FI97014B - Device on a saw blade - Google Patents

Description

5 97014

Saw blade machine Anordning vid sägsvärd

TECHNICAL FIELD OF THE INVENTION The present invention relates generally to saw blades for sawing tree trunks or logs, and in particular to saw blades included in such so-called saw blades. gripping or holding sawing devices comprising, in addition to a saw blade, a gripping device for gripping the tree trunk, a feeder for longitudinal feeding of the tree trunk relative to the frame included in the sawing device, and means for pruning the tree trunk during said length feeding. 15

State of the art

Color marking of logs has been used in mechanical forestry for a long time. Both actuators (machines for working already felled trees) and sawing machines (machines for both felling and working trees) have also long been equipped with color marking devices. These machines are so-called. the type of double gripping, i.e. the gripping device or the combined sawing and gripping device lifts the trees to a special machining unit, which is usually installed. relatively high, whereby the machined log or piece of log is allowed to fall down after some machining. Known color marking devices 25 for such logs comprise spray nozzles mounted on the body of the machining unit so that paint can be sprayed onto the end of a single log poured by the machining unit. This can be done because said machines are quite large in size so that there is plenty to offer: a protected space for the installation of a color marking device.

30 In recent years, the so-called grip saws or grip saws comprising a gripper mounted on a crane jib supported by a vehicle have become increasingly common in forestry. Such gripping sawing devices comprise all the necessary functions, i.e. gripping, sawing and pruning functions in the same tool. Such grip-leveling devices cannot be fitted with a color marking device on the tool body in the same way as with the above-mentioned machines.

5 Lvhvt explanation of the idea of the invention The object of the present invention is to provide a color marking of the ends of logs or tree trunks, which takes place with a saw blade and in particular the so-called in connection with the sawing of a tree trunk with the saw blades included in the sawing device. These and other objects are achieved according to the invention by providing at least one side of the saw blade with two or more spaced apart nozzles or holes communicating with the at least one toner container through channels within the saw blade and opening the channels individually to optionally spray toner from each from the nozzle at the same time as the saw blade passes through the wood frame or log, wherein the end surfaces of the sawn frame or support parts can be marked with different combinations of dye markings from a selection of different body or support parts.

Further information on the state of the art 20 SE patent application 7604765-6 is previously known per se to provide a saw blade with holes for draining liquid. In this case, however, the saw blade is intended for clearing cuttings, scrub or young forest and the liquid to be discharged consists of a poisoning liquid intended to kill the stump remaining after the clearing operation, the different holes in the saw blade communicating with 25 common toxin tanks via a single channel. Such a saw blade cannot therefore in practice be used for marking tree trunks, because - although the tank could in principle be used with a dyeing liquid instead of a poisoning liquid - the liquid cannot be sprayed from it through different holes. As a result, logs belonging to different categories of varieties cannot be marked with different, different combinations of markings.

30 3 97014

Lvhvt description of the accompanying drawings In the drawings 5 Figure 1 is a side view of a forest machine equipped with a sawing device when felling wood,

Fig. 2 is a side view of a single grip saw in the wood felling position; Fig. 3 is a side view of a single grip saw in the woodworking position;

Fig. 4 is a simplified side view of the gripping arms and saw blades of the gripping saw device in the home or rest position; Fig. 5 is a corresponding side view showing the saw blade of Fig. 4 when sawing a tree trunk and marking color simultaneously with lines and valves from schematically shown storage tanks;

Figure 6 is the same side view showing the saw blade after final sawing of the tree trunk 20 and color marking.

• Detailed description of an embodiment of the present invention

Figure 1 shows a conventional forest machine 1 equipped with a crane 2, at the end of which 25 a gripping sawing device 3 is mounted. Figure 2 shows a corresponding sawing device in the felling position of wood 4 and Figure 3 shows the device in the woodworking position. The sawing device is:. fixed via a rotor 5 to the crane tip and comprises mainly a frame 6 and a rotatable machining unit 7. The machining unit has four paired gripping arms 8, a feed device 30 in the form of a drive belt or drive wheel 9 and a sawing device 10 with a rotatable saw blade according to Figures 4-6 11, around the circumference of which the saw chain can be rotated at a high speed.

4 97014

The gripping arms have two functions. It first holds the frame, partly in the felling position shown in Figure 2, with the saw blade turning horizontally and sawing across the wood, partly in the position shown in Figure 3, where the machining unit has turned relative to the frame and placed the wood on the ground. In addition, the gripping arms prune the body when the feeder 5 feeds it through the device. The gripping stems therefore have sharp blade-shaped longitudinal edges that prune the branches. Once the desired length of the frame has been entered, the feed is cut off and the saw blade saws the pruned and finished tree trunk so that the sawing chain is started and the blade is turned down from the inactive starting position as shown in Figure 4. The pre-sawn logs fall down to form a stack 12 and remain 10 waiting to be transported out of the forest.

Figures 4-6 show simplified side views of the device on which the invention is clearly based. In this connection, the saw blade is shown in Fig. 4 in the inactive starting position, in Fig. 5 during the sawing of the tree trunk and after sawing in Fig. 6. In the figures, the numbers 8 'and 8 "refer to two gripping arms which each engage in the direction of the body 4. The dashed lines refer to a channel 13', 13" according to the invention included in two saw blades and terminating in holes or nozzles 14 ', 14 "in the side surfaces of the saw blade. 5, the channels are connected to lines 15 ', 15 "outside the blade, which connect the channels to valves 16', 16" and 20 to storage tanks 17 ', 17 ". The storage tanks are suitably filled with a liquid paint which, by means of a hydraulic pressure (not shown) with the valves in the open position, flows through lines 15 ', 15 "and channels 13', 13" and sprays through nozzles 14 ', 14 ". The saw blade is shown in Figure 4. in its inactive starting position, where the body can be fed longitudinally through the machine. After the body has been fed forward a suitable distance, the feed is cut off and sawing begins so that the saw chain rotates and the saw blade begins to turn down as shown in Figure 5. Valves 16 ', 16 ": can be opened, for example by means of adjustable limit switches, in a predetermined suitable position on the saw blade, whereby color flows from the tanks and sprays through the nozzles at least one of the end faces 18 thus formed. The timber varieties can be marked in this way to facilitate subsequent handling of the 5 97014 sorts, in which case it is usually useful to mark only the other end surface with color, namely the end surface of the pre-pruned and sawn log. It is also conceivable that the color marking of the logs is carried out only in order to avoid theft when the timber has been stored for some time waiting to be transported forward to the industry. In this case, color marking can be performed on both formed end faces. With the equipped device shown in this connection, in which the saw blade has two different color channels, it is possible to obtain different markings for different varieties. Thus, if both tanks are filled with different colors, the different varieties may be marked with a different color or with both colors. Logs that are not completely marked -10 can also form a variety.

The invention can be modified in many different ways within the scope of the following claims. The number of channels and the position of the nozzles can also be varied. It is also possible to omit the valves 16 ', 16 ", for example, so that the color pumping starts 15 at the same time as the sawing chain starts. Although the embodiment of the invention shown is mounted on a sawing machine, it is of course entirely possible to use the invention in all available machines. Although it is advisable to use different toners in the case of two or more 20 toner containers, it is conceivable to use the same color, in which case different marking combinations can only be achieved by suitably activating one or more valves. consider using a single toner container with two or more lines connected and appropriate shut-off valves. the substance need necessarily be in the form of a liquid, but may also be in the form of a powder, paste or the like.

Claims (4)

97014 Device for sawing wood logs or logs on a saw blade, characterized in that at least one side of the saw blade (11) is led by two or more spaced apart nozzles or holes (14 ', 14 ") which are channels (13') inside the saw blade. 13 ") in connection with at least one toner container (17 ', 17") and that the channels can be opened one at a time so that toner can optionally be sprayed from each nozzle (14', 14 ") at the same time as the saw blade saws through a tree trunk or log. from the selection of support parts, the end faces of the sawn body-10 or support parts can be marked with different combinations of dye markings. Device according to Claim 1, characterized in that the different channels (13 ', 13 ") are connected to separate toner containers (17', 17") provided with different dyes. Device according to claim 1 or 2, characterized in that the channels (13 ', 13 ") in the saw blade are connected to said containers (17', 17") via lines (15 ', 15 ") which include separately openable valves ( 16 ', 16 ") to adjust the toner supply to the individual spray nozzles. Device according to one of the preceding claims, characterized in that the saw blade is included in a gripping sawing device known per se, which further comprises a gripping device (8) for gripping the tree trunk, a feeding device (9) for feeding 25 il 970U