EP2090212B1 - Gripping device on a vacuum hose - Google Patents

Description

TECHNICAL AREA

The invention relates to a handle assembly on a suction hose equipped for spray extraction. In the method known as spray extraction, a liquid cleaning agent is sprayed into the carpet pile by means of a spray extraction apparatus under pressure and sucked off in a single operation by means of a suction device via a suction hose. In a similar method, a powdered cleaning agent is blown into the carpet pile and sucked off in a single operation by means of a suction device via a suction hose. Therefore, if a liquid line is mentioned below, this designation should also include a line through which a cleaning powder is blown.

STATE OF THE ART

A handle assembly on a suction hose is ZB off US-A-5459901 known.

In the case of the equipment used in this case, a liquid line is guided inside through the suction hose, which is provided at its handling end with a handle assembly which is mounted relative to the suction hose limited rotatably mounted on the suction hose. Here, the liquid line at the point of transition from the suction hose to the handle assembly according to the prior art out out and usually attached to the outside of the handle assembly. This design has the disadvantage that the liquid line in the region of the handle assembly is unprotected and can get caught in use.

It has already been proposed to guide the fluid line inside through a handle part of the handle assembly. The DE 692 31 070 T2 , the WO 2004/073478 A1 and the US 5,459,901 A show various handle assemblies in which the liquid line runs inside. Here, however, the desired rotation of the handle assembly relative to the suction hose is considerably limited.

TASK

The invention has for its object to provide a handle assembly on a suction hose equipped for spray extraction, in which, despite the guided through a handle suction line the possible angle of rotation between the suction hose and the handle assembly is so large that a comfortable handling in the spray extraction is ensured.

PRESENTATION OF THE INVENTION

This object is achieved by the features of claim 1. Advantageous or expedient developments of the invention are specified in the subclaims and will also be described in more detail below.

The invention comprises according to claim 1, a handle assembly on a suction hose equipped for spray extraction, with a non-rotatably mounted at one end of the suction hose against the suction hose inner sleeve and with a handle tube, in which the inner sleeve inserted and sealed therein rotatably but fixed axially immovable, wherein a flexible fluid conduit out of the suction hose and the inner sleeve out in a substantially radial direction through a wall opening of the handle tube outwardly into a cavity of a handle portion which is connected to the hose side end of the handle tube, wherein the liquid line set to form a length supply loop in the handle part is, being on the outer circumference of the Inner sleeve, a receiving space is provided which is opposite to the wall opening of the handle tube and in which in relative rotations between the suction hose and the handle tube fluid line from the length supply loop is displaceable, and wherein the angle of rotation between the suction hose and the handle tube limited in accordance with the length of the liquid line in the length supply loop is.

The handle assembly according to the invention allows a rotation angle between the suction hose and the handle assembly up to about 180 ° and larger, which ensures a comfortable handling of the arrangement in the spray extraction. It has been found that a length supply loop formed from the flexible fluid line itself and arranged in the manner indicated allows the specified angle of rotation. In this case, the length of the liquid line located in the length supply loop forms the limit of the angle of rotation between the suction hose and the handle tube. However, this rotation angle can preferably be limited by stops according to claim 2.

The receiving space on the circumference of the inner sleeve takes on relative rotation between the suction hose and handle assembly, the flexible liquid line kinked. The liquid line is also returned without kinks in the rest position of the length supply loop when handle assembly and suction hose have reached their output relative position again. The effective in both directions stops prevent overstretching or stretching of the liquid line, which assumes a bent position in the stop positions, which favors the return to the rest position of the length supply loop. In this case, the liquid line is supported at its fixing point in the handle part.

In continuation of the inventive concept according to claim 3, the handle part of two half-shells formed on the one hand surround the handle tube at its suction hose end partially and on the other hand connected to the other end of the handle part, wherein the two half shells form a continuous through the handle cavity, through which the liquid line is guided and fixed in the vicinity of the handle tube by a line holder. Handle tube and handle form here after assembly a one-piece handle assembly which is limited rotatable relative to the suction hose connected thereto. In this case, according to claim 4, the handle tube, which is preferably cylindrical in the region of the inserted inner sleeve, subsequently formed arcuate, for example as a 90 ° arc. The handle tube may also be conical in the region of the inner sleeve.

Preferably, the wall opening of the handle tube is formed in accordance with claim 5 as about half the circumference of the handle tube continuous slot-shaped recess whose end faces are provided in the Ausgangsrelativlage of handle assembly and suction approximately diametrically opposite.

The receiving space for the flexible fluid line on the outer circumference of the inner sleeve is expediently designed according to claim 6 so that it is bounded in the axial direction by two spaced apart flange-like annular projections of the inner sleeve and in the radial directions outside by the inner wall surface of the handle tube and inside by the outer peripheral surface of the inner sleeve ,

The rotationally fixed attachment of the inner sleeve to the Saugschlauchende takes place in a hose, which in per se known Way outside the manner of an external thread helical wave crests and wave troughs, according to claim 7 expedient so that the one annular projection of the pushed onto the inner sleeve suction hose is pressed by a screwed onto the hose threaded sleeve which engages over the annular projection and which a radially outwardly facing Having stop element. The threaded sleeve in this case has an internally threaded portion, which is adapted in dimensions and pitch to the outer thread formed by the wave crests and wave troughs of the hose.

In a further embodiment of the handle assembly according to the invention is, as stated in claim 8, the stop element of the threaded sleeve within the wall opening of the handle tube, wherein the two end surfaces of the wall opening are the rotational angle between the suction hose and the handle tube limiting abutment surfaces for the stop element.

Suitably, the liquid line of the suction hose according to claim 9 before entering the inner sleeve in a tube which extends into the wall opening of the handle tube and is inserted into a receiving channel of the inner sleeve, which extends in the axial direction and outwardly open in the wall of the inner sleeve is formed. Instead of carrying out the liquid line through a pipe, the liquid line can also be glued or welded directly to the inner wall of the Saugschläuchs.

For the seal between the inner sleeve and the relatively rotatable rotatable handle tube according to claim 10 is provided that the inner sleeve has at its end remote from the suction hose an annular step on which a lip seal is received, abuts the sealing lip of the inner wall surface of the handle tube.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1

eine Seitenansicht der Griffanordnung mit abgebrochen dargestelltem Staubsaugerschlauch,

Fig. 2

die Anordnung gemäß Fig. 1, jedoch in Längsschnittdarstellung,

Fig. 3

eine gegenüber Fig. 2 vergrößert dargestellte Längsschnitteinzelheit der Anordnung,

Fig. 4

den Querschnitt durch die Anordnung entsprechend der Schnittverlaufslinie IV-IV in Fig. 2, aus welchem die Ausgangsrelativlage der Innenmuffe zum Griffrohr ersichtlich ist,

Fig. 5

einen Querschnitt entsprechend der Fig. 4, jedoch mit einer gegenüber dem Griffrohr um etwa 90° in die eine Drehrichtung bis zur Anschlagposition gedrehten Innenmuffe, und

Fig. 6

einen Querschnitt entsprechend Fig. 4, jedoch mit einer gegenüber dem Griffrohr um etwa 90° in die andere Drehrichtung bis zur Anschlagposition gedrehten Innenmuffe.

Further details of the invention will be explained in more detail with reference to a preferred embodiment illustrative drawings. It shows:

Fig. 1

a side view of the handle assembly with broken illustrated vacuum cleaner hose,

Fig. 2

the arrangement according to Fig. 1 , but in longitudinal section,

Fig. 3

one opposite Fig. 2 magnified longitudinal cross-sectional detail of the arrangement,

Fig. 4

the cross section through the arrangement according to the section line IV-IV in Fig. 2 , from which the starting relative position of the inner sleeve to the handle tube can be seen,

Fig. 5

a cross section corresponding to the Fig. 4 , but with an opposite of the handle tube by about 90 ° in the one direction of rotation turned to the stop position inner sleeve, and

Fig. 6

a cross section accordingly Fig. 4 , but with an inner sleeve rotated by about 90 ° with respect to the handle tube in the other direction of rotation up to the stop position.

The drawings are illustrated to illustrate details and functional relationships at different scales.

DETAILED DESCRIPTION OF THE EMBODIMENT

From the handle assembly are off Fig. 1 From the outside, only a few parts to recognize, namely the handle tube 1, the handle part 2, the suction hose 3 and a subsequent to the handle assembly cage-type bend protection 4 for the suction 3. The handle tube 1 is arcuately designed as a handle and describes an arc of about 90 ° , The handle part 2 is also formed as an arc, but the arc shape of the handle tube 1 opposite, so that between the handle tube 1 and the handle part 2, a passage opening 5 is formed. The handle part 2 is connected on the one hand to the hose-side end of the handle tube 1 and on the other hand to the other end of the handle tube 1, which in a nozzle 6 for a nozzle (not shown) or a connecting pipe (not shown) passes.

As in particular from the Fig. 2 and 3 As can be seen, the handle tube 1 widens at a conical transition 7 to a cylindrical end portion 8 of larger diameter, in which the inner sleeve 9 is inserted. In the end portion 8 of the handle tube 1, a wall opening 10 is provided which is formed as about about half the circumference of the handle tube 1 continuous wide slot-shaped recess. The end surfaces 11 and 12 ( Fig. 3 . 4 ) of the wall opening 10 are arranged approximately diametrically opposite one another in the starting relative position of the handle arrangement and the suction hose 3 ( Fig. 4 ).

On the outer circumference of the inner sleeve 9, a receiving space 13 is provided, which is opposite to the wall opening 10 and in the axial direction of two spaced apart flange-like annular projections 14 and 15 and in the radial directions outside through the inner wall surface 16 of the cylindrical end portion 8 of the handle tube 1 and inside through the Outer peripheral surface 17 of the Inner sleeve 9 is limited. The function of the receiving space 13 will be explained in more detail below.

The suction hose 3 has in the usual manner in the manner of an external thread helically extending and alternating wave peaks 18 and troughs 19. The suction hose 3 is pushed onto the inner sleeve 9 until it rests against the annular projection 14 and is pressed by a screwed onto the suction hose 3 threaded sleeve 20 to the annular projection 14, whereby the suction hose 3 is fixed non-rotatably on the inner sleeve 9, so that these together with the suction hose 3 can rotate relative to the handle tube 1.
The threaded sleeve 20 has for example a complete internal thread 21, which has the slope of the formed from the wave crests 18 and troughs 19 external thread on the suction hose 3 and in Fig. 3 is shown in section.

The threaded sleeve 20 engages over the annular projection 14 and has on its outer circumferential surface on a radially outwardly facing stop member 22, which is located within the wall opening 10, such as Fig. 3 clarified. The two end surfaces 11 and 12 of the wall opening 10 form the possible angle of rotation between the inner sleeve 9 and the handle tube 1 limiting abutment surfaces for the stop element 22nd

The handle part 2 is formed from two half-shells 23 and 24, which partially surround the handle tube 1 and its cylindrical end portion 8, like the Fig. 2 to 6 clarify. The grips 23, 24 are also connected to the other end of the handle part 1 ( Fig. 1, 2 ), are fixedly connected to each other at attachment points 25 to 27 and form a through the handle part 2 continuous cavity 28th

As Fig. 3 illustrates the two half-shells 23, 24, of which from this figure, only the half-shell 24 can be seen, with an annular step 29 of the end face 30 of the cylindrical end portion 8 of the handle tube 1 at. The anti-buckling 4 is located with its inner end 31 which engages over the threaded sleeve 20, the end face 30 at. In the bend protection 4 is a circumferential groove 32 in which a circumferential on both half shells 23, 24 befindlicher projection 33 engages. A locking ring 34 is pushed onto the hose-side end of the two half-shells 23, 24 and locked with a radially inwardly directed projection 35 with an associated groove 36 on the periphery of the bend protection 4.

Due to this design and arrangement of the interlocking parts of the handle assembly, the inner sleeve 9, the suction hose 3, the bend protection 4 and the threaded sleeve 20 are rotatably arranged together relative to the handle tube 1 with its cylindrical end portion 8, the handle part 2 and the locking ring 34. However, the inner sleeve 9 with the suction hose 3, the bend protection 4 and the threaded sleeve 20 are fixed axially immovable relative to the handle tube 1, the handle part 2 and the locking ring 34. The anti-buckling 4 may deviate from the drawn and described above arrangement also be firmly connected to the handle tube.

Through the suction hose 3, a liquid line 37, designed as elastic plastic hose, out, which are located before entry into the inner sleeve 9 in a tube 38 which extends into the wall opening 10 of the cylindrical end portion 8 of the handle tube 1, in particular from Fig. 3 evident. The tube 38 is inserted into a receiving channel 39 of the inner sleeve 9, which extends in the axial direction and is formed radially outwardly open in the wall of the inner sleeve 9.

The liquid line 37 is formed from the suction hose 3 and the inner sleeve 9, more precisely from the inserted in the receiving channel 39 of the inner sleeve 9 tube 38, approximately radially through the wall opening 10 of the handle tube 1, more precisely, the cylindrical end portion 8 of the handle tube 1, passed outwardly into the cavity 28 of the handle portion 2 and is fixed there to form an approximately S-shaped length supply loop 40 by a conductor holder 41 which is mounted between the attachment points 25 and 26.

During relative rotation between the suction hose 3 including the rotatably connected parts relative to the handle tube 1 including the associated parts, the liquid line 37 is partially displaced from the length supply loop 40 in the receiving space 13, as in the Fig. 5 and 6 is shown. These figures also illustrate the maximum possible rotation angle in both directions of rotation, in which the stop element 22 either of the end face 11 (FIG. Fig. 6 ) or the end surface 12 (FIG. Fig. 5 ) of the wall opening 10 is present.

The liquid line 37 is guided after the line holder 41 through the cavity 28 of the handle part 2, as seen from Fig. 2 shows, and at the end of the cavity 28 in a suitable manner od with a spray nozzle. Like. Connected.

How most obvious Fig. 3 shows the inner sleeve 9 at its end remote from the suction hose 3 an annular step 44. The annular step 44 receives a lip seal 45, the sealing lip 46 of the inner wall surface 16 of the cylindrical end portion 8 of the handle tube 1 is applied and thus ensures a seal of the vacuum chamber with respect to the outside atmosphere.

The handle tube 1, the handle part 2, the anti-kink 4 and the threaded sleeve 20 may be made of thermoplastics suitable strength by injection molding.

A handle arrangement is proposed on a suction hose 3 equipped for spray extraction, which has helically extending wave peaks 18 and wave troughs 19 in the manner of an external thread. However, the handle assembly is also applicable to hoses, the wave elasticity serving wave crests and troughs not run helically due to another manufacturing process, but are arranged as alternating rings. The handle assembly may also be adapted for use on smooth-walled tubing. At one end of the suction hose 3, an inner sleeve 9 is fastened in a suitable manner against the suction hose 3 non-rotatably and inserted into a handle tube 1 and is rotatably fixed therein but axially immovable. From suction hose 3 and inner sleeve 9, an elastic fluid line 37 is inserted radially through a wall opening 10 of the handle tube 1 and into the cavity 28 of a handle part 2. The handle part 2 is connected with both ends fixed to the handle tube 1. The liquid line 37 is fixed in the cavity 28 to form a length supply loop 40. On the inner sleeve 9, a receiving space 13 is provided, in which liquid line 37 is displaced from the length supply loop 40 when relative rotations between the suction hose 3 and the handle tube 1 take place. The possible angle of rotation is optionally limited by stops in accordance with the available in the length supply loop 40 line length, but can also be limited by the available in the length supply loop 40 line length itself, ie without stops.

REFERENCE NUMBER LIST

1

handle tube

2

handle part

3

suction

4

kink protection

5

Through opening

6

spigot

7

Conical transition

8th

Cylindrical end section

9

inner sleeve

10

wall opening

11

end face

12

end face

13

accommodation space

14

annular projection

15

annular projection

16

Inner wall surface

17

Outer circumferential surface

18

crests

19

troughs

20

threaded sleeve

21

Female thread

22

stop element

23

half shell

24

half shell

25

fastening point

26

fastening point

27

fastening point

28

cavity

29

annular step

30

end face

31

Inner end

32

circumferential groove

33

head Start

34

locking ring

35

head Start

36

groove

37

liquid line

38

pipe

39

receiving channel

40

Length reserve loop

41

Conductor holder

44

annular step

45

Lip seal ring

46

sealing lip

Claims (10)

1. Handle arrangement on a suction hose (3), in particular equipped for spray extraction, comprising an inner bushing (9) which is attached to one end of the suction hose (3) such that it cannot rotate relative to the suction hose (3) and comprising a handle tube (1) in which the inner bushing (9) is inserted and is fixed therein in a sealed manner such that it can rotate but cannot be displaced in the axial direction, wherein a flexible liquid line (37) is guided outwards from the suction hose (3) and the inner bushing (9) in an approximately radial direction through a wall opening (10) of the handle tube (1) and into a cavity (28) of a handle part (2) which is connected to the hose-side end of the handle tube (1), wherein the liquid line (37) is fixed so as to form a length reserve loop (40) in the handle part (2), wherein a receiving space (13) is provided on the outer circumference of the inner bushing (9), which receiving space is located opposite the wall opening (10) of the handle tube (1) and into which the liquid line (37) from the length reserve loop (40) can be shifted in the case of relative rotations between the suction hose (3) and the handle tube (1), and wherein the rotation angle between the suction hose (3) and the handle tube (1) is delimited according to the length of the liquid line (37) in the length reserve loop (40).
2. Handle arrangement according to claim 1, wherein the rotation angle between the suction hose (3) and the handle tube (1) is delimited by stops (11, 12, 22).
3. Handle arrangement according to claim 1 or 2, wherein the handle part (2) is formed of two half-shells (23, 24) which on the one hand partially tightly surround the handle tube (1) at its suction-hose-side end and on the other hand are also connected to the other end of the handle part (2), wherein the two half-shells (23, 24) form a cavity (28) extending through the handle part (2), through which cavity the liquid line (37) is guided and is fixed in the vicinity of the handle tube (1) by a line holder (41).
4. Handle arrangement according to one of claims 1 to 3, wherein the handle tube (1), which in the region of the inserted inner bushing (9) is designed as a cylindrical end section (8), is formed in an arc shape adjacent thereto.
5. Handle arrangement according to claim 1, wherein the wall opening (10) of the handle tube (1) is designed as a slot-shaped cutout which passes around approximately half the circumference of the handle tube (1) and the end faces (11, 12) of which are arranged approximately diametrically opposite one another in the relative starting position of the handle arrangement and suction hose (3).
6. Handle arrangement according to claim 1, wherein the receiving space (13) at the outer circumference of the inner bushing (9) is delimited in the axial direction by two spaced-apart, flange-like, annular protrusions (14, 15) of the inner bushing (9) and is delimited in the radial directions towards the outside by the inner wall surface (16) of the handle tube (1) and towards the inside by the outer circumferential surface (17) of the inner bushing (9).
7. Handle arrangement according to claim 6, wherein the suction hose (3) has, in a manner known per se, corrugation peaks (18) and corrugation troughs (19) running helically around the outside in the manner of an outer thread, and in that the suction hose (3) pushed onto the inner bushing (9) is pressed against one annular protrusion (14) by a threaded sleeve (20) screwed onto the suction hose (3), which threaded sleeve engages over the annular protrusion (14) and has a stop element (22) pointing radially outwards.
8. Handle arrangement according to claim 7, wherein the stop element (22) of the threaded sleeve (20) is located within the wall opening (10) of the handle tube (1), wherein the two end faces (11, 12) of the wall opening (10) are the stop faces for the stop element (22) which delimit the rotation angle between the suction hose (3) and the handle tube (1).
9. Handle arrangement according to claim 1, wherein the liquid line (37) of the suction hose (3), before entering the inner bushing (9), is located in a tube (38) which extends into the wall opening (10) of the handle tube (1) and is placed in a receiving channel (39) of the inner bushing (9) which extends in the axial direction and is integrally formed in the wall of the inner bushing (9) so as to be open towards the outside.
10. Handle arrangement according to one of claims 1 to 9, wherein the inner bushing (9) has at its end remote from the suction hose (3) an annular step (44) on which a lipped sealing ring (45) is held, the sealing lip (46) of which bears against the inner wall surface (16) of the handle tube (1).

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