DE2401006C2 - Suction tube for dust or liquid suction devices - Google Patents

Description

α projecting over its circumferential surface, _{close to} ^ _{dep recess in}

ÄelsSen passes over and contains an insertion channel locking lug which, just in front of the locking point of an inclined surface, into the receiving _{bore for} the insertion

«Nemu
opaque ü

he will pass over _training .

⁰ 5 di pipe pieces always reliabil-Snander remain connected even after prolonged Benutdem plugging together, cbwohl the unavoidable at ¥ Sfen SchwindmaBe it doing require ^KU r h the tolerance limits significantly -nr "must be ehalten than metallic

ίΐί üSen of suction pipes. At the same time, pipe piece is from B _pipe

are drawn. These pieces of pipe are just like a angled hand tube 3 and a coupler with this, Flexible hose 4 made of duroplastic plastic injection-molded.

The pipe pieces 1 and 2 s, nd on the largest teri. ,. ι; u »i finii ochen on an inner long zyiinun ^ h auigeui.Mv. "..- g ~ nen ^d -_ ^c

_their end sections in a receiving sleeve 5, which contains a receiving hole 6..η which the

other end portion of an adjacent * Ä , o which serves as the plug-in part 7 tightly fitting; escho can be used until the side 8 of this plug partly on an inner shoulder between the acceptance Bore 6 and the longitudinal bore 10 of the receiving sleeve 5 comes to rest. Pipe sections

, ₅ To the by clashes ^^ J ^ * ^. . ^. ^ _{Connection against} unintentional ^ ^{sen to S1}

· S2

at both ends

with the ac

Indian form a flawless seal and em more secure engagement, for example be. Use; from

Nozzles made of rubber or similar factory off

In addition, it is in the case of the suction device according to the invention training advantageous that the at the free end of the

tongues formed by two longitudinal slits

fa »M st. H '^ ch ^ rd ^ ^

surf 14 ^ ^be _{and bd good} B.egeelasti-

^m. ™ has a sttike restoring force without the risk of ^ ¹ ^., H _Unb seSeinungen when at-40 together Jg ^ ^ SSS 12 of an adjacent pipe

initially away to the outside

^{finally in the}

ft and an unnecessary search for the Rastausneh-Sg when establishing the connection by means of a guide channel set to the size of the locking lug can be omitted.

The invention is described below using an exemplary embodiment, a suction pipe for dust or liquid suction devices, closer to the drawing described and explained It shows

F i g. 1 the suction pipe on part of its length in Section and partly in the side view,

2 shows an axial longitudinal section through the plug-in part one of the pipe sections of the suction pipe after

^F V ^g ig: 3The receiving socket, like this, a tubular piece in the view of its spring-elastic jacket strip.

^fen _Fi , ₄ the receiving sleeve in one after the line * o

IV guided axial longitudinal section and

^1V F ^g i _g . 5 one after the line V in F, g. 4 guided

Cross-section through the receiving sleeve.

^W The suction pipe shown contains several sub-

coinciding with each other through togetherness

plug in connectable pipe pieces, of whichj.der

Assembly drawing according to Fig. only

7we.i pipe sections shown and with 1 and i De-

13 "v" ft _Zusamme nst _e CKEN in

"watch that you go straight to the ^ ^ ^ ^ ^ ^ ^ _p . g. 5 deuU.ch

Way one on the end face 17 of the au- ^ starting longitudinal rib 18 molded, the width of the locking lug 12 coordinated,

, S ^^ ndei. Introduction channel 19 contains. _{Introductory canal remains visible} when the en- ^ ^ «ntun ^^" ^ _{5 so} that it

_oh ne another succeed, the catch 12 in the E.nfuh- ° ^hne ^ _singl ^g _uset L. _is Upon further pushing the em- £ ^ _{the latch 12} by a nearing

into the recess 13

^ 3 fi £ SÄW t kept connected, whereby it is particularly- £ ™ ue «» _{ft that dje} ^ _{Au $ nah d} ^

continuously cylindrical Α «^" «*« 21 U ^ ,, _{7 the two} longitudinal slats 15 and

able to cover moisture-proof. '"' _cher ^ _{wje the two} pipe pieces 1 and

_{The hand tube} 3 has a socket 23 for

the insertion end 7 of the pipe section 1. This receiving sleeve also contains 24 in a longitudinal rib an axially parallel insertion channel 25, which the locking lug 12 on the plug-in part 7 against rotation secures and leads exactly into the locking recess 26 of the receiving sleeve 23 when plugged together.

For the connection of accessories not shown in the drawing, such as Variously shaped suction mouthpieces or suction nozzles are connecting pieces for these accessories 30 are provided, which are designed with the same shape as the plug-in parts 7 of the pipe sections 1 and 2 and each likewise an outwardly protruding latching lug 31 connected in one piece with the connecting piece carry. This connecting piece 30 can optionally instead of another, not shown in the drawing Extension pipe section in the receiving sleeve 5 of the lower pipe section 2 in the one described above Way to be inserted, with the locking lug 31 in the insertion channel 19 against lateral rotation

ίο is secured.

For this purpose 2 sheets of drawings

Claims (1)

Claim: Suction pipe for dust or liquid suction devices with several matching pipe pieces made of plastic that can be connected by plugging together, each of which is designed at one of its end sections as a receiving sleeve for the other end section of an adjacent pipe section, which is designed as a plug-in part, and with a latching connection for two pipe sections, the two comprises mutually cooperating latching members namely a latching nose and a latching recess, and the one of these two locking members supporting, elastically bracing during mating and in the locking position, relaxing, designed as a jacket strip of the tubular piece tongue formed by two axially parallel longitudinal slots with respect to the remaining casing surface of their associated pipe section delimited in the circumferential direction is characterized in that the latching lug (12) sits on the insertion end which is undivided in the circumferential direction, that the jacket strip (14) contains the latching recess (13) and in F orm of a web is integrally connected to the tube at both ends and that this web, in addition to the jacket strip, also includes the end section of a longitudinal rib which starts at the end face (17) of the receiving sleeve (5) and protrudes over its circumferential surface, which is also located between the longitudinal slots (16) (IS), which merges into the jacket strip close to the recess (13) and contains an insertion channel (19) for the locking lug, which, just in front of the locking recess (13), has an inclined surface (20) in the receiving bore located in the receiving sleeve ( 5) passes over for the insertion end (7) The invention relates to a suction tube for dust or liquid suction devices with several matching, by plugging together connectable pipe pieces made of plastic, each of which on one of its End sections as a receiving sleeve for the other end section of an adjacent one, designed as a plug-in part Pipe section is formed, and with a locking connection for two pipe sections, the two interacting locking members, namely a locking lug and a locking recess, and a the one of these two locking members carrying, elastically bracing when plugged together and in the Latching position relaxing, designed as a jacket strip of the pipe section includes tongue, which by two axially parallel longitudinal slots opposite the remaining lateral surface of their associated pipe section in Circumferential direction is delimited. In a known suction pipe of this type (DT-Gbm 48 052), the nested pipe sections can be detached from one another by twisting them somewhat with respect to one another. As a result, the locking lug provided in the known suction tube in the form of a button with a resilient tongue can move towards the inside of the tube and thus disengage from the locking recess located in the receiving sleeve of the other end of the tube. If this known suction pipe with pipe pieces that are plugged into one another and locked together is sucked in the usual way with Saugouse and the nozzle is steered by hand over the surface to be cleaned, for example a carpet, then it cannot be avoided that the nested stirring pieces rotate be stressed, with S ? £ ^ connections inadvertently loose? can, in particular even after a long period of use of the vacuum tube and the wear and tear caused by it and as a result of unavoidable material fatigue of the locking tongue. The Dannie pipe connection also has the disadvantage that the locking tongue formed by the axially parallel longitudinal shafts lies in the end of the pipe section to be inserted, so that the dust and dirt particles carried along in the suction air flow get stuck in these longitudinal shafts and the mobility and d, e flawless Function of the locking tongue and thus the locking connection itself can impair. BeTeinfr other known execution (US-PS , «25 80 725) is the suction pipe of a dust or liquid vacuum cleaner also made of pluggable blanks, in which the receiving sleeve of the one End section of the pipe section several parallel Ouerschlitze as locking openings for the plug-in «De of the end section of the other pipe section; trained Rasinocken has next is in this version an insertion channel connecting the parallel locking slots lying transversely to the longitudinal axis of the tube is provided which lies parallel to the axis of the plug-in sleeve and also serves to insert the locking cam longitudinally in this execution the connection of the two Pieces of pipe and the release of the locking connection by turning the pipe section causes so that here too the disadvantage of inadvertent loosening of the locking connection when working with the suction tube and as a result There is wear and tear of the material after prolonged use. Furthermore, this is known Execution at the insertion end of the pipe section to be inserted several distributed over the circumference Longitudinal slots are provided, between which movable, tongue-like longitudinal sections are formed. This on Longitudinal tubes located at the end of the pipe are used for the usual robust and careless handling of the raw pieces during their storage and use «Suitable for trouble-free long-term use, as the plug-in connection can be easily bent, In particular, bending out one of the tongues at the insertion end becomes unusable. In the end there is also the disadvantage with this embodiment that the dirt entrained in the suction air flow is in the Can establish longitudinal slots. In contrast, the invention is based on the object to form a suction pipe of the type mentioned so that the connection of the pipe sections without Turning is made possible that at the same time a rotation protection against unintentional rotation is created and fatigue of the tongue and contamination of the parts causing the locking connection, even in the rough Continuous operation are avoided. This object is achieved according to the invention in the intake manifold mentioned at the outset in that the Latching lug on the insertion end, which is undivided in the circumferential direction, sits so that the jacket strip forms the latching recess contains and is integrally connected to the tube at its two ends in the form of a web and that this web in addition to the jacket strip also lies between the longitudinal slots section one on the front of the socket