CH657289A5 - Arrangement for classifying of bar-like elements, especially parkettstaeben. - Google Patents

Description

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PATENT CLAIMS towards the drive axis (27) diverging upwards

1. Arrangement for classifying rod-like elements, hole (30), which can be loaded with a feed path for loading and forms the lower air outlet (7) via a lower air supply line (31), in particular parquet bars, because of the elements transverse to their longitudinal direction , and with the 10th arrangement according to claim 9, characterized by at least one pair of mutually associated holes (28, 30) extending downward and extending with at least one extending pair of holes (28, 30) and with actuators of the upper and lower rotary slide discs (25 and 26, respectively) , for selectively separating out individual elements according to which at uniform angular intervals over the specified specifications, characterized in that the catchment areas of both rotary slide disks are distributed, an actuator assigned to the outlet passage (5) as the 11th arrangement according to claim 1, characterized in that a pneumatic actuator with two air outlets (7,8) io net that the pneumatic actuator song two with play coaxial as well, one of which comprises a lower air outlet (7) from below with a vertical cylindrical hollow cylindrical rotary valve ner vertical component and an upper air outlet (8) of (40,41), of which the outer (40 ), which is arranged at the top essentially vertically against the outlet passage, on both end faces, the inner (41), which steps (5) are aligned, and that the two air outlets (7, are rotatably mounted, however, only on one Face removed

8) only mutually set to opening. locks are that the inner volume of the inner rotary

2. Arrangement according to claim 1, characterized in that the slide, which runs on its open end face through the end face — that the outlet passage (5) in the feed direction obliquely on the side end of the outer rotary valve with axial play. is limited, can be acted upon via an air supply line (43),

3. Arrangement according to claim 1, characterized in that the inner rotary slide valve at least two radial openings (44, 45) at an axial distance from that in a through the central parallel of the feed path (1) 20 contains the angular vertical plane an endless cam chain (4) are offset to one another, and that the outer rotary valve is mounted and at both lateral ends of the outlet passage in the area of the radial openings (44, 45) of the inner rotary member (5) or on both sides of the cam chain (4) one pneumatic slide each has an upper radial and, in the vertical orientation, actuator with a pair of air outlets (7, 8) each, which includes a lower radial / axial opening (46 or 47). 2s of which the lower opening (47) upwards from the rotary

4. Arrangement according to claim 3, characterized in that the slide axis diverges and the lower air outlet (7) that the cam chain (4) is continuously driven. forms while the upper opening (46) via an air line

5. Arrangement according to claim 1, characterized in (48) with the upper air outlet (8) is connected.

that above the feed path (1) has a guide path (6) 12. Arrangement according to claim 1,

is provided. 30 net that the pneumatic actuator two with play coaxially as well

6. Arrangement according to claim 1, characterized in vertically nested hollow cylindrical rotary valve that the pneumatic actuator comprises a fully cylindrical rotary (40, 41), of which the outer (40), which stationary slide (10) with a fixed radial air inlet (11 ) is arranged in, on both end faces, the inner one (41), which comprises an axial recess, of which a radial one is rotatably mounted, on the other hand, only on one end side is the channel (12) to the rotary slide circumference and from there are 35 locks that the inner volume of the inner rotary mouth of a stationary line (13) to the upper air slide, which on its open end face through the front outlet (8) and also a side end in the rotary slide axis of the outer rotary slide with axial play angularly offset channel (14), which is also limited to the lower one, can be acted upon via an air supply line (43), forms air outlet (7), radial / ax ial to the outer area of the inner rotary valve that the axial rotary valve run at an axial distance from the rotary valve end face (15). 40 contains at least two radial openings (44, 45), which are in

7. Arrangement according to claim 6, characterized in that there is a vertical orientation, and that the outer rotation — that the air inlet (11) at the end of a stationary air supply slide in the region of the radial openings (44, 45) of the interior (16) is provided, the end portion in the axial ren rotary valve an upper radial and an angular thereto recess of the rotary valve (10). includes offset lower radial / axial opening (46 or 47),

8. Arrangement according to one of claims 6 and 7, of which the lower opening (47) diverges upward from the rotation, characterized by a plurality of pairs of mutually associated slide axis, and the lower air outlet (7) is radial and radial / axial Channels (12 or 14), which forms, while the upper opening (46) via an air line at regular angular intervals via the rotary valve (48) is connected to the upper air outlet (8).

are distributed around (Figure 6). 13. Arrangement according to one of claims 11 and 12,

9. Arrangement according to claim 1, characterized in that by a plurality of pairs of mutually associated — that the pneumatic actuator has two parallel circular disk-shaped upper and lower openings (44, 45 and 46, 47) on moderate rotary slide valves (25, 26) horizontal disc plane of the inner rotary valve (41), which comprises uniformly, which are distributed by a vertical drive axis (27) connected angular distances over the circumference.

are and of which the upper rotary slide disc (25) 14. Arrangement according to one of claims 11 to 13,

Above and the lower rotary slide disc (26) below 55 are characterized in that the inner rotary slide (41) runs above the feed path (1) of the rod-like elements (2), one end of the outer rotary slide

that the upper rotary valve disc is driven by a shaft (42) passing through an outer converter.

catch area an assigned movement path of the lateral 15th arrangement according to one of claims 8, 10, 13,

End sections of the rod-like elements on the outlet characterized by that the pneumatic actuator by a

passage (5) overlaps and in this outer circumferential plane 60 stepper motor which can be switched in one direction of rotation

richly has a hole (28), which is above an upper air supply.

device (29) can be acted upon and the upper air outlet (8)

forms, and that the lower rotary valve disc

The invention relates to a device for classifying the ordered movement path of the lateral end sections of the rod-like elements, in particular parquet bars, according to the rod-like elements, one over that of the preamble of the claim 1.

Hole (28) of the upper rotary valve disc angularly offset, one according to the preamble of claim 1

The device has become known from DE-AS 1 623 144 and comprises a sorting conveyor provided with drivers, which transports the sawn timber across its longitudinal direction via a feed path. In addition, several parallel flaps extending transversely across the feed path are provided to drop the sawn timber down. The flaps have the task of turning the sawn timber upright into the narrow channels underneath and are swiveled up or down according to the requirements, i.e. opened and closed.

Such mechanical switching devices in the form of flaps have the essential disadvantage that, on the one hand, the speed for sorting or for classifying rod-like elements is too low. In addition, the service life of such devices does not meet the desired high requirements.

A method and a device for sorting stacks of veneer sheets have also become known, for example, from DE-OS 1 431 035. This sorting and stacking device comprises an elongated support structure with a plurality of spaced vertical and horizontal supports which delimit a plurality of receptacles, each of which is assigned a detection device which is aligned with a sorting station. In addition, a vacuum conveyor for transporting a veneer sheet from the sorting station to one of the containers is provided. The ejection device for sorting the veneer sheets downward comprises two shafts which are arranged at a distance from one another and two elongated strips which are connected to one of the shafts via a linkage and which are moved in the vertical direction when a pressure medium motor is actuated and thereby eject the veneer sheet.

However, this known device is extremely complex with a large number of mechanical switching elements. Above all, however, the ejection device is also mechanical, which again limits the sorting speed and the service life of the entire system does not reach the desired values.

In contrast, it is an object of the invention to provide a device for classifying bar-like elements, in particular parquet bars, by means of which the elements to be classified can be separated out at an increased speed and thus an overall increase in the feed rate can be achieved.

The object is achieved according to the features specified in the characterizing part of claim 1. Advantageous embodiments of the invention in terms of the task are specified in the dependent claims.

The arrangement of the transversely directed lower outlet passage for the rod-like elements in connection with the lower air outlet of the pneumatic actuator ensures that the feed path is already released again when the rod-like element has traveled a distance that essentially corresponds to its thickness or material thickness , but not its length, as is the case according to the prior art. If, therefore, the same movement speeds of the rod-like elements to be separated from the feed path are assumed, the object of the present invention releases the feed path in a shortened period of time, which corresponds to a fraction of the time period required for laterally ejecting the parquet rods, approximately to the ratio of material thickness to Length of the rod-like element. As a result, the feed rate of the rod-like elements can be increased many times with the subject of the present invention. It goes without saying that the arrangement according to the invention has several

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Outlet passages can be provided, depending on the selected number of trading classes according to which the rod-like elements are to be classified.

Through the development according to claim 2, a particularly favorable and trouble-free rejection of the rod-like elements to be classified can be achieved, in particular the risk of blocking the outlet passage, for example as a result of material tolerances, being largely avoided.

Through the further development according to claim 3 it is achieved that the rod-like elements fall down when they are discarded in a fairly precise horizontal orientation and remain in a largely orderly orientation, so that a subsequent packaging process is substantially simplified.

Through the development according to claim 4, the service life of the arrangement is increased and the energy required for operation is reduced, since the constant acceleration and deceleration of relatively heavy masses is avoided.

Through the development according to claim 5, tilting of the rod-like elements during feed is reliably avoided, and it is in particular also achieved that an element, when it is located directly above the outlet passage and is acted upon by the lower air outlet or lower air outlets , cannot be thrown upwards.

The further development according to claim 6 creates an actuator specially designed for the arrangement according to the invention, which enables the rod-like elements to be separated from the outlet passage to drop out without any special design effort.

The training according to claim 7 er-35 results in a simple and space-saving structure with low leakage losses.

Due to the development according to claim 8, very short switching times of the pneumatic actuator are achieved, and the construction effort is also reduced insofar as the pneumatic actuator can be driven by a commercially available stepper motor that can be switched in one direction of rotation.

The further development according to claim 9 also provides an actuator designed specifically for the arrangement according to the invention, analogously to that according to claim 6.

The further development according to patent claim 10 achieves advantages in a pneumatic actuator according to patent claim 9 which are analogous to those of the further development according to 50 patent claim 8.

The further development according to patent claim 11 also creates an actuator specially designed for the arrangement according to the invention analogous to those according to patent claims 6 and 9, whereby the further development according to patent claims 12 and 13 provides advantages analogous to those according to patent claims 8 and 10 are achieved.

Through the development according to claim 14, a particularly space-saving construction with low inertial masses or moments of inertia can be achieved in a pneumatic actuator according to one of patent claims 11-13.

Embodiments of the invention are explained below with reference to the drawing. Show it:

65 shows an exemplary embodiment of an arrangement according to the invention in a fragmentary representation and in a vertical median plane section parallel to the feed direction,

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Fig. 2 shows the arrangement of Fig. 1 in plan view, Fig. 3 shows a section along the line III-III of Fig. 2, Fig. 4 shows a first embodiment of a pneumatic actuator to be used in connection with the arrangement of Fig. 1-3 in side view or an axially sectioned representation,

Fig. 5 is a section along the line V-V of Fig. 4; 6 shows a further development of the pneumatic actuator of FIGS. 4 and 5 in a schematic representation that is reduced in comparison,

7 shows a further exemplary embodiment of a pneumatic actuator to be used in connection with the arrangement according to FIGS. 1-3 in a side view and partially broken away representation,

8 shows a further embodiment of a pneumatic actuator to be used in connection with the arrangement according to FIGS. 1-3 in vertical axial section.

The arrangement shown in FIGS. 1-3 comprises a lower feed path 1 for parquet bars 2 to be classified, which are advanced by means of a cam chain 4 provided with cams 3 and continuously driven in the direction of an arrow Pf 1. The feed path 1 has a substantially smaller width than the length of the parquet bars 2 and, as can best be seen in FIG. 2, can be slit in the middle in order to obtain better access for maintenance work. However, this is not absolutely necessary. It is essential, however, that the feed path 1 has at least one transverse, lower downward passage 5 for parquet bars 2 to be separated. The rear edge of the outlet passage 5 in the direction of the arrow Pf 1 is appropriately rounded in order to prevent the parquet bars 2 from tilting. Although only a single outlet passage 5 is shown in the drawing, it is understood that, as a rule, a plurality of outlet passages 5 are arranged one behind the other, depending on the number of required trading classes according to which the parquet strips 2 are to be classified.

Above the feed track 1, a guide track 6 slotted in the feed direction (arrow Pfl) is provided, into which the cam chain 4 extends and whose clear distance from the feed track 1 is only slightly greater than the material thickness of the parquet bars 2. In this way, tilting of the parquet bars 2 during the feed is counteracted, and it is also achieved that a parquet bar 2 located just above the outlet passage 5 cannot be flung upwards when pressurized with compressed air.

At both lateral ends of the outlet passage 5 or on both sides of the cam chain, a pneumatic actuator (each to be explained in more detail below) is arranged, each with a pair of air outlets 7, 8. As can best be seen from FIG. 3, the lower air outlet 7 is arranged outside the falling movement path (indicated by a dashed line LI in FIG. 3) and is oriented obliquely upwards, so that when the lower air outlet 7 is acted upon, the air is open the lower surface of a parquet bar 2 strikes when it is just above the outlet passage 5. In this way, when the lower air outlets 7 are acted upon, a parquet rod 2 is prevented from falling out of the outlet passage 5 if, at the same time, air is not applied to the upper air outlet 8. If, on the other hand, the upper air outlets 8 are acted upon and, in addition, no air escapes from the lower air outlets 7, a parquet rod 2, when it is just above the outlet passage 5, is ejected downward with a relatively high acceleration according to an arrow Pf2. It is essential for the functioning of the arrangement that the two lower air outlets 7, on the one hand, and the two upper air outlets 8, on the other hand, are each only to be alternately set to open.

The pneumatic actuator shown in FIGS. 4 and 5 comprises a fully cylindrical rotary slide valve 10 with an ra-5dial fixed slot-like air inlet 11, from which a radial channel 12 to the rotary slide valve circumference and from there via the mouth of a fixed line 13 to the upper air outlet 8 and further a channel 14 offset angularly in the rotary slide axis, which at the same time forms the non-loose air outlet 7, runs radially / axially to the outer region of a rotary slide face 15.

The radial air inlet 11 is provided at the closed end of an air supply 16, which runs at its bent end section without a special seal in an axial blind bore of the rotary valve 10. The rotary valve 10 is driven via a shaft 17 and, as can best be seen in connection with FIG. 5, can be deflected in an angular range p according to a double arrow Pf2, so that either the duct 14 or lower air outlet 7 or the duct 12 is in alignment with the air inlet 11 at the end of the air supply 16.

6, the same components are provided with the same reference numerals as in FIGS. 4 and 5. A plurality of pairs of radial and radial / axial channels 12 and 14 arranged in relation to one another are provided, only the lower air outlets 7 of the latter channels being visible. The channels 12 and 14 are distributed at equal angular intervals over the circumference of the rotary slide valve, in the present case at angular intervals of 90 c, which corresponds to the angle p of FIG. 5. With such a pneumatic actuator, it is not necessary to move the rotary slide valve 10 back and forth with each changeover operation, as this corresponds to the double arrows Pf2 from FIGS. 4 and 5, but rather it can be done in a single direction of rotation in steps corresponding to the angle p, in the present case 90 °, are switched on, as this corresponds to the arrow Pf3 in FIG. 6. A sufficiently high number of channels 12 and 14 allows very small values for the angle p and thus very high switching speeds to be achieved. In FIG. 40, only four pairs of channels 12, 14 or lower air outlets 7 are illustrated for the sake of a better overview.

The pneumatic actuator shown in FIG. 7 comprises two parallel rotary disk slides 25, 26 which are connected by a vertical drive axis 27 and of which the upper rotary slide disk 25 extends above and the lower rotary slide disk 26 below the conveying plane of the parquet bars 2. The upper rotary slide disk 25 overlaps with an outer circumferential area an assigned movement path of the lateral end sections of the parquet bars 2 at the outlet passage 5 and has a hole 28 in this outer circumferential area, which is to be acted upon via an upper, stationary air supply line 29, the hole 28 forms the upper air outlet 8. The lower 55 rotary slide disk 26 has a smaller diameter than the upper rotary slide disk 25 and is in the outer circumferential area, which does not overlap an associated movement path of the lateral end sections of the parquet strips 2, with an angularly offset relative to the hole 28 of the obeso ren rotary slide disk 25, opposite the Provide drive shaft 27 upward diverging hole 30. The hole 30 is to be acted upon via a lower air supply line 31 and forms the lower air outlet 7.

To alternately act upon the lower air outlet 7 and the upper air outlet 8, the drive axis 27 must be deflected in one or the other direction in an angular range corresponding to the angular displacement p (cf. analogously to FIG. 5) of the air outlets 7, 8 according to a double arrow Pf2.

ken. However, the pneumatic actuator of FIG. 7 can also be developed analogously to FIG. 6 in such a way that several pairs of holes 28, 30, the upper and lower rotary slide disks 25 and 26 are assigned to one another at uniform angular intervals, for example 90 ° as in FIG. 6, are distributed over the circumferential areas of the two rotary slide disks 25, 26. In this case, drive of the drive shaft 27 is again possible by means of a stepper motor to be switched in one direction of rotation.

In the pneumatic actuator illustrated in FIG. 8, two hollow cylindrical rotary slide valves 40, 41, which are coaxially and vertically nested one inside the other, are provided, of which the outer rotary slide valve 40, which is fixed in place, the inner rotary slide valve 41, which is rotatably mounted, on both end faces is, however, is only completed on its lower end. The inner rotary valve 41 is to be driven by a drive shaft 42 which runs through the lower end of the outer rotary valve 40. The inner volume of the inner rotary slide valve 41, which is limited on its open end face by the upper end-side closure of the outer rotary slide valve 40 with little axial play, can be supplied via an air supply line 43.

The inner rotary valve 41 contains at least two radial openings 44, 45 at an axial distance, which are offset at an angle to one another (for example, corresponding to the angle p of FIG. 5). The outer rotary slide valve has an upper radial opening 46 in the range of movement of the radial openings 44, 45 of the inner rotary slide valve 41 and a lower radial / axial opening 47 in a vertical orientation, the lower opening 47 diverging upward away from the rotary slide valve axis and the lower one Air outlet 7

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forms. The upper opening 46 is connected to the upper air outlet 8 via an air line 48. The air outlets 7 and 8 are alternately acted upon and shut off in a manner analogous to the previously described exemplary embodiments according to FIGS. 4-7 by driving the drive axle 42 according to a double arrow Pf2.

However, the pneumatic actuator of FIG. 8 can also be developed analogously to FIG. 6 in such a way that the inner rotary slide valve 41 contains a plurality of pairs of upper and lower openings 44, 45 assigned to one another. 8 shows two pairs of openings 44, 45 which are offset from one another by a distance of 180 °. It goes without saying that the angular division can be carried out much more finely, that is to say that a multiplicity of pairs of openings 44, 45 can be provided distributed over the circumference of the rotary slide 41. In this case, the drive axis 42 can be driven by a stepper motor to be switched in one direction of rotation.

It is understood that, on the basis of the exemplary embodiment of the arrangement according to FIGS. 1-3, each outlet passage 5 of the feed path 1 is assigned two pneumatic actuators according to FIGS. 4 and 5 or 6 or 7 or 8 have to be. The pneumatic actuators can optionally be switched manually by an operator, which, however, limits the maximum achievable feed rate and thus the output. Preferably, therefore, the pneumatic actuators are actuated by electronic monitoring elements, which are already the subject of a proposal not belonging to the prior art and enable an exact scanning of the surfaces of the parquet strips 2 according to the desired commercial classes.

C.

3 sheets of drawings