JP6887072B2 - Extension pipe and vacuum cleaner using it - Google Patents

Description

The present invention relates to an extension pipe used for an electric vacuum cleaner and the like, and an electric vacuum cleaner.

Conventionally, as an extension pipe of this type, a cylindrical portion forming a ventilation path is made of a metal material such as an aluminum material, and a hose connected to a vacuum cleaner and a connecting portion with a mouthpiece are arranged as separate members. A configuration has been proposed (see, for example, Patent Document 1).

FIG. 9 is a side view of the conventional extension tube described in Patent Document 1. In FIG. 9, the conventional extension pipe 202 is a suction tool connected to a cylindrical portion 204 made of an aluminum material and forming a ventilation path (not shown) and a suction tool 201 whose one end sucks dust on the surface to be cleaned. It is composed of a connection part 205 and a hose connection part 206 connected to a hose 203 communicating with an electric blower (not shown) built in a vacuum cleaner body (not shown) of an electric vacuum cleaner (not shown). Each of the suction tool connecting portion 205 and the hose connecting portion 206 is fitted and fixed to the fitting portion 207 formed in the cylindrical portion 204.

Japanese Unexamined Patent Publication No. 6-54784

However, in the above-mentioned conventional extension pipe, there is still room for improvement from the viewpoint of improving the usability of the vacuum cleaner.

That is, in the conventional extension pipe, the cylindrical portion 204 forming the air passage is made of an aluminum material having a larger specific gravity than that of a general resin, and the mass has increased. Further, since it is necessary to fit the cylindrical portion 204 forming the ventilation path and the suction tool 201 or the hose 203 via the suction tool connection portion 205 or the hose connection portion 206, the structure for forming the fitting portion becomes complicated. There was a problem that the size and mass of the hose increased.

Further, since parts made of different materials are fitted, when an external force is applied to the extension pipe 202, the cylindrical portion 204 forming the ventilation path and the connecting portion that can connect the suction tool 201 or the hose 203 are disengaged, and air is removed. Leaked out, and there was a problem that the cylindrical portion 204 and the connecting portion were separated.

The present invention has been made in view of the problems of the higher-level prior art, and an object of the present invention is to provide a lightweight, compact and highly safe extension pipe and an easy-to-use vacuum cleaner.

In order to solve the above-mentioned conventional problems, the extension tube of the present invention includes a fiber-reinforced resin laminated sheet made of a polyolefin resin and a resin supporting member made of a resin having a high affinity with the fiber-reinforced resin laminated sheet. The fiber-reinforced resin laminated sheet and the resin support member are configured to have a substantially cylindrical shape, and the resin support member is fused to the fiber-reinforced resin laminated sheet by an integral molding method including insert molding. It is equipped with a connecting part at the end of the support member to which a suction tool that sucks dust can be connected, and is compatible with fiber-reinforced resin laminated sheets and fiber-reinforced resin laminated sheets made of polyolefin-based resin, which has a relatively small specific gravity among resins. Since the cylindrical portion forming the air passage can be formed of a high resin, the weight can be reduced while ensuring the physical strength against bending. Further, since the cylindrical portion forming the ventilation path and the connecting portion to which the suction tool for sucking dust is connected are integrally molded, the structure is simplified and the weight can be reduced without increasing the size. Further, since the cylindrical portion and the connecting portion are not separated, it is possible to provide a highly safe extension tube.

Further, the vacuum cleaner of the present invention has the extension pipe according to any one of claims 1 to 7, and is easy to use by using a lightweight, compact and highly safe extension pipe. A vacuum cleaner can be provided.

According to the extension pipe of the present invention, a cylindrical portion forming a ventilation path can be formed of a fiber-reinforced resin laminated sheet made of a polyolefin-based resin having a relatively small specific gravity among the resins and a resin having a high affinity with the fiber-reinforced resin laminated sheet. Therefore, the weight can be reduced while ensuring the physical strength against bending. Further, since the cylindrical portion forming the ventilation path and the connecting portion to which the suction tool for sucking dust is connected are integrally molded, the structure is simplified and the weight can be reduced without increasing the size. Further, since the cylindrical portion and the connecting portion are not separated, it is possible to provide a highly safe extension tube. Further, by using this extension pipe for a vacuum cleaner, it is possible to provide a vacuum cleaner that is easy to use.

Right side view of the vacuum cleaner using the extension pipe according to the first embodiment of the present invention. Perspective view of the extension pipe Right side view of the extension pipe Cross-sectional view from the right side of the central axis of the substantially cylindrical shape of the extension pipe Exploded view of the extension pipe Exploded view of integrally molded parts of the extension pipe Cross-sectional view in the central part of the extension pipe in the direction perpendicular to the central axis Sectional drawing which shows the laminated structure of the fiber reinforced resin laminated sheet of the extension tube Side view of conventional extension pipe

The first invention includes a fiber-reinforced resin laminated sheet made of a polyolefin resin and a resin support member made of a resin having a high affinity with the fiber-reinforced resin laminated sheet, and the fiber-reinforced resin laminated sheet and the resin support member. The resin support member is fused to the fiber-reinforced resin laminated sheet by an integral molding method including insert molding, and sucks dust into the end portion of the resin support member. A cylindrical part that is equipped with a connection part to which tools can be connected, and forms a ventilation path with a fiber-reinforced resin laminated sheet made of a polyolefin resin having a relatively small specific gravity and a resin having a high affinity with the fiber-reinforced resin laminated sheet. Therefore, it is possible to reduce the weight while ensuring the physical strength against bending. Further, since the cylindrical portion forming the ventilation path and the connecting portion to which the suction tool for sucking dust is connected are integrally molded, the structure is simplified and the weight can be reduced without increasing the size. Further, since the cylindrical portion and the connecting portion are not separated, it is possible to provide a highly safe extension pipe.

The second invention particularly provides a connecting portion in which the resin support member of the first invention is fused to both ends of the fiber reinforced resin laminated sheet by an integral molding method, and a suction tool can be connected to one end of the resin support member. , The other end of the resin support member is provided with a second connection portion that can be connected to the vacuum cleaner main body or the hose connected to the vacuum cleaner main body, and one resin support member has a connection portion of the other. Since the second connecting portion is integrally molded with the resin support member, the fitting portion of the component is eliminated in the air passage, the structure is simplified, and the weight can be reduced without increasing the size.

In the third invention, in particular, the resin support member of the first or second invention is composed of a polyolefin-based resin, and both the fiber-reinforced resin laminated sheet and the resin support member are formed of the polyolefin-based resin. Therefore, the joint portion has an affinity, and it is possible to prevent the joint portion of the cylindrical portion composed of the fiber-reinforced resin laminated sheet forming the air passage and the resin support member from being separated. Further, it is possible to prevent the joint portion of the cylindrical portion forming the ventilation path and the connecting portion made of the resin support member from being separated, and it is possible to provide a highly safe extension pipe.

In the fourth invention, in particular, at least one or more through holes are arranged at both ends of the cylindrical fiber reinforced plastic laminated sheet of any one of the first to third inventions, and at the time of integral molding with the resin support member. The melted resin is configured to enter the through hole, and the resin of the resin support member that has entered the through hole provided in the fiber reinforced resin laminated sheet acts as a resistance from the central axis direction of the cylindrical portion and creates a ventilation path. It is possible to prevent the joint portion between the cylindrical portion to be formed and the connecting portion made of the resin support member from being separated, and it is possible to provide an extension pipe with high safety.

In the fifth invention, in particular, a thin-walled portion having a thin thickness is provided on the outer periphery of the fiber-reinforced resin laminated sheet of any one of the first to fourth aspects, and the resin thickness of the resin support member in the thin-walled portion is increased. , The bonding strength of the outer circumference of the fiber reinforced resin laminated sheet is increased, and the rigidity against peeling is also increased. Therefore, the joint portion of the fiber reinforced resin laminated sheet forming the air passage and the cylindrical portion composed of the resin support member should be separated. Can be prevented. Further, it is possible to prevent the joint portion of the cylindrical portion forming the ventilation path and the connecting portion made of the resin support member from being separated, and it is possible to provide a highly safe extension pipe.

The sixth invention is provided with extension portions extending in the axial direction at both ends of a substantially cylindrical shape of the fiber-reinforced resin laminated sheet of any one of the first to fifth inventions, and is composed of a resin support member. When the connected connection part receives an external force perpendicular to the central axis direction of the cylindrical part, in order to reduce the load on the boundary between the fiber-reinforced resin laminated sheet having different rigidity and the resin support member, the cylindrical part forming the ventilation path It is possible to prevent the joint portion of the connecting portion made of the resin support member from separating, and it is possible to provide an extension pipe with high safety.

In the seventh invention, in particular, a woven fabric layer is arranged on the inner surface of a fiber-reinforced resin laminated sheet formed in a substantially cylindrical shape with the resin support member of any one of the first to sixth inventions, and the woven fabric layer is used. A large number of minute irregularities are generated on the inner surface of the air passage, and the irregularities reduce the contact area of the sucked relatively large dust and the like with the inner surface of the vent passage, and reduce the resistance at the time of sucking the relatively large dust and the like. , It is possible to prevent clogging of the inner surface of the ventilation path such as relatively large dust.

The vacuum cleaner according to the eighth invention has the extension pipe according to any one of claims 1 to 7, and is convenient to use by using a lightweight, compact and highly safe extension pipe. We can provide vacuum cleaners.

Hereinafter, preferred embodiments of the extension tube of the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

(Embodiment 1)
FIG. 1 is a right side view of an electric vacuum cleaner using an extension pipe according to the first embodiment of the present invention, FIG. 2 is a perspective view of the extension pipe, and FIG. 3 is a right side view of the extension pipe. Is a cross-sectional view from the right side of the substantially cylindrical central axis of the extension pipe, FIG. 5 is an exploded view of the extension pipe, FIG. 6 is an exploded view of an integrally molded part of the extension pipe, and FIG. FIG. 8 is a cross-sectional view of the central portion of the extension pipe in a direction perpendicular to the central axis, and FIG. 8 is a cross-sectional view showing a laminated structure of fiber-reinforced resin laminated sheets of the extension pipe.

As shown in FIG. 1, the vacuum cleaner 100 to which the extension pipe 3 in the present embodiment is connected is
A vacuum cleaner main body 1 incorporating an electric blower (not shown) that generates suction air, a suction tool 2 that sucks dust on the surface to be cleaned, and an extension pipe 3 of the present invention whose one end is connected to the suction tool 2. It is composed of a hose 4 having one end connected to the extension pipe 3 and the other end connected to the vacuum cleaner main body 1.

The suction tool 2 has a built-in rotary brush (not shown) that scoops up dust on the surface to be cleaned and an electric motor (not shown) that rotationally drives the rotary brush (not shown), and also has a suction tool pipe that transfers dust. 5 is provided, and the suction tool 2 and the extension pipe 3 are detachably connected to each other via the suction tool pipe 5. Further, at the end of the hose 4 on the extension pipe 3 side, a tip pipe 7 having a handle portion 6 to be held when the user cleans is provided, and the extension pipe 3 and the extension pipe 3 are provided via the tip pipe 7. The hose 4 is detachably connected to the hose 4. Further, a connection pipe 8 is provided at the end of the hose 4 on the vacuum cleaner body 1 side, and the intake port 9 of the vacuum cleaner body 1 and the hose 4 are detachably connected via the connection pipe 8. ing.

As shown in FIGS. 2 and 3, the extension pipe 3 has a substantially cylindrical pipe body 10 having a connection portion having one end connectable to the suction tool pipe 5 and one end connectable to the tip pipe 7. Fitting that fits the first cover body 11 that covers the tail lock 12 that engages with the suction tool pipe 5 when connected to the suction tool 2 and the groove portion (not shown) provided in the vacuum cleaner main body 1 in the stored state. The second cover body 13 provided with the joint portion 14, the third cover body 15 covering the connection pin 16 electrically connected to the hose 4, and the third cover body 15 with respect to the central axis of the pipe body 10. It is composed of a fourth cover body 17 arranged in the opposite direction.

Here, with respect to the extension pipe 3, the direction that the user can see when using the vacuum cleaner 100 in the direction perpendicular to the central axis having a substantially cylindrical shape can be seen by the user in the vertically upward direction. The direction that cannot be defined is defined as the vertical downward direction.

As shown in FIG. 6, the fiber reinforced resin laminated sheet 18 is formed in a substantially perfect circular shape. The resin support member 19 includes a rod-shaped portion into which the wire rod holding member 21 for accommodating the wire rod 20 described later is fitted, a connecting portion 44 to which the suction tool pipe 5 can be connected to one end of the resin support member 19, and the resin support member 19. Three points with a second connecting portion 45 to which the tip pipe 7 can be connected at the end are integrally molded. The rod-shaped portion of the resin support member 19 is formed so as to extend in the central axis direction of both ends of the fiber-reinforced resin laminated sheet 18.

Further, the wire rod holding member 21 is formed in a shape for accommodating the wire rod 20 made of copper-plated piano wire in the lower portion in FIG. 6, and is fitted into the rod-shaped portion of the resin support member 19 with the wire rod 20 stored. It is configured to fit. In this way, the wire rod 20 is sandwiched and held between the rod-shaped portion of the resin support member 19 and the wire rod holding member 21.

In the center of the lower portion of the fiber-reinforced resin laminated sheet 18 having a substantially perfect circular shape, a slit portion 46, which is a notch hole formed by extending in the central axial direction of both ends of the fiber-reinforced resin laminated sheet 18, is made of resin. The rod-shaped portion of the support member 19 is provided with an allowable length.

Then, a unit in which the wire rod 20 is held between the rod-shaped portion of the resin support member 19 and the wire rod holding member 21 is provided in the center of the lower portion of the fiber reinforced resin laminated sheet 18 having a substantially perfect circular shape. By expanding the portion 46, it can be accommodated inside the fiber-reinforced resin laminated sheet 18 having a substantially perfect circular shape. Further, the pipe body 10 is formed by integrally molding in the state of being housed in this way.

In the state shown in FIG. 7, a unit in which the wire rod 20 is held between the rod-shaped portion of the resin support member 19 and the wire rod holding member 21 is housed inside the fiber-reinforced resin laminated sheet 18 having a substantially perfect circular shape. It shows a cross section that is integrally molded after being in a state of being.

That is, as shown in FIGS. 4 to 7, the substantially cylindrical pipe body 10 includes a substantially perfect circular fiber-reinforced resin laminated sheet 18 made of a polyolefin resin, a resin support member 19 made of a polyolefin resin, and copper. It is composed of a wire rod 20 made of plated piano wire and a wire rod holding member 21 made of a polyolefin resin, and the fiber reinforced resin laminated sheet 18, the resin support member 19, the wire rod 20 and the wire rod holding member 21 are integrally molded by insert molding. The pipe body 10 is completed.

Next, the above-mentioned process will be described in detail. As shown in FIG. 7, the wire rod holding member 21 is provided with a groove 28 capable of accommodating the wire rod 20 in the direction perpendicular to the central axis of the pipe body 10, and insert molding can be performed. Before this is done, the wire rod 20 is housed in the groove 28 of the wire rod holding member 21. Further, the wire rod holding member 21 is provided with a plurality of welding ribs 29 provided around the groove portion 28, and the wire rod 20 is welded while being housed in the groove portion 28 to be fixed to the groove portion 28. Has been done.

As shown in FIG. 7, the boundary portion 43 of the fiber reinforced resin laminated sheet 18 is arranged on the vertically lower side. Further, the boundary portion 43 of the fiber reinforced resin laminated sheet 18 is joined by pouring the resin of the resin support member 19 during insert molding. Further, on the boundary portion 43 side of the fiber reinforced resin laminated sheet 18, the wire rod 20 and the wire rod holding member 21 are arranged parallel to the central axis of the pipe body 10 and on the inner surface side of the fiber reinforced resin laminated sheet 18. The boundary portion 43 of the resin laminated sheet 18 is simultaneously joined with the resin of the resin support member 19 to be joined. The tip ends of both ends of the wire rod 20 are bent in the direction perpendicular to the central axis of the pipe body 10.

As shown in FIGS. 6 and 7, all the outer peripheral ends of the fiber-reinforced resin laminated sheet 18 with respect to the outer surface in the direction perpendicular to the central axis of the pipe body 10 are C-plane cut and C-plane cut. The resin support member 19 is arranged so as to cover the entire outer circumference of the fiber reinforced resin laminated sheet 18.

Further, the fiber-reinforced resin laminated sheet 18 is provided with a plurality of through holes 30 in the vertical direction from the central axis of the pipe body 10 on the vertical upper side of both ends in the central axis direction of the pipe body 10, and is formed during insert molding. The resin of the resin support member 19 is configured to flow into the through hole 30.

Further, the fiber reinforced resin laminated sheet 18 is provided with extension portions 31 in which both ends of the pipe body 10 in the central axial direction are partially extended only on the vertical upper side, and the extension portion 31 is vertically extended from the central axis of the pipe body 10. The entire surface on the directional side is configured to be covered with the resin support member 19.

As shown in FIG. 8, the fiber reinforced resin laminated sheet 18 has a laminated structure of a fiber reinforced layer 32 and a cover layer 33. The fiber reinforcing layer 32 is composed of a core layer 34, a woven fabric layer 35a, 35b, an adhesive layer 36a, 36b, 36c, and the like. The cover layer 33 is composed of a transparent layer 37, a colored layer 38, a transparent protective layer 39, and the like. Specifically, the fiber-reinforced layer 32 of the fiber-reinforced resin laminated sheet 18 is formed by laminating the woven fabric layer 35a and the woven fabric layer 35b on both surfaces of the core layer 34 via the adhesive layer 36a and the adhesive layer 36b. ..

The core layer 34 of the fiber reinforced layer 32 is made of, for example, a resin containing polypropylene as a main component, and is laminated in the form of a sheet or a film. For the core layer 34, for example, it is preferable to use a non-foamed polypropylene-based sheet. This is because, in the non-foamed polypropylene-based sheet, each laminated layer is not easily crushed during press molding. Further, the non-foamed polypropylene-based sheet can be easily formed by vacuum forming or bending processing utilizing thermal deformation.

The woven fabric layer 35a and the woven fabric layer 35b of the fiber reinforcing layer 32 are composed of, for example, a core-sheath composite fiber yarn in which the core component is a polypropylene resin and the sheath component is a polyolefin resin having a melting point lower than that of the core component. By using a polyolefin resin component having a low melting point as the sheath component, heat bonding becomes easy. The woven fabric of the woven fabric layer 35a and the woven fabric layer 35b may be a woven fabric having any structure such as plain weave, twill weave (oblique weave), satin weave, and other variable weaves.

Further, the adhesive layers 36a, 36b and 36c of the fiber reinforcing layer 32 are composed of, for example, a transparent heat-sealed polyolefin-based film. As a result, the core layer 34 and the woven fabric layer 35a and the woven fabric layer 35b can be heat-pressed and bonded together. As a result, the fiber reinforcing layer 32 can be easily laminated and integrated.

Then, the fiber reinforced resin laminated sheet 18 is formed by integrating the cover layer 33 with one surface layer of the fiber reinforced layer 32 via the adhesive layer 36c. At this time, the cover layer 33 is preferably made of, for example, a transparent polyolefin resin sheet.

That is, it is preferable that the cover layer 33 has transparency enough to allow the woven fabric layer 35a to be seen through from the outside. Since the woven fabric layer 35a is visible from the outside, the fiber reinforced resin laminated sheet 18 looks high in strength. Further, the beautifully dressed state of the fiber reinforced resin laminated sheet 18 can be kept high.

Specifically, the cover layer 33 is formed by laminating a transparent layer 37 of a polypropylene-based resin sheet, a colored layer 38, and a protective layer 39 of a polypropylene-based resin sheet. By inserting the light colored layer 38 between the protective layer 39 and the transparent layer 37, the woven fabric layer 35a of the white fiber reinforced layer 32 can be made to look like a dyed texture.

That is, the fiber-reinforced resin laminated sheet 18 of the pipe body 10 of the extension pipe 3 in the present embodiment first has the woven fabric layer 35a, via the adhesive layers 36a and 36b on both surfaces of the core layer 34 of the fiber-reinforced layer 32. 35b is pasted together and integrated. As a result, the fiber reinforcing layer 32 is formed. Next, the transparent layer 37, the colored layer 38, and the protective layer 39, which form the cover layer 33 via the adhesive layer 36c, are laminated and integrated on the surface of the woven fabric layer 35a of the fiber reinforcing layer 32. As a result, the fiber reinforced resin laminated sheet 18 is formed.

The transparent layer 37, the colored layer 38, and the protective layer 39 may be laminated and integrated in advance as the cover layer 33. In this case, the integrated cover layer 33 is laminated and integrated with the fiber reinforcing layer 32 via the adhesive layer 36c. As a result, the fiber reinforced resin laminated sheet 18 is formed.

As shown in FIGS. 4 and 5, a first cover body 11 is arranged on the pipe body 10 so as to cover the end face on the connection side with the suction tool pipe 5 and the vertically upper side of the resin support member 19. The pipe body 10 and the first cover body 11 are connected by a screw 41 and an engaging portion 11a provided on the first cover body 11.

A buckle 12 that engages with the suction tool pipe 5 when connected to the suction tool 2 is rotatably arranged between the central axis of the pipe body 10 and the first cover body 11. A buckle spring 22 is arranged between the buckles 12. Further, a terminal storage portion 23 is provided on the vertically upper side of the pipe body 10 and on the end surface on the connection side with the suction tool pipe 5, and the connection terminal 24 is stored and held.

The second cover body 13 arranged on the opposite side of the first cover body 11 with respect to the central axis of the pipe body 10 is connected to the pipe body 10, the screw 41, and the double-sided tape 25, and the second cover. The engaging portion 13a provided on the body 13 is engaged with the first cover body 11. Further, the second cover body 13 includes a fitting portion 14 that fits with the vacuum cleaner main body 1 in the stored state.
The wire rod 20 covered with the second cover body 13 is solder-connected to the lead wire 24a connected to the connection terminal 24, and the lead wire 24a is the first wiring rib 26a provided on the pipe body 10. Is wired to.

A third cover body 15 is arranged on the pipe body 10 so as to cover the end surface on the connection side with the tip pipe 7 and the vertically upper side of the resin support member 19, and the pipe body 10 and the third cover body 15 are arranged. Are connected by a screw 41. Further, a terminal storage holding portion 27 is provided on the vertically upper side of the pipe body 10 and on the end surface on the connection side with the tip pipe 7, and the connection pin 16 is stored and held.

The fourth cover body 17 arranged on the opposite side of the third cover body 15 with respect to the central axis of the pipe body 10 is connected to the pipe body 10 by a screw 41 and is provided on the fourth cover body 17. The engaged portion 17a is engaged with the third cover body 15. Further, the wire rod 20 covered by the fourth cover body 17 is solder-connected to the lead wire 16a connected to the connection pin 16, and the lead wire 16a is the second wiring provided on the pipe body 10. It is wired to the rib 26b.

The operation and operation of the extension tube 3 according to the present embodiment configured as described above will be described below.

When the user connects the suction tool 2, the extension pipe 3, and the hose 4 and starts cleaning using the vacuum cleaner 100, a suction air is generated by the electric blower (not shown). The user can operate the suction tool 2 by gripping the handle portion 6, and dust on the surface to be cleaned is sucked from the suction tool 2 together with air. The air containing dust sucked from the suction tool 2 flows into the inside of the vacuum cleaner main body 1 through the extension pipe 3 and the hose 4, and then only the dust is collected by the dust collector (not shown). ..

As described above, in the present embodiment, the pipe body 10 having a high affinity with the fiber-reinforced resin laminated sheet 18 made of a polyolefin-based resin having a relatively small specific gravity among the resins can be formed. , It is possible to reduce the weight while ensuring the physical strength against bending.

Further, since the resin support member 19 capable of connecting the pipe body 10 forming the ventilation path through which the dust passes and the suction tool 2 for sucking the dust is insert-molded, the structure is simplified and the weight is reduced without becoming large. It can be planned. Further, since the pipe body 10 and the resin support member 19 are not separated from each other, the extension pipe 3 having high safety can be provided.

Further, in the present embodiment, a resin support member 19 to which a suction tool 2 capable of sucking dust can be connected is connected to one end of a pipe body 10 forming a ventilation path, and a hose 4 connected to the vacuum cleaner main body 1 is connected to one end. Since each of the possible resin support members 19 is insert-molded, there is no fitting portion of the component in the air passage, the structure is simplified, and the weight can be reduced without increasing the size.

Further, since the fiber-reinforced resin laminated sheet 18 and the resin support member 19 are both formed of a polyolefin resin, the fiber-reinforced resin laminated sheet 18 and the resin support member 19 have an affinity at the joint and form a ventilation path. It is possible to prevent the joint portions of the configured pipe bodies 10 from separating.

Further, it is possible to prevent the joint portion of the connecting portion composed of the pipe body 10 forming the ventilation path and the resin support member 19 from separating, and it is possible to provide the extension pipe 3 having high safety. is there.

Further, in the present embodiment, the resin of the resin support member 19 that has entered the through hole 30 provided in the fiber reinforced resin laminated sheet 18 acts as a resistance from the central axis direction of the pipe body 10 to form a ventilation path. It is possible to prevent the joint portion of the connecting portion composed of the pipe body 10 and the resin support member 19 from separating, and it is possible to provide the extension pipe 3 with high safety.

Further, in the present embodiment, since the bonding strength of the outer periphery of the fiber reinforced resin laminated sheet 18 is increased and the rigidity against peeling is also increased, the fiber reinforced resin laminated sheet 18 forming the ventilation path and the resin support member 19 are composed of the fiber reinforced resin laminated sheet 18. It is possible to prevent the joint portion of the pipe body 10 from being separated.

Further, in the present embodiment, when the connecting portion composed of the resin support member 19 receives an external force perpendicular to the central axis direction of the pipe body 10, the fiber reinforced resin laminated sheet 18 and the resin support member 19 having different rigidity are obtained. In order to reduce the burden on the boundary between the two, it is possible to prevent the joint portion of the connecting portion composed of the pipe body 10 forming the ventilation path and the resin support member 19 from separating, and the extension pipe 3 having high safety. Can be provided.

Further, in the present embodiment, since the inner wall of the fiber reinforced resin laminated sheet 18 of the pipe body 10 forming the ventilation path is formed by the woven fabric layer 35b, a large number of minute irregularities are formed on the inner surface that the dust comes into contact with. .. These minute irregularities reduce the contact area of the sucked relatively large dust and the like with the inner surface of the ventilation path, and reduce the resistance when sucking the relatively large dust and the like, so that the ventilation path of the relatively large dust and the like is reduced. It is possible to prevent clogging on the inner surface.

Although not particularly shown, if a thin-walled portion is provided on the outer periphery of the fiber-reinforced resin laminated sheet 18 and the resin thickness of the portion of the resin support member 19 corresponding to the thin-walled portion is increased, the fiber-reinforced resin can be used. Since the joint strength of the outer periphery of the laminated sheet 18 is increased and the rigidity against peeling is also increased, it is possible to prevent the joint portion of the cylindrical portion composed of the fiber reinforced resin laminated sheet 18 forming the ventilation path and the resin support member 19 from being separated. can do. Further, it is possible to prevent the joint portion of the cylindrical portion forming the ventilation path and the connecting portion made of the resin support member 19 from being separated, and it is possible to provide a highly safe extension pipe.

Further, by using the lightweight, compact and highly safe extension pipe 3 in the above embodiment for the vacuum cleaner 100, it is possible to provide the vacuum cleaner 100 having excellent operability and ease of use.

As described above, the extension pipe according to the present invention has a simplified structure, can be reduced in weight without becoming large while ensuring physical strength, and is excellent in safety. It is also possible to provide a vacuum cleaner that is easy to use, and can be suitably applied to the fields and applications of household vacuum cleaners and industrial vacuum cleaners as well as various extension pipes.

1 Vacuum cleaner body 2 Suction tool 3 Extension pipe 4 Hose 5 Suction tool pipe 6 Handle part 7 Tip pipe 8 Connection pipe 9 Intake port 10 Pipe body 11 First cover body 11a, 13a, 17a Engagement part 12 Tail lock 13 Second Cover body 14 Fitting part 15 Third cover body 16 Connection pins 16a, 24a Lead wire 17 Fourth cover body 18 Fiber reinforced resin laminated sheet 19 Resin support member 20 Wire rod 21 Wire rod holding member 22 Hose lock spring 23 Terminal storage 24 Connection terminal 25 Double-sided tape 26a First wiring rib 26b Second wiring rib 27 Terminal storage holding part 28 Groove part 29 Welding rib 30 Through hole 31 Extension part 32 Fiber reinforced layer 33 Cover layer 34 Core layer 35a, 35b Textile layer 36a, 36b, 36c Adhesive layer 37 Transparent layer 38 Colored layer 39 Protective layer 41 Screw 43 Boundary part 44, 45 Connection part 46 Slit part 100 Electric vacuum cleaner

Claims (1)

A fiber-reinforced resin laminated sheet with a substantially perfect circular shape made of polyolefin resin,
An extension portion extending in the axial direction to a part of the upper side of both ends of the fiber reinforced resin laminated sheet in the vertical direction
A resin support member made of a resin having a high affinity with the fiber-reinforced resin laminated sheet,
Both ends of the resin support member are provided with a substantially cylindrical connecting portion to which a suction tool for sucking dust can be connected.
The resin support member is formed by an integral molding method including insert molding on the fiber reinforced resin laminated sheet .
The fiber-reinforced resin laminated sheet and the resin support member are fused so as to form a substantially cylindrical pipe body.
An extension pipe configured so that the vertical surface of the extension portion is entirely covered with the resin support member.

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