DE202008009200U1 - Portal device for loading logs into a furnace - Google Patents

Abstract

contraption for the automatable collection of logs from one Bed of logs, for moving the logs picked logs to a depository and for the Laying these logs at the deposit for the purpose of supplying the Logs to a furnace, characterized in that the Device arranged from one above the bed Portal device (1), on the trolley (1.7) to a detachable Grasping a small subset of logs more suitable, by machine drivable, controllable gripper (2) arranged vertically movable is, exists.

Description

The The invention relates to a device for feeding logs from a disordered bed to a furnace.

There are some devices are known which are able to automatically according to the control signals from a heating control, automatically supply logs to a firing if necessary. As examples are the US 4,444,538 , the US 4,688,544 and the DE 3537841 A1 called. However, with these feeders, the logs must already be lined up and in an orderly position. This arranging is associated with a lot of work. For reasons of space, only the wood requirement for a relatively short heating time can always be provided in an orderly manner.

usual Separation devices for general cargo, in which at the same time a large number of pieces, for example over a conveyor belt or a vibrating conveyor, be moved and while moving at narrowing points is isolated, are for space and / or cost reasons very often not usable.

The The object underlying the invention is a device to create which automatable logs from a disorderly Collect the bulk of it individually, move it and put it in a defined position Place can place. Compared to known devices the device to be created have less space and they should be produced at lower cost, mountable and in their function be sustainably.

To the Solving the problem is a portal device as Manipuliervorrichtung used, which over the bed of logs is arranged. At the in two horizontal, normal to each other standing coordinate directions movable trolley of the portal device is vertically adjustable a gripper arranged.

in the Operation is - for example, controlled according to a preprogrammed starting pattern - the open gripper through the trolley to a point above the bed moved, lowered until it touches the bed, closed, so that he holds one or more pieces of wood, raised to the feed opening the furnace was driven and discharged. At the feed opening If necessary, a short auxiliary device can be attached which is the freight brought by the portal device if necessary separated into individual logs and / or Aligning the logs arranged. This auxiliary device can for example, be a funnel, which is shaken, or a short, maybe equally jarring one Conveyor belt, which is provided with baffles or a Vibratory conveyor arranged on which baffles are. Also, the use of a funnel with non-shaken Conveyor belt and side baffles for aligning the Holzscheites is purposeful. What is chosen is significantly dependent on the wood structure.

1 : shows a vertical sectional view of a device according to the invention. Only those rails of the gantry device, which in this representation are normal to the image plane running thereby cut.

This in 1 illustrated portal device 1 is in principle a very easily built gantry crane. On mounting parts 1.1 are the aligned in the X direction rails 1.2 attached. On these run a total of four roles 1.3 on which the frame 1.4 is attached, which in turn in the Y direction (in 1 normal to the image plane) aligned running rails 1.5 wearing. On these rails 1.5 runs on rollers 1.6 the trolley 1.7 , This carries a lifting device 1.8 which has a strap 1.9 the gripper 2 height adjustable wears.

mechanical Construction, power supply and position control of portal devices are so well known in the art from other applications, that does not need to be discussed in detail here.

At the This application is particularly important on the portal device advantageous that in the light embodiment which sufficient here, really mountable in any room is that it is very cost effective and is sturdy and that it is in the delivery of logs not in the danger zone. To a lower height To achieve, can also be rollers with vertical axis of rotation be provided.

In the in 1 sketched example is a gripper 2 provided, which individually to be seized logs with a trained as a pointed expiring self-tapping screw thread holding part 2.2 , which is mechanically driven, sums. The shape of the thread crest of the holding part can, for example, be taken over by conventional chipboard screws or by traditional wood splitting tools. This can be better than with the usual pincer-like grippers to ensure that only one log is taken. In principle, however, the usual pincer-like grippers are applicable.

• • Der leere Greifer befindet sich über der Schüttung aus Holzscheiten. Die übergeordnete Anlagensteuerung gibt den Befehl, ein Holzscheit aufzunehmen und an die Übergabestelle für die Ofenbeschickung zu verfrachten.
• • Der Greifer wird langsam abgesenkt, bis er mit der Spitze des Halteteiles an ein Holzscheit stoßt. Das Anstoßen wird durch eine Sensorik erkannt. Die Abwärtsbewegung wird gestoppt, die Spitze des Halteteiles liegt etwa mit der Gewichtskraft des Greifers an einem Holzscheit an. (Für den Fall, dass sich kein Holzscheit unter dem Greifer befindet, sollte die Abwärtsbewegung bei einem unteren Maximalwert, bei dem die Spitze des Halteteils noch nicht am Boden anstößt, durch die Steuerung rechtzeitig abgebrochen werden.)
• • Der Halteteil 2.2 wird durch einen Motor um seine Achse derart gedreht, sodass sich seine Gewindespitze in das Holzscheit hinein bohrt.
• • Sobald die Gewindespitze des Halteteils ausreichend weit in das Holzscheit eingedrungen ist, wird die Drehbewegung gestoppt.
• • Der Greifer mit dem an ihm fixierten Holzscheit wird durch das Portalgerät angehoben und in die Entladeposition gefahren.
• • Der Halteteil wird in die entgegengesetzte Richtung gedreht, sodass die Gewindespitze des Halteteils und das Holzscheit außer Eingriff geraten. Das vereinzelte Holzscheit fällt von der durch die Koordinatenposition des Greifers definierten Position nach unten.
• • Der leere Greifer wird in die Ausgangsstellung zurückgefahren. Ende des Arbeitszyklus'.

The essential parts of the device are explained below with reference to a functional cycle:

• • The empty grab is located above the pile of logs. The parent Anla Gene control gives the order to pick up a log and transport it to the transfer point for the kiln feed.
• • The grapple is lowered slowly until it hits a log with the tip of the retainer. The abutment is detected by a sensor. The downward movement is stopped, the tip of the holding member is approximately on the weight of the gripper on a log. (In the event that there is no log under the grapple, the downward movement should be stopped in a timely manner by the control at a lower maximum value at which the tip of the retainer does not abut the ground yet.)
• • The holding part 2.2 is rotated by a motor around its axis so that its threaded tip drills into the log.
• • As soon as the thread crest of the holding part has penetrated sufficiently far into the log, the rotation is stopped.
• • The gripper with the wooden log fixed to it is lifted by the portal device and moved to the unloading position.
• • The holder is turned in the opposite direction so that the threaded tip of the holder and the log are disengaged. The isolated log falls down from the defined by the coordinate position of the gripper position.
• • The empty gripper is moved back to the starting position. End of the work cycle '.

logs can with this device simply a fully automatic controlled firing for solid fuels become. For this purpose, only the dropping or depositing point to usual, from the top feedable feeders or feeders for a few solid pieces of fuel at the firings be placed.

If a gripper, such as. B. a so-called. Holzgreifer, as he especially from Forestry is well known, is not used it is ensured that only one log is caught and if more logs can be taken than the firing be fed at the same time, or if the logs have to have some direction for them to go through the supply port can enter the furnace, it is necessary to install an auxiliary device between the depository and the furnace the logs separated and / or in the correct orientation brings. Due to the fact that each working cycle of the gantry device anyway brought only a very small amount of logs This auxiliary device can be small and simple and therefore too be carried out inexpensively. There are one Fullness of technical solutions for such auxiliary devices well known why it will not be discussed further here. The Designing the control of the device, in particular setting the Sequences in the event that individual steps fail, is quite within the framework of the existing expert Knowledge of control engineers manageable, so here will not be discussed further.

For the automatable collection of logs from a bed of logs, for moving the collected logs to a depository and for storing these logs at the deposit for the purpose of supplying the logs to a furnace is so moved that logs from the bed by a machine driven, controllable gripper ( 2 ), which on the trolley ( 1.7 ) a gantry device arranged above the bed ( 1 ) is arranged vertically movable and that the collected logs with the gripper raised by the portal device, moved to the depositing point and released there.

In In a particular embodiment, the contact of the gripper with a log in the bed detected and thereby the grasping of the gripper is triggered.

In a particular embodiment, the approach of the trolley ( 1.7 ) to a location above the bed to accommodate a subset of logs in accordance with a preset pattern.

In a particular embodiment, the approach of the trolley ( 1.7 ) to a location above the bed to accommodate a subset of logs in accordance with a sensory-controlled drain.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• US 4444538 [0002]
• - US 4688544 [0002]
• - DE 3537841 A1 [0002]

Claims (4)

Device for the automated collection of logs from a bed of logs, for moving the collected logs to a depositing point and for storing these logs at the deposit for the purpose of supplying the logs to a furnace, characterized in that the device consists of a over the bed arranged portal device ( 1 ), on whose trolley ( 1.7 ) a mechanically drivable, controllable gripper suitable for releasably gripping a small subset of logs ( 2 ) is arranged vertically movable. Device according to claim 1, characterized in that that the portal device is provided with a sensor which when lowering the gripper, the stop on the bed detected. Apparatus according to claim 1 or 2, characterized in that it is provided with a control program in which the approach pattern for starting the trolley ( 1.7 ) is stored at a location above the bed to accommodate a subset of logs. Device according to one of the preceding claims, characterized in that between the depository of the portal device and the supply port to the furnace an auxiliary device for separating and / or arranged aligning the stored by the gripper Wooden logs is arranged.