned fit, and the final completed filling may have sloped end faces. I discovered that. For example, when a rotating slit-shaped stretched wire mesh is coiled in the longitudinal direction to form a single roll, the wire mesh is shifted laterally in the direction of the coil axis each time it is wound. Thus, the coiled scroll has a conical protruding end surface at one end and a conical concave surface at the other end.

Ordinary fuel containers generally have flat walls. At least its top and bottom surfaces are flat. Therefore, in order to provide satisfactory anti-explosion protection, it is required that the filling substantially completely fills the interior of the container, leaving no voids in which an explosion could occur. It is clear, therefore, that such a filling having conically inclined ends cannot be used satisfactorily as it is. That is, if such a filling were to be used as is in a container, the contour of the filling would not match the internal contour of the container, leaving an unprotected void space between the two.

According to the invention, the filling consists of a plurality of layers of expanded wire mesh, the strands of which are inclined with respect to the base of each layer, in which a plurality of successively overlapping layers are
Consisting of a number of layers of expanded wire mesh having strands inclined with respect to the base plane of the layers, characterized in that the strands in each layer are arranged so as to be inclined in the opposite direction to the strands in adjacent layers. It provides filling.

When the stuffing is formed as a coiled roll of a series of elongated wrought wire meshes, the above-described desired layer configuration of the present invention is such that when the first wrought wire mesh is supplied, the first wrought wire mesh is This is obtained by additionally supplying a second wrought wire mesh with strands inclined in the opposite direction to the inner strands from an additional supply and joining it with the first wrought wire mesh.

This second wrought wire mesh is made by winding the same wire mesh as the first wrought wire mesh once, then turning it over so that both ends of the coil are switched, and then overlapping this wire mesh with the first wrought wire mesh. It can be provided as if it were supplied in a relationship.

The desired strand orientation can also be obtained by sequentially folding a series of elongated wire meshes in a fan fashion along fold lines extending parallel to the direction in which the strands are inclined. In this case, the fold line is in the transverse direction in the case of a rotating slit-stretched wire mesh, and in the longitudinal direction in the case of a rolled wire mesh fed from a reciprocating stretching machine. Furthermore, when a long length of expanded wire mesh is cut into a number of equal pieces and stacked one after the other to form a multilayer filling, the desired strand orientation can be achieved prior to stacking. Similar results can be obtained by inverting the pieces every third time.

The invention will now be described in more detail with reference to illustrated examples.

In FIG. 1, one continuous long stretched wire mesh 10 is, for example, a Japanese patent application filed in 1978.
It is supplied from a spreading machine described in No. 22879 (Japanese Patent Application Laid-Open No. 118377/1983), which spreads rotary slit metal. This expanded wire mesh 10 is wound onto a spindle 12 to form one roll 11. As seen in FIG. 2, the expanded wire mesh 10
are constituted by interconnected metal strands 13 inclined parallel to each other in a direction substantially transverse thereto.

A second long stretched wire mesh 1 which is a similar stretched wire mesh
4 is inserted into and overlapped with the first expanded wire mesh 10 when the first wire mesh is wound up on the spindle 11. The second wrought wire mesh 14 has been previously wound up and is fed from a supply reel 15 rotatably supported above the first wrought wire mesh 10. As can be seen in FIG. 2, the mesh of the second wrought wire mesh 14 has its strands 16 laterally inclined in the opposite direction with respect to the strands 13 of the first wrought wire mesh 10.

Thus, in a completed roll 11, the strands of adjacent layers slope in opposite directions in the transverse direction, as schematically shown in FIG. In FIG. 2, the direction of the strand 17 constituting the next turn of the first expanded wire mesh 10 in the scroll is indicated by a broken line.

The second supply reel 15 may be one that takes a portion of the first expanded wire mesh 10 sent out from the expanding machine and separately winds it up in advance. In this case, the pre-wound reel is such that when the second wrought wire mesh 14 is rolled out, the strands 16 thereof are inclined in the opposite direction to the strands of the first wrought wire mesh. Turn both ends of the reel once so that the reel is in the correct position.

Another method is to use two separate stretching machines for the rotating slit metal, one of which is the first stretched wire mesh 1.
0 may be supplied, and the other may supply the second expanded wire mesh 14. In this case, the spreading arms of one spreading machine are tilted in the opposite direction to the spreading arms of the other spreading machine, so that the strands of the resulting mesh are oriented in opposite directions with respect to each other.

As shown in FIG. 1, the overlapping first and second stretched wire meshes 10 and 14 are cut longitudinally using a pair of upper and lower cutter disks 18 that rotate in opposite directions before being rolled up. It may be cut and separated into several segments in the direction. This makes it possible to obtain a shorter scroll segment 11a that matches the internal dimensions of the container for fuel or the like in which it is packed as an explosion-suppressing filler.

If, unlike the present invention, the second expanded wire mesh 14
The step of inserting and overlapping the first wrought wire mesh 10 on the first wrought wire mesh 10 is omitted, and the first wrought wire mesh 1 is
If the wire mesh layers were wound directly on top of each other, the wire mesh layers would be tightly interlocked with adjacent strands in close alignment. This increases the bulk density of the finished filling. Moreover, even if the edges of the successive layers are initially aligned closely, each layer will be aligned with the other as a result of the close interlocking and mating of the slanted meshes described above. This will cause a shift, and the final scroll will have a conical convex surface on one end and a conical concave surface on the other end. As can be seen from FIG. 2, by interposing the second wrought wire mesh 14, the actual spacing between each layer of the wrought wire mesh is increased;
There is therefore no tendency for the layers to interlock with each other. If the above-described joining method is used, the bulk density of the roll obtained will be approximately two-thirds of that obtained when the second stretched wire mesh is not joined.

FIG. 3 shows a series of elongated stretched wire mesh folded in fan fashion. Like the stretched wire mesh 10, the expanded wire mesh 19 has strands that are inclined in a direction transverse to the longitudinal direction. This long stretched wire mesh 1
9 are alternately folded along regularly spaced folding lines 20. The resulting layers within the filling 21 are alternately inverted, so that the strands of each layer are sloped in opposite directions with respect to the strands in adjacent layers.

Yet another embodiment is shown in FIG. Again, the web of the series of wrought wire mesh 22 has its strands sloped in the direction across the web, similar to wrought wire mesh 10 described above with respect to FIG. This web is cut along transverse cutting line 23 to length. The cut square sections are then stacked one on top of the other to form a square filling 24. During this stacking, every other section is turned so that the slope of the strand is opposite to the strand of the previous section. To obtain this desired strand orientation, every other section is either inverted around the transverse axis 25 as shown by arrow 26 or in its plane around the vertical axis 27 as shown by arrow 28. It can be rotated by 180 degrees.

By arranging multiple layers of expanded wire mesh so that the strands of adjacent layers slope in opposite directions, the mutual engagement of the oppositely sloped strands is controlled by the layers of the filler. It works to prevent lateral slip and stabilizes the filling. If lateral layer slippage were to occur, the shape of the filler would be distorted during manufacturing or subsequent steps. Furthermore, the interengagement of the strands serves to prevent interlocking of the layers and to provide sufficient separation of the materials of adjacent layers. Thus, the overall filling density is reduced compared to one in which all strands are slanted parallel to each other, and significantly reduces the weight of material required to fill a container of a given volume. It becomes possible to reduce the amount to

The filling obtained according to the invention can be used as is as a filling inside a fuel container or other container for flammable or explosive fluids, or it can be of any suitable size or shape to match the internal shape of the container. It can be trimmed to.

The filling of this invention can have a low bulk density. Furthermore, this filling is dimensionally stable and has a highly spring-like, resilient character. This allows the filling to better withstand the stresses applied to it when it is manipulated or cut into the desired shape, and therefore allows the filling to fit into fuel tanks of special contours. I can do it.
In other words, the filler can be substantially completely filled inside the fuel container without leaving any voids inside the fuel container.
Containers with such a filling will therefore have a satisfactory explosion suppression effect.

The scroll segment 11a shown in FIG. 1 can be used as is, for example, in a conventional cylindrical fuel can, such as a gasoline can.

FIG. 5 shows a metal gasoline can 29 in the form of a cylindrical container with a fill spout provided with a spout 31. FIG.
The interior of the can body is filled with rolled segments 11a of expanded wire mesh. During manufacture of this can, the segment 11a has a lid 32 that closes the top of the container 29.
is inserted inside the can before attaching it.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention in which a stretched wire mesh is formed into one roll. FIG. 2 is a sectional view taken along the line - of FIG. FIG. 3 shows an embodiment using the fan-like folding method.
FIG. 4 shows an embodiment using the stacking method. FIG. 5 shows an example of a fuel container containing an explosion suppressant filler. [Explanation of symbols of main members], 10... Layer of expanded wire mesh (first expanded wire mesh), 14... Layer of expanded wire mesh (second expanded wire mesh), 13, 17... First Strand of expanded wire mesh, 16...Second strand of expanded wire mesh, 11...One roll (filling) of expanded wire mesh, 22...Stretched wire mesh, 23...Stretched wire mesh 22
Section cut, 19...Stretched wire mesh, 20
. . . Folding line of expanded wire mesh 19, 24 . . . Rectangular filling formed by stacking cut sections of expanded wire mesh.

Claims (1)

[Claims] 1. Explosion-suppressing fill for a fuel container, comprising layers of expanded metal placed one on top of the other, each layer parallel to the other with respect to the base of the layer. 1. A filling composed of inclined metal strands, characterized in that the strands in each layer are inclined in the opposite direction to the strands in the adjacent layer. 2. Filling according to claim 1, characterized in that the two interlaced expanded metal layers are wound into a cylindrical scroll. 3. Filling according to claim 1, characterized in that similarly shaped expanded metal pieces are stacked one on top of the other.