RU2143338C1 - Device for sawing of logs into lumbers - Google Patents

Abstract

FIELD: devices for length cutting of logs into lumbers in the conditions of small private enterprises. SUBSTANCE: device comprises motor body 3 connected to which is guide bar 30 for saw chain 17. Two hollow guide members 1,2 for a movable platform with rollers are attached with the lower part to the motor body perpendicularly to the saw bar. The peripheral surfaces of the upper parts of the guide members are interconnected by rigid hollow tie 4. Ring 6 is welded to tie 4 through additional hollow member 5. The upper part of screw 7 with a trapezoidal thread of the screw-type positioning and fixing of the platform on the guide members is installed in ring 6 for rotation about the longitudinal axis. Inserts 2 are press-fitted from above in the guide members and are rigidly connected to them by welding. EFFECT: enhanced quality of obtained lumbers due to better device controllability in the process of sawing. 10 cl, 10 dwg

Description

 The invention relates to a device for the longitudinal sawing of logs into lumber mainly in small private enterprises.

 A device is known for longitudinal sawing of logs into lumber, containing a motor housing, a cutting mechanism, a movable platform, guiding elements for a movable platform, rollers mounted on a movable platform, a mechanism for moving and fixing the movable platform on the guide elements, handles for carrying and controlling the device. Optional equipment is a longitudinal, even beam fastened with nails on the surface of the log, along which a device for sawing logs rolls during the first cut (see US Pat. No. 4,841,639, class B 27 B 15/02, 1989).

 This device, due to the peculiarities of the location of the rollers on a movable platform, does not allow lumber with a flat surface, especially at the beginning of sawing when cutting the cutting body into the end of the log and at the end of cutting when the cutting body of the device leaves the log, since it is difficult for the operator to maintain a smooth cut in sawing process. The device has a large mass, the location of the control knobs in space provides poor controllability of the device during sawing and leads to a decrease in the surface quality of the resulting lumber.

 A device is also known for longitudinal sawing of logs into lumber, comprising a motor case, a saw bar with a saw chain, a movable platform, perpendicular to the saw bar and parallel to each other, two guide elements for the movable platform, rollers mounted on the movable platform, a mechanism for moving and fixing the movable platforms on guiding elements, handles for carrying and controlling the device. When sawing a log, additional equipment is also used - a longitudinal even beam fixed with nails on the surface of the log, along which a device for sawing logs rolls during the first cut (see application WO 92/17324 MKI B 27 B 17/00, 1992) .

 This device also does not allow to obtain high-quality smooth lumber, because due to the peculiarities of the location of the rollers on the movable platform and the control knobs in space it has poor controllability, which does not allow to obtain an even cut along the entire length of the log.

 The technical task of the claimed device is to improve the quality of lumber due to better controllability of the device during the sawing process.

 The specified technical problem is solved in that the two guide elements are hollow and fixed with their lower part on the motor housing, and the side surfaces of the upper parts of the guide elements are interconnected using a rigid hollow connection, to which a ring is welded through an additional hollow element, with which rotation around the longitudinal axis, the upper part of the mechanism for moving and fixing the platform on the guide elements is installed, which is made in the form of having a trapezoidal screw and nut thread, with inserts pressed into the guide elements from above and rigidly connected to them by welding.

 The movable platform contains two slider parallel to each other for movement along the guiding elements, rigidly connected by welding with one end of two parallel hollow cross-beams, also rigidly connected by welding with two flat cheeks parallel to each other but perpendicular to the cross-pieces, and the other ends of the cross-pieces are pressed there are two inserts in them, which are connected to them by welding, and on the side of the sliders with the cross members of the platform, a bracket is connected by welding to which the nut is fixed with a trapezoidal thread of the mechanism for moving and fixing the platform on the guide elements.

 The movable platform contains at least four rollers parallel to each other, and at least two rollers are fixed to the platform from the side of the working branch of the saw chain and at least two rollers are fixed to the platform from the side of the inoperative branch of the saw chain.

 Rollers are made of metal or plastic tubes.

 The rollers are mounted on a movable platform by means of thrust bearings.

 In one embodiment of the device, the support rolling bearings are provided with housings with covers, the housings having grooves for mounting the cheeks, and the lower part of each bearing housing has the appearance of a flat surface, the flat cheeks of the movable platform having U-shaped sockets for mounting the roller bearing housings and fixing them to the cheeks with screws.

 In another embodiment of the device, the rollers are hollow and have axes, and the thrust bearings are mounted on the axes inside the rollers and have spacers located between them, and the thrust bearings have rings that are installed on both sides of the cheeks, the rings are fixed with nuts screwed onto the threaded the ends of the axles on the outside of the cheeks, the flat cheeks of the movable platform having holes for mounting the axes of the rollers.

 The rolling plane of the rollers is parallel to the tire with the saw chain, and the longitudinal axes of the rollers are perpendicular to the direction of movement of the device during sawing.

 The device is equipped with two U-shaped hollow handles, with the first U-shaped hollow handle installed at one end on the insert of one guide element, and the second end on the insert of the other guide element and secured to them by pins, and the second U-shaped hollow handle is installed with one end to insert one cross member, and the other end to insert another cross member and secured to them by means of additional pins.

 The proposed set of features can improve the quality of the resulting pilomatals due to better controllability of the device during the sawing process.

 Technical solutions that have similar characteristics for obtaining the same properties (ensuring the same technical effect) were not identified, which allows us to conclude that the claimed technical solution meets the criteria of the invention "significant differences".

The invention is illustrated by drawings, in which:
in FIG. 1 is a front view of the device during the first longitudinal cut when moving on a flat surface of the guide beam, which is mounted on top along the log and fastened with nails on its surface;
in FIG. 2 is a top view of the device;
in FIG. 3 is a side view of the device;
in FIG. 4 is a side view of the device when cutting the saw chain of the device into a log at the beginning of sawing;
in FIG. 5 is a side view of the device when the saw chain of the device leaves the log at the end of sawing;
in FIG. 6 is a front view of the device during the execution of the second and subsequent cuts when moving on a flat surface of the log;
in FIG. 7 shows the cheek of a mobile platform of a device with two rollers and bearing housings removed;
in FIG. 8 shows an embodiment of the device in which the roller bearings are mounted in housings having grooves in which the cheeks enter;
in FIG. 9 shows an embodiment of the device in which thrust bearings with spacer sleeves between them are mounted on axes inside the rollers;
in FIG. 10 shows the device in operation when controlling a single operator.

 The arrows in the drawings show the direction of movement of the device when sawing a log.

 A device for sawing logs into lumber contains a motor case, a saw bar with a saw chain, a movable platform, two guide elements for the movable platform located perpendicular to the saw bar and parallel to each other, rollers mounted on the movable platform, a mechanism for moving and fixing the movable platform on the guide elements , handles for carrying and controlling the device.

 Two guide elements 1 and 2 (Fig. 1, 3-6) for the movable platform are hollow and fixed with their lower part on the motor housing 3 (Fig. 1, 2, 6), and the side surfaces of the upper parts of the guide elements 1 and 2 are connected with each other by means of a rigid hollow connection 4 (Fig. 1, 3-6), to which, through an additional hollow element 5 (Fig. 1, 2, 6), a ring 6 is welded (Fig. 1, 3-6), in which the possibility of rotation around the longitudinal axis is the upper part of the mechanism for moving and fixing the platform on the guide elements 1 and 2, which you it is filled in the form of a screw 7 having a trapezoidal thread (Fig. 1, 3-6) and a nut 8 (Fig. 1-6), and the inserts 9 (Fig. 1, 3) are pressed into the guide elements 1 and 2 from above and rigidly with them connected by welding.

 The movable platform contains two parallel to each other slide 10 (Fig. 1, 2, 6) for movement along the guide elements 1 and 2, rigidly connected by welding with one end of two parallel to each other hollow cross-beams 11 and 12 (Fig. 1, 2, 6 ), also rigidly connected by welding with two flat cheeks 13 (Figs. 1-7, 9) parallel to each other, but perpendicular to the crossbars 11 and 12, and the other ends of the crossbars have two inserts 14 pressed into them (Figs. 1, 2) which are connected with them by welding, moreover, from the side of the sliders 10 with the cross members 11 and 12 of the platform the bracket 15 is connected by welding (Fig. 1-6), on which the nut 8 is fixed with a trapezoidal thread of the mechanism for moving and fixing the platform on the guide elements 1 and 2.

 The movable platform contains at least four parallel to each other rollers 16 (Fig. 1, 2, 6, 8, 9), and at least two rollers 16 are mounted on the platform from the side of the working branch of the saw chain 17 (Fig. 1-6) and no less than two rollers 16 are fixed on the platform from the side of the inoperative branch of the saw chain 17.

 The rollers 16 are made of metal or plastic tubes.

 The rollers by means of thrust bearings 18 (Fig. 1, 8, 9) are mounted on a movable platform.

 In one embodiment of the device, the thrust bearings 18 are provided with housings 19 (Figs. 1, 8) with covers 20 (Figs. 1, 3-5, 7), the housings having grooves 21 (Figs. 1, 8) for mounting the cheeks 13 and the lower part of each housing 19 of the bearing 18 has the form of a flat surface 22 (Fig. 1, 7), and the flat cheeks 13 of the movable platform have U-shaped sockets 23 (Fig. 7) for mounting the housings 19 of the bearings 18 of the rollers 16 and fastening them to the cheeks 13 by means of screws 24 (Fig. 1, 3-5, 7).

 In another embodiment of the device, the rollers 16 are hollow and have axes 25 (Fig. 9), and the thrust bearings 18 are mounted on the axes 25 inside the rollers 16 and have spacers 26 located between them (Fig. 9), and the thrust bearings 18 have rings 27 and 28 (Fig. 9), which are installed on both sides of the cheeks 13, rings 27 and 28 are fixed with nuts 29 (Fig. 9), screwed onto the threaded ends of the axes 25 from the outside of the cheeks 13, and the flat cheeks 13 of the movable platform have holes for mounting axles 25 of the rollers 16.

 The rolling plane of the rollers 16 is parallel to the tire 30 (Fig. 1, 2, 6) with the saw chain 17, and the longitudinal axes of the rollers 16 are perpendicular to the direction of movement of the device during sawing.

 The device is equipped with two U-shaped hollow handles 31 and 32 (Fig. 1-6, 10), and the first U-shaped hollow handle 31 is installed at one end to the insert 9 of the guide element 1, and the second end to the insert 9 of the guide element 2 and mounted on them by means of pins 33 (Figs. 1, 3), and the second U-shaped hollow handle 32 is mounted at one end to the insert 14 of the cross member 11, and the second end to the insert 14 of the cross member 12 and fixed to them by means of additional pins 34 (FIG. . 12).

 Additional equipment is a longitudinal, even guide rail 35 (Fig. 1-5), fixed with nails 36 (Fig. 1) along the surface of the log 37 (Fig. 1-6), along which the device for sawing logs rolls during the first cut.

 The device operates as follows.

 Preliminarily, on the surface along the log 37 with nails 36, a longitudinal, even guide rail 35 is fixed with a length not less than the length of the log.

 By rotating the screw 7, the movable platform is mounted on the guide elements 1 and 2 so that the distance between the saw chain 17 and the bottom of the rollers 16 is not less than the length of the nails 36 so that subsequent sawing does not damage the saw chain 17 (Fig. 1).

 Next, the device is installed on the sawn log 37 so that at least two front rollers 16 from the side of the working branch of the saw chain 17 rest on the surface of the guide bar 35 (Fig. 4). In this case, the tire 30 with the saw chain 17 is installed strictly parallel to the surface of the beam 35, since the device has at least two support points on the surface of the beam 35.

 After that, the process of sawing the log 37 begins. During sawing, the tire 30 with the saw chain 17 moves parallel to the flat surface of the guide bar 35, so the cut is also smooth, parallel to the surface of the bar 35 (Fig. 3, 5).

 The exit of the tire 30 with the saw chain 17 from the log 37 also occurs parallel to the surface of the guide bar 35, since in this case the device has at least two support points (at least two rear rollers 16 along the saw blade from the side of the inoperative branch of the saw chain 17) on the surface of the beam 35 (Fig. 5).

 The device has at least two support points when cutting the saw chain 17 into the log 37 and the exit of the saw chain 17 from the log, as well as at least four support points during sawing, it is possible to obtain high-quality lumber with a flat surface, since throughout the entire length of the sawn log 37 the tire 30 with the saw chain 17 is parallel to the surface of the guide bar 35. Thus, the first cut is made and the saw is sawn from the log 37.

 When sawing from the log 37 of the board following the slab, the previously obtained flat surface of the log 37 is used as a guide along which the device rolls on rollers 16 when performing the next cut (Fig. 6).

 By rotating the screw 7, the movable platform is mounted on the guide elements 1 and 2 so that the distance between the saw chain 17 and the bottom of the rollers 16 corresponds to the required thickness of the sawn board. For this, a template can be used that is laid between the saw chain 17 and the rollers 16.

 Sawing logs of 37 small diameter can be done by one operator. In this case, the device is controlled using two handles: a handle 38 on the motor housing 3, a device and a U-shaped handle 31 fixed to the inserts 9 of the guide elements 1 and 2 (Fig. 10).

 Sawing logs of large diameter 37 can be done by two operators. In this case, the second operator applies additional forces to the U-shaped handle 32, mounted on the inserts 14 of the cross members 11 and 12 of the movable platform (Fig. 10).

 The fact that the movable platform contains at least four parallel rollers 16, and at least two rollers 16 are fixed to the platform from the side of the working branch of the saw chain 17 and at least two rollers 16 are fixed to the platform from the side of the broken branch of the saw chain 17 is the optimal condition for ensuring high quality of the resulting lumber.

 The number of rollers 16, less than two mounted on the platform either from the side of the working branch of the saw chain 17, or from the side of the inoperative branch of the saw chain 17 leads to a deterioration in the quality of the resulting lumber (thickness difference in length), since at the beginning of sawing when the saw chain 17 is inserted into the log 37 or at the end of sawing when the saw chain 17 leaves the log 37, the device rests on one roller 16 (has one fulcrum), which means that the tire 30 with the saw chain cannot be strictly parallel to the guide surface of the longitudinal beam 35, we fix on the surface of the log 37 when making the first cut, or the surface of the log 37 when making subsequent cuts.

 The presence of hollow elements: two hollow guide elements 1 and 2 for a movable platform, a rigid hollow connection 4 connecting the side surfaces of the upper parts of the guide elements 1 and 2, an additional hollow element 5, to which the ring 6 for screw 7 of the screw 7 of the screw mechanism for moving and fixing is rigidly welded platforms on the guiding elements 1 and 2 of two hollow cross-beams 11 and 12 of the movable platform, two hollow U-shaped handles 31 and 32 for carrying and controlling the device, allows to reduce the weight of the device, ul to increase its controllability and thus improve the quality of the resulting lumber.

 The presence of two hollow U-shaped handles 31 and 32: one 31, installed on the insert 9 of the guide elements 1 and 2, and the other 32, mounted on the insert 14 of the cross members 11 and 12, allows you to rationally apply the efforts of one operator to the device when sawing logs of small diameter or the efforts of two operators when sawing logs of large diameter, thus improving the controllability of the device and improving the quality of the resulting lumber.

Claims (10)

 1. A device for sawing logs into lumber, comprising a motor case, a saw bar with a saw chain, a movable platform, two guide elements for the movable platform, perpendicular to the saw bar and parallel to each other, rollers mounted on the movable platform, a mechanism for moving and fixing the movable platform on the guiding elements, handles for carrying and controlling the device, characterized in that the two guiding elements are hollow and fixed with their lower part on the motor the case, and the lateral surfaces of the upper parts of the guide elements are interconnected by means of a rigid hollow connection, to which a ring is welded through an additional hollow element, in which the upper part of the platform moving and fixing mechanism on the guide elements is mounted around the longitudinal axis, which is made in in the form of a screw and nut having a trapezoidal thread, with inserts pressed into the guide elements from above and rigidly connected to them by welding.  2. The device according to claim 1, characterized in that the movable platform comprises two sliders parallel to each other for movement along the guide elements rigidly connected by welding with one ends of two hollow cross-beams parallel to each other, also rigidly connected by welding with two flat cheeks parallel to each other to a friend, but perpendicular to the cross-pieces, and the other ends of the cross-pieces have two inserts pressed into them, which are connected to them by welding, and on the side of the sliders, the platform cross-pieces are connected by means of RCTs bracket, which is fixed with trapezoidal thread nut and locking mechanism moving platform guide elements.  3. The device according to claim 1 or 2, characterized in that the movable platform contains at least four parallel to each other rollers, with at least two rollers mounted on the platform from the side of the working branch of the saw chain and at least two rollers mounted on the platform with side of the inoperative branch of the saw chain.  4. The device according to one of claims 1 to 3, characterized in that the rollers are made of metal tubes.  5. The device according to one of claims 1 to 3, characterized in that the rollers are made of plastic tubes.  6. The device according to one of claims 1 to 5, characterized in that the rollers are mounted on a movable platform by means of thrust bearings.  7. The device according to one of paragraphs.2 and 6, characterized in that the bearings are provided with housings with covers, and the housings have grooves for installing the cheeks, and the lower part of each bearing housing has a flat surface, and the flat cheeks of the movable platform have U -shaped sockets for installation of roller bearing housings in them and their fastening to the cheeks by means of screws.  8. The device according to claim 2 or 6, characterized in that the rollers are hollow and have axes, and the thrust bearings are mounted on the axes inside the rollers and have spacers located between them, and the thrust bearings have rings that are mounted on both sides cheeks, rings are fixed with nuts, screwed onto the threaded ends of the axles from the outside of the cheeks, and the flat cheeks of the movable platform have holes for mounting the axes of the rollers.  9. The device according to one of claims 1 to 8, characterized in that the rolling plane of the rollers is parallel to the tire with the saw chain, and the longitudinal axes of the rollers are perpendicular to the direction of movement of the device when sawing.  10. The device according to one of paragraphs.1 to 9, characterized in that it is equipped with two U-shaped hollow handles, the first U-shaped hollow handle installed at one end to insert one guide element, and the second end to insert another guide element and secured to them by means of pins, and the second U-shaped hollow handle is mounted at one end to an insert of one cross member, and the second end to an insert of another cross member and fixed to them by means of additional pins.

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