JP3685529B2 - Hose for vacuum cleaner and its manufacturing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flexible hose that fits into a hose joint, a vacuum cleaner hose with an improved airtight structure at its end, and a method for manufacturing the same.
[0002]
[Prior art]
As shown in FIG. 7, generally, a vacuum cleaner is configured by connecting a hose 2 and an extension pipe 3 to a main body 1 and further appropriately attaching a cleaning article 4 such as a floor brush to a tip portion. Further, the hose 2 for the vacuum cleaner is connected to the main body side hose joint portion 7 which is detachably fitted to the air inlet 6 of the main body 1 and the extension pipe 3 at both ends of the flexible hose 5. The hand side hose joint portions 8 are connected to each other.
[0003]
Conventionally, as shown in FIG. 8, the flexible hose 5 is spirally wound together with a conductive wire 9 and a steel wire 10 which are covered with insulation, and a soft material 11 such as vinyl chloride is formed thereon. It was configured by coating with. Further, as shown in FIG. 9, the hose joint to which the flexible hose 5 is fitted and fixed, for example, the hose joint portion 7 on the main body side, is appropriately positioned on the outer periphery of the fitting surface so that the flexible hose 5 does not fall off. In this configuration, the protrusion 12 is simply formed. Then, as shown in FIG. 10, an adhesive is applied to the outer peripheral surface of the hose connection side pipe end of the main body side hose joint 7 to fit and fix the flexible hose 5, and the ribs 13 and 14 are used. The cover 15 is attached, and an operation button 17 having a locking claw 16 for engaging and releasing the main body side hose joint portion 7 fitted to the intake port 6 of the main body 1 is attached to the attachment portion 19 and the end of the hose 2 is attached. Consisted of parts.
[0004]
[Problems to be solved by the invention]
Thus, conventionally, the conductive wire 9 and the steel wire 10 are spirally wound together, and the flexible hose 5 covered with the soft material 11 such as vinyl chloride is used for the vacuum cleaner. Since the hose 2 is configured, the flexible hose 5 can be easily fitted and fixed to the hose joint portion 7 on the main body side, but it is difficult to restore the flexible hose 5 to its original state once deformed. As a result, the outer tube becomes unsightly, and the suction force is reduced and dust is easily clogged.
[0005]
In order to improve such a point, the flexible hose 5 is formed of a polyethylene tube in which conductive wires and concave and convex grooves are spirally formed, and the hose 2 for a vacuum cleaner is constructed without using a steel wire. Is also known.
[0006]
However, in the case of the flexible hose 5 having such a concavo-convex groove, the adhesion area when attached to the pipe end portion of the main body side hose joint portion 7 is reduced, and it is easy to come out, and the external part is provided via the concavo-convex groove. Even if air penetrates into the pipe and the suction force of the main body 1 is increased, there is no effect, and there has been a problem that it has not been possible to meet the recent demand for higher power of vacuum cleaners.
[0007]
An object of the present invention is to solve the above-mentioned problems and to provide a hose for a vacuum cleaner that improves the sealing performance of a connecting portion between a flexible hose and a hose joint, and a method for manufacturing the same.
[0008]
[Means for Solving the Problems]
The invention according to claim 1 is an electric vacuum cleaner hose in which a hose joint portion is fitted and connected to an end portion of a flexible hose in which a spiral concave and convex portion is formed. parts are formed closed section for blocking an air passage leading into the tube is collapsed it said concave-convex portions to melt, and wherein the formed isosamples is fitted and connected to the hose joint.
[0009]
According to a second aspect of the present invention, in the hose for an electric vacuum cleaner in which a hose joint portion is fitted and connected to an end portion of the flexible hose in which the concave and convex portions are formed , the flexible hose uses a resin material. wherein with the concave-convex portions are formed in a spiral shape, closed portion of its ends to block the air passages leading to pipe said concave-convex portions are crushed by melting by heat treatment is formed, said closing portion is the Te the hose joint flange-like rib formed on a surface in contact is fitted and connected, characterized in adult Rukoto.
[0010]
According to a third aspect of the present invention, there is provided a method for manufacturing a hose for a vacuum cleaner in which a hose joint portion is fitted and connected to an end portion of a flexible hose in which an uneven ridge portion is formed. A tube having a predetermined length in which a band having a concavo-convex portion is formed by extrusion molding, and the side portions of the band are spirally wound while being bonded to each other, and the concavo-convex portion is formed in a spiral shape And forming a closed portion that blocks the air passage connected to the inside of the pipe by crushing the ends of the pipe by heat welding, and is fitted and fixed to the hose joint.
[0011]
According to a fourth aspect of the present invention, there is provided a method for manufacturing a hose for a vacuum cleaner in which a hose joint portion is fitted and connected to an end portion of a flexible hose in which an uneven ridge portion is formed. A tube having a predetermined length in which a band having a concavo-convex portion is formed by extrusion molding, and the side portions of the band are spirally wound while being bonded to each other, and the concavo-convex portion is formed in a spiral shape The tube end is thermally welded by fitting the end of the tube with an electric heating body having a flange portion larger than the diameter of the tube and fitting to the tube end, The hose is formed by crushing the ridges at the end of the tube to form a closed portion that blocks the air passage connected to the inside of the tube , and then contacting the closed portion with a flange-like rib formed on the surface of the hose joint portion. It is characterized by being fitted and fixed to the joint part.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows an example of an embodiment of the present invention. A flexible hose 31 constituting a hose for a vacuum cleaner is a concave and convex portion having a conductive wire 32 and an inner surface formed in a groove 33 on a polyethylene resin tube. Are formed in a spiral shape, and the flexible hose 31 is manufactured as follows.
[0013]
That is, first, a band 34 having a structure in which two conductive wires 32 reciprocating between a vacuum cleaner main body and a hand operation switch are embedded and a groove 33 is formed by extrusion molding using polyethylene resin. To do.
[0014]
Next, the side portions of the band 34 are spirally wound while being bonded to each other using an adhesive or the like to form a tube in which the conductive wires 32 and the grooves 33 are formed in a spiral shape. By joining the side portions of the band 34, a narrow groove is formed on the inner surface of the joint 35. Further, on the surface of the tube, as shown in FIG. 1, a protrusion 35 ′ corresponding to the joint 35, a protrusion 32 ′ corresponding to the embedded portion of the two reciprocating conductive wires 32, and a groove 33 on the inner surface. A slightly wider ridge 33 'corresponding to the portion is formed. The hose tube thus formed is cut to a desired length, and the hose tube end surface 36 at the cut end is heated and melted by the electric heater 41.
[0015]
The electric heater 41 includes a flange portion 43 at the end of the fitting portion 42 that fits inside the hose pipe, and a heater wire connected to an external commercial power supply 44 is disposed inside the flange portion 43. The surface of the metal that comes into contact with the hose pipe is subjected to fluorine processing.
[0016]
The hose tube cut into a predetermined length is inserted into the fitting portion 42 of the electric heater 41 until the end surface 36 contacts the flange portion 43. As shown in FIG. 2A, the hose pipe end surface 36 is formed with a closed portion 38 so as to block an air passage that is melted by heat and the ridges are crushed and connected to the inside of the pipe. In this case, a heater is also incorporated in the fitting portion 42 portion of the electric heater 41, and not only the end surface of the hose tube but also the portion that has entered the inner surface of the tube somewhat from the end surface of the hose is heat-melted to crush the uneven strip and finish it flat. In such a case, the joining area with the hose joint joining surface described later increases, and a stronger joining can be obtained.
[0017]
At this time, as shown in FIG. 2 (B), the two conductive wires 32a and 32b are preferably pulled out in advance from the front side of the hose tube end face by breaking the resin sheath of the embedded portion. The flexible hose 31 portion of the vacuum cleaner hose is configured in this manner.
[0018]
On the other hand, as shown in the top view of FIG. 3A, the side view of FIG. 3B, and the enlarged view of the Z part of FIG. 3C, the hose joint part, for example, the main body side hose joint part 51 is fitted with the flexible hose 31. On the mating surface, a ridge 52 having the same inclination as the groove 33 formed on the inner surface of the hose pipe is formed. The ridges 52 are discretely formed so that the flexible hose 31 can be easily screwed, and the end 52a has a taper rising from the tube surface.
[0019]
Further, a flange-like rib 53 with which the end surface abuts is formed on the fitting surface of the main body side hose joint portion 51, and a concave portion 54 serving as an adhesive pool to be described later is formed at the root of the rib 53 on the hose connection side. Has been. The rest of the configuration such as the operation button mounting portion 55 is the same as the conventional one.
[0020]
An adhesive is applied to the hose connection side pipe outer peripheral surface of the main body side hose joint part 51 having such a configuration, and the flexible hose 31 is pushed in while rotating. As a result, the ridge 52 is fitted into the groove 33 formed on the inner surface, and thereafter, the flexible hose 31 is rotated to be sequentially fitted in the rib 53 direction. As shown in the top view of FIG. 5, the flexible hose 31 and the rib 53 are fitted and connected in a state where the closing portion 38 formed on the hose tube surface is in contact with the rib 53.
[0021]
At this time, the adhesive applied to the tube surface is pushed into the rib 53 side with the insertion of the flexible hose 31. If the concave portion 54 is not formed at the root of the rib 53, when the end surface of the flexible hose 31 comes into contact with the rib 53, the excess portion of the adhesive overflows on the surface of the joint and reaches the operator's hand. Although the operation is hindered, the formation of the concave portion 54 absorbs the excess adhesive into the concave portion 54 without overflowing the surface, and the excess adhesive accumulated in the concave portion 54 passes around the portion where the adhesive is insufficient. Filled.
[0022]
As described above, the protruding portion 52 of the hose joint 51 on the main body side is fitted into the groove 33 of the flexible hose 31, and the closing portion 38 on the end surface of the hose pipe is joined to the rib 53 and firmly fitted. Fixed. Thereafter, the two conductive wires 32a and 32b and the lead wires connected to the electrical connection pins 58a and 58b formed on the main body side hose joint portion 51 are connected, and the rib 53 and the operation button mounting portion 55 are connected. Store in the gap. A partition rib 59 is formed in the gap so that the two conductive wire connecting portions do not contact each other. Further, a hose cover 61 is mounted on the joint surface between the flexible hose 31 and the main body side hose joint portion 51, while the operation button mounting portion 55 is engaged with an intake port formed in the main body. When the operation button 57 having the locking claw 56 for releasing is attached, the joining with the main body side hose joint portion 51 is completed. Moreover, joining of the flexible hose 31 and the hand side hose joint part is performed in the same manner as described above to obtain a hose for a vacuum cleaner.
[0023]
By the way, in response to the recent power-up of the vacuum cleaner main body, in order to make the seal of the joint of the flexible hose 31 and the main body side hose joint 51 more complete, Before fitting into the side hose joint 51, a sponge-like soft elastic member 71 is wound around the hose connection side at the base of the rib 53. Alternatively, an elastic member 71 formed by cutting a urethane sheet having a thickness of 1 to 2 cm into a donut shape according to the shape of the rib 53 may be bonded to the hose connection side surface of the rib 53. The flexible hose 31 is inserted into the distal end portion of the main body side hose joint portion 51 to which the elastic member 71 is adhered in the same manner as described above, and the closed portion 38 on the end surface of the hose tube is strongly pressed against the rib 53 side. As a result, as shown in FIG. 6, the elastic member 71 is inserted between the closed portion 38 and the rib 53 in a crushed state, and thereby air circulation through the continuous grooves 33 and 35 is further improved. A vacuum cleaner hose that is completely shut off and has a very good sealing performance is obtained.
[0024]
【The invention's effect】
According to the first aspect of the present invention, the end of the flexible hose in which the spiral concavo-convex ridge portion is formed melts and the concavo-convex ridge portion is crushed to form a blocking portion that blocks the air passage connected to the inside of the pipe. By fitting and connecting to the hose joint part , a vacuum cleaner hose with good airtightness can be obtained.
[0025]
According to the invention of claim 2, the flexible hose is made of a resin material, and the conductive wire burying portion and the concavo-convex portion are formed in a spiral shape. At the same time, the end of the flexible hose is melted to form a closed portion that blocks the air passage connected to the inside of the tube by crushing the uneven strip , and the closed portion is formed on the surface of the hose joint portion. By contacting the ribs, a vacuum cleaner hose with extremely good airtightness can be obtained.
[0026]
According to the invention according to claim 3, a flexible resin material is continuously formed by extrusion molding to form a band on which concave and convex portions are formed, and the sides of the band are spirally bonded to each other. Since the tube is formed by winding to form a spiral strip, the hose for an electric vacuum cleaner can be manufactured very efficiently and continuously. Further, with the obtained hose is a hose with resilient which is not deformed even trampled and closed portion is formed so as hose end blocks the air passage leading to the tube collapse is concave-convex portions by thermal welding flat Thus, a vacuum cleaner hose with extremely good airtightness can be manufactured by fitting and connecting the closed portion to the hose joint portion.
[0027]
According to the invention according to claim 4, a flexible resin material is continuously formed by extrusion molding to form a band on which concave and convex portions are formed, and the sides of the band are spirally bonded to each other. Since the tube is formed by winding to form a spiral strip, the hose for an electric vacuum cleaner can be manufactured very efficiently and continuously. As a result, a recoverable hose that does not deform even if it is stepped on is obtained, and the end of the hose is simply heat-melted by fitting it into an electric heater having a flange, and the ridges are crushed into the pipe. A closed portion in which the connected air passage is blocked is formed at the end of the hose, and the closed portion is brought into contact with a flange-shaped rib formed on the surface of the hose joint portion, and is fitted and joined to the hose joint. A vacuum cleaner hose with extremely good airtightness can be manufactured.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram for explaining a structure of a flexible hose part of a hose for a vacuum cleaner according to the present invention and a manufacturing method thereof.
FIG. 2 is an explanatory view of a flexible hose portion of a hose for a vacuum cleaner according to the present invention.
FIG. 3 is an explanatory view of a hose joint portion on the main body side of the hose for a vacuum cleaner according to the present invention, (A) is a top view thereof, (B) is a side view thereof, and (C) is an enlarged Z portion of (A). Figure.
FIG. 4 is a cross-sectional view showing a joint portion between a flexible hose portion and a main body side hose joint portion of a vacuum cleaner hose according to the present invention.
FIG. 5 is a plan view showing a joint portion between a flexible hose portion and a main body side hose joint portion of a vacuum cleaner hose according to the present invention.
FIG. 6 is a partial cross-sectional view showing another configuration example of the joint portion between the flexible hose portion and the main body side hose joint portion of the hose for a vacuum cleaner according to the present invention.
FIG. 7 is an external view for explaining a configuration of a general electric vacuum cleaner.
FIG. 8 is a partially broken explanatory view of a flexible hose portion of a conventional vacuum cleaner hose.
FIG. 9 is a side view of a main body side hose joint part of a conventional vacuum cleaner hose.
FIG. 10 is a cross-sectional view showing a joint portion between a flexible hose portion of a conventional vacuum cleaner hose and a main body side hose joint portion.
[Explanation of symbols]
31 Flexible hose 32 Conductive wire 33 Groove 34 Band 35 Joint part 38 Closure part 41 Electric heater 51 Main body side hose joint part
53 Flange-shaped rib

Claims (4)

In the hose for a vacuum cleaner, in which the hose joint portion is fitted and connected to the end portion of the flexible hose in which the spiral concave and convex portion is formed ,
It said closing portion which the end of the flexible hose to block the air passages leading to canal collapse said concave-convex portions melt is formed, characterized by fitting the connected formed Rukoto the hose joint portion Hose for electric vacuum cleaner. In the hose for a vacuum cleaner, in which the hose joint portion is fitted and connected to the end portion of the flexible hose in which the concave and convex portions are formed ,
The flexible hose is formed by using a resin material so that the concavo-convex portion is formed in a spiral shape, and an end portion of the flexible hose is melted by heat treatment so that the concavo-convex portion is crushed and blocks an air passage connected to the pipe There is formed, a hose for an electric vacuum cleaner in which the occlusion is characterized abuts adult is fitted and connected to Rukoto to the hose joint flange-like rib formed on the surface. In a method of manufacturing a hose for a vacuum cleaner, in which a hose joint portion is fitted and connected to an end portion of a flexible hose in which an uneven strip portion is formed ,
Using a flexible resin material, a continuous band is formed by extruding, and the bands are spirally wound while adhering the sides of the band to form a spiral. A tube having a predetermined length is formed, and an end portion of the tube is thermally welded to crush the concavo-convex portion to form a closed portion blocking an air passage connected to the inside of the tube, and is fitted and fixed to the hose joint portion. The manufacturing method of the hose for vacuum cleaners characterized by the above-mentioned. In a method of manufacturing a hose for a vacuum cleaner, in which a hose joint portion is fitted and connected to an end portion of a flexible hose in which an uneven strip portion is formed ,
Using a flexible resin material, a continuous band is formed by extruding, and the bands are spirally wound while adhering the sides of the band to form a spiral. The pipe end portion is formed by forming a pipe having a predetermined length and fitting an end portion of the pipe to an electric heating body having a flange portion larger than the diameter of the pipe and fitting to the pipe end portion. The clogged ridges at the end of the tube are crushed to form a closed portion that blocks the air passage connected to the inside of the tube , and then the closed portion is contacted with a flange-shaped rib formed on the surface of the hose joint portion. A method for manufacturing a hose for a vacuum cleaner , wherein the hose joint is fitted and fixed to the hose joint.

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