WO2017165985A1

WO2017165985A1 - Winding spindle and hand-towel dispenser and method for operating the latter

Info

Publication number: WO2017165985A1
Application number: PCT/CH2017/000024
Authority: WO
Inventors: Michael Roth; Hanspeter Stocker; Marco Stalder
Original assignee: Rvr Service Ag
Priority date: 2016-03-08
Filing date: 2017-03-07
Publication date: 2017-10-05
Also published as: CH712229B1; CH712229A1

Abstract

The invention relates to a winding spindle, to a hand-towel dispenser having such a winding spindle and to a method for using the hand-towel dispenser. The winding spindle (6) has a gear wheel (17), which is operatively connected to an electric motor and on which a clamping bar (19) is fastened. The clamping bar (19) is located in a groove (22) in a circumferential surface of a roller body (20), which can be rotated in relation to the gear wheel (17). In a loading position of the roller body (20), in which the clamping bar (19) is spaced apart from the side walls of the groove (22), an end part of a hand-towel web can be threaded through beneath the clamping bar (19). By virtue of the gear wheel (17) being rotated in a winding-up direction, the roller body (20) is transferred, in relation to the clamping bar (19), into a retaining position, in which a portion of the end part is clamped between a stop surface (24) on the roller body (20) and an opposite clamping surface (25) on the clamping bar (19) and is reliably secured during the winding-up operation. Once the hand-towel web has been wound up on the roller body (20), thus forming a used-up roll, rotation of the gear wheel (17) counter to the winding-up direction releases the clamping on the end part and the winding spindle (6) is drawn out of the used-up roll in the direction of the gear wheel (17).

Description

DESCRIPTION

WICKELDORN AS WELL AS HANDBAG DISPENSER AND TROUBLESHOOTING TO ITS OPERATION

Technical Field The invention relates to a mandrel, a

Towel dispenser in which the same for receiving a

used portion of a towel rail and a method for operating the towel dispenser, which is carried out at the removal of a used towel rail from the same.

State of the art

In towel dispensers, it is essential that in use, an end portion of the towel web is reliably connected to a winding mandrel, so that it does not dissolve even with larger tensile forces and the winding of the used portion of the towel web is ensured on the winding mandrel.

On the other hand, but should the towel rail, if it is essentially completely used and wound up on the mandrel, be removed from the same without much effort.

Numerous designs of a winding mandrel for a towel dispenser have already been specified which are intended to solve this problem.

Thus, according to a first WO 00/069 319 AI removable embodiment, a clamping part is provided, which is designed as mounted on one end of the roller body pivoting lever, which from a holding position in which it in a groove the peripheral surface of the roll body is located and an end portion of a towel rail can clamp against the same, is pivotable in a loading position in which it protrudes from the roll body. Although when loading the towel dispenser, the end part can be easily inserted between the roller body and the pivot lever located in the loading position and then clamped by pivoting the pivot lever in the holding position, but it is not easy to ensure that the end edge of the towel rail to the axis of the Winding mandrel is parallel, ie the towel rail is not warped. Above all, it is not possible to pivot the pivot lever to remove the use of role from the mandrel into the loading position, since it closely surrounds the same. This makes it difficult to pull out the mandrel from the use of role considerably.

According to a second of the same font removable

Embodiment, the clamping part is formed as a flat clamping bar which is resiliently connected to an end piece which engages non-rotatably with the roller body. An inwardly projecting bar protrudes into a groove on the

Peripheral surface of the roller body and clamped between a groove and bar through-threaded end part of the towel rail. Again, pulling the mandrel out of the use roller is difficult, as it usually presses firmly against the outside of the clamping part, which is thereby held in a holding position in which it clamps the end part of the towel rail against the bottom of the groove.

A similar embodiment of a winding mandrel for a

Towel dispenser, wherein the clamping part is formed as a round rod, which in a U-shaped groove in the

Peripheral surface of the roller body is, is off

EP 2 196 123 AI known. In JP 2011 088 689 A is another winding mandrel

described whose preferred application is the winding of strip-shaped electrode assemblies. It comprises two identically formed rods with mutually facing flat inner surfaces and rounded outer surfaces, one of which rotatably and the other rotatable with a

tubular drive part is connected. For this purpose, each of the rods is attached to an anchor part, which is designed as a cylinder sector with an opening angle which is slightly smaller than 180 °. The anchor parts are side by side in the

Interior of the drive part arranged, wherein the

non-rotatable rod bearing anchor part fixedly connected to the drive part, which the rotating rod bearing against it

limited rotatably mounted in the drive part. The rotatable anchor member can be brought by means of a switching device each in a loading position in which the inner surfaces of the bars are parallel and form a gap between them or in a holding position in which they occupy a V-shaped position to each other, and in each case in the assumed position be held. The storage of the rods is quite complicated and since the contact surface of the winding with the rotatable rod is relatively large, is when switching to the loading position for

Removal of the winding u.U. some effort

required. The winding mandrel is also not very robust mechanically and does not seem to be suitable for applications requiring larger dimensions, as is the case in a towel dispenser.

US 1 448 125 A is a field apart from the field of application

generic winding mandrel removable. He has a sleeve which is on an axis surrounding, with a

Spindle-shaped drive part connected shaft plugged and rotatably connected to it and as a clamping part carries a protruding web which projects into a slot in the roll body surrounding the shaft. The roller body can between a loading position, in between a

Clamping surface of the clamping member and a stop surface at the edge of the slot is a gap which continues between the shaft and the roller body and a holding position in which the stop surface presses an end portion of a web against the clamping surface, are rotated. Since the gap has only a short radial section and is curved in continuation, only a short to the end edge

subsequent piece of the web to some extent be introduced easily, especially since the slot extends only over part of the length of the roller body. Thus, a secure hold is not necessarily guaranteed. The position of the end part is also difficult to control and it is only then held when the roller body is in the holding position.

A similar embodiment of a mandrel having similar disadvantages is known from WO 98/04490 AI. Presentation of the invention

The invention is based on the object, a

specify generic winding mandrel, which is suitable as a winding mandrel of a towel dispenser. He should hold the end of a towel web safely, but also a problem-free withdrawal from the use role

enable. In addition, the end part of the towel rail should be easy to insert and its location controllable.

This object is solved by the features in the characterizing part of claim 1. The invention provides a winding mandrel, in which a secure holding an end portion of the towel web is guaranteed, but a withdrawal of the winding mandrel from a wound on the same use role is easily possible, even if the role with considerable

Traction was wound and the mandrel firmly

spanned.

The winding mandrel according to the invention also facilitates this

Pulling in the end part of the towel rail without distorting the end edge, which helps avoid disturbances during operation. The end part can be conveniently - preferably axially from the outer end - introduced and thereby pulled through under the clamping part. Then it is held even without clamping on the winding mandrel, as long as no stronger train acts. Of the

Winding mandrel is also very simple in construction and accordingly robust and easy to manufacture.

The invention further provides a towel dispenser, wherein the winding mandrel according to the invention for winding up the

used portion of the towel rail is used as well as a method of operation of such

Towel dispenser, which in the removal of the one

Used roll on the winding mandrel wound used towel rail is inserted and the advantageous

Properties of the inventive winding mandrel uses. Brief description of the drawings

In the following the invention will be explained in more detail with reference to figures, which represent only exemplary embodiments. Show it schematically a cross section through a

Towel dispenser according to the invention in one

Standby state, a Fig. 1 corresponding cross section, with the towel dispenser in a state of use, a longitudinal section through a winding mandrel according to a first embodiment in a state of charge, a cross section along IV-IV in Fig. 3, schematically a section corresponding to FIG a looped end portion of a towel rail, a section corresponding to Fig. 5a, with the

Wicking mandrel in a holding state, a section corresponding to Fig. 5b, wherein a wound on the winding mandrel is indicated, a section corresponding to Fig. 5c, but with the winding mandrel is again in the state of charge, a section transverse to the axis by a winding mandrel according to the invention second

Embodiment in a state of charge,

7a schematically shows a section corresponding to FIG. 6, with a looped end part of a towel rail, Fig. 7b is a section corresponding to Flg. 7a, with the

Winding dome in a holding state,

Fig. 7c is a section corresponding to Fig. 7b, wherein a wound on the winding mandrel use roller is indicated, and

Fig. 7d is a section corresponding to Fig. 7c, wherein

but the winding mandrel in turn was in the state of charge

Ways to Rasfnhrnng the Krfindnag The invention shown in Figures 1 and 2 towel dispenser has a housing 1 on. It comprises an upper housing part 2 with a Hanne 3, in which a clean section of a towel rail, wound into a supply roll 4, also has a lower housing part 5, in which a winding mandrel 6 is rotatably mounted, on which a used section of the towel rail to one

Use role 7 is wound up. In the upper housing part 2 is also a by a not shown

Electric motor drivable transport roller 8 rotatably mounted, against the front of a spring plate 9 presses, while in the lower housing part 5, a likewise not shown electric motor is installed, which independently drives the winding mandrel 6 via a gear transmission.

The upper housing part 2 is connected to the lower housing part 5 by an intermediate part 10, which is slightly shorter, so that the housing 1 forms a niche 11 there. The upper housing part 2 has at the front of the niche facing the bottom of a discharge slot 12, above which the spring plate 9 and the location of the transport roller 8, against the she pushes, lying. The lower housing part 5 also has a front at the niche 11 facing the top one

Receiving slot 13, on which a further spring plate 14 follows, which presses against a guide plate, not shown.

The towel rail thus comprises the supply roll 4, the use on the mandrel 6 wound use roller 7 and an intermediate portion connecting them, from the supply roll 4 between the transport roller 8 and the spring plate 9 through to the discharge slot 12, then through this, the front part of the niche eleventh and the receiving slot 13 and, between the spring plate 14 and the guide plate, through to the use roller 7 runs. The lying between the discharge slot 12 and the receiving slot 13, ie in front of the niche 11 part of the intermediate portion forms a

exposed use section 15, whose length is e.g. 18cm.

The transport roller 8 is connected to a rotation sensor and a rotary encoder (both not shown). At the

Front side of the intermediate part 11, two directed against the niche 12 infrared sensors 16 are mounted at a distance at the same height side by side.

The functionality of the towel dispenser is as follows:

In the standby state illustrated in FIG. 1, a hand is clamped behind the niche 11 in front of it

Inserted section 15, this is from

registered at least one of the infrared sensors 16 and set the transport roller 8 in motion, which then, from

Encoder controls an additional section of the towel rail that has a preset length - eg 5cm - has, with a portion of appropriate length is withdrawn from the supply roll 4. Of the

Use section 15 extends to the released portion. The towel dispenser is now in the use state shown in Fig. 2, in which the now loose use section 15 can be conveniently used to dry the hands.

Do the infrared sensors 16 speak during a certain time interval - e.g. for 1 sec - not on, so the winding mandrel 6 is set in rotation and pulls the towel web until the use section is taut again. In the further is then due to the signal of the

Encoder controlled transport roller 8 one of

original length of the use section 15 of example 18cm corresponding section of the towel released and at the same time a section of the same length by further rotation of the mandrel 6 retracted. As soon as the transport roller 8 stops, it rises to the

Used role 7 acting tensile force, whereupon the rotation of the winding mandrel 6 is stopped. In this way, a new use section is made, which consists entirely of a clean section of the towel rail. The towel dispenser goes back into the

Standby state according to FIG. 1 via. A first embodiment of the mandrel 6 is shown in Figures 3 and 4. It comprises an anchor part, which is designed as a drive part, in particular as a gear 17, which belongs to the gear transmission, which connects the winding mandrel 6 with the electric motor. A shaft 18, which surrounds an axis of the winding mandrel 6, is rotatably connected to the gear 17. A rigid clamping rod 19 is also rotatably anchored to the gear 17 and otherwise free. He extends, spaced radially from her, parallel to the shaft 18 and has over most of its length on a constant rectangular cross-section. On the shaft 18, a roller body 20 is also rotatably mounted about the axis, which has substantially the shape of a hollow cylinder which surrounds the shaft 18 closed and extends along the axis substantially from the gear 17 to a same opposite outer end. It is held by a sleeve 21 which on the gear 17 opposite outer end of the shaft 18 which projects beyond the outer end of the roller body 20, attached, for example, is screwed and which at the same time for releasably engaging the winding mandrel 6 with a sliding bearing in the lower Housing part 5 is used. The roller body 20 has on its peripheral surface on a concave recess which is formed as an axial groove 22 of most of its length constant rectangular cross-section and the clamping rod 19 receives such that it is spaced from its bottom and radially not on their Side edges protrudes, but preferably as shown slightly surmounted by them, so that it is sunk completely in the groove 22. The position of the clamping rod 19 in a state of charge shown in FIGS. 3 and 4 and its cross section and the cross section of the groove 22 are selected such that between the side walls and the bottom of the groove 22 on the one hand and the lateral boundary surfaces and the lower boundary surface of the clamping bar 19 on the other hand, in each case a distance remains at least the thickness of

Towel rail and preferably about twice this thickness corresponds. The clamping bar 19 tapers at an end portion 23, which adjoins its outer end, against said end to such an extent that the distance from the bottom and the side walls of the groove 22 increases. In addition to this, the roller body 20 is chamfered on an end section adjoining its outer end, such that the depth of the groove 22 decreases towards the outer end of the roller body 20 and disappears at the outer end. As will be explained in more detail below, the left in Fig. 4 side wall of the groove 22 forms a stop surface 24, which cooperates with the clamping surface 25 forming a left lateral boundary surface of the clamping bar 19.

If a clean towel rail is inserted into the towel dispenser, an end part 26 of the same is picked up on the winding mandrel 6 removed from the towel dispenser (FIG. 5 a). For this purpose, the winding mandrel is brought into the state of charge by the gear 17 is rotated if necessary relative to the roller body 20 until it assumes a loading position in which the clamping rod 19 is approximately centrally located in the groove 22 and the distance between the stop surface 24 and the clamping surface 25th greater than the thickness of the towel rail. Then, an end portion 26 of the towel web is drawn by being caught on both sides of the clamping bar 19 and pushed from the outer end along the axis of the winding mandrel 6, such that a portion between the side walls and the bottom of the groove 22 and the same facing interfaces of the

Clamping rod 19, in particular between the stop surface 24 and the clamping surface 25 is located, i. the end part 26 is then between the roller body 20 and the clamping bar 19th

looped through. It is thus already am sufficient

Mandrel defined as long as no stronger train acts. This facilitates further handling. The sliding of the end portion 26 is characterized by the bevel at the end portion of the roll body 20, through which the groove 22 against the outer end of the roll body 20 is flat and by the taper of the end portion 23 of the clamping bar 19, which the distance of the clamping bar 19 from the side walls and the bottom of the groove 22 against the outer end of the clamping bar 19 increases towards, relieved. After the mooring of the end portion 26 on the mandrel 6 of this is used again in the towel dispenser. If the gear 17 is rotated in the winding direction (arrow) during operation, so it takes the clamping rod 19, while the roller body 20 first still stands still until it assumes a holding position relative to the gear 17, in which the

Clamping surface 25 a smaller distance from the

Stop surface 24 has, such that it clamps a portion of the end portion 26 against the stop surface 24 (Fig. 5b). The winding mandrel 6 is thus in a holding state in which the end portion 26 is reliably held by clamping the lying between the stop surface 24 and the clamping surface 25 part, especially as the clamping force is adjusted in accordance with the force exerted by the winding mandrel 6 on the end portion 26 tensile force. Upon further rotation of the gear 17, the roller body 20 is entrained, i. it turns the entire winding mandrel 6, so that increasingly turns of a use role 7 lay around the same

(Figure 5c).

When removing a used towel rail, which substantially completely than on the winding mandrel. 6

wound use roller 7 is present, the winding mandrel 6 with the use of role 7 from the towel dispenser

taken. Subsequently, to return the

Winding mandrel 6 in the loading position the gear 17 light rotated against the Aufwickelsinn (arrow in Fig. 5c) _/ until the roller body 20 opposite the same again assumes the loading position (Fig. 5d), in which the distance between the

Stop surface 24 and the clamping surface 25 is so large that no clamping of the end portion 26 is present. The rotation of the clamping bar 19 relative to the roller body 20 is

problem-free, since the innermost on the groove 22nd

tensioned position of the use roller 7 is slightly spaced from the outside of the clamping bar 19, i. do not press against him. In the loading position of the winding mandrel 6 then without difficulty by pulling the gear 17 from the

Use role 7 pulled and unloaded. The

Use roller 7 can then be e.g. in a laundry

transported, washed and ready for a next use.

In a second embodiment (FIGS. 6, 7a-d) of FIG

Winding mandrel 6, the recess in the peripheral surface of the roller body 20 is not concave, but forms only an axially continuous flat flattening 27, i. the

Peripheral surface of the roller body 20 deviates there from the

Cylinder shell shape against the axis down. Accordingly, the clamping bar 19 is formed flat. It has a convexly rounded outer surface 28, which essentially continues the peripheral surface of the roller body 20. A facing against the roller body 20 inner surface is also slightly convex. In turn, its left half forms a clamping surface 25, which is formed with a stop surface 24, which is formed by the left half of the part of the circumferential surface of the roller body 20 situated in the region of the flattening 27.

interacts. The outer surface 28 of the clamping bar 19 forms slightly more than 20% of the area covered by the use of roller 7 peripheral surface of the winding mandrel 6, while the rest of the peripheral surface of the roller body 20 is formed. The amount the outer surface may be larger, but it is preferably not greater than 30%.

Moreover, the operation corresponds exactly to that of the winding mandrel according to the first embodiment. 7a-c in turn show the looping in and the changeover from the loading position (FIG. 7a) to the holding position (FIG. 7b, c) and the return to the loading position (FIG. 7d)

Preparation of extraction of the winding mandrel 6 from the use roller 7. The retraction of the end portion 26 is

somewhat easier than the first embodiment, in particular if, as provided, the clamping rod 19 also tapers towards the outer end. In addition, since the peripheral surface of the roller body 20 and the outer surface 28 form almost a complete cylinder surface, the towel rail is full on the winding mandrel 6. The end portion 26 is not stretched over sharp edges and is therefore particularly spared.

Because of the small proportion of the outer surface 28 of

Clamping rod 19 on the entire peripheral surface of the winding mandrel 6 is not so strong in the holding state of the winding mandrel 6, the contact of the clamping bar 19 with the innermost on its outer surface 28 running position of the use roller 7 that its rotation relative to the roller body 20 would require greater effort. In the further rotation, the total circumference of the winding mandrel 6 decreases slightly anyway, so that the transfer of the winding mandrel 6 in the state of charge and the withdrawal of the same from the use of 7 roller no difficulties. Bezugazeichenliate

1 housing

2 upper housing part

3 tub

4 supply roll

5 lower housing part

6 mandrel

7 use role

8 transport roller 9 spring plate

10 intermediate part

11 niche

12 delivery slot

13 receiving slot 14 spring plate

15 use section

16 infrared sensor

17 gear

18 wave

19 clamp rod

20 roll body

21 sleeve

22 groove

23 end section

24 stop surface

25 clamping surface

26 end part

27 flattening

28 outer surface

Claims

1. A winding mandrel (6) for a towel dispenser, comprising an armature part arranged at one end of the mandrel (6), having a roller body (20) extending in the direction of an axis from the armature part to the armature part

extending opposite outer end and extending along the roller body (20)

Stop face (24) and with a likewise along the roller body (20) extending clamping part, which has a stop surface (24) opposite clamping surface (25) and opposite the anchor part is non-rotatable, while the roller body (20) relative to the anchor part between a Holding position in which the stop surface (24) has a smaller distance to the clamping surface (25) and a loading position in which the stop surface

(24) has a greater distance to the clamping surface (25), about which the axis is rotatable, characterized

in that the clamping part is designed as a tie rod (19) fastened to the anchor part and otherwise free.

2. winding mandrel according to claim 1, characterized in that the stop surface (24) and the clamping surface

(25) extend parallel to the axis at least approximately over the entire length of the roller body (20) to its outer end.

3. winding mandrel according to claim 1 or 2, characterized

characterized in that it is one with the anchor part

connected, the axle surrounding shaft (18) which projects beyond the outer end of the roller body (20) and the roller body (20) substantially is formed hollow cylindrical and the shaft (18) surrounds.

4. winding mandrel according to one of claims 1 to 3, characterized in that the stop surface (24) is an interface of a recess on the peripheral surface of the roller body (20).

5. winding mandrel according to claim 4, characterized in that the clamping rod (19) and the recess each have at least over the greater part of their length in each case constant cross-section.

6. winding mandrel according to one of claims 1 to 5, characterized in that adjoining an end portion (23) which adjoins an armature part outer end of the clamping bar (19), the radial distance between the clamping bar (19) and the

Roller body (20) towards the outer end to

increased.

7. winding mandrel according to claim 6, characterized in that the clamping bar (19) tapers at the end portion (23) against the outer end.

8. winding mandrel according to one of claims 4 to 1, characterized in that daas the recess as in the

Peripheral surface recessed groove (22) is formed and the clamping bar (19) is arranged in the groove.

9. winding mandrel according to claim 8, characterized in that the roller body (20) adjoins an end portion adjoining the outer end towards the outer end is tapered so that the groove (22) flattens towards the outer end.

10. winding mandrel according to one of claims 4 to 7, characterized in that the recess as a flattening (27) of the peripheral surface is formed and the clamping bar (19) formed flat and on the flattening (27) is arranged.

11. winding mandrel according to one of claims 1 to 10, characterized in that the anchor part as a gear (17) is formed.

12. winding mandrel according to one of claims 1 to 11, characterized in that the peripheral surface of the winding mandrel (6) to at most 30% of a part of the surface of the clamping bar (19) is formed.

13. towel dispenser with a housing (1), a

Apparatus for receiving a supply roll (4) of clean towel web, a rotatably mounted in the housing winding mandrel (6) for receiving used towel rail and a drive motor for rotation thereof in a Aufwickelsinn and at least one rotatably mounted in the housing driven

Transport roller (8), characterized in that the winding mandrel (6) according to one of claims 1 to 11 formed and the drive motor with the armature part of the same is operatively connected.

14. towel dispenser according to claim 13, with a

Towel rail, of which a clean section than

Supply roll (4) is present, an intermediate section via the transport roller (8) to the winding mandrel (6) and guided a used portion on the winding mandrel (6) is wound into a use roller (7), characterized in that an end portion (26) of the used portion of the towel web between the clamping surface (25) of the clamping member and the stop surface (24) of the in the holding position located roller body (20) of the winding mandrel (6) is clamped.

15. A method for operating a towel dispenser after

Claim 14, characterized in that when removing the used to a use roller (7) on the winding mandrel (6) wound used portion of the toweling mandrel (6) the housing (1) removed, the anchor member relative to the roller body (20) against the Aufwickelsinn is rotated, so that the roller body (20) from the holding position in the

Transferred loading position and so the clamping of the end portion (26) of the use roller (7) is released and then the winding mandrel (6) to the side of the anchor part of the use of role (7) is pulled.