JP2001187007A - Connection pipe and vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum cleaner having a suction pipe and an exhaust pipe and with a connecting pipe that is connected well with a simple structure. SOLUTION: In the connection pipe apparatus, two air courses are set on an extension pipe. One is a cylindrical suction pipe part that has a communicative connection to the suction side of a motor driven blower and another is a flat exhaust pipe part 42 that has a communicative connection to the exhaust opening of the motor driven blower. Exhaust branches 106, 107 are made to be branched on the both end parts of the exhaust pipe part 42 through a mounting spacing 116. The exhaust branch 107 is fitted on the one end part of a connecting exhaust pipe part 137 of a mounting and fitting cover 131 for design. A seal member is set on the top part of the exhaust branch 106 that protrudes in the axis direction. The exhaust branch 106 of one extension pipe is fitted and inserted into another end of the connecting exhaust pipe part 137 of another extension pipe, then a closely contact part 125, which is positioned at the top part of a seal member 126, is closely connected to the top part of the exhaust branch 107. By setting the seal member 126 on the connecting prat of (the) exhaust air course side, it is possible to prevent dust from blowing up caused by air leakage. Even in a small diameter part where the inside diameter tends to be uneven, it is possible to keep air tightness securely.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a connection pipe provided with a suction pipe and an exhaust pipe, and a vacuum cleaner.

[0002]

2. Description of the Related Art Conventionally, as this type of vacuum cleaner, for example, a suction port body detachably connected to a cleaner body containing an electric blower through a suction air passage of a connecting pipe such as a hose or an extension pipe. The air is sucked in together with the dust from the suction port, the dust is trapped in the dust collecting chamber of the cleaner body, the dust is removed, and the exhaust air exhausted from the exhaust port of the electric blower is re-exited through the exhaust air path of the connection pipe. 2. Description of the Related Art There is known a configuration in which air is blown out from an inlet, dust is blown up, dust is sucked again, exhaust air is separately exhausted, and the exhaust air can be circulated and cleaned without giving a cleaning worker discomfort.

Here, for example, in a configuration in which a connecting pipe integrally includes a suction air path and an exhaust air path, in a configuration in which a suction air path and an exhaust air path are provided coaxially as in a double pipe structure,
Since the formation of the connection pipe becomes complicated, they are integrally formed in parallel.

[0004]

By the way, in the above-mentioned structure in which a plurality of air passages of the suction air passage and the exhaust air passage are integrally formed in parallel, a suction air passage is required to connect a plurality of connecting pipes. In addition, it is necessary to set the axial center of the exhaust air passage in a predetermined positional relationship. In particular, in a configuration in which one end of the intake air passage and the exhaust air passage is branched and the connection portion is at least three or more, this is high. Accuracy is required, but in a configuration in which a plurality of connecting pipes are connected by a taper fitting whose structure is simple due to molding variations, etc., it is difficult to obtain airtightness of the connecting portion even if fitting is possible. In particular, when the airtightness of the exhaust pipe is not maintained, the exhaust air blows out, and there is a problem that dust on the floor is blown up or blown to the user.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a connection pipe and a vacuum cleaner which can obtain a good connection with a simple structure even with a suction pipe and an exhaust pipe. Aim.

[0006]

According to a first aspect of the present invention, there is provided a connecting pipe including a suction pipe communicating with a suction side of an electric blower of a cleaner body, an exhaust pipe communicating with an exhaust side of the electric blower, and the exhaust pipe. And a seal member that is provided at the end and is in close contact with a separate exhaust pipe to be connected.

[0007] The exhaust pipe includes a suction pipe communicating with the suction side of the electric blower of the cleaner body and an exhaust pipe communicating with the exhaust side of the electric blower. Is provided at the end of the airtight connection with a separate exhaust pipe and a seal member, thereby reliably preventing dust from being blown up due to airflow leaking from the exhaust pipe.

According to a second aspect of the present invention, there is provided a connecting pipe which is connected to a suction side of an electric blower of a vacuum cleaner main body, and which is inserted into a separate suction pipe provided at an end of the suction pipe and connected thereto. -Shaped suction connection part, an exhaust pipe communicating with the exhaust side of the electric blower, and a cylinder having a diameter different from that of the suction connection part inserted into a separate exhaust pipe provided at an end of the exhaust pipe and connected thereto. And a sealing member provided at one end of the suction connection portion and the exhaust connection portion having a smaller diameter.

[0009] A cylindrical suction connection portion inserted into a separate suction pipe provided at the end of the suction pipe communicating with the suction side of the electric blower of the cleaner body, and an exhaust side of the electric blower. One of the end portions having a smaller diameter dimension between the suction connection portion and a cylindrical exhaust connection portion having a different diameter from the suction connection portion which is inserted into a separate exhaust pipe provided at the end of the exhaust pipe communicating with the suction pipe and having a different diameter. In order to provide a seal member, the connecting part whose diameter is small and cannot be lengthened to maintain strength is made by the sealing member, and the connecting part which maintains strength even if the diameter is long is inserted separately. The airtightness is maintained by increasing the length of insertion into the tube.

According to a third aspect of the present invention, in the connection pipe according to the second aspect, the suction pipe has a suction fitting portion into which a separate suction connection portion to be connected is fitted, and the exhaust pipe has An exhaust fitting portion into which a separate exhaust connecting portion to be connected is fitted, wherein the seal member is fitted into at least one of the inner surfaces of the suction fitting portion and the exhaust fitting portion; An outer peripheral surface of an end portion which is fitted into and adhered to an end portion of the separate suction connection portion and an end portion of the separate exhaust connection portion has an inclined surface which inclines with a small diameter toward the tip.

The suction fitting portion of the suction pipe into which the separate suction connection portion to be connected is fitted into the seal member, and the exhaust fitting portion of the exhaust pipe into which the separate exhaust connection portion to be connected is fitted. Of these, at least one of the inner surfaces is provided with an inclined surface whose outer peripheral surface of the end portion that is fitted and closely attached to the inner surface is inclined toward the tip with a small diameter, so that the connection is securely guided by the inclined surface during connection. Since the airtightness of the state is maintained and the seal member for maintaining the connected state airtight is provided in the suction fitting portion and the exhaust fitting portion which are not exposed to the outside, the cleaning worker may accidentally remove the sealing member. And the state of being arranged at a predetermined position is surely maintained.

According to a fourth aspect of the present invention, there is provided the connecting pipe according to any one of the first to third aspects, wherein the sealing member includes a contact portion which is deformed and adhered by an air flow flowing through the suction pipe and the exhaust pipe. Things.

[0013] Since the sealing member is provided with a close contact portion which is deformed and adhered to by the airflow flowing through the suction pipe and the exhaust pipe, airtightness in the use state of the vacuum cleaner can be reliably obtained.

According to a fifth aspect of the present invention, there is provided a connecting pipe according to any one of the first to fourth aspects, wherein the seal member is in contact with one of the end faces of the separate suction pipe and the exhaust pipe to be connected. It has a contact portion.

Further, since a contact portion is provided for contacting either one of the end faces of the separate suction pipe and exhaust pipe connected to the seal member, the direction and diameter of the flow of the wind of the suction pipe and the exhaust pipe in the connected state. Airtightness in both directions can be reliably obtained with a simple structure.

According to a sixth aspect of the present invention, there is provided an electric vacuum cleaner comprising: a cleaner main body; and the connecting pipe according to any one of the first to fifth aspects connected to the cleaner main body.

In addition, since the connection pipe according to any one of claims 1 to 5 is provided with a suction pipe and an exhaust pipe so that a good connection can be obtained with a simple configuration, the handleability is improved and the cleaning property is improved. The cost can be reduced by improving the manufacturability.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vacuum cleaner having an extension pipe according to the present invention will be described below with reference to the drawings.

In FIG. 18, reference numeral 1 denotes a cleaner main body, which is a lower case 2a having an open upper surface, and an upper case for closing the rear upper surface of the lower case 2a.
2b has a main body case 2 as a case body having a front upper surface opened by sandwiching and joining a bumper 3 to a peripheral edge including a front surface, and the main case 2 has an opening at a front upper surface openably and closably closed. The cover 4 is formed so as to be rotatably supported by a shaft.

The main body case 2 is provided with a rotatable revolving wheel (not shown) on the front lower surface in the traveling direction, and large-diameter driven rear wheels 6, 6 are rotatably provided on the rear side surface of the main body case 2. , The cleaner body 1 includes a turning wheel and a driven rear wheel 6,6.
And can run on the floor. A handle 7 slidable in the up-down direction is provided on the upper part of the main body case 2.

Further, in the cleaner body 1, an electric blower chamber (not shown) for accommodating an electric blower and having an exhaust port of the electric blower open is formed on the rear side, and communicates with the suction side of the electric blower. In addition, a dust collecting chamber which has a built-in dust collecting filter and which is open at the top and opened and closed by the lid 4 is formed on the front side. Further, on the front side of the cleaner body 1, there are provided connecting portions 9 each of which opens an exhaust port (not shown) and a suction port communicating with the dust collecting chamber. The cleaner body 1 has one end communicating with the electric blower room and the other end connected to the connecting portion 9.
A recirculation path (not shown) communicating with the exhaust port is provided. The connector 9 is provided with a connector (not shown) having a pair of electric contacts to which power is supplied.

On the other hand, reference numeral 10 denotes a hose serving as a connecting pipe. The hose 10 comprises a flexible hose body 11 and a hose body 11.
A connecting pipe 12 which is provided at one end of the hose body and is detachably inserted into and connected to the connecting section 9 of the cleaner body 1; and an extension pipe 13 or a connecting pipe which is provided at the other end of the hose body 11 as a connecting pipe. Handle 15 to which the suction port body 14 is detachably connected
It is composed of The connection pipe section 12 is provided with a hose exhaust connection section (not shown) that communicates with and connects to the exhaust port of the connection section 9 of the cleaner body 1 and a hose suction connection section that communicates with and connects to the suction port. . Also, the hose body
The hose 11 has a hose exhaust passage (not shown) having one end connected to the hose exhaust connection portion, and a hose suction passage having one end connected to the hose suction connection portion. Further, as shown in FIG. 19, the grip tube 15 is provided with a hose exhaust communication part 17 connected to the other end of the hose exhaust path and a hose suction communication part 18 connected to the other end of the hose suction path. I have.

Further, the connection pipe section 12 is provided with a connector section having a pair of pin terminals (not shown) which are detachably connected to the connector section of the cleaner body 1. The connector section is electrically connected to an electric wire (not shown) built in the hose 10. Further, this electric wire is connected to a terminal, which is a pair of electric contacts (not shown) provided at the distal end portion of the gripping tube 15, through an operation means 20 having a plurality of switches 19, 19 provided on the gripping tube 15. It is electrically connected. At the distal end of the gripping tube 15, there is provided a clamp body 21 which is detachably engaged with the extension tube 13 or the suction port body 14 to be connected thereto and which holds the same.

Further, as shown in FIG. 20, the suction port body 14 has a suction chamber 26 having a suction opening 25 formed on the lower surface thereof formed therein so as to be partitioned therein. Has 27. And, in this case body 27,
In the suction chamber 26, a rotary cleaning body 28 is rotatably arranged facing the suction opening 25. Further, in the case body 27, an electric motor (not shown) for driving the rotary cleaning body 28 to rotate is disposed.

At the approximate center of the rear part of the case body 27, the other end of a communication pipe 29, one end of which is connected to the gripping pipe 15 or the extension pipe 13 of the hose 10, is pivotally supported. The communication pipe 29 is connected to the hose exhaust communication section 17 and the hose suction communication section 18 of the gripping pipe 15 or the distal end side of an extension pipe 13 described later, and a suction port body exhaust opening to one end. A connection pipe 32 having a connection portion 30 and a suction port body suction connection portion 31 is provided. Further, the communication pipe 29 is provided with a pin terminal (not shown) that is connected to an electric motor provided in the suction port body 14 via an electric wire.

In the vicinity of the front side edge of the horizontally long suction opening 25 of the case body 27, a nozzle portion 34 that opens like a slit along the front side edge of the suction opening 25 is provided. Further, the case body 27 is provided with a suction port body exhaust path 36 having one end communicating with the suction chamber 26 via the nozzle section 34 and the other end communicating with the suction port body exhaust connection section 30 of the connection pipe 32. At the same time, one end communicates with the suction chamber 26 and the other end connects to the suction port body suction connection portion 31 of the connection pipe 32.
Is provided with a suction port body suction passage 37 communicating with the suction port body. In addition,
The suction port body suction connection portion 31 is provided with a clamp engaging recess 39 to which the clamp body 21 can be disengaged.

On the other hand, as shown in FIGS. 2 to 8, the extension pipes 13 and 13 are provided with a suction pipe 41 as a suction pipe and an exhaust pipe 42 as an exhaust pipe. It is provided substantially in parallel in the position.

Then, the suction pipe portion 41 is provided in the manner shown in FIGS.
As shown in FIG. 5, a cylindrical main suction pipe 45 is provided to easily suck in large dust. In addition, at both ends in the axial direction of the suction main pipe 45, the design is made by expanding the outer peripheral surface of the suction main pipe 45 in a direction gradually separated toward the end so as to have a sense of unity with the exhaust pipe section 42. Pair of cover parts to improve
46, 46, 47, 47 are provided in series. As shown in FIGS. 1 and 13, the distance between the lower edges of the suction pipes 41 on the side where the exhaust pipes 42 are located is such that the cover pipes 46, 46, 47, 47 It is wider than the distance between the upper edge and the opposite side, and is curved to cover the suction main pipe 45, and has a substantially C-shaped cross section. The cover 46 located at the base end connected to the cleaner main body 1 or the hose 10, which is one end of the suction main pipe 45, has an attached dimension in the axial direction of the suction main pipe 45. It is formed so as to have a shorter dimension than the cover 47 located on the distal end side to be connected.

Further, each of the cover portions 46 and 47 has, in particular, FIG.
As shown in FIG. 4, the inner surface facing the suction main pipe 45 is curved and continues to the outer peripheral surface of the suction main pipe 45, and is located on the narrow side opposite to the exhaust pipe section 42 from the central axis of the suction main pipe 45. Reinforcing ribs 48 as connection portions are provided at positions displaced toward the upper edge. The reinforcing ribs 48 are formed with mounting attachment holes 49 as engagement holes, respectively. The mounting engagement hole 49 on the cover part 47 on the distal end side of the suction main pipe 45 to which the suction port body 14 is connected is connected to the mounting engagement hole 49 on the cover part 46 on the base end side. The length of the main pipe 45 in the axial direction is formed long.

Further, as shown in FIG. 2 in particular, flat end portions of the cover portions 46 and 47 are provided with flat plate-shaped cover ends 51 which are continuous with the end edges of the suction main pipe 45, respectively. And
The base end, which is one end of the suction main pipe 45, has a slope 52a on the outer peripheral surface so that the outer diameter becomes slightly smaller from the cover end 51 to the front end coaxially with the suction main pipe 45. Overhang and hose
As a suction connection part which is inserted into the hose suction communication part 18 of the gripping pipe 15 of the tenth or the tip side which is the other end side of the suction main pipe 45 of the other extension pipe 13 and is fitted almost in an airtight manner and taperedly fitted. Are provided integrally with each other. In addition, the suction main pipe on the tip side
The inner diameter of 45 is formed so that the communication pipe portion 52 of another extension pipe 13 and the suction port body suction connection portion 31 of the suction port body 14 can be fitted to each other, thereby forming a suction fitting section 45a.

On the outer peripheral surface of the communicating pipe portion 52, a clamp engaging concave portion 39 similar to the suction port body 14 is provided in a concave shape on the upper surface opposite to the side where the exhaust pipe portion 42 is located. ing. Further, on the outer peripheral surface of the communication pipe portion 52, cover portions 46 and 47 are provided.
A connection locking rib 53 is provided on the upper edge side of the narrower side and closer to the distal end side than the cover end 51 and protrudes radially in a wall shape. In addition, the cover end portion 51 on the side from which the communication tube portion 52, which is the base end side, protrudes is located at the lower edge that is continuous with the lower edge on the wide side of the cover portions 46 and 47, and has a concave engagement recess 54. Each of the engagement recesses 54 has a notch formed at the approximate center of the bottom edge thereof.

Further, at the end of the suction main pipe 45 on the side from which the communication pipe portion 52, which is the base end, protrudes, a connection locking rib 53 is provided on the distal end side of the outer peripheral surface at the center of the outer peripheral surface. The stopper rib has a reinforcing engagement rib 57 projecting upward from the center of the outer peripheral surface. Further, on the inner surface side of the cover portion 46, a wall-shaped guide rib 58 is provided in a vertical direction continuously from the edge of the mounting engagement hole 49 to the upper edge of the cover portion 46.

At the end of the suction main pipe 45, a cover
A decorative cosmetic cover 60 as a cover body that continuously covers the outer peripheral surface of the suction main pipe 45 from the upper edge of 46 is detachably attached. On the inner surface of the decorative cover 60 facing the outer peripheral surface of the suction main pipe 45, a reinforcing locking rib 61 that engages with the reinforcing engaging rib 57 is protruded. In addition, the edge of the decorative cover 60 projects in the same direction as the
A mounting engagement piece 62 as an engagement claw that removably engages with the edge of the 48 mounting engagement hole 49 is provided so as to be elastically deformable. In addition, a connection locking projection 64 is provided on an end edge of the decorative cover 60 so as to protrude so as to be flush with the connection locking rib 53.

A substantially circular pin through hole 66 is provided at a position corresponding to the pin engaging recess 55 in the cover end 51 on the front end side, which is the other end of the suction main pipe 45.

On the outer peripheral surface of the suction main pipe 45 on the distal end side, a connection engaging rib 68 projecting in the same direction as the connection locking rib 53 into a wall shape is provided at the end of the suction main pipe 45. The connection locking rib 53 is provided on the intermediate portion side of the cover portion 51 so as to form a stepped concave portion 69 capable of engaging and disengaging from the cover end portion 51. In addition, on both side edges in the protruding direction of the coupling engagement rib 68, a mounting engagement concave portion 70 which is located at the base end portion of the coupling engagement rib 68 and is concave toward the side and the distal direction of the suction main pipe 45 is provided. Is provided. And
A positioning wall portion 71 is provided in a wall shape at an edge of the mounting engagement concave portion 70 located on the base end side of the suction main pipe 45.

The end of the suction main pipe 45 on the side where the coupling engagement rib 68 is provided has an outer peripheral surface surrounded by an upper edge on the narrow side of the cover portion 47. A rectangular frame-shaped reinforcing engagement frame rib 73 is projected in the same direction as the direction. Further, on the outer peripheral surface of the suction main pipe 45 surrounded by the reinforcing engagement frame ribs 73, an engaging / removing hole 74 is formed so as to penetrate the inner peripheral surface, and the boss rib bulging upward. A part 75 is provided. Also, the clamp body is provided on the reinforcing engagement frame rib 73.
A concave shaft support concave portion 78 is provided facing upward so as to rotatably support the 21 rotation shaft 77.

At the other end of the suction main pipe 45,
A clamp cover 81 as a cover body that continuously covers the outer peripheral surface of the suction main pipe 45 from the upper edge of the cover part 47 and defines a clamp chamber 80 that houses the clamp body 21 therein is detachably attached. Suction main pipe of this clamp cover 81
On the inner surface facing the outer peripheral surface of 45, a not-shown pivoting rib is provided which projects opposite to the pivoting recess 78 and engages and holds the rotating shaft 77 of the clamp body 21 in the pivoting recess 78. Further, a mounting engaging piece 62 projecting from the edge of the clamp cover 81 in the same direction as the supporting rib and having a distal end removably engaging with the edge of the mounting engaging hole 49 of the reinforcing rib 48 projects elastically. Has been established. In addition, a mounting engagement piece protrudes inward from an end edge of the clamp cover 81 and is removably engaged with the mounting engagement recess 70.
Attachment claw to attach clamp cover 81 with 62
82 are provided. The mounting locking claw portion 82 contacts the positioning wall portion 71 in a state of being engaged with the mounting engagement concave portion 70, thereby preventing the clamp cover 81 from moving to the base end side of the suction main pipe 45.

Further, the clamp cover 81 is provided with an operation through hole 86 through which the operation portion 85 of the clamp body 21 is inserted so as to be able to advance and retreat. Then, the clamp cover 81 is connected to the suction main pipe 45.
The clamp piece 21 has a clamp piece 88 of the clamp body 21 which engages with the clamp engagement recess 39 by a coil spring 87 as a biasing means whose one end is positioned and held by the boss rib portion 75. The operating portion 85 of the clamp body 21 protrudes from the operating through hole 86 while the operating portion 85 projects from the operating through hole 86, and the operating portion 85 protruding from the operating through hole 86 is pressed against the bias of the coil spring 87, thereby clamping the clamp piece.
88 is rotatably disposed so as to retreat from the engagement / disconnection hole 74.

As shown in FIG. 8, the outer peripheral surface between the cover portions 46 and 47 of the suction main pipe 45 is continuous with the outer peripheral surface of the cover portions 46 and 47 and the side where the exhaust pipe portion 42 is located. A cover skirt portion 90 that gradually expands downward is provided. On the outer peripheral surface of the suction main pipe 45 on the side where the exhaust pipe portion 42 is located, a plurality of long wall-shaped lead wire holding ribs 91 are protruded substantially in parallel along the axial direction. , 91, a lead wire holding recess 93 for mounting and holding a lead wire 92 for supplying power from the cleaner body 1 to the electric motor of the suction opening body 14 is formed.

Further, as shown in FIG. 13 in particular, on the outer peripheral surface on the base end side of the suction main pipe 45 from which the communication pipe section 52 protrudes, the lead wire 92 is located on the inner surface side of the cover section 46. Terminal pin 94, which is connected to one end of the
A pin holding rib 95 for mounting and holding is provided. Also, on the outer peripheral surface on the distal end side of the suction main pipe 45 on the opposite side, it is located on the inner surface side of the cover part 47 and is bent to be connected to the other end of the lead wire 92 so as to close the pin through hole 66. Terminal fittings 96
Is provided with a terminal fitting holding rib 97 for attaching and holding the terminal.

Further, on the outer peripheral surface of the suction main pipe 45,
Screw bosses 98 for screwing are provided at both ends where the cover portions 46 and 47 are provided, respectively. In addition, communication pipe section
On the outer peripheral surface on the base end side of the suction main pipe 45 from which the 52 protrudes, a holding rib 99 which is continuous with the cover end 51 and protrudes in the same direction as the protruding direction of the screw boss 98 is provided. And this holding rib
On both sides of the distal end of 99, holding engagement recesses 100, 100 are provided in an arc shape, respectively.

On the other hand, the exhaust pipe 52 is formed by blow molding, for example, and is shown in FIGS. 2 to 8 and FIGS.
As shown in FIG. 7, a longitudinal exhaust main pipe 105 and this exhaust main pipe
An exhaust branch pipe 106 and an exhaust branch pipe 107 as an exhaust connection part which are integrally formed in a bifurcated manner at both ends in the longitudinal direction of 105.
And

As shown in FIG. 8, in particular, the exhaust main pipe 105 has a substantially rectangular outer surface portion 110 whose both longitudinal edges are curved in the same direction in an arc shape, and both curved outer edges of the outer surface portion 110. And a pair of side portions 111 whose outer surfaces are continuous with the cover skirt portion 90 by abutting engagement with the edge of the cover skirt portion 90 of the suction pipe portion 41.
, 111, and a curved surface portion 112 that is concavely curved corresponding to the outer peripheral surface of the suction main pipe 45 of the suction pipe section 41 to form a substantially rectangular cylindrical shape. At the approximate center of the curved surface portion 112, there is provided a wiring concave groove portion 113 for inserting and accommodating a plurality of lead wire holding ribs 91 of the suction pipe portion 41 in a concave groove shape along the longitudinal direction. Further, at both ends in the axial direction of the exhaust main pipe 105, as shown in FIG. 15, positioning engagement grooves 114 having a concave groove shape in the circumferential direction are provided so that the outer peripheral surface is smaller in diameter than the exhaust main pipe 105. Each provided neck 115 is provided.

At the tip of the necks 115, 115, an exhaust branch pipe 106 having an axial direction along the longitudinal direction of the exhaust main pipe 105 is provided.
, 107 are provided in a bifurcated manner with a mounting gap 116 therebetween. The exhaust branch pipe 106 serving as an exhaust connection part corresponding to the base end side of the suction pipe part 41 is formed longer than the exhaust branch pipe 107 corresponding to the distal end side of the suction pipe part 41. Further, the sum of the cross-sectional areas of the exhaust branch pipes 106, 106, 107, 107 forming a pair is formed to be substantially the same as the cross-sectional area of the exhaust main pipe 105, respectively. Therefore, a pair of exhaust branch pipes 106,
The outer dimensions of 106, 107, 107 are wider than the distance between the outer surfaces of side portions 111, 111, which is the width dimension of exhaust main pipe 105. An inclined surface 11 is formed on the inner peripheral edge of the distal end of each exhaust branch pipe 106, 106, 107, 107 so as to expand toward the distal end.
7 are provided. Also, each exhaust branch pipe 106,
On the outer peripheral surface of each of 106, 107, 107, there is provided a lead wire escape groove 118 in which the lead wire 92 is engaged in a concave groove shape in a direction inclined from the mounting gap 116 side toward the distal end.

Further, on the outer peripheral surface of the longer exhaust branch pipe 106 corresponding to the base end side of the suction pipe section 41, the suction pipe section 41 projects from the circumferential surface position on the curved surface section 112 side toward the suction pipe section 41 side. Locking projection 12 which engages with the engagement recess 54 of the cover and is flush with the cover end 51.
0 and 120 are protruding respectively. These locking projections 12
0 has a semicircular pin engaging recess 55 with which the terminal pin 94 engages. Further, these exhaust branch pipes 106
As shown in FIGS. 1 and 17, a seal mounting groove portion 122 having a concave groove shape is provided along the circumferential direction on the outer peripheral surface of the front end. A ring-shaped fitting portion 124 that engages with the seal mounting groove portion 122 is provided at the distal end portion of the exhaust branch pipe 106.
A seal member 126 having a contact portion 125 as a contact portion which is continuous with one edge of the exhaust branch pipe 106 and covers the tip of the exhaust branch pipe 106 is attached. The contact portion 125 of the seal member 126 is
It is formed so as to be curved inwardly away from the end surface of the exhaust branch pipe 106 and to have a free end at the tip end. The outer diameter of the fitting portion 124 of the sealing member 126 is
A contact rib portion 127 having a diameter larger than the outer diameter of 106 is provided integrally.

The exhaust pipe section 42 is connected to the exhaust branch pipes 106 and 10.
The portion 7 is attached to the suction pipe section 41 by an attachment cover 130 as a cover body and an attachment fitting cover 131 as a cover body, and the extension pipe 13 is integrally formed. In addition,
The mounting cover 130 has a substantially U-shaped cross section so that the outer surface thereof is continuous with the cover portion 46. Also, the mounting cover 130
One end is bent inward so as to be able to engage with the neck 115 of the exhaust pipe 42, and the other end is a cover end of the suction pipe 41.
51 and the locking projection 120 are formed flush with each other. Further, a holding wall portion 133 is provided on the inner edge of the other end of the mounting cover 130 so that the leading edge contacts the leading edge of the holding rib 99. The holding ribs 99 are provided on both ends of the holding wall 133.
Similarly, holding engagement recesses 100 are provided in an arc shape and abut against the outer peripheral surface of the exhaust branch pipe 106. Further, a screw boss fitting portion 134 for fitting the tip of the screw boss 98 of the suction pipe portion 41 protrudes from the inner surface of the mounting cover 130. The outer surface of the mounting cover 130 is the cover 4 of the suction pipe 41.
6. The cover end portion 51, the outer surface portion 110 and the side surface portions 111, 111 of the exhaust pipe portion 42 are continuously connected in series, and the base end portion of the longer exhaust branch tube 106 is positioned and held by the holding engagement recesses 100, 100. It is attached to the base end side of the suction pipe part 41 with a screw 135 so as to cover it. When the mounting cover 130 is mounted, the projecting dimension of the exhaust branch pipe 106 protruding from the holding wall 133 of the mounting cover 130 is the communication pipe protruding from the cover end 51 flush with the holding wall 133. Shorter than 52.

The mounting fitting cover 131 is a mounting cover.
Similar to 130, the outer surface is formed in a substantially U-shaped cross section so as to be continuous with the cover portion 47. Then, the mounting mat cover 131
One end is bent inward so as to be able to engage with the neck 115 of the exhaust pipe 42, and the other end is a cover end of the suction pipe 41.
It is formed flush with 51. Also, the mounting mating cover 131
On the inner surface side, a pair of connecting exhaust pipe portions 137, 137, serving as exhaust fitting portions, each of which is formed into a cylindrical shape from the intermediate portion to the other end edge, and into which the tip of the shorter exhaust branch pipe 107, 107 is fitted. 13
7 are provided. In addition, these connection exhaust pipe parts 137,
137 is a seal member 12 as shown in FIGS.
The distal end portion of the exhaust branch pipe 107 in the long direction to which 6 is attached is formed so as to be fitted airtightly.

Further, on the inner surface of the mounting fitting cover 131,
A screw boss fitting portion 134 that fits the tip of the screw boss 98 of the suction pipe portion 41 protrudes. Then, the mounting mat cover 131
The outer surface is continuously connected to the cover portion 47, the cover end portion 51 of the suction pipe portion 41, the outer surface portion 110 and the side portions 111, 111 of the exhaust pipe portion 42, and the distal end portion of the shorter exhaust branch pipe 107 is connected and exhausted. The suction pipe 41 is attached to the distal end of the suction pipe 41 by screws 135 so as to cover the pipe while fitting and holding the pipe. Note that the exhaust pipe 107
In the state where the tip portion of
A moving gap 139 is formed between the outer surface of the exhaust pipe 107 and the inner surface of the fitting cover 131 along the axial direction of the exhaust pipe 107 so that the exhaust pipe 107 and the fitting cover 131 can relatively move.

[0049] At the distal end of one of the two extension tubes 13, 13 having the same configuration, a concave hook portion (not shown) provided on the rear and bottom surfaces of the cleaner body 1 is engaged and disengaged. A hook portion 142 having a hooking claw portion 141 to be freely engaged is provided.

Next, the operation of assembling the extension pipe of the above embodiment will be described.

A lead wire 92 having a terminal pin 94 connected to one end and a terminal fitting connected to the other end in advance is mounted on a separately formed lead wire holding recess 93 of the suction pipe portion 41.

The connecting exhaust pipe portion of the mounting fitting cover 131
Exhaust pipe section 42 formed separately by blow molding on 137, 137
The fitting ends of the exhaust branch pipes 107, 107 are fitted into the exhaust branch pipes 107, 107, and the fitting fitting cover 131 is engaged with the exhaust branch pipes 107, 107 of the exhaust pipe section 42.

At the time of mounting the fitting cover 131, the distal ends of the exhaust branch pipes 107, 107 are fitted so that the direction of the air passage of the exhaust pipe section 42 intersects the axial direction of the connecting exhaust pipe section 137. After being inserted inside the joint cover 131, it is locked to the end edge of the connection exhaust pipe portion 137. Thereafter, the exhaust main pipe 105 is connected to the exhaust branch pipe 10.
7 rotates around the end edge of the connected exhaust pipe portion 137 to be locked, and the narrow end edge of the mounting fitting cover 131 is connected to the exhaust pipe portion.
The entirety of the exhaust branch pipes 107, 107 is inserted into the inside of the mounting fitting cover 131 by engaging with the neck 115 of 42. In this state, the distal end portions of the exhaust branch pipes 107, 107 are connected to the exhaust pipe sections 137, 137 in a state where the outer surfaces of the exhaust branch pipes 107, 107 are in contact with the inner surface side of the fitting cover 131 so that no moving gap 139 is formed. It is in the state fitted to. Then, the exhaust pipe portion 42 is relatively moved toward the attachment fitting cover 131 which is the direction of the air passage, and the narrow edge of the attachment fitting cover 131 contacts the end of the exhaust main pipe 105. The mounting fitting cover 131 is mounted on the exhaust branch pipes 107 of the exhaust pipe section 42 and mounted.

In this state, the wiring groove 113 of the exhaust pipe 42
The lead wire holding ribs 91 of the suction pipe portion 41 are inserted into the suction pipe portion 41 so that the side surface portion 111 of the exhaust pipe portion 42 comes into contact with the edge of the cover skirt portion 90 of the suction pipe portion 41, and the mounting fitting cover 131 Abuts on the lower edge of the cover portion 47 of the suction pipe portion 41 to form the exhaust pipe portion 42.
And the suction pipe section 41. Further, the side edge of the mounting cover 130 is covered with the suction pipe 41 so as to cover the exhaust pipe 106 of the exhaust pipe 42.
Abuts and engages with the lower edge of the cover portion. Then, the mounting cover 130 and the mounting fitting cover 131 are screwed, respectively, and the suction pipe 41 and the exhaust pipe 42 are integrally assembled.
In joining the exhaust pipe section 42 and the suction pipe section 41, the lead wire 92 is inserted into the lead wire escape groove 118 of the exhaust branch pipes 106 and 107, and the lead wire 92 is inserted between the exhaust pipe section 42 and the suction pipe section 41. This prevents damage such as disconnection of the lead wire 92.

Further, the reinforcing locking ribs 61 of the decorative cover 60 are engaged with the reinforcing engaging ribs 57 of the suction pipe portion 41, and the mounting engaging pieces 62 of the decorative cover 60 are connected to the reinforcing ribs 48 of the suction pipe portion 41. The decorative cover engages with the mounting engagement hole 49, and is provided on the base end side of the suction pipe portion 41.
Attach 60. Further, the clamp piece 88 of the clamp body 21 to which the coil spring 87 is mounted is positioned in the engagement / disengagement hole 74 of the suction pipe 41, and the rotating shaft 77 of the clamp body 21 is engaged with the shaft support recess 78 of the suction pipe 41. Then, the clamp body 21 is placed on the distal end side of the suction pipe section 41. In this state, the operation through hole 86 of the clamp cover 81 is
The clamp portion 81 of the clamp cover 81 is engaged with the mounting engagement hole 49 of the reinforcing rib 48 of the suction tube portion 41 so that the operation portion 85 of the clamp body 21 is positioned at Part 41
And the extension tube 13 is assembled and formed.

Next, the cleaning operation of the above embodiment will be described.

At the time of cleaning, the connection pipe 12 of the hose 10 is inserted into the connection 9 of the cleaner body 1 and connected. Further, the proximal end side of the extension tube 13 is connected to the grip tube 15 of the hose 10. That is, the communication pipe part 52 of the extension pipe 13 is fitted into the hose suction communication part 18 of the gripping pipe 15, and the exhaust pipe 106 of the exhaust pipe part 42 of the extension pipe 13 protrudes into the hose exhaust communication part 17 of the gripping pipe 15. , 1
06 is inserted, and the clamp body 21 of the hose 10 is engaged with the clamp engagement concave portion 39 of the communication pipe portion 52 of the extension pipe 13 for connection.

At the time of this connection, the communication pipe section is connected to the exhaust branch pipe 106.
Since the projecting dimension of 52 is long, first, the exhaust branch pipe 106 is inserted and guided while the communication pipe section 52 is inserted and guided, so that it can be easily inserted. Then, the communication pipe portion 52 and the pair of exhaust branch pipes 106, 106
Are positioned so as to guide each other, and the terminal pin 94 of the extension tube 13 is securely held by the grip tube.
Connected to 15 terminals.

Further, since the outer diameter of the communication pipe portion 52 is formed so as to gradually decrease toward the distal end, the outer peripheral surface of the communication pipe portion 52 can be removed when the exhaust branch pipes 106 are fitted. Since a slight gap is formed between the hose suction communication portion 18 and the inner peripheral surface, a dimensional error is absorbed, and the exhaust branch pipe 106 is easily inserted. Further, in a state where the communication pipe portion 52 is fitted to the hose suction communication portion 18, the communication pipe portion 52 and the pair of exhaust branch pipes 106, 106
Compete with each other in a fitted state, and the communication pipe portion 52
And the pair of exhaust branch pipes 106, 106 are securely fitted to the hose suction communication part 18 and the hose exhaust communication part 17, respectively.
Further, a connection locking rib 53 and a connection locking projection 64 provided in a state protruding in the axial direction on the base end side of the extension tube 13 are provided with a grip tube.
Engagement with a concave portion (not shown) provided on the end surface of the connector 15 ensures connection.

The communication pipe portion 52 has a predetermined length, and its outer peripheral surface competes with the inner peripheral surface of the hose suction communication portion 18 so as to be air-tightly connected to each other. The members 126, 126 are tightly connected to the inner peripheral surface of the hose exhaust communication portion 17 and air-tightly connected to each other.

Next, the proximal end of another extension tube 13 is connected to the distal end of the extension tube 13 connected to the hose 10. This connection is made by connecting another extension pipe 13 to the distal end side of the suction main pipe 45 of the connected extension pipe 13.
The communication pipe 52 is inserted and the extension pipe 13 connected thereto is connected.
The exhaust branch pipes 106, 106 protruding from the exhaust pipe section 42 of another extension pipe 13 are inserted into the connection exhaust pipe sections 137, 137 of the mounting fitting cover 131, and the clamp body 21 of the connected extension pipe 13 is connected to another. By engaging with the clamp engagement recess 39 of the communication pipe portion 52 of the extension pipe 13,
The extension tubes 13, 13 are connected.

When connecting the extension pipes 13, 13, the projecting dimension of the communication pipe 52 is longer than that of the exhaust pipe 106. Therefore, first, the exhaust pipe 106 is inserted while the communication pipe 52 is inserted and guided. It can be easily inserted. Then, by fitting and inserting the communication pipe portion 52 and the pair of exhaust branch pipes 106, 106 at three positions, the positioning is made in a state of guiding each other, and the pin of the extension pipe 13 to which the terminal pin 94 of the extension pipe 13 is connected. It is inserted into the through hole 66 and connected to the terminal fitting 96.

Further, since the outer diameter of the communication pipe portion 52 is formed so as to gradually decrease toward the tip, the outer peripheral surface of the communication pipe portion 52 when the exhaust branch pipes 106, 106 are inserted. Since a slight gap is formed between the suction main pipe 45 and the inner peripheral surface on the distal end side, a dimensional error is absorbed, and the exhaust branch pipes 106, 106 are easily fitted. Further, in a state where the communication pipe portion 52 is fitted to the inner peripheral surface on the distal end side of the suction main pipe 45, the communication pipe portion 52 and the pair of exhaust branch pipes 106, 106 compete with each other in a fitted state. The part 52 and the pair of exhaust branch pipes 106, 106 are respectively connected to the distal end side of the suction main pipe 45 and the connected exhaust pipe parts 137, 137.
It fits securely. In addition, the connection locking rib 53 and the connection locking protrusion 64 provided in the base end side of the extension tube 13 so as to protrude in the axial direction become concave in the axial direction on the distal end side of the connected extension tube 13. Engagement with the step recess 69 allows reliable connection.

The communication pipe portion 52 has a predetermined length, and its outer peripheral surface competes with the inner peripheral surface of the suction main pipe 45 so as to be air-tightly connected. Also, seal members 126, 126 attached to the distal end portions of the exhaust branch pipes 106, 106 fit tightly on the inner peripheral surfaces of the connected exhaust pipe sections 137, 137, and the curved portions 125, 125 of the seal members 126, 126 are bent. The outer surface to be connected is connected exhaust pipe sections 137, 13
The exhaust branch pipes 107, which fit into the pipe 7, are in close contact with the inclined surfaces 117 at the tips of the exhaust pipes 107 while being elastically deformed, and communicate airtightly.

Further, the suction port 14 is connected to the connected extension pipe 13. This connection is performed by inserting the suction port body suction connection portion 31 of the connection pipe 32 of the suction port body 14 into the distal end side of the suction main pipe 45 of the extension pipe 13 and connecting and exhausting the connection fitting cover 131 of the extension pipe 13. The suction port exhaust connection section 30 of the connection pipe 32 of the suction port body 14 is fitted into the pipe sections 137, 137, and the clamp body 21 of the extension pipe 13 is engaged with the clamp engagement recess 39 of the suction port body suction connection section 31. Then, the suction port body 14 is connected to the extension pipe 13. At the time of connection of the suction port body 14, the suction port body suction connection portion 31 and the suction port body exhaust connection portion 30 compete with each other in a fitted state, so that an airtight communication fitting state can be reliably obtained. Also, the pin terminal of the suction port body 14 is inserted into the pin through hole 66 of the extension tube 13 so that the terminal fitting is formed.
Connected to 96.

By connecting the hose 10, the extension pipes 13, 13 and the suction port body 14, the suction opening 25 of the suction port body 14 is connected to the suction port body suction passage 37 of the suction port body 14 and the suction port body of the connecting pipe 32. Suction connection part 31, suction main pipes 45, 45 of extension pipes 13, 13, hose suction communication part 18 of gripping pipe 15 of hose 10, hose suction passage of hose body 11, hose suction connection part of connection pipe part 12, cleaning It communicates with the suction side of the electric blower via the suction port of the connection portion 9 of the machine body 1 and the dust collection chamber. The area from the suction opening 25 to the suction side of the electric blower is a suction air passage. In addition, the exhaust port of the electric blower includes an electric blower chamber of the cleaner body 1, a return path, an exhaust port of the connection portion 9, a hose exhaust connection portion of the connection pipe portion 12 of the hose 10, a hose exhaust passage of the hose body 11, and a hose. Extension tube connecting to 10
13 exhaust branch pipe 106, exhaust main pipe 105, exhaust branch pipe 107, extension pipe 13 connected to the extension pipe 13, exhaust branch pipe 106, exhaust main pipe 105
The exhaust branch pipe 107 communicates with the suction opening 25 of the suction opening 14 via the suction opening exhaust connection 30 of the connection pipe 32 of the suction opening 14, the suction opening exhaust passage 36, and the nozzle 34. The area from the exhaust port of the electric blower to the suction opening 25 is an exhaust air path, and constitutes a return air path.

Further, the electric motor of the suction port body 14 includes a terminal fitting 96 of the extension pipe 13 to which the pin terminal of the communication pipe 29 is connected, an extension pipe 13,
The lead wires 92, 92 connecting the terminal pins 94 and the terminal fittings 96 of the thirteen to each other, and the hose 10 connecting the terminal pins 94 of the extension tube 13 to each other.
The power is supplied via the terminal, the electric wire built in the hose 10, the connector of the connection pipe 12, and the connector of the connection 9 of the cleaner body 1.

Then, the user holds the grip tube 15 and places the suction opening body 14 on the floor to be cleaned, and
The electric blower inside and the electric motor in the suction port body 14 are appropriately driven to move the suction port body 14 on the floor surface. In addition, even if a force is applied to the connection part of the hose and the extension pipe, the connection part of the extension pipes, and the connection part of the extension pipe and the suction port body in the direction bent in the axial direction of the suction air path, As shown in FIGS. 6 and 7, for example, the connecting portions are fitted at three places of the communication pipe portion 52 and the pair of exhaust branch pipes 106, 106, so that the forces are dispersed. Damage to the connection can be prevented.

By driving the electric blower, the suction opening 14
Dust sucked together with air from the suction opening of the cleaner body is trapped in the dust collection chamber of the cleaner body 1 through the suction air passage. Furthermore, the air from which dust has been removed is sucked into an electric blower,
It is discharged as exhaust air from the exhaust port of the electric blower. Then, the discharged exhaust air is blown out toward the floor from the nozzle portion 34 of the suction port body 14 through the exhaust air path, and the dust on the floor is lifted. Then, it is sucked again from the suction air path together with the dust and returns.

When the exhaust air flows through the exhaust air path, the exhaust air path is at a positive pressure with respect to the atmospheric pressure.
The contact portion 125 of the seal member 126 is deformed so as to expand toward the outer surface side by the airflow of the exhaust air, and the inclined surface 117 of the exhaust branch pipe 106 is formed.
And it comes into a state of being in close contact with the inner peripheral surface of the connection exhaust pipe portion 137.

As described above, since the sealing members 126 are provided at the distal ends of the exhaust branch pipes 106, 106, which project from the exhaust pipe section 42, and are fitted and connected to other connection pipes, the fitting state of the exhaust branch pipe 106 is established. However, even when airtight taper fitting is not possible due to dimensional errors and smoothness, the airtightness of the exhaust air path is reliably obtained, and exhaust air leaks from the exhaust branch pipe 106, which has a positive pressure with respect to the atmospheric pressure, and the floor surface is It is possible to reliably prevent the dust and the like from being blown up, and to clean well. In the case of the suction air passage, the cylindrical communication pipe 52 has a larger diameter than the exhaust branch pipe 106 and can have a sufficient fitting length without being branched.
Is sufficient to obtain airtightness even with taper fitting, and even if sufficient airtightness is not obtained, it will be negative pressure with respect to atmospheric pressure, so airflow leaks from the connection part and blows out dust There is no.

Further, since the sealing member 126 is provided on the exhaust branch pipe 106 having a diameter smaller than that of the communication pipe section 52 of the suction air passage at the connection portion, a dimensional error or the like is likely to occur, and even a small error may cause a large taper fitting. Exhaust branch pipe 10 whose airtightness is affected
The airtightness of the connection state of No. 6 can be reliably ensured, and the manufacturability can be improved.

Further, the exhaust branch pipe of another extension pipe 13 to be connected
Since the sealing member 126 is provided with a contact portion 125 that is in close contact with the end surface of the 107, exhaust is performed to prevent the size, appearance, and gripping properties from being reduced and to assemble the suction pipe 41 and the exhaust pipe 42 integrally. Blow molding is performed by providing a mounting gap 116 at the end of the pipe portion 42 and branching the exhaust branch pipe 106 107,
Even in the exhaust pipe section 42 where the smoothness of the inner surface and the variation in the inner diameter are likely to occur and the taper fitting is not possible, the contact section 125 which maintains the airtightness by abutting on the end face of the exhaust branch pipe 107,
By using the attachment fitting cover 131, a connection state in which reliable airtightness can be obtained in both the air path direction and the radial direction of the exhaust air path with a simple structure can be easily obtained.

Further, since the contact portion 125 is formed into a shape in which the distal end side is curved inward and becomes a free end and has a structure in which the contact portion is swollen and adhered by an air current, a reliable airtightness can be obtained with a simple structure.

Then, the suction pipe 41 and the exhaust pipe 42
It is a structure with two air passages, designed for preventing the size, appearance and gripping properties from being reduced, and assembling the suction pipe 41 and the exhaust pipe 42 integrally.
Due to the mounting gap 116 generated between the exhaust branch pipes 107, 107 for screwing 1, the width between the side edges on one end side of the mounting fitting cover 131 is narrow so that the outer surface becomes a series and the side edge on the other end side is narrow. The attachment fitting cover 131 is formed so that the width of the attachment fitting cover 131 is increased. Further, the end of the exhaust branch pipes 107, 107 of the exhaust pipe section 42 to which the maximum width dimension is large and the exhaust branch pipes 106, 106 of the suction pipe 14 and the other extension pipe 13 communicate with each other. The connecting exhaust pipe portions 137, 137 for connecting the suction port body exhaust connection portion 30 and the exhaust branch pipes 106, 106 to communicate without reducing the air passage area are integrated with the inside of the mounting fitting cover 131. To be provided. Then, with the distal end portion of the exhaust branch pipe 107 fitted and held in the connecting exhaust pipe section 137, the exhaust branch pipe extends along the axial direction of the exhaust branch pipe 107 between the outer surface side of the exhaust branch pipe 107 and the inner surface of the mounting fitting cover 131. The attachment fitting cover 131 is formed so as to form a moving gap 139 where the attachment fitting cover 131 and the attachment fitting cover 131 can relatively move.

For this reason, after the distal ends of the exhaust branch pipes 107 are inserted into the inside of the fitting cover 131, the connecting exhaust pipe section
137, 137, and lock the exhaust main pipe 105 to the exhaust branch pipe.
The exhaust pipes 137 are rotated around the end edges of the connected exhaust pipes 137, 137 where the 107 is locked, and the entire exhaust branch pipes 107, 107 are inserted into the inside of the fitting cover 131, and the exhaust pipe 42 is moved in the air path direction. By relatively moving toward a certain mounting fitting cover 131, the narrow edge of the mounting fitting cover 131 becomes narrower.
, 107 can be easily assembled by fitting the exhaust branch pipes 107, 107 to the connecting exhaust pipe sections 137, 137.
107 can be prevented from being damaged, and has a structure having two air passages, a suction pipe 41 and an exhaust pipe 42. An attachment fitting cover 131 for design for integrally assembling the pipe portion 42 can be easily attached by covering the exhaust branch pipes 107, 107, and productivity can be improved.

Further, for example, at the time of cleaning, a load is applied by the force of pressing the suction port body 14 against the floor surface so that the extension pipe 13 is curved in a direction in which the lower exhaust pipe section 42 extends, and the screw is fixed. Mounting cover 130 and mounting mating cover 131
The distance between them increases, and the connected exhaust pipes 137, 137
The exhaust branch pipes 107, 107 are pulled out of
139 prevents the outer surfaces of the exhaust branch pipes 107, 107 from being pressed against the narrow side edge of the mounting fitting cover 131 and being damaged. Note that the exhaust pipe 42 does not come off because the outer surfaces of the exhaust pipes 107 are in the fitted state even when they contact the narrower edge of the fitting cover 131.

The extension pipe 13 has two air passages, a suction pipe 41 and an exhaust pipe 42. And the suction pipe part 41 is
Since dust flows together with air, a cylindrical shape is preferable in consideration of air resistance and the like. However, if both the suction pipe portion 41 and the exhaust pipe portion 42 are formed in a cylindrical shape, the width dimension increases in the juxtaposed direction, and the appearance and the gripping property decrease as the size increases. It must be formed into a shape. Therefore, the extension pipe 13
As shown in FIGS. 6 and 7, the cross-sectional shape of the overall outer surface is substantially triangular as shown in FIGS.

At the end of the extension tube 13, it is necessary to dispose a clamp 21 for holding the connection, and a clamp cover 81 for attaching and holding the clamp 21 is designed and attached in series. It is necessary to form the cover 47 in a shape that can be obtained. It is necessary to form the cover portion 46 on the opposite base end side in a shape corresponding to the clamp cover 81 so that the decorative cover 60 can be attached in a series of designs.

For these reasons, the upper and lower edges of the covers 46, 47 are separated from the outer surface of the suction main pipe 45,
41 has a substantially C-shaped cross section which is curved so that the distance between the lower edges on the side where the exhaust pipe portion 42 is located is larger than the distance between the upper edges on the side opposite to the side where the exhaust pipe portion 42 is located. It is formed.

Further, since the cover portions 46 and 47 are formed so that the lower edge side is expanded, the suction main pipe 45 is held by only the portion consisting of the series of the suction main pipe 45 and the cover end 51. In this state, the lower edge portion that is separated from the outer peripheral surface of the suction main pipe 45 is easily damaged by an external load.

Since the reinforcing ribs 48 for absorbing and dispersing the force against the load from the outside are provided, the structure has two air paths of the suction pipe 41 and the exhaust pipe 42.
Design cover portions 46 and 47 for preventing an increase in size, a reduction in appearance, and a reduction in gripping characteristics can be firmly formed integrally with the suction pipe portion 41. Can be prevented from being damaged by external loads such as collision with the
Structural strength can be improved.

Further, when forming the suction pipe portion 41 by a simple molding method using a simple mold structure, it is necessary to form a surplus portion that fills a portion that becomes a recess in the facing direction of the mold. The rib 48 is provided between the curved inner surfaces of the cover portions 46 and 47 facing the suction main pipe 45 and the cover portions 46 and 47 opposite to the exhaust pipe section 42 in a radial direction passing through the central axis of the suction main pipe 45. Since it is formed so as to bridge between the position of the outer peripheral surface of the suction main pipe 45 displaced to the upper edge side on the narrow side, the cover portion 46, As compared with the case where the inner tube 47 is formed in a cross-linked shape, the excess wall portion can be reduced, a simple mold structure can be formed by an easy method, and the lightweight extension tube 13 can be easily formed.

Further, a pair of exhaust branch pipes that branch the lower exhaust pipe portion 42 into a flat exhaust main pipe 105 in a bifurcated manner.
106, 106, 107, 107, the extension pipe 13
In addition to improving the appearance without increasing the size, the cleaning workability is improved, and the rollability is improved. It can be stably mounted on the floor surface, etc., and handleability can be improved.

Further, in order to provide a pair of exhaust branch pipes 106, 106, 107, 107 branching from the exhaust main pipe 105 in a bifurcated manner, a mounting gap for integrally assembling the suction pipe section 41 and the exhaust pipe section 42 is provided. 116 is formed, and no separate member is required to form an integrated structure with another member without increasing the size.
In addition to being able to improve manufacturability, the connection part is connected to the communication pipe part 52 of the suction pipe part 41 at three places,
Damage such as breakage by dispersing stress in a bending direction can be prevented.

Further, since the exhaust branch pipes 106 are branched from the exhaust main pipe 105, the exhaust branch pipes 106, 106, 107, 107 can be formed in a cylindrical shape, and a fitting state in which the exhaust branch pipes can easily communicate in an airtight state can be obtained.

Then, in order to attach the decorative cover 60 and the clamp cover 81 for design, the reinforcing rib 48 is provided with a mounting engaging recess 70 for engaging the mounting engaging pieces 62 of the decorative cover 60 and the clamp cover 81. For example, for the cover part
In the case where it is provided on the inner surface side of 46, 47, a concave portion will be formed in the direction opposite to the mold in molding with a mold having a simple structure, and molding using a mold with a simple structure will not be possible. Since the mounting engagement recess 70 penetrates the reinforcing rib 48 that can be molded with a simple structure, it can be easily formed.

Further, the structure having the two air paths of the suction pipe 41 and the exhaust pipe 42 prevents the suction pipe 41 and the exhaust pipe 42 from being enlarged, preventing the appearance from being deteriorated and the grip from being lowered. For design to assemble integrally, mounting mating cover 131
Due to the mounting gap 116 generated between the exhaust branch pipes 107, 107 for screwing the mounting cover 131, the width between the side edges on one end side of the mounting fitting cover 131 is narrow and the space between the side edges on the other end side is continuous. The attachment fitting cover 131 is formed to be wide. Also,
The maximum width dimension is large and the suction port body exhaust connection 30 of the suction port body 14
And the other end of the exhaust pipes 107 of the exhaust pipe section 42 to which the exhaust pipes 106 of the other extension pipe 13 are connected and connected to each other to form the suction port exhaust connection section 30 and the exhaust pipes 106, 106. However, connecting exhaust pipe portions 137, 137 for making communication connection without reducing the air passage area are integrally provided inside the fitting cover 131. Then, with the distal end portion of the exhaust branch pipe 107 fitted and held in the connecting exhaust pipe section 137, the exhaust branch pipe extends along the axial direction of the exhaust branch pipe 107 between the outer surface side of the exhaust branch pipe 107 and the inner surface of the mounting fitting cover 131. The attachment fitting cover 131 is formed so as to form a moving gap 139 where the attachment fitting cover 131 and the attachment fitting cover 131 can relatively move.

For this reason, after the distal ends of the exhaust branch pipes 107 are inserted into the inside of the fitting cover 131, the connecting exhaust pipe section
137, 137, and lock the exhaust main pipe 105 to the exhaust branch pipe.
The exhaust pipes 137 are rotated around the end edges of the connected exhaust pipes 137, 137 where the 107 is locked, and the entire exhaust branch pipes 107, 107 are inserted into the inside of the fitting cover 131, and the exhaust pipe 42 is moved in the air path direction. By relatively moving toward a certain mounting fitting cover 131, the narrow edge of the mounting fitting cover 131 becomes narrower.
, 107 can be easily assembled by fitting the exhaust branch pipes 107, 107 to the connecting exhaust pipe sections 137, 137.
107 can be prevented from being damaged, and has a structure having two air passages, a suction pipe 41 and an exhaust pipe 42. An attachment fitting cover 131 for design for integrally assembling the pipe portion 42 can be easily attached by covering the exhaust branch pipes 107, 107, and productivity can be improved.

Next, another embodiment of the present invention will be described with reference to FIGS.

The embodiment shown in FIGS. 21 and 22 differs from the embodiment shown in FIGS.
A seal member 125 provided at the tip of the exhaust branch pipe 107 is provided in a connection exhaust pipe section 137 which is the female side of the fitting.

That is, the seal member 150 has a substantially cylindrical shape and a fitting body portion 151 whose outer peripheral surface is fitted in close contact with the inner peripheral surface of the exhaust branch pipe 106 107. At the approximate center of the outer peripheral surface of the fitting body portion 151, there is provided a contact portion 152, which is a cylindrical protruding flange and whose outer peripheral surface is closely fitted to the inner peripheral surface of the connecting exhaust pipe portion 137. Have. An abutting surface 153 is provided on the axial end surface of the abutting portion 152 in close contact with the end surface of the exhaust branch pipe 106 107. Furthermore, the fitting body part 151
At both end edges, fitting portions 154 are formed so as to be elastically deformable as contact portions having a smaller diameter toward the front end. Note that the outer peripheral surface of the insertion portion 154 is inclined such that its diameter is gradually reduced toward the distal end.
155. Then, the sealing member 150 is
As shown in FIG.
One end of the fitting body 151 is disposed in close contact with the tip of the exhaust branch pipe 106. In this state, the inclined surface 155 of the fitting portion 154 is not in close contact with the inner peripheral surface of the exhaust branch pipe 107. Then, at the tip of the exhaust branch pipe 107,
No seal member 126 is provided.

When connecting to another connection pipe such as another extension pipe 13, the fitting fitting cover 131 of the connected extension pipe 13 is used.
The exhaust pipe section 42 of another extension pipe 13 is connected to the connected exhaust pipe sections 137
The exhaust branch pipes 106, 106 protruding from are inserted. At the time of this fitting operation, the fitting portion 154 is guided by the inclined surface 155 at the tip of the exhaust branch pipe 106 to be fitted and fitted into the end of the exhaust branch pipe 106, and the end face of the exhaust branch pipe 106 is brought into contact with the fitting section. Contact surface of part 152
The fitting operation is completed in a state of contact with 153. In this state, the clamp body 21 of the connected extension pipe 13 is
Of the extension pipe 1
3, 13 are connected.

According to the embodiment shown in FIG. 21 and FIG. 22, the exhaust branch 107 of the connecting pipe such as another extension pipe 13 is replaced with the exhaust branch 107 which is hard to obtain the smoothness of the inner surface by blow molding and the inner diameter of which is easily varied. In order to provide a seal member 150 which is closely fitted and inserted into the connection exhaust pipe portion 137 of the mounting fitting cover 131 for coupling with the exhaust pipe 107 and is closely fitted and inserted into the end of the exhaust branch pipe 107. Also, airtight connection can be easily achieved with a simple configuration even in the blow-molded exhaust pipe section 42.

Since the insertion portion having the inclined surface 155 to be inserted while being guided at the tip of the exhaust branch pipe 106 to be inserted into the seal member 150 is provided. The exhaust branch pipes 106 and 107 can be airtightly connected to each other.

The sealing member 150 is connected to the connecting exhaust pipe portion 137.
Since it is disposed inside without being exposed to the outside, for example, there is no possibility that a cleaning worker may accidentally remove it, and it is possible to reliably maintain a state where the cleaning worker is disposed at a predetermined position.

In each of the above embodiments, the exhaust branch pipe of the exhaust pipe section 42 used in the canister type vacuum cleaner is described.
Although the seal members 126 and 150 are attached to 106 and 107, the seal members 126 and 150 may be provided in the communication pipe 52 of the suction pipe 41 and the suction fitting portion 45a at the end of the suction main pipe 45.

In the above description, the reinforcing ribs 48 are provided on the cover portions 46 and 47 of the extension pipe 13. However, the hose 10 having two air passages has been described.
The connecting pipes 12, the gripping pipe 15, and the communication pipe 29 of the suction opening 14 may be used as connecting pipes, and the cover parts 46, 47 may be integrally formed by the reinforcing ribs 48.

Further, the vacuum cleaner of any structure, such as an upright type or a handy type having no hose 10, or a structure in which the suction port 14 is directly connected to the connecting portion 9 of the cleaner body 1, is applicable. Available. Further, the present invention is not limited to the vacuum cleaner and can be applied to any connecting pipe having two air paths and connecting two places.

Further, although the description has been made with the reinforcement ribs 48 provided on the suction pipe section 41, it may be provided on the exhaust pipe section 42 side.

The decorative cover 60 and the clamp cover 81 do not need to be attached to the reinforcing ribs 48.
Alternatively, an attachment fitting cover 131 may be attached.

[0102]

According to the first aspect of the present invention, since the seal member is provided at the end of the exhaust pipe, which is in close contact with the separate exhaust pipe to be connected, the airtight seal is provided between the separate exhaust pipe and the seal member. To prevent dust from being blown up due to airflow leakage from the exhaust pipe.

According to the connecting pipe according to the second aspect, the diameter of the suction connecting portion inserted into the suction pipe separate from the suction pipe and the exhaust connection portion inserted into the exhaust pipe separate from the exhaust pipe. In order to provide a seal member at one end of the smaller
For example, the connecting part where the diameter is small and cannot be lengthened to maintain the strength is sealed by a sealing member, and the connecting part where the strength is maintained even if the diameter is large and long is inserted into a separate pipe to be inserted. , The airtightness can be maintained.

According to the connection pipe of the third aspect, the connection pipe of the second aspect is provided.
In addition to the effects of the connecting pipe described above, the seal member has a suction fitting part of a suction pipe into which a separate suction connecting part is fitted and an exhaust fitting part of an exhaust pipe into which a separate exhaust connecting part is fitted. In order to provide an inclined surface with a small diameter inclined toward the tip on the outer peripheral surface of the end portion which is inserted into and adheres to at least one of the inner surfaces, airtightness of the connected state is ensured by being guided by the inclined surface at the time of connection The sealing member that can maintain the airtightness and the airtightness of the connection state is disposed in the suction fitting part and the exhaust fitting part that are not exposed to the outside, so that there is no possibility that the cleaning worker may accidentally remove it, Can be maintained in a predetermined position.

According to the connecting pipe of the fourth aspect, the first aspect of the present invention is the first aspect.
In addition to the effects of the connection pipe described in any one of the above-described items 3, in order to provide the sealing member with a close contact portion which is deformed and adhered to by the airflow flowing through the suction pipe and the exhaust pipe, for example, a reliable airtightness in a use state of the vacuum cleaner. Sex can be obtained.

According to the connecting pipe of claim 5, claim 1 is provided.
In addition to the effects of the connecting pipe according to any one of (4) to (4), since the sealing member is provided with a contact portion that contacts one end face of the separate suction pipe and exhaust pipe to be connected, the suction pipe and the suction pipe in the connected state are provided. Airtightness in both the air path direction and the radial direction of the exhaust pipe can be reliably obtained with a simple structure.

According to the vacuum cleaner of the sixth aspect, the structure provided with the suction pipe and the exhaust pipe can prevent the appearance from being deteriorated, and can achieve a good connection with a simple structure. Since the connecting pipe is provided, it is possible to improve the handling property and the cleaning property, and to reduce the cost by improving the manufacturability.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of an exhaust pipe section illustrating a state of connecting extension pipes according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the extension tube.

FIG. 3 is a side sectional view of the extension pipe with a part cut away.

FIG. 4 is a side view showing the extension tube.

FIG. 5 is a plan view showing the extension pipe.

FIG. 6 is an end view of a base end side showing the extension tube.

FIG. 7 is an end view showing a distal end side of the extension tube.

FIG. 8 is a sectional view taken along a radial direction showing the extension pipe.

FIG. 9 is a side view showing the suction pipe section.

FIG. 10 is a plan view showing the suction pipe section.

FIG. 11 is a side sectional view showing the suction pipe section.

FIG. 12 is a bottom view showing the suction pipe section.

FIG. 13 is a partially cut-away bottom view showing a suction pipe portion provided with the lead wire.

FIG. 14 is a cross-sectional view along the radial direction showing the suction pipe portion to which the decorative cover of the extension pipe is attached, in the same manner.

FIG. 15 is a partially cutaway plan view showing the exhaust pipe section.

FIG. 16 is a side cross-sectional view showing the exhaust pipe section.

FIG. 17 is a partially cutaway plan view showing an exhaust branch pipe for explaining a connection state between the extension pipes.

FIG. 18 is a perspective view showing the electric vacuum cleaner.

FIG. 19 is a partially cut-away sectional view showing a connection portion between the hose and the extension pipe.

FIG. 20 is a partially cutaway sectional view showing a connection portion between the extension pipe and the suction port body of the above.

FIG. 21 is a partially cutaway plan view showing an exhaust pipe section for explaining a state of connecting extension pipes in another embodiment of the present invention.

FIG. 22 is a partially cutaway plan view showing an exhaust pipe section for explaining a connection state between the extension pipes.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 10 Hose which is a connection pipe 13 Extension pipe as a connection pipe 14 Suction mouth body as a connection pipe 41 Suction pipe part as a suction pipe 42 Exhaust pipe part as an exhaust pipe 45a Suction fitting part 52 Suction connection part Communication pipe section 106 exhaust exhaust pipe 125 serving as an exhaust connection section tight contact sections 126 and 150 also serving as contact sections sealing member 137 connecting exhaust pipe section 152 serving as an exhaust fitting section contact section 154 fitting as a close contact section Insert 155 Slope

Claims (6)

[Claims] 1. A suction pipe communicating with a suction side of an electric blower of a cleaner body, an exhaust pipe communicating with an exhaust side of the electric blower, and a separate exhaust provided and connected to an end of the exhaust pipe. A connection pipe comprising: a sealing member which is in close contact with the pipe. 2. A suction pipe communicating with the suction side of the electric blower of the cleaner body, a cylindrical suction connection part provided at an end of the suction pipe and inserted into a separate suction pipe connected to the suction pipe, An exhaust pipe communicating with the exhaust side of the electric blower, a cylindrical exhaust connection part having a diameter different from that of the suction connection part inserted into a separate exhaust pipe provided and connected to an end of the exhaust pipe, A connection pipe comprising: a seal member provided at one of the distal ends of the suction connection portion and the exhaust connection portion having a smaller diameter. 3. The suction pipe has a suction fitting portion into which a separate suction connection portion to be connected is inserted, and the exhaust pipe has an exhaust fitting into which a separate exhaust connection portion to be connected is inserted. A seal member is inserted into at least one of the inner surface of the suction fitting portion and the exhaust fitting portion, and ends of the separate suction connection portion and the separate exhaust connection portion. 3. The connecting pipe according to claim 2, wherein the outer peripheral surface of the end portion which is fitted into and adhered to the portion has an inclined surface which inclines with a small diameter toward the tip. 4. The connection pipe according to claim 1, wherein the seal member has a contact portion which is deformed and adhered by an airflow flowing through the suction pipe and the exhaust pipe. 5. The seal member according to claim 1, wherein the seal member includes a contact portion that contacts one of end faces of the separate suction pipe and the exhaust pipe to be connected. Connecting pipe. 6. An electric vacuum cleaner comprising: a cleaner main body; and the connection pipe according to claim 1 connected to the cleaner main body.