EP2213414B1 - Wide-wheel grinding machine - Google Patents

Description

The invention relates to a wide grinding machine, in particular a wide-belt sanding machine for machining surfaces of particular flat, planar components, for. B. of wood or wood materials, with the features of the preamble of claim 1. Such a machine is made EP-A-0 127 760 known.

Wide grinding machines for processing surfaces of particular flat, planar components made of wood or wood-based materials, metal plates, plates made of plastic or rubber or paper webs have established themselves as an independent genus of grinding machines. They are contained in a machine stand (as used eg in the WO-A-00/38882 the applicant is disclosed) one or more grinding heads, each with a grinding belt which endlessly revolves around a grinding roller and a tensioning roller. The at least one grinding head and its drive motor is attached via a cross member on the machine stand. The drive motor is attached to one end of the cross member and at the opposite end a detachable connection for the grinding head is provided to loosen the sanding roller and replace the sanding belt, in particular during belt wear. In the prior art, the release of the connection is complex and the sanding roller must be supported here.

From the DE-A-10158711 a device for releasably locking of roll neck of rollers of a rolling stand is known in which with a displaceable drive coupling sleeve by means radially displaceable in the wall guided locking bolt which acted upon by, supported in the coupling sleeve spring elements, with their, the roll neck facing ends in, arranged in this Riegelausnehmungen on and ausbringbar is. This should allow a secure coupling of roll neck and drive coupling sleeve, as well as easy release of the connection.

The invention has for its object to provide a wide grinding machine, in particular a wide-belt sanding machine for machining surfaces of particular flat, planar components, for. B. wood or wood materials to create a simple and secure locking and unlocking of the sanding roller resp. allows easy changing an abrasive belt.

The object is solved with the features of claim 1. A rotatable beam with locking elements at its ends allows automated locking and unlocking of the sanding roller, respectively. the grinding head and a simple change of the sanding belt.

Preferred embodiments of the wide grinding machine are disclosed in the dependent claims.

Preferably, the wide grinding machine comprises at least one double unit with two grinding heads in the machine stand. The number of double units can be extended as desired, in particular to 2-5 double units, which are arranged one after the other, it also being possible for two double units to be arranged in one machine stand.

Fig. 1:

eine Breitschleifmaschine mit einer Doppeleinheit,

Fig. 2:

eine Doppeleinheit gemäss Fig. 1 mit offener Verriegelung,

Fig. 3:

eine Doppeleinheit gemäss Fig. 1 mit geschlossener Verriegelung,

The invention will be described in detail in an embodiment with reference to a drawing. In the drawing show the

Fig. 1:

a wide grinding machine with a double unit,

Fig. 2:

a double unit according to Fig. 1 with open lock,

3:

a double unit according to Fig. 1 with closed lock,

A wide grinding machine comprises at least one double unit 10 in a machine stand 11, the double unit 10 comprising two grinding heads, one upper and one lower. Each grinding head comprises a grinding roller 12 and a tensioning roller 13 spaced therefrom, the rollers 12, 13 being looped around by an endlessly circulating grinding belt 14. In addition, the grinding rollers 12 are arranged opposite each other to form a gap, so that the gap can be traversed by a chipboard or the like to be ground in the usual way. On a cross member 15 of the machine stand 11, a bearing 16 for a bar-shaped latch 17 for locking the grinding roller 12 is arranged. The latch 17 is rotatably mounted in the bearing 16. The ends 18 of the bolt 17 are shaped to be in embrace the locking position fittings 19. Preferably, the ends of the bolt can also be clamped with hydraulic cylinders. It arises in now closed state with the bolt 17 and the machine stand 11, a re-closed system in which the process forces are optimally absorbed and discharged into the foundation.

In the open position of the bolt 17, the ends 18 in the direction of the grinding roller 12 respectively. the tension roller 13, so that the abrasive belt 14 can be easily changed.

Reference numerals:

10

double unit

11

machine stand

12

grinding roll

13

tension roller

14

sanding belt

15

crossbeam

16

camp

17

bars

18

The End

19

fitting

20

hydraulic cylinders

Claims (3)

1. Wide grinding machine, in particular a wide-belt grinding machine for machining surfaces of in particular plane, flat elements, for example of wood or wood-based materials, comprising a machine stand (11) having a cross-member (15) forming at least one double unit (10) with two grinding heads, a grinding head comprising a grinding roller (12) and a tensioning roller (13), around which a grinding belt (14) is arranged in a continuously encircling manner, a locking bolt (17) for locking the grinding head being arranged between the machine stand (11) and the grinding head,
   characterized in that the bar-shaped locking bolt (17) having locking elements at its ends (18) rotatably arranged on a cross-member (15) of the machine stand (11) and in the open position provides access for changing the grinding belt.
2. Wide-belt grinding machine according to claim 1, characterized in that the locking bolt (17) at its ends (18) is shaped so that the ends (18) in the locking position engage around shaped pieces (19) of the machine stand (11).
3. Wide-belt grinding machine according to one of claims 1 or 2, characterized in that the locking bolt (17) is firmly clamped at its ends (18) in the closed state by means of a hydraulic cylinder (20).

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