JPH0369035B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a hose having a structure capable of self-maintaining both an extended position and a contracted position, such as an air intake hose for a vacuum cleaner. This invention relates to a hose having a structure that can be used in a contracted position for convenient storage and in an extended position for convenient use. Of course, the hose referred to in the present invention is not limited to a cleaner hose, but can also be used as a drain hose for an electric washing machine, a hose for a hair dryer,
It is used as a hose for futon dryers and as a retractable hose for various other devices.

<Prior art> As for the hose that can maintain its own posture in both the extended posture and the contracted posture, which is the object of the present invention, there is a device as disclosed in, for example, Japanese Utility Model Publication No. 43-24675. do. As shown in FIG. 10, the hose of this invention has a pipe wall 01 formed in an annular uneven wave shape, and its cross section is triangular, and one inclined wall 03 is connected to the other inclined wall 04 with the apex 02 as the center. transform into a reduced posture approximately parallel to the
It is designed to be able to maintain its reduced posture by itself. Furthermore, there is also a device as seen in, for example, Japanese Utility Model Publication No. 49-41539. As shown in FIG. 11, the hose of this invention has a tube wall 0 having an annular uneven wall structure similar to that of the hose 1H shown in FIG. 11.
Straight tubes 06 separately formed on the inner circumferential surface of the troughs 05 of 1 are integrally connected to form a double-walled hose 2H, and each ridge 07 or a portion of the tube 06 corresponding to each ridge 07 is formed. It has a structure in which ventilation holes 08 are formed.

<Problems to be Solved by the Invention> The former hose 1H having the structure shown in FIG. It is used for hoses such as dryer hoses.

However, in the relative motion between a fluid and a solid,
The fluid adheres to the solid surface and creates a velocity gradient,
It is generally known that shear stress is caused by viscosity, and fluid friction, unlike friction between solids, is not related to pressure and is proportional to the contact area, so if the inner surface of such a hose is continuous. In the case of a hose having an uneven shape, a large amount of fluid friction occurs, resulting in a large loss in fluid pumping force or fluid suction force.

Therefore, as a means to solve this drawback, the present inventor devised a double-walled hose 2H having the structure shown in the latter FIG. It was necessary to form a ventilation hole 08 in the part of the tube 06 that corresponds to the tube 06, so it required a lot of effort to form the ventilation hole 08, and it was difficult to put it on a commercial basis. It has been found that this method has the disadvantage that it is difficult to increase the relative ratio between the posture and the reduced posture, and furthermore, it is difficult to reliably maintain the reduced posture by itself.

Therefore, as a result of various researches, the present inventors hereby propose an expandable hose that can solve all of the drawbacks of both hoses 1H and 2H.

<Means for Solving the Problems> The structure of the hose of the present invention will be explained with reference to FIGS. 1 to 3 showing examples. The outer peripheral wall 1 is formed in an uneven wave shape, and the cross-sectional shape is in a telescopic position. has a substantially triangular shape, and the top portion 2 of the triangular shape
The hose has a structure in which one inclined wall 3 can easily change to a contracted position in which it is substantially parallel to the other inclined wall 4, centering on a portion near the outer circumferential wall 1, and the uneven waveform of the outer peripheral wall 1 is It is formed in a spiral wave shape, and the inner wall material 6 is a flat band made of synthetic resin material, and is wound in a gently inclined spiral shape with one end side 7 having a small diameter, and one end side 7 is a free end and the other end side is wound in a gently inclined spiral shape. 8 is connected to the top of the inner peripheral surface of the trough 5 of the outer peripheral wall 1 or near the top, and the connected end side 8 of the inner wall material 6 and the free end side 7 formed to have a small diameter are connected to each other in the extended posture. This is a retractable spiral hose having a structure with a small gap 9 between 7 and 8.

<Function> As shown in FIG. 6, when a hose with such a structure is used as a cleaner hose H for a vacuum cleaner C, for example, the free end 7 of the inner wall material 6 is connected to the vacuum cleaner. It is positioned toward the intake port side of C, and is used in an extended position as shown in FIG. 1, and when not in use, it is stored in a contracted position as shown in FIG.

<Example> Next, embodiments will be described based on the drawings.

First, the hose H shown in FIGS. 1 to 3 is shown disassembled in FIG. is wound in a gently inclined spiral shape so that the diameter is smaller on the left side in the figure, and the connected end edge 8 is located on the front side in the winding direction (left side in Figure 4).
A strip material for forming the outer peripheral wall 1 having a triangular chevron cross-sectional shape, with the right inclined wall 3 being slightly shorter than the left inclined wall 4, is wound spirally on the outer peripheral surface side of the left inclined wall. 4
The end portion 41 of the outer circumferential wall 1 is fused or adhered to the upper surface of the continuous end side 8, and at the same time, the end portion of the left inclined wall 4 of the outer peripheral wall 1 band material is wrapped around the end portion 31 of the right inclined wall 3 first. It is fused or adhered to the upper surface of 41.

In this way, the strip for the inner wall material 6 and the strip for the outer peripheral wall 1 are sequentially spirally formed at the same pitch while forming the strip for the inner wall material 6 so as to overlap partially as shown in FIG. The hose is wound into a shape to form a long hose, and cut to a predetermined length. In this way, only the right end side 8 in the figure is connected to the inner peripheral surface of the valley portion 5 of the outer peripheral wall 1, and the left end side 7 is a free end, and the free end is extended by a predetermined thickness. The hose H is structured to have a cavity 9 between the outer circumferential surface of the side 7 and the inner circumferential surface of the continuous end side 8 of the next-wound inner wall material 6.

The hose H shown in FIGS. 1 to 3 formed in this way is formed in an extended position as shown in FIG. 2 when the hose is formed, so that it can easily maintain itself in this extended position. When an external force is applied in the axial direction, the short right inclined wall 3 moves into the long left inclined wall 4 and takes a posture along the long inclined wall 4, as shown in FIG. At the same time, the band-shaped inner wall materials 6 also take a superimposed posture and are in a posture in which they are in substantially close contact with each other, so that together with the self-holding of the contracted posture of the outer peripheral wall 1 itself, or the self-holding force of the contracted posture of the outer peripheral wall 1 itself is not perfect. Even in the case of
This makes it possible to obtain a hose H that can easily maintain its contracted position.

As a means for facilitating the transition of the outer circumferential wall 1 itself to the contracted position, when the outer circumferential wall material is made thin as shown in FIGS. 1 to 4,
This can also be done by making one of the triangular inclined walls 3, 4 shorter than the other, but for example, as shown in FIG. This can also be done by forming extremely thin parts in the peripheral part 22 and the parts 32, 42 near the tips of both the left and right inclined walls 3, 4. If there is a concern that an extremely thin wall portion will reduce the strength due to wear, the extremely thin wall portion may be formed at a portion 22' that moves from the top portion 2 to the slightly shorter inclined wall 3 side, as shown in the same figure. However, there is no intention to specifically limit these structures.

The embodiments shown in FIGS. 7 and 8 are shown in FIGS.
Each of the embodiments shown in FIG. 4 is different from the embodiment shown in FIG.
In the embodiment shown in the figure, the right inclined side 3 is shorter than the left inclined side 4, as in the embodiment shown in FIG.
In addition, an inner wall material 6 is integrally formed in a continuous manner to the left of the lower end of the long left inclined side 4, and the thickness of the inner wall material 6 portion is greater than the thickness of the band material portion forming the outer peripheral wall 1. It has a thinner thickness. In addition, in the embodiment shown in FIG. 8, the right inclined side 4 is longer than the left inclined side 3, and the inner wall material 6 is integrally connected to the left of the lower end of the left inclined side 3 of various short lengths. It was formed.

In these cases, the lower end 31 of the right inclined side,
41 only to the outer peripheral surface of the proximal end 81 of the inner wall material 6, a hose having a gap 9 between the inner wall materials 6 and 6, similar to the hose H shown in FIG. Obtainable.

The lower ends 31 and 41 of these right inclined sides do not necessarily have to be fused or bonded on the base end 81 of the inner wall material 6, but as shown in FIG. It goes without saying that a structure in which it is fused or adhered to the inclined portion may also be used.

Although the embodiments considered to be representative of the present invention have been described above, the present invention is not limited only to those described in these embodiments, and the present invention is not limited to only those described in these embodiments, and has the constituent elements defined in the present invention and achieves the objectives defined in the present invention. It can be implemented with appropriate modification within the scope of achieving the following effects.

Although there is no particular intention to limit the material for forming the hose, it goes without saying that a flexible material that can be bent at each bending portion is selected and used when changing the position of expansion and contraction.

In addition, it is not necessarily necessary that both ends 7 and 8 of the adjacent inner wall materials 6 are in a partially overlapping posture in the tube axis direction, but in a posture in which they are located at approximately the same position in the tube axis direction or in a tube axis direction. It may also be formed in a position that is slightly apart from each other. In addition, the outer peripheral wall 1 and the inner wall material 6
The wall thickness of the inner wall material 6 is thin (Fig. 2,
It will be easily understood that the outer circumferential wall 1 is not limited to the one shown in FIG.

<Effects of the Invention> The present invention is not an expandable hose formed only of a simple outer peripheral wall, but has a hose structure having an inner wall material, so that the side of the inner wall material connected to the outer peripheral wall is used as the fluid flow source side. By using it, it has the advantage that it can be used as a hose with extremely low fluid resistance, which is almost the same as a double pipe with a cylindrical inner wall.For example, it can be used as a cleaner hose for a vacuum cleaner or a suction hose for a drainage pump. It can be used extremely effectively when used as a hose for equipment such as a suction work hose, where the unevenness of the inner peripheral wall significantly affects the suction force. Since the structure has a small gap between the end side and the proximal side of the next inner wall material, the reduced posture in the axial direction can be easily changed with extremely little resistance, and the It is possible to reduce the posture, such as the cleaner hose for vacuum cleaners, the suction hose for drain pumps, and the drain hose for electric washing machines.
It is most suitable as a hose that requires a contracted position as much as possible when the equipment is not in use.Moreover, it is easy to create a structure in which the inner wall materials are in close contact with each other when maintaining the contracted position. Even if the outer peripheral wall itself has a structure that lacks the ability to self-maintain the reduced posture, we can expect a remarkable effect in that the reduced posture can be easily maintained by the frictional resistance between the inner wall materials. It can be done.

Although it has such an effect, the inner wall material is made of a flat band made of synthetic resin material and is wound in a gently inclined spiral shape with one end having a small diameter. Therefore, it is easy to manufacture the inner wall material itself, and it is extremely easy to wind it. Therefore, it is easy to manufacture the entire hose, and a homogeneous hose can be obtained. We can now expect the same.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing the hose of the present invention, FIG. 2 is an enlarged cross-sectional view of the main parts showing the hose in an extended position,
Figure 3 is an enlarged cross-sectional view of the main parts showing the reduced position, Figure 4
The figure is an exploded sectional view, FIG. 5 is a sectional view showing the structure of the band material for the outer circumferential wall, FIG. 6 is an external view of a vacuum cleaner illustrating how the hose of the present invention is used, and FIGS. 7 to 9 The figures are cross-sectional views of main parts showing different embodiments,
FIG. 10 and FIG. 11 are a longitudinal sectional front view and a partially cutaway front view showing a hose with a conventional structure, respectively. In the figure, 1 is the outer peripheral wall, 2 is the top, 3 and 4 are inclined walls, 5 is the valley, 6 is the inner wall material, 7 is the free end side, 8 is the continuous end side, 9 is the gap, and 10 is the inside of the triangle Space, H indicates a hose.

Claims (1)

[Scope of Claims] 1. The outer circumferential wall 1 is formed in a concave-convex wave shape, and its cross-sectional shape is approximately triangular in the extended position, and one side slopes at or near the top 2 of the triangular shape. The hose has a structure in which the wall 3 can easily change to a contracted position in which it is substantially parallel to the other inclined wall 4, and the uneven waveform of the outer peripheral wall 1 is formed in a spiral wave shape, and the inner wall material 6 is It is a flat band made of synthetic resin material, and is wound in a gently inclined spiral shape with one end 7 having a small diameter, one end 7 being a free end, and the other end 8 being the inner periphery of the valley 5 of the outer peripheral wall 1. The continuous end side 8 of the inner wall material 6 and the free end side 7 formed with a small diameter are connected to the top of the surface or a part near the top, so that a small space 9 is formed between the two ends 7 and 8 in the extended position. A retractable spiral hose with a structure of 2. The extendable spiral hose according to claim 1, wherein the length of one inclined wall 3 is shorter than the length of the other inclined wall 4. 3 The bent portions of the inclined walls 3 and 4 are extremely thin wall portions 22 and 3
2. The retractable helical hose according to claim 1, which is formed in a length of 2,42. 4. The extendable spiral hose according to claim 1, wherein the outer circumferential wall 1 and the inner wall material 6 are formed to have substantially the same thickness. 5. The expandable spiral hose according to claim 1, wherein the inner wall material 6 is thinner than the outer peripheral wall 1. 6. The expandable spiral hose according to claim 1, wherein the outer peripheral wall 1 and the inner wall material 6 are connected by fusion or adhesion. 7. The expandable spiral hose according to claim 1, wherein the outer circumferential wall 1 and the inner wall material 6 are formed by continuous continuous band material. 8. The extendable spiral hose according to claim 1, wherein the space 9 between both end sides 7 and 8 of the inner wall material 6 in the extended position is a space large enough to provide a close contact position in the contracted position. 9. The expandable spiral hose according to claim 1, wherein the inner wall material 6 is connected to the inclined wall on the long side. 10. The expandable spiral hose according to claim 1, wherein the inner wall material 6 is connected to the inclined wall on the short side. 11 In the stretched position, both end sides 7 and 8 of the inner wall materials 6 adjacent to each other in the tube axis direction partially overlap h in the tube axis direction.
The retractable helical hose according to claim 1, which is formed in a posture that allows the hose to be retracted. 12. The retractable spiral hose according to claim 1, which is formed in a posture in which both ends 7 and 8 of the adjacent inner wall members 6 are located at substantially the same position in the tube axis direction in the stretched posture.