EP1160062A2 - Holding device for a chain saw - Google Patents

Abstract

The holding device for a chainsaw comprises a bearing device (10) for receiving the chainsaw (51), a fixing device (30) for fastening the holding device relative to the wooden element (50) to be sawn, and at least one joint (19, 22, 23) via which the bearing device (10) is movably connected to the fixing device (30). <IMAGE>

Description

The invention relates to a holding device for a chainsaw when sawing of wooden elements, especially wooden beams.

As part of carpentry and certain carpentry work it is often necessary to use wooden elements such as wooden beams or wooden bars cut to size on site at the construction site. This is preferred with the help of a chainsaw, which is an endless loop around a sword Has chain with saw teeth that are from an internal combustion engine or Electric motor is driven. A chainsaw can be proportionate because of it light weight taken to almost any location and can therefore be used very easily and flexibly. The one Saw cut to be made of wood element is usually beforehand with the help of a crack on the wooden element, and it is then free with the the hand-held chainsaw tries to be as exact as possible along the crack to cut. Marking the crack is cumbersome and time-consuming, and the resulting cut is relatively imprecise. Further is disadvantage that the hands-free cutting with the chainsaw with a considerable danger to the executors, especially since ergonomically unfavorable postures must be cut. The above Problems increasingly occur in the manufacture of roof trusses, in which it it is often necessary to saw off wooden beams in such a way that the cut surface is closed two sides of the wood are slanted at the same time. This is for example the case in the intersection of two roof surfaces with hip roofs.

As an alternative to working with a chainsaw, stationary saws can also be used be used. For example, stationary joinery systems with two large circular saw blades adjustable in two levels as well as stationary Circular saws with a saw blade adjustable in one plane and a stop angle known. However, these facilities are relatively expensive and have a large space requirement. However, it is particularly disadvantageous that they are not mobile, so that the wood is transported to the saw in a cumbersome manner must become.

Against this background, it is an object of the present invention, a To provide device with which a simple, fast, safe and enables precise sawing of wooden elements such as wooden beams in particular becomes.

This task is accomplished by a holding device for a chainsaw Claim 1 solved. Advantageous embodiments are in the subclaims specified.

(a) eine Lagereinrichtung zur Aufnahme, das heißt Lagerung und Fixierung, einer Kettensäge;

(b) eine Fixiereinrichtung zur Befestigung der Haltevorrichtung relativ zum zu sägenden Holzelement;

(c) mindestens ein Gelenk, über welches die Lagereinrichtung beweglich mit der Fixiereinrichtung verbunden ist.

The holding device according to the invention for a chainsaw during the sawing of wooden elements, in particular wooden beams, accordingly contains

(a) a storage device for receiving, i.e. storing and fixing, a chainsaw;

(b) a fixing device for fastening the holding device relative to the wooden element to be sawn;

(c) at least one joint via which the bearing device is movably connected to the fixing device.

The holding device makes it possible to make cuts on wooden elements on site with the help of a chainsaw, the execution in quick, is easier, safer and at the same time precise. This will do so achieved that the holding device relative to the via sawing wooden element can be attached or fixed. The Fixing device can basically on any stationary objects be attached. It is preferably on the wooden element to be sawed itself attached, because in this way inevitably any relative movement between the holding device and the wooden element is excluded. This applies itself when the wooden element itself is not fixed. The one on the fuser won fixation of the holding device is transferred to the Storage device and thus on the chainsaw, so that this too relative to Wooden element is supported.

Through that provided between the fixing device and the bearing device The bearing device is still defined in the joint by the joint predetermined limits movable. This agility is required to make the desired cut with the chainsaw. By mechanical It guides the movement of the chainsaw over the joint achieved a clean cut on a predetermined by the joint Web is running. The awkward marking of a crack can can be saved because the desired cut over the degrees of freedom of movement of the joint is specified. Basically comes for the joint any type of joint in question, i.e. translational and / or rotational Joints. Rotary joints are preferred.

A great advantage of the holding device is that the mobility of the Use of the chainsaw is preserved because the holding device is together Use with a chainsaw at any desired location leaves. It is also advantageous that the holding device the risk of an accident reduced, as an uncontrolled swinging out of the chainsaw almost is excluded.

In a preferred development of the invention, this has between the fixing device and bearing device provided at least one joint perpendicular to the level of the chainsaw sword of an inserted chainsaw standing axis of rotation. Furthermore, the joint is preferably 360 ° around this axis of rotation rotatable. Such a rotary movement can then be carried out with the joint run that chainsaw at the level of the chainsaw sword is moved and can therefore make a straight cut.

In one possible embodiment of the fixing device, it has a support device and a jaw, the distance between which is adjustable is. The support device and clamping jaw can be in the form of pliers pinch between them and thus the holding device on this Fix the object. As already mentioned, the fixing device advantageously on the wooden element to be sawn, for example one Wooden beams, fixed.

The clamping jaw is preferably projecting vertically on a connecting rod arranged, the clamping jaw in different positions on the Connecting rod can be set. The connecting rod works a thread with a rotary lever in the manner of a spindle drive together that the connecting rod and thus the attached to it Clamping jaw can be adjusted.

The adjustable clamping jaw preferably engages with a locking pin Connecting rod. The connecting rod has several for this purpose longitudinally spaced engagement holes. Using the locking pin the clamping jaw is initially rough according to the thickness of the wooden element set. Then the rotary lever is turned around the clamping jaw to be clamped to the wooden element using the connecting rod.

The support device can preferably have further stop elements, with which the fixing device on at least one other surface of the wooden element can be created. Through the further attacks the tight fit and the precise alignment of the holding device continue elevated.

In a preferred embodiment of the holding device, the bearing device for the chainsaw over a cross rail in different cross positions connected to the fixing device for the support device. To this The area that can be cut with the chainsaw can be expanded accordingly become.

Between the storage device for the chainsaw and the fixing device can be arranged an articulated arm which connects the two devices and which preferably contains the at least one joint. By the articulated arm can be a working distance between the Fixing device and the storage device ensures and the storage device can be positioned at different points in the room. Through an im Articulated arm contained joint is the arm in different, relative to each other movable segments divided. Basically everyone is a joint Suitable joint types, especially swivel joints that have a rotary motion allow around at least one axis of rotation.

The articulated arm preferably contains two hinge joints in series. On Hinge joint allows only one movement around a structurally predetermined Axis of rotation to. The actuation of a hinge joint therefore allows only one Movement in one degree of freedom, what with the holding device according to the invention has the advantage that in this way a precise management of the Chainsaw is possible. The hinge joints are with their axes of rotation preferably arranged so that the axis of rotation of a hinge joint is perpendicular to the axis of rotation of the other hinge joint. This ensures that with the hinge joints as independent of each other as possible Rotations can be carried out and the largest possible area of space is covered.

Furthermore, it is preferred if the at least one joint, which the fixing device connects to the storage device, has a locking device, with which the mobility of the joint is quickly and easily canceled can be. By loosening the locking device, the bearing device with the chainsaw located in it according to the one to be executed Cut are aligned, when reaching the desired Alignment the present joint position can be fixed. Farther can the chain saw in a certain position by the locking device be stored in a fixed position when it is not in operation.

The storage device for receiving the chainsaw preferably has a holding plate and at least one support element projecting therefrom, the motor housing of a chainsaw are placed on these elements can. Furthermore, preferably adjustable on the support elements Clamping elements are provided through which the motor housing of the chainsaw can also be clamped and thus fixed.

According to another embodiment, the bearing device preferably has two adjustable clamping elements, between which the sword the chainsaw can be caught. Such a fixation of the chainsaw sword, which preferably takes place as close as possible to the motor housing, guarantees safe and immovable storage of the chainsaw and thereby ensures a clean cut.

Fig. 1:

eine erste Ausführungsform der erfindungsgemäßen Haltevorrichtung, wobei die Anbringung an einem Holzbalken und eine eingesetzte Kettensäge angedeutet sind;

Fig. 2 :

eine zweite Ausführungsform der erfindungsgemäßen Haltevorrichtung, und

Fig. 3 :

die Haltevorrichtung nach Figur 2 aus einer anderen Perspektive.

In the following the invention is explained by way of example with the aid of the figures. Show it:

Fig. 1:

a first embodiment of the holding device according to the invention, wherein the attachment to a wooden beam and an inserted chainsaw are indicated;

Fig. 2:

a second embodiment of the holding device according to the invention, and

Fig. 3:

the holding device according to Figure 2 from a different perspective.

In Figure 1 is a first embodiment of the holding device according to the invention shown in perspective for a chainsaw, whereby for better Recognizability of the function of a wooden beam 50 to be sawn and a motor chain saw 51 are indicated schematically. The holding device consists in essentially of three assemblies, namely firstly the fixing device 30, with which it is clamped in particular on the wooden beam 50 to be sawn second, the bearing device 10 into which the chain saw 51 can be used, and third, an articulated arm 20, which the Fixing device 30 articulates with the bearing device 10.

Structure and function of the holding device according to the invention are first based on the second embodiment shown in Figures 2 and 3 explained in detail. The holding device can with the fixing device 30 are attached to a suitable object. Preferably - but not necessarily - it is the one to be sawn Wooden beams (see number 50 in Figure 1). For attachment to such a wooden beam 50, the fixing device 30 has an upper support device 32 and a lower jaw 33, which by means of a connecting rod 34 are interconnected.

The support device 32 consists of an arrangement along the wooden beam 50 Square tube 35, with three transversely directed, projecting downwards Support elements 36 is firmly connected, which on the surface of the wooden beam 50. At one end of the outer support elements 36 protruding downward stop elements 37 are provided, which on a second surface of the wooden beam 50 can be created and for one further stabilization and alignment of the holding device on the wooden beam 50 to care.

The middle support element also serves as storage for a rotating device 38. The rotating device 38 consists essentially of a sleeve-shaped Rotating element 39, which has a central, not shown internal thread and by means of a rotary lever 40 around a connecting rod 34 aligned axis can be rotated. The top end of the connecting rod 34 has a corresponding external thread, that with the internal thread of the rotating element 38 cooperates. By turning the rotating element 38 by means of the rotary lever 40 thus the connecting rod 34 Moved axially upwards or downwards in the manner of a spindle, a guide pin 41 the connecting rod 34 into a longitudinal groove 42 of a stabilizing sleeve 43 engages, which extends from the middle support element 36 downwards.

The lower jaw 33 is longitudinally displaceable by means of a sleeve ring 44 mounted on the connecting rod 34. One held on the sleeve ring 44 Locking pin 45 penetrates the sleeve ring 44 and can be in locking holes 46 are inserted, which are provided in the connecting rod 34. The Locking holes 46 are preferably in a row along the connecting rod 34 arranged at regular intervals. By moving the lower jaw 33 on the connecting rod 34 and snapping the Locking pin 45 in the corresponding locking hole 46 can thus be a achieve rapid coarse adjustment of the lower jaw 33 when the Holding device to be attached to the wooden beam 50. By subsequent Turning the rotary lever 40 can then on the holding device between the support device 32 and lower jaws 33 Wooden beams 50 are clamped with high force. Clamping the holding device on the wooden beam 50 is in principle similar to that Put on a screw clamp and can therefore be easily and accordingly perform quickly.

An articulated arm 20 is attached to the fixing device 30 by means of a cross rail 31 attached. As can be seen from FIGS. 2 and 3, the cross rail 31 is open the top of the square tube 34 attached transversely to this and is also from a sturdy square tube. The first segment 26 of the articulated arm 20 has a flange at the lower end for fastening the articulated arm 20 on the cross rail 31. This is done by means of screws 47, which in different transverse positions of the first segment 26 relative to the transverse rail 31 are screwed into the screw holes 48 provided there can. Due to the possibility of different positioning in The articulated arm 20 and thus the possible swivel range can be transverse the chainsaw can be optimally adapted to the requirements.

The articulated arm 20 consists of four individual segments, i.e. Moreover already mentioned lowest segment 26 from three further segments 27, 28, 29, which are articulated to one another via two hinge joints 22, 23 are. The axis of rotation of the hinge joint 22 runs essentially perpendicular, while the axis of rotation of the hinge joint 23 at least in runs essentially horizontally. The two axes of rotation are thus perpendicular one another and allow any spatial orientation of the Bearing device 10. Each hinge joint 22, 23 carries a degree of freedom to mobility, which is independent of the other degree of freedom can be moved.

Furthermore, there are quick-locking devices on each hinge joint 22, 23 provided so that e.g. by rotating a corresponding one Locking lever 24, 25 the respective hinge joint 22, 23 in the set Position can be set.

For checking and easier reproducibility of the set joint position appropriate scales can be provided in the joint areas his.

The connection of the articulated arm 20 to the bearing device 10 takes place via a Another hinge 19 that is in the chain behind the second hinge 23 is arranged directly on the holding plate 15. The swivel joint 19 allows the holding plate 15 to be rotated through 360 ° about an axis perpendicular to the Retaining plate. The execution of such a rotary movement allows the Chainsaw to move in the plane of the chainsaw sword and thus make a straight cut.

The second segment 27 of the articulated arm 20 is at the lowest segment 26 in different height positions can be screwed tight with screws 21. For this the bottom segment 26 has a plurality of in the longitudinal direction of the bottom Segment 26 spaced screw holes. This can result in simple way the distance of the storage device 10 to the wooden element to be sawn can be set.

The storage device 10 is used for receiving, holding and fixing a Chainsaw 51 (see Figure 1). The central element of the storage device 10 is the already mentioned holding plate 15, which as a one-sided system for the housing a chainsaw 51 and serves as a mounting base for other elements.

A rod-shaped support element 16 extends perpendicularly from the holding plate path. The support element 16 is fastened in an elongated hole 18 in the holding plate 15 so that the exact position can be adjusted if necessary can be. There are two clamping elements 17 on the support element 16 arranged which moves along the axis of the support member 16 and in a set axial position can be locked using clamping screws can. With the clamping elements 17, it is in particular possible to grasp the handle a chain saw inserted into the bearing device 10.

Furthermore, there is a clamping device for the sword 52 on the holding plate 15 (Figure 1) arranged the chainsaw. This clamping device consists of two parallel terminal strips 12 and 14, one between them Create a gap for the chain saw to pass through. On their the sides facing the sword have the terminal strips 12 and 14 in middle area clamping projections 13. These kick with the sword of the Chainsaw in contact and clamp it firmly between yourself when the movable terminal block 12 by tightening screw connections two levers 11 is pulled against the second terminal block 14. It is ensured that between the two terminal blocks 12 and 14 in those Areas remain a sufficiently large distance in which the saw chain runs, so that even when the chainsaw sword is clamped the saw chain can move freely.

A chainsaw can thus in the storage device 10 on simple and can be clamped quickly in order to then be sawn over the Wooden beams fixed holding device a clean, safe and quick To enable cut. It is also conceivable that the bearing device 10 or parts of it remain attached to the chainsaw and after execution a cut the separation of the chainsaw from the holding device another location, such as on one of the joints 22 or 23 or on the Cross rail 31 takes place.

The holding device thus has an articulated arm 20 which is articulated several interconnected segments 26, 27, 28, 29 comprises and over the Fixing device 30, which is attached to the wooden element 50 to be sawn, in the Protrudes like a cantilever. The articulated arm 20 expediently stands in this way via the fixing device 30, in particular in its longitudinal direction, that problem-free all-round cutting with the chainsaw, i.e. a 360 ° all-round cut is possible. Because the articulated arm 20 are fastened transversely to the fixing device 30 in different positions can, what by a transverse adjustment of the lowest segment 26 on the Cross rail 31 takes place, the chainsaw can always be in such a position brought that when cutting through the wooden element to be sawn 50 the wood fibers from the chain of the chainsaw, at least over the largest Part of the circumference of the wooden element 50 is always pulled inwards. This results in a clean cut without the edges of the wooden element 50 fray. The spacious height and cross adjustment option of the articulated arm 20 is particularly important in large inclined positions, where the sword is often no longer in one go through the whole Wood element 50 would go through. Even large bars are therefore no problem Can be cut in any inclined position.

The bottom segment 26 does not have to be fixed on the transverse rail 31 via a screw connection, but can also be done in other ways. For example, it is possible to use a sliding guide with a quick-release fastener to provide. It is useful, but not mandatory, that the Cross rail 31 is arranged in an end region of the fixing device 30.

The embodiment of the holding device of Figure 1 differs from that of Figures 2 and 3 essentially in that the on the Wooden beam 50 resting support device 32 as a flat support bar 35 ' is formed, which rests on the entire surface of the wooden beam 50. The stop elements 37 are in the embodiment of Figure 1 as L-shaped elbows projecting downward over the support bar 35 ' formed, which are attached directly to the support bar 35 '.

Furthermore, in the embodiment of FIG. 1, the lowest segment 26 cannot be fastened to the cross rail 31 in different transverse positions, but in a certain position on the support bar 35 'screwed.

Claims (13)

Holding device for a chainsaw when sawing wooden elements, in particular wooden beams (a) a bearing device (10) for receiving a chainsaw (51); (b) a fixing device (30) for fastening the holding device relative to the wooden element (50) to be sawn; (c) at least one joint (19, 22, 23) via which the bearing device is movably connected to the fixing device. Holding device according to claim 1, characterized in that the at least one joint (19) has an axis of rotation perpendicular to the plane of the chainsaw sword (52) of an inserted chainsaw (51) and is preferably rotatable by 360 ° about this axis. Holding device according to claim 1 or 2, characterized in that the fixing device (30) consists of a support device (32) which can be placed on the wooden element to be sawed and a clamping jaw (33) whose distance from the support device can be changed. Holding device according to claim 3, characterized in that the support device (32) and the clamping jaws (33) are operatively connected by means of a connecting rod (34), the clamping jaw (33) being fixable on the connecting rod (34) in different axial positions. Holding device according to Claim 4, characterized in that the clamping jaw (33) can be fixed on the connecting rod (34) via a locking pin (45). Holding device according to claim 4 or 5, characterized in that the position of the connecting rod (34) relative to the support device (32) can be changed by means of a rotating device (38) with a spindle drive. Holding device according to one of claims 3 to 6, characterized in that the support device (32) has at least two spaced-apart support elements (36) for bearing against a surface of the wooden element (50) to be sawn, and that stop elements (36) on the support elements (36) 37) are provided for contact with at least one further surface of the wooden element. Holding device according to one of claims 1 to 7, characterized in that an articulated arm (20) can be fixed on the fixing device (30) via a cross rail (31) in different transverse positions relative to the wooden element to be sawn. Holding device according to one of claims 1 to 8, characterized in that the bearing device (10) is connected to the fixing device (30) via an articulated arm (20) which contains at least one articulation (19, 22, 23). Holding device according to claim 9, characterized in that the articulated arm (20) contains two hinge joints (22, 23) in series, the axis of rotation of one hinge joint (22) preferably being perpendicular to the axis of rotation of the other hinge joint (23). Holding device according to one of claims 1 to 10, characterized in that the at least one joint (22, 23) has a locking device (24, 25) for quick fixing of the joint. Holding device according to one of claims 1 to 11, characterized in that the bearing device (10) has a holding plate (15) and at least one supporting element (16) projecting therefrom for the abutment of a chainsaw (51), preferably adjustable clamping elements (17 ) are provided for attaching the chainsaw. Holding device according to one of claims 1 to 12, characterized in that the bearing device (10) has two distance-adjustable clamping elements (12, 14) between which the chainsaw sword (52) can be clamped.

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