DE29515309U1 - Insert device for boards - Google Patents

Description

KÖHLER SCHMID + PARTNER '""'"

PATENT ATTORNEYS

KÖHLER SCHMID + P. RUPPMANNSTR. 27 D-70565 STUTTGART

20 837 S/nl

Inland Constructions GbR Wiesäcker 4 74182 Obersulm

Karl Strähle Mechanical engineering Robert-Bosch-Straße 11 73265 Dettingen/ Teck

Insertion device for boards

The invention relates to an insertion device for panels, in particular metal panels, in processing machines such as painting or printing machines. It is of fundamental importance that the panels are correctly positioned and inserted into the machine. A number of such insertion devices are already known, whereby the panels are transported either on continuous rollers or on endless conveyor belts, namely chain drives. Both designs, however, have the disadvantage that the individual transport elements are extremely heavy and therefore require very high drive power.

The object of the present invention is to create insertion devices according to the generic term of the main claim, which are simply constructed, contain light transport elements and thus require lower drive forces.

According to the invention, the endless conveyor belts are designed as toothed belts for this purpose and the pusher elements arranged on them are fastened by webs or the like that engage under the tooth gaps. Such toothed belts are very light and, especially if they are made of plastic, extremely cost-effective. The pusher elements can also be made of plastic and their fastening by means of webs that engage under the tooth gaps is very easy to accomplish.

Preferably, the webs are arranged with longitudinal play in the tooth gaps, so that when the toothed belt is deflected on the gears, the thrust links have a certain amount of play on the toothed belt and thus unwanted jamming is avoided.

According to a further feature of the invention, the gears have recesses on their circumference, the circumferential length of which corresponds at least to the external distance between the webs of a thrust member, the ratio of the number of teeth of the toothed belts and the gears being adjusted so that the webs of the thrust members each lie in the recesses. In order to achieve this with certainty, the number of teeth of the toothed belts can be divided by that of the gears.

The thrust links are expediently provided with sliding blocks, which are supported on longitudinal webs and/or on the rims of the gears. This ensures that the thrust links are always at approximately the same height and the plates cannot slip over the thrust links. To guide the toothed belts laterally, they expediently have a longitudinal groove into which the webs of the gears engage.

According to a further feature of the invention, the thrust members have drivers that can be moved longitudinally against the spring force acting in the thrust direction. These are provided with a centering stop at the front when viewed in the thrust direction, with the thrust members having a corresponding recess. This ensures that the drivers are always centered relative to the thrust members. In order to prevent the drivers from making point contact with the panels and thus denting them, the drivers have a flat surface as a plate system.

The drawing shows an embodiment of the invention. It shows:

Fig. 1 a cross section through a slide-in device,

Fig. 2 a broken top view of a toothed belt with thrust link,

Fig. 3 is a partially sectioned rear view according to Fig. 1.

The insertion device consists of two gear pairs 1, 2, which are each arranged in pairs on a continuous shaft 3. The drive of the gears is not shown. Endless conveyors 4 designed as toothed belts are arranged on the gear pairs 1, 2, which engage with the teeth of the gears ₁ , 2. Push members 5 are attached to the toothed belt 4 by webs 6 which engage under the toothed belt 4 and are each arranged in the tooth gaps 7. The diameter of the webs 6 is significantly smaller than the width of the tooth gaps 7 , so that no jamming occurs when the toothed belt 4 is deflected on the gear pairs 1, 2. The gear pairs 1, 2 have recesses 8 on their circumference, the circumferential length of which corresponds at least to the diameter of the webs 6 of the push member 5. Otherwise, the webs would come to rest on the teeth and the toothed belt 4 would be stretched too much or would jam. In addition, the ratio of the number of teeth of the toothed belt 4 and the gear pairs 1, 2 must be adjusted so that the webs 6 also come to rest in the recess 8. This is achieved in particular by the number of teeth of the toothed belt 4 being divisible by that of the gears 1, 2.

The pusher members 5 are provided with sliding blocks 9 on the sides, which are supported in the grooves of longitudinal webs 10. This prevents the toothed belts 4 from sinking together with the pusher members 5 and the plates to be conveyed (not shown) from possibly being introduced in an inclined position. To prevent the toothed belts 4 from slipping off the gear pairs 1,

2 with certainty, the toothed belts 4 have a longitudinal web 11 for engagement in a groove 12 of the gear pairs 1, 2. It is of course also possible to carry out this arrangement the other way round, so that webs of the gear pairs 1, 2 engage in grooves of the toothed belts 4.

The push members 5 have longitudinally displaceable carriers 13 which are loaded in the direction of thrust 14 by a spring 15. The carriers 13 are in turn provided with a centering stop 16 which interacts with a corresponding recess 17 in the push member 5 so that the carriers 13 are always aligned centrally. In order to prevent the workpieces to be conveyed which are not placed there from being pressed in, the carriers 13 have a flat surface 18 as a contact.

Claims (9)

20 837 S/nu claims 1. Insertion device for panels, in particular metal panels in processing machines with one or more endless conveyor belts deflected by gear wheels with pusher elements attached to them for the panels, characterized in that the endless conveyor belts are designed as toothed belts (4) and the pusher elements (5) arranged on them are attached by webs (6) or the like which engage under the toothed belts (4) in the tooth gaps (7).5 2. Device according to claim 1, characterized in that the webs (6) are arranged with longitudinal play in the tooth gaps (7). 3. Device according to one of the two preceding claims 1 or 2, characterized in that the gears (1, 2) have recesses (8) on their circumference, the circumferential length of which corresponds at least to the diameter of the webs (6) of a thrust member (5), the ratio of the number of teeth of the toothed belts (4) and the gears (1, 2) being adjusted so that the webs (6) of the thrust members (5) each come to lie in the recesses (8). -&Igr;&Agr;. Device according to claim 3, characterized in that the number of teeth of the toothed belt (4) is divided by that of the gear wheels (1, 2). 5. Device according to one or more of the preceding claims, characterized in that the thrust members (5) are provided with sliding blocks (9) which are supported on longitudinal webs (10) and/or on wheel rims of the gear wheels. 6. Device according to one or more of the preceding claims, characterized in that the toothed belts (4) for lateral guidance have a longitudinal web (11) for engagement in grooves (12) of the gear wheels (1, 2) or vice versa. 7. Device according to one or more of the preceding claims, characterized in that the thrust members (5) have longitudinally displaceable drivers (13) against the spring force (15) acting in the thrust direction. 8. Device according to claim 7, characterized in that the drivers (13) have a centering stop (16) at the front when viewed in the thrust direction and the thrust members (5) have a corresponding recess (17). 9. Device according to one or both of the preceding claims 7 and 8, characterized in that the drivers (13) have a flat surface (18) as a plate system.