EP0501029B1 - Warp beam carrier for the exchange of warp beams with floating axle bearings - Google Patents

Description

The invention relates to a warp beam pallet truck for changing a warp beam in a weaving machine, the warp beam of thru axles in the weaving machine can be received and the pallet truck has a pivotably mounted support beam, in the free and open ends of which sliding beams that can be adjusted to the length of the warp beam are inserted, and each Sliding beam has a support arm having a pipe gripper.

Kettbaum pallet trucks with hydraulically movable support bars and with support arms which are axially displaceably received in the support bar and which are equipped with a pipe gripper for receiving the warp beam pipe are known.

These support arms have a fine height adjustment to ensure that the thru axles can be removed and inserted correctly when changing the warp beam. That means, in particular before inserting the thru axle, the support arms of the lifting truck with the warp beam tube must be precisely aligned with the bearing of the thru axles in the weaving machine, both in height and in depth. The bearing hole for the quick-release axle and the quick-release axle holder in the warp beam tube must be aligned opposite one another in order to be able to insert the quick-release axles into the receptacle of the warp beam tube.

Due to the considerable weight of the pallet truck carrying the full warp beam, it is difficult to move and align the pallet truck by hand and is therefore extremely time-consuming.

After the warp beam has been inserted into the weaving machine, it must also be aligned laterally to the weaving machine in order to ensure a parallel and right-angled thread course from the warp beam to ensure the heald frames. This alignment is also time-consuming and affects the productivity of the weaving machine.

When the empty warp beam is removed from the weaving machine, the lifting arms of the lifting truck must also be precisely aligned in height and depth with the warp beam tube. If such alignment is only inaccurate, it is not possible to pull out the thru axles as a result of the level difference between the thru axle and its receptacles and the resulting clamping effect.

A warp beam carriage with lifting arms for carrying a warp beam is known from the published patent application DE-A1-31 30 328.

The lifting arms are designed to be pivoted up and down by means of a hydraulic piston-cylinder unit about an axis lying parallel to the longitudinal axis of a longitudinal bar. To improve the maneuvering properties of the lifting truck, at least one of two cross bars, which form the chassis of the lifting truck with the longitudinal bar, is arranged so as to be adjustable in the direction of the longitudinal axis of the longitudinal bar.

DE-OS 31 30 328 does not disclose any technical teaching, according to which the warp beam carriage can be positioned in or out of the weaving machine for the purpose of transferring or taking over a warp beam in such a way that warp beams which are stored in the weaving machine by means of thru axles without a manual one Readjustments in the x, y and z axes are sufficient.

Furthermore, the published patent application DE-A1-33 30 308 discloses a warp beam insert carriage which aims to minimize the total length of the warp beam insert carriage for the purpose of favorable maneuverability, favorable cornering behavior and to maintain the smallest possible swivel radius under load. For this purpose, the support tube having the load-carrying means is designed as a center piece, into which a respective side rail fixed telescopic tube is telescopic. This allows the warp beam insert carriage to be adjusted to the respective nominal length of the warp beam to be transported.

An instruction that the Kettbaum insertion carriage eliminates the need to manually level the thru-axle bearing or the thru-axle receptacle when transferring or taking over the warp beam into or from the weaving machine is not disclosed.

The warp beam insert trolley acc. DE-OS 33 30 308 is therefore not suitable for inserting a warp beam with thru-axle bearing into the weaving machine without having to take additional manual measures.

The published document FR-A1-2 281 401 discloses alternative solutions of a device independent of a warp beam transport carriage for storing a warp beam equipped with a warp beam tube, which is carried by thru axles for the rotating mounting thereof.

The individual devices aim to receive a warp beam that is not rotatably mounted in a first level at its tube ends and to lift it to a second level for the purpose of its rotating mounting.

The FR laid-open specification also does not disclose any technical teaching that a warp beam transport carriage can be positioned in or out of the weaving machine for the purpose of transferring or taking over a warp beam in such a way that warp beams that are stored in the weaving machine by means of thru axles can be moved without a manual one Readjustment get along.

The object of the invention is therefore to develop a Kettbaum pallet truck of the aforementioned type in connection with a weaving machine in such a way that three-dimensional positioning of the Kettbaum pallet truck on the weaving machine is made possible without the purpose of producing and releasing the thru-axle connection between the warp beam and the weaving machine a manual readjustment on the warp beam holder is necessary.

According to the invention the object is achieved in that an arm limiting the travel path of the lifting truck into the weaving machine is provided with a stop element on the sliding spars, parallel to the supporting arms equipped with the pipe gripper, that means for leveling the warp beam carried by the pipe gripper with the arm is provided on the arm the thru-axle bearing of the weaving machine is arranged in each case and that the lifting truck and the weaving machine have provisions on at least one side for fixing the lifting truck to the side in the weaving machine. In a further embodiment of the invention, each stop element and each means leveling the relevant support arm can be placed on the respective thru-axle bearing of the weaving machine that receives the thru-axle.

An adjustable element, which is arranged at the free end of an arm fixedly connected to the sliding beam, acts as a stop and comes with its free end to the center of the housing of the thru-axle bearing of the weaving machine. The contact surface of the free end of the adjustable stop element is expediently slightly spherical.

In order to ensure that the warp beam is received by the support arms of the lifting truck in such a way that an unimpeded connection of the warp beam and the weaving machine is ensured by means of the thru axles, leveling means according to the invention are provided which completely compensate for the possible level differences between the thru-axle receptacle of the warp beam tube and the thru-axle bearing of the weaving machine compensate. The leveling means consist of a swivel lever, which is preferably arranged on the arm and is rotatably mounted about an axis, the free lever arm of which engages over the thru-axle bearing of the weaving machine and holds a role that determines the leveling.

Furthermore, the pivot lever is connected to an actuating device, which is preferably supported on the arm, which can be, for example, a hydraulically operated piston-cylinder unit, a linear motor or a threaded spindle, for example, which can be actuated by hand.

In order to be able to carry out the leveling, it is furthermore provided that the sliding bars together with the carrying bars can be rotated by at least an amount which represents the level difference between the center axis of the warp beam tube and the center axis of the thru-axle bearing and which can be in the millimeter range.

For this purpose, the support bar is pivotally mounted in a lifting trolley.

Furthermore, the leveling roller of the swivel lever, viewed in the direction of travel of the lifting truck on the weaving machine, is preferably brought to bear on the bearing housing behind the geometric longitudinal axis of the housing of the thru-axle bearings. Finally, provisions are made on the weaving machine for the lateral positioning of the lifting truck in the weaving machine, which consist of a fixing element which is preferably fixedly arranged in the area of the bearing housing of the thru axles and which, with the side-fixing arrangements on the lifting truck, guides the lifting truck immediately before it reaches its operating position in the weaving machine guaranteed. These side-fixing arrangements consist of at least two fixing rollers arranged axially parallel in the area of the depth stop.

The advantage of the warp beam lift truck according to the invention is that the previously necessary and manual alignment of the warp beam lift truck lifting out of the weaving machine and inserting it into the machine is completely eliminated. In contrast to the known procedures for establishing the thru-axle connection between the warp beam and the weaving machine, the thru-axles and axle receptacles are treated more gently and the life of the thru-axle and, in particular, the bearings is considerably extended. The solution according to the invention also has a decisive influence on reducing the time previously estimated for a warp beam change and increases the productivity of the weaving machine.

Fig. 1

einen schematisch dargestellten Kettbaum-Hubwagen in der Webmaschine mit der Seitenfixiereinrichtung und der Nivelliervorrichtung in der Draufsicht bei aufgenommenen Kettbaum

Fig. 2

die Nivelliervorrichtung in der Seitenansicht "A" gemäß Fig. 1 in Schließstellung bei aufgenommenem Kettbaum

Fig. 3

die Nivelliervorrichtung in der Seitenansicht "A" gemäß Fig. 1 in geöffneter Stellung bei aufgenommenem Kettbaum

Fig. 4

die Nivelliervorrichtung ohne Kettbaum in der Seitenansicht

The invention will be described in more detail below using an exemplary embodiment. In the accompanying drawings shows

Fig. 1

a schematically shown warp beam pallet truck in the weaving machine with the side fixing device and the leveling device in plan view with the warp beam taken

Fig. 2

the leveling device in side view "A" according to FIG. 1 in the closed position with the warp beam taken up

Fig. 3

the leveling device in side view "A" according to FIG. 1 in the open position with the warp beam taken up

Fig. 4

the leveling device without warp beam in side view

1, the loom 3 is only shown schematically. The weaving machine 3 has a left thru-axle bearing or bearing housing 5 and a right thru-axle bearing 5 ', in which the corresponding thru axles 4, 4' are accommodated in an axially displaceable manner.

The warp beam 2 accommodated in the weaving machine 3, consisting of the warp beam disks arranged on a warp beam tube at a spacing from one another, is received at its tube ends, which have a coupling element for the thru axles, by the respective thru axis 4, 4 '.

The warp beam pallet truck 1, also shown schematically, for warp beams which are coupled to the weaving machine via thru axles, according to the invention essentially consists of a crossmember 22 which receives a rotatably mounted support beam 6 in its crossmember arms. On both sides of the support beam 6, which is designed as a tubular body, sliding beams 7, 7 'are provided, which are axially displaceably mounted in the support beam 6 and are detachably connected to the support beam by corresponding locking means 6a, 6b.

At the free ends of the sliding beams 7, 7 ', an arm 10, 10' designed as a carrier is fixedly connected to the stop element 16, which, as can be seen in FIG. 2, comes into contact with the bearing housing 5, 5 '. Furthermore, each sliding spar 7, 7 'receives a support arm 9, 9' which is axially adjustable on the sliding spar and is designed at its free end as a tubular gripper 8, 8 '. Due to the axial displaceability of the support arms 9, 9 ', these can be adapted to the respective width of the warp beam receptacles.

1 also shows a fixing element 25 arranged on the weaving machine 3 with a wedge-shaped nose and parallel centering surfaces against which centering or fixing rollers 31 arranged axially parallel run in the area of the arm 10 of the lifting truck 1.

The means 15, 15 'leveling the support arm 9, 9' are shown in FIGS. The means 15, 15 'which level the height of the support arm 9, 9' consist of a piston-cylinder unit 21, 21 'which is articulated on the arm 10, 10', the piston rod 20, 20 'of which is also attached to the arm 10, 10 'articulated pivot lever 18,18' is connected. The pivot levers 18, 18 'are designed such that they overlap the bearing housing 5.5' when the stop element 16 lies against the bearing housing 5.5 'in such a way that the leveling roller 19, 19' arranged at the free end of the pivot lever 18, 18 'eccentrically specifically behind the longitudinal axis 24 of the bearing housing 5.5 'on the bearing housing. This eccentric system causes the force generated on the bearing housing 5.5 'by the piston-cylinder unit 21.21' and exerted on the bearing housing by the leveling roller 19.19 'to force the Kettbaum pallet truck 1 and thus the arm 10.10' with stop element 16 remains in the stop position on the weaving machine during the leveling process. This means that a force acts which pulls the arm 10, 10 'with the stop element 16 against the bearing housing 5.5'.

From Fig. 3 it can be seen that the pipe gripper 8,8 'has the Kettbaumrohr 11,11' in the region of the thru-axle connection and there is a difference dimension "h" between the axle 26 of the thru-axle bearing and the axle 27 of Kettbaumrohr can also have the amount zero, that is, the pipe gripper 8,8 'has raised the warp beam pipe to the exact position for the thru-axle connection before the necessary leveling of the support arms 9,9'. However, this is an exception. The difference "h" is eliminated by the leveling means 15, 15 '. This ensures that the stub axle 4, 4 'is inserted and removed correctly into and out of the thru axle bearing 5, 5'.

In FIG. 4, the adjustable stop element 16 is shown at the free end of the arm 10, 10 ', which is screwed centrally into the end face of the arm 10, 10', which is closed with a sheet metal 29, and secured by means of the lock nut 32. The surface 30 of the stop element 16 which comes into contact with the bearing housing 5.5 'is preferably spherical in order to achieve a point contact and to possibly result in vertical displacements between the support arm 9.9' and the housing bearing resulting from the leveling of the support arm 9.9 ' 5.5 'to be carried out with little friction.

The leveling roller 19, 19 'on the pivoting lever 18, 18' can also be adjusted in height in accordance with the direction of the arrow 33 via an adjusting element (not shown).

The function of the Kettbaum lift truck 1 is now as follows: The Kettbaum lift truck 1 moves with the full Kettbaum 2 in the entry direction 23 up to the position specified by the stop elements 16 in parallel in the weaving machine 3. Before reaching the specified position, the side fixation 14 of the lifting truck 1 in the weaving machine 3 by the wedge-shaped nose of the fixing element 25, which is arranged on the weaving machine, between the fixing rollers 31. The motorized Kettbaum pallet truck 1 runs, limited by the Stop elements 16, up to the bearing housing 5.5 'of the weaving machine 3. After the predetermined position, which can be signaled, for example, optically or acoustically, is reached, the leveling roller 19, is activated by hydraulic action on the working cylinder of the piston-cylinder unit 21, 21'. 19 'of the pivot lever 18,18' brought into contact with the bearing housing 5.5 '. The warp beam 2 is held in a position in which the thru-axle bearing 5, 5 'and the thru-axle receptacle of the warp beam tube are almost aligned. The support arms 9, 9 'are now raised to the necessary position together with the warp beam by means of the leveling means 15, 15', as a result of which the sliding beams 7, 7 'experience a rotational movement about their longitudinal axis, and the support arms 9, 9' the warp beam tube 11 , 11 'support. The thru-axle bearings 5.5 'and the thru-axle receptacles of the warp beam tube 11, 11' are then in alignment.

The thru axles 4,4 'can now be easily pushed into the thru axle bearings 5,5' of the weaving machine and into the thru axle receptacles of the warp beam 2. The leveling means 15 are subsequently opened so that the support arms 9, 9 ′ of the lifting truck 1 can be lowered. The warp beam pallet truck is then moved out of it parallel to the weaving machine by uncoupling the side fixation and prepared for a next warp beam change.

List of reference numbers

1

Pallet truck

2nd

Warp beam

3rd

Weaving machine

4, 4 '

Thru axle

5, 5 '

Thru axle bearing weaving machine

6

Tragholm

7, 7 '

Sliding beam

8, 8 '

Pipe grab

9, 9 '

Beam

10.10 '

Depth stop

11.11 '

Warp beam tube

12th

Work unit pallet truck

13

Working unit weaving machine

14

Side fixation precautions

15.15 '

leveling means

16

Stop element

17.17 '

axis

18.18 '

Swivel lever

19.19 '

Leveling roller

20.20 '

Piston rod

21.21 '

Piston-cylinder unit

22

traverse

23

Direction of entry

24th

Longitudinal axis

25th

Fixing element

26

Axis cross

27

Axis cross

28

Stop element

29

sheet

30th

surface

31

Fixing rollers

32

Lock nut

33

Arrow direction

Claims (10)

1. Warp beam lift truck (1) for exchanging a warp beam (2) in a loom (3) wherein the warp beam (2) can be accommodated in the loom by knockout spindles (4, 4') and the lift truck (1) includes a pivotably mounted bearing spar (6), in the free and open ends of which there are inserted sliding spars (7, 7') which can be adapted to the length of the warp beam, and wherein each sliding spar (7, 7') has a bearing arm (9, 9') including a tube grabber (8 or 8'), characterised in that on the sliding spars (7, 7'), parallel to the bearing arms (9, 9') which are equipped with the tube grabbers (8, 8'), an arm (10, 10') delimiting the travel of the lift truck (1) into the loom (3) and having a stop element (16) is provided; in that there are arranged on the arm (10, 10') means (15, 15') for levelling the warp beam tube (11, 11') with the respective knockout spindle bearing of the loom which accommodates the knockout spindle, the warp beam tube being supported on the tube grabber (8, 8'); and in that both the lift truck (1) and the loom (3) include, on at least one side, arrangements (14) for the sideways location of the lift truck (1) in the loom (3).
2. Warp beam lift truck according to claim 1, characterised in that both the stop element (16) and the means (15, 15') on the arm (10, 10') with the knockout spindle bearing (5, 5') of the loom, which bearing accommodates the knockout spindle (4, 4'), can be applied in a levelling manner to the knockout spindle bearing (5, 5').
3. Warp beam lift truck according to claim 2, characterised in that each arm (10, 10') is a support which is connected securely to the sliding spar (7, 7'), on which the end of the stop element (16) which is turned towards the knockout spindle bearing (5, 5') is provided in an adjustable manner.
4. Warp beam lift truck according to claims 1 and 2, characterised in that the means (15, 15') consist of a pivot lever (18, 18') mounted on each arm (10, 10') in a rotatable manner about a shaft (17, 17'), on which pivot lever there is disposed that end of a roll (19, 19') intended for the levelling which overlaps the knockout spindle bearing (5, 5'), and, furthermore, of an actuating device which preferably supports itself at one end, on the arm (10, 10'), which actuating element is connected at the other end to the pivot lever (18, 18').
5. Warp beam lift truck according to claim 4, characterised in that the actuating device is preferably a piston cylinder unit (21, 21').
6. Warp beam lift truck according to claims 1 and 4, characterised in that the sliding spars (7, 7') together with the bearing spar (6) can be moved by an amount of a rotational angle, which amount is equivalent to the amount (h).
7. Warp beam lift truck according to claim 6, characterised in that the bearing spar (6) is accommodated in a rotatable manner in a lift truck cross-piece (22).
8. Warp beam lift truck according to claims 4 and 6, characterised in that the levelling roller (19, 19') of the pivot lever (18, 18') can be applied on the bearing housing, preferably behind, when viewed in the direction of introduction (23) of the lift truck (1), the geometrical longitudinal axis (24) of the housing of the knockout spindle bearings (5, 5').
9. Warp beam lift truck according to claim 1, characterised in that the sideways location arrangements (14) on the loom (3) consist of a securing element (25) preferably disposed in the vicinity of the knockout spindle bearing (5).
10. Warp beam lift truck according to claim 1, characterised in that the sideways location arrangements (14) on the lift truck (1) consist of at least two locating rollers (31) which are disposed in the vicinity of the arm (10) with their axes parallel.

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