WO2002070219A1

WO2002070219A1 - Chain saw for sawing masonry

Info

Publication number: WO2002070219A1
Application number: PCT/CH2002/000123
Authority: WO
Inventors: Hans Bieri
Original assignee: Tyrolit Hydrostress Ag
Priority date: 2001-03-01
Filing date: 2002-02-28
Publication date: 2002-09-12

Abstract

The invention relates to a chain saw device (1) and to a method for the use thereof. The chain saw device (1) is used to make cuts in masonry (15, 31), especially masonry from stone or concrete. The chain saw device (1) comprises a chain saw (2) and a holding device (3) for holding and moving the chain saw (2). The holding device (3) has first guide means (10, 12), second guide means (11, 13), and a base (13) for mounting the chain saw (2). The first guide means (10, 12) guide the second guide means (11, 13) in a first direction (y). The second guide means (11, 13) guide the base (13) together with the chain saw in a second direction (x) in such a manner that cuts of a defined length (K) can be made in the masonry (15, 31).

Description

CHAIN SAGE FOR SAYING MASONRY

The invention is in the field of chainsaws and relates to a device and a method for sawing masonry, in particular masonry made of stone and concrete.

Chainsaws for sawing concrete and stone are known from the prior art. US-5,078,119 (US ^* 119), respectively. DE 39 14 679 shows a device which can be used together with a circular saw which can be displaced along a guide rail and which is used to create cutouts and openings in masonry. The chainsaw has a saw blade mounted on one side, which allows flush cutting along a wall and is only used together with the circular saw. It is used to rework areas (corners) that cannot be reached with a circular saw. The chainsaw is designed so that it is also attached to the guide rail of the circular saw, respectively. can be moved along this driven by a motor. The chain saw known from US 119 has the disadvantage that the wear and the mechanical load on the device are relatively high. The chainsaw is not suitable for making longer cuts. Due to the way the cut is made, a precise cut over long distances is not possible. It is an object of the invention disclosed here to show a device and a method which are used to create cutouts and openings in masonry by sawing. In addition to high cutting performance and high precision, the invention is intended to guarantee. By means of the invention, it should also be possible to make precise cuts over larger distances, which extend to corner areas, flush with a wall.

The invention relates to a chain saw device for sawing masonry from stone and concrete. The device includes a chainsaw and a holding device for holding and moving the chainsaw spatially. The holding device has a first guide means and a second guide means and a base for receiving the chainsaw. The first guide means serves to guide the second guide means in a first direction. The second guide means is used to guide the base with the chainsaw in a second direction. The chainsaw has a saw blade. The saw blade is used to guide and deflect the saw chain using deflection rollers.

A fundamental finding on which the invention disclosed here is based is that a precise cut over a large distance cannot be made with a chain saw by moving it only perpendicular to a side edge of its saw bar. If a chainsaw is moved over a larger distance, essentially only perpendicular to the cutting edge of its saw blade, there are various disadvantages. On the one hand the cutting forces (cutting forces) are comparatively low and on the other hand the saw tends to run out of the cutting direction. Comparatively much better results are achieved if the saw blade is not moved perpendicular to the cutting edge, but essentially in the direction of its tip (longitudinal direction), such that primarily the or only the chain part that surrounds a deflection roller located at the tip of the saw blade is sawn. Since a chain guided on a deflection pulley, for example, with ball or roller bearings, likewise experiences significantly less friction than a saw chain that grinds along a side edge of a saw bar, the chain part located on the deflecting roller can be used with correspondingly higher cutting forces without excessive material loading taking place.

A cut is advantageously not made in one piece, e.g. by moving the saw blade from the starting point to the end point, since the precision and the stability of the device suffer significantly. Depending on the application, the precision of the cut is significantly better if the cut is made in sections. This can e.g. can be achieved by repeatedly inserting the saw blade into the wall, essentially perpendicular to it. This procedure guarantees that the cut follows the specified direction. A so-called "running out of the cutting direction" of the saw blade, as is inherent in the prior art, is avoided. The spatial guidance of the saw blade during the creation of a cut is adapted to the above findings.

The device used to guide the saw blade is designed in such a way that there is a correspondingly suitable number of spatial degrees of freedom. In addition to a movement in the direction of the specified cutting course, at least one further movement is e.g. possible perpendicular to a wall. If necessary, the device can be designed in such a way that pivoting movements about certain spatial axes parallel and perpendicular to the cutting direction are also possible.

The device preferably has drive means for two spatial degrees of freedom, which enable the saw blade to be moved in a controlled manner, for example parallel to the cutting direction and perpendicular to the wall to be machined. The drive means are, for example, electric or hydraulic drives. Alternatively or in addition manual drive means can also be used. The drive means can have toothed or threaded rods which are suitable for generating a directional movement. In addition to the drive means, locking means, such as bolts and locking screws, are also available if required, which allow locking of certain degrees of freedom.

A preferred embodiment of a device with two spatial degrees of freedom for the controlled movement of the saw blade for working a masonry is described below schematically and in a highly simplified manner. The device for controlled movement of the saw blade has a first guide rail which is designed in such a way that it can be temporarily fixed to a wall (masonry) and essentially parallel to its surface. A first slide is arranged along this first guide rail, which is, for example, a profile tube, in such a way that it can be displaced longitudinally. Suitable first drive means are available which allow the first carriage to move in a controlled manner relative to the first guide rail. A further second guide rail, for example essentially arranged perpendicular to the first guide rail, is attached to the first carriage. A second slide is slidably arranged along the second guide rail. A chain saw with a saw blade is attached to this second carriage. If necessary, the saw blade can be moved by further degrees of freedom. can be locked in certain positions. With this device it is possible to create a cut in a brickwork in the manner described above. The saw blade is moved along the second guide rail with the saw chain running, in such a way that it penetrates essentially vertically into a wall to be machined. Once a defined penetration depth has been reached, the saw blade is moved in the opposite direction along the second guide rail and pulled out of the resulting cut. The saw bar is then shifted laterally by a certain distance along the first guide rail and then again into the wall along the second guide rail stab. The saw blade is preferably designed such that a cut that is flush with a wall can be made.

The saw blade of the chainsaw device is usually detachably connected to a chassis of the chainsaw. The saw blade usually has at least one deflection roller with ball or roller bearings for a saw chain at its tip. At least one of the deflection rollers is driven. Depending on the area of application, the shape of the saw blade can be selected accordingly. In addition to bar-shaped configurations of different lengths with two parallel sides, e.g. V-shaped configurations also make sense. Other shapes with straight or curved sides and correspondingly more deflection rollers are possible.

The chain saw device according to the invention can, if required, be equipped with a controller with a microprocessor which controls the sawing process. The control enables cuts to be made largely automatically and under optimal conditions. Measurements from sensors can be fed into the control, which provide information about the current operating conditions and parameters (eg cutting forces, cutting speed, distance, temperature, abrasion, wear of relevant parts).

The invention is explained in more detail with reference to the following figures. Show it:

FIG. 1 shows a chain saw device in a perspective view,

FIG. 2 shows a chain saw device in two positions,

FIG. 3 shows a chain saw device in a top view,

FIG. 4 shows a cut according to the method,

Figure 5 shows an application of a chain saw device.

Figure 1 shows schematically and greatly simplified a chain saw device 1 in a perspective view. The chain saw device 1 has a chain saw 2 which is fastened to a holding device 3. The holding device 3 includes a first and a second guide rail 10, 11 and a first and a second slide 12, 13. The first guide rail 10 is designed such that it is temporarily on a first wall 15 (masonry) and essentially parallel to its surface can be attached. To fasten the first guide rail, this has angled spacing means 14, which can be screwed onto the first wall 15, for example by means of dowels (not shown in more detail). The first slide 12 is slidably mounted on the first guide rail 10. In order to move the first carriage 12 along the first guide rail 10, a first drive means 16 is provided. The drive means is, for example, an electric or a hydraulic motor which, for example, uses a toothed or threaded rod (not shown in more detail) to move the first carriage relative to the first guide. move rail 10. Manual drives, for example with hand cranks, are also conceivable depending on the area of application. On the first carriage 12, the second guide rail 11, here essentially perpendicular to the wall 15, respectively. to the first guide rail 10. The second carriage 13 is arranged to be displaceable along the second guide rail 11 via a second drive means 17. The chainsaw 2 is attached to the second carriage 13 (base). The holding device 3 is used for the controlled movement of the chain saw 2. As can be seen, the saw blade 20 of the chain saw 2 is in a cut 21. The saw blade 20 is supported on one side. This makes it possible for the cut 21 to be made flush with a second wall 22. The chainsaw 2 and the device 3 and their components can be dismantled for transport. Instead of the straight guide rails 10, 11 shown here, curved guide rails (not shown in more detail) can also be used.

The length of the first and second guide rails 10, 11 is chosen according to the length of the cut to be made. If necessary, the guide rails 10, 11 can also be composed of a plurality of segments which can be connected via suitable connecting means.

Figure 2 shows the chain saw device 1 according to Figure 1 in a perspective view. The second carriage 13, the second guide rail 11 and the chain saw 2 are shown here in a lower and an upper position along the first guide rail 10. The saw blade 20 of the chainsaw 2 is arranged parallel to the second guide rail 11 here. The saw blade 20 has a saw beam 40 with a front and a rear deflection roller 41, 42. A saw chain 43 runs over the deflection rollers 41, 42. In this arrangement of the saw blade 20, primarily the part of the saw chain 42 that is located on the front deflection roller 41. By tilting the saw blade 20, the side edge in the sawing process. The saw blade 20 is fastened on one side so that a cut that is flush with a wall can be made.

In the embodiment shown here, the first filling means 10, 12 consists of a guide rail 10, which is arranged in an x-direction, and a first slide 12. The first slide 12 is translationally displaceable along the first guide rail 10. The second guide means 11, 13 consists of a second guide rail 11 fastened to the first slide 12, which is arranged here at right angles to the first guide rail 10 parallel to a y-direction, and a second slide 13. The second slide 13 is opposite the second guide rail 11 is arranged to be translationally displaceable and serves as a base 13 for receiving the chainsaw 2.

FIG. 3 shows a top view of a chain saw device 1 schematically and in a highly simplified manner. A first guide rail 10 is fastened to a wall 15 via spacer means 14. The spacing means 14 are designed in such a way that the guide rail 10 can be pivoted about an axis B, which is perpendicular to the plane of the drawing, after releasing a locking device (not shown in more detail). The guide rail 10 has, on two opposite sides, longitudinal guide means 23 in the form of grooves, in which correspondingly shaped counter means 24 of the first slide 12 engage. The guide and the counter means 23, 24 are designed such that they form a linear guide, such that the first carriage 12 has only one degree of freedom, namely displacement in the longitudinal direction of the guide rail, in operation compared to the first guide rail 10. The first carriage 12 can be displaced in a controlled manner along the guide rail 10 via drive means (not shown in more detail). A second guide rail 11 is attached to the first carriage 12 and is arranged here essentially perpendicular to the wall 15. The alignment and arrangement of the second guide rail 11 with respect to the first slide 12 can be adjusted if necessary by appropriate adjusting means 25, for example adjusting screws, etc.

A second slide 13 can be seen on the second guide rail 11, which can be displaced along the second guide rail 11 via a linear guide (not shown in more detail). The second carriage 13 is moved along the second guide rail 11 via drive means (not shown in more detail). The chain saw device 1 is constructed in such a way that it can be disassembled by loosening fasteners. The second carriage 13 serves as the base for attaching a chainsaw 2. This is designed here such that it allows a cut to be made flush with a second wall 22. A saw blade 20 of the chainsaw 2 is held on one side for this purpose. As can be seen, the saw blade 20 of the chainsaw 2 is in a cut 21 in a masonry 26. The saw blade 20 is connected to a chassis 28 of the chainsaw 2 by fastening means, here screw connections 27. The length of the saw bar 20 is matched to the thickness of the masonry 26. The length of the sword is chosen according to the thickness of the masonry to be worked. The saw blade 20 of the chainsaw 2 is preferably cooled in operation by means of a cooling liquid. Water, for example, is suitable as the cooling liquid. For certain applications, the saw bar 20 can have channels (not shown in detail) which run inside and which serve to guide the coolant to suitable locations.

FIG. 4 shows the arrangement according to FIG. 3 in a simplified illustration. The chain saw 2 and the saw bar 20, which has a certain width B, are shown in a side view. As can be seen, the saw blade 20 is inclined here by an angle α with respect to the second guide rail 11. The angle α is typically 0 ° to 45 °. The sawing area S covered by the saw bar 20 is determined by the angle α and the length L of the saw bar 20 arrangement. If the saw blade 20 of the chain saw 2 is moved along the second guide rail 11, the saw blade sweeps over a sawing area S which is determined by the angle α and the length L of the saw blade 20. The effective sawing areas S can be determined by the choice of the angle α. In the embodiment shown here, the angle α is constant during the sawing. However, the device can also be designed in such a way that it can be actively changed during sawing.

A path 28 schematically illustrates a preferred way in which the saw blade is spatially guided in order to create a cut 21 of a certain length K according to the method according to the invention. The path 28 is composed of regions 28.1 which run essentially parallel to a wall 15, regions 28.2 which run essentially perpendicular to the wall 15 and regions 28.3 which run essentially perpendicularly away from the wall 15. In order to create a cut in a masonry 26, the saw blade 20 is first moved into the masonry 26 essentially in a direction 28.2 perpendicular to the wall 15, starting from an initial position. After reaching a certain penetration depth T, the saw blade 20 is pulled out of the masonry 26 in the opposite direction 28.3. After it has been completely pulled out of the masonry 26, the saw blade 20 is moved parallel to the wall 15 by a certain distance 28.1 in the cutting direction. The distance 28.1 corresponds to the width B of the saw bar 20 and is selected such that when the saw bar 20 penetrates again into the masonry 26 in the cutting direction, there is a slight overlap with the cut already made. This procedure is repeated until the entire cut with the length K has been made. In order to work on critical areas (eg edge zones), the angle α of the saw bar can be adjusted accordingly. The method for creating a cut 21 in a masonry 26 can be represented in a simplified manner as follows. In order to create a cut 21 of a certain total length K between a start and an end position 50, 51 in a masonry 26, in a first method step the saw blade 20 of the chainsaw 2 is placed at the start position 50 of the cut 21 to be made over a surface 15 of the masonry to be sawn 26 arranged. In a second method step, the saw blade 20 is then inserted essentially vertically into the masonry 26 and, after reaching a certain penetration depth T, is guided out of it again. In a third method step, the saw blade 20 is displaced essentially parallel to the surface 15 of the masonry 26 in the direction (here y-direction) of the cut 21 to be made by a certain distance 28.1, which corresponds to the width B of the saw blade 20. These steps are repeated until the entire cut 21 with the length K is created.

FIG. 5 shows a further application of the chain saw device 1. The chain saw device 1 is used here for anchoring bands 30 to a concrete structure 31. In the renovation of concrete structures, especially bridges and other load-bearing structures, carbon fiber tapes are used today. It has proven useful to anchor these tapes with adhesive. In the case of a concrete structure 31, a section of which is shown here by way of example, which e.g. The straps are fastened in openings in the area of bridges as a load-bearing element. Until now, it has been necessary to create a slit-shaped opening by lining up drill holes. This is disadvantageous for several reasons. On the one hand, through openings in particular are difficult to seal against moisture and other influences, and on the other hand, the edges of the slot-shaped openings are not sufficiently smooth due to the row of boreholes. With the chain saw device 1 shown here, it is now possible to create punctures 32 open on one side in a concrete structure 31 which have smooth walls and can be optimally sealed.

Claims

PATENT CLAIMS

1. Chainsaw device (1) for sawing masonry (15, 31) from stone and concrete, with a chainsaw (2), with a saw blade (20), and a holding device (3) for holding and moving the chainsaw (2), characterized in that the holding device (3) has a first guide means (10, 12), a second guide means (11, 13) and a base (13) for receiving the chainsaw (2), which first guide means (10, 12 ) for guiding the second guide means (11, 13) in a first direction (y) and which second guide means (11, 13) for guiding the base (13) with the chain saw (20) in a second direction (x) serves in such a way that the chainsaw can be moved in a controlled manner in two directions (x, y) during sawing and that the saw blade (20) of the chainsaw (2) is supported on one side, such that the saw blade (20) is flush along one Wall (x, y) can be sawn.

2. chain saw device (1) according to claim 1, characterized in that the first guide means (10, 12) consists of a guide rail (10) and a first carriage (12), which first carriage (12) along the first guide rail (10) is arranged to be translationally displaceable, and which second guide means (11, 13) consists of a second guide rail (11) attached to the first carriage (12), which is opposite the first guide rail

(10) is arranged at a right angle, and there is a second carriage (13), which second carriage (13) opposite the second guide rail

(11) is arranged to be translationally displaceable and serves as a base (13) for receiving the chainsaw (2).

Chainsaw device (1) according to one of the preceding claims, characterized in that the holding device (3) has first and second drive means (16, 17), which first drive means (16) for displacing the second relative to the first guide means (10, 12 , 11, 13) and which second drive means (17) is used to move the base (13) relative to the second guide means (11, 13).

Chainsaw device (1) according to one of the preceding claims, characterized in that the saw blade (20) of the chainsaw (2) is arranged parallel to the second guide means (11, 13).

5. Chainsaw device (1) according to one of the claims 1 to 4, characterized in that the saw blade (20) of the chainsaw (2) to the second guide means (11, 13) is arranged at an angle (α) of between 0 ° and 45 ° is.

6. Method for creating a cut (21) in a masonry (26), in particular masonry made of stone and concrete by means of a chainsaw (2) movably attached to a holding device (3) with a saw blade (20), characterized in that for Creating a cut (21) of a certain total length (K) between a start and an end position (50, 51) in a masonry (26), in a first process step the saw blade (20) of the chain saw (2) at the start position ( 50) of the cut to be created

(21) is arranged over a surface (15) of the masonry (26) to be sawn, that in a second process step the sawing sword (20) is pierced essentially vertically into the masonry (26) and again after reaching a certain penetration depth (T) it is shown from this that in a third method step the saw blade (20) in direction (28.1, y) the cut (21) to be created is displaced by a certain distance (28.1) which corresponds to a width (B) of the saw bar (20), essentially parallel to the surface (15) of the masonry (26), and that in further The second and third process steps are repeated until the entire cut (21) is created.