JPH0560456U - Conductive flexible hose for vacuum cleaner - Google Patents

Abstract

(57) [Summary] [Purpose] High durability, due to changes in the insertion position of the reinforcing thread and changes in the material by improving the adhesion of the reinforcing thread to the tape.
An object is to provide a high-quality conductive flexible hose for a vacuum cleaner. [Structure] The reinforcing thread 7 is mounted between the lower winding tape 6 and the middle winding tape 12, and the upper winding tape 13 is closely adhered along the middle winding tape 12 and is partially dipped into the fold valley of the hose due to the dimple phenomenon. Does not occur, and the swelling phenomenon of the upper winding tape 13 due to the reinforcing yarn 7 does not occur. Moreover, by improving the material of the reinforcing yarn so that the adhesiveness with the lower winding tape 6 and the middle winding tape 12 is improved, the displacement movement phenomenon of the reinforcing yarn 7 does not occur.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a reinforced conductive flexible hose for an electric vacuum cleaner.

[0002]

[Prior Art]

 Conventional conductive flexible hoses for vacuum cleaners are required to be lightweight, flexible, and easy to use and have high strength and long life. To achieve this, the tape forming the outer wall of the hose is made of a material that is as thin and flexible as possible. However, when used, the vacuum cleaner catches furniture such as desks and chairs, and a sudden force is applied to the hose, so tensile strength is required, and high durability such as repeated bending durability at low temperatures is also required. It is necessary to satisfy the performance. Therefore, reinforcing threads such as nylon threads are used in the tape that forms the outer wall of the hose. In FIGS. 3 and 4, the reinforcing yarn 7 such as the nylon yarn is the middle winding tape 12 of the upper layer portion in the conventional hose having the three-layer tape structure of the lower winding tape 6, the middle winding tape 12 and the upper winding tape 13. It was disposed and inserted between the upper tape 13 and the tape. In addition, a lot of non-adhesive nylon thread is used as the material of the reinforcing thread 7, and soft vinyl chloride resin is mostly used as the tape material. Adhesion between the tapes is made with an organic solvent such as tetrahydrofuran or the like. It was realized by using an adhesive in which a polyurethane resin-based adhesive was added.

Since the material of the reinforcing thread 7 is a nylon thread having low adhesiveness to the tape material as described above, there is almost no adhesion to the upper and lower winding tapes 13 and 12 which form the outer wall of the hose, and in this case, the upper winding tape. By adhering 13 and the middle-winding tape 12, the tape was sandwiched and held and fixed by the adhesive force of the both tapes. Therefore, if the hose is subjected to repeated bending stress, in which a strong tensile tension is applied, the reinforcing yarn 7 is displaced and the reinforcing effect of the hose is deteriorated.

[0004]

[Problems to be solved by the device]

 In such a conventional electrically conductive flexible hose for an electric vacuum cleaner, the reinforcing thread 7 provided for the purpose of reinforcing the hose has a three-layer tape structure of a lower winding tape 6, a middle winding tape 12 and an upper winding tape 13. Since the reinforcing thread 7 is disposed and inserted between the middle winding tape 12 and the upper winding tape 13 of the upper layer portion, the reinforcing yarn 7 has a large unevenness difference between the trough 14 of the hose and the peak 16 (conductive portion 8). Since it is arranged on the upper side, the reinforcing yarn 7 floats up at the troughs 14 of the folds, and the upper winding tape 13 is wound on it, so that the upper winding tape 13 is wound on the troughs 14 of the hose. Cannot be completely adhered along the middle winding tape 12 and is partially adhered (when the hose is pulled, the upper winding tape 13 sinks to the lower side at the adhesion point with the middle winding tape 12 and floats up at the non-adhesion point). Occurs. A dimple-shaped dent (dimple) 15 is generated at this partially bonded portion, that is, the bonded boundary surface. Therefore, when the hose is used, the bending stress is repeatedly concentrated on the dent 15 on the adhesive boundary surface, and the early tear of the upper tape 13 is induced. Also, since the nylon thread is used as the reinforcing thread 7, the adhesiveness between the upper winding tape and the middle winding tape 13 and 12 is poor, so that the reinforcing thread 7 is gradually displaced and the reinforcing effect is deteriorated. .. Another disadvantage of the reinforcing thread 7 being mounted below the upper winding tape 13 is that when the reinforcing thread 7 is mounted, the upper winding tape 13 is covered by the reinforcing thread 7 in the portion of the upper winding tape 13. That is, if the hose is bent in this state, this portion is bent particularly strongly, and the upper tape 13 is easily broken.

The present invention solves the above problems, and an object of the present invention is to provide a high-quality conductive flexible hose for an electric vacuum cleaner having excellent durability.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, a conductive flexible hose for an electric vacuum cleaner according to the present invention has a three-layer tape structure including a lower tape, a middle tape, and an upper tape, and a reinforcing thread for reinforcing the hose is used as a lower layer. The first step is to install it between the lower tape and the middle tape, and the material of the reinforcing thread is a material close to the tape material with good adhesiveness, that is, vinylidene chloride thread or the like is mixed-spun or adhesively activated. This is the second means.

[0007]

[Advantage] In the above structure, the upper tape is evenly adhered to the middle tape and the boundary between the adhesive portion and the non-adhesive portion is eliminated. Therefore, when the hose is used, there is no stress concentration portion in the hose fold valley or the reinforcing thread. Since there is no shift movement of the reinforcing yarn, high durability and high quality can be maintained without deterioration of the reinforcing effect of the reinforcing yarn.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes an electric vacuum cleaner body having an electric blower and a dust collection chamber (neither of which is shown) therein, and a tip suction port 2 thereof has a conductive material for an electric vacuum cleaner of the present invention. The flexible hose 3 is connected. At the tip of the conductive flexible hose, an electric rotary floor suction port 5 having a small electric motor (not shown) for rotating the rotary brush inside is attached via an extension tube 4. There is. The power on / off operation of the vacuum cleaner body 1 and the electric floor suction port can be operated by respective switches (not shown) provided at the proximal portion of the conductive flexible hose.

In FIG. 2, in a conductive flexible hose (hereinafter referred to as a hose) 3, an inner wall surface of the hose is constituted by a lower winding tape 6 made of a synthetic resin such as rubber or soft vinyl chloride, and nylon or a lower winding tape 6 is formed thereon. A material similar to the material of the lower winding tape 6 such as vinylon or vinylidene chloride for improving the adhesiveness with the same, or a mixed yarn thereof, or a reinforcing yarn 7 that has been subjected to adhesive activation treatment is attached. 8 is a reinforcing wire that protects the hose 3 from external pressure and maintains its shape, and also has a conductive part for transmitting the power from the cleaner body 1 to the electric rotary floor suction port 5 attached to the end of the extension tube 4. , A hard steel wire 9 serving as a conductive wire for holding an outer diameter or transmitting an electric signal, and a copper wire 10 serving as a conductive wire, each covered with an insulating material 11 made of synthetic resin. .. The reinforcing wires 8 are wound around the lower winding tape 6 and the reinforcing yarns 7 at intervals of about 10 to 15 mm. A medium winding tape 12 made of rubber made of the same material as that of the lower winding tape 6 or a synthetic resin such as soft vinyl chloride is wound from above the upper winding tape 6 and bonded and fixed to the lower winding tape 6 and the reinforcing wire 8. At this time, the lower winding tape 6 and the reinforcing yarn 7 mounted on the lower winding tape 6 are also bonded and fixed by the middle winding tape 12 and the lower winding tape 6. An upper winding tape 13 made of the same material as the lower winding tape 6 and the middle winding tape 12 is wound on this, and bonded to the middle winding tape 12 to form an outer shell of the hose 3.

In the hose 3 of the present embodiment, the upper winding tape 13 adheres to the middle winding tape 12 without any dimple phenomenon as in the conventional case, and since the upper winding tape 13 does not rise up due to the reinforcing yarn 7. Therefore, it is possible to provide a conductive flexible hose for an electric vacuum cleaner having a very high durability and a high quality.

[0012]

[Effect of the device]

 As is apparent from the above description of the embodiments, according to the conductive flexible hose for the electric vacuum cleaner of the present invention, the reinforcing thread is inserted between the lower winding tape and the middle winding tape, and the material of the reinforcing thread is lower wound. By improving the adhesiveness to tapes and medium winding tapes, it has become possible to provide high-quality conductive flexible hoses for vacuum cleaners with high durability.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the structure of a conductive flexible hose for an electric vacuum cleaner according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which a conductive flexible hose for an electric vacuum cleaner is attached to the electric vacuum cleaner.

FIG. 3 is a cross-sectional view showing the configuration of a conventional conductive flexible hose for an electric vacuum cleaner.

FIG. 4 is a front view showing a cross section with a part cut away.

[Explanation of symbols]

 3 Hose 6 Lower winding tape 7 Reinforcing yarn 8 Reinforcing wire 12 Middle winding tape 13 Upper winding tape

Claims (2)

[Scope of utility model registration request] 1. A hose having a multi-layer tape structure of three or more layers, such as a lower-winding tape, a middle-winding tape, and an upper-winding tape, wherein a reinforcing thread is attached to a lowermost layer portion between the lower-winding tape and the middle-winding tape. Conductive flexible hose for vacuum cleaner. 2. The conductive flexible hose for an electric vacuum cleaner according to claim 1, wherein the tape material is rubber or soft vinyl chloride, and the reinforcing thread is vinylon or vinylidene chloride having a property of being highly adhesive to the tape material.