DE3021563A1 - Stacker appts. for profiled sectioned steel - has hooks and magnets for removing steel profiles from conveyor - Google Patents

Abstract

The stacker has hooks and magnets (1) for picking up the profiles and located beneath the plane in which the profiles are being conveyed. The hooks engage the profiles from below. Mechanical sensors (3) or electronic sensors are located along the direction of conveyance and scan the space in front of the hooks along a length greater than the max. admissible distance between two adjacent profile ends. The mechanical sensors have skids (3) forced upwards by springs (6) or counterweights and projecting in the upper position over the plane of conveyance by a length greater than the max. admissible distance between adjacent profiles. The hooks or magnets are moved up and down with the skids.

Description

Rod feeder for profile steel stacking device

The subject of the invention is a rod feed device, the rolled steel rods, in particular also angle profiles of a downstream stacking device for rods Rod precisely aligned transversely to the conveying direction, even if the bars cut to sales lengths from the scissor roller table on a cross conveyor are conveyed in groups so unaligned that the rods are partly close to dense, sometimes with different distances and sometimes at a considerable angle lying next to each other. Since the bars are exactly parallel to each other when stacked and need to be placed on top of each other, they must be misaligned on the cross conveyor The rods fed in are precisely aligned before they are introduced into the stacking system.

This results, especially in the case of angled profile rods, through different Bar spacings and steep inclines, considerable difficulties and potential for interference, which have not yet been resolved in a satisfactory manner.

It is known to align the bars and push them close together, by driving the group of staff that has been fed in front of an advance. Here, angle profiles tend but to climb on top of each other. To get the angle in front of the Dt P 2 219 541 provides a precise setting for the collection point to prevent an advance Bracket as a hold-down device.

In the case of small profile dimensions, tolerance deviations Deflections and misalignments can easily lead to jamming. In addition, through the building structure severely impaired the accessibility of the facility and the constructive Effort significantly increased. According to Dt P 1 555 235 (Fig. 1) is also known to Avoidance of the angle profiles climbing on top of each other using chains to push with wedge-shaped thumbs on sliding rails against the advance. By the However, the thumb slides underneath the jammed sticks Rod feed out of cycle control.

Another way to align angle profiles is through Dt P 2 328 696 known. In this version are to a certain extent for each bar has its own leading edge. These come by gradually raising them used one after the other. When feeding in a very disordered group of rods in this case, however, even with careful control, a temporary jam in front of a leading edge cannot be avoided. Above all, however, the stepped advance templates must be exchanged with every change to a different profile width.

The inventor has therefore set himself the task of creating a device to create the rolled steel bars, in particular angle profile bars, which are grouped be promoted without driving the group in front of an advance, also the staffs the feeder at different distances and sometimes very differently considerable inclination.

To achieve this goal, the invention provides that the as Move the gripper serving hooks and / or magnets under the fed rods and independently of each other individually when reaching the leading edge of the foremost Rod by lifting on the rod and / or by switching on the magnet the rod capture. If the bars are very slanted, the one behind will be the first The end of the rod is grasped and pulled forward until the rod is aligned transversely to the conveying direction and is then gripped by the other grippers.

So that the grippers do not already have the rear bars, but only the Capture the leading edge of the foremost rod in each case, are in front of the in the conveying direction Mechanical buttons or electronic sensors are arranged with grippers that control the conveying level then scan whether there are any bars in front of the grippers and the grippers control individually in a timely manner.

Depending on whether you use hooks, permanent magnets or one-and-one as a gripper Switchable electromagnets are used and whether one uses mechanical buttons or electrical ones Applying sensors and whether or not to move the gripper back and forth on the slide if the grippers are rotated on chains, there are different design options the invention. Figures 1 to 6 show some exemplary embodiments.

Fig. 1 shows an example in which serving as a gripper electromagnet (1) on swivel arms (2) working as buttons in reciprocating carriages (5) are stored.

Fig. 2 shows an embodiment in which on reciprocating slide (27) serving as a gripper electromagnets (2) are attached to which as a button Parallelogram suspension skids (29) are connected upstream.

Fig. 3 differs from Fig. 2 in that instead of electromagnets are provided as gripper hooks (49).

Fig. 4 shows an embodiment when arranged on a carriage Electromagnet (52) for detecting the bars controlled by upstream sensors (53) will.

Fig. 5 illustrates an embodiment in which the gripper on rotating Chains (66) are arranged, namely permanent magnets serving as grippers (62) together with the skids (63) with parallelogram links (64, 65) to the Chains articulated.

6 shows schematically the possibility of using electromagnets as grippers (83) to be attached to rotating chains and closed by rotating sensors (84) steer.

These exemplary embodiments are described below using the figures FIGS. 1 to 6 are described in more detail.

In the embodiment according to FIG. 1, electromagnets can be switched on and off (1) Arranged at the end of swivel arms (3), the back of which in front of the magnet acts as a skid (3) are formed and in front of the adhesive surface of the magnets a step-shaped Form a paragraph. The swivel arms (2) are mounted on pins (4) in the slide (5). Tension springs (6) push the swivel arms (2) upwards just enough that they are above them Rods are not lifted, but these push the swivel arms down. When the slide (5) returns, the swivel arms (2) are actuated by magnetic pushers (7) pressed down below the conveying level. The carriages (5) run on rails (8) and are via push rods (9), the crank arms (10) by connecting rods (11) the on the shaft (12) arranged eccentrics (13) pushed back and forth. Pawls (15) are pivotably mounted on pins (14) in the carriage (5). These are pressed against stops (17) by counterweights (16).

The angle profile bars (18) are fed in by means of carrying chains (19) driven by the shaft (So) via pinion (21) and by chain wheels (22) and (23) are deflected. The rods pulled forward by the electromagnets (1) (18) are then switched to downstream by the pawls (15) on the next stroke Thumb chains (24) pushed on, where they are collected in a counted number of layers be by the thumb chains (24) after each pushed-on bar by a profile width be continued. After a layer has been formed, the next thumb is retracted. Switches (25) are provided in the rod inlet, if these switches on both rod ends have been actuated, the rod feed is stopped and the carriage drive is switched on.

In the embodiment of FIG. 2 are reciprocating Slide (27) on and off switchable electromagnets (28) attached. The ones arranged in front of it Skids (29) can be moved up and down on two parallelogram links (3) and (31) hinged. Tension springs (32) grip the links (30) and press them against them Stops (33) and against the switches () 4) that cause the magnet to be switched on. Counterweights (35) are attached to the links (31). When the carriage returns (27) the skids (29) are pressed down below the conveying level by magnetic pushers (36). Pawls (38) are pivotably mounted on the pin (37) in the carriage (27), which are pressed against stops (41) by counterweights (39) and tension springs (40). The carriages (27) run on rails (42) and are passed through toothed racks (43) Pinion (44) driven.

The angle profile bars (45) are fed in on support chains (46). To control the rod feed and the slide drive are in the rod inlet and switches (47) and (48) are provided on the rack and pinion drive.

The embodiment according to FIG. 3 differs from the embodiment according to FIG. 2 in this way from the fact that all grippers are not used with magnets, but with simple hooks (49). These are attached directly to the end of the runners (29) and grip when springing up the skids behind the front edge of the double T-profiles (50). To grasp Flat iron bars or U-profiles that lie on the back are hook-shaped However, grippers are not very suitable, so that magnetic grippers are usually preferred will.

Fig. 4 shows schematically an embodiment of the invention in which the attached to the carriage (51) and serving as a gripper electromagnets (52) can be controlled directly by these attached sensors (53). These sensors (53) feel the position of the leading edge of the foremost rod of the group of rods being fed in as soon as the carriage (51) returns.

At least two sensors positioned as far as possible at the ends of the rods (53) send their tactile impulses to the memory of a control unit (not shown) and thus fix the slide position in which the associated electromagnet is switched on will. If in the meantime the bars (54) continue on the supply chain (55) moved forward or new bars are promoted, the advance path of the bars becomes also registered after passing the sensors (53) in the control unit.

The carriages (51) run on rails (56) and are driven by pinions (57) driven by toothed racks (58). In the carriage (51) are on pins (59) Pawls (60) pivotably mounted, which are pulled forward by the electromagnet Push the sticks onto the following thumb chains (61) to form sticks.

Fig. 5 shows an embodiment with revolving grippers.

The grippers are designed as permanent magnets (62) and are attached the skids (63) attached, which in turn with parallelogram links (64) and (65) are hinged to revolving chains (66). By tension springs (67) the Skids (63) pressed into the conveying plane of the bars while running in the upper run of the chain. For stripping the rods from the permanent magnets (62) are in the conveying line protruding edges (68) are provided. The chains (66) are driven through the shaft (69) via the sprockets (70). The chains run at the other end (66) over the deflection wheels (71).

On the shaft (66) is a rod transfer device with rotating Pockets (72) and push-off thumb (73) arranged. These pockets (72) are eccentric on three-armed rotary stars (74) and (75) rotating around each other, of which the rotating stars (74) are attached to the shaft (66), while the rotating stars (75) revolve on eccentrics (76).

The groups of rods are fed in on carrying chains (77) in such a way that a whole group of rods is in the area of the chains (66) rotating gripper is introduced, where then continuously removed rod by rod without the rods in between through the support chains (77) further forward must be brought. The support chains (77) are driven by the shaft (78) via pinions (79) driven and deflected and tensioned via wheels (80) and (81).

Fig. 6 shows in the scheme a further embodiment with circumferential Grippers. Electromagnets (83) are attached to circulating chains (82), which are controlled by sensors (84) which also co-surround. The The distance between the sensor (84) and the following electromagnet (83) must be greater than the maximum allowable distance between the ends of two adjacent bars. The electromagnets and the sensors must circulate within the respective Effective area via contact fingers (85) and (86) with associated contact rails (87) and (88) are related.

Can several electromagnets (83) and / or Sensors (84) are in function at the same time, so contact rails (87) must also and / or (88) are available in a corresponding number.

The chains (82) are driven by the shaft (89) via chain wheels (90). The chains (82) are deflected by the sprockets (91) on pins (92) circulate.

The angle profile bars (93) are conveyed by carrying chains (94), which are driven by the shaft (89) via chain wheels (96). The ones from the electromagnets (83) bars (83) drawn in advance on rails (97) are placed at the outlet of the chains (82) deposited by switching off the magnets and then by pushing arms (98), which with of the shaft (89), pushed out of the area of the chains.

The invention thus makes it possible to use sectional steel bars, in particular Angle profiles also then within easy reach in automatically working stacking devices to be introduced when the bars are at different inclines from the scissor roller table and distances to be sold. The bars can be easily counted in Collect the number aligned in parallel and close to each other in layers to then to be turned and / or deposited in layers. For profile steel stacking devices, in which the rods are turned and deposited one after the other, the Rods can also be added individually in time. Since the invention executed rod feeders, the grippers are moved in time, need them in this case no drive of its own, but can be used together with the discarding and / or turning members of the stacking device are driven. The elimination of one Drive not only means a considerable reduction in mechanical effort, it also simplifies the control considerably.

Claims (12)

Claims 0 bar feeder of the rolled bars, in particular angle profile bars, which are fed in groups lying next to each other, unaligned and unevenly spaced with several arranged next to each other over the length of the rods, jointly movable hooks and magnets or magnets serving as grippers one after the other Rod for rod captured, aligned and direct or via intermediary additional conveyor links of a downstream conveyor, driven jointly with the grippers Rod transfer or collecting device supplies, d a d u r c h e k e n n n z e i c n e t that the hooks (49) and / or magnets (1, 28, 52, 62, 83) move below the conveyor level of the rods and to detect a rod be brought up to this from below and / or switched on under the rod and that mechanical buttons (5, 29, 63) and / or in front of the grippers in the conveying direction electronic sensors (53, 84) are arranged, which cover the space in front of the grippers sample a length greater than the maximum allowable distance between two adjacent rod ends of the rod group being funded. 2. Rod feeder according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the button skids (3, 29, 6)) have spring force (6, 32, 67) and / or counterweights (35) are pushed up and in their upper Position protrude beyond the conveying level over a length that is greater than al the maximum permissible distance between two adjacent rod ends and that the ends of the skids (3, 29, 63) to the grippers (1, 28, 49, 62) fall in steps. 3. Rod feeder according to claim 1 and 2, d a d u r c h g e k e n n show that the hooks (49) and / or magnets (1, 52) used as grippers be moved up and down together with the skids (3, 29, 63). 4. rod feeder according to claim 1, d a d u r c h g e k e n n z e i c h n e t that electromagnets (1, 28, 52> 83) serve. 5. Rod feeder according to claim 2 and 4, d a d u r c h g e k e n n notices that to switch on the electromagnets (1, 28) switches (26, 34) are provided, which are moved with the grippers and which are switched on by the upstream buttons (3, 29). 6. bar feeder according to claim 1 and 4, d a d u r c h g e k e n n z e i c h n e t that in the conveying direction in front of the electromagnet serving as a gripper (52, 83) sensors (53, 84) are arranged, the bars lying in front of the grippers scan and the position of the leading edge of the foremost rod of the conveyed Determine group, with at least two sensors their scanning values independently of one another Enter into a control device that sends the switch-on command for the assigned Electromagnet triggers. 7. bar feeder according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the grippers are arranged on reciprocating carriages (5, 27, 51) are, the stroke of which is at least the largest profile width greater than the measure to that measured the two ends of a rod at maximum inclination in the conveying direction can be offset from one another. 8. bar feeder according to claim 7, d a d u r c h g e k e n n z e i c h n e t that pawls (15, 38, 60) are arranged on the carriage (5, 27, 51), which slide away under the bars above when the carriage returns and their abutting edges are at a distance in front of the grippers of at least the maximum profile width is smaller than the slide stroke but larger than that Measure by which the two ends of a rod at maximum inclination in the conveying direction measured against each other can be offset. 9. Rod feeder according to claim 2 and 7, d a d u r c h g e k e n n z e i c h n e t that the up and down sliding skids (3, 29) when returning the carriage (5, 27, 51) by pushers (7, 36) below the conveyor level of the bars be pressed. 10. Rod feeder according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the hooks and / or magnets (62, 83) serving as grippers, as well as the buttons (63 and / or sensors (84) are arranged on circulating chains (66, 82) are. 11. Rod conveyor according to claim 10, d a d u r c h g e k e n n z e i c h n e t that at the end of the chains circulating with the feeler and gripper links (66) with these jointly driven further conveyor members (72, 76, 98) rotate. 12. Bar feeder according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the gripper together with the turning and / or depositing members of a downstream stacking device, which turns and deposits the bars individually, driven will.