FI94743B - Arrangement for traverse feeding of elongate pieces - Google Patents

Description

l 94743

Device for cross-feeding elongate pieces

The invention relates to a device for transverse feeding of elongate bodies, which device comprises a fixed frame structure, a first movable part and a second movable part formed substantially similarly stepped, transversely arranged bearing surfaces in the transverse direction and a drive device adapted to reciprocate moving parts reciprocally with fixed with respect to which the reciprocating movement of the moving parts is adapted to move the elongate bodies periodically from one step to another.

Such devices are used quite a lot today in various fields of technology. An example of the technical fields in which such devices are used is the wood processing industry, where these devices are used, for example, for the individual dosing of logs. The dosing movement is transverse to the longitudinal direction of the logs or other similar pieces.

20 There are many types of devices described above. An example of a device known in the art is the device described in FI patent publication 78882. The disadvantage of this known device is the unfavorable acceleration and deceleration properties of its moving part, whereby

The operation of 25 devices is not always optimal.

The object of the invention is to provide a device by means of which the drawbacks of the prior art can be eliminated. This is achieved by means of a device according to the invention, characterized in that the moving parts are connected to each other by means of a crank mechanism adapted to change the rotational movement of the drive so that moving parts adjacent in the transverse direction of the device always move in opposite directions.

The main advantage of the invention is that the movement of the pieces is controlled even at high speeds. Em.

2,94743 is due to the advantageous acceleration and deceleration properties of the device. The dosing capacity of the device is also made large because the movable pieces are continuously moved forward and because the transfer movement is controlled even at high movement speeds, as stated above.

The invention will now be explained in more detail by means of a preferred embodiment described in the accompanying drawing, in which Fig. 1 is a plan view of the device according to the invention in principle, Fig. 2 is a sectional view according to arrows II-II of Fig. 1 in the front position; the second movable part is in the rearmost position and Fig. 3 is a sectional view according to arrows II-II in Fig. 1 in a situation where both movable parts are aligned.

The device according to the invention comprises a fixed frame structure 3, a first movable part 1 and a second movable part 20, which are adapted to form stepped surfaces for the fed bodies 9. Attached to the fixed frame structure 3 is a drive device, first moving part 1 support wheels 5 and a drive mechanism comprising a crank mechanism 6. Alternatively, a rail may be attached to the fixed frame structure 3 25 if the castors are attached to the moving part. The drive device 4 can be any suitable motor, for example an electric motor, a hydraulic motor, etc.

The movable part 1 is supported by a fixed frame structure 30 by means of support wheels 5, as stated above.

·. The movable part 2, in turn, is supported on the part 1 by its support wheels 7 and rails attached to the part 1. The movable part 2 is moved by a similar crank mechanism as the part 1. The crank mechanisms are clearly shown in Fig. 1.

35 The upper surface of the moving parts 1, 2 forms a bearing surface • 3 94743 for the pieces to be dispensed 9. The bearing surface profile is stepped as stated above. The bearing surfaces of both moving parts are substantially equal to each other and the bearing surface of each moving part consists of a few 5 bearing surfaces which are in an interleaved position, i.e. the partial bearing surfaces are arranged alternately in the transverse direction of the device.

The shape of the profile of the bearing surfaces is essentially the same in both moving parts 1, 2. The side of the step rising in the transport direction is almost as long as the actuator and also parallel to the actuator. The upper surface of the step profile is cover plates 8 shaped according to the profile, which prevent the pieces from falling in, but allow the debris to fall out.

An essential aspect of the invention is that the movable parts 1, 2 are connected to each other by means of a crank mechanism 6, which is adapted to change the rotational movement of the drive device 4 so that the movable parts 1, 2 always move in opposite directions to each other. The cranks of the crank mechanism 6 moving the moving parts 1, 2 20 are adapted to be in 180 ° phase shift. The dosing-direction movement of the steps of the moving parts can be transmitted by means of the crank mechanism 6, i.e. the rotational movement of the drive 4 is converted into a reciprocating movement by means of the crank mechanism 6. The crank mechanism 25 may comprise, for example, crankshafts and connecting rods as shown in the figures. The structure can also be implemented with a single crankshaft. The crank mechanisms connected to the different parts 1, 2 are in 180 ° phase shift, whereby the moving parts 1, 2 always move in opposite directions. Em. the phase shift 30 is clearly shown in Figure 1.

·. The device according to the invention operates in principle in the following manner. In the initial situation, the cranks of the crank mechanism 6 are parallel to the trajectory and the movable part 1 is in its extreme front position and the movable part 2 is in its extreme rear position. In this situation, the stepped bearing surface of the part 1 is above the corresponding bearing surface of the part 2. Part 1 is also one step further than Part 2.

The front descending portion of the bearing surface of the part 1 extends to the discharge head ramp and the last descending portion of the bearing surface of the part 2 is below the loading head ramp, forming a pocket for the pieces 9 entering the dispenser. This situation is shown in Figure 2.

As the drive 4 rotates the crankshaft, part 1 moves backwards and part 2 moves forward. In this case, the side descending the step of the support surface 10 of the part 2 protrudes behind the support surface of the backward-moving part and pushes the aligned pieces 9 forward on the support surface of the part 1. The movement of each part is about half the length of the part of the bearing surface parallel to the trajectory in each step. Em. due to this fact and the previously mentioned phase shift of the cranks of the crank mechanism, the steps of the steps of the parts 1, 2 are aligned when the crankshaft rotates 180 °. This step is illustrated in Figure 3.

Upon entering the stage according to Fig. 3, the pushing sides of the movable part 2 2 reach the rearwardly moving step cam of the movable part 1, whereby the pieces 9 fall from the above soot to the bearing surface of the part 2 step further ahead and on the rising side At this point, the bearing surfaces 25 of the part 2 are above the bearing surfaces of the part 1.

As the crankshaft continues to rotate from the situation of Figure 3 to the situation of Figure 2, the descending sides of the bearing surface 1 in turn push the pieces 9 forward on the bearing surfaces of the part 2 in a manner similar to that previously shown starting from the initial situation. In addition, loading access ·. the piece 9 in the pocket formed possibly by the ramp and the bearing surface of the step 2 prevents the ramp from moving backwards and and falls to the bearing surface of the step 1 when entering the step according to Fig. 2.

The body 9 in the discharge end, in turn, slides on the rising side of the ramp, pushed by the bearing surface of the step 1 5 94743, until the when the step 9 enters the step according to Fig. 2, it exits the descending side of the ramp to the next conveyor.

By means of the above arrangement, the rotary movement of the actuators can be converted into a reciprocating movement in a simple manner and at the same time a device is provided in which the movement of the bodies is completely controlled even at high speeds, whereby the dosing capacity is also considerably large.

The application example presented above is in no way intended to limit the invention, but the invention can be modified completely freely within the scope of the claims. Thus, it is clear that the device 15 according to the invention or its details do not necessarily have to be exactly as shown in the figures, but other solutions are possible. Although the figure shows an application which also raises the pieces during dosing, it is clear that this is not the only possibility. The device can also be designed in such a way that it does not lift the pieces, but only moves them horizontally. The device according to the invention is also in no way limited exclusively to the handling of logs, but the device can also be used for the handling of other elongate bodies.

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Claims (2)

Device for cross-feeding elongated pieces, comprising a solid body structure 5 (3), a first movable part (1) and a second movable part (2), which are formed in substantially equal, stair-lined, angularly arranged support surfaces in the device transversely arranged. and a drive means (4) arranged to move the movable parts (1, 2) back and forth in relation to the fixed body structure (3) and to each other, the movement of the movable parts (1, 2) being arranged to reciprocate. periodically moving elongated pieces (9) from one step to another, characterized in that the movable parts (1, 2) are coupled to a crank mechanism (6) adapted to change the rotational movement of the drive (4) so that they in the transverse direction of the device adjacent to each other the movable parts (1, 2) move in opposite directions. 2. Device according to claim 1, characterized in that the cranks in the crank mechanism (6) which move the moving parts (1, 2) are arranged in a 180 ° phase shift. »