EP4049763A1 - Paint roller and method for mounting a paint roller - Google Patents

Abstract

The invention relates to a paint roller with a holding bracket (1), at one end of which a handle (2) is provided and a straight section (3) delimited by the other end, on which a cylindrical roller body (4) is rotatably held, each An end piece (5) is inserted at each open end of the roller body (4), each end piece (5) having a central opening (6) for passing through the straight section (3) of the retaining bracket (1), each end piece (5 ) towards the inside of the roller body (4) extends a pipe section (7) in the axial direction, the pipe sections (7) of both end pieces (5) being connected by means of a connecting pipe (9), the pipe section (7) having a first section (A1 ) with a first inner diameter (I1) and a second section (A2) with a second inner diameter (I2) which is larger than the first inner diameter (I1), and a first support surface (S1) for axially supporting a clamping sleeve (8) up ice.

Description

The invention relates to a paint roller according to the preamble of patent claim 1.

Such a paint roller is, for example, from DE 30 14 285 A1 known. In the known paint roller, an end piece is inserted into the open ends of a roller body. The end pieces each have a central opening for passing through a straight section of a headband. A tube section extends from each end piece towards the interior of the roller body in the axial direction. The tube sections of both end pieces are connected by means of a connecting tube. - The production of the end piece, the connecting tube and the clamping sleeve sometimes requires the provision of injection molding tools, which are expensive to produce. This makes the production of the known paint roller expensive overall.

the DE OS 2 112 385 discloses a paint roller in which a ferrule is rotatably received in each end piece. The clamping sleeve is fixed in the end piece by means of a safety lip. A similar paint roller is also from the FR 2 130 086 known. In this case, too, the production of an injection mold for the end piece is complex.

the FR 1 324 341 , FR 1 507 239 as well as the FR 1 557 866 disclose a paint roller in which the straight section of the holding bracket is fixed in each case with a clamping sleeve which is rotatably accommodated in a connecting pipe connecting the pipe sections of the end pieces. The clamping sleeve is fixed in the connecting tube on both sides in the axial direction by means of spacer sleeves. The spacer sleeves are held in the connecting tube by means of an inwardly projecting, circumferential bead. The manufacture of the connecting tube with the clamping sleeve held therein between the spacer sleeves is complex.

At one from the FR 2 251 380 known paint roller, the straight section of the headband is fastened with a multi-part sleeve and a clamping element.

the FR 2 739 307 discloses a multi-part end piece in which the collet is rotatably received. The manufacture of a multi-part end piece is also complex. From the DE 81 14 785 a paint roller is known in which the pipe sections extending from the end pieces are connected directly to one another. The tube sections form a recess for rotatably receiving a clamping sleeve. Here, too, the injection molding tools for producing the different end pieces are complex.

the FR 2 647 035 describes a paint roller in which a clamping sleeve is accommodated within a connecting tube connecting the tube sections of the end pieces. An axial mobility of the clamping sleeve is limited by means of spacer sleeves provided on both sides of the clamping sleeve.

the EP 0 389 357 B1 discloses a paint roller in which each collet is rotatably held on the tubular portion of an end piece by means of a snap-in connection. Here, too, the production of the paint roller requires the provision of complex injection molding tools.

the DE 33 19 036 A1 relates to a paint roller in which the end of the straight portion of the bracket is held in a collet. The ferrule is retained in a pocket at the end of a length of tubing extending from one of the end fittings.

From the DE 85 01 549 a paint roller with a solid roller body is known. A recess for receiving the clamping sleeve is provided within the roller body. The introduction of the clamping sleeve into the recess requires the provision of special tools.

the FR 2 593 725 discloses a paint roller in which the connecting tube is formed in two parts. A recess for rotatably receiving a clamping sleeve is provided in the connecting tube. The production of the two-part connecting tube is complex.

the FR 1 272 880 describes a paint roller in which the straight section of the bracket is fixed inside the roller body by means of tension springs.

The object of the invention is to specify a paint roller that can be produced as easily and inexpensively as possible, as well as a method for its production.

This object is solved by the features of patent claims 1 and 8. Expedient refinements of the invention result from the dependent patent claims.

• an einer Innenseite des Rohrabschnitts in einem vorgegebenen axialen Abstand von der ersten Stützfläche eine Anschlagfläche zum Begrenzen einer Einstecktiefe eines Endes des Verbindungsrohrs gebildet ist,
• ein dritter Innendurchmesser des Verbindungsrohrs kleiner als ein Außendurchmesser der Klemmhülse ist, so dass das bis auf die Anschlagfläche eingesteckte eine Ende des Verbindungsrohrs eine zweite Stützfläche zum axialen Abstützen der Klemmhülse bildet, und
• der axiale Abstand größer ist als eine Länge der Klemmhülse, und der Außendurchmesser der Klemmhülse kleiner ist als der erste Innendurchmesser des Rohrabschnitts und größer ist als der Durchmesser des Durchbruchs, so dass die Klemmhülse drehbar im ersten Abschnitt gehalten ist.

According to the invention it is proposed that

• a stop surface for limiting an insertion depth of an end of the connecting pipe is formed on an inside of the pipe section at a predetermined axial distance from the first support surface,
• a third inside diameter of the connecting tube is smaller than an outside diameter of the clamping sleeve, so that the one end of the connecting tube inserted up to the stop surface forms a second support surface for axially supporting the clamping sleeve, and
• the axial distance is greater than a length of the ferrule, and the outer diameter of the ferrule is less than the first inner diameter of the tubular section and greater than the diameter of the aperture such that the ferrule is rotatably retained in the first section.

The proposed paint roller can be produced easily and inexpensively. The end pieces are identical. They can be made using a simple injection molding tool. The connecting pipe and the roller body are designed as simple pipe sections. They can be produced inexpensively by means of extrusion. The clamping sleeves are identical. They can also be produced using a simple injection molding tool.

In addition, the proposed paint roller can be installed particularly easily in that the aforementioned components are advantageously only connected to one another by friction. This enables cost-effective mass production.

According to one embodiment, the first inside diameter is larger than the diameter of the opening, so that the first circumferential support surface, which projects radially inward, is formed at the opening for supporting the clamping sleeve. The end piece expediently has a circumferential flange to limit the depth of insertion into the roller body. An end piece with the aforementioned features can be easily produced using an injection molding tool of simple design.

According to a further embodiment, the end piece is held in the roller body by friction with a first clamping force K1. Furthermore, the end of the connecting pipe can be held in the pipe section by friction with a second clamping force K2. This enables the paint roller to be manufactured easily.

wobei n die Anzahl der Klemmhülsen ist.According to a further embodiment, the clamping sleeve is held on the straight section of the bracket by friction with a third clamping force K3. The clamping forces are expediently chosen so that the following relationship applies: $$\mathrm{<figure-callout\; id="1"\; label="K"\; filenames="imgf0001.png,imgf0008.png"\; state="\{\{state\}\}">K</figure-callout>}1+\mathrm{<figure-callout\; id="2"\; label="K"\; filenames="imgf0001.png,imgf0008.png"\; state="\{\{state\}\}">K</figure-callout>}2>\mathrm{n}\times \mathrm{K}3,$$

where n is the number of ferrules.

This allows the inking roller to be removed from or placed onto the straight portion of the mounting bracket without either end cap detaching from the roller body. This makes it possible to replace the roller body.

The different frictional forces can be generated by different fits of the diameters of the clamped components, different lengths of the components plugged into each other, whereby the diameter or the fit can remain the same, different surface qualities or by choosing different materials that have different elasticity. The diameter or the fit of the parts plugged into one another can preferably remain the same.

1. a) Bereitstellen einer Montagestange und einer die Montagestange umgebenden Stütze zum Abstützen eines Endstücks,
2. b) aufeinanderfolgendes Aufstecken auf die Montagestange
   • eines Endstücks,
   • einer Klemmhülse,
   • des Verbindungsrohrs,
   • wahlweise der anderen Klemmhülse,
   • des Walzenkörpers und
   • des anderen Endstücks
   • und
3. c) Ausüben eines Pressdrucks auf die Endstücke, so dass eine reibschlüssige Verbindung zwischen den Endstücken und dem Walzenkörper sowie zwischen dem Verbindungsrohr und den Rohrabschnitten der Endstücke gebildet wird.

According to a further aspect of the invention, a method for assembling the paint roller according to the invention is proposed with the following steps:

1. a) providing a mounting bar and a support surrounding the mounting bar for supporting an end piece,
2. b) successive plugging onto the assembly rod
   • a tail,
   • a collet,
   • of the connecting pipe,
   • optionally the other clamping sleeve,
   • the roller body and
   • of the other end
   • and
3. c) Exerting pressure on the end pieces so that a frictional connection is formed between the end pieces and the roller body and between the connecting pipe and the pipe sections of the end pieces.

Expediently, exactly two clamping sleeves are used within the scope of the present invention. However, it is also possible to omit one of the two clamping sleeves or to replace it with a spacer sleeve which is rotatably held on the straight section

The proposed method enables quick and easy assembly of the paint roller according to the invention.

According to a particularly advantageous embodiment, the straight section of the holding bracket can be used as the mounting rod. In this way, a paint roller can be mounted immediately without having to subsequently insert the straight section of the bracket into the paint roller.

Fig. 1

einen Haltebügel mit einem Griff,

Fig. 2

eine perspektivische Explosionsansicht einer Farbwalze,

Fig. 3

eine perspektivische Schnittansicht gemäß Fig. 2,

Fig. 4

eine perspektivische Schnittansicht gemäß dem Ausschnitt D in Fig. 3,

Fig. 5

eine Seitenansicht der Farbwalze,

Fig. 6

eine Draufsicht gemäß Fig. 5,

Fig. 7

eine Schnittansicht gemäß der Schnittlinie A - A in Fig. 5,

Fig. 8

eine perspektivische Schnittansicht gemäß Fig. 7 und

Fig. 9

eine vergrößerte Detailansicht gemäß dem Ausschnitt B in Fig. 7.

An exemplary embodiment of the invention is explained in more detail below with reference to the drawings. Show it

1

a holding bracket with a handle,

2

an exploded perspective view of an inking roller,

3

a perspective sectional view according to FIG 2 ,

4

a perspective sectional view according to the detail D in 3 ,

figure 5

a side view of the paint roller,

6

according to a plan view figure 5 ,

7

a sectional view according to section line A - A in figure 5 ,

8

a perspective sectional view according to FIG 7 and

9

an enlarged detail view according to section B in 7 .

1 shows a headband 1, at one end of which a handle 2 is provided. The other end of the bracket 1 defines a straight section 3. The arrow indicates the direction in which the straight section 3 is inserted into an inking roller.

the Figures 2 to 9 show a paint roller in detail. The inking roller is formed by a roller body 4. This is, for example, a tube made of plastic, on the outside of which there is a covering for receiving ink. The roller body 4 has two opposite open ends. An end piece 5 is inserted into each of the open ends, preferably exclusively by friction. The end piece 5 is expediently made of injection molded plastic. Like in particular 4 As can be seen, the end piece 5 has a central opening for passing through the straight section 3 of the retaining clip 1 (not shown here). Furthermore, the end piece 5 has a tubular section 7 which, in the mounted state, extends in the axial direction toward the interior of the roller body 4 .

Reference number 8 designates a clamping sleeve which is advantageously made of injection-moulded plastic. The reference numeral 9 designates a connecting tube, which is also made of, preferably extruded, plastic.

The end piece 5 and its interaction with the connecting tube 9 and the clamping sleeve 8 are in 9 shown in detail.

The end piece 5 is inserted into the roller body 4 . To limit the depth of insertion into the roller body 4, the end piece 5 has a circumferential flange 10. The end of the connecting tube 9 is inserted into the tube section 7 .

The pipe section 7 has a first section A1 with a first inside diameter I1. A second section A2, which has a second inner diameter I2, extends from this in a direction toward the interior of the roller body 4. The second inner diameter I2 is larger than the first inner diameter I1. A stop surface AF is formed at the boundary of the first section A1 and the second section A2.

The first inner diameter I1 is larger than a diameter D of the opening 6. A first support surface S1 for supporting the clamping sleeve 8 is formed on the opening 6.

A third inner diameter I3 of the connecting pipe 9 is smaller than an outer diameter DA of the collet 8. As a result, one end of the connecting pipe 9 inserted into the pipe section 7 forms a second support surface S2 for supporting the collet 8 in the axial direction.

A length L of the clamping sleeve 8 is smaller than a length of the first section A1. The outside diameter DA of the clamping sleeve 8 is smaller than the first inside diameter I1. As a result, the collet 8 is rotatably accommodated in the first portion A1.

Although the end pieces 5 and the connecting tube 9 can be connected to one another, for example by means of adhesive, welding or the like, it is considered to be particularly advantageous if the aforementioned components are only connected to one another by friction.

For this purpose, the end pieces 5 are each held in the roller body 4 by friction with a first clamping force K1. The two ends of the connecting pipe 9 are each held in the pipe section 7 in a frictionally engaged manner with a second clamping force K2. Each of the two clamping sleeves 8 is frictionally held with a third clamping force K3 on the straight section 3 of the bracket 1 (not shown here). The clamping forces K1, K2 and K3 are chosen so that the following relationship applies: $$\mathrm{<figure-callout\; id="1"\; label="K"\; filenames="imgf0001.png,imgf0008.png"\; state="\{\{state\}\}">K</figure-callout>}1+\mathrm{<figure-callout\; id="2"\; label="K"\; filenames="imgf0001.png,imgf0008.png"\; state="\{\{state\}\}">K</figure-callout>}2>2\times \mathrm{K}3.$$

As a result, the straight portion 3 can be inserted into the ferrules 8 or pulled out from the ferrules 8 without the end pieces 5 detaching from the roller body 4 .

The desired different clamping forces are determined by the selection of the diameters of the clamped components. For this purpose, the end pieces 5 have a slightly larger outside diameter than the inside diameter of the roller body 4 . The oversize can be about 1%, for example, resulting in the clamping force K1. The clamping force K2 is defined analogously by the choice of the outside diameter of the ends of the connecting pipe 9 and the inside diameter of the pipe section 7 . The outside diameter of the ends of the connecting pipe 9 is larger than the inside diameter of the pipe section 7. Finally, the clamping force K3 is determined by the selection of the outside diameter of the straight section 3 of the bracket 1 and the inside diameter of the clamping sleeves 8. The inside diameter of the clamping sleeves 8 is selected to be slightly smaller than the outside diameter of the straight section 3, resulting in the desired frictional connection and the clamping force K3. the diameters are selected in such a way that the above ratio of the clamping forces is maintained.

The proposed construction allows for easy assembly. In addition, the end pieces 5 are designed in such a way that they can be produced using a simple injection molding tool. The roller body 4 and the connecting pipe 9 can be made of extruded plastic pipes which are inexpensive to produce. The overall result is a particularly simple and cost-effective construction.

Reference List

1

mounting bracket

2

Handle

3

straight section

4

roller body

5

tail

6

breakthrough

7

pipe section

8th

collet

9

connecting tube

10

flange

A1

first section

A2

second part

AF

stop surface

I1

first inner diameter

I2

second inner diameter

I3

third inner diameter

THERE

outer diameter

D

diameter

L

length

S1

first support surface

S2

second support surface

K1

first clamping force

K2

second clamping force

K3

third clamping force

Claims (9)

paint roller with a holding bracket (1), at one end of which a handle (2) is provided and a straight section (3) delimited by the other end, on which a cylindrical roller body (4) is rotatably held, one end piece (5) being inserted into each open end of the roller body (4), each end piece (5) having a central opening (6) for the passage of the straight section (3) of the holding bracket (1), a tube section (7) extending in the axial direction from each end piece (5) towards the interior of the roller body (4), the pipe sections (7) of both end pieces (5) being connected by means of a connecting pipe (9), wherein the pipe section (7) has a first section (A1) with a first inner diameter (I1) and a second section (A2) with a second inner diameter (I2) which is larger than the first inner diameter (I1), and a first support surface (S1) for axially supporting a clamping sleeve (8), characterized in that a stop surface (AF) for limiting an insertion depth of an end of the connecting pipe (9) is formed on an inside of the pipe section (7) at a predetermined axial distance from the first support surface (S1), a third inner diameter (I3) of the connecting pipe (9) is smaller than an outer diameter (DA) of the clamping sleeve (8), so that one end of the connecting pipe (9) inserted up to the stop surface (AF) has a second support surface (S2) for axially supporting the clamping sleeve (8), and an axial length of the first section (A1) is greater than a length (L) of the collet (8), and the outer diameter (DA) of the collet (8) is smaller than the first inner diameter (I1) of the pipe section (7) and larger is as a diameter (D) of the opening (6), so that the clamping sleeve (8) is rotatably held in the first section (A1). Paint roller according to Claim 1, in which the first inner diameter (I1) is greater than the diameter (D) of the opening (6), so that the first supporting surface (S1) projecting radially inwards and encircling the opening (6) for supporting a clamping sleeve (8 ) is formed. Paint roller according to one of the preceding claims, in which the end piece (5) has a peripheral flange (10) for limiting an insertion depth into the roller body (4). Paint roller according to one of the preceding claims, in which the end piece (5) is held in the roller body (4) by friction with a first clamping force (K1). Paint roller according to one of the preceding claims, in which the end of the connecting tube (9) is held in the tube section (7) by friction with a second clamping force (K2). Paint roller according to one of the preceding claims, wherein the clamping sleeve (8) is frictionally held with a third clamping force (K3) on the straight section (3) of the bracket (1). Paint roller according to one of the preceding claims, wherein the clamping forces are selected so that the following relationship applies: $$\mathrm{K}1+\mathrm{K}2>\mathrm{n}\times \mathrm{K}3,$$

where n is the number of ferrules. Method for assembling the paint roller according to one of the preceding claims, comprising the following steps: a) providing an assembly rod and a support surrounding the assembly rod for supporting an end piece (5), b) successive plugging onto the assembly rod an end piece (5), a clamping sleeve (8), the connecting pipe (9), optionally the other clamping sleeve (8), of the roller body (4) and of the other end piece (5) and c) exerting a pressure on the end pieces (5), so that a frictional connection between the end pieces (5) and the roller body (4) and is formed between the connecting pipe (9) and the pipe sections (7) of the end pieces (5). Method according to Claim 8, in which the straight section (3) of the holding bracket (1) is used as the mounting rod.

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