DE8623326U1 - Pneumatic sanding roller - Google Patents

Description

RICHARD SCHLEE Dipwng. PATENT LAWYERS

ARNEMISSLING Dipl.-Ing. ο (0641) 71019. 63 Giessen

29.O8.1986
Mi / V 86 225GM

Peter Baudach and Gerd Baudach. Am Lehnköppel 3-5, 63Ol Rabenau

Pneumatic sanding roller

The invention relates to a pneumatic grinding roller a drive shaft and two end pieces connected to the drive shaft in a rotationally fixed manner, which are connected to one another via a center piece are connected and with an inflatable tube section pushed over the middle piece, with the end pieces a valve is inserted.

Pneumatic grinding rollers of the type mentioned are always used in particular when curves, depressions, Edges, especially sharp-edged corners, should be sanded. That on the pneumatic sanding roller The applied ring-shaped sandpaper is printed into the respective corners by the resilient pad, whereby also sharp-edged corners can be sanded without that Paper will be destroyed instantly.

Pneumatic grinding rollers, which have an injection molded body, are known made of plastic, which is formed from a central middle piece with a smaller diameter and two end pieces with a larger diameter. On this plastic body, a hose section is made from a

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Rubber applied, with this section of tubing a little over
the side windows protrudes. This rubber jacket comes with
its ends bent inwards over the side pieces and
clamped by means of a plate on the inside of these side pieces, this plate with many screws
is screwed to the side pieces. To inflate the

A valve inserted in the end pieces serves for the hose, 1

Via the compressed air, the space between the rubber jacket and the I.

Side pieces is fed. The disadvantage of this well-known j |

pneumatic grinding roller consists in the fact that this only starts with |

can be inflated at a relatively low pressure, since I

a higher pressure does not prevent the Klemmeciianismus fj

can that the ends of the rubber jacket from the clamping point fjj

jump out. Another disadvantage of the known pneuma- §

table grinding roller consists in the fact that the rubber jacket over J

the side pieces is pulled away so that in the area S

the side pieces result in different grinding ratios than in yes

the middle of the roll. Moreover, it is also extremely | J

awkward to roll the rubber jacket with the well-known sanding rollers %

to exchange. f

The invention is based on the object of a pneumatic;

To train the grinding roller of the type mentioned in such a way that |

this is easy to set up and therefore inexpensive in the I '

Production is where there is no longer any risk of f-

if there is an increased pressure in the hose, this with its ends |

can slip out of the clamping points and which significantly |

is easier and faster to assemble. ;

This object is achieved according to the invention in that the I.

Sanding roller made of two i

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has section-formed spacer sleeve which is fixed concentrically to the bores in the discs, that the hose section is pulled with its ends over the front edges of the spacer sleeve and the washers and the spacer sleeve are clamped together by means of a screw pushed through the bores of the discs, which at the same time the Forms drive axis. .

There is a pneumatic grinding roller according to the invention thus essentially consisting of four simple parts, namely the two washers, a spacer sleeve and a screw, which presses the discs and the spacer sleeve together, with a tube section with its ends between the Discs and the spacer sleeve is clamped, so that a closed space is obtained. I one of the discs the valve is arranged so that the hose section can be inflated. The advantage of this arrangement is there in that by the frontal compression of the hose section between the spacer sleeve and the discs a secure hold is given, this hold can be further improved in that a Annular groove is incorporated into which the spacer sleeve engages. A grinding sleeve is placed over this hose section pushed, which extends over the entire width of the grinding roller, so that outward through this grinding roller an additional support for the inflated hose section takes place over its entire width, with the end faces of the hose section on the disks prop up. As a result, the same grinding ratios are obtained over the entire width of the grinding roller, with the Pressure in the hose section within the strength of the

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Pressure in the hose section varies as required within the framework of the strength of the grinding sleeve and the respective given, units can be customized.

Further advantageous refinements of the invention emerge from the subclaims in conjunction with the description and

An embodiment of the invention is based on the following of the drawing, which shows a longitudinal section through a pneumatic grinding roller according to the invention.

The grinding roller 1 consists of two disks 2, 3, between which a spacer sleeve 4 with holes 5 is clamped. The discs 2, 3 have central holes 6, 7 through which a screw 8 engages. The screw 8 has a screw head 9 which rests on the outside of the disk 2. Between A seal 10 is arranged for this and the disk in order to seal the space 11 in a pressure-tight manner. On the threaded part 12 another screw 13 is screwed on, by means of which the two washers are pressed against the spacer sleeve 4 are held. The end 14 of the screw 8 is turned off smoothly so that it can be inserted into chucks, e.g. chucks from Drills, can be clamped.

In the one disc 3, a valve 15 is inserted, with which the space 11 can be supplied with compressed air.

On the clamping sleeve 1, a hose section 16 is attached, the ends 17, 18 over the front ends 19, 20 of the Spacer sleeve 4 are pulled. When bracing the panes 2,

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3 and the spacer sleeve 4, the ends 17, 18 d (Js hose section 16 are pressed against the disks 2, 3. In the area of the spacer sleeve, an annular groove 21, 22 is formed in each of the disks 2, 3, on the one hand for centering; the Spacer sleeve 4 is used and, on the other hand, an immovable hold for the ends 17 ', 18 of the hose section • 1 α r * öf.T = 5 Vi · * · "1.

The assembly of the grinding roller is very simple by loosening a single screw 13, the hose section 16 advantageously being placed on the isolated spacer sleeve 4 is pushed on and then the spacer sleeve is reassembled and clamped.

Claims (3)

■ r, '6 * <· <Claims: 1. Pneumatic grinding roller with a drive shaft and two end pieces firmly connected to the drive shaft, the are connected to one another via a middle piece and with one inflatable one pushed over the middle piece S Hose section, with a valve inserted in the end pieces, characterized in that the grinding roller (1) Ϊ made of two washers with a central bore (5,6) (2,3) consists that the middle piece consists of a tube? section formed spacer sleeve (4), the concen- ! trically to the bores (5,6) in the disks (2,3) is fixed i that the hose section (16) with its ends (17,18) I pulled over the front edges (19.20) of the spacer sleeve (4) ί and the washers (2,3) and the spacer sleeve (4) by means of a screw (8) pushed through the bores (5, 6) of the disks (2, 3) are clamped together, which at the same time tig forms the drive axis. <
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; 2. Pneumatic grinding roller according to claim 1, characterized in that; indicates that ί annular grooves (21,22) for the engagement of the end faces of the I spacer sleeve (H) are formed in the inner sides of the disks (2,3). 3. Grinding roller according to claim 2, characterized in that the hose section (16) through the spacer sleeve (4) into the Annular grooves (21,22) in the disks (2,3) is kept pressed.