DE102017113956B4 - Device for sawing logs - Google Patents

Abstract

Device (100) for sawing logs of wood to a predeterminable length, with a feed drum (110) rotatably mounted about an axis of rotation (105) with a plurality of insertion shafts (120, 120 ', 120' ') delimited by means of a shaft bottom (200) of logs to be sawed, whereby by rotating the feed drum (110) an insertion shaft (120, 120 ', 120 ") enters the effective area of a fixed circular saw (130), and with an outlet opening () located in the conveyor path behind the circular saw (130) 131) for the removal of sawn-up logs, each insertion shaft (120, 120 ', 120' ') being divided in three into a first shaft part (140), a second shaft part (150), arranged upstream of the circular saw (130) in the direction of insertion of the wood logs the saw blade of the circular saw (130) engages and a third shaft part (160) arranged downstream of the circular saw, the first shaft part (140) being closed by a closed shaft wall (141) is encased and the third shaft part (160) is encased by a closed shaft wall (161) and has an opening (165) for ejecting sawn-off logs, the second shaft part (150) of at least one of the first shaft part (140) and the third shaft part (160) connecting web (151) is formed, which separates the first shaft part (140) from the third shaft part (160) in order to create a space for the saw blade of the circular saw (130) to engage, the first shaft part (140 ) is essentially triangular in cross section and a peripheral wall section (142) close to the periphery of the feed drum (110) adjoins two mutually opposing inner wall sections (143, 143 ') close to the axis of rotation (105) of the feed drum (110), wherein - The two inner wall sections (143, 143 ') close to the axis of rotation (105) of the feed drum (110) in the transition region in which they are adjacent to one another, each with a flange (144, 144 ') are provided and an extension of each flange (144, 144') in the direction of the third shaft part (160) forms a web (151) which connects the first shaft part (140) to the third shaft part (160), and wherein - The insertion shafts (120, 120 ', 120' ') are arranged laterally adjacent to each other at the same distance from the central axis of rotation (105) within the feed drum (110).

Description

The invention relates to a device for sawing logs of wood to a predeterminable length, with a feed drum rotatably mounted about an axis of rotation and having a plurality of insertion shafts delimited by means of a shaft bottom for inserting logs to be sawed, whereby an insertion shaft in each case into the effective range of a fixed one by rotating the feed drum Circular saw arrives, and with an outlet opening arranged in the conveyor path behind the circular saw for the removal of sawn-off logs.

Devices of the type mentioned are known in the prior art in a variety of different embodiments. However, the known devices have the disadvantage that they are composed of an unnecessarily large number of components and therefore an unnecessarily large amount of material is required for their production, which makes the production complex and expensive. In addition, the operation of such complex structures is prone to failure.

The publication DE 22 59 362 A discloses a machine for cutting profile pieces from sawable material into individual small sections or prismatic bodies, wherein in association with a sawing tool, a rotatable, usually drum-like support for guiding and carrying the profile pieces to be cut, an uninterrupted series of rings at uniform intervals around the There are vertically aligned hollow cylindrical or tubular, corona-forming cells attached to the longitudinal central axis of the carrier and there is an underlying continuous row of vertically aligned, hollow cylindrical or tubular, coronating cells, each coaxially aligned with one of the cells, and wherein There is a slot-shaped distance between the ring of cells and the ring of counter cells in the vertical direction, into which the sawing tool enters when the two rings in front of cells and counter cells are rotated from the carrier n.

From the publication DE 296 07 119 U1 is a sawing device for sawing split logs and logs up to a diameter of about 200 mm. In the sawing machine equipped with a circular saw, the wood to be processed is fed to the saw blade by means of a drum. The saw drum is arranged at an incline of 30 ° to 70 ° so that the wood falls down due to gravity and the rotary movement of the drum, for which purpose an adjustable base plate is provided as a length stop.

From the publication DE 20 2010 010 540 U1 A device for sawing firewood is known, in which a circular saw blade is attached in order to indicate a device which is improved compared to the prior art mentioned and which has a simple structure with little production outlay.

The publication EP 2 705 937 A1 discloses a sawing machine for logs, with a frame, a saw, which is provided upstream with a support device equipped with a motor drive for receiving batches of logs, these means being pivotably arranged between a rest position and a sawing position, and means are provided, to lead the cut batches to unloading, wherein a rotating support of a loading unit comprises a barrel which can be moved about the central axis and which consists of at least three elements which are arranged as an extension to one another: a first element which is provided as a wood receiving arrangement, a second element, which represents a cutting guide assembly and a third element which forms a telescopically constructed ejection assembly.

From the publication DE 20 2015 101 608 U1 A device for sawing logs to a predeterminable length is known, with a feed drum rotatably mounted about a central axis, with a plurality of insertion shafts delimited by means of a displaceable shaft bottom for inserting wooden logs to be sawed, whereby one insertion shaft in each case into the effective area of a by rotating the feed drum fixed circular saw can be brought, with an exit trough being arranged in the conveying path behind the circular saw, with a guide trough for conveying sawn-off logs such that the longitudinal axis of each log is aligned in the direction of the longitudinal axis of the guide trough in order to supply the logs to that of the guide trough ensure the lower end of a laterally swiveling conveyor belt.

The publication DE 20 2015 106 326 U1 discloses a device for sawing logs to a predeterminable length, with a feed drum rotatably mounted about a central axis and having a plurality of insertion shafts delimited by means of a shaft bottom for inserting logs to be sawed, wherein an insertion shaft can be brought into the effective area of a fixed circular saw by rotating the feed drum and with an outlet device arranged behind the circular saw for the removal of sawn-off logs, and wherein the feed drum contains a plurality of spaced-apart segments which pass in the direction of the central axis Slots of a predetermined width are separated from one another, a main segment being arranged in the feed direction of the logs in front of the circular saw and one or more additional segments being arranged in the feed direction of the logs behind the circular saw, and the width of the slots being dimensioned in order to be able to be releasably placed perpendicular to the central axis, the shaft floor panel forming the shaft floor, which can alternatively be placed behind one of the additional segments in order to create a shaft depth of variable length.

The publication EP 3 045 248 A2 discloses an elongate member cutting machine having a drum body defining one or more channels, a saw intercepting the channels to cut an elongate member housed in the respective channel as the drum body rotates in one direction, the saw and the drum body are each arranged in parallel and have fixed and spaced-apart axes of rotation, and a motor to set the drum body in rotation, wherein a connecting device is provided radially inside the channel to connect the drum body and the motor with the rotary movement.

The object of the invention is therefore to provide a device for sawing logs to a predeterminable length, the manufacture of which is simplified compared to the known devices and whose operation is more robust and safer than the known devices.

This object is achieved according to the invention by means of a device with the features of patent claim 1.

Preferred embodiments of the invention are the subject of the dependent claims.

In the device according to the invention, simplified production compared to the known devices is made possible, and the operation of the device according to the invention is more robust compared to the known devices, wherein in particular there is a simple possibility of sawing the logs to different lengths.

According to a first preferred embodiment of the device according to the invention, it is provided that all three wall sections are preferably formed by a one-piece unit which forms a self-contained shaft wall.

The two flanges in question are preferably combined into one unit.

The extensions of the flanges of the first shaft part are importantly arranged outside the cross-sectional area of the second shaft part in order to allow the saw blade of the circular saw to engage in the overall cross-sectional area of the second shaft part.

The third shaft part preferably has a cross section which corresponds essentially to the cross section of the first shaft part, a peripheral wall section of the third shaft part being formed as an extension of the peripheral wall section of the first shaft part and two adjacent inner wall sections of the third shaft part as an extension of the two inner ones Wall sections of the first shaft part are formed.

An opening for ejecting sawn-off logs of the third shaft part can alternatively also be from a missing peripheral, i.e. be formed by a missing wall section remote from the axis of rotation of the feed drum.

Importantly, the two inner ones, i.e. Wall sections of the third shaft part near the axis of rotation of the feed drum are also each provided with a flange in the transition region in which they adjoin one another, these flanges each being integrally connected to a relevant flange of the first shaft part via a web designed as an extension of the flanges of the first shaft part are.

According to a further preferred embodiment of the device according to the invention, the third shaft part is subdivided into successively arranged shaft parts which are separated from one another by gaps, in the region of the third shaft part a plurality of alternately arranged in the gaps perpendicular to the central axis of the third shaft part and insertable into the gaps Manhole floor panels are provided in order to form predetermined positions of a reversible, alternative to the manhole floor of a respective insertion shaft to saw logs of wood to different lengths.

Between two and five, in particular three, insertion shafts are preferably provided.

The insertion shafts are preferably oriented in the feed drum in such a way that when the saw blade of the circular saw is arranged in a right half of the feed drum when the feed drum rotates counterclockwise, the exit opening of the third shaft part sawn up logs above a conveyor belt arranged below the left half of the feed drum.

The respective two inner wall sections of the first shaft part which are close to the axis of rotation of the feed drum are preferably bent one or more times in order to form one or more corners in a predetermined position.

In particular, the peripheral wall section of the first shaft part that is distant from the axis of rotation of the feed drum is designed to be bent one or more times in order to form one or more corners in a predetermined position. These corners have the effect that a counter-pressure surface is formed for the logs to be sawn, which is oriented essentially perpendicular to the pressure exerted by the saw blade of the circular saw on a log in the process of sawing.

The two inner wall sections of the first shaft part can be connected to one another via a connecting wall in the transition region in which the two flanges are adjacent to one another in order to prevent unwanted penetration of thinner logs or of sawdust.

The two inner wall sections of the third shaft part can also be connected to one another for the same purpose in the transition region in which the two flanges are adjacent to one another, by means of a corresponding connecting wall.

• 1 eine bevorzugte Ausführungsform der erfindungsgemäßen Vorrichtung in einer teilweisen Querschnittsansicht;
• 2 die in 1 dargestellte bevorzugte Ausführungsform der erfindungsgemäßen Vorrichtung in einer Ansicht von oben;
• 3 die in 1 dargestellte bevorzugte Ausführungsform der erfindungsgemäßen Vorrichtung in einer Seitenansicht.

The device according to the invention is explained below with reference to a preferred embodiment, which is shown in the figures of the drawing. In it show:

• 1 a preferred embodiment of the device according to the invention in a partial cross-sectional view;
• 2nd in the 1 illustrated preferred embodiment of the device according to the invention in a view from above;
• 3rd in the 1 illustrated preferred embodiment of the device according to the invention in a side view.

The in the 1 to 3rd shown device according to the invention 100 for sawing logs to a predefinable length contains one about an axis of rotation 105 rotatably mounted feed drum 110 with a plurality of by means of a shaft floor 200 limited insertion shafts 120 , 120 ' , 120 '' for inserting logs to be sawn, by rotating the feed drum 110 one insertion slot each 120 , 120 ' , 120 '' in the effective area of a fixed circular saw 130 reached.

In a conveyor path behind the circular saw 130 is an outlet opening 131 arranged for the removal of sawn logs.

Every insertion shaft 120 , 120 ' , 120 '' is divided into three in the direction of insertion of the logs upstream of the circular saw 130 arranged first chess part 140 , a second part of the shaft 150 in which the saw blade of the circular saw 130 engages and a third shaft part arranged downstream of the circular saw 160 , the first part of the shaft 140 from a closed shaft wall 141 is covered and the third part of the shaft 160 from a closed shaft wall 161 is encased and an opening 165 for ejecting sawn logs.

The second part of the shaft 150 is the first part of the shaft 140 with the third part of the shaft 160 connecting web 151 formed the first part of the shaft 140 from the third part of the shaft 160 separates and a free space for engagement of the saw blade of the circular saw 130 forms.

The first part of the shaft 140 is essentially triangular in cross section, one of the periphery of the feed drum 110 near peripheral wall section 142 on two opposing inner ones, the axis of rotation 105 the feed drum 110 near wall sections 143 , 143 ' adjacent.

All three wall sections 142 , 143 , 143 ' are designed as a one-piece unit, which consists of a self-contained shaft wall 141 is formed.

The two inner ones, the axis of rotation 105 the feed drum 110 near wall sections 143 , 143 ' are each in the transition area in which they are adjacent to each other with a flange 144 , 144 ' provided an extension of each flange 144 , 144 ' towards the third part of the shaft 160 a footbridge 151 forms the first part of the shaft 140 with the third part of the shaft 160 connects.

The two flanges 144 , 144 ' are combined into one unit.

The extensions of the flanges 144 , 144 ' of the first part of the shaft 140 are outside the cross-sectional area of the second shaft part 150 arranged to engage the saw blade of the circular saw 130 in the overall cross-sectional area of the second shaft part 150 to enable.

The third part of the shaft 160 has a cross section which is essentially the cross section of the first shaft part 140 corresponds, with a peripheral wall section 162 of the third part of the shaft 160 in extension of the peripheral wall section 142 of the first part of the shaft 140 is formed and two adjacent inner wall sections 163 , 163 ' of the third part of the shaft 160 in extension of the two inner wall sections 143 , 143 ' of the first part of the shaft 140 are trained.

The two inner ones, the axis of rotation 105 the feed drum 110 near wall sections 161 of the third part of the shaft 160 are also in the transition area in which they adjoin each other with flanges 164 , 164 ' provided, and these flanges 164 , 164 ' each have an extension of the flanges 144 , 144 ' of the first part of the shaft 140 trained jetty 151 in one piece with a relevant flange 144 , 144 ' of the first part of the shaft 140 connected.

In the area of the third part of the shaft 160 is the third part of the shaft 160 in shaft parts arranged one behind the other 170 , 180 , 190 divided by spaces 175 , 185 are separated from each other, being in the region of the third shaft part 160 a plurality of perpendicular to the central axis of the third shaft part 160 arranged, in the spaces 175 , 185 insertable shaft floor panels acting as alternative shaft floors 210 , 220 are provided, a predetermined reversible positions to the shaft floor 200 alternative shaft floor of a relevant insertion shaft 120 to be sawn to saw logs of different lengths.

The three insertion shafts 120 , 120 ' , 120 '' are laterally adjacent to each other at the same distance from the central axis of rotation 105 inside the feed drum 110 arranged.

The insertion shafts 120 , 120 ' , 120 " are in the feed drum 110 oriented so that when the saw blade of the circular saw is arranged 130 in a right half of the feed drum 110 when the feed drum rotates 110 counterclockwise the outlet opening 131 of the third part of the shaft 160 sawn logs above one below the left half of the feed drum 110 arranged conveyor belt 190 releases.

The respective two of the axis of rotation 105 the feed drum 110 near wall sections 143 , 143 ' of the first part of the shaft 140 are bent to the corners in a given position 147 , 147` to train.

Also the peripheral, the axis of rotation 105 the feed drum 110 distant wall section 142 of the first part of the shaft 140 is bent to a corner in a given position 146 to train.

The corner 146 of the peripheral wall section 142 of the first part of the shaft 140 are arranged in order to form a counter pressure surface for the logs to be sawn, which is essentially perpendicular to that through the saw blade of the circular saw 130 applied pressure is aligned with a log in the process of sawing.

The two inner wall sections 143 , 143 ' of the first part of the shaft 140 are in the transition area where the two flanges 144 , 144 ' are adjacent to each other, via a connecting wall 145 connected with each other.

Also the two inner wall sections 163 , 163 ' of the third part of the shaft 160 are in the transition area where the two flanges 164 , 164 ' are adjacent to each other, via a connecting wall 165 connected with each other.

The exemplary embodiment of the invention explained above only serves the purpose of a better understanding of the teaching according to the invention, which is not limited as such by the exemplary embodiment.

Reference list

100 =

contraption

105 =

Axis of rotation

110 =

Feed drum

120, 120 ', 120' '=

Insertion shafts

130 =

circular saw

131 =

Outlet opening

140 =

first part of the shaft

141 =

Shaft wall

142 =

peripheral wall section

143, 143 '=

inner wall section

144, 144 '=

flange

145 =

Connecting wall

146 =

corner

147, 147 '=

Corners

150 =

second part of the shaft

151 =

web

160 =

third part of the shaft

161 =

Shaft wall

162 =

peripheral wall section

163, 163 '=

inner wall sections

164, 164 '=

Flanges

165 =

Connecting wall

170, 180, 190 =

Manhole parts

175, 185 =

Gaps

190 =

Conveyor belt

200 =

Manhole bottom

210, 220 =

Manhole floor panels

Claims (14)

Device (100) for sawing logs of wood to a predeterminable length, with a feed drum (110) rotatably mounted about an axis of rotation (105) with a plurality of insertion shafts (120, 120 ', 120' ') delimited by means of a shaft bottom (200) of logs to be sawed, whereby by rotating the feed drum (110) an insertion shaft (120, 120 ', 120 ") enters the effective area of a fixed circular saw (130), and with an outlet opening () located in the conveyor path behind the circular saw (130) 131) for the removal of sawn-up logs, each insertion shaft (120, 120 ', 120' ') being divided in three into a first shaft part (140), a second shaft part (150), arranged upstream of the circular saw (130) in the direction of insertion of the wood logs the saw blade of the circular saw (130) engages and a third shaft part (160) arranged downstream of the circular saw, the first shaft part (140) being closed by a closed shaft wall (141) is sheathed and the third shaft part (160) is sheathed by a closed shaft wall (161) and has an opening (165) for ejecting sawn-off logs, the second shaft part (150) of at least one of the first shaft part (140) and the third shaft part (160) connecting web (151) is formed, which separates the first shaft part (140) from the third shaft part (160) to create a space for engagement of the saw blade of the circular saw (130), wherein - The first shaft part (140) is essentially triangular in cross-section and a peripheral wall section (142) near the periphery of the feed drum (110) on two mutually opposing inner wall sections (143, near the axis of rotation (105) of the feed drum (110) 143 '), where - The two inner, the axis of rotation (105) of the feed drum (110) near wall sections (143, 143 ') in the transition region in which they are adjacent to each other are each provided with a flange (144, 144') and an extension of one each flange (144, 144 ') in the direction of the third shaft part (160) forms a web (151) which connects the first shaft part (140) to the third shaft part (160), and wherein - The insertion shafts (120, 120 ', 120' ') are arranged laterally adjacent to each other at the same distance from the central axis of rotation (105) within the feed drum (110). Device (100) after Claim 1 , characterized in that all three wall sections (142, 143, 143 ') are formed by a one-piece unit which forms a self-contained shaft wall (141). Device (100) according to one of the preceding claims, characterized in that the two flanges (144, 144 ') are joined to form a unit. Device (100) according to one of the preceding claims, characterized in that the extensions of the flanges (144, 144 ') of the first shaft part (140) are arranged outside the cross-sectional area of the second shaft part (150) in order to engage the saw blade of the circular saw ( 130) in the overall cross-sectional area of the second shaft part (150). Device (100) according to one of the preceding claims, characterized in that the third shaft part (160) has a cross section which corresponds essentially to the cross section of the first shaft part (140), a peripheral wall section (162) of the third shaft part (160) an extension of the peripheral wall section (142) of the first shaft part (140) and two adjacent inner wall sections (163, 163 ') of the third shaft part (160) an extension of the two inner wall sections (143, 143') of the first shaft part ( 140) are formed. Device (100) after Claim 5 , characterized in that an alternative opening for ejecting sawn-off logs of the third shaft part (160) is provided in the region of a peripheral wall section (162) which is not formed. Device (100) according to one of the preceding claims, characterized in that the two inner wall sections (163, 163 ') of the third shaft part (160) close to the axis of rotation (105) of the feed drum (110) in the transition region in which they meet border, are also each provided with flanges (164, 164 '), and these flanges (164, 164') each have a web (151) formed as an extension of the flanges (144, 144 ') of the first shaft part (140) relevant flange (144, 144 ') of the first shaft part (140) are connected. Device (100) according to one of the preceding claims, characterized in that the third shaft part (160) is divided into successively arranged shaft parts (170, 180, 190) which are separated from one another by spaces (175, 185), in the area of the third shaft part (160), a plurality of shaft floor panels (210, 220) arranged perpendicular to the central axis of the third shaft part (160), which can be inserted into the spaces (175, 185) and act as alternative shaft floors, are provided in order to predetermined positions of a reversible, Shaft floor (200) to form an alternative shaft floor of a respective insertion shaft (120) in order to saw logs of wood to different lengths. Device (100) according to one of the preceding claims, characterized in that the insertion shafts (120, 120 ', 120'') in the feed drum (110) are oriented such that when the saw blade of the circular saw (130) is arranged in a right half the feed drum (110) when the feed drum (110) rotates counterclockwise releases the exit opening (131) of the third shaft part (160) sawn logs above a conveyor belt (190) arranged below the left half of the feed drum (110). Device (100) according to one of the preceding claims, characterized in that the two wall sections (143, 143 ') of the first shaft part (140) close to the axis of rotation (105) of the feed drum (110) are designed to be bent one or more times by one or more to form more corners (147, 147 ') in a predetermined position. Device (100) according to any one of the preceding claims, characterized in that the peripheral wall section (142) of the first shaft part (140) remote from the axis of rotation (105) of the feed drum (110) is bent one or more times by one or more Form corners (146) in a predetermined position. Device (100) after Claim 11 , characterized in that the one or more corners (146) of the peripheral wall section (142) of the first shaft part (140) are arranged in order to form a counter-pressure surface for the logs to be sawn, which is essentially perpendicular to that caused by the saw blade of the circular saw ( 130) is applied to a piece of wood in the process of sawing. Device (100) according to one of the preceding claims, characterized in that the two inner wall sections (143, 143 ') of the first shaft part (140) in the transition region in which the two flanges (144, 144') are adjacent to one another, are connected to one another via a connecting wall (145). Device (100) according to one of the Claims 4 to 13 , characterized in that the two inner wall sections (163, 163 ') of the third shaft part (160) are connected to one another via a connecting wall (165) in the transition region in which the two flanges (164, 164') are adjacent to one another are.

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