DE102021108373B4 - Double saw for sawing elongated material - Google Patents

Abstract

Double saw for sawing elongated material to be sawn (2), with two saws (4.1, 4.2) arranged parallel to a sawing direction, which extend through a sawing surface (5) at positions of interfaces, characterized in that the saws (4.1, 4.2) in two parallel axes are positioned offset from one another on the sawing surface (5) and the material to be sawn (2) is placed on the sawing surface (5) against the saws in a chamber (7) which is guided in the sawing direction and held together from above and is slotted vertically at the interfaces (4.1, 4.2) is guided and the chamber (7) can be moved back and forth on the sawing surface (5) and the sawing surface (5) has a lower ejection opening (10).

Description

The invention relates to a double saw for sawing elongated material to be sawn, with two saws arranged parallel transversely to a sawing direction and extending through a sawing surface.

Various variants of multiple saws are known in the prior art. In the patent specification DE 10 2004 049 699 B4 a device for sawing elongated material to be sawn is described, in which the material to be sawn is guided to three parallel circular saw blades via a conveyor device acting from below on a flat saw table. To prevent the saw pieces from jamming between the saw blades, they must be tilted.

The same is in the patent application DE 12 25 840 A a shortening saw is described, in which the raw wood is guided to several parallel circular saw blades on a flat saw table via a conveyor device acting from below. A first front saw blade is provided that divides the raw wood symmetrically. In order to avoid jamming of the saw pieces between the following saw blades, auxiliary elements are provided which move the saw pieces apart.

In the patent application EP 0 956 932 A2 A separating arrangement for dividing elongated workpieces is described, in which the workpieces are guided against several saw blades via a conveyor belt with V-shaped receptacles placed on it.

In the patent application DE 10 2005 000 821 A1 A device and a method for sawing wood are described, in which the wood is filled into receiving compartments arranged in a star shape around a central shaft and is then guided against a band saw device, through which two cuts are made. More than two cuts are not planned.

Further multiple saws are available DE 20 2012 008 130 U1 , the AT 190 265 B , the AT 251 268 B , the US 2002/0062881 A1 and the US 1,021,813 A known.

The invention is based on the object of creating a simple double saw through which the material to be sawn can be sawn into several pieces and in which jamming or tilting of the pieces in the double saw is avoided.

This task is solved by the features of claim 1. Embodiments of the invention are described in the subclaims.

The double saw for sawing elongated material to be sawn is equipped with two saws arranged parallel to a sawing direction and extending through a sawing surface at interface positions. The double saw is characterized in that a first saw is positioned in front of the other saw offset on the sawing surface in two parallel axes and the material to be sawn is stored in a chamber that is guided in the sawing direction, open at the bottom and held together from above and which is slotted at the interfaces the saw surface is guided against the saws and the chamber can be moved back and forth on the saw surface, and the saw surface has a lower ejection opening.

• Scheitholz von 33 cm Länge:
  • Das Meterholz wird zunächst von oben oder von der linken Seite in die Kammer gelegt und rechtsbündig bis zum Anschlag geschoben. Nun wird das Meterholz durch Vorwärtsbewegen der Kammer gegen die beiden Sägen in drei gleich lange Stücke geteilt und diese fallen am Ende der Sägefläche nach unten durch die offene Kammer in den Auffangbehälter.
• Scheitholz von 25 cm Länge:
  • Das Meterholz wird zunächst von oben oder von der linken Seite in die Kammer gelegt und rechtsbündig bis zum Anschlag geschoben. Nun wird das Meterholz durch Vorwärtsbewegen der Kammer zunächst nur gegen die erste Säge geführt und nicht weitergeschoben. Dabei werden 25 cm lange Stücke abgesägt. Dann wird die Kammer wieder zurück in die Ausgangsstellung gezogen. Bei diesem Vorgang fallen die an der rechten Seite abgesägten 25 cm-Stücke nach unten durch die Auswurföffnung und rutschen auf der schrägen Rutsche weiter in den Auffangbehälter.

This double saw is particularly suitable for processing meter-long logs into firewood. With appropriate saw spacing, 25 cm or 33 cm pieces can be sawn. Logs with lengths of 33 cm and 25 cm are produced in different ways, with the saws protruding through corresponding slots in the sawing surface:

• Logs 33 cm long:
  • The meter wood is first placed into the chamber from above or from the left side and pushed flush to the right until it stops. Now the meter of wood is divided into three pieces of equal length by moving the chamber forward against the two saws and these fall down through the open chamber into the collecting container at the end of the sawing surface.
• Logs 25 cm long:
  • The meter wood is first placed into the chamber from above or from the left side and pushed flush to the right until it stops. Now, by moving the chamber forward, the meter of wood is initially only guided against the first saw and is not pushed further. This involves sawing off 25 cm long pieces. The chamber is then pulled back into the starting position. During this process, the 25 cm pieces sawn off on the right side fall down through the ejection opening and slide further into the collecting container on the inclined chute.

Only after the chamber has been completely retracted to the initial situation will the upper opening of the chamber be accessible again. The remaining 75 cm long pieces are then pushed to the right as far as they will go. These pieces are made by repeatedly moving the chamber forward against the first and second saws pushed. Using the two saws, the remaining 75 cm long section is sawn into three equal parts and then falls down into the collecting container at the end of the sawing surface.

In this way, the material to be sawn can be sawn into several pieces. The distance between the saws and the lateral boundary of the chamber and their distance from one another determine the length of the saw pieces.

The offset arrangement of the two saws prevents jamming when sawing and tilting of the sawn parts of the material to be sawn. In particular, the cutting (“cutting”) of irregularly grown, non-flat wood, e.g. B. pre-split firewood.

The sawing surface is advantageously designed to be straight so that the chamber can be guided linearly on the sawing surface.

A curved sawing surface is also possible, on which the chamber is guided roundly.

The chamber is preferably open on its upper side so that it can be filled with sawn material from the outside. The chamber is so large that several pieces of wood can be stored parallel to each other as sawn material in the chamber. This allows you to cut a large number of pieces of wood at the same time.

The saws are preferably designed as circular saws which are mounted under the saw surface and whose saw blades extend through the saw surface. However, chainsaws that reach through the saw surface with their blade are also possible.

The saw blades on circular saws or the saw blades on chainsaws extend so far into the chambers that the material to be sawn is cut when the chambers move forward. The chambers are slotted at the interfaces. This does not affect the upper cohesion of the chambers.

The double saw has a stand on which the saws are permanently mounted and powered. The stand also holds the saw surface. The chamber is attached to the saw surface with a guide that allows forward and backward movement.

The saws of the double saw can also each be mounted on their own stand. This means you can easily change the length of the saw pieces. Both stands then hold the sawing surface together, in which corresponding slots are made at the intended interfaces.

To protect users, a full-length cover is installed over the saws. It must be prevented that a user can get their hands on the saws.

The chamber is advantageously moved over the sawing surface using a cable pull on the guides. A handwheel is provided with which the cable pull is pulled. The chamber can be moved forwards and backwards over the sawing surface. A translation can also be provided on the handwheel, which makes moving the chamber easier for the user.

• 1 eine Schrägansicht der Doppelsäge ohne eingebaute Sägen;
• 2 eine Seitenansicht der Doppelsäge;
• 3 eine Draufsicht auf die Doppelsäge mit ungesägtem Sägegut;
• 4 eine Draufsicht auf die Doppelsäge mit einmal geschnittenem Sägegut;
• 5 eine Draufsicht auf die Doppelsäge mit einmal geschnittenen Sägestücken;
• 6 eine Draufsicht auf die Doppelsäge mit für einen zweiten Sägevorgang verschobenem Sägegut;
• 7 eine Draufsicht auf die Doppelsäge mit zweimal geschnittenen Sägestücken;
• 8 eine Draufsicht auf die Doppelsäge mit fertig geschnittenen Sägestücken.

The invention is explained below by way of example with reference to the illustrations. Show schematically:

• 1 an oblique view of the double saw without saws installed;
• 2 a side view of the double saw;
• 3 a top view of the double saw with unsawed material;
• 4 a top view of the double saw with the material to be cut once;
• 5 a top view of the double saw with saw pieces cut once;
• 6 a top view of the double saw with the material to be sawn shifted for a second sawing process;
• 7 a top view of the double saw with saw pieces cut twice;
• 8th a top view of the double saw with finished saw pieces.

In 1 an oblique view of the double saw 1 is shown on its machine stand 12 without built-in saws. The slots 6.1 and 6.2 are incorporated into the sawing surface 5 for a first sawing width, approximately 25 cm. Next to it are the slots 9.1 and 9.2 for a second saw width, about 33 cm.

On the side of the saw surface 5, the guides 8 for the chamber, not shown, are attached, which can thus be guided over all saw slots. There is a filling opening 16 on the side through which the chamber can also be loaded.

The ejection hole 10 is positioned in front of the slot 6.1, through which sawn parts can fall onto the chute 15 and then get into the container 13. The discharge is located above the container 13 edge 14, over which the sawn parts fall, which were pushed further over the slots 6.2 and 9.2.

The 2 shows a side view of the double saw 1, which is set up on a machine stand 12. It has a sawing surface 5 with a chamber 7 that is movable in the guides 8 and into which the material to be sawn 2 is filled. The chamber 7 is moved via the cable 18, which is pulled with a handwheel 19. A translation can also be provided on the handwheel 19.

The two saws 4.1 and 4.2 protrude through the saw surface 5 and are covered with the cover 17, which is intended to protect against injuries.

At the lower end of the sawing surface 5 is the ejection opening 10, shown here in dashed lines, through which the sawn parts 3 slide over the chute into the container 13. Sawn pieces 3 also fall into the container 13 via the discharge edge 14.

In the 3 until 8th the double saw 1 is shown in a top view with different positions of its chamber 7. The chamber 7 moves back and forth on the sawing surface 5, pulled on the cable 18 with the handwheel 19 and guided on the guides 8. The material to be sawn 2 is loaded into the chamber 7. The saws 4.1 and 4.2, driven by the drives 11.1 and 11.2, protrude from the saw surface 5 through the slots 6.1 and 6.2.

The distance A between the two saws 4.1 and 4.2 and to the side end of the chamber 7 determine the length of the sawn parts. There are two further slots 9.1 and 9.2 in which the saws 4.1 and 4.2 can be positioned. Then the sawn pieces 3 have the length B.

The ejection hole 10 is located at the lower end of the sawing surface 10 and is so wide that the parts sawn by the first saw 4.1 can fall through there.

At the upper end of the sawing surface 5 there is the discharge edge 14, over which the sawn parts are ejected when the chamber 7 is moved over them.

According to 3 The chamber 7 with the sawn material 2 is located at the lower end of the sawing surface 5. The sawn material 2 is now pressed against (see arrow) the first saw 4.1 with the help of the chamber 7. According to 4 Parts 3 are sawn off from the material to be sawn 2 as the chamber 7 moves forward with the first saw 4.1.

When moving backwards, continue in the direction of the ejection hole 10 5 and 6 These parts 3 then fall down from the sawing surface through the ejection hole 10.

Now chamber 7 is according to 7 moved further forward and further parts 3 are sawn off from the material to be sawn 2 by the second saw 4.2. If the chamber 7 is now moved further forward, the sawn-off parts 3 fall accordingly 8th out of the chamber 7 via the discharge edge 14. The chamber 7 is then moved back and the sawing process can begin with new material 2 to be sawn.

Reference symbol list

1

Double saw

2

sawing material

3

sawn parts

4.1

first saw, first saw blade

4.2

second saw, second saw blade

5

sawing surface

6.1

first slot

6.2

second slot

7

chamber

8th

guide

9.1

first parallel slot

9.2

second parallel slot

10

ejection hole

11.1

first saw drive

11.2

second saw drive

12

Machine stand

13

container

14

discharge edge

15

slide

16

side opening

17

cover

18

pulley

19

Handwheel

A

small distance between the saws

b

greater integrity of the saws

Claims (14)

Double saw for sawing elongated material to be sawn (2), with two saws (4.1, 4.2) arranged parallel to a sawing direction Positions of interfaces extend through a sawing surface (5), characterized in that the saws (4.1, 4.2) are positioned offset from one another in two parallel axes on the sawing surface (5) and the material to be sawn (2) is guided in the sawing direction and from above held together chamber (7), which is slotted vertically at the interfaces, is guided on the sawing surface (5) against the saws (4.1, 4.2) and the chamber (7) can be moved back and forth on the sawing surface (5) and the sawing surface (5) has a lower ejection opening (10). double saw Claim 1 , characterized in that the distance (A, B) of the saws is 25 cm or 33 cm. double saw Claim 1 characterized in that the sawing surface (5) is straight. double saw Claim 1 , characterized in that the saw surface (5) is curved. double saw Claim 1 , characterized in that the sawing surface (5) has a discharge edge (14) at the end opposite the ejection opening (10). double saw Claim 1 , characterized in that the chamber (7) is open on its upper side (8) so that it can be filled with sawn material (2) from the outside. double saw Claim 6 , characterized in that several pieces of wood can be received as sawn material (2) lying parallel in the chamber (7). double saw Claim 1 , characterized in that the saws (4.1, 4.2) are circular saws. double saw Claim 1 , characterized in that the saws (4.1, 4.2) are chainsaws. double saw Claim 1 , characterized in that the saws (4.1, 4.2) are mounted on a stand (12) which also holds the sawing surface (5). double saw Claim 10 , characterized in that the saws (4.1, 4.2) are mounted on two stands (12), which also hold the sawing surface (5). double saw Claim 1 , characterized in that there is a cover (17) above the saws (4.1, 4.2). double saw Claim 1 , characterized in that the chamber (7) is moved over the sawing surface (5) by means of a cable pull (18). double saw Claim 13 , characterized in that the cable pull (18) is pulled by means of a handwheel (19).

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