HRP921465A2 - A vertical band saw - Google Patents

Description

The invention relates to a vertical band saw with a machine base, with a recess for receiving the saw band for the material to be cut, as well as with a vertically placed working wheel support over which above and below the area for the material are rotatably arranged working wheels, whose pivot axis is essentially horizontally in relation to the cutting plane inclined by an angle equal to or smaller than 90°, the endless band of the saw rotates and at the same time passes above and below the area for the material through guides, which are connected to the carrier of the working wheels, in order to rotate in the cutting plane, the band being the saw and the material are mutually movable through horizontally directed movements in order to perform the cutting operation and the band of the saw at the point of cutting comes into cutting contact with the material.

With such known vertical band saws, the rotating axes of the working wheels in relation to the cutting plane have an inclination of 45° in the first order, whereby no limitation should be given here. In addition, as a rule, clamping mechanisms for the material are provided, which are primarily placed on both sides of the cutting plane in order to securely hold the material.

Known vertical band saws allow separation of the material to be cut when arranging the cutting planes transversely to the direction of movement of the material. However, cuts at an angle, where the cutting plane is reversed in relation to the direction of movement of the material, are not possible here.

On the other hand, the known vertical band saws, in which the working table of the machine stand is not equipped with clamping mechanisms, are to some extent manual cutting, since the piece of material to be processed is manually brought to an appropriate angular position in relation to the cutting plane determined by the band saw.

In order to make cuts at an angle, cold cutting circular saws are used, where the saw blade, and thus the cutting plane, can be turned to the cutting angle. However, such circular saws for cold cutting have a disadvantage, that the cross-section of the material is limited by the size of the radius of the saw blade in relation to the capabilities of the vertical band saw of the mentioned type, and that the circular saw blade does not have a straight line but rather an arc cutting flow, which makes it impossible to achieve straight cuts, i.e. to achieve completely separating cuts with a straight cutting line.

In any case, circular saws for cold cutting are not suitable for manual processing, i.e. cutting the workpiece in the manner described above.

Therefore, the task of the invention is to create a vertical band saw of the type mentioned above, so that in addition to making straight cuts, it also enables cutting at an angle, with positive and negative cutting angles in relation to the direction of movement of the material. Furthermore, it is necessary to

enable further shaping to interrupt the cutting process, i.e. make partial cuts with a straight line flow. Furthermore, the vertical band saw should have a compact, simple construction, a light construction in terms of the load ratio and, finally, have a particularly convenient arrangement of parts that are related to the cutting process, but on the other hand, the current possibilities of the vertical band saw, especially in terms of of manual cutting described above, should be retained.

According to the invention, this task is basically solved in such a way that the carrier of the working wheel can be rotated around the vertical pivot axis and fixed in any pivoting position.

Due to this measure, according to the invention, the impeller support, and thus the cutting plane, can be adjusted to different cutting angles in relation to the direction of movement of the material to be cut, without moving the impeller support and the related static guidance problems. because the carrier of the working wheel, independent of the adjustment of different cutting angles, remains statically always in its original vertical equilibrium position, which is also particularly important for creating guides for moving the carrier of the working wheel.

The adjustment according to the invention of different cutting angles in relation to the cutting direction, which is normal to the direction of movement of the material, leads to the fact that at these cutting angles the material is cut obliquely to its envelope derivative, which was not done before due to the fear of unclean cuts. However, it turned out that such an oblique cut is quite possible and leads to good results.

Due to the elimination of the problem of moving the weight in connection with the adjustment of the cutting angle of the work wheel support, there is also the possibility of making the work wheel support as a light structure and a compact unit that contains all the necessary components for driving the band saw, such as, first of all, the drive motor, which is flange connected to the support of the working wheel, guides for deflecting the saw band, control and adjustment of the cutting conditions, including the necessary handling equipment for this, etc.

In this way, the vertical band saw can be made as a component unit consisting of the working wheel carrier as well as all the parts necessary for the cutting process, whereby this component unit as a whole can be pivoted in relation to the machine stand or the material, and that with this in any form, static problems do not arise that would be dependent on any position of the cutting angle. In other words, using the object of the invention, a machine with a band saw is obtained, which is equipped with all the essential parts included in the work wheel support and which, in relation to the machine stand, and thus to the reception of the workpiece as well as in terms of displacement in the direction of the material of the workpiece as and with regard to the various adjustable cutting angles it can be freely controlled.

By means of the mentioned conditions, which are achieved by the invention, the working wheel support can also be made to be structurally light and simple, which also includes the guidance and positioning of the working wheel support in relation to the machine base.

It also includes particularly easy handling with low power consumption, i.e. the movement of the working wheel support, which only requires relatively easy dimensioning of the parts for adjustment and guidance.

It proved to be expedient that the pivot shaft was placed vertically. If the rotating shaft goes through the cutting site, it practically forms a line of penetration that is obtained from the cutting plane on one side and the plane of contact with the material that is vertical with the sides of the working wheel support. This has the advantage that through the different adjustment of the cutting angle, the cutting location of the saw band does not change in relation to the material of the workpiece, so that in connection with this, it is also not necessary to take into account correction sizes in connection with the longitudinal adjustment of the material of the workpiece.

For handling the vertical band saw according to the invention, the material can be brought closer to the cutting band in the cutting direction, which could, for example, be realized by means of a horizontally movable slide for receiving the material of the workpiece. Then the material is brought to the cutting belt in the direction of cutting by hand, but also by any other possible movement method.

Basically, another possibility is given in that the carrier of the working wheel can be moved by means of a displacement mechanism in order to move the saw band in the direction towards the material, and thus also in the direction of cutting. This in itself common procedure enables the stationary determination of the material, after which the band saw moves in the direction of cutting through the material by means of the corresponding movement of the working wheel support.

For both of the aforementioned cases, it can be envisaged that the reception for the material will be a machine table with a horizontal resting surface, which in this case can be moved in the direction of cutting, whereby the machine table is made using a machine stand or can be placed on it.

Here, the machine table can be a rotary table that can be rotated with the impeller support, and it can be provided that the rotary axis of the rotary table and the rotary axis of the impeller support coincide.

For the reception of the material to be cut, it is expedient that the reception for the material to be cut on the side of the material, which is facing the support of the working wheel, and on at least one side of the cutting plane of the saw band, is a fixed bridge with an almost vertical clamping surface for the material. In this way, the material can be positioned in a defined manner parallel to its longitudinal extension, so that the movement of the material reception in the direction towards the saw blade and parallel to the cutting direction would lead it or to allow the cutting movement of the working wheel support, thus the saw blade in the form in which the material is located in a pre-given, defined position using the appropriate bridge.

In the sense of the above, it is expedient here that the rotating axis of the working wheel support is located in the plane of the clamping surface of the corresponding bridge. Thus, the clamping surface is a vertical abutting plane on the work piece of material in which the rotating axis of the work wheel support lies, so that regardless of each position of the work wheel support, the place of the cut between the saw band and the material always remains the same and accordingly makes unnecessary the correction that depends on the cutting angle .

In order to further form a firm tightening of the material during the cutting process, it is convenient to place a clamping shoe opposite the clamping bridge, which clamps the material horizontally to the clamping surface of the clamping bridge, can be opened and closed and has a vertical clamping surface. With the help of this clamping shoe, the material can be tightened against the clamping surface of the corresponding bridge.

However, in this frame, the clamping surface in the cutting direction of the saw bands forward can be inclined towards verticals. This design allows for a wedging effect, which is created by the cutting force of the saw band, between the material and the clamping shoe, i.e. its clamping surface, which additionally serves to hold the material in place during the cutting process. In order to allow sufficient freedom of movement for the saw band in relation to the clamping shoe transversely to the cutting plane, for obvious reasons, it is expedient that the clamping shoe on the side facing the saw band has, in a given case, a replaceable material for easy cutting of the saw band, so that the saw band does not find an obstacle in the clamping shoe for complete penetration of the material, as well as in the case of a slightly oblique position of the saw band.

As an alternative to the previous one, it can be foreseen that a clamping foot is placed next to the cutting plane, which holds the material vertically on the machine table and can be opened and closed. This type of vertical clamping shoe, which can be constructively combined with an adjacent bridge, gives another possibility, especially with regard to the complicated surface of the workpieces, which in a given case cannot be covered using a horizontal clamping shoe.

It is understood that with a vertical band saw, both horizontal and vertical clamping shoes can be provided together to be used alternatively or jointly.

Furthermore, it is expedient that the band saw guide, which is placed below the material area, is stationary on the work wheel support, and the saw band guide, which is placed above the material area, can be adjusted and fixed on the work wheel support in the direction of movement of the saw band. Both guides can, therefore, in the sense stated above, be an integral part of the work wheel support and on the other hand enable the narrowest adjustment in terms of each cross-section of the workpiece or material so that the saw band is always guided directly next to the material and is supported according to the cutting force. Neither a horizontal nor a vertical clamping shoe stands in its way.

In order to produce the amount of displacement in the cutting direction between the working wheel support, i.e. the saw band on one side and the material on the other side, the working wheel support can move in the cutting direction along the horizontal guide, which can be turned and adjusted around the vertical pivot axis. This also makes translational movement of the working wheel carrier in the cutting direction relative to the material possible.

Another possibility consists essentially in the fact that the carrier of the working wheel can be rotated about a pivot axis that can be pivoted and fixed about a vertical pivot axis and is placed transversely to the cutting direction and horizontally.

So, while in one case the carrier of the working wheel moves translationally in the direction towards the material and the belt is guided through the material while maintaining its direction of movement, in the other case, a pivoting movement is provided for the carrier of the working wheel around the bearing axis, which is embedded under the material, of the carrier of the working wheel so that the support of the working wheel, and thus the band of the saw, would move in an arc through the material during the cutting process.

For both displacement possibilities, it can be provided that the horizontal guide or the pivot axis is placed on the machine part that can be rotated on the machine base around the vertical pivot axis. Here, therefore, a machine part is provided on the machine base for positioning and guiding the impeller carrier, whereby the machine part can be rotated around the vertical pivot axis according to the invention, and thus via the guide, i.e., the pivoting mounting of the impeller carrier, the impeller carrier itself moves with itself in relation to rotary adjustment around the vertical axis.

Various forms are imaginable for making the machine part. Furthermore, several possibilities will be mentioned without thereby limiting the scope of the subject of the invention.

They have one thing in common, that this type of machine part can be easily and in a well-known way pivoted on the machine stand, so that the high requirements in terms of accuracy and freedom of operation are met.

Thus, the machine part can be the already mentioned rotary table, which gives us support for the material to be cut as a unit that rotates together, and thus as a constantly available unit that is largely independent of the cutting angle.

For a normal case, it is indeed conceivable that the receiving of the machine part for the material has such a recess for the band saw that frees the entire area of displacement of the band saw including the intended area of different cutting angles. When designing the machine part as a rotary table, which carries a horizontal guide, i.e. a pivot axis for the support of the working wheel, it can, starting from the center, i.e., a vertical pivot axis in the direction of movement of the saw band, have a notch for the passage of the saw band, since this notch is adjusted with the cutting angle of the support of the working wheel and thus the saw band always allows its freedom of movement, and on the other hand, the support for the working pieces of material is constantly reduced only by the size of the notch, which is precisely why it is possible to process shorter pieces of material.

In order to ensure the necessary freedom of movement for the working wheel support in relation to the rotary table, it is only necessary that the turning table, starting from its center of rotation in the direction towards the working wheel support, has an almost quarter-circle recess for receiving the working wheel support and parts, which are in the plane of the turning table table connected to it, as well as to free up space for the movement of the working wheel carrier between its two outer displacement positions. Thus, the recess of the rotary table is in the plane of the rotary table adapted to the outer contour of the working wheel support, including the parts that are connected to it, so that the quasi support of the working wheel inside the rotary table, which simultaneously carries the horizontal guide or the rotating guide of the working wheel support, is freely movable. in terms of maximum displacement.

Since this recess of the rotary table in relation to the work piece or the material is located almost behind the stationary bridge, in this way the abutment or support of the work piece on the rotary table is not endangered.

Regarding the mounting of the machine part or the rotary table, which has a horizontal guide or swivel guide of the working wheel support, it is expedient for the machine part or the rotary table to be mounted on the machine base so that it can rotate along its circumference. Here it can be foreseen that the machine part or the rotary table has an extension, which is in the shape of a circular cylinder and extends downwards, that the extension on its lower part inside and outside has a guide groove that surrounds horizontally and that the guide rollers are connected to the guide groove, which are on the machine base around the vertical axes, positioned so that they can be rotated. In this way, on a proportionately large volume, the embedded guidance of the machine part, i.e. the rotary table, is ensured both in the horizontal and vertical direction, which can be made sufficiently safe from rotation and stable, but it is also ensured that it does not get dirty or is threatened by waste sawdust from cutting.

Another possibility consists in the fact that the machine part or the rotary table is rotatably mounted in the area of the base of the machine base, where it can be provided that the machine part or the rotary table is connected to the horizontal base plate via vertical support parts and that the base plate on the machine on the base over the radial-axial bearing, it is rotatably mounted. The previously mentioned advantages apply accordingly to this swivel bearing.

If it is a horizontal guide for the support of the working wheel, it can be provided that the horizontal guide of the support of the working wheel consists of a guide rod which includes the corresponding part of the support of the working wheel, as well as a swivel guide placed parallel to it, or a guide for securing against twisting, into which the end of the supporting the arm starting from the leading part of the impeller support.

Through the design of the horizontal guide, a particularly simple construction has been achieved, which can be made from common components, but which, on the other hand, ensures maximum stability and securing the working wheel support from moving from its vertical position.

At the same time, the guide bar can have an essentially circular cross-section, which results in a particularly simple production of a horizontal guide.

For the ability to pre-rotate the working wheel carrier in the cutting direction around the pivot axis, it is convenient that this pivot axis in the direction of cutting the band saw is guided horizontally so that it can be adjusted and moved. With this, it can be achieved that the cutting strip, after separating the material of the work piece at the end of cutting, takes a vertical direction of movement, which proves to be particularly good compared to a horizontal clamping shoe. In this case, the pivot axis can be adjusted using the adjusting spindle, which is mounted on the machine part so that it can rotate, but is axially stationary.

For both of the previously described possibilities of moving the saw band in the direction towards the material, both for horizontal movement and for movement with rotation, it is expedient that the parts for movement are hinged on one side on the machine part and on the other side on the support of the working wheel so that they can be rotated, the moving parts can be a cylinder-piston assembly or an adjusting spindle.

In order for the amount of displacement for the working wheel support to be adjusted depending on the cross-section of the material to be cut, in the case of a horizontally guided working wheel support, it is convenient to place at least one stop parallel to the horizontal guide on the machine part to limit the movement and in the given case of rotation working wheel support. At the same time, the limiter can be adjusted by means of adjustment spindles that are rotatably mounted on the machine part, and stop noses that are at least indirectly firmly connected to the working wheel support can participate with the limiter.

Such limiting means in particular allow the movement of the saw band to be limited in such a way that the material itself is partially cut, i.e. the material is not separated completely, which is necessary when it is necessary to make cuts in the material, in which case such cuts are made using the vertical band saw according to the invention from different positions of rotation of the working wheel support in combination with different positions of displacement of the material of the workpiece can be made in its longitudinal direction, since the corresponding material is cut in two different places at different cutting angles by means of a band saw.

The workpieces of the material to be cut have different cross-sections. On the other hand, it starts from the vertical band saw in the corresponding vertical cutting line. In matching the cutting lines/cross-section of the workpiece to be cut, it can be obtained that the cutting band meets the upper surface of the workpiece during the notch, which simultaneously brings numerous teeth of the band saw into contact with the workpiece material, which is basically the same for a clean notch problematic at which cutting angle the saw blade meets the material.

To the same extent, in case of vertical cutting arrangement, unfavorable relations between the largest and smallest cutting lengths are obtained for cutting different profiles, which leads to a reduction of the cutting effect that can be achieved.

In order to solve these problems within the scope of the invention for a horizontally guided impeller support according to one of the following features, it is provided that the impeller support can be rotated in relation to its horizontal guidance and, in relation to the position of rotation, be fixed around an axis that is horizontal and placed is transverse to the cutting line. In doing so, it is convenient for the pivot axis of the working wheel support to be placed in the middle area between the two vertical arms of the saw band.

With this, it was achieved that depending on the shape of the cross-section of the material to be cut, the support of the working wheel for an angle, which can normally range between 0° and 3°, but for which an order of magnitude from, for example, 5° to 10° is conceivable, in the direction towards the work piece so that it can be rotated, so that the band saw with only a small engagement length for the notch encounters the work piece, as a result of which at first only a few teeth of the band saw are engaged with the work piece of material, which quickly leads to good guidance of the band saw in cutting area, and thus to a clean cut. Through this change in the ratio of the length of the cut, an increase in performance is obtained when cutting profile materials.

For the constructive shaping of this swiveling of the working wheel support, it is suitable for the working wheel support on its leading part, which works together with the longitudinal guide, to be hinged so that it can be turned or turned and that it can be fixed in relation to the position of turning or turning. Here it can be provided that in order to adjust and fix the rotation of the impeller carrier between the impeller carrier and the guide part, an adjustment mechanism is used, which, for example, can be made as an adjustment shaft.

The previous problem with regard to a possible oblique cut of the material is in fact related to the horizontally guided support of the working wheel. With the support of the working wheel, which can be rotated around the pivot axis placed under the work piece of material and which is located in the displacement mechanism, i.e. in the cutting direction, this problem is solved through the beveled cutting position of the saw band in relation to the material, which is obtained from the rotation of the support of the working wheel wheels.

In order to finally limit the movement of the working wheel support, regardless of whether this movement is achieved through horizontal movement or through rotation around the pivot axis, a control lever can be provided on the machine base, which protrudes into the movable area of the edge or surface of the working wheel support and which can be adjusted in regarding the size of the displacement of the working wheel support, which is determined by the cross-section of the material. So, here, in contrast to the previously discussed limiter, it is an end limiter whose adjustment depends on the cross-section of the material to be processed and which ensures that the working wheel carrier is always switched off after separating the material and, in a given case, returned.

As mentioned several times before, the vertical band saw is suitable due to its basic construction, first of all, for performing so-called manual cuts, i.e. such cutting operations in which the material is brought to the saw band manually via the material reception with manual control. It is especially useful for this if the carrier of the working wheel in its

in the moving position, which is completely forward in relation to the cutting direction, it can be blocked, since then the workpiece can move freely in relation to the saw band, far unhindered by the following components of the vertical band saw. In this regard, the vertical band saw according to the invention also offers special advantages that apparently all machine parts are kept outside the material receiving area and can move freely in relation to the saw band.

In short, a vertical saw has been created through the invention, which in a simple way enables all work operations, which occur when cutting material, especially standard material, without it being a complicated, difficult to handle, with a large constructive expenditure and an expensive machine. Far more, through the measures according to the invention, a simply constructed machine is obtained which, in terms of handling, can be easily started, which can be made cheaply and simply, without compromising in any way its universal applicability or usability.

Further features and details essential to the invention are obtained from the following description of the embodiment shown in the drawing, wherein the views are limited to the reproduction of essential parts only, neglecting the details.

Figure 1 shows the overall perspective view of a vertical band saw;

Figure 2 shows a side view of the machine from Figure 1;

Figure 3 shows a front view of the machine of Figure 1;

Figure 4 shows a top view of the machine of Figure 1;

Figure 5 shows the appearance of a vertical section through the machine along the V-V line from Figure 4;

Figure 6 shows the appearance of a section of the machine along line VI-VI from Figure 4;

Figure 7 shows a variant of the machine in the view according to Figure 5;

Figure 8 shows a cross-sectional view of the machine along the cross-section line VIII-VIII from Figure 4;

Figure 9 shows a supplemented and differently presented top view of the machine according to Figure 4;

Figures 10 to 15 show different working positions of the machine according to Figures 1 to 9 in a simplified top view;

Figure 16 shows the structural deviation of the vertical band saw in cross-section in the manner of Figure 5;

Figure 17 shows a sectional side view of the machine according to Figure 16 in section in the manner of Figure 8;

Figure 18 shows the following structural deviation of the machine in cross-section in the same way as in Figure 5;

Figures 19 and 20 show a side view of the machine in two working positions in a sectioned manner as in Figure 8;

Figure 21 shows the following constructive deviation of the vertical band saw in the side section in the manner as in Figure 8 and

Figure 22 shows the next variant of the machine with a constructive form according to Figure 21.

First, we will consider the different layouts of the vertical band saw according to the invention from Figures 1 to 4.

Here you can see the machine stand 1, with the work table in the form of a rotary table 2, the material 3 in the form of cutting bars is fed over the guiding surface 4, for example, via the guide roller, and the material separated from it is separated from it by means of the guiding surface 5, in this example of a roller guide, further transports.

The working wheel support 6 is placed on the machine stand 1. This one has an upper working wheel 7 and a lower working wheel 8, over which the endless band 9 of the saw circulates. The rotating axis 10 of the working wheels are inclined in relation to the cutting plane 11, which can be seen in Figures 1 to 4, by an angle smaller than 90°, in the attached case 45°.

Guides 12/see Figures 5, 7/ and 13 are used to rotate the band saw 9 in the cutting plane 11, where the guide 12 is immovably placed under the adjacent plane of the workpiece on the support 6 of the working wheel, while the guide 13 corresponds to the direction of arrow 14 in the picture 1 placed on the support of the working wheel in the guide 15 so that it can be moved vertically and fixed. The possibility of fixing the guide 13 of the band saw inside the guide 15 is not shown in detail. This can be, for example, a clamping nut or the like.

To hold the material 3 to be cut on the rotary table 2, the corresponding bridge 16 is used, which is immovably placed on the work table of the machine stand 1 on the sides of the support 6 of the working wheel and which, in the attached case, consists of two segments that allow the passage of the tape 9 in the middle saw in the direction towards the working piece of material 3 by means of one notch 17. The parts of the corresponding bridge 16 are firmly connected to the machine base 1 outside the rotary table 2 and allow free movement of the rotary table 2 between these connections.

From the outer ends of the parts 16 of the corresponding bridge, guide rods 17', 18 protrude horizontally transversely to the direction of movement of the workpiece material 3, along which the clamping shoe 19 can be moved, which clamps the workpiece 3 of the material towards the vertical clamping surface 20 of the corresponding bridge with its own vertical clamping surface 21 The clamping shoe 19 can be fixed on the guide rods 17 and 18 by means of clamping nuts 22, 23, which can be activated manually.

The clamping shoe 19 can, as shown in Figure 2, also have a clamping surface 21' which is inclined to the cutting direction of the band saw from top to bottom, starting from the band saw in relation to the vertical. In this way, the wedging effect, which is realized by the material and the clamping shoe, can be used in terms of better holding of the workpiece.

Alternatively or as a supplement to the clamping shoe 19, a vertical clamping shoe 55 can be provided which, as indicated in Figure 2, on the holder 56, which is fixed on the corresponding bridge 16, can be moved normally by means of the adjusting shaft 57, whereby the adjusting shaft 57 can be activated by hand using the cross handle 58. At the same time, the seat 59 of the adjusting shaft can be made so that it can rotate around the holder 56 and vary in its horizontal length so that different distances between the holder 56 and the adjusting shaft 57 can be adjusted.

In order to carry out the working operation of cutting, as shown first by the double arrow only by means of figure 1, the carrier of the working wheel 6 can move along the arrow 24 horizontally in the direction towards the material 3 to be cut. In order to ensure the necessary freedom of movement for the impeller support inside the rotary table, the rotary table 2 has a recess 25 in the shape of a quarter circle corresponding to the horizontal outer contour of the impeller support 6 together with the parts connected to it in the area of the plane of the rotary table.

Furthermore, the support of the working wheel can be rotated along the arrow 26 in relation to the vertical, whereby during this rotation the band saw 9 with its part lying between the guides 12, 13 lies within the cutting plane.

Finally, the rotary table 2 can be turned or pivoted along the arrow 27, whereby the working wheel support 6 makes the same rotation so that the cutting angles can be adjusted according to the material 3 to be cut. The swivel position of the rotary table 2 can be locked at any desired angle. For such blocking, known means can be used. Here, for simplicity, the handle 28 of the corresponding clamping mechanism is shown.

Finally, it should be emphasized that the swivel axis 29 of the rotary table 2, and thus the cutting plane of the band saw 9, lies in the clamping surface 20 of the corresponding bridge 16, so it coincides with the line along which the workpiece material 3 is cut. In this way, the cutting point of the work piece 3 is always in the same place, regardless of the tilted position of the rotary table 2 and the work wheel support 6. This eliminates the need to take into account the different positions of the work table 2 and the work wheel support. take into account the different places where the work piece of material is cut. This is important for adjusting the measuring stops for the material workpiece, since then, depending on the adjusted angle, the length correction does not have to be done there.

In order for the band saw 9 to move without collision during the movement for cutting inside the rotary table 2, the rotary table 2 has a slot 30 for the saw band which rotates together depending on the angular position of the rotary table and the working wheel support. This slot 30 ensures that the contact surface of the work piece of material 3 on the rotary table 2 is as large as possible.

Further details first the basic explanation of the construction of the vertical saw including its basic way of functioning should be explained in more detail using the other drawings.

First of all, with the help of drawings 5 to 8, we will focus on the positioning of the support of the working wheel 6 in relation to the displacement along the arrow 24 in Figure 1.

As can be seen in Figures 5, 7 and 8, the rotary table 2 has a guide bar 31 with an almost circular cross-section connected via an extension 32, i.e. a vertical support part 32', which extends downwards from the workpiece contact area and has the shape of a circular cylinder. On the guide rod 31, the carrier of the working wheel 6 with the guide part 33, which completely encompasses the guide rod 31, can be moved parallel to the cutting plane. In order for the carrier of the working wheel 6 on the guide rod 31 not to be able to rotate from the guide part 33, the support lever 34 goes, which with its free end penetrates the guide 35 for securing against twisting, which is placed on the rotary table 2 parallel to the guide rod 31.

The movement is carried out by means of a cylinder-piston unit 36, which on one side rotates against the circular-cylindrical extension 32, i.e. the supporting parts 32', while on the other side it is articulated on the leading part 33, which is connected to the support of the working wheel 6.

In this way, a simple and inexpensive guide is obtained, which is to produce displacement for the support of the working wheel.

Figures 5 and 7 show at the same time different positions of the rotary table 2, and thus of the support of the working wheel 6 over the guide rod 31.

Thus, according to Figure 5, the rotary table 2 on its circular-cylindrical extension 32 in relation to its lower end is provided with guide grooves 37, 38, which horizontally surround it inside and outside and into which the guide rollers 39, 40', which are on the machine base and positioned so that they can rotate around vertical axes. As can be seen in Figure 9, these guide rollers are distributed multiple times around the circumference of the rotary table. This results in a large volume on the one hand, and thus a stable seating of the rotary table 2, very safe from rotation, as well as on the other side of the support of the working wheel 6 and the machine parts connected to it.

Another form of execution is shown in figure 7. There, the rotary table 2 is connected to the support parts 32' which protrude downward and which are connected to the base plate 40, which are again via the bearing 41, rotatably placed on the machine base. The rotary axis 29 which is explained in connection with Fig. 1 and shown once again in Fig. 7.

In addition, figures 5 and 7 show boundary parts 42, which are placed parallel to the horizontal guide of the carrier of the working wheel 6 on the rotary table 2 in order to limit and in this case the rotation of the carrier of the working wheel 6 in the direction of movement along the guide rod 31. These border parts, which can be moved on the guide 61, they can be adjusted by means of the adjusting shaft 60, which is mounted on the rotary table 2. Stop noses 62 participate with them, which are connected to the guide part 33, and thus indirectly to the support of the working wheel. In this way, the movement of the support of the working wheel 6 can be limited as desired so that deep partial cuts can be made in the material, i.e. such cuts where the material is only partially separated. If then, after the displacement of the material 3, at the second corresponding angular position of the plane 11, a partial cut of the same depth is made, then in this way a wedge-shaped recess can be made in the working piece of material.

With the help of Figures 1 to 4, the possibility of a tilted position along the direction of the arrow 26 in relation to the carrier of the working wheel 6 is further mentioned. In order to achieve this, as particularly shown in Figure 6 in connection with Figure 8, the guide part 33 is interrupted so that the carrier of the working wheel 6 on the leading part can turn or rotate and be fixed in relation to the rotating or tilting position.

For this, according to Figure 6, the guide part 33, with which the carrier of the working wheel 6 with the guide rod 31 is connected, is interrupted by means of a swivel connection 43, which is known per se, whereby, as seen in Figure 2, the axis 44 swivel links placed in the middle area between both vertical arms of the band saw 9.

The segment of the guide part 33, which is placed on the part of the swivel connection 43 on the side towards the working wheel support and on which the cylinder-piston unit 36 is articulated, and between the working wheel support 6 is used to adjust the tilting position of the working wheel support 6 in relation to the horizontal guide. set adjusting mechanism 45, which consists of a fork fixed on the support of the working wheel and fork arms 46 in front of the support of the working wheel, and allows the adjustment of the tilting position of the support of the working wheel 6 by activating the adjusting shaft 47, which engages with the thread on the part 33 and on the arms of the fork is rotatably but axially fixed in a way that is not shown in detail. Through the adjustment of the adjusting mechanism 45, the pivoting position inside the rotary link 43 is blocked at the same time.

With regard to the normal limitation of movement for the saw band 9 depending on the always available cross-section g of the material 3, we will return to another representation in Figure 4. There we can see the control lever 49 shown in dashed lines and which is placed under the rotary table 2 on the machine base 1 so that it can be rotated. This control lever, which can be positioned or adjusted by hand in a known manner and fixed by means of a clamping nut 63, can be engaged by a part of the working wheel support 6, so that when this part of the working wheel support is struck, the band of the saw moves with the action of known control means it can be interrupted and, in a given case, turned around.

In the introductory description, the possibility of manual sawing was also considered. For this, a solution of a movable clamping foot 19 with guide feet 50 visible in Figure 1 with the help of clamping nuts 22, 23 is possible, so that with the appropriate solution, the clamping connection of the rotary table 2 using the lever 28 at the workpiece, which is located on the rotary table 2, the movement of the material 3 can be done manually, while at the same time the operator, by turning the rotary table 2 and thus the guide 6 of the band saw, can separate the workpiece with the corresponding desired contours. So, for this manual cutting, the described machine does not create obstacles after removing the clamping shoe 19. In order to carry out such manual cutting, the carrier of the working wheel is also brought to its front position and fixed there so that the saw band is freely accessible from all sides.

Fig. 9 shows another top view of the vertical band saw according to the invention with as complete a view as possible of the machine components located below the working plane. It can be seen from this that the drive motor 51 is connected to the working wheel support as a component unit. In addition to the available components not shown, there is also a control panel for adjusting the operating and moving quantities. In this way, in particular, figure 9 clearly shows how the working wheel carrier, together with all the necessary devices and units for driving the saw band, is created as a quasi-independent cutting unit that can be moved on the rotary table, and thus also on the machine stand, and which in its the freedom of movement in terms of action on the workpiece is in no case restricted in order to achieve the desired angular cuts, partial cuts, hand-cut contours, etc. on the workpiece. Thus, the vertical band saw proves itself in all the demands placed on the machines, with respect conditions that are optimal for cutting the workpiece.

Using Figures 10 to 15, a simplified top view of the various corner cut options is once again shown, always omitting the adjustable clamping shoe 19 to indicate the corresponding hand cut options.

According to Figures 10 and 11, the vertical band saw is shown on the one hand at the beginning of cutting and on the other hand at the end of cutting in relation to the maximum cross-section of the workpiece. Thus, here the carrier of the working wheel 6 is shown once in the starting position and on the other hand in the maximum possible displaced position, whereby the maximum possible displaced position according to Figure 11 also shows how the outer contour of the carrier of the working wheel together with the associated parts in the area of the rotary table corresponds to the recess of the rotary table 2 in the form of a quarter circle. Figures 10 and 11 show the cutting plane normal to the clamping surface 20 of the corresponding bridge 16, i.e. transverse to the direction of movement of the workpiece.

In contrast to this, Figures 12 and 13 show a rotating position where the cutting plane occupies an angle of approximately 45° to the mentioned direction of movement of the workpiece, and this angle is measured backwards to the direction of movement of the material.

On the other hand, Figures 14 and 15 show another rotating position of the working wheel support 6, where the cutting plane of the band saw is measured for a cutting angle of about 20° in relation to the direction normal to the direction of movement of the workpiece, this time forward in relative to the direction of movement of the material.

Figures 12 and 13 in particular clarify the following: If the cutting strip has to be replaced, then there must be as much access and movement as possible to retrieve and replace the old strip with a new one. For this, it is precisely in the position of the machine according to figures 12 and 13 that a particularly suitable way can be approached from the side of the vertical band saw to the working wheel support, without the adjacent bridge 16, clamping feet 19, etc., standing in the way.

This is especially true if the machine is placed on the wall in a manner not shown here, with its back, that is, on the left side in relation to pictures 12 and 13, so that the machine cannot be reached from the back.

Furthermore, further forms of implementation of the subject of the invention will be explained, which are shown in a simplified manner in Figures 16 to 22, and essentially the same explanations and ways of functioning apply to these forms of implementation as in Figures 1 to 15.

While by means of figures 1 to 15 the structure of the support of the working wheel 6 is always movable horizontally on the machine part in the form of a rotary table 2 in the direction towards the material 3, other possibilities are conceivable for this movement. One of these possibilities is explained by the display in Figures 16 and 17.

Here, the carrier of the working wheel 6 with its lower end by means of the shaft 65 is mounted so that it can be rotated around the axis 66, whereby the axis 66 extends horizontally across the cutting plane determined by the saw band 9. The shaft 65, for its part, sits in the support parts 67 in the form vertical shoulders of the crankshafts, which are placed on both sides of the working wheel support 6, which are fixed on the lower side of the rotary table 2 in an incompletely shown way.

Around the axis 66, the carrier of the working wheel 6, which can be seen in particular in Figure 17, can be rotated above the cross-sectional area of the material to be cut, whereby the rotation is performed by the cylinder-piston aggregate 67, which is on one side on the rotary table 2, and on the other side on the support of the working wheel 6 is hinged so that it can be rotated.

As can be seen in this case as well, the support of the working wheel 6 can be rotated around the previously detailed vertical axis 29 together with the turning table 2 in the manner already described.

With this form of execution, there is also an advantage, that the workpiece material 3 is always notched when the band saw 9 is rotated, so that only a few teeth of the band saw 9 come into contact with the material 3 during the notching process. In any case, the constructive form according to Figures 16 and 17 leads to the fact that at the end of the splitting cut the saw band 9 also has a rotated position towards the material 3 so that in a way, which is not explained in detail, but explained with the help of figures 1 to 4, the clamping shoe 19 must consist of a material that is easily cut in order to band saw 9 could be cut into this material, which can be replaced after a certain time.

In order to meet these issues, measures are provided according to the modified structural form in accordance with Figures 18 to 20.

Here again the carrier of the working wheel 6 is fitted with its lower end on the shaft 17 so that it can be rotated around the axis 71, whereby the shaft 70 can be moved horizontally via the guide pedal 72, 73 into the supporting parts 74 which are on their side in a way that not shown in detail, resting on the lower side of the turntable 2.

The axis 71 again lies transversely to the cutting plane, which is always determined by the saw band 9. The movement of the foot 72, 73 is carried out by means of the adjusting shafts 75, 76, which, in a manner not shown in detail, are embedded in the machine base 1 so that the drives can also rotate into a rotating motion.

As can be seen in Figures 19 and 20, the adjustment shafts 75, 76 can be used to adjust such points on the base of the working wheel support 6 that the saw band 9 stands vertically at the end of the cutting process.

Here, Figure 19 shows for a partial cut such a cutting process where the workpiece 3 is only partially separated. In contrast to this, Figure 20 shows the case where the saw band in its vertical position just separates the workpiece 3.

Also for the construction according to figures 18 to 20, the constructive boundary conditions apply, as already explained with the help of figures 1 to 4 and mentioned here once again with the application of the numbering there.

The movement of the support of the working wheel 6 is also carried out in the example of execution according to Figures 18 to 20 by means of the cylinder-piston unit 77 which is movably articulated on one side on the machine base in the form of a work table 2 and on the other side on the support 6 of the working wheel.

While in previous embodiments, the maneuverability of the working wheel carrier 6 around the vertical axis 29 is always shown via the machine part in the form of a rotary table, which is rotatably mounted on the machine stand 1, there are also various possibilities for this. One of these possibilities is shown in figure 21. There, the machine part is made as a C-shaped frame 80, whose lower arm 81 with its free end is mounted on the machine base 1 via a swivel bearing 82 so that it can be rotated in relation to the axis 29.

On its upper, horizontal arm 83, the support of the working wheel 6 is brought so that it can be moved by means of a bushing 84' thereon, this guide, as already explained in detail by means of figures 5 to 8, can be made including the additional mobility of the support of the working of the wheel 6 around the axis 44 by dividing the leading part 33 by means of the part 43, which is mounted on it and can be turned around the axis 44, whereby the rotation can be done by means of the adjusting mechanism 45 by means of the adjusting shaft 47.

In the case in Figure 21, the movement of the carrier of the working wheel 6 is carried out by means of the cylinder-piston unit 84, which is rotatably articulated on one side on the free end of the upper arm 83 of the C-shaped frame 80 and on the other side on the carrier of the working wheel 6.

The embodiment according to Fig. 21 obviously represents an example by which a workpiece of material, which is not shown, can only be supported by the guide paths 4, 5, as shown in Fig. 1, so that it is free in the area of the machine base 1.

Finally, figure 22 once again shows in a very simplified form one variant of the object according to figure 21, which differs in that the upper arm 83' of the C-shaped frame in the direction of movement of the support of the working wheel 6, i.e. of the saw band 9, has a downwardly directed inclination by which mobility in the direction towards the workpiece can be assisted by means of the gravity component. In the rest, for the example of execution according to figure 22, the explanations for the other figures, and especially for figure 21, apply.

For all vertical band saws, which are shown in Figures 1 to 22, it should be pointed out that in the area in front of the corresponding bridge 16, i.e. almost in the area in front of the support of the working wheel in its return position, there is a completely free area for the processed material, i.e. they do not stand on it machine parts, which is especially important for the repeatedly discussed manual cutting method. As for the machine stand 1, it is, as can be seen from the view in Figure 2, conveniently made for the operator so that he can without difficulty approach the machine stand very close and turn unhindered towards the work piece of material to be processed.

Using the form of execution according to figures 21 and 22, it is particularly pointed out that here work is done without one rotary table or a special machine table formed by the machine part. This can in special cases be very expedient since cutting shavings and similar dirt and waste pieces can fall unhindered down into the machine stand 1. Here we should point out the special cases of cutting other parts of the material, in this example of the profile in connection with guiding the material over roller paths .

Claims (42)

1. A vertical band saw with a machine stand, further with a recess for receiving the saw band for the material to be cut, as well as with a vertically placed working wheel support over which above and below the area for the material are rotatably arranged working wheels, the axis of rotation of which is essentially horizontal in relation to the cutting plane inclined by an angle equal to or smaller than 90°, the endless band of the saw rotates and at the same time above and below the area for the material it passes through the guides, which are connected to the carrier of the working wheels, for turning in the cutting plane, whereby the band the saw and the material are mutually movable through a horizontally directed movement in order to perform the cutting operation and the band of the saw at the cutting point comes into cutting contact with the material, indicated by the fact that the support, /6/ of the working wheel can be rotated around the vertical pivot axis /29/ and in each can be fixed in a pivoting position. 2. Vertical band saw according to claim 1, characterized in that the rotating axis /29/ is positioned vertically. 3. Vertical band saw according to claim 1 or 2, characterized in that the rotating axis /29/ goes through the cutting point. 4. Vertical band saw according to claim 1, characterized by the fact that the material /3/ in the cutting direction /24/ can be moved towards the band /9/ of the saw. 5. Vertical band saw according to claim 1, indicated by the fact that the carrier /6/ of the working wheel can be moved by means of a displacement mechanism in order to move the saw band /9/ in the direction towards the material /3/, and thus in the cutting direction /24/. 6. A vertical band saw according to claim 1, indicated by the fact that the reception for the material /3/ in this case is a machine table, which can be moved in the cutting direction, with a horizontal contact surface. 7. Vertical band saw according to claim 6, indicated by the fact that the machine table is realized using the machine stand /1/, i.e. it is placed on it. 8. Vertical band saw according to claim 6, characterized by the fact that the map table is a rotary table /2/, which can be rotated with the working wheel support /6/ and that the turning axis of the turning table coincides with the turning axis /29/ of the working wheel support . 9. Vertical band saw according to claim 1, characterized by the fact that the reception for the material /3/ to be cut is on the side of the material, which faces the carrier /6/ of the working wheel, and on at least one side of the plane /11/ of the band cutting /9 / the saw has a fixed bridge /16/ with a vertical clamping surface /20/ for the material. 10. Vertical band saw according to claim 9, characterized in that the axis of rotation /29/ of the support /6/ of the working wheel is located in the plane of the clamping surface /20/. 11. Vertical band saw according to claim 9, indicated by the fact that the bridge /16/ is placed opposite the clamping shoe /19/ which has at least one vertical clamping surface /21/ which horizontally pulls the material /3/ towards the clamping surface and can be opened and close. 12. Vertical band saw according to claim 11, indicated by the fact that the clamping surface /21'/ in the direction of movement of the band /9/ of the saw is inclined forward from the band of the saw in relation to the vertical. 13. Vertical band saw according to claim 12, characterized by the fact that the clamping shoe /19/ on the facing side of the saw band /9/ has, in the given case, a replaceable material for easy cutting of the saw band. 14. Vertical band saw according to claim 6 and 9, characterized by the fact that, in addition to the corresponding bridge /16/ next to the cutting plane /11/, at least one clamping shoe /55/ is added, which vertically tightens the material towards the machine table /2/ and can be realized and close. 15. Vertical band saw according to claim 1, indicated by the fact that below the area of the material, the band saw guide /12/ fixed on the support /6/ of the working wheel is placed, and above the area of the material, the band saw guide /13/ is placed on the support of the working wheel in the direction movement of the saw band /9/ can be adjusted and fixed. 16. Vertical band saw according to claim 5, characterized by the fact that the working wheel support /6/ can move in the cutting direction /24/ along the horizontal guide /31, 33 - 35, 83, 83'/ which revolves around the vertical pivot axis / 29/ can be rotated and fixed. 17. Vertical band saw according to claim 5, indicated by the fact that the carrier /6/ of the working wheel can be rotated in the cutting direction around the transversely to the cutting direction /24/ and the horizontally placed pivot axis /66, 71/ which can be pivoted around the pivot axis /29/ and fixate. 18. Vertical band saw according to claim 16 or 17, characterized in that the horizontal guide, i.e. pivot axis, is placed on the machine part /2, 80/ on the machine base which can rotate around the vertical pivot axis /29/. 19. Vertical band saw according to claims 8 and 18, characterized in that the rotary table /2/ is provided as a machine part. 20. Vertical band saw according to claim 19, characterized in that the rotary table /2/ starting from the center or to the vertical pivot axis /29/ in the direction of displacement /24/ of the saw band /9/ has a slot /30/ for the passage of the saw band. 21. A vertical band saw according to claim 19, characterized by the fact that the rotary table /2/ starting from its rotating center in the direction towards the working wheel support /6/ has a recess /25/ in the shape of a quarter of a circle for receiving the working wheel support and parts, which are in the plane of the work table connected to it, as well as to free up space for the movement of the work wheel support between its two end positions. 22. Vertical band saw according to claim 18 or 19, characterized by the fact that the machine part or rotary table /2/ is mounted on the machine base so that it can be rotated around its circumference. 23. Vertical band saw according to claim 22, characterized by the fact that the machine part, i.e. the rotary table /2/, has a circular cylindrical extension /32/, which extends downwards, and that this extension has a horizontally surrounding guide groove /37 at its lower end inside and outside . 24. Vertical band saw according to claim 18 or 19, characterized in that the machine part or rotary table /2/ is inserted in the area of the base of the machine base /1/ so that it can be rotated. 25. Vertical band saw according to claim 24, characterized by the fact that the machine part, i.e. the rotary table /2/ is connected to the horizontal base plate /40/ via vertical support parts /32'/ and that the base plate is on the machine base via a radial-axial bearings /41/ mounted so that it can be rotated. 26. Vertical band saw according to claim 16, indicated by the fact that the horizontal guide of the working wheel support /6/ consists of a guide rod /31/ which is covered by the corresponding guide part /33/ of the working wheel support, as well as next to the guide / 35/ for securing against tilting or twisting into which the support lever /34/, which comes out of the leading part of the working wheel support, moves with its end. 27. Vertical band saw according to claim 26, characterized in that the guide bar /31/ has a circular cross-section. 28. Vertical band saw according to claim 17, characterized by the fact that the pivot axis /71/ in the direction of cutting the band /9/ of the saw is brought so that it can be adjusted horizontally. 29. Vertical band saw according to claim 28, indicated by the fact that the adjustment of the pivot axis /71/ can be performed using at least one adjusting spindle /75, 76/, which is mounted on the rotating part of the machine /2/ so that it can be rotated, but axially can't move. 30. Vertical band saw according to claim 16 or 17, characterized in that the moving parts are hinged on one side on the machine part /2, 80/ and on the other side on the working wheel support /6/. 31. Vertical band saw according to claim 30, characterized in that the moving parts are a hydraulic cylinder-piston unit /36, 67, 77, 84/ or an adjusting shaft. 32. Vertical band saw according to claim 16, indicated by the fact that at least one limiter /42/ is placed parallel to the horizontal guide on the machine part /2/ to limit the movement and, in the given case, the movement of the support /6/ of the working wheel. 33. Vertical band saw according to claim 32, characterized by the fact that the stop /42/ can be adjusted using the adjusting shaft /60/ which is rotatably mounted on the machine part /2/ and that the stop noses /62/ which are at least indirectly involved with the stop fixedly connected to the working wheel support /6/, leading part /33/. 34. Vertical band saw according to claim 16, characterized by the fact that the support of the working wheel /6/ in relation to its horizontal guide can be rotated around the axis /44/, which is placed horizontally and transversely to the cutting plane /11/, and in relation to the pivoting position can be fixed. 35. Vertical band saw according to claim 34, characterized in that the swivel axis /44/ of the working wheel support /6/ is placed in the middle area between both vertical arms of the saw band /9/. 36. Vertical band saw according to claim 34, characterized in that the support of the working wheel /6/ is articulated to the guide part /33/, which participates with the longitudinal guide, so that it can be rotated 37. or rotate, and it can be fixed in relation to the pivoting or rotating position. 38. Vertical band saw according to claim 36, characterized by the fact that an adjusting mechanism /45/ is provided for adjusting and fixing the movement of the working wheel support /6/, which is placed between the working wheel support and the guide part /33/. 39. Vertical band saw according to claim 37, characterized in that the adjusting mechanism is an adjusting spindle /47/. 40. Vertical band saw according to claim 1, indicated by the fact that a control lever /49/ is placed on the machine base /1/, which protrudes into the area of movement of the edge or the surface of the working wheel support /6/, in order to limit the movement of the working wheel support and that the control lever can be adjusted in terms of the displacement of the working wheel support, which is determined by the cross-section of the material. 41. Vertical band saw according to claim 39, indicated by the fact that the control lever is placed under the reception /2/ for the material /3/ for cutting in the machine base /1/ so that it is in cooperation with the front edge or the surface of the support of the working wheel /6 /. 42. Vertical band saw according to claim 5, indicated by the fact that the support of the working wheel can be blocked in the forward position of displacement in relation to the cutting direction /24/.